7988 lines
231 KiB
C
7988 lines
231 KiB
C
/* 32-bit ELF support for ARM
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Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/arm.h"
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#ifndef NUM_ELEM
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#define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
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#endif
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#define elf_info_to_howto 0
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#define elf_info_to_howto_rel elf32_arm_info_to_howto
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#define ARM_ELF_ABI_VERSION 0
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#define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
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/* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
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R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
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in that slot. */
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static reloc_howto_type elf32_arm_howto_table_1[] =
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{
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/* No relocation */
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HOWTO (R_ARM_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_PC24, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_PC24", /* name */
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FALSE, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* 32 bit absolute */
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HOWTO (R_ARM_ABS32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_ABS32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* standard 32bit pc-relative reloc */
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HOWTO (R_ARM_REL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_REL32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
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HOWTO (R_ARM_PC13, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_PC13", /* name */
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FALSE, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* 16 bit absolute */
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HOWTO (R_ARM_ABS16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_ABS16", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* 12 bit absolute */
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HOWTO (R_ARM_ABS12, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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12, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_ABS12", /* name */
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FALSE, /* partial_inplace */
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0x000008ff, /* src_mask */
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0x000008ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_THM_ABS5, /* type */
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6, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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5, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_THM_ABS5", /* name */
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FALSE, /* partial_inplace */
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0x000007e0, /* src_mask */
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0x000007e0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* 8 bit absolute */
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HOWTO (R_ARM_ABS8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_ABS8", /* name */
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FALSE, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_SBREL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_SBREL32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* FIXME: Has two more bits of offset in Thumb32. */
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HOWTO (R_ARM_THM_CALL, /* type */
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1, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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23, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_THM_CALL", /* name */
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FALSE, /* partial_inplace */
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0x07ff07ff, /* src_mask */
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0x07ff07ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_ARM_THM_PC8, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_THM_PC8", /* name */
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FALSE, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_ARM_BREL_ADJ, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_BREL_ADJ", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_SWI24, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_SWI24", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x00000000, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_THM_SWI8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_SWI8", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x00000000, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* BLX instruction for the ARM. */
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HOWTO (R_ARM_XPC25, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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25, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_XPC25", /* name */
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FALSE, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* BLX instruction for the Thumb. */
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HOWTO (R_ARM_THM_XPC22, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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22, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_THM_XPC22", /* name */
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FALSE, /* partial_inplace */
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0x07ff07ff, /* src_mask */
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0x07ff07ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* Dynamic TLS relocations. */
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HOWTO (R_ARM_TLS_DTPMOD32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_TLS_DTPMOD32", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_TLS_DTPOFF32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_TLS_DTPOFF32", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_TLS_TPOFF32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_TLS_TPOFF32", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Relocs used in ARM Linux */
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HOWTO (R_ARM_COPY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_COPY", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_GLOB_DAT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_GLOB_DAT", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_JUMP_SLOT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_JUMP_SLOT", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_RELATIVE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_RELATIVE", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_GOTOFF32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_GOTOFF32", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_GOTPC, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_GOTPC", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_ARM_GOT32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_GOT32", /* name */
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TRUE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_ARM_PLT32, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
|
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bfd_elf_generic_reloc, /* special_function */
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"R_ARM_PLT32", /* name */
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FALSE, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_ARM_CALL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
|
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bfd_elf_generic_reloc, /* special_function */
|
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"R_ARM_CALL", /* name */
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FALSE, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_ARM_JUMP24, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_JUMP24", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00ffffff, /* src_mask */
|
|
0x00ffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_JUMP24, /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
24, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_JUMP24", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x07ff2fff, /* src_mask */
|
|
0x07ff2fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_BASE_ABS, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_BASE_ABS", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ALU_PCREL7_0, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ALU_PCREL_7_0", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ALU_PCREL15_8, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
8, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ALU_PCREL_15_8",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ALU_PCREL23_15, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
16, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ALU_PCREL_23_15",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_LDR_SBREL_11_0",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
12, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ALU_SBREL_19_12",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x000ff000, /* src_mask */
|
|
0x000ff000, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
20, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ALU_SBREL_27_20",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0ff00000, /* src_mask */
|
|
0x0ff00000, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TARGET1, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TARGET1", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ROSEGREL32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ROSEGREL32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_V4BX, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_V4BX", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TARGET2, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TARGET2", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_PREL31, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
31, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_PREL31", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x7fffffff, /* src_mask */
|
|
0x7fffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVW_ABS_NC, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVW_ABS_NC", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVT_ABS, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVT_ABS", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVW_PREL_NC, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVW_PREL_NC", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVT_PREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVT_PREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVW_ABS_NC",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVT_ABS, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVT_ABS", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVW_PREL_NC",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVT_PREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVT_PREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_JUMP19, /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_JUMP19", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x043f2fff, /* src_mask */
|
|
0x043f2fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_JUMP6, /* type */
|
|
1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
6, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_JUMP6", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x02f8, /* src_mask */
|
|
0x02f8, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* These are declared as 13-bit signed relocations because we can
|
|
address -4095 .. 4095(base) by altering ADDW to SUBW or vice
|
|
versa. */
|
|
HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
13, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_ALU_PREL_11_0",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040070ff, /* src_mask */
|
|
0x040070ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_PC12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
13, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_PC12", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040070ff, /* src_mask */
|
|
0x040070ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_ABS32_NOI, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_ABS32_NOI", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_REL32_NOI, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_REL32_NOI", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
};
|
|
|
|
/* Relocations 57 .. 83 are the "group relocations" which we do not
|
|
support. */
|
|
|
|
static reloc_howto_type elf32_arm_howto_table_2[] =
|
|
{
|
|
HOWTO (R_ARM_MOVW_BREL_NC, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVW_BREL_NC", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVT_BREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVT_BREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_MOVW_BREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_MOVW_BREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVW_BREL_NC",/* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVT_BREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVT_BREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_MOVW_BREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_MOVW_BREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x040f70ff, /* src_mask */
|
|
0x040f70ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
EMPTY_HOWTO (90), /* unallocated */
|
|
EMPTY_HOWTO (91),
|
|
EMPTY_HOWTO (92),
|
|
EMPTY_HOWTO (93),
|
|
|
|
HOWTO (R_ARM_PLT32_ABS, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_PLT32_ABS", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_GOT_ABS, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_GOT_ABS", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_GOT_PREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_GOT_PREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_GOT_BREL12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_GOT_BREL12", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_GOTOFF12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_GOTOFF12", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
|
|
|
|
/* GNU extension to record C++ vtable member usage */
|
|
HOWTO (R_ARM_GNU_VTENTRY, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
|
"R_ARM_GNU_VTENTRY", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy */
|
|
HOWTO (R_ARM_GNU_VTINHERIT, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_ARM_GNU_VTINHERIT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_JUMP11, /* type */
|
|
1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
11, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_JUMP11", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x000007ff, /* src_mask */
|
|
0x000007ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_THM_JUMP8, /* type */
|
|
1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_THM_JUMP8", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x000000ff, /* src_mask */
|
|
0x000000ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* TLS relocations */
|
|
HOWTO (R_ARM_TLS_GD32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_ARM_TLS_GD32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_LDM32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_LDM32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_LDO32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_LDO32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_IE32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_ARM_TLS_IE32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_LE32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_LE32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_LDO12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_LDO12", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_LE12, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_LE12", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_TLS_IE12GP, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_TLS_IE12GP", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x00000fff, /* src_mask */
|
|
0x00000fff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
};
|
|
|
|
/* 112-127 private relocations
|
|
128 R_ARM_ME_TOO, obsolete
|
|
129-255 unallocated in AAELF.
|
|
|
|
249-255 extended, currently unused, relocations: */
|
|
|
|
static reloc_howto_type elf32_arm_howto_table_3[4] =
|
|
{
|
|
HOWTO (R_ARM_RREL32, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_RREL32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_RABS32, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_RABS32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_RPC24, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_RPC24", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_ARM_RBASE, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_ARM_RBASE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE) /* pcrel_offset */
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
elf32_arm_howto_from_type (unsigned int r_type)
|
|
{
|
|
if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
|
|
return &elf32_arm_howto_table_1[r_type];
|
|
|
|
if (r_type >= R_ARM_MOVW_BREL_NC
|
|
&& r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2))
|
|
return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC];
|
|
|
|
if (r_type >= R_ARM_RREL32
|
|
&& r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
|
|
return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
|
|
Elf_Internal_Rela * elf_reloc)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (elf_reloc->r_info);
|
|
bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
|
|
}
|
|
|
|
struct elf32_arm_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
/* All entries in this list must also be present in elf32_arm_howto_table. */
|
|
static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
|
|
{
|
|
{BFD_RELOC_NONE, R_ARM_NONE},
|
|
{BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
|
|
{BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
|
|
{BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
|
|
{BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
|
|
{BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
|
|
{BFD_RELOC_32, R_ARM_ABS32},
|
|
{BFD_RELOC_32_PCREL, R_ARM_REL32},
|
|
{BFD_RELOC_8, R_ARM_ABS8},
|
|
{BFD_RELOC_16, R_ARM_ABS16},
|
|
{BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
|
|
{BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
|
|
{BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
|
|
{BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
|
|
{BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
|
|
{BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
|
|
{BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
|
|
{BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
|
|
{BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
|
|
{BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
|
|
{BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
|
|
{BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
|
|
{BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
|
|
{BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
|
|
{BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
|
|
{BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
|
|
{BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
|
|
{BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
|
|
{BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
|
|
{BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
|
|
{BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
|
|
{BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
|
|
{BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
|
|
{BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
|
|
{BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
|
|
{BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
|
|
if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
|
|
return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Support for core dump NOTE sections */
|
|
static bfd_boolean
|
|
elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
|
|
{
|
|
int offset;
|
|
size_t size;
|
|
|
|
switch (note->descsz)
|
|
{
|
|
default:
|
|
return FALSE;
|
|
|
|
case 148: /* Linux/ARM 32-bit*/
|
|
/* pr_cursig */
|
|
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
|
|
|
|
/* pr_pid */
|
|
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
|
|
|
|
/* pr_reg */
|
|
offset = 72;
|
|
size = 72;
|
|
|
|
break;
|
|
}
|
|
|
|
/* Make a ".reg/999" section. */
|
|
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
|
size, note->descpos + offset);
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
|
|
{
|
|
switch (note->descsz)
|
|
{
|
|
default:
|
|
return FALSE;
|
|
|
|
case 124: /* Linux/ARM elf_prpsinfo */
|
|
elf_tdata (abfd)->core_program
|
|
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
|
|
elf_tdata (abfd)->core_command
|
|
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
|
|
}
|
|
|
|
/* Note that for some reason, a spurious space is tacked
|
|
onto the end of the args in some (at least one anyway)
|
|
implementations, so strip it off if it exists. */
|
|
|
|
{
|
|
char *command = elf_tdata (abfd)->core_command;
|
|
int n = strlen (command);
|
|
|
|
if (0 < n && command[n - 1] == ' ')
|
|
command[n - 1] = '\0';
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
|
|
#define TARGET_LITTLE_NAME "elf32-littlearm"
|
|
#define TARGET_BIG_SYM bfd_elf32_bigarm_vec
|
|
#define TARGET_BIG_NAME "elf32-bigarm"
|
|
|
|
#define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
|
|
#define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
|
|
|
|
typedef unsigned long int insn32;
|
|
typedef unsigned short int insn16;
|
|
|
|
/* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
|
|
#define INTERWORK_FLAG(abfd) \
|
|
(EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
|
|
|| (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
|
|
|
|
/* The linker script knows the section names for placement.
|
|
The entry_names are used to do simple name mangling on the stubs.
|
|
Given a function name, and its type, the stub can be found. The
|
|
name can be changed. The only requirement is the %s be present. */
|
|
#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
|
|
#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
|
|
|
|
#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
|
|
#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
|
|
|
|
/* The name of the dynamic interpreter. This is put in the .interp
|
|
section. */
|
|
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
|
|
|
|
#ifdef FOUR_WORD_PLT
|
|
|
|
/* The first entry in a procedure linkage table looks like
|
|
this. It is set up so that any shared library function that is
|
|
called before the relocation has been set up calls the dynamic
|
|
linker first. */
|
|
static const bfd_vma elf32_arm_plt0_entry [] =
|
|
{
|
|
0xe52de004, /* str lr, [sp, #-4]! */
|
|
0xe59fe010, /* ldr lr, [pc, #16] */
|
|
0xe08fe00e, /* add lr, pc, lr */
|
|
0xe5bef008, /* ldr pc, [lr, #8]! */
|
|
};
|
|
|
|
/* Subsequent entries in a procedure linkage table look like
|
|
this. */
|
|
static const bfd_vma elf32_arm_plt_entry [] =
|
|
{
|
|
0xe28fc600, /* add ip, pc, #NN */
|
|
0xe28cca00, /* add ip, ip, #NN */
|
|
0xe5bcf000, /* ldr pc, [ip, #NN]! */
|
|
0x00000000, /* unused */
|
|
};
|
|
|
|
#else
|
|
|
|
/* The first entry in a procedure linkage table looks like
|
|
this. It is set up so that any shared library function that is
|
|
called before the relocation has been set up calls the dynamic
|
|
linker first. */
|
|
static const bfd_vma elf32_arm_plt0_entry [] =
|
|
{
|
|
0xe52de004, /* str lr, [sp, #-4]! */
|
|
0xe59fe004, /* ldr lr, [pc, #4] */
|
|
0xe08fe00e, /* add lr, pc, lr */
|
|
0xe5bef008, /* ldr pc, [lr, #8]! */
|
|
0x00000000, /* &GOT[0] - . */
|
|
};
|
|
|
|
/* Subsequent entries in a procedure linkage table look like
|
|
this. */
|
|
static const bfd_vma elf32_arm_plt_entry [] =
|
|
{
|
|
0xe28fc600, /* add ip, pc, #0xNN00000 */
|
|
0xe28cca00, /* add ip, ip, #0xNN000 */
|
|
0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
|
|
};
|
|
|
|
#endif
|
|
|
|
/* An initial stub used if the PLT entry is referenced from Thumb code. */
|
|
#define PLT_THUMB_STUB_SIZE 4
|
|
static const bfd_vma elf32_arm_plt_thumb_stub [] =
|
|
{
|
|
0x4778, /* bx pc */
|
|
0x46c0 /* nop */
|
|
};
|
|
|
|
/* The entries in a PLT when using a DLL-based target with multiple
|
|
address spaces. */
|
|
static const bfd_vma elf32_arm_symbian_plt_entry [] =
|
|
{
|
|
0xe51ff004, /* ldr pc, [pc, #-4] */
|
|
0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
|
|
};
|
|
|
|
/* Used to build a map of a section. This is required for mixed-endian
|
|
code/data. */
|
|
|
|
typedef struct elf32_elf_section_map
|
|
{
|
|
bfd_vma vma;
|
|
char type;
|
|
}
|
|
elf32_arm_section_map;
|
|
|
|
typedef struct _arm_elf_section_data
|
|
{
|
|
struct bfd_elf_section_data elf;
|
|
unsigned int mapcount;
|
|
elf32_arm_section_map *map;
|
|
}
|
|
_arm_elf_section_data;
|
|
|
|
#define elf32_arm_section_data(sec) \
|
|
((_arm_elf_section_data *) elf_section_data (sec))
|
|
|
|
/* The size of the thread control block. */
|
|
#define TCB_SIZE 8
|
|
|
|
#define NUM_KNOWN_ATTRIBUTES 32
|
|
|
|
typedef struct aeabi_attribute
|
|
{
|
|
int type;
|
|
unsigned int i;
|
|
char *s;
|
|
} aeabi_attribute;
|
|
|
|
typedef struct aeabi_attribute_list
|
|
{
|
|
struct aeabi_attribute_list *next;
|
|
int tag;
|
|
aeabi_attribute attr;
|
|
} aeabi_attribute_list;
|
|
|
|
struct elf32_arm_obj_tdata
|
|
{
|
|
struct elf_obj_tdata root;
|
|
|
|
/* tls_type for each local got entry. */
|
|
char *local_got_tls_type;
|
|
|
|
aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES];
|
|
aeabi_attribute_list *other_eabi_attributes;
|
|
};
|
|
|
|
#define elf32_arm_tdata(abfd) \
|
|
((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
|
|
|
|
#define elf32_arm_local_got_tls_type(abfd) \
|
|
(elf32_arm_tdata (abfd)->local_got_tls_type)
|
|
|
|
static bfd_boolean
|
|
elf32_arm_mkobject (bfd *abfd)
|
|
{
|
|
bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
|
|
abfd->tdata.any = bfd_zalloc (abfd, amt);
|
|
if (abfd->tdata.any == NULL)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
/* The ARM linker needs to keep track of the number of relocs that it
|
|
decides to copy in check_relocs for each symbol. This is so that
|
|
it can discard PC relative relocs if it doesn't need them when
|
|
linking with -Bsymbolic. We store the information in a field
|
|
extending the regular ELF linker hash table. */
|
|
|
|
/* This structure keeps track of the number of relocs we have copied
|
|
for a given symbol. */
|
|
struct elf32_arm_relocs_copied
|
|
{
|
|
/* Next section. */
|
|
struct elf32_arm_relocs_copied * next;
|
|
/* A section in dynobj. */
|
|
asection * section;
|
|
/* Number of relocs copied in this section. */
|
|
bfd_size_type count;
|
|
/* Number of PC-relative relocs copied in this section. */
|
|
bfd_size_type pc_count;
|
|
};
|
|
|
|
#define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
|
|
|
|
/* Arm ELF linker hash entry. */
|
|
struct elf32_arm_link_hash_entry
|
|
{
|
|
struct elf_link_hash_entry root;
|
|
|
|
/* Number of PC relative relocs copied for this symbol. */
|
|
struct elf32_arm_relocs_copied * relocs_copied;
|
|
|
|
/* We reference count Thumb references to a PLT entry separately,
|
|
so that we can emit the Thumb trampoline only if needed. */
|
|
bfd_signed_vma plt_thumb_refcount;
|
|
|
|
/* Since PLT entries have variable size if the Thumb prologue is
|
|
used, we need to record the index into .got.plt instead of
|
|
recomputing it from the PLT offset. */
|
|
bfd_signed_vma plt_got_offset;
|
|
|
|
#define GOT_UNKNOWN 0
|
|
#define GOT_NORMAL 1
|
|
#define GOT_TLS_GD 2
|
|
#define GOT_TLS_IE 4
|
|
unsigned char tls_type;
|
|
};
|
|
|
|
/* Traverse an arm ELF linker hash table. */
|
|
#define elf32_arm_link_hash_traverse(table, func, info) \
|
|
(elf_link_hash_traverse \
|
|
(&(table)->root, \
|
|
(bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
|
|
(info)))
|
|
|
|
/* Get the ARM elf linker hash table from a link_info structure. */
|
|
#define elf32_arm_hash_table(info) \
|
|
((struct elf32_arm_link_hash_table *) ((info)->hash))
|
|
|
|
/* ARM ELF linker hash table. */
|
|
struct elf32_arm_link_hash_table
|
|
{
|
|
/* The main hash table. */
|
|
struct elf_link_hash_table root;
|
|
|
|
/* The size in bytes of the section containing the Thumb-to-ARM glue. */
|
|
bfd_size_type thumb_glue_size;
|
|
|
|
/* The size in bytes of the section containing the ARM-to-Thumb glue. */
|
|
bfd_size_type arm_glue_size;
|
|
|
|
/* An arbitrary input BFD chosen to hold the glue sections. */
|
|
bfd * bfd_of_glue_owner;
|
|
|
|
/* Nonzero to output a BE8 image. */
|
|
int byteswap_code;
|
|
|
|
/* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
|
|
Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
|
|
int target1_is_rel;
|
|
|
|
/* The relocation to use for R_ARM_TARGET2 relocations. */
|
|
int target2_reloc;
|
|
|
|
/* Nonzero to fix BX instructions for ARMv4 targets. */
|
|
int fix_v4bx;
|
|
|
|
/* Nonzero if the ARM/Thumb BLX instructions are available for use. */
|
|
int use_blx;
|
|
|
|
/* The number of bytes in the initial entry in the PLT. */
|
|
bfd_size_type plt_header_size;
|
|
|
|
/* The number of bytes in the subsequent PLT etries. */
|
|
bfd_size_type plt_entry_size;
|
|
|
|
/* True if the target system is Symbian OS. */
|
|
int symbian_p;
|
|
|
|
/* True if the target uses REL relocations. */
|
|
int use_rel;
|
|
|
|
/* Short-cuts to get to dynamic linker sections. */
|
|
asection *sgot;
|
|
asection *sgotplt;
|
|
asection *srelgot;
|
|
asection *splt;
|
|
asection *srelplt;
|
|
asection *sdynbss;
|
|
asection *srelbss;
|
|
|
|
/* Data for R_ARM_TLS_LDM32 relocations. */
|
|
union {
|
|
bfd_signed_vma refcount;
|
|
bfd_vma offset;
|
|
} tls_ldm_got;
|
|
|
|
/* Small local sym to section mapping cache. */
|
|
struct sym_sec_cache sym_sec;
|
|
|
|
/* For convenience in allocate_dynrelocs. */
|
|
bfd * obfd;
|
|
};
|
|
|
|
/* Create an entry in an ARM ELF linker hash table. */
|
|
|
|
static struct bfd_hash_entry *
|
|
elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
|
|
struct bfd_hash_table * table,
|
|
const char * string)
|
|
{
|
|
struct elf32_arm_link_hash_entry * ret =
|
|
(struct elf32_arm_link_hash_entry *) entry;
|
|
|
|
/* Allocate the structure if it has not already been allocated by a
|
|
subclass. */
|
|
if (ret == (struct elf32_arm_link_hash_entry *) NULL)
|
|
ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
|
|
if (ret == NULL)
|
|
return (struct bfd_hash_entry *) ret;
|
|
|
|
/* Call the allocation method of the superclass. */
|
|
ret = ((struct elf32_arm_link_hash_entry *)
|
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
|
table, string));
|
|
if (ret != NULL)
|
|
{
|
|
ret->relocs_copied = NULL;
|
|
ret->tls_type = GOT_UNKNOWN;
|
|
ret->plt_thumb_refcount = 0;
|
|
ret->plt_got_offset = -1;
|
|
}
|
|
|
|
return (struct bfd_hash_entry *) ret;
|
|
}
|
|
|
|
/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
|
|
shortcuts to them in our hash table. */
|
|
|
|
static bfd_boolean
|
|
create_got_section (bfd *dynobj, struct bfd_link_info *info)
|
|
{
|
|
struct elf32_arm_link_hash_table *htab;
|
|
|
|
htab = elf32_arm_hash_table (info);
|
|
/* BPABI objects never have a GOT, or associated sections. */
|
|
if (htab->symbian_p)
|
|
return TRUE;
|
|
|
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
|
return FALSE;
|
|
|
|
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
|
htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
|
if (!htab->sgot || !htab->sgotplt)
|
|
abort ();
|
|
|
|
htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
|
|
(SEC_ALLOC | SEC_LOAD
|
|
| SEC_HAS_CONTENTS
|
|
| SEC_IN_MEMORY
|
|
| SEC_LINKER_CREATED
|
|
| SEC_READONLY));
|
|
if (htab->srelgot == NULL
|
|
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
|
|
.rel.bss sections in DYNOBJ, and set up shortcuts to them in our
|
|
hash table. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
|
|
{
|
|
struct elf32_arm_link_hash_table *htab;
|
|
|
|
htab = elf32_arm_hash_table (info);
|
|
if (!htab->sgot && !create_got_section (dynobj, info))
|
|
return FALSE;
|
|
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
|
return FALSE;
|
|
|
|
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
|
htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
|
|
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
|
if (!info->shared)
|
|
htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
|
|
|
|
if (!htab->splt
|
|
|| !htab->srelplt
|
|
|| !htab->sdynbss
|
|
|| (!info->shared && !htab->srelbss))
|
|
abort ();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
|
|
|
static void
|
|
elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *dir,
|
|
struct elf_link_hash_entry *ind)
|
|
{
|
|
struct elf32_arm_link_hash_entry *edir, *eind;
|
|
|
|
edir = (struct elf32_arm_link_hash_entry *) dir;
|
|
eind = (struct elf32_arm_link_hash_entry *) ind;
|
|
|
|
if (eind->relocs_copied != NULL)
|
|
{
|
|
if (edir->relocs_copied != NULL)
|
|
{
|
|
struct elf32_arm_relocs_copied **pp;
|
|
struct elf32_arm_relocs_copied *p;
|
|
|
|
/* Add reloc counts against the indirect sym to the direct sym
|
|
list. Merge any entries against the same section. */
|
|
for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
|
|
{
|
|
struct elf32_arm_relocs_copied *q;
|
|
|
|
for (q = edir->relocs_copied; q != NULL; q = q->next)
|
|
if (q->section == p->section)
|
|
{
|
|
q->pc_count += p->pc_count;
|
|
q->count += p->count;
|
|
*pp = p->next;
|
|
break;
|
|
}
|
|
if (q == NULL)
|
|
pp = &p->next;
|
|
}
|
|
*pp = edir->relocs_copied;
|
|
}
|
|
|
|
edir->relocs_copied = eind->relocs_copied;
|
|
eind->relocs_copied = NULL;
|
|
}
|
|
|
|
/* Copy over PLT info. */
|
|
edir->plt_thumb_refcount += eind->plt_thumb_refcount;
|
|
eind->plt_thumb_refcount = 0;
|
|
|
|
if (ind->root.type == bfd_link_hash_indirect
|
|
&& dir->got.refcount <= 0)
|
|
{
|
|
edir->tls_type = eind->tls_type;
|
|
eind->tls_type = GOT_UNKNOWN;
|
|
}
|
|
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
|
}
|
|
|
|
/* Create an ARM elf linker hash table. */
|
|
|
|
static struct bfd_link_hash_table *
|
|
elf32_arm_link_hash_table_create (bfd *abfd)
|
|
{
|
|
struct elf32_arm_link_hash_table *ret;
|
|
bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
|
|
|
|
ret = bfd_malloc (amt);
|
|
if (ret == NULL)
|
|
return NULL;
|
|
|
|
if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
|
|
elf32_arm_link_hash_newfunc))
|
|
{
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
|
|
ret->sgot = NULL;
|
|
ret->sgotplt = NULL;
|
|
ret->srelgot = NULL;
|
|
ret->splt = NULL;
|
|
ret->srelplt = NULL;
|
|
ret->sdynbss = NULL;
|
|
ret->srelbss = NULL;
|
|
ret->thumb_glue_size = 0;
|
|
ret->arm_glue_size = 0;
|
|
ret->bfd_of_glue_owner = NULL;
|
|
ret->byteswap_code = 0;
|
|
ret->target1_is_rel = 0;
|
|
ret->target2_reloc = R_ARM_NONE;
|
|
#ifdef FOUR_WORD_PLT
|
|
ret->plt_header_size = 16;
|
|
ret->plt_entry_size = 16;
|
|
#else
|
|
ret->plt_header_size = 20;
|
|
ret->plt_entry_size = 12;
|
|
#endif
|
|
ret->fix_v4bx = 0;
|
|
ret->use_blx = 0;
|
|
ret->symbian_p = 0;
|
|
ret->use_rel = 1;
|
|
ret->sym_sec.abfd = NULL;
|
|
ret->obfd = abfd;
|
|
ret->tls_ldm_got.refcount = 0;
|
|
|
|
return &ret->root.root;
|
|
}
|
|
|
|
/* Locate the Thumb encoded calling stub for NAME. */
|
|
|
|
static struct elf_link_hash_entry *
|
|
find_thumb_glue (struct bfd_link_info *link_info,
|
|
const char *name,
|
|
bfd *input_bfd)
|
|
{
|
|
char *tmp_name;
|
|
struct elf_link_hash_entry *hash;
|
|
struct elf32_arm_link_hash_table *hash_table;
|
|
|
|
/* We need a pointer to the armelf specific hash table. */
|
|
hash_table = elf32_arm_hash_table (link_info);
|
|
|
|
tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
|
|
+ strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
|
|
|
|
BFD_ASSERT (tmp_name);
|
|
|
|
sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
|
|
|
|
hash = elf_link_hash_lookup
|
|
(&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
|
|
|
|
if (hash == NULL)
|
|
/* xgettext:c-format */
|
|
(*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
|
|
input_bfd, tmp_name, name);
|
|
|
|
free (tmp_name);
|
|
|
|
return hash;
|
|
}
|
|
|
|
/* Locate the ARM encoded calling stub for NAME. */
|
|
|
|
static struct elf_link_hash_entry *
|
|
find_arm_glue (struct bfd_link_info *link_info,
|
|
const char *name,
|
|
bfd *input_bfd)
|
|
{
|
|
char *tmp_name;
|
|
struct elf_link_hash_entry *myh;
|
|
struct elf32_arm_link_hash_table *hash_table;
|
|
|
|
/* We need a pointer to the elfarm specific hash table. */
|
|
hash_table = elf32_arm_hash_table (link_info);
|
|
|
|
tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
|
|
+ strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
|
|
|
|
BFD_ASSERT (tmp_name);
|
|
|
|
sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
|
|
|
|
myh = elf_link_hash_lookup
|
|
(&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
|
|
|
|
if (myh == NULL)
|
|
/* xgettext:c-format */
|
|
(*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
|
|
input_bfd, tmp_name, name);
|
|
|
|
free (tmp_name);
|
|
|
|
return myh;
|
|
}
|
|
|
|
/* ARM->Thumb glue (static images):
|
|
|
|
.arm
|
|
__func_from_arm:
|
|
ldr r12, __func_addr
|
|
bx r12
|
|
__func_addr:
|
|
.word func @ behave as if you saw a ARM_32 reloc.
|
|
|
|
(relocatable images)
|
|
.arm
|
|
__func_from_arm:
|
|
ldr r12, __func_offset
|
|
add r12, r12, pc
|
|
bx r12
|
|
__func_offset:
|
|
.word func - .
|
|
*/
|
|
|
|
#define ARM2THUMB_STATIC_GLUE_SIZE 12
|
|
static const insn32 a2t1_ldr_insn = 0xe59fc000;
|
|
static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
|
|
static const insn32 a2t3_func_addr_insn = 0x00000001;
|
|
|
|
#define ARM2THUMB_PIC_GLUE_SIZE 16
|
|
static const insn32 a2t1p_ldr_insn = 0xe59fc004;
|
|
static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
|
|
static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
|
|
|
|
/* Thumb->ARM: Thumb->(non-interworking aware) ARM
|
|
|
|
.thumb .thumb
|
|
.align 2 .align 2
|
|
__func_from_thumb: __func_from_thumb:
|
|
bx pc push {r6, lr}
|
|
nop ldr r6, __func_addr
|
|
.arm mov lr, pc
|
|
__func_change_to_arm: bx r6
|
|
b func .arm
|
|
__func_back_to_thumb:
|
|
ldmia r13! {r6, lr}
|
|
bx lr
|
|
__func_addr:
|
|
.word func */
|
|
|
|
#define THUMB2ARM_GLUE_SIZE 8
|
|
static const insn16 t2a1_bx_pc_insn = 0x4778;
|
|
static const insn16 t2a2_noop_insn = 0x46c0;
|
|
static const insn32 t2a3_b_insn = 0xea000000;
|
|
|
|
#ifndef ELFARM_NABI_C_INCLUDED
|
|
bfd_boolean
|
|
bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
|
|
{
|
|
asection * s;
|
|
bfd_byte * foo;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
|
|
if (globals->arm_glue_size != 0)
|
|
{
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
|
|
ARM2THUMB_GLUE_SECTION_NAME);
|
|
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
|
|
|
|
s->size = globals->arm_glue_size;
|
|
s->contents = foo;
|
|
}
|
|
|
|
if (globals->thumb_glue_size != 0)
|
|
{
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
s = bfd_get_section_by_name
|
|
(globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
|
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
|
|
|
|
s->size = globals->thumb_glue_size;
|
|
s->contents = foo;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
record_arm_to_thumb_glue (struct bfd_link_info * link_info,
|
|
struct elf_link_hash_entry * h)
|
|
{
|
|
const char * name = h->root.root.string;
|
|
asection * s;
|
|
char * tmp_name;
|
|
struct elf_link_hash_entry * myh;
|
|
struct bfd_link_hash_entry * bh;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
bfd_vma val;
|
|
|
|
globals = elf32_arm_hash_table (link_info);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
s = bfd_get_section_by_name
|
|
(globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
|
|
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
|
|
|
|
BFD_ASSERT (tmp_name);
|
|
|
|
sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
|
|
|
|
myh = elf_link_hash_lookup
|
|
(&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
|
|
|
|
if (myh != NULL)
|
|
{
|
|
/* We've already seen this guy. */
|
|
free (tmp_name);
|
|
return;
|
|
}
|
|
|
|
/* The only trick here is using hash_table->arm_glue_size as the value.
|
|
Even though the section isn't allocated yet, this is where we will be
|
|
putting it. */
|
|
bh = NULL;
|
|
val = globals->arm_glue_size + 1;
|
|
_bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
|
|
tmp_name, BSF_GLOBAL, s, val,
|
|
NULL, TRUE, FALSE, &bh);
|
|
|
|
myh = (struct elf_link_hash_entry *) bh;
|
|
myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
|
|
myh->forced_local = 1;
|
|
|
|
free (tmp_name);
|
|
|
|
if ((link_info->shared || globals->root.is_relocatable_executable))
|
|
globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
|
|
else
|
|
globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
|
|
|
|
return;
|
|
}
|
|
|
|
static void
|
|
record_thumb_to_arm_glue (struct bfd_link_info *link_info,
|
|
struct elf_link_hash_entry *h)
|
|
{
|
|
const char *name = h->root.root.string;
|
|
asection *s;
|
|
char *tmp_name;
|
|
struct elf_link_hash_entry *myh;
|
|
struct bfd_link_hash_entry *bh;
|
|
struct elf32_arm_link_hash_table *hash_table;
|
|
bfd_vma val;
|
|
|
|
hash_table = elf32_arm_hash_table (link_info);
|
|
|
|
BFD_ASSERT (hash_table != NULL);
|
|
BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
|
|
|
|
s = bfd_get_section_by_name
|
|
(hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
|
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
|
|
+ strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
|
|
|
|
BFD_ASSERT (tmp_name);
|
|
|
|
sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
|
|
|
|
myh = elf_link_hash_lookup
|
|
(&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
|
|
|
|
if (myh != NULL)
|
|
{
|
|
/* We've already seen this guy. */
|
|
free (tmp_name);
|
|
return;
|
|
}
|
|
|
|
bh = NULL;
|
|
val = hash_table->thumb_glue_size + 1;
|
|
_bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
|
|
tmp_name, BSF_GLOBAL, s, val,
|
|
NULL, TRUE, FALSE, &bh);
|
|
|
|
/* If we mark it 'Thumb', the disassembler will do a better job. */
|
|
myh = (struct elf_link_hash_entry *) bh;
|
|
myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
|
|
myh->forced_local = 1;
|
|
|
|
free (tmp_name);
|
|
|
|
#define CHANGE_TO_ARM "__%s_change_to_arm"
|
|
#define BACK_FROM_ARM "__%s_back_from_arm"
|
|
|
|
/* Allocate another symbol to mark where we switch to Arm mode. */
|
|
tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
|
|
+ strlen (CHANGE_TO_ARM) + 1);
|
|
|
|
BFD_ASSERT (tmp_name);
|
|
|
|
sprintf (tmp_name, CHANGE_TO_ARM, name);
|
|
|
|
bh = NULL;
|
|
val = hash_table->thumb_glue_size + 4,
|
|
_bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
|
|
tmp_name, BSF_LOCAL, s, val,
|
|
NULL, TRUE, FALSE, &bh);
|
|
|
|
free (tmp_name);
|
|
|
|
hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
|
|
|
|
return;
|
|
}
|
|
|
|
/* Add the glue sections to ABFD. This function is called from the
|
|
linker scripts in ld/emultempl/{armelf}.em. */
|
|
|
|
bfd_boolean
|
|
bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
flagword flags;
|
|
asection *sec;
|
|
|
|
/* If we are only performing a partial
|
|
link do not bother adding the glue. */
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
|
|
|
|
if (sec == NULL)
|
|
{
|
|
/* Note: we do not include the flag SEC_LINKER_CREATED, as this
|
|
will prevent elf_link_input_bfd() from processing the contents
|
|
of this section. */
|
|
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
|
|
|
|
sec = bfd_make_section_with_flags (abfd,
|
|
ARM2THUMB_GLUE_SECTION_NAME,
|
|
flags);
|
|
|
|
if (sec == NULL
|
|
|| !bfd_set_section_alignment (abfd, sec, 2))
|
|
return FALSE;
|
|
|
|
/* Set the gc mark to prevent the section from being removed by garbage
|
|
collection, despite the fact that no relocs refer to this section. */
|
|
sec->gc_mark = 1;
|
|
}
|
|
|
|
sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
|
|
|
|
if (sec == NULL)
|
|
{
|
|
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
|
| SEC_CODE | SEC_READONLY;
|
|
|
|
sec = bfd_make_section_with_flags (abfd,
|
|
THUMB2ARM_GLUE_SECTION_NAME,
|
|
flags);
|
|
|
|
if (sec == NULL
|
|
|| !bfd_set_section_alignment (abfd, sec, 2))
|
|
return FALSE;
|
|
|
|
sec->gc_mark = 1;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Select a BFD to be used to hold the sections used by the glue code.
|
|
This function is called from the linker scripts in ld/emultempl/
|
|
{armelf/pe}.em */
|
|
|
|
bfd_boolean
|
|
bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
|
|
{
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
/* If we are only performing a partial link
|
|
do not bother getting a bfd to hold the glue. */
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
/* Make sure we don't attach the glue sections to a dynamic object. */
|
|
BFD_ASSERT (!(abfd->flags & DYNAMIC));
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
|
|
if (globals->bfd_of_glue_owner != NULL)
|
|
return TRUE;
|
|
|
|
/* Save the bfd for later use. */
|
|
globals->bfd_of_glue_owner = abfd;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void check_use_blx(struct elf32_arm_link_hash_table *globals)
|
|
{
|
|
if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2)
|
|
globals->use_blx = 1;
|
|
}
|
|
|
|
bfd_boolean
|
|
bfd_elf32_arm_process_before_allocation (bfd *abfd,
|
|
struct bfd_link_info *link_info,
|
|
int byteswap_code)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
|
Elf_Internal_Rela *irel, *irelend;
|
|
bfd_byte *contents = NULL;
|
|
|
|
asection *sec;
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
/* If we are only performing a partial link do not bother
|
|
to construct any glue. */
|
|
if (link_info->relocatable)
|
|
return TRUE;
|
|
|
|
/* Here we have a bfd that is to be included on the link. We have a hook
|
|
to do reloc rummaging, before section sizes are nailed down. */
|
|
globals = elf32_arm_hash_table (link_info);
|
|
check_use_blx (globals);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
if (byteswap_code && !bfd_big_endian (abfd))
|
|
{
|
|
_bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
|
|
abfd);
|
|
return FALSE;
|
|
}
|
|
globals->byteswap_code = byteswap_code;
|
|
|
|
/* Rummage around all the relocs and map the glue vectors. */
|
|
sec = abfd->sections;
|
|
|
|
if (sec == NULL)
|
|
return TRUE;
|
|
|
|
for (; sec != NULL; sec = sec->next)
|
|
{
|
|
if (sec->reloc_count == 0)
|
|
continue;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
|
|
/* Load the relocs. */
|
|
internal_relocs
|
|
= _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
|
|
(Elf_Internal_Rela *) NULL, FALSE);
|
|
|
|
if (internal_relocs == NULL)
|
|
goto error_return;
|
|
|
|
irelend = internal_relocs + sec->reloc_count;
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
|
{
|
|
long r_type;
|
|
unsigned long r_index;
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
r_type = ELF32_R_TYPE (irel->r_info);
|
|
r_index = ELF32_R_SYM (irel->r_info);
|
|
|
|
/* These are the only relocation types we care about. */
|
|
if ( r_type != R_ARM_PC24
|
|
&& r_type != R_ARM_PLT32
|
|
&& r_type != R_ARM_CALL
|
|
&& r_type != R_ARM_JUMP24
|
|
&& r_type != R_ARM_THM_CALL)
|
|
continue;
|
|
|
|
/* Get the section contents if we haven't done so already. */
|
|
if (contents == NULL)
|
|
{
|
|
/* Get cached copy if it exists. */
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
else
|
|
{
|
|
/* Go get them off disk. */
|
|
if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
|
goto error_return;
|
|
}
|
|
}
|
|
|
|
/* If the relocation is not against a symbol it cannot concern us. */
|
|
h = NULL;
|
|
|
|
/* We don't care about local symbols. */
|
|
if (r_index < symtab_hdr->sh_info)
|
|
continue;
|
|
|
|
/* This is an external symbol. */
|
|
r_index -= symtab_hdr->sh_info;
|
|
h = (struct elf_link_hash_entry *)
|
|
elf_sym_hashes (abfd)[r_index];
|
|
|
|
/* If the relocation is against a static symbol it must be within
|
|
the current section and so cannot be a cross ARM/Thumb relocation. */
|
|
if (h == NULL)
|
|
continue;
|
|
|
|
/* If the call will go through a PLT entry then we do not need
|
|
glue. */
|
|
if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
|
|
continue;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_PC24:
|
|
case R_ARM_PLT32:
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
/* This one is a call from arm code. We need to look up
|
|
the target of the call. If it is a thumb target, we
|
|
insert glue. */
|
|
if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
|
|
&& !(r_type == R_ARM_CALL && globals->use_blx))
|
|
record_arm_to_thumb_glue (link_info, h);
|
|
break;
|
|
|
|
case R_ARM_THM_CALL:
|
|
/* This one is a call from thumb code. We look
|
|
up the target of the call. If it is not a thumb
|
|
target, we insert glue. */
|
|
if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx)
|
|
record_thumb_to_arm_glue (link_info, h);
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
free (contents);
|
|
contents = NULL;
|
|
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
internal_relocs = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
error_return:
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
free (contents);
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
|
|
return FALSE;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Set target relocation values needed during linking. */
|
|
|
|
void
|
|
bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
|
|
int target1_is_rel,
|
|
char * target2_type,
|
|
int fix_v4bx,
|
|
int use_blx)
|
|
{
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
globals = elf32_arm_hash_table (link_info);
|
|
|
|
globals->target1_is_rel = target1_is_rel;
|
|
if (strcmp (target2_type, "rel") == 0)
|
|
globals->target2_reloc = R_ARM_REL32;
|
|
else if (strcmp (target2_type, "abs") == 0)
|
|
globals->target2_reloc = R_ARM_ABS32;
|
|
else if (strcmp (target2_type, "got-rel") == 0)
|
|
globals->target2_reloc = R_ARM_GOT_PREL;
|
|
else
|
|
{
|
|
_bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
|
|
target2_type);
|
|
}
|
|
globals->fix_v4bx = fix_v4bx;
|
|
globals->use_blx |= use_blx;
|
|
}
|
|
|
|
/* The thumb form of a long branch is a bit finicky, because the offset
|
|
encoding is split over two fields, each in it's own instruction. They
|
|
can occur in any order. So given a thumb form of long branch, and an
|
|
offset, insert the offset into the thumb branch and return finished
|
|
instruction.
|
|
|
|
It takes two thumb instructions to encode the target address. Each has
|
|
11 bits to invest. The upper 11 bits are stored in one (identified by
|
|
H-0.. see below), the lower 11 bits are stored in the other (identified
|
|
by H-1).
|
|
|
|
Combine together and shifted left by 1 (it's a half word address) and
|
|
there you have it.
|
|
|
|
Op: 1111 = F,
|
|
H-0, upper address-0 = 000
|
|
Op: 1111 = F,
|
|
H-1, lower address-0 = 800
|
|
|
|
They can be ordered either way, but the arm tools I've seen always put
|
|
the lower one first. It probably doesn't matter. krk@cygnus.com
|
|
|
|
XXX: Actually the order does matter. The second instruction (H-1)
|
|
moves the computed address into the PC, so it must be the second one
|
|
in the sequence. The problem, however is that whilst little endian code
|
|
stores the instructions in HI then LOW order, big endian code does the
|
|
reverse. nickc@cygnus.com. */
|
|
|
|
#define LOW_HI_ORDER 0xF800F000
|
|
#define HI_LOW_ORDER 0xF000F800
|
|
|
|
static insn32
|
|
insert_thumb_branch (insn32 br_insn, int rel_off)
|
|
{
|
|
unsigned int low_bits;
|
|
unsigned int high_bits;
|
|
|
|
BFD_ASSERT ((rel_off & 1) != 1);
|
|
|
|
rel_off >>= 1; /* Half word aligned address. */
|
|
low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
|
|
high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
|
|
|
|
if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
|
|
br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
|
|
else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
|
|
br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
|
|
else
|
|
/* FIXME: abort is probably not the right call. krk@cygnus.com */
|
|
abort (); /* Error - not a valid branch instruction form. */
|
|
|
|
return br_insn;
|
|
}
|
|
|
|
/* Thumb code calling an ARM function. */
|
|
|
|
static int
|
|
elf32_thumb_to_arm_stub (struct bfd_link_info * info,
|
|
const char * name,
|
|
bfd * input_bfd,
|
|
bfd * output_bfd,
|
|
asection * input_section,
|
|
bfd_byte * hit_data,
|
|
asection * sym_sec,
|
|
bfd_vma offset,
|
|
bfd_signed_vma addend,
|
|
bfd_vma val)
|
|
{
|
|
asection * s = 0;
|
|
bfd_vma my_offset;
|
|
unsigned long int tmp;
|
|
long int ret_offset;
|
|
struct elf_link_hash_entry * myh;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
myh = find_thumb_glue (info, name, input_bfd);
|
|
if (myh == NULL)
|
|
return FALSE;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
my_offset = myh->root.u.def.value;
|
|
|
|
s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
|
|
THUMB2ARM_GLUE_SECTION_NAME);
|
|
|
|
BFD_ASSERT (s != NULL);
|
|
BFD_ASSERT (s->contents != NULL);
|
|
BFD_ASSERT (s->output_section != NULL);
|
|
|
|
if ((my_offset & 0x01) == 0x01)
|
|
{
|
|
if (sym_sec != NULL
|
|
&& sym_sec->owner != NULL
|
|
&& !INTERWORK_FLAG (sym_sec->owner))
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%s): warning: interworking not enabled.\n"
|
|
" first occurrence: %B: thumb call to arm"),
|
|
sym_sec->owner, input_bfd, name);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
--my_offset;
|
|
myh->root.u.def.value = my_offset;
|
|
|
|
bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
|
|
s->contents + my_offset);
|
|
|
|
bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
|
|
s->contents + my_offset + 2);
|
|
|
|
ret_offset =
|
|
/* Address of destination of the stub. */
|
|
((bfd_signed_vma) val)
|
|
- ((bfd_signed_vma)
|
|
/* Offset from the start of the current section
|
|
to the start of the stubs. */
|
|
(s->output_offset
|
|
/* Offset of the start of this stub from the start of the stubs. */
|
|
+ my_offset
|
|
/* Address of the start of the current section. */
|
|
+ s->output_section->vma)
|
|
/* The branch instruction is 4 bytes into the stub. */
|
|
+ 4
|
|
/* ARM branches work from the pc of the instruction + 8. */
|
|
+ 8);
|
|
|
|
bfd_put_32 (output_bfd,
|
|
(bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
|
|
s->contents + my_offset + 4);
|
|
}
|
|
|
|
BFD_ASSERT (my_offset <= globals->thumb_glue_size);
|
|
|
|
/* Now go back and fix up the original BL insn to point to here. */
|
|
ret_offset =
|
|
/* Address of where the stub is located. */
|
|
(s->output_section->vma + s->output_offset + my_offset)
|
|
/* Address of where the BL is located. */
|
|
- (input_section->output_section->vma + input_section->output_offset
|
|
+ offset)
|
|
/* Addend in the relocation. */
|
|
- addend
|
|
/* Biassing for PC-relative addressing. */
|
|
- 8;
|
|
|
|
tmp = bfd_get_32 (input_bfd, hit_data
|
|
- input_section->vma);
|
|
|
|
bfd_put_32 (output_bfd,
|
|
(bfd_vma) insert_thumb_branch (tmp, ret_offset),
|
|
hit_data - input_section->vma);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Arm code calling a Thumb function. */
|
|
|
|
static int
|
|
elf32_arm_to_thumb_stub (struct bfd_link_info * info,
|
|
const char * name,
|
|
bfd * input_bfd,
|
|
bfd * output_bfd,
|
|
asection * input_section,
|
|
bfd_byte * hit_data,
|
|
asection * sym_sec,
|
|
bfd_vma offset,
|
|
bfd_signed_vma addend,
|
|
bfd_vma val)
|
|
{
|
|
unsigned long int tmp;
|
|
bfd_vma my_offset;
|
|
asection * s;
|
|
long int ret_offset;
|
|
struct elf_link_hash_entry * myh;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
myh = find_arm_glue (info, name, input_bfd);
|
|
if (myh == NULL)
|
|
return FALSE;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
BFD_ASSERT (globals != NULL);
|
|
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
|
|
|
|
my_offset = myh->root.u.def.value;
|
|
s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
|
|
ARM2THUMB_GLUE_SECTION_NAME);
|
|
BFD_ASSERT (s != NULL);
|
|
BFD_ASSERT (s->contents != NULL);
|
|
BFD_ASSERT (s->output_section != NULL);
|
|
|
|
if ((my_offset & 0x01) == 0x01)
|
|
{
|
|
if (sym_sec != NULL
|
|
&& sym_sec->owner != NULL
|
|
&& !INTERWORK_FLAG (sym_sec->owner))
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%s): warning: interworking not enabled.\n"
|
|
" first occurrence: %B: arm call to thumb"),
|
|
sym_sec->owner, input_bfd, name);
|
|
}
|
|
|
|
--my_offset;
|
|
myh->root.u.def.value = my_offset;
|
|
|
|
if ((info->shared || globals->root.is_relocatable_executable))
|
|
{
|
|
/* For relocatable objects we can't use absolute addresses,
|
|
so construct the address from a relative offset. */
|
|
/* TODO: If the offset is small it's probably worth
|
|
constructing the address with adds. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn,
|
|
s->contents + my_offset);
|
|
bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn,
|
|
s->contents + my_offset + 4);
|
|
bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
|
|
s->contents + my_offset + 8);
|
|
/* Adjust the offset by 4 for the position of the add,
|
|
and 8 for the pipeline offset. */
|
|
ret_offset = (val - (s->output_offset
|
|
+ s->output_section->vma
|
|
+ my_offset + 12))
|
|
| 1;
|
|
bfd_put_32 (output_bfd, ret_offset,
|
|
s->contents + my_offset + 12);
|
|
}
|
|
else
|
|
{
|
|
bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
|
|
s->contents + my_offset);
|
|
|
|
bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
|
|
s->contents + my_offset + 4);
|
|
|
|
/* It's a thumb address. Add the low order bit. */
|
|
bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
|
|
s->contents + my_offset + 8);
|
|
}
|
|
}
|
|
|
|
BFD_ASSERT (my_offset <= globals->arm_glue_size);
|
|
|
|
tmp = bfd_get_32 (input_bfd, hit_data);
|
|
tmp = tmp & 0xFF000000;
|
|
|
|
/* Somehow these are both 4 too far, so subtract 8. */
|
|
ret_offset = (s->output_offset
|
|
+ my_offset
|
|
+ s->output_section->vma
|
|
- (input_section->output_offset
|
|
+ input_section->output_section->vma
|
|
+ offset + addend)
|
|
- 8);
|
|
|
|
tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
|
|
|
|
bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Some relocations map to different relocations depending on the
|
|
target. Return the real relocation. */
|
|
static int
|
|
arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
|
|
int r_type)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_TARGET1:
|
|
if (globals->target1_is_rel)
|
|
return R_ARM_REL32;
|
|
else
|
|
return R_ARM_ABS32;
|
|
|
|
case R_ARM_TARGET2:
|
|
return globals->target2_reloc;
|
|
|
|
default:
|
|
return r_type;
|
|
}
|
|
}
|
|
|
|
/* Return the base VMA address which should be subtracted from real addresses
|
|
when resolving @dtpoff relocation.
|
|
This is PT_TLS segment p_vaddr. */
|
|
|
|
static bfd_vma
|
|
dtpoff_base (struct bfd_link_info *info)
|
|
{
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
|
if (elf_hash_table (info)->tls_sec == NULL)
|
|
return 0;
|
|
return elf_hash_table (info)->tls_sec->vma;
|
|
}
|
|
|
|
/* Return the relocation value for @tpoff relocation
|
|
if STT_TLS virtual address is ADDRESS. */
|
|
|
|
static bfd_vma
|
|
tpoff (struct bfd_link_info *info, bfd_vma address)
|
|
{
|
|
struct elf_link_hash_table *htab = elf_hash_table (info);
|
|
bfd_vma base;
|
|
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
|
if (htab->tls_sec == NULL)
|
|
return 0;
|
|
base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
|
|
return address - htab->tls_sec->vma + base;
|
|
}
|
|
|
|
/* Perform a relocation as part of a final link. */
|
|
|
|
static bfd_reloc_status_type
|
|
elf32_arm_final_link_relocate (reloc_howto_type * howto,
|
|
bfd * input_bfd,
|
|
bfd * output_bfd,
|
|
asection * input_section,
|
|
bfd_byte * contents,
|
|
Elf_Internal_Rela * rel,
|
|
bfd_vma value,
|
|
struct bfd_link_info * info,
|
|
asection * sym_sec,
|
|
const char * sym_name,
|
|
int sym_flags,
|
|
struct elf_link_hash_entry * h,
|
|
bfd_boolean * unresolved_reloc_p)
|
|
{
|
|
unsigned long r_type = howto->type;
|
|
unsigned long r_symndx;
|
|
bfd_byte * hit_data = contents + rel->r_offset;
|
|
bfd * dynobj = NULL;
|
|
Elf_Internal_Shdr * symtab_hdr;
|
|
struct elf_link_hash_entry ** sym_hashes;
|
|
bfd_vma * local_got_offsets;
|
|
asection * sgot = NULL;
|
|
asection * splt = NULL;
|
|
asection * sreloc = NULL;
|
|
bfd_vma addend;
|
|
bfd_signed_vma signed_addend;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
/* Some relocation type map to different relocations depending on the
|
|
target. We pick the right one here. */
|
|
r_type = arm_real_reloc_type (globals, r_type);
|
|
if (r_type != howto->type)
|
|
howto = elf32_arm_howto_from_type (r_type);
|
|
|
|
/* If the start address has been set, then set the EF_ARM_HASENTRY
|
|
flag. Setting this more than once is redundant, but the cost is
|
|
not too high, and it keeps the code simple.
|
|
|
|
The test is done here, rather than somewhere else, because the
|
|
start address is only set just before the final link commences.
|
|
|
|
Note - if the user deliberately sets a start address of 0, the
|
|
flag will not be set. */
|
|
if (bfd_get_start_address (output_bfd) != 0)
|
|
elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
if (dynobj)
|
|
{
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
|
}
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
|
|
if (globals->use_rel)
|
|
{
|
|
addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
|
|
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
signed_addend = -1;
|
|
signed_addend &= ~ howto->src_mask;
|
|
signed_addend |= addend;
|
|
}
|
|
else
|
|
signed_addend = addend;
|
|
}
|
|
else
|
|
addend = signed_addend = rel->r_addend;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_NONE:
|
|
/* We don't need to find a value for this symbol. It's just a
|
|
marker. */
|
|
*unresolved_reloc_p = FALSE;
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_PC24:
|
|
case R_ARM_ABS32:
|
|
case R_ARM_REL32:
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
case R_ARM_XPC25:
|
|
case R_ARM_PREL31:
|
|
case R_ARM_PLT32:
|
|
/* r_symndx will be zero only for relocs against symbols
|
|
from removed linkonce sections, or sections discarded by
|
|
a linker script. */
|
|
if (r_symndx == 0)
|
|
return bfd_reloc_ok;
|
|
|
|
/* Handle relocations which should use the PLT entry. ABS32/REL32
|
|
will use the symbol's value, which may point to a PLT entry, but we
|
|
don't need to handle that here. If we created a PLT entry, all
|
|
branches in this object should go to it. */
|
|
if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
|
|
&& h != NULL
|
|
&& splt != NULL
|
|
&& h->plt.offset != (bfd_vma) -1)
|
|
{
|
|
/* If we've created a .plt section, and assigned a PLT entry to
|
|
this function, it should not be known to bind locally. If
|
|
it were, we would have cleared the PLT entry. */
|
|
BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
|
|
|
|
value = (splt->output_section->vma
|
|
+ splt->output_offset
|
|
+ h->plt.offset);
|
|
*unresolved_reloc_p = FALSE;
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
}
|
|
|
|
/* When generating a shared object or relocatable executable, these
|
|
relocations are copied into the output file to be resolved at
|
|
run time. */
|
|
if ((info->shared || globals->root.is_relocatable_executable)
|
|
&& (input_section->flags & SEC_ALLOC)
|
|
&& (r_type != R_ARM_REL32
|
|
|| !SYMBOL_CALLS_LOCAL (info, h))
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& r_type != R_ARM_PC24
|
|
&& r_type != R_ARM_CALL
|
|
&& r_type != R_ARM_JUMP24
|
|
&& r_type != R_ARM_PREL31
|
|
&& r_type != R_ARM_PLT32)
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
bfd_boolean skip, relocate;
|
|
|
|
*unresolved_reloc_p = FALSE;
|
|
|
|
if (sreloc == NULL)
|
|
{
|
|
const char * name;
|
|
|
|
name = (bfd_elf_string_from_elf_section
|
|
(input_bfd,
|
|
elf_elfheader (input_bfd)->e_shstrndx,
|
|
elf_section_data (input_section)->rel_hdr.sh_name));
|
|
if (name == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
BFD_ASSERT (strncmp (name, ".rel", 4) == 0
|
|
&& strcmp (bfd_get_section_name (input_bfd,
|
|
input_section),
|
|
name + 4) == 0);
|
|
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
|
BFD_ASSERT (sreloc != NULL);
|
|
}
|
|
|
|
skip = FALSE;
|
|
relocate = FALSE;
|
|
|
|
outrel.r_offset =
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
|
rel->r_offset);
|
|
if (outrel.r_offset == (bfd_vma) -1)
|
|
skip = TRUE;
|
|
else if (outrel.r_offset == (bfd_vma) -2)
|
|
skip = TRUE, relocate = TRUE;
|
|
outrel.r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
|
|
if (skip)
|
|
memset (&outrel, 0, sizeof outrel);
|
|
else if (h != NULL
|
|
&& h->dynindx != -1
|
|
&& (!info->shared
|
|
|| !info->symbolic
|
|
|| !h->def_regular))
|
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
|
else
|
|
{
|
|
int symbol;
|
|
|
|
/* This symbol is local, or marked to become local. */
|
|
relocate = TRUE;
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= 1;
|
|
if (globals->symbian_p)
|
|
{
|
|
/* On Symbian OS, the data segment and text segement
|
|
can be relocated independently. Therefore, we
|
|
must indicate the segment to which this
|
|
relocation is relative. The BPABI allows us to
|
|
use any symbol in the right segment; we just use
|
|
the section symbol as it is convenient. (We
|
|
cannot use the symbol given by "h" directly as it
|
|
will not appear in the dynamic symbol table.) */
|
|
if (sym_sec)
|
|
symbol = elf_section_data (sym_sec->output_section)->dynindx;
|
|
else
|
|
symbol = elf_section_data (input_section->output_section)->dynindx;
|
|
BFD_ASSERT (symbol != 0);
|
|
}
|
|
else
|
|
/* On SVR4-ish systems, the dynamic loader cannot
|
|
relocate the text and data segments independently,
|
|
so the symbol does not matter. */
|
|
symbol = 0;
|
|
outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
|
|
}
|
|
|
|
loc = sreloc->contents;
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
|
|
/* If this reloc is against an external symbol, we do not want to
|
|
fiddle with the addend. Otherwise, we need to include the symbol
|
|
value so that it becomes an addend for the dynamic reloc. */
|
|
if (! relocate)
|
|
return bfd_reloc_ok;
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
}
|
|
else switch (r_type)
|
|
{
|
|
case R_ARM_XPC25: /* Arm BLX instruction. */
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
case R_ARM_PC24: /* Arm B/BL instruction */
|
|
case R_ARM_PLT32:
|
|
if (r_type == R_ARM_XPC25)
|
|
{
|
|
/* Check for Arm calling Arm function. */
|
|
/* FIXME: Should we translate the instruction into a BL
|
|
instruction instead ? */
|
|
if (sym_flags != STT_ARM_TFUNC)
|
|
(*_bfd_error_handler)
|
|
(_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
|
|
input_bfd,
|
|
h ? h->root.root.string : "(local)");
|
|
}
|
|
else if (r_type != R_ARM_CALL || !globals->use_blx)
|
|
{
|
|
/* Check for Arm calling Thumb function. */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
{
|
|
elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
|
|
output_bfd, input_section,
|
|
hit_data, sym_sec, rel->r_offset,
|
|
signed_addend, value);
|
|
return bfd_reloc_ok;
|
|
}
|
|
}
|
|
|
|
/* The ARM ELF ABI says that this reloc is computed as: S - P + A
|
|
where:
|
|
S is the address of the symbol in the relocation.
|
|
P is address of the instruction being relocated.
|
|
A is the addend (extracted from the instruction) in bytes.
|
|
|
|
S is held in 'value'.
|
|
P is the base address of the section containing the
|
|
instruction plus the offset of the reloc into that
|
|
section, ie:
|
|
(input_section->output_section->vma +
|
|
input_section->output_offset +
|
|
rel->r_offset).
|
|
A is the addend, converted into bytes, ie:
|
|
(signed_addend * 4)
|
|
|
|
Note: None of these operations have knowledge of the pipeline
|
|
size of the processor, thus it is up to the assembler to
|
|
encode this information into the addend. */
|
|
value -= (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
value -= rel->r_offset;
|
|
if (globals->use_rel)
|
|
value += (signed_addend << howto->size);
|
|
else
|
|
/* RELA addends do not have to be adjusted by howto->size. */
|
|
value += signed_addend;
|
|
|
|
signed_addend = value;
|
|
signed_addend >>= howto->rightshift;
|
|
|
|
/* It is not an error for an undefined weak reference to be
|
|
out of range. Any program that branches to such a symbol
|
|
is going to crash anyway, so there is no point worrying
|
|
about getting the destination exactly right. */
|
|
if (! h || h->root.type != bfd_link_hash_undefweak)
|
|
{
|
|
/* Perform a signed range check. */
|
|
if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
|
|
|| signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
|
|
return bfd_reloc_overflow;
|
|
}
|
|
|
|
addend = (value & 2);
|
|
|
|
value = (signed_addend & howto->dst_mask)
|
|
| (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
|
|
|
|
/* Set the H bit in the BLX instruction. */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
{
|
|
if (addend)
|
|
value |= (1 << 24);
|
|
else
|
|
value &= ~(bfd_vma)(1 << 24);
|
|
}
|
|
if (r_type == R_ARM_CALL)
|
|
{
|
|
/* Select the correct instruction (BL or BLX). */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= (1 << 28);
|
|
else
|
|
{
|
|
value &= ~(bfd_vma)(1 << 28);
|
|
value |= (1 << 24);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case R_ARM_ABS32:
|
|
value += addend;
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= 1;
|
|
break;
|
|
|
|
case R_ARM_REL32:
|
|
value -= (input_section->output_section->vma
|
|
+ input_section->output_offset + rel->r_offset);
|
|
value += addend;
|
|
break;
|
|
|
|
case R_ARM_PREL31:
|
|
value -= (input_section->output_section->vma
|
|
+ input_section->output_offset + rel->r_offset);
|
|
value += signed_addend;
|
|
if (! h || h->root.type != bfd_link_hash_undefweak)
|
|
{
|
|
/* Check for overflow */
|
|
if ((value ^ (value >> 1)) & (1 << 30))
|
|
return bfd_reloc_overflow;
|
|
}
|
|
value &= 0x7fffffff;
|
|
value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= 1;
|
|
break;
|
|
}
|
|
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_ABS8:
|
|
value += addend;
|
|
if ((long) value > 0x7f || (long) value < -0x80)
|
|
return bfd_reloc_overflow;
|
|
|
|
bfd_put_8 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_ABS16:
|
|
value += addend;
|
|
|
|
if ((long) value > 0x7fff || (long) value < -0x8000)
|
|
return bfd_reloc_overflow;
|
|
|
|
bfd_put_16 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_ABS12:
|
|
/* Support ldr and str instruction for the arm */
|
|
/* Also thumb b (unconditional branch). ??? Really? */
|
|
value += addend;
|
|
|
|
if ((long) value > 0x7ff || (long) value < -0x800)
|
|
return bfd_reloc_overflow;
|
|
|
|
value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_THM_ABS5:
|
|
/* Support ldr and str instructions for the thumb. */
|
|
if (globals->use_rel)
|
|
{
|
|
/* Need to refetch addend. */
|
|
addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
|
|
/* ??? Need to determine shift amount from operand size. */
|
|
addend >>= howto->rightshift;
|
|
}
|
|
value += addend;
|
|
|
|
/* ??? Isn't value unsigned? */
|
|
if ((long) value > 0x1f || (long) value < -0x10)
|
|
return bfd_reloc_overflow;
|
|
|
|
/* ??? Value needs to be properly shifted into place first. */
|
|
value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
|
|
bfd_put_16 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_THM_XPC22:
|
|
case R_ARM_THM_CALL:
|
|
/* Thumb BL (branch long instruction). */
|
|
{
|
|
bfd_vma relocation;
|
|
bfd_boolean overflow = FALSE;
|
|
bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
|
|
bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
|
|
bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
|
|
bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
|
|
bfd_vma check;
|
|
bfd_signed_vma signed_check;
|
|
|
|
/* Need to refetch the addend and squish the two 11 bit pieces
|
|
together. */
|
|
if (globals->use_rel)
|
|
{
|
|
bfd_vma upper = upper_insn & 0x7ff;
|
|
bfd_vma lower = lower_insn & 0x7ff;
|
|
upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
|
|
addend = (upper << 12) | (lower << 1);
|
|
signed_addend = addend;
|
|
}
|
|
|
|
if (r_type == R_ARM_THM_XPC22)
|
|
{
|
|
/* Check for Thumb to Thumb call. */
|
|
/* FIXME: Should we translate the instruction into a BL
|
|
instruction instead ? */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
(*_bfd_error_handler)
|
|
(_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
|
|
input_bfd,
|
|
h ? h->root.root.string : "(local)");
|
|
}
|
|
else
|
|
{
|
|
/* If it is not a call to Thumb, assume call to Arm.
|
|
If it is a call relative to a section name, then it is not a
|
|
function call at all, but rather a long jump. Calls through
|
|
the PLT do not require stubs. */
|
|
if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
|
|
&& (h == NULL || splt == NULL
|
|
|| h->plt.offset == (bfd_vma) -1))
|
|
{
|
|
if (globals->use_blx)
|
|
{
|
|
/* Convert BL to BLX. */
|
|
lower_insn = (lower_insn & ~0x1000) | 0x0800;
|
|
}
|
|
else if (elf32_thumb_to_arm_stub
|
|
(info, sym_name, input_bfd, output_bfd, input_section,
|
|
hit_data, sym_sec, rel->r_offset, signed_addend, value))
|
|
return bfd_reloc_ok;
|
|
else
|
|
return bfd_reloc_dangerous;
|
|
}
|
|
else if (sym_flags == STT_ARM_TFUNC && globals->use_blx)
|
|
{
|
|
/* Make sure this is a BL. */
|
|
lower_insn |= 0x1800;
|
|
}
|
|
}
|
|
|
|
/* Handle calls via the PLT. */
|
|
if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
|
|
{
|
|
value = (splt->output_section->vma
|
|
+ splt->output_offset
|
|
+ h->plt.offset);
|
|
if (globals->use_blx)
|
|
{
|
|
/* If the Thumb BLX instruction is available, convert the
|
|
BL to a BLX instruction to call the ARM-mode PLT entry. */
|
|
lower_insn = (lower_insn & ~0x1000) | 0x0800;
|
|
}
|
|
else
|
|
/* Target the Thumb stub before the ARM PLT entry. */
|
|
value -= PLT_THUMB_STUB_SIZE;
|
|
*unresolved_reloc_p = FALSE;
|
|
}
|
|
|
|
relocation = value + signed_addend;
|
|
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
|
|
check = relocation >> howto->rightshift;
|
|
|
|
/* If this is a signed value, the rightshift just dropped
|
|
leading 1 bits (assuming twos complement). */
|
|
if ((bfd_signed_vma) relocation >= 0)
|
|
signed_check = check;
|
|
else
|
|
signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
|
|
|
|
/* Assumes two's complement. */
|
|
if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
|
|
overflow = TRUE;
|
|
|
|
if ((lower_insn & 0x1800) == 0x0800)
|
|
/* For a BLX instruction, make sure that the relocation is rounded up
|
|
to a word boundary. This follows the semantics of the instruction
|
|
which specifies that bit 1 of the target address will come from bit
|
|
1 of the base address. */
|
|
relocation = (relocation + 2) & ~ 3;
|
|
|
|
/* Put RELOCATION back into the insn. */
|
|
upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
|
|
lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
|
|
|
|
/* Put the relocated value back in the object file: */
|
|
bfd_put_16 (input_bfd, upper_insn, hit_data);
|
|
bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
|
|
|
|
return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
|
|
}
|
|
break;
|
|
|
|
case R_ARM_THM_JUMP24:
|
|
/* Thumb32 unconditional branch instruction. */
|
|
{
|
|
bfd_vma relocation;
|
|
bfd_boolean overflow = FALSE;
|
|
bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
|
|
bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
|
|
bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
|
|
bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
|
|
bfd_vma check;
|
|
bfd_signed_vma signed_check;
|
|
|
|
/* Need to refetch the addend, reconstruct the top three bits, and glue the
|
|
two pieces together. */
|
|
if (globals->use_rel)
|
|
{
|
|
bfd_vma S = (upper_insn & 0x0400) >> 10;
|
|
bfd_vma hi = (upper_insn & 0x03ff);
|
|
bfd_vma I1 = (lower_insn & 0x2000) >> 13;
|
|
bfd_vma I2 = (lower_insn & 0x0800) >> 11;
|
|
bfd_vma lo = (lower_insn & 0x07ff);
|
|
|
|
I1 = !(I1 ^ S);
|
|
I2 = !(I2 ^ S);
|
|
S = !S;
|
|
|
|
signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
|
|
signed_addend -= (1 << 24); /* Sign extend. */
|
|
}
|
|
|
|
/* ??? Should handle interworking? GCC might someday try to
|
|
use this for tail calls. */
|
|
|
|
relocation = value + signed_addend;
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
|
|
check = relocation >> howto->rightshift;
|
|
|
|
/* If this is a signed value, the rightshift just dropped
|
|
leading 1 bits (assuming twos complement). */
|
|
if ((bfd_signed_vma) relocation >= 0)
|
|
signed_check = check;
|
|
else
|
|
signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
|
|
|
|
/* Assumes two's complement. */
|
|
if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
|
|
overflow = TRUE;
|
|
|
|
/* Put RELOCATION back into the insn. */
|
|
{
|
|
bfd_vma S = (relocation & 0x01000000) >> 24;
|
|
bfd_vma I1 = (relocation & 0x00800000) >> 23;
|
|
bfd_vma I2 = (relocation & 0x00400000) >> 22;
|
|
bfd_vma hi = (relocation & 0x003ff000) >> 12;
|
|
bfd_vma lo = (relocation & 0x00000ffe) >> 1;
|
|
|
|
I1 = !(I1 ^ S);
|
|
I2 = !(I2 ^ S);
|
|
|
|
upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
|
|
lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
|
|
}
|
|
|
|
/* Put the relocated value back in the object file: */
|
|
bfd_put_16 (input_bfd, upper_insn, hit_data);
|
|
bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
|
|
|
|
return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
|
|
}
|
|
|
|
case R_ARM_THM_JUMP19:
|
|
/* Thumb32 conditional branch instruction. */
|
|
{
|
|
bfd_vma relocation;
|
|
bfd_boolean overflow = FALSE;
|
|
bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
|
|
bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
|
|
bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
|
|
bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
|
|
bfd_vma check;
|
|
bfd_signed_vma signed_check;
|
|
|
|
/* Need to refetch the addend, reconstruct the top three bits,
|
|
and squish the two 11 bit pieces together. */
|
|
if (globals->use_rel)
|
|
{
|
|
bfd_vma S = (upper_insn & 0x0400) >> 10;
|
|
bfd_vma upper = (upper_insn & 0x001f);
|
|
bfd_vma J1 = (lower_insn & 0x2000) >> 13;
|
|
bfd_vma J2 = (lower_insn & 0x0800) >> 11;
|
|
bfd_vma lower = (lower_insn & 0x07ff);
|
|
|
|
upper |= J2 << 6;
|
|
upper |= J1 << 7;
|
|
upper |= ~S << 8;
|
|
upper -= 0x0100; /* Sign extend. */
|
|
|
|
addend = (upper << 12) | (lower << 1);
|
|
signed_addend = addend;
|
|
}
|
|
|
|
/* ??? Should handle interworking? GCC might someday try to
|
|
use this for tail calls. */
|
|
|
|
relocation = value + signed_addend;
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
|
|
check = relocation >> howto->rightshift;
|
|
|
|
/* If this is a signed value, the rightshift just dropped
|
|
leading 1 bits (assuming twos complement). */
|
|
if ((bfd_signed_vma) relocation >= 0)
|
|
signed_check = check;
|
|
else
|
|
signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
|
|
|
|
/* Assumes two's complement. */
|
|
if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
|
|
overflow = TRUE;
|
|
|
|
/* Put RELOCATION back into the insn. */
|
|
{
|
|
bfd_vma S = (relocation & 0x00100000) >> 20;
|
|
bfd_vma J2 = (relocation & 0x00080000) >> 19;
|
|
bfd_vma J1 = (relocation & 0x00040000) >> 18;
|
|
bfd_vma hi = (relocation & 0x0003f000) >> 12;
|
|
bfd_vma lo = (relocation & 0x00000ffe) >> 1;
|
|
|
|
upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
|
|
lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
|
|
}
|
|
|
|
/* Put the relocated value back in the object file: */
|
|
bfd_put_16 (input_bfd, upper_insn, hit_data);
|
|
bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
|
|
|
|
return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
|
|
}
|
|
|
|
case R_ARM_THM_JUMP11:
|
|
case R_ARM_THM_JUMP8:
|
|
case R_ARM_THM_JUMP6:
|
|
/* Thumb B (branch) instruction). */
|
|
{
|
|
bfd_signed_vma relocation;
|
|
bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
|
|
bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
|
|
bfd_signed_vma signed_check;
|
|
|
|
/* CZB cannot jump backward. */
|
|
if (r_type == R_ARM_THM_JUMP6)
|
|
reloc_signed_min = 0;
|
|
|
|
if (globals->use_rel)
|
|
{
|
|
/* Need to refetch addend. */
|
|
addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
signed_addend = -1;
|
|
signed_addend &= ~ howto->src_mask;
|
|
signed_addend |= addend;
|
|
}
|
|
else
|
|
signed_addend = addend;
|
|
/* The value in the insn has been right shifted. We need to
|
|
undo this, so that we can perform the address calculation
|
|
in terms of bytes. */
|
|
signed_addend <<= howto->rightshift;
|
|
}
|
|
relocation = value + signed_addend;
|
|
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
|
|
relocation >>= howto->rightshift;
|
|
signed_check = relocation;
|
|
|
|
if (r_type == R_ARM_THM_JUMP6)
|
|
relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
|
|
else
|
|
relocation &= howto->dst_mask;
|
|
relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
|
|
|
|
bfd_put_16 (input_bfd, relocation, hit_data);
|
|
|
|
/* Assumes two's complement. */
|
|
if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
|
|
return bfd_reloc_overflow;
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
case R_ARM_ALU_PCREL7_0:
|
|
case R_ARM_ALU_PCREL15_8:
|
|
case R_ARM_ALU_PCREL23_15:
|
|
{
|
|
bfd_vma insn;
|
|
bfd_vma relocation;
|
|
|
|
insn = bfd_get_32 (input_bfd, hit_data);
|
|
if (globals->use_rel)
|
|
{
|
|
/* Extract the addend. */
|
|
addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
|
|
signed_addend = addend;
|
|
}
|
|
relocation = value + signed_addend;
|
|
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
insn = (insn & ~0xfff)
|
|
| ((howto->bitpos << 7) & 0xf00)
|
|
| ((relocation >> howto->bitpos) & 0xff);
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
}
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_GNU_VTINHERIT:
|
|
case R_ARM_GNU_VTENTRY:
|
|
return bfd_reloc_ok;
|
|
|
|
case R_ARM_GOTOFF32:
|
|
/* Relocation is relative to the start of the
|
|
global offset table. */
|
|
|
|
BFD_ASSERT (sgot != NULL);
|
|
if (sgot == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
/* If we are addressing a Thumb function, we need to adjust the
|
|
address by one, so that attempts to call the function pointer will
|
|
correctly interpret it as Thumb code. */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value += 1;
|
|
|
|
/* Note that sgot->output_offset is not involved in this
|
|
calculation. We always want the start of .got. If we
|
|
define _GLOBAL_OFFSET_TABLE in a different way, as is
|
|
permitted by the ABI, we might have to change this
|
|
calculation. */
|
|
value -= sgot->output_section->vma;
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
|
|
case R_ARM_GOTPC:
|
|
/* Use global offset table as symbol value. */
|
|
BFD_ASSERT (sgot != NULL);
|
|
|
|
if (sgot == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
*unresolved_reloc_p = FALSE;
|
|
value = sgot->output_section->vma;
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
|
|
case R_ARM_GOT32:
|
|
case R_ARM_GOT_PREL:
|
|
/* Relocation is to the entry for this symbol in the
|
|
global offset table. */
|
|
if (sgot == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
if (h != NULL)
|
|
{
|
|
bfd_vma off;
|
|
bfd_boolean dyn;
|
|
|
|
off = h->got.offset;
|
|
BFD_ASSERT (off != (bfd_vma) -1);
|
|
dyn = globals->root.dynamic_sections_created;
|
|
|
|
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
|
|| (info->shared
|
|
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
|
|| (ELF_ST_VISIBILITY (h->other)
|
|
&& h->root.type == bfd_link_hash_undefweak))
|
|
{
|
|
/* This is actually a static link, or it is a -Bsymbolic link
|
|
and the symbol is defined locally. We must initialize this
|
|
entry in the global offset table. Since the offset must
|
|
always be a multiple of 4, we use the least significant bit
|
|
to record whether we have initialized it already.
|
|
|
|
When doing a dynamic link, we create a .rel.got relocation
|
|
entry to initialize the value. This is done in the
|
|
finish_dynamic_symbol routine. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
/* If we are addressing a Thumb function, we need to
|
|
adjust the address by one, so that attempts to
|
|
call the function pointer will correctly
|
|
interpret it as Thumb code. */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= 1;
|
|
|
|
bfd_put_32 (output_bfd, value, sgot->contents + off);
|
|
h->got.offset |= 1;
|
|
}
|
|
}
|
|
else
|
|
*unresolved_reloc_p = FALSE;
|
|
|
|
value = sgot->output_offset + off;
|
|
}
|
|
else
|
|
{
|
|
bfd_vma off;
|
|
|
|
BFD_ASSERT (local_got_offsets != NULL &&
|
|
local_got_offsets[r_symndx] != (bfd_vma) -1);
|
|
|
|
off = local_got_offsets[r_symndx];
|
|
|
|
/* The offset must always be a multiple of 4. We use the
|
|
least significant bit to record whether we have already
|
|
generated the necessary reloc. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
/* If we are addressing a Thumb function, we need to
|
|
adjust the address by one, so that attempts to
|
|
call the function pointer will correctly
|
|
interpret it as Thumb code. */
|
|
if (sym_flags == STT_ARM_TFUNC)
|
|
value |= 1;
|
|
|
|
bfd_put_32 (output_bfd, value, sgot->contents + off);
|
|
|
|
if (info->shared)
|
|
{
|
|
asection * srelgot;
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
|
|
srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
|
|
BFD_ASSERT (srelgot != NULL);
|
|
|
|
outrel.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ off);
|
|
outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
|
|
loc = srelgot->contents;
|
|
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
}
|
|
|
|
local_got_offsets[r_symndx] |= 1;
|
|
}
|
|
|
|
value = sgot->output_offset + off;
|
|
}
|
|
if (r_type != R_ARM_GOT32)
|
|
value += sgot->output_section->vma;
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
|
|
case R_ARM_TLS_LDO32:
|
|
value = value - dtpoff_base (info);
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value, (bfd_vma) 0);
|
|
|
|
case R_ARM_TLS_LDM32:
|
|
{
|
|
bfd_vma off;
|
|
|
|
if (globals->sgot == NULL)
|
|
abort ();
|
|
|
|
off = globals->tls_ldm_got.offset;
|
|
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
/* If we don't know the module number, create a relocation
|
|
for it. */
|
|
if (info->shared)
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
|
|
if (globals->srelgot == NULL)
|
|
abort ();
|
|
|
|
outrel.r_offset = (globals->sgot->output_section->vma
|
|
+ globals->sgot->output_offset + off);
|
|
outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
|
|
|
|
bfd_put_32 (output_bfd, 0, globals->sgot->contents + off);
|
|
|
|
loc = globals->srelgot->contents;
|
|
loc += globals->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
}
|
|
else
|
|
bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
|
|
|
|
globals->tls_ldm_got.offset |= 1;
|
|
}
|
|
|
|
value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
|
|
- (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
}
|
|
|
|
case R_ARM_TLS_GD32:
|
|
case R_ARM_TLS_IE32:
|
|
{
|
|
bfd_vma off;
|
|
int indx;
|
|
char tls_type;
|
|
|
|
if (globals->sgot == NULL)
|
|
abort ();
|
|
|
|
indx = 0;
|
|
if (h != NULL)
|
|
{
|
|
bfd_boolean dyn;
|
|
dyn = globals->root.dynamic_sections_created;
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
|
&& (!info->shared
|
|
|| !SYMBOL_REFERENCES_LOCAL (info, h)))
|
|
{
|
|
*unresolved_reloc_p = FALSE;
|
|
indx = h->dynindx;
|
|
}
|
|
off = h->got.offset;
|
|
tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
|
|
}
|
|
else
|
|
{
|
|
if (local_got_offsets == NULL)
|
|
abort ();
|
|
off = local_got_offsets[r_symndx];
|
|
tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
|
|
}
|
|
|
|
if (tls_type == GOT_UNKNOWN)
|
|
abort ();
|
|
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
bfd_boolean need_relocs = FALSE;
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc = NULL;
|
|
int cur_off = off;
|
|
|
|
/* The GOT entries have not been initialized yet. Do it
|
|
now, and emit any relocations. If both an IE GOT and a
|
|
GD GOT are necessary, we emit the GD first. */
|
|
|
|
if ((info->shared || indx != 0)
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
need_relocs = TRUE;
|
|
if (globals->srelgot == NULL)
|
|
abort ();
|
|
loc = globals->srelgot->contents;
|
|
loc += globals->srelgot->reloc_count * sizeof (Elf32_External_Rel);
|
|
}
|
|
|
|
if (tls_type & GOT_TLS_GD)
|
|
{
|
|
if (need_relocs)
|
|
{
|
|
outrel.r_offset = (globals->sgot->output_section->vma
|
|
+ globals->sgot->output_offset + cur_off);
|
|
outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
|
|
bfd_put_32 (output_bfd, 0, globals->sgot->contents + cur_off);
|
|
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
globals->srelgot->reloc_count++;
|
|
loc += sizeof (Elf32_External_Rel);
|
|
|
|
if (indx == 0)
|
|
bfd_put_32 (output_bfd, value - dtpoff_base (info),
|
|
globals->sgot->contents + cur_off + 4);
|
|
else
|
|
{
|
|
bfd_put_32 (output_bfd, 0,
|
|
globals->sgot->contents + cur_off + 4);
|
|
|
|
outrel.r_info = ELF32_R_INFO (indx,
|
|
R_ARM_TLS_DTPOFF32);
|
|
outrel.r_offset += 4;
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
globals->srelgot->reloc_count++;
|
|
loc += sizeof (Elf32_External_Rel);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* If we are not emitting relocations for a
|
|
general dynamic reference, then we must be in a
|
|
static link or an executable link with the
|
|
symbol binding locally. Mark it as belonging
|
|
to module 1, the executable. */
|
|
bfd_put_32 (output_bfd, 1,
|
|
globals->sgot->contents + cur_off);
|
|
bfd_put_32 (output_bfd, value - dtpoff_base (info),
|
|
globals->sgot->contents + cur_off + 4);
|
|
}
|
|
|
|
cur_off += 8;
|
|
}
|
|
|
|
if (tls_type & GOT_TLS_IE)
|
|
{
|
|
if (need_relocs)
|
|
{
|
|
outrel.r_offset = (globals->sgot->output_section->vma
|
|
+ globals->sgot->output_offset
|
|
+ cur_off);
|
|
outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
|
|
|
|
if (indx == 0)
|
|
bfd_put_32 (output_bfd, value - dtpoff_base (info),
|
|
globals->sgot->contents + cur_off);
|
|
else
|
|
bfd_put_32 (output_bfd, 0,
|
|
globals->sgot->contents + cur_off);
|
|
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
globals->srelgot->reloc_count++;
|
|
loc += sizeof (Elf32_External_Rel);
|
|
}
|
|
else
|
|
bfd_put_32 (output_bfd, tpoff (info, value),
|
|
globals->sgot->contents + cur_off);
|
|
cur_off += 4;
|
|
}
|
|
|
|
if (h != NULL)
|
|
h->got.offset |= 1;
|
|
else
|
|
local_got_offsets[r_symndx] |= 1;
|
|
}
|
|
|
|
if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
|
|
off += 8;
|
|
value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
|
|
- (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
(bfd_vma) 0);
|
|
}
|
|
|
|
case R_ARM_TLS_LE32:
|
|
if (info->shared)
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
|
|
input_bfd, input_section,
|
|
(long) rel->r_offset, howto->name);
|
|
return FALSE;
|
|
}
|
|
else
|
|
value = tpoff (info, value);
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value, (bfd_vma) 0);
|
|
|
|
case R_ARM_V4BX:
|
|
if (globals->fix_v4bx)
|
|
{
|
|
bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
|
|
|
|
/* Ensure that we have a BX instruction. */
|
|
BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
|
|
|
|
/* Preserve Rm (lowest four bits) and the condition code
|
|
(highest four bits). Other bits encode MOV PC,Rm. */
|
|
insn = (insn & 0xf000000f) | 0x01a0f000;
|
|
|
|
bfd_put_32 (input_bfd, insn, hit_data);
|
|
}
|
|
return bfd_reloc_ok;
|
|
|
|
default:
|
|
return bfd_reloc_notsupported;
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
uleb128_size (unsigned int i)
|
|
{
|
|
int size;
|
|
size = 1;
|
|
while (i >= 0x80)
|
|
{
|
|
i >>= 7;
|
|
size++;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
/* Return TRUE if the attribute has the default value (0/""). */
|
|
static bfd_boolean
|
|
is_default_attr (aeabi_attribute *attr)
|
|
{
|
|
if ((attr->type & 1) && attr->i != 0)
|
|
return FALSE;
|
|
if ((attr->type & 2) && attr->s && *attr->s)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Return the size of a single attribute. */
|
|
static bfd_vma
|
|
eabi_attr_size(int tag, aeabi_attribute *attr)
|
|
{
|
|
bfd_vma size;
|
|
|
|
if (is_default_attr (attr))
|
|
return 0;
|
|
|
|
size = uleb128_size (tag);
|
|
if (attr->type & 1)
|
|
size += uleb128_size (attr->i);
|
|
if (attr->type & 2)
|
|
size += strlen ((char *)attr->s) + 1;
|
|
return size;
|
|
}
|
|
|
|
/* Returns the size of the eabi object attributess section. */
|
|
bfd_vma
|
|
elf32_arm_eabi_attr_size (bfd *abfd)
|
|
{
|
|
bfd_vma size;
|
|
aeabi_attribute *attr;
|
|
aeabi_attribute_list *list;
|
|
int i;
|
|
|
|
attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
|
|
size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */
|
|
for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
|
|
size += eabi_attr_size (i, &attr[i]);
|
|
|
|
for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
|
|
list;
|
|
list = list->next)
|
|
size += eabi_attr_size (list->tag, &list->attr);
|
|
|
|
return size;
|
|
}
|
|
|
|
static bfd_byte *
|
|
write_uleb128 (bfd_byte *p, unsigned int val)
|
|
{
|
|
bfd_byte c;
|
|
do
|
|
{
|
|
c = val & 0x7f;
|
|
val >>= 7;
|
|
if (val)
|
|
c |= 0x80;
|
|
*(p++) = c;
|
|
}
|
|
while (val);
|
|
return p;
|
|
}
|
|
|
|
/* Write attribute ATTR to butter P, and return a pointer to the following
|
|
byte. */
|
|
static bfd_byte *
|
|
write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr)
|
|
{
|
|
/* Suppress default entries. */
|
|
if (is_default_attr(attr))
|
|
return p;
|
|
|
|
p = write_uleb128 (p, tag);
|
|
if (attr->type & 1)
|
|
p = write_uleb128 (p, attr->i);
|
|
if (attr->type & 2)
|
|
{
|
|
int len;
|
|
|
|
len = strlen (attr->s) + 1;
|
|
memcpy (p, attr->s, len);
|
|
p += len;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
/* Write the contents of the eabi attributes section to p. */
|
|
void
|
|
elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size)
|
|
{
|
|
bfd_byte *p;
|
|
aeabi_attribute *attr;
|
|
aeabi_attribute_list *list;
|
|
int i;
|
|
|
|
p = contents;
|
|
*(p++) = 'A';
|
|
bfd_put_32 (abfd, size - 1, p);
|
|
p += 4;
|
|
memcpy (p, "aeabi", 6);
|
|
p += 6;
|
|
*(p++) = Tag_File;
|
|
bfd_put_32 (abfd, size - 11, p);
|
|
p += 4;
|
|
|
|
attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
|
|
for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
|
|
p = write_eabi_attribute (p, i, &attr[i]);
|
|
|
|
for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
|
|
list;
|
|
list = list->next)
|
|
p = write_eabi_attribute (p, list->tag, &list->attr);
|
|
}
|
|
|
|
/* Override final_link to handle EABI object attribute sections. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
|
|
{
|
|
asection *o;
|
|
struct bfd_link_order *p;
|
|
asection *attr_section = NULL;
|
|
bfd_byte *contents;
|
|
bfd_vma size = 0;
|
|
|
|
/* elf32_arm_merge_private_bfd_data will already have merged the
|
|
object attributes. Remove the input sections from the link, and set
|
|
the contents of the output secton. */
|
|
for (o = abfd->sections; o != NULL; o = o->next)
|
|
{
|
|
if (strcmp (o->name, ".ARM.attributes") == 0)
|
|
{
|
|
for (p = o->map_head.link_order; p != NULL; p = p->next)
|
|
{
|
|
asection *input_section;
|
|
|
|
if (p->type != bfd_indirect_link_order)
|
|
continue;
|
|
input_section = p->u.indirect.section;
|
|
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
|
elf_link_input_bfd ignores this section. */
|
|
input_section->flags &= ~SEC_HAS_CONTENTS;
|
|
}
|
|
|
|
size = elf32_arm_eabi_attr_size (abfd);
|
|
bfd_set_section_size (abfd, o, size);
|
|
attr_section = o;
|
|
/* Skip this section later on. */
|
|
o->map_head.link_order = NULL;
|
|
}
|
|
}
|
|
/* Invoke the ELF linker to do all the work. */
|
|
if (!bfd_elf_final_link (abfd, info))
|
|
return FALSE;
|
|
|
|
if (attr_section)
|
|
{
|
|
contents = bfd_malloc(size);
|
|
if (contents == NULL)
|
|
return FALSE;
|
|
elf32_arm_set_eabi_attr_contents (abfd, contents, size);
|
|
bfd_set_section_contents (abfd, attr_section, contents, 0, size);
|
|
free (contents);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
|
|
static void
|
|
arm_add_to_rel (bfd * abfd,
|
|
bfd_byte * address,
|
|
reloc_howto_type * howto,
|
|
bfd_signed_vma increment)
|
|
{
|
|
bfd_signed_vma addend;
|
|
|
|
if (howto->type == R_ARM_THM_CALL)
|
|
{
|
|
int upper_insn, lower_insn;
|
|
int upper, lower;
|
|
|
|
upper_insn = bfd_get_16 (abfd, address);
|
|
lower_insn = bfd_get_16 (abfd, address + 2);
|
|
upper = upper_insn & 0x7ff;
|
|
lower = lower_insn & 0x7ff;
|
|
|
|
addend = (upper << 12) | (lower << 1);
|
|
addend += increment;
|
|
addend >>= 1;
|
|
|
|
upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
|
|
lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
|
|
|
|
bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
|
|
bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
|
|
}
|
|
else
|
|
{
|
|
bfd_vma contents;
|
|
|
|
contents = bfd_get_32 (abfd, address);
|
|
|
|
/* Get the (signed) value from the instruction. */
|
|
addend = contents & howto->src_mask;
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
bfd_signed_vma mask;
|
|
|
|
mask = -1;
|
|
mask &= ~ howto->src_mask;
|
|
addend |= mask;
|
|
}
|
|
|
|
/* Add in the increment, (which is a byte value). */
|
|
switch (howto->type)
|
|
{
|
|
default:
|
|
addend += increment;
|
|
break;
|
|
|
|
case R_ARM_PC24:
|
|
case R_ARM_PLT32:
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
addend <<= howto->size;
|
|
addend += increment;
|
|
|
|
/* Should we check for overflow here ? */
|
|
|
|
/* Drop any undesired bits. */
|
|
addend >>= howto->rightshift;
|
|
break;
|
|
}
|
|
|
|
contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
|
|
|
|
bfd_put_32 (abfd, contents, address);
|
|
}
|
|
}
|
|
|
|
#define IS_ARM_TLS_RELOC(R_TYPE) \
|
|
((R_TYPE) == R_ARM_TLS_GD32 \
|
|
|| (R_TYPE) == R_ARM_TLS_LDO32 \
|
|
|| (R_TYPE) == R_ARM_TLS_LDM32 \
|
|
|| (R_TYPE) == R_ARM_TLS_DTPOFF32 \
|
|
|| (R_TYPE) == R_ARM_TLS_DTPMOD32 \
|
|
|| (R_TYPE) == R_ARM_TLS_TPOFF32 \
|
|
|| (R_TYPE) == R_ARM_TLS_LE32 \
|
|
|| (R_TYPE) == R_ARM_TLS_IE32)
|
|
|
|
/* Relocate an ARM ELF section. */
|
|
static bfd_boolean
|
|
elf32_arm_relocate_section (bfd * output_bfd,
|
|
struct bfd_link_info * info,
|
|
bfd * input_bfd,
|
|
asection * input_section,
|
|
bfd_byte * contents,
|
|
Elf_Internal_Rela * relocs,
|
|
Elf_Internal_Sym * local_syms,
|
|
asection ** local_sections)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
Elf_Internal_Rela *rel;
|
|
Elf_Internal_Rela *relend;
|
|
const char *name;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
if (info->relocatable && !globals->use_rel)
|
|
return TRUE;
|
|
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
|
|
rel = relocs;
|
|
relend = relocs + input_section->reloc_count;
|
|
for (; rel < relend; rel++)
|
|
{
|
|
int r_type;
|
|
reloc_howto_type * howto;
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym * sym;
|
|
asection * sec;
|
|
struct elf_link_hash_entry * h;
|
|
bfd_vma relocation;
|
|
bfd_reloc_status_type r;
|
|
arelent bfd_reloc;
|
|
char sym_type;
|
|
bfd_boolean unresolved_reloc = FALSE;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
r_type = arm_real_reloc_type (globals, r_type);
|
|
|
|
if ( r_type == R_ARM_GNU_VTENTRY
|
|
|| r_type == R_ARM_GNU_VTINHERIT)
|
|
continue;
|
|
|
|
bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
|
|
howto = bfd_reloc.howto;
|
|
|
|
if (info->relocatable && globals->use_rel)
|
|
{
|
|
/* This is a relocatable link. We don't have to change
|
|
anything, unless the reloc is against a section symbol,
|
|
in which case we have to adjust according to where the
|
|
section symbol winds up in the output section. */
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
{
|
|
sec = local_sections[r_symndx];
|
|
arm_add_to_rel (input_bfd, contents + rel->r_offset,
|
|
howto,
|
|
(bfd_signed_vma) (sec->output_offset
|
|
+ sym->st_value));
|
|
}
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
/* This is a final link. */
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sym_type = ELF32_ST_TYPE (sym->st_info);
|
|
sec = local_sections[r_symndx];
|
|
if (globals->use_rel)
|
|
{
|
|
relocation = (sec->output_section->vma
|
|
+ sec->output_offset
|
|
+ sym->st_value);
|
|
if ((sec->flags & SEC_MERGE)
|
|
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
{
|
|
asection *msec;
|
|
bfd_vma addend, value;
|
|
|
|
if (howto->rightshift)
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
|
|
input_bfd, input_section,
|
|
(long) rel->r_offset, howto->name);
|
|
return FALSE;
|
|
}
|
|
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
|
|
/* Get the (signed) value from the instruction. */
|
|
addend = value & howto->src_mask;
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
bfd_signed_vma mask;
|
|
|
|
mask = -1;
|
|
mask &= ~ howto->src_mask;
|
|
addend |= mask;
|
|
}
|
|
msec = sec;
|
|
addend =
|
|
_bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
|
|
- relocation;
|
|
addend += msec->output_section->vma + msec->output_offset;
|
|
value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
|
|
bfd_put_32 (input_bfd, value, contents + rel->r_offset);
|
|
}
|
|
}
|
|
else
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean warned;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
|
|
sym_type = h->type;
|
|
}
|
|
|
|
if (h != NULL)
|
|
name = h->root.root.string;
|
|
else
|
|
{
|
|
name = (bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
|
if (name == NULL || *name == '\0')
|
|
name = bfd_section_name (input_bfd, sec);
|
|
}
|
|
|
|
if (r_symndx != 0
|
|
&& r_type != R_ARM_NONE
|
|
&& (h == NULL
|
|
|| h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak)
|
|
&& IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
|
|
{
|
|
(*_bfd_error_handler)
|
|
((sym_type == STT_TLS
|
|
? _("%B(%A+0x%lx): %s used with TLS symbol %s")
|
|
: _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
|
|
input_bfd,
|
|
input_section,
|
|
(long) rel->r_offset,
|
|
howto->name,
|
|
name);
|
|
}
|
|
|
|
r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
|
|
input_section, contents, rel,
|
|
relocation, info, sec, name,
|
|
(h ? ELF_ST_TYPE (h->type) :
|
|
ELF_ST_TYPE (sym->st_info)), h,
|
|
&unresolved_reloc);
|
|
|
|
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
|
because such sections are not SEC_ALLOC and thus ld.so will
|
|
not process them. */
|
|
if (unresolved_reloc
|
|
&& !((input_section->flags & SEC_DEBUGGING) != 0
|
|
&& h->def_dynamic))
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
|
|
input_bfd,
|
|
input_section,
|
|
(long) rel->r_offset,
|
|
howto->name,
|
|
h->root.root.string);
|
|
return FALSE;
|
|
}
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char * msg = (const char *) 0;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
/* If the overflowing reloc was to an undefined symbol,
|
|
we have already printed one error message and there
|
|
is no point complaining again. */
|
|
if ((! h ||
|
|
h->root.type != bfd_link_hash_undefined)
|
|
&& (!((*info->callbacks->reloc_overflow)
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
|
(bfd_vma) 0, input_bfd, input_section,
|
|
rel->r_offset))))
|
|
return FALSE;
|
|
break;
|
|
|
|
case bfd_reloc_undefined:
|
|
if (!((*info->callbacks->undefined_symbol)
|
|
(info, name, input_bfd, input_section,
|
|
rel->r_offset, TRUE)))
|
|
return FALSE;
|
|
break;
|
|
|
|
case bfd_reloc_outofrange:
|
|
msg = _("internal error: out of range error");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_notsupported:
|
|
msg = _("internal error: unsupported relocation error");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_dangerous:
|
|
msg = _("internal error: dangerous error");
|
|
goto common_error;
|
|
|
|
default:
|
|
msg = _("internal error: unknown error");
|
|
/* fall through */
|
|
|
|
common_error:
|
|
if (!((*info->callbacks->warning)
|
|
(info, msg, name, input_bfd, input_section,
|
|
rel->r_offset)))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Allocate/find an object attribute. */
|
|
static aeabi_attribute *
|
|
elf32_arm_new_eabi_attr (bfd *abfd, int tag)
|
|
{
|
|
aeabi_attribute *attr;
|
|
aeabi_attribute_list *list;
|
|
aeabi_attribute_list *p;
|
|
aeabi_attribute_list **lastp;
|
|
|
|
|
|
if (tag < NUM_KNOWN_ATTRIBUTES)
|
|
{
|
|
/* Knwon tags are preallocated. */
|
|
attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag];
|
|
}
|
|
else
|
|
{
|
|
/* Create a new tag. */
|
|
list = (aeabi_attribute_list *)
|
|
bfd_alloc (abfd, sizeof (aeabi_attribute_list));
|
|
memset (list, 0, sizeof (aeabi_attribute_list));
|
|
list->tag = tag;
|
|
/* Keep the tag list in order. */
|
|
lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
|
|
for (p = *lastp; p; p = p->next)
|
|
{
|
|
if (tag < p->tag)
|
|
break;
|
|
lastp = &p->next;
|
|
}
|
|
list->next = *lastp;
|
|
*lastp = list;
|
|
attr = &list->attr;
|
|
}
|
|
|
|
return attr;
|
|
}
|
|
|
|
int
|
|
elf32_arm_get_eabi_attr_int (bfd *abfd, int tag)
|
|
{
|
|
aeabi_attribute_list *p;
|
|
|
|
if (tag < NUM_KNOWN_ATTRIBUTES)
|
|
{
|
|
/* Knwon tags are preallocated. */
|
|
return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i;
|
|
}
|
|
else
|
|
{
|
|
for (p = elf32_arm_tdata (abfd)->other_eabi_attributes;
|
|
p;
|
|
p = p->next)
|
|
{
|
|
if (tag == p->tag)
|
|
return p->attr.i;
|
|
if (tag < p->tag)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i)
|
|
{
|
|
aeabi_attribute *attr;
|
|
|
|
attr = elf32_arm_new_eabi_attr (abfd, tag);
|
|
attr->type = 1;
|
|
attr->i = i;
|
|
}
|
|
|
|
static char *
|
|
attr_strdup (bfd *abfd, const char * s)
|
|
{
|
|
char * p;
|
|
int len;
|
|
|
|
len = strlen (s) + 1;
|
|
p = (char *)bfd_alloc(abfd, len);
|
|
return memcpy (p, s, len);
|
|
}
|
|
|
|
void
|
|
elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s)
|
|
{
|
|
aeabi_attribute *attr;
|
|
|
|
attr = elf32_arm_new_eabi_attr (abfd, tag);
|
|
attr->type = 2;
|
|
attr->s = attr_strdup (abfd, s);
|
|
}
|
|
|
|
void
|
|
elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s)
|
|
{
|
|
aeabi_attribute_list *list;
|
|
aeabi_attribute_list *p;
|
|
aeabi_attribute_list **lastp;
|
|
|
|
list = (aeabi_attribute_list *)
|
|
bfd_alloc (abfd, sizeof (aeabi_attribute_list));
|
|
memset (list, 0, sizeof (aeabi_attribute_list));
|
|
list->tag = Tag_compatibility;
|
|
list->attr.type = 3;
|
|
list->attr.i = i;
|
|
list->attr.s = attr_strdup (abfd, s);
|
|
|
|
lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
|
|
for (p = *lastp; p; p = p->next)
|
|
{
|
|
int cmp;
|
|
if (p->tag != Tag_compatibility)
|
|
break;
|
|
cmp = strcmp(s, p->attr.s);
|
|
if (cmp < 0 || (cmp == 0 && i < p->attr.i))
|
|
break;
|
|
lastp = &p->next;
|
|
}
|
|
list->next = *lastp;
|
|
*lastp = list;
|
|
}
|
|
|
|
/* Set the right machine number. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_object_p (bfd *abfd)
|
|
{
|
|
unsigned int mach;
|
|
|
|
mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
|
|
|
|
if (mach != bfd_mach_arm_unknown)
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
|
|
|
|
else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
|
|
|
|
else
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Function to keep ARM specific flags in the ELF header. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_set_private_flags (bfd *abfd, flagword flags)
|
|
{
|
|
if (elf_flags_init (abfd)
|
|
&& elf_elfheader (abfd)->e_flags != flags)
|
|
{
|
|
if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
|
|
{
|
|
if (flags & EF_ARM_INTERWORK)
|
|
(*_bfd_error_handler)
|
|
(_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
|
|
abfd);
|
|
else
|
|
_bfd_error_handler
|
|
(_("Warning: Clearing the interworking flag of %B due to outside request"),
|
|
abfd);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
elf_elfheader (abfd)->e_flags = flags;
|
|
elf_flags_init (abfd) = TRUE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Copy the eabi object attribute from IBFD to OBFD. */
|
|
static void
|
|
copy_eabi_attributes (bfd *ibfd, bfd *obfd)
|
|
{
|
|
aeabi_attribute *in_attr;
|
|
aeabi_attribute *out_attr;
|
|
aeabi_attribute_list *list;
|
|
int i;
|
|
|
|
in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
|
|
out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
|
|
for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
|
|
{
|
|
out_attr->i = in_attr->i;
|
|
if (in_attr->s && *in_attr->s)
|
|
out_attr->s = attr_strdup (obfd, in_attr->s);
|
|
in_attr++;
|
|
out_attr++;
|
|
}
|
|
|
|
for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
|
|
list;
|
|
list = list->next)
|
|
{
|
|
in_attr = &list->attr;
|
|
switch (in_attr->type)
|
|
{
|
|
case 1:
|
|
elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i);
|
|
break;
|
|
case 2:
|
|
elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s);
|
|
break;
|
|
case 3:
|
|
elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Copy backend specific data from one object module to another. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
flagword in_flags;
|
|
flagword out_flags;
|
|
|
|
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
|
return TRUE;
|
|
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
|
|
|
if (elf_flags_init (obfd)
|
|
&& EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
|
|
&& in_flags != out_flags)
|
|
{
|
|
/* Cannot mix APCS26 and APCS32 code. */
|
|
if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
|
|
return FALSE;
|
|
|
|
/* Cannot mix float APCS and non-float APCS code. */
|
|
if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
|
|
return FALSE;
|
|
|
|
/* If the src and dest have different interworking flags
|
|
then turn off the interworking bit. */
|
|
if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
|
|
{
|
|
if (out_flags & EF_ARM_INTERWORK)
|
|
_bfd_error_handler
|
|
(_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
|
|
obfd, ibfd);
|
|
|
|
in_flags &= ~EF_ARM_INTERWORK;
|
|
}
|
|
|
|
/* Likewise for PIC, though don't warn for this case. */
|
|
if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
|
|
in_flags &= ~EF_ARM_PIC;
|
|
}
|
|
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
|
elf_flags_init (obfd) = TRUE;
|
|
|
|
/* Also copy the EI_OSABI field. */
|
|
elf_elfheader (obfd)->e_ident[EI_OSABI] =
|
|
elf_elfheader (ibfd)->e_ident[EI_OSABI];
|
|
|
|
/* Copy EABI object attributes. */
|
|
copy_eabi_attributes (ibfd, obfd);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Values for Tag_ABI_PCS_R9_use. */
|
|
enum
|
|
{
|
|
AEABI_R9_V6,
|
|
AEABI_R9_SB,
|
|
AEABI_R9_TLS,
|
|
AEABI_R9_unused
|
|
};
|
|
|
|
/* Values for Tag_ABI_PCS_RW_data. */
|
|
enum
|
|
{
|
|
AEABI_PCS_RW_data_absolute,
|
|
AEABI_PCS_RW_data_PCrel,
|
|
AEABI_PCS_RW_data_SBrel,
|
|
AEABI_PCS_RW_data_unused
|
|
};
|
|
|
|
/* Values for Tag_ABI_enum_size. */
|
|
enum
|
|
{
|
|
AEABI_enum_unused,
|
|
AEABI_enum_short,
|
|
AEABI_enum_wide,
|
|
AEABI_enum_forced_wide
|
|
};
|
|
|
|
/* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
|
|
are conflicting attributes. */
|
|
static bfd_boolean
|
|
elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
|
|
{
|
|
aeabi_attribute *in_attr;
|
|
aeabi_attribute *out_attr;
|
|
aeabi_attribute_list *in_list;
|
|
aeabi_attribute_list *out_list;
|
|
/* Some tags have 0 = don't care, 1 = strong requirement,
|
|
2 = weak requirement. */
|
|
static const int order_312[3] = {3, 1, 2};
|
|
int i;
|
|
|
|
if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i)
|
|
{
|
|
/* This is the first object. Copy the attributes. */
|
|
copy_eabi_attributes (ibfd, obfd);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Use the Tag_null value to indicate the attributes have been
|
|
initialized. */
|
|
elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1;
|
|
|
|
in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
|
|
out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
|
|
/* This needs to happen before Tag_ABI_FP_number_model is merged. */
|
|
if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
|
|
{
|
|
/* Ignore mismatches if teh object doesn't use floating point. */
|
|
if (out_attr[Tag_ABI_FP_number_model].i == 0)
|
|
out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
|
|
else if (in_attr[Tag_ABI_FP_number_model].i != 0)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses VFP register arguments, %B does not"),
|
|
ibfd, obfd);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
|
|
{
|
|
/* Merge this attribute with existing attributes. */
|
|
switch (i)
|
|
{
|
|
case Tag_CPU_raw_name:
|
|
case Tag_CPU_name:
|
|
/* Use whichever has the greatest architecture requirements. */
|
|
if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i)
|
|
out_attr[i].s = attr_strdup(obfd, in_attr[i].s);
|
|
break;
|
|
|
|
case Tag_ABI_optimization_goals:
|
|
case Tag_ABI_FP_optimization_goals:
|
|
/* Use the first value seen. */
|
|
break;
|
|
|
|
case Tag_CPU_arch:
|
|
case Tag_ARM_ISA_use:
|
|
case Tag_THUMB_ISA_use:
|
|
case Tag_VFP_arch:
|
|
case Tag_WMMX_arch:
|
|
case Tag_NEON_arch:
|
|
/* ??? Do NEON and WMMX conflict? */
|
|
case Tag_ABI_FP_rounding:
|
|
case Tag_ABI_FP_denormal:
|
|
case Tag_ABI_FP_exceptions:
|
|
case Tag_ABI_FP_user_exceptions:
|
|
case Tag_ABI_FP_number_model:
|
|
case Tag_ABI_align8_preserved:
|
|
case Tag_ABI_HardFP_use:
|
|
/* Use the largest value specified. */
|
|
if (in_attr[i].i > out_attr[i].i)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
|
|
case Tag_CPU_arch_profile:
|
|
/* Warn if conflicting architecture profiles used. */
|
|
if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Conflicting architecture profiles %c/%c"),
|
|
ibfd, in_attr[i].i, out_attr[i].i);
|
|
return FALSE;
|
|
}
|
|
if (in_attr[i].i)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_PCS_config:
|
|
if (out_attr[i].i == 0)
|
|
out_attr[i].i = in_attr[i].i;
|
|
else if (in_attr[i].i != 0 && out_attr[i].i != 0)
|
|
{
|
|
/* It's sometimes ok to mix different configs, so this is only
|
|
a warning. */
|
|
_bfd_error_handler
|
|
(_("Warning: %B: Conflicting platform configuration"), ibfd);
|
|
}
|
|
break;
|
|
case Tag_ABI_PCS_R9_use:
|
|
if (out_attr[i].i != AEABI_R9_unused
|
|
&& in_attr[i].i != AEABI_R9_unused)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Conflicting use of R9"), ibfd);
|
|
return FALSE;
|
|
}
|
|
if (out_attr[i].i == AEABI_R9_unused)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_PCS_RW_data:
|
|
if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
|
|
&& out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
|
|
&& out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: SB relative addressing conflicts with use of R9"),
|
|
ibfd);
|
|
return FALSE;
|
|
}
|
|
/* Use the smallest value specified. */
|
|
if (in_attr[i].i < out_attr[i].i)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_PCS_RO_data:
|
|
/* Use the smallest value specified. */
|
|
if (in_attr[i].i < out_attr[i].i)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_PCS_GOT_use:
|
|
if (in_attr[i].i > 2 || out_attr[i].i > 2
|
|
|| order_312[in_attr[i].i] < order_312[out_attr[i].i])
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_PCS_wchar_t:
|
|
if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
|
|
return FALSE;
|
|
}
|
|
if (in_attr[i].i)
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_align8_needed:
|
|
/* ??? Check against Tag_ABI_align8_preserved. */
|
|
if (in_attr[i].i > 2 || out_attr[i].i > 2
|
|
|| order_312[in_attr[i].i] < order_312[out_attr[i].i])
|
|
out_attr[i].i = in_attr[i].i;
|
|
break;
|
|
case Tag_ABI_enum_size:
|
|
if (in_attr[i].i != AEABI_enum_unused)
|
|
{
|
|
if (out_attr[i].i == AEABI_enum_unused
|
|
|| out_attr[i].i == AEABI_enum_forced_wide)
|
|
{
|
|
/* The existing object is compatible with anything.
|
|
Use whatever requirements the new object has. */
|
|
out_attr[i].i = in_attr[i].i;
|
|
}
|
|
else if (in_attr[i].i != AEABI_enum_forced_wide
|
|
&& out_attr[i].i != in_attr[i].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Conflicting enum sizes"), ibfd);
|
|
}
|
|
}
|
|
break;
|
|
case Tag_ABI_VFP_args:
|
|
/* Aready done. */
|
|
break;
|
|
case Tag_ABI_WMMX_args:
|
|
if (in_attr[i].i != out_attr[i].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses iWMMXt register arguments, %B does not"),
|
|
ibfd, obfd);
|
|
return FALSE;
|
|
}
|
|
break;
|
|
default: /* All known attributes should be explicitly covered. */
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
|
|
out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
|
|
while (in_list && in_list->tag == Tag_compatibility)
|
|
{
|
|
in_attr = &in_list->attr;
|
|
if (in_attr->i == 0)
|
|
continue;
|
|
if (in_attr->i == 1)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Must be processed by '%s' toolchain"),
|
|
ibfd, in_attr->s);
|
|
return FALSE;
|
|
}
|
|
if (!out_list || out_list->tag != Tag_compatibility
|
|
|| strcmp (in_attr->s, out_list->attr.s) != 0)
|
|
{
|
|
/* Add this compatibility tag to the output. */
|
|
elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
|
|
continue;
|
|
}
|
|
out_attr = &out_list->attr;
|
|
/* Check all the input tags with the same identifier. */
|
|
for (;;)
|
|
{
|
|
if (out_list->tag != Tag_compatibility
|
|
|| in_attr->i != out_attr->i
|
|
|| strcmp (in_attr->s, out_attr->s) != 0)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Incompatible object tag '%s':%d"),
|
|
ibfd, in_attr->s, in_attr->i);
|
|
return FALSE;
|
|
}
|
|
in_list = in_list->next;
|
|
if (in_list->tag != Tag_compatibility
|
|
|| strcmp (in_attr->s, in_list->attr.s) != 0)
|
|
break;
|
|
in_attr = &in_list->attr;
|
|
out_list = out_list->next;
|
|
if (out_list)
|
|
out_attr = &out_list->attr;
|
|
}
|
|
|
|
/* Check the output doesn't have extra tags with this identifier. */
|
|
if (out_list && out_list->tag == Tag_compatibility
|
|
&& strcmp (in_attr->s, out_list->attr.s) == 0)
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B: Incompatible object tag '%s':%d"),
|
|
ibfd, in_attr->s, out_list->attr.i);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
for (; in_list; in_list = in_list->next)
|
|
{
|
|
if ((in_list->tag & 128) < 64)
|
|
_bfd_error_handler
|
|
(_("Warning: %B: Unknown EABI object attribute %d"),
|
|
ibfd, in_list->tag);
|
|
break;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Merge backend specific data from an object file to the output
|
|
object file when linking. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
|
|
{
|
|
flagword out_flags;
|
|
flagword in_flags;
|
|
bfd_boolean flags_compatible = TRUE;
|
|
asection *sec;
|
|
|
|
/* Check if we have the same endianess. */
|
|
if (! _bfd_generic_verify_endian_match (ibfd, obfd))
|
|
return FALSE;
|
|
|
|
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
|
return TRUE;
|
|
|
|
if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
|
|
return FALSE;
|
|
|
|
/* The input BFD must have had its flags initialised. */
|
|
/* The following seems bogus to me -- The flags are initialized in
|
|
the assembler but I don't think an elf_flags_init field is
|
|
written into the object. */
|
|
/* BFD_ASSERT (elf_flags_init (ibfd)); */
|
|
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
|
|
|
if (!elf_flags_init (obfd))
|
|
{
|
|
/* If the input is the default architecture and had the default
|
|
flags then do not bother setting the flags for the output
|
|
architecture, instead allow future merges to do this. If no
|
|
future merges ever set these flags then they will retain their
|
|
uninitialised values, which surprise surprise, correspond
|
|
to the default values. */
|
|
if (bfd_get_arch_info (ibfd)->the_default
|
|
&& elf_elfheader (ibfd)->e_flags == 0)
|
|
return TRUE;
|
|
|
|
elf_flags_init (obfd) = TRUE;
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
|
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
|
&& bfd_get_arch_info (obfd)->the_default)
|
|
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Determine what should happen if the input ARM architecture
|
|
does not match the output ARM architecture. */
|
|
if (! bfd_arm_merge_machines (ibfd, obfd))
|
|
return FALSE;
|
|
|
|
/* Identical flags must be compatible. */
|
|
if (in_flags == out_flags)
|
|
return TRUE;
|
|
|
|
/* Check to see if the input BFD actually contains any sections. If
|
|
not, its flags may not have been initialised either, but it
|
|
cannot actually cause any incompatiblity. Do not short-circuit
|
|
dynamic objects; their section list may be emptied by
|
|
elf_link_add_object_symbols.
|
|
|
|
Also check to see if there are no code sections in the input.
|
|
In this case there is no need to check for code specific flags.
|
|
XXX - do we need to worry about floating-point format compatability
|
|
in data sections ? */
|
|
if (!(ibfd->flags & DYNAMIC))
|
|
{
|
|
bfd_boolean null_input_bfd = TRUE;
|
|
bfd_boolean only_data_sections = TRUE;
|
|
|
|
for (sec = ibfd->sections; sec != NULL; sec = sec->next)
|
|
{
|
|
/* Ignore synthetic glue sections. */
|
|
if (strcmp (sec->name, ".glue_7")
|
|
&& strcmp (sec->name, ".glue_7t"))
|
|
{
|
|
if ((bfd_get_section_flags (ibfd, sec)
|
|
& (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
|
|
== (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
|
|
only_data_sections = FALSE;
|
|
|
|
null_input_bfd = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (null_input_bfd || only_data_sections)
|
|
return TRUE;
|
|
}
|
|
|
|
/* Complain about various flag mismatches. */
|
|
if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
|
|
ibfd, obfd,
|
|
(in_flags & EF_ARM_EABIMASK) >> 24,
|
|
(out_flags & EF_ARM_EABIMASK) >> 24);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Not sure what needs to be checked for EABI versions >= 1. */
|
|
if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
|
|
{
|
|
if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
|
|
{
|
|
_bfd_error_handler
|
|
(_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
|
|
ibfd, obfd,
|
|
in_flags & EF_ARM_APCS_26 ? 26 : 32,
|
|
out_flags & EF_ARM_APCS_26 ? 26 : 32);
|
|
flags_compatible = FALSE;
|
|
}
|
|
|
|
if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
|
|
{
|
|
if (in_flags & EF_ARM_APCS_FLOAT)
|
|
_bfd_error_handler
|
|
(_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
|
|
ibfd, obfd);
|
|
else
|
|
_bfd_error_handler
|
|
(_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
|
|
ibfd, obfd);
|
|
|
|
flags_compatible = FALSE;
|
|
}
|
|
|
|
if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
|
|
{
|
|
if (in_flags & EF_ARM_VFP_FLOAT)
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses VFP instructions, whereas %B does not"),
|
|
ibfd, obfd);
|
|
else
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses FPA instructions, whereas %B does not"),
|
|
ibfd, obfd);
|
|
|
|
flags_compatible = FALSE;
|
|
}
|
|
|
|
if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
|
|
{
|
|
if (in_flags & EF_ARM_MAVERICK_FLOAT)
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses Maverick instructions, whereas %B does not"),
|
|
ibfd, obfd);
|
|
else
|
|
_bfd_error_handler
|
|
(_("ERROR: %B does not use Maverick instructions, whereas %B does"),
|
|
ibfd, obfd);
|
|
|
|
flags_compatible = FALSE;
|
|
}
|
|
|
|
#ifdef EF_ARM_SOFT_FLOAT
|
|
if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
|
|
{
|
|
/* We can allow interworking between code that is VFP format
|
|
layout, and uses either soft float or integer regs for
|
|
passing floating point arguments and results. We already
|
|
know that the APCS_FLOAT flags match; similarly for VFP
|
|
flags. */
|
|
if ((in_flags & EF_ARM_APCS_FLOAT) != 0
|
|
|| (in_flags & EF_ARM_VFP_FLOAT) == 0)
|
|
{
|
|
if (in_flags & EF_ARM_SOFT_FLOAT)
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
|
|
ibfd, obfd);
|
|
else
|
|
_bfd_error_handler
|
|
(_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
|
|
ibfd, obfd);
|
|
|
|
flags_compatible = FALSE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Interworking mismatch is only a warning. */
|
|
if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
|
|
{
|
|
if (in_flags & EF_ARM_INTERWORK)
|
|
{
|
|
_bfd_error_handler
|
|
(_("Warning: %B supports interworking, whereas %B does not"),
|
|
ibfd, obfd);
|
|
}
|
|
else
|
|
{
|
|
_bfd_error_handler
|
|
(_("Warning: %B does not support interworking, whereas %B does"),
|
|
ibfd, obfd);
|
|
}
|
|
}
|
|
}
|
|
|
|
return flags_compatible;
|
|
}
|
|
|
|
/* Display the flags field. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
|
|
{
|
|
FILE * file = (FILE *) ptr;
|
|
unsigned long flags;
|
|
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
|
|
|
/* Print normal ELF private data. */
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
|
|
|
flags = elf_elfheader (abfd)->e_flags;
|
|
/* Ignore init flag - it may not be set, despite the flags field
|
|
containing valid data. */
|
|
|
|
/* xgettext:c-format */
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
|
|
|
switch (EF_ARM_EABI_VERSION (flags))
|
|
{
|
|
case EF_ARM_EABI_UNKNOWN:
|
|
/* The following flag bits are GNU extensions and not part of the
|
|
official ARM ELF extended ABI. Hence they are only decoded if
|
|
the EABI version is not set. */
|
|
if (flags & EF_ARM_INTERWORK)
|
|
fprintf (file, _(" [interworking enabled]"));
|
|
|
|
if (flags & EF_ARM_APCS_26)
|
|
fprintf (file, " [APCS-26]");
|
|
else
|
|
fprintf (file, " [APCS-32]");
|
|
|
|
if (flags & EF_ARM_VFP_FLOAT)
|
|
fprintf (file, _(" [VFP float format]"));
|
|
else if (flags & EF_ARM_MAVERICK_FLOAT)
|
|
fprintf (file, _(" [Maverick float format]"));
|
|
else
|
|
fprintf (file, _(" [FPA float format]"));
|
|
|
|
if (flags & EF_ARM_APCS_FLOAT)
|
|
fprintf (file, _(" [floats passed in float registers]"));
|
|
|
|
if (flags & EF_ARM_PIC)
|
|
fprintf (file, _(" [position independent]"));
|
|
|
|
if (flags & EF_ARM_NEW_ABI)
|
|
fprintf (file, _(" [new ABI]"));
|
|
|
|
if (flags & EF_ARM_OLD_ABI)
|
|
fprintf (file, _(" [old ABI]"));
|
|
|
|
if (flags & EF_ARM_SOFT_FLOAT)
|
|
fprintf (file, _(" [software FP]"));
|
|
|
|
flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
|
|
| EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
|
|
| EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
|
|
| EF_ARM_MAVERICK_FLOAT);
|
|
break;
|
|
|
|
case EF_ARM_EABI_VER1:
|
|
fprintf (file, _(" [Version1 EABI]"));
|
|
|
|
if (flags & EF_ARM_SYMSARESORTED)
|
|
fprintf (file, _(" [sorted symbol table]"));
|
|
else
|
|
fprintf (file, _(" [unsorted symbol table]"));
|
|
|
|
flags &= ~ EF_ARM_SYMSARESORTED;
|
|
break;
|
|
|
|
case EF_ARM_EABI_VER2:
|
|
fprintf (file, _(" [Version2 EABI]"));
|
|
|
|
if (flags & EF_ARM_SYMSARESORTED)
|
|
fprintf (file, _(" [sorted symbol table]"));
|
|
else
|
|
fprintf (file, _(" [unsorted symbol table]"));
|
|
|
|
if (flags & EF_ARM_DYNSYMSUSESEGIDX)
|
|
fprintf (file, _(" [dynamic symbols use segment index]"));
|
|
|
|
if (flags & EF_ARM_MAPSYMSFIRST)
|
|
fprintf (file, _(" [mapping symbols precede others]"));
|
|
|
|
flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
|
|
| EF_ARM_MAPSYMSFIRST);
|
|
break;
|
|
|
|
case EF_ARM_EABI_VER3:
|
|
fprintf (file, _(" [Version3 EABI]"));
|
|
break;
|
|
|
|
case EF_ARM_EABI_VER4:
|
|
fprintf (file, _(" [Version4 EABI]"));
|
|
|
|
if (flags & EF_ARM_BE8)
|
|
fprintf (file, _(" [BE8]"));
|
|
|
|
if (flags & EF_ARM_LE8)
|
|
fprintf (file, _(" [LE8]"));
|
|
|
|
flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
|
|
break;
|
|
|
|
default:
|
|
fprintf (file, _(" <EABI version unrecognised>"));
|
|
break;
|
|
}
|
|
|
|
flags &= ~ EF_ARM_EABIMASK;
|
|
|
|
if (flags & EF_ARM_RELEXEC)
|
|
fprintf (file, _(" [relocatable executable]"));
|
|
|
|
if (flags & EF_ARM_HASENTRY)
|
|
fprintf (file, _(" [has entry point]"));
|
|
|
|
flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
|
|
|
|
if (flags)
|
|
fprintf (file, _("<Unrecognised flag bits set>"));
|
|
|
|
fputc ('\n', file);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
|
|
{
|
|
switch (ELF_ST_TYPE (elf_sym->st_info))
|
|
{
|
|
case STT_ARM_TFUNC:
|
|
return ELF_ST_TYPE (elf_sym->st_info);
|
|
|
|
case STT_ARM_16BIT:
|
|
/* If the symbol is not an object, return the STT_ARM_16BIT flag.
|
|
This allows us to distinguish between data used by Thumb instructions
|
|
and non-data (which is probably code) inside Thumb regions of an
|
|
executable. */
|
|
if (type != STT_OBJECT && type != STT_TLS)
|
|
return ELF_ST_TYPE (elf_sym->st_info);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
static asection *
|
|
elf32_arm_gc_mark_hook (asection * sec,
|
|
struct bfd_link_info * info ATTRIBUTE_UNUSED,
|
|
Elf_Internal_Rela * rel,
|
|
struct elf_link_hash_entry * h,
|
|
Elf_Internal_Sym * sym)
|
|
{
|
|
if (h != NULL)
|
|
{
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
|
{
|
|
case R_ARM_GNU_VTINHERIT:
|
|
case R_ARM_GNU_VTENTRY:
|
|
break;
|
|
|
|
default:
|
|
switch (h->root.type)
|
|
{
|
|
case bfd_link_hash_defined:
|
|
case bfd_link_hash_defweak:
|
|
return h->root.u.def.section;
|
|
|
|
case bfd_link_hash_common:
|
|
return h->root.u.c.p->section;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_gc_sweep_hook (bfd * abfd,
|
|
struct bfd_link_info * info,
|
|
asection * sec,
|
|
const Elf_Internal_Rela * relocs)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
bfd_signed_vma *local_got_refcounts;
|
|
const Elf_Internal_Rela *rel, *relend;
|
|
struct elf32_arm_link_hash_table * globals;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
|
|
relend = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < relend; rel++)
|
|
{
|
|
unsigned long r_symndx;
|
|
struct elf_link_hash_entry *h = NULL;
|
|
int r_type;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
r_type = arm_real_reloc_type (globals, r_type);
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_GOT32:
|
|
case R_ARM_GOT_PREL:
|
|
case R_ARM_TLS_GD32:
|
|
case R_ARM_TLS_IE32:
|
|
if (h != NULL)
|
|
{
|
|
if (h->got.refcount > 0)
|
|
h->got.refcount -= 1;
|
|
}
|
|
else if (local_got_refcounts != NULL)
|
|
{
|
|
if (local_got_refcounts[r_symndx] > 0)
|
|
local_got_refcounts[r_symndx] -= 1;
|
|
}
|
|
break;
|
|
|
|
case R_ARM_TLS_LDM32:
|
|
elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
|
|
break;
|
|
|
|
case R_ARM_ABS32:
|
|
case R_ARM_REL32:
|
|
case R_ARM_PC24:
|
|
case R_ARM_PLT32:
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
case R_ARM_PREL31:
|
|
case R_ARM_THM_CALL:
|
|
/* Should the interworking branches be here also? */
|
|
|
|
if (h != NULL)
|
|
{
|
|
struct elf32_arm_link_hash_entry *eh;
|
|
struct elf32_arm_relocs_copied **pp;
|
|
struct elf32_arm_relocs_copied *p;
|
|
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
|
|
if (h->plt.refcount > 0)
|
|
{
|
|
h->plt.refcount -= 1;
|
|
if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
|
|
eh->plt_thumb_refcount--;
|
|
}
|
|
|
|
if (r_type == R_ARM_ABS32
|
|
|| r_type == R_ARM_REL32)
|
|
{
|
|
for (pp = &eh->relocs_copied; (p = *pp) != NULL;
|
|
pp = &p->next)
|
|
if (p->section == sec)
|
|
{
|
|
p->count -= 1;
|
|
if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
|
|
p->pc_count -= 1;
|
|
if (p->count == 0)
|
|
*pp = p->next;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
|
|
asection *sec, const Elf_Internal_Rela *relocs)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_link_hash_entry **sym_hashes_end;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
bfd *dynobj;
|
|
asection *sreloc;
|
|
bfd_vma *local_got_offsets;
|
|
struct elf32_arm_link_hash_table *htab;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
htab = elf32_arm_hash_table (info);
|
|
sreloc = NULL;
|
|
|
|
/* Create dynamic sections for relocatable executables so that we can
|
|
copy relocations. */
|
|
if (htab->root.is_relocatable_executable
|
|
&& ! htab->root.dynamic_sections_created)
|
|
{
|
|
if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
|
|
return FALSE;
|
|
}
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
local_got_offsets = elf_local_got_offsets (abfd);
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
sym_hashes_end = sym_hashes
|
|
+ symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
|
|
|
if (!elf_bad_symtab (abfd))
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
struct elf32_arm_link_hash_entry *eh;
|
|
unsigned long r_symndx;
|
|
int r_type;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
r_type = arm_real_reloc_type (htab, r_type);
|
|
|
|
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
|
{
|
|
(*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
|
|
r_symndx);
|
|
return FALSE;
|
|
}
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
h = NULL;
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_GOT32:
|
|
case R_ARM_GOT_PREL:
|
|
case R_ARM_TLS_GD32:
|
|
case R_ARM_TLS_IE32:
|
|
/* This symbol requires a global offset table entry. */
|
|
{
|
|
int tls_type, old_tls_type;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
|
|
case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
|
|
default: tls_type = GOT_NORMAL; break;
|
|
}
|
|
|
|
if (h != NULL)
|
|
{
|
|
h->got.refcount++;
|
|
old_tls_type = elf32_arm_hash_entry (h)->tls_type;
|
|
}
|
|
else
|
|
{
|
|
bfd_signed_vma *local_got_refcounts;
|
|
|
|
/* This is a global offset table entry for a local symbol. */
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
if (local_got_refcounts == NULL)
|
|
{
|
|
bfd_size_type size;
|
|
|
|
size = symtab_hdr->sh_info;
|
|
size *= (sizeof (bfd_signed_vma) + sizeof(char));
|
|
local_got_refcounts = bfd_zalloc (abfd, size);
|
|
if (local_got_refcounts == NULL)
|
|
return FALSE;
|
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
|
elf32_arm_local_got_tls_type (abfd)
|
|
= (char *) (local_got_refcounts + symtab_hdr->sh_info);
|
|
}
|
|
local_got_refcounts[r_symndx] += 1;
|
|
old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
|
|
}
|
|
|
|
/* We will already have issued an error message if there is a
|
|
TLS / non-TLS mismatch, based on the symbol type. We don't
|
|
support any linker relaxations. So just combine any TLS
|
|
types needed. */
|
|
if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
|
|
&& tls_type != GOT_NORMAL)
|
|
tls_type |= old_tls_type;
|
|
|
|
if (old_tls_type != tls_type)
|
|
{
|
|
if (h != NULL)
|
|
elf32_arm_hash_entry (h)->tls_type = tls_type;
|
|
else
|
|
elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
|
}
|
|
}
|
|
/* Fall through */
|
|
|
|
case R_ARM_TLS_LDM32:
|
|
if (r_type == R_ARM_TLS_LDM32)
|
|
htab->tls_ldm_got.refcount++;
|
|
/* Fall through */
|
|
|
|
case R_ARM_GOTOFF32:
|
|
case R_ARM_GOTPC:
|
|
if (htab->sgot == NULL)
|
|
{
|
|
if (htab->root.dynobj == NULL)
|
|
htab->root.dynobj = abfd;
|
|
if (!create_got_section (htab->root.dynobj, info))
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case R_ARM_ABS32:
|
|
case R_ARM_REL32:
|
|
case R_ARM_PC24:
|
|
case R_ARM_PLT32:
|
|
case R_ARM_CALL:
|
|
case R_ARM_JUMP24:
|
|
case R_ARM_PREL31:
|
|
case R_ARM_THM_CALL:
|
|
/* Should the interworking branches be listed here? */
|
|
if (h != NULL)
|
|
{
|
|
/* If this reloc is in a read-only section, we might
|
|
need a copy reloc. We can't check reliably at this
|
|
stage whether the section is read-only, as input
|
|
sections have not yet been mapped to output sections.
|
|
Tentatively set the flag for now, and correct in
|
|
adjust_dynamic_symbol. */
|
|
if (!info->shared)
|
|
h->non_got_ref = 1;
|
|
|
|
/* We may need a .plt entry if the function this reloc
|
|
refers to is in a different object. We can't tell for
|
|
sure yet, because something later might force the
|
|
symbol local. */
|
|
if (r_type == R_ARM_PC24
|
|
|| r_type == R_ARM_CALL
|
|
|| r_type == R_ARM_JUMP24
|
|
|| r_type == R_ARM_PREL31
|
|
|| r_type == R_ARM_PLT32
|
|
|| r_type == R_ARM_THM_CALL)
|
|
h->needs_plt = 1;
|
|
|
|
/* If we create a PLT entry, this relocation will reference
|
|
it, even if it's an ABS32 relocation. */
|
|
h->plt.refcount += 1;
|
|
|
|
if (r_type == R_ARM_THM_CALL)
|
|
eh->plt_thumb_refcount += 1;
|
|
}
|
|
|
|
/* If we are creating a shared library or relocatable executable,
|
|
and this is a reloc against a global symbol, or a non PC
|
|
relative reloc against a local symbol, then we need to copy
|
|
the reloc into the shared library. However, if we are linking
|
|
with -Bsymbolic, we do not need to copy a reloc against a
|
|
global symbol which is defined in an object we are
|
|
including in the link (i.e., DEF_REGULAR is set). At
|
|
this point we have not seen all the input files, so it is
|
|
possible that DEF_REGULAR is not set now but will be set
|
|
later (it is never cleared). We account for that
|
|
possibility below by storing information in the
|
|
relocs_copied field of the hash table entry. */
|
|
if ((info->shared || htab->root.is_relocatable_executable)
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
|
&& (r_type == R_ARM_ABS32
|
|
|| (h != NULL && ! h->needs_plt
|
|
&& (! info->symbolic || ! h->def_regular))))
|
|
{
|
|
struct elf32_arm_relocs_copied *p, **head;
|
|
|
|
/* When creating a shared object, we must copy these
|
|
reloc types into the output file. We create a reloc
|
|
section in dynobj and make room for this reloc. */
|
|
if (sreloc == NULL)
|
|
{
|
|
const char * name;
|
|
|
|
name = (bfd_elf_string_from_elf_section
|
|
(abfd,
|
|
elf_elfheader (abfd)->e_shstrndx,
|
|
elf_section_data (sec)->rel_hdr.sh_name));
|
|
if (name == NULL)
|
|
return FALSE;
|
|
|
|
BFD_ASSERT (strncmp (name, ".rel", 4) == 0
|
|
&& strcmp (bfd_get_section_name (abfd, sec),
|
|
name + 4) == 0);
|
|
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
|
if (sreloc == NULL)
|
|
{
|
|
flagword flags;
|
|
|
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
|
if ((sec->flags & SEC_ALLOC) != 0
|
|
/* BPABI objects never have dynamic
|
|
relocations mapped. */
|
|
&& !htab->symbian_p)
|
|
flags |= SEC_ALLOC | SEC_LOAD;
|
|
sreloc = bfd_make_section_with_flags (dynobj,
|
|
name,
|
|
flags);
|
|
if (sreloc == NULL
|
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
|
return FALSE;
|
|
}
|
|
|
|
elf_section_data (sec)->sreloc = sreloc;
|
|
}
|
|
|
|
/* If this is a global symbol, we count the number of
|
|
relocations we need for this symbol. */
|
|
if (h != NULL)
|
|
{
|
|
head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
|
|
}
|
|
else
|
|
{
|
|
/* Track dynamic relocs needed for local syms too.
|
|
We really need local syms available to do this
|
|
easily. Oh well. */
|
|
|
|
asection *s;
|
|
void *vpp;
|
|
|
|
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
|
|
sec, r_symndx);
|
|
if (s == NULL)
|
|
return FALSE;
|
|
|
|
vpp = &elf_section_data (s)->local_dynrel;
|
|
head = (struct elf32_arm_relocs_copied **) vpp;
|
|
}
|
|
|
|
p = *head;
|
|
if (p == NULL || p->section != sec)
|
|
{
|
|
bfd_size_type amt = sizeof *p;
|
|
|
|
p = bfd_alloc (htab->root.dynobj, amt);
|
|
if (p == NULL)
|
|
return FALSE;
|
|
p->next = *head;
|
|
*head = p;
|
|
p->section = sec;
|
|
p->count = 0;
|
|
p->pc_count = 0;
|
|
}
|
|
|
|
if (r_type == R_ARM_REL32)
|
|
p->pc_count += 1;
|
|
p->count += 1;
|
|
}
|
|
break;
|
|
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
|
Reconstruct it for later use during GC. */
|
|
case R_ARM_GNU_VTINHERIT:
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
|
return FALSE;
|
|
break;
|
|
|
|
/* This relocation describes which C++ vtable entries are actually
|
|
used. Record for later use during GC. */
|
|
case R_ARM_GNU_VTENTRY:
|
|
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Treat mapping symbols as special target symbols. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
|
|
{
|
|
return bfd_is_arm_mapping_symbol_name (sym->name);
|
|
}
|
|
|
|
/* This is a copy of elf_find_function() from elf.c except that
|
|
ARM mapping symbols are ignored when looking for function names
|
|
and STT_ARM_TFUNC is considered to a function type. */
|
|
|
|
static bfd_boolean
|
|
arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
|
|
asection * section,
|
|
asymbol ** symbols,
|
|
bfd_vma offset,
|
|
const char ** filename_ptr,
|
|
const char ** functionname_ptr)
|
|
{
|
|
const char * filename = NULL;
|
|
asymbol * func = NULL;
|
|
bfd_vma low_func = 0;
|
|
asymbol ** p;
|
|
|
|
for (p = symbols; *p != NULL; p++)
|
|
{
|
|
elf_symbol_type *q;
|
|
|
|
q = (elf_symbol_type *) *p;
|
|
|
|
switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
|
|
{
|
|
default:
|
|
break;
|
|
case STT_FILE:
|
|
filename = bfd_asymbol_name (&q->symbol);
|
|
break;
|
|
case STT_FUNC:
|
|
case STT_ARM_TFUNC:
|
|
case STT_NOTYPE:
|
|
/* Skip $a and $t symbols. */
|
|
if ((q->symbol.flags & BSF_LOCAL)
|
|
&& bfd_is_arm_mapping_symbol_name (q->symbol.name))
|
|
continue;
|
|
/* Fall through. */
|
|
if (bfd_get_section (&q->symbol) == section
|
|
&& q->symbol.value >= low_func
|
|
&& q->symbol.value <= offset)
|
|
{
|
|
func = (asymbol *) q;
|
|
low_func = q->symbol.value;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (func == NULL)
|
|
return FALSE;
|
|
|
|
if (filename_ptr)
|
|
*filename_ptr = filename;
|
|
if (functionname_ptr)
|
|
*functionname_ptr = bfd_asymbol_name (func);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Find the nearest line to a particular section and offset, for error
|
|
reporting. This code is a duplicate of the code in elf.c, except
|
|
that it uses arm_elf_find_function. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_find_nearest_line (bfd * abfd,
|
|
asection * section,
|
|
asymbol ** symbols,
|
|
bfd_vma offset,
|
|
const char ** filename_ptr,
|
|
const char ** functionname_ptr,
|
|
unsigned int * line_ptr)
|
|
{
|
|
bfd_boolean found = FALSE;
|
|
|
|
/* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
|
|
|
|
if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
|
|
filename_ptr, functionname_ptr,
|
|
line_ptr, 0,
|
|
& elf_tdata (abfd)->dwarf2_find_line_info))
|
|
{
|
|
if (!*functionname_ptr)
|
|
arm_elf_find_function (abfd, section, symbols, offset,
|
|
*filename_ptr ? NULL : filename_ptr,
|
|
functionname_ptr);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
|
|
& found, filename_ptr,
|
|
functionname_ptr, line_ptr,
|
|
& elf_tdata (abfd)->line_info))
|
|
return FALSE;
|
|
|
|
if (found && (*functionname_ptr || *line_ptr))
|
|
return TRUE;
|
|
|
|
if (symbols == NULL)
|
|
return FALSE;
|
|
|
|
if (! arm_elf_find_function (abfd, section, symbols, offset,
|
|
filename_ptr, functionname_ptr))
|
|
return FALSE;
|
|
|
|
*line_ptr = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_arm_find_inliner_info (bfd * abfd,
|
|
const char ** filename_ptr,
|
|
const char ** functionname_ptr,
|
|
unsigned int * line_ptr)
|
|
{
|
|
bfd_boolean found;
|
|
found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
|
|
functionname_ptr, line_ptr,
|
|
& elf_tdata (abfd)->dwarf2_find_line_info);
|
|
return found;
|
|
}
|
|
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
|
regular object. The current definition is in some section of the
|
|
dynamic object, but we're not including those sections. We have to
|
|
change the definition to something the rest of the link can
|
|
understand. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
|
|
struct elf_link_hash_entry * h)
|
|
{
|
|
bfd * dynobj;
|
|
asection * s;
|
|
unsigned int power_of_two;
|
|
struct elf32_arm_link_hash_entry * eh;
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
globals = elf32_arm_hash_table (info);
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
/* Make sure we know what is going on here. */
|
|
BFD_ASSERT (dynobj != NULL
|
|
&& (h->needs_plt
|
|
|| h->u.weakdef != NULL
|
|
|| (h->def_dynamic
|
|
&& h->ref_regular
|
|
&& !h->def_regular)));
|
|
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
|
|
/* If this is a function, put it in the procedure linkage table. We
|
|
will fill in the contents of the procedure linkage table later,
|
|
when we know the address of the .got section. */
|
|
if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
|
|
|| h->needs_plt)
|
|
{
|
|
if (h->plt.refcount <= 0
|
|
|| SYMBOL_CALLS_LOCAL (info, h)
|
|
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
|
&& h->root.type == bfd_link_hash_undefweak))
|
|
{
|
|
/* This case can occur if we saw a PLT32 reloc in an input
|
|
file, but the symbol was never referred to by a dynamic
|
|
object, or if all references were garbage collected. In
|
|
such a case, we don't actually need to build a procedure
|
|
linkage table, and we can just do a PC24 reloc instead. */
|
|
h->plt.offset = (bfd_vma) -1;
|
|
eh->plt_thumb_refcount = 0;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
{
|
|
/* It's possible that we incorrectly decided a .plt reloc was
|
|
needed for an R_ARM_PC24 or similar reloc to a non-function sym
|
|
in check_relocs. We can't decide accurately between function
|
|
and non-function syms in check-relocs; Objects loaded later in
|
|
the link may change h->type. So fix it now. */
|
|
h->plt.offset = (bfd_vma) -1;
|
|
eh->plt_thumb_refcount = 0;
|
|
}
|
|
|
|
/* If this is a weak symbol, and there is a real definition, the
|
|
processor independent code will have arranged for us to see the
|
|
real definition first, and we can just use the same value. */
|
|
if (h->u.weakdef != NULL)
|
|
{
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
|
return TRUE;
|
|
}
|
|
|
|
/* If there are no non-GOT references, we do not need a copy
|
|
relocation. */
|
|
if (!h->non_got_ref)
|
|
return TRUE;
|
|
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
|
is not a function. */
|
|
|
|
/* If we are creating a shared library, we must presume that the
|
|
only references to the symbol are via the global offset table.
|
|
For such cases we need not do anything here; the relocations will
|
|
be handled correctly by relocate_section. Relocatable executables
|
|
can reference data in shared objects directly, so we don't need to
|
|
do anything here. */
|
|
if (info->shared || globals->root.is_relocatable_executable)
|
|
return TRUE;
|
|
|
|
if (h->size == 0)
|
|
{
|
|
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
|
|
h->root.root.string);
|
|
return TRUE;
|
|
}
|
|
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
|
become part of the .bss section of the executable. There will be
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
|
object will contain position independent code, so all references
|
|
from the dynamic object to this symbol will go through the global
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
|
determine the address it must put in the global offset table, so
|
|
both the dynamic object and the regular object will refer to the
|
|
same memory location for the variable. */
|
|
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
/* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
|
|
copy the initial value out of the dynamic object and into the
|
|
runtime process image. We need to remember the offset into the
|
|
.rel.bss section we are going to use. */
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
|
{
|
|
asection *srel;
|
|
|
|
srel = bfd_get_section_by_name (dynobj, ".rel.bss");
|
|
BFD_ASSERT (srel != NULL);
|
|
srel->size += sizeof (Elf32_External_Rel);
|
|
h->needs_copy = 1;
|
|
}
|
|
|
|
/* We need to figure out the alignment required for this symbol. I
|
|
have no idea how ELF linkers handle this. */
|
|
power_of_two = bfd_log2 (h->size);
|
|
if (power_of_two > 3)
|
|
power_of_two = 3;
|
|
|
|
/* Apply the required alignment. */
|
|
s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
|
|
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
|
{
|
|
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
|
|
return FALSE;
|
|
}
|
|
|
|
/* Define the symbol as being at this point in the section. */
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = s->size;
|
|
|
|
/* Increment the section size to make room for the symbol. */
|
|
s->size += h->size;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
|
|
{
|
|
struct bfd_link_info *info;
|
|
struct elf32_arm_link_hash_table *htab;
|
|
struct elf32_arm_link_hash_entry *eh;
|
|
struct elf32_arm_relocs_copied *p;
|
|
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
/* When warning symbols are created, they **replace** the "real"
|
|
entry in the hash table, thus we never get to see the real
|
|
symbol in a hash traversal. So look at it now. */
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
info = (struct bfd_link_info *) inf;
|
|
htab = elf32_arm_hash_table (info);
|
|
|
|
if (htab->root.dynamic_sections_created
|
|
&& h->plt.refcount > 0)
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (info->shared
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
|
|
{
|
|
asection *s = htab->splt;
|
|
|
|
/* If this is the first .plt entry, make room for the special
|
|
first entry. */
|
|
if (s->size == 0)
|
|
s->size += htab->plt_header_size;
|
|
|
|
h->plt.offset = s->size;
|
|
|
|
/* If we will insert a Thumb trampoline before this PLT, leave room
|
|
for it. */
|
|
if (!htab->use_blx && eh->plt_thumb_refcount > 0)
|
|
{
|
|
h->plt.offset += PLT_THUMB_STUB_SIZE;
|
|
s->size += PLT_THUMB_STUB_SIZE;
|
|
}
|
|
|
|
/* If this symbol is not defined in a regular file, and we are
|
|
not generating a shared library, then set the symbol to this
|
|
location in the .plt. This is required to make function
|
|
pointers compare as equal between the normal executable and
|
|
the shared library. */
|
|
if (! info->shared
|
|
&& !h->def_regular)
|
|
{
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = h->plt.offset;
|
|
|
|
/* Make sure the function is not marked as Thumb, in case
|
|
it is the target of an ABS32 relocation, which will
|
|
point to the PLT entry. */
|
|
if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
|
|
h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
|
|
}
|
|
|
|
/* Make room for this entry. */
|
|
s->size += htab->plt_entry_size;
|
|
|
|
if (!htab->symbian_p)
|
|
{
|
|
/* We also need to make an entry in the .got.plt section, which
|
|
will be placed in the .got section by the linker script. */
|
|
eh->plt_got_offset = htab->sgotplt->size;
|
|
htab->sgotplt->size += 4;
|
|
}
|
|
|
|
/* We also need to make an entry in the .rel.plt section. */
|
|
htab->srelplt->size += sizeof (Elf32_External_Rel);
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
if (h->got.refcount > 0)
|
|
{
|
|
asection *s;
|
|
bfd_boolean dyn;
|
|
int tls_type = elf32_arm_hash_entry (h)->tls_type;
|
|
int indx;
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (!htab->symbian_p)
|
|
{
|
|
s = htab->sgot;
|
|
h->got.offset = s->size;
|
|
|
|
if (tls_type == GOT_UNKNOWN)
|
|
abort ();
|
|
|
|
if (tls_type == GOT_NORMAL)
|
|
/* Non-TLS symbols need one GOT slot. */
|
|
s->size += 4;
|
|
else
|
|
{
|
|
if (tls_type & GOT_TLS_GD)
|
|
/* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
|
|
s->size += 8;
|
|
if (tls_type & GOT_TLS_IE)
|
|
/* R_ARM_TLS_IE32 needs one GOT slot. */
|
|
s->size += 4;
|
|
}
|
|
|
|
dyn = htab->root.dynamic_sections_created;
|
|
|
|
indx = 0;
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
|
&& (!info->shared
|
|
|| !SYMBOL_REFERENCES_LOCAL (info, h)))
|
|
indx = h->dynindx;
|
|
|
|
if (tls_type != GOT_NORMAL
|
|
&& (info->shared || indx != 0)
|
|
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
if (tls_type & GOT_TLS_IE)
|
|
htab->srelgot->size += sizeof (Elf32_External_Rel);
|
|
|
|
if (tls_type & GOT_TLS_GD)
|
|
htab->srelgot->size += sizeof (Elf32_External_Rel);
|
|
|
|
if ((tls_type & GOT_TLS_GD) && indx != 0)
|
|
htab->srelgot->size += sizeof (Elf32_External_Rel);
|
|
}
|
|
else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& (info->shared
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
|
htab->srelgot->size += sizeof (Elf32_External_Rel);
|
|
}
|
|
}
|
|
else
|
|
h->got.offset = (bfd_vma) -1;
|
|
|
|
if (eh->relocs_copied == NULL)
|
|
return TRUE;
|
|
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
|
defined in regular objects. For the normal shared case, discard
|
|
space for pc-relative relocs that have become local due to symbol
|
|
visibility changes. */
|
|
|
|
if (info->shared || htab->root.is_relocatable_executable)
|
|
{
|
|
/* The only reloc that uses pc_count is R_ARM_REL32, which will
|
|
appear on something like ".long foo - .". We want calls to
|
|
protected symbols to resolve directly to the function rather
|
|
than going via the plt. If people want function pointer
|
|
comparisons to work as expected then they should avoid
|
|
writing assembly like ".long foo - .". */
|
|
if (SYMBOL_CALLS_LOCAL (info, h))
|
|
{
|
|
struct elf32_arm_relocs_copied **pp;
|
|
|
|
for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
|
|
{
|
|
p->count -= p->pc_count;
|
|
p->pc_count = 0;
|
|
if (p->count == 0)
|
|
*pp = p->next;
|
|
else
|
|
pp = &p->next;
|
|
}
|
|
}
|
|
|
|
/* Also discard relocs on undefined weak syms with non-default
|
|
visibility. */
|
|
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
|
&& h->root.type == bfd_link_hash_undefweak)
|
|
eh->relocs_copied = NULL;
|
|
else if (htab->root.is_relocatable_executable && h->dynindx == -1
|
|
&& h->root.type == bfd_link_hash_new)
|
|
{
|
|
/* Output absolute symbols so that we can create relocations
|
|
against them. For normal symbols we output a relocation
|
|
against the section that contains them. */
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
symbols which turn out to need copy relocs or are not
|
|
dynamic. */
|
|
|
|
if (!h->non_got_ref
|
|
&& ((h->def_dynamic
|
|
&& !h->def_regular)
|
|
|| (htab->root.dynamic_sections_created
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
relocs. */
|
|
if (h->dynindx != -1)
|
|
goto keep;
|
|
}
|
|
|
|
eh->relocs_copied = NULL;
|
|
|
|
keep: ;
|
|
}
|
|
|
|
/* Finally, allocate space. */
|
|
for (p = eh->relocs_copied; p != NULL; p = p->next)
|
|
{
|
|
asection *sreloc = elf_section_data (p->section)->sreloc;
|
|
sreloc->size += p->count * sizeof (Elf32_External_Rel);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Find any dynamic relocs that apply to read-only sections. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
|
|
{
|
|
struct elf32_arm_link_hash_entry *eh;
|
|
struct elf32_arm_relocs_copied *p;
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
for (p = eh->relocs_copied; p != NULL; p = p->next)
|
|
{
|
|
asection *s = p->section;
|
|
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
|
{
|
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
|
|
|
info->flags |= DF_TEXTREL;
|
|
|
|
/* Not an error, just cut short the traversal. */
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Set the sizes of the dynamic sections. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
|
|
struct bfd_link_info * info)
|
|
{
|
|
bfd * dynobj;
|
|
asection * s;
|
|
bfd_boolean plt;
|
|
bfd_boolean relocs;
|
|
bfd *ibfd;
|
|
struct elf32_arm_link_hash_table *htab;
|
|
|
|
htab = elf32_arm_hash_table (info);
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
BFD_ASSERT (dynobj != NULL);
|
|
check_use_blx (htab);
|
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
/* Set the contents of the .interp section to the interpreter. */
|
|
if (info->executable)
|
|
{
|
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
|
BFD_ASSERT (s != NULL);
|
|
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
|
}
|
|
}
|
|
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
|
relocs. */
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
|
{
|
|
bfd_signed_vma *local_got;
|
|
bfd_signed_vma *end_local_got;
|
|
char *local_tls_type;
|
|
bfd_size_type locsymcount;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
asection *srel;
|
|
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
|
continue;
|
|
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
|
{
|
|
struct elf32_arm_relocs_copied *p;
|
|
|
|
for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
|
|
{
|
|
if (!bfd_is_abs_section (p->section)
|
|
&& bfd_is_abs_section (p->section->output_section))
|
|
{
|
|
/* Input section has been discarded, either because
|
|
it is a copy of a linkonce section or due to
|
|
linker script /DISCARD/, so we'll be discarding
|
|
the relocs too. */
|
|
}
|
|
else if (p->count != 0)
|
|
{
|
|
srel = elf_section_data (p->section)->sreloc;
|
|
srel->size += p->count * sizeof (Elf32_External_Rel);
|
|
if ((p->section->output_section->flags & SEC_READONLY) != 0)
|
|
info->flags |= DF_TEXTREL;
|
|
}
|
|
}
|
|
}
|
|
|
|
local_got = elf_local_got_refcounts (ibfd);
|
|
if (!local_got)
|
|
continue;
|
|
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
|
locsymcount = symtab_hdr->sh_info;
|
|
end_local_got = local_got + locsymcount;
|
|
local_tls_type = elf32_arm_local_got_tls_type (ibfd);
|
|
s = htab->sgot;
|
|
srel = htab->srelgot;
|
|
for (; local_got < end_local_got; ++local_got, ++local_tls_type)
|
|
{
|
|
if (*local_got > 0)
|
|
{
|
|
*local_got = s->size;
|
|
if (*local_tls_type & GOT_TLS_GD)
|
|
/* TLS_GD relocs need an 8-byte structure in the GOT. */
|
|
s->size += 8;
|
|
if (*local_tls_type & GOT_TLS_IE)
|
|
s->size += 4;
|
|
if (*local_tls_type == GOT_NORMAL)
|
|
s->size += 4;
|
|
|
|
if (info->shared || *local_tls_type == GOT_TLS_GD)
|
|
srel->size += sizeof (Elf32_External_Rel);
|
|
}
|
|
else
|
|
*local_got = (bfd_vma) -1;
|
|
}
|
|
}
|
|
|
|
if (htab->tls_ldm_got.refcount > 0)
|
|
{
|
|
/* Allocate two GOT entries and one dynamic relocation (if necessary)
|
|
for R_ARM_TLS_LDM32 relocations. */
|
|
htab->tls_ldm_got.offset = htab->sgot->size;
|
|
htab->sgot->size += 8;
|
|
if (info->shared)
|
|
htab->srelgot->size += sizeof (Elf32_External_Rel);
|
|
}
|
|
else
|
|
htab->tls_ldm_got.offset = -1;
|
|
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
|
sym dynamic relocs. */
|
|
elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
|
|
|
|
/* The check_relocs and adjust_dynamic_symbol entry points have
|
|
determined the sizes of the various dynamic sections. Allocate
|
|
memory for them. */
|
|
plt = FALSE;
|
|
relocs = FALSE;
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
|
{
|
|
const char * name;
|
|
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
|
continue;
|
|
|
|
/* It's OK to base decisions on the section name, because none
|
|
of the dynobj section names depend upon the input files. */
|
|
name = bfd_get_section_name (dynobj, s);
|
|
|
|
if (strcmp (name, ".plt") == 0)
|
|
{
|
|
/* Remember whether there is a PLT. */
|
|
plt = s->size != 0;
|
|
}
|
|
else if (strncmp (name, ".rel", 4) == 0)
|
|
{
|
|
if (s->size != 0)
|
|
{
|
|
/* Remember whether there are any reloc sections other
|
|
than .rel.plt. */
|
|
if (strcmp (name, ".rel.plt") != 0)
|
|
relocs = TRUE;
|
|
|
|
/* We use the reloc_count field as a counter if we need
|
|
to copy relocs into the output file. */
|
|
s->reloc_count = 0;
|
|
}
|
|
}
|
|
else if (strncmp (name, ".got", 4) != 0
|
|
&& strcmp (name, ".dynbss") != 0)
|
|
{
|
|
/* It's not one of our sections, so don't allocate space. */
|
|
continue;
|
|
}
|
|
|
|
if (s->size == 0)
|
|
{
|
|
/* If we don't need this section, strip it from the
|
|
output file. This is mostly to handle .rel.bss and
|
|
.rel.plt. We must create both sections in
|
|
create_dynamic_sections, because they must be created
|
|
before the linker maps input sections to output
|
|
sections. The linker does that before
|
|
adjust_dynamic_symbol is called, and it is that
|
|
function which decides whether anything needs to go
|
|
into these sections. */
|
|
s->flags |= SEC_EXCLUDE;
|
|
continue;
|
|
}
|
|
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
|
continue;
|
|
|
|
/* Allocate memory for the section contents. */
|
|
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
|
if (s->contents == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
/* Add some entries to the .dynamic section. We fill in the
|
|
values later, in elf32_arm_finish_dynamic_sections, but we
|
|
must add the entries now so that we get the correct size for
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
|
dynamic linker and used by the debugger. */
|
|
#define add_dynamic_entry(TAG, VAL) \
|
|
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
|
|
|
if (info->executable)
|
|
{
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (plt)
|
|
{
|
|
if ( !add_dynamic_entry (DT_PLTGOT, 0)
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_REL)
|
|
|| !add_dynamic_entry (DT_JMPREL, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (relocs)
|
|
{
|
|
if ( !add_dynamic_entry (DT_REL, 0)
|
|
|| !add_dynamic_entry (DT_RELSZ, 0)
|
|
|| !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
|
|
return FALSE;
|
|
}
|
|
|
|
/* If any dynamic relocs apply to a read-only section,
|
|
then we need a DT_TEXTREL entry. */
|
|
if ((info->flags & DF_TEXTREL) == 0)
|
|
elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
|
|
(PTR) info);
|
|
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
|
{
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
|
return FALSE;
|
|
}
|
|
}
|
|
#undef add_dynamic_entry
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
|
dynamic sections here. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
|
|
struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
|
|
{
|
|
bfd * dynobj;
|
|
struct elf32_arm_link_hash_table *htab;
|
|
struct elf32_arm_link_hash_entry *eh;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
htab = elf32_arm_hash_table (info);
|
|
eh = (struct elf32_arm_link_hash_entry *) h;
|
|
|
|
if (h->plt.offset != (bfd_vma) -1)
|
|
{
|
|
asection * splt;
|
|
asection * srel;
|
|
bfd_byte *loc;
|
|
bfd_vma plt_index;
|
|
Elf_Internal_Rela rel;
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
|
it up. */
|
|
|
|
BFD_ASSERT (h->dynindx != -1);
|
|
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
|
srel = bfd_get_section_by_name (dynobj, ".rel.plt");
|
|
BFD_ASSERT (splt != NULL && srel != NULL);
|
|
|
|
/* Fill in the entry in the procedure linkage table. */
|
|
if (htab->symbian_p)
|
|
{
|
|
unsigned i;
|
|
for (i = 0; i < htab->plt_entry_size / 4; ++i)
|
|
bfd_put_32 (output_bfd,
|
|
elf32_arm_symbian_plt_entry[i],
|
|
splt->contents + h->plt.offset + 4 * i);
|
|
|
|
/* Fill in the entry in the .rel.plt section. */
|
|
rel.r_offset = (splt->output_section->vma
|
|
+ splt->output_offset
|
|
+ h->plt.offset + 4 * (i - 1));
|
|
rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
|
|
|
|
/* Get the index in the procedure linkage table which
|
|
corresponds to this symbol. This is the index of this symbol
|
|
in all the symbols for which we are making plt entries. The
|
|
first entry in the procedure linkage table is reserved. */
|
|
plt_index = ((h->plt.offset - htab->plt_header_size)
|
|
/ htab->plt_entry_size);
|
|
}
|
|
else
|
|
{
|
|
bfd_vma got_offset;
|
|
bfd_vma got_displacement;
|
|
asection * sgot;
|
|
|
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
|
BFD_ASSERT (sgot != NULL);
|
|
|
|
/* Get the offset into the .got.plt table of the entry that
|
|
corresponds to this function. */
|
|
got_offset = eh->plt_got_offset;
|
|
|
|
/* Get the index in the procedure linkage table which
|
|
corresponds to this symbol. This is the index of this symbol
|
|
in all the symbols for which we are making plt entries. The
|
|
first three entries in .got.plt are reserved; after that
|
|
symbols appear in the same order as in .plt. */
|
|
plt_index = (got_offset - 12) / 4;
|
|
|
|
/* Calculate the displacement between the PLT slot and the
|
|
entry in the GOT. The eight-byte offset accounts for the
|
|
value produced by adding to pc in the first instruction
|
|
of the PLT stub. */
|
|
got_displacement = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ got_offset
|
|
- splt->output_section->vma
|
|
- splt->output_offset
|
|
- h->plt.offset
|
|
- 8);
|
|
|
|
BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
|
|
|
|
if (!htab->use_blx && eh->plt_thumb_refcount > 0)
|
|
{
|
|
bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
|
|
splt->contents + h->plt.offset - 4);
|
|
bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
|
|
splt->contents + h->plt.offset - 2);
|
|
}
|
|
|
|
bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
|
|
splt->contents + h->plt.offset + 0);
|
|
bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
|
|
splt->contents + h->plt.offset + 4);
|
|
bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
|
|
splt->contents + h->plt.offset + 8);
|
|
#ifdef FOUR_WORD_PLT
|
|
bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
|
|
splt->contents + h->plt.offset + 12);
|
|
#endif
|
|
|
|
/* Fill in the entry in the global offset table. */
|
|
bfd_put_32 (output_bfd,
|
|
(splt->output_section->vma
|
|
+ splt->output_offset),
|
|
sgot->contents + got_offset);
|
|
|
|
/* Fill in the entry in the .rel.plt section. */
|
|
rel.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ got_offset);
|
|
rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
|
|
}
|
|
|
|
loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
|
|
|
|
if (!h->def_regular)
|
|
{
|
|
/* Mark the symbol as undefined, rather than as defined in
|
|
the .plt section. Leave the value alone. */
|
|
sym->st_shndx = SHN_UNDEF;
|
|
/* If the symbol is weak, we do need to clear the value.
|
|
Otherwise, the PLT entry would provide a definition for
|
|
the symbol even if the symbol wasn't defined anywhere,
|
|
and so the symbol would never be NULL. */
|
|
if (!h->ref_regular_nonweak)
|
|
sym->st_value = 0;
|
|
}
|
|
}
|
|
|
|
if (h->got.offset != (bfd_vma) -1
|
|
&& (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
|
|
&& (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
|
|
{
|
|
asection * sgot;
|
|
asection * srel;
|
|
Elf_Internal_Rela rel;
|
|
bfd_byte *loc;
|
|
|
|
/* This symbol has an entry in the global offset table. Set it
|
|
up. */
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
|
srel = bfd_get_section_by_name (dynobj, ".rel.got");
|
|
BFD_ASSERT (sgot != NULL && srel != NULL);
|
|
|
|
rel.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ (h->got.offset &~ (bfd_vma) 1));
|
|
|
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
|
symbol is defined locally or was forced to be local because
|
|
of a version file, we just want to emit a RELATIVE reloc.
|
|
The entry in the global offset table will already have been
|
|
initialized in the relocate_section function. */
|
|
if (info->shared
|
|
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
|
{
|
|
BFD_ASSERT((h->got.offset & 1) != 0);
|
|
rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
|
|
}
|
|
else
|
|
{
|
|
BFD_ASSERT((h->got.offset & 1) == 0);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
|
rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
|
|
}
|
|
|
|
loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
|
|
}
|
|
|
|
if (h->needs_copy)
|
|
{
|
|
asection * s;
|
|
Elf_Internal_Rela rel;
|
|
bfd_byte *loc;
|
|
|
|
/* This symbol needs a copy reloc. Set it up. */
|
|
BFD_ASSERT (h->dynindx != -1
|
|
&& (h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak));
|
|
|
|
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
|
".rel.bss");
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
rel.r_offset = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
|
|
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
|
|
}
|
|
|
|
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
|
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
|
sym->st_shndx = SHN_ABS;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up the dynamic sections. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
|
|
{
|
|
bfd * dynobj;
|
|
asection * sgot;
|
|
asection * sdyn;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
|
BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
|
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
asection *splt;
|
|
Elf32_External_Dyn *dyncon, *dynconend;
|
|
struct elf32_arm_link_hash_table *htab;
|
|
|
|
htab = elf32_arm_hash_table (info);
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
|
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
|
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
|
|
|
for (; dyncon < dynconend; dyncon++)
|
|
{
|
|
Elf_Internal_Dyn dyn;
|
|
const char * name;
|
|
asection * s;
|
|
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
|
switch (dyn.d_tag)
|
|
{
|
|
unsigned int type;
|
|
|
|
default:
|
|
break;
|
|
|
|
case DT_HASH:
|
|
name = ".hash";
|
|
goto get_vma_if_bpabi;
|
|
case DT_STRTAB:
|
|
name = ".dynstr";
|
|
goto get_vma_if_bpabi;
|
|
case DT_SYMTAB:
|
|
name = ".dynsym";
|
|
goto get_vma_if_bpabi;
|
|
case DT_VERSYM:
|
|
name = ".gnu.version";
|
|
goto get_vma_if_bpabi;
|
|
case DT_VERDEF:
|
|
name = ".gnu.version_d";
|
|
goto get_vma_if_bpabi;
|
|
case DT_VERNEED:
|
|
name = ".gnu.version_r";
|
|
goto get_vma_if_bpabi;
|
|
|
|
case DT_PLTGOT:
|
|
name = ".got";
|
|
goto get_vma;
|
|
case DT_JMPREL:
|
|
name = ".rel.plt";
|
|
get_vma:
|
|
s = bfd_get_section_by_name (output_bfd, name);
|
|
BFD_ASSERT (s != NULL);
|
|
if (!htab->symbian_p)
|
|
dyn.d_un.d_ptr = s->vma;
|
|
else
|
|
/* In the BPABI, tags in the PT_DYNAMIC section point
|
|
at the file offset, not the memory address, for the
|
|
convenience of the post linker. */
|
|
dyn.d_un.d_ptr = s->filepos;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
|
|
get_vma_if_bpabi:
|
|
if (htab->symbian_p)
|
|
goto get_vma;
|
|
break;
|
|
|
|
case DT_PLTRELSZ:
|
|
s = bfd_get_section_by_name (output_bfd, ".rel.plt");
|
|
BFD_ASSERT (s != NULL);
|
|
dyn.d_un.d_val = s->size;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
|
|
case DT_RELSZ:
|
|
if (!htab->symbian_p)
|
|
{
|
|
/* My reading of the SVR4 ABI indicates that the
|
|
procedure linkage table relocs (DT_JMPREL) should be
|
|
included in the overall relocs (DT_REL). This is
|
|
what Solaris does. However, UnixWare can not handle
|
|
that case. Therefore, we override the DT_RELSZ entry
|
|
here to make it not include the JMPREL relocs. Since
|
|
the linker script arranges for .rel.plt to follow all
|
|
other relocation sections, we don't have to worry
|
|
about changing the DT_REL entry. */
|
|
s = bfd_get_section_by_name (output_bfd, ".rel.plt");
|
|
if (s != NULL)
|
|
dyn.d_un.d_val -= s->size;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
}
|
|
/* Fall through */
|
|
|
|
case DT_REL:
|
|
case DT_RELA:
|
|
case DT_RELASZ:
|
|
/* In the BPABI, the DT_REL tag must point at the file
|
|
offset, not the VMA, of the first relocation
|
|
section. So, we use code similar to that in
|
|
elflink.c, but do not check for SHF_ALLOC on the
|
|
relcoation section, since relocations sections are
|
|
never allocated under the BPABI. The comments above
|
|
about Unixware notwithstanding, we include all of the
|
|
relocations here. */
|
|
if (htab->symbian_p)
|
|
{
|
|
unsigned int i;
|
|
type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
|
|
? SHT_REL : SHT_RELA);
|
|
dyn.d_un.d_val = 0;
|
|
for (i = 1; i < elf_numsections (output_bfd); i++)
|
|
{
|
|
Elf_Internal_Shdr *hdr
|
|
= elf_elfsections (output_bfd)[i];
|
|
if (hdr->sh_type == type)
|
|
{
|
|
if (dyn.d_tag == DT_RELSZ
|
|
|| dyn.d_tag == DT_RELASZ)
|
|
dyn.d_un.d_val += hdr->sh_size;
|
|
else if ((ufile_ptr) hdr->sh_offset
|
|
<= dyn.d_un.d_val - 1)
|
|
dyn.d_un.d_val = hdr->sh_offset;
|
|
}
|
|
}
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
}
|
|
break;
|
|
|
|
/* Set the bottom bit of DT_INIT/FINI if the
|
|
corresponding function is Thumb. */
|
|
case DT_INIT:
|
|
name = info->init_function;
|
|
goto get_sym;
|
|
case DT_FINI:
|
|
name = info->fini_function;
|
|
get_sym:
|
|
/* If it wasn't set by elf_bfd_final_link
|
|
then there is nothing to adjust. */
|
|
if (dyn.d_un.d_val != 0)
|
|
{
|
|
struct elf_link_hash_entry * eh;
|
|
|
|
eh = elf_link_hash_lookup (elf_hash_table (info), name,
|
|
FALSE, FALSE, TRUE);
|
|
if (eh != (struct elf_link_hash_entry *) NULL
|
|
&& ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
|
|
{
|
|
dyn.d_un.d_val |= 1;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Fill in the first entry in the procedure linkage table. */
|
|
if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
|
|
{
|
|
bfd_vma got_displacement;
|
|
|
|
/* Calculate the displacement between the PLT slot and &GOT[0]. */
|
|
got_displacement = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
- splt->output_section->vma
|
|
- splt->output_offset
|
|
- 16);
|
|
|
|
bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
|
|
bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
|
|
bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
|
|
bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
|
|
#ifdef FOUR_WORD_PLT
|
|
/* The displacement value goes in the otherwise-unused last word of
|
|
the second entry. */
|
|
bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
|
|
#else
|
|
bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
|
|
#endif
|
|
}
|
|
|
|
/* UnixWare sets the entsize of .plt to 4, although that doesn't
|
|
really seem like the right value. */
|
|
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
|
|
}
|
|
|
|
/* Fill in the first three entries in the global offset table. */
|
|
if (sgot)
|
|
{
|
|
if (sgot->size > 0)
|
|
{
|
|
if (sdyn == NULL)
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
|
else
|
|
bfd_put_32 (output_bfd,
|
|
sdyn->output_section->vma + sdyn->output_offset,
|
|
sgot->contents);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
|
}
|
|
|
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
|
|
{
|
|
Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
i_ehdrp = elf_elfheader (abfd);
|
|
|
|
if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
|
|
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
|
|
else
|
|
i_ehdrp->e_ident[EI_OSABI] = 0;
|
|
i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
|
|
|
|
if (link_info)
|
|
{
|
|
globals = elf32_arm_hash_table (link_info);
|
|
if (globals->byteswap_code)
|
|
i_ehdrp->e_flags |= EF_ARM_BE8;
|
|
}
|
|
}
|
|
|
|
static enum elf_reloc_type_class
|
|
elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
|
|
{
|
|
switch ((int) ELF32_R_TYPE (rela->r_info))
|
|
{
|
|
case R_ARM_RELATIVE:
|
|
return reloc_class_relative;
|
|
case R_ARM_JUMP_SLOT:
|
|
return reloc_class_plt;
|
|
case R_ARM_COPY:
|
|
return reloc_class_copy;
|
|
default:
|
|
return reloc_class_normal;
|
|
}
|
|
}
|
|
|
|
/* Set the right machine number for an Arm ELF file. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
|
|
{
|
|
if (hdr->sh_type == SHT_NOTE)
|
|
*flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
|
|
{
|
|
bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
|
|
}
|
|
|
|
/* Return TRUE if this is an unwinding table entry. */
|
|
|
|
static bfd_boolean
|
|
is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
|
|
{
|
|
size_t len1, len2;
|
|
|
|
len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
|
|
len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
|
|
return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
|
|
|| strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
|
|
}
|
|
|
|
|
|
/* Set the type and flags for an ARM section. We do this by
|
|
the section name, which is a hack, but ought to work. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
|
|
{
|
|
const char * name;
|
|
|
|
name = bfd_get_section_name (abfd, sec);
|
|
|
|
if (is_arm_elf_unwind_section_name (abfd, name))
|
|
{
|
|
hdr->sh_type = SHT_ARM_EXIDX;
|
|
hdr->sh_flags |= SHF_LINK_ORDER;
|
|
}
|
|
else if (strcmp(name, ".ARM.attributes") == 0)
|
|
{
|
|
hdr->sh_type = SHT_ARM_ATTRIBUTES;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Parse an Arm EABI attributes section. */
|
|
static void
|
|
elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr)
|
|
{
|
|
bfd_byte *contents;
|
|
bfd_byte *p;
|
|
bfd_vma len;
|
|
|
|
contents = bfd_malloc (hdr->sh_size);
|
|
if (!contents)
|
|
return;
|
|
if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
|
|
hdr->sh_size))
|
|
{
|
|
free (contents);
|
|
return;
|
|
}
|
|
p = contents;
|
|
if (*(p++) == 'A')
|
|
{
|
|
len = hdr->sh_size - 1;
|
|
while (len > 0)
|
|
{
|
|
int namelen;
|
|
bfd_vma section_len;
|
|
|
|
section_len = bfd_get_32 (abfd, p);
|
|
p += 4;
|
|
if (section_len > len)
|
|
section_len = len;
|
|
len -= section_len;
|
|
namelen = strlen ((char *)p) + 1;
|
|
section_len -= namelen + 4;
|
|
if (strcmp((char *)p, "aeabi") != 0)
|
|
{
|
|
/* Vendor section. Ignore it. */
|
|
p += namelen + section_len;
|
|
}
|
|
else
|
|
{
|
|
p += namelen;
|
|
while (section_len > 0)
|
|
{
|
|
int tag;
|
|
unsigned int n;
|
|
unsigned int val;
|
|
bfd_vma subsection_len;
|
|
bfd_byte *end;
|
|
|
|
tag = read_unsigned_leb128 (abfd, p, &n);
|
|
p += n;
|
|
subsection_len = bfd_get_32 (abfd, p);
|
|
p += 4;
|
|
if (subsection_len > section_len)
|
|
subsection_len = section_len;
|
|
section_len -= subsection_len;
|
|
subsection_len -= n + 4;
|
|
end = p + subsection_len;
|
|
switch (tag)
|
|
{
|
|
case Tag_File:
|
|
while (p < end)
|
|
{
|
|
bfd_boolean is_string;
|
|
|
|
tag = read_unsigned_leb128 (abfd, p, &n);
|
|
p += n;
|
|
if (tag == 4 || tag == 5)
|
|
is_string = 1;
|
|
else if (tag < 32)
|
|
is_string = 0;
|
|
else
|
|
is_string = (tag & 1) != 0;
|
|
if (tag == Tag_compatibility)
|
|
{
|
|
val = read_unsigned_leb128 (abfd, p, &n);
|
|
p += n;
|
|
elf32_arm_add_eabi_attr_compat (abfd, val,
|
|
(char *)p);
|
|
p += strlen ((char *)p) + 1;
|
|
}
|
|
else if (is_string)
|
|
{
|
|
elf32_arm_add_eabi_attr_string (abfd, tag,
|
|
(char *)p);
|
|
p += strlen ((char *)p) + 1;
|
|
}
|
|
else
|
|
{
|
|
val = read_unsigned_leb128 (abfd, p, &n);
|
|
p += n;
|
|
elf32_arm_add_eabi_attr_int (abfd, tag, val);
|
|
}
|
|
}
|
|
break;
|
|
case Tag_Section:
|
|
case Tag_Symbol:
|
|
/* Don't have anywhere convenient to attach these.
|
|
Fall through for now. */
|
|
default:
|
|
/* Ignore things we don't kow about. */
|
|
p += subsection_len;
|
|
subsection_len = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
free (contents);
|
|
}
|
|
|
|
/* Handle an ARM specific section when reading an object file. This is
|
|
called when bfd_section_from_shdr finds a section with an unknown
|
|
type. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_section_from_shdr (bfd *abfd,
|
|
Elf_Internal_Shdr * hdr,
|
|
const char *name,
|
|
int shindex)
|
|
{
|
|
/* There ought to be a place to keep ELF backend specific flags, but
|
|
at the moment there isn't one. We just keep track of the
|
|
sections by their name, instead. Fortunately, the ABI gives
|
|
names for all the ARM specific sections, so we will probably get
|
|
away with this. */
|
|
switch (hdr->sh_type)
|
|
{
|
|
case SHT_ARM_EXIDX:
|
|
case SHT_ARM_PREEMPTMAP:
|
|
case SHT_ARM_ATTRIBUTES:
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
|
|
return FALSE;
|
|
|
|
if (hdr->sh_type == SHT_ARM_ATTRIBUTES)
|
|
elf32_arm_parse_attributes(abfd, hdr);
|
|
return TRUE;
|
|
}
|
|
|
|
/* A structure used to record a list of sections, independently
|
|
of the next and prev fields in the asection structure. */
|
|
typedef struct section_list
|
|
{
|
|
asection * sec;
|
|
struct section_list * next;
|
|
struct section_list * prev;
|
|
}
|
|
section_list;
|
|
|
|
/* Unfortunately we need to keep a list of sections for which
|
|
an _arm_elf_section_data structure has been allocated. This
|
|
is because it is possible for functions like elf32_arm_write_section
|
|
to be called on a section which has had an elf_data_structure
|
|
allocated for it (and so the used_by_bfd field is valid) but
|
|
for which the ARM extended version of this structure - the
|
|
_arm_elf_section_data structure - has not been allocated. */
|
|
static section_list * sections_with_arm_elf_section_data = NULL;
|
|
|
|
static void
|
|
record_section_with_arm_elf_section_data (asection * sec)
|
|
{
|
|
struct section_list * entry;
|
|
|
|
entry = bfd_malloc (sizeof (* entry));
|
|
if (entry == NULL)
|
|
return;
|
|
entry->sec = sec;
|
|
entry->next = sections_with_arm_elf_section_data;
|
|
entry->prev = NULL;
|
|
if (entry->next != NULL)
|
|
entry->next->prev = entry;
|
|
sections_with_arm_elf_section_data = entry;
|
|
}
|
|
|
|
static struct section_list *
|
|
find_arm_elf_section_entry (asection * sec)
|
|
{
|
|
struct section_list * entry;
|
|
static struct section_list * last_entry = NULL;
|
|
|
|
/* This is a short cut for the typical case where the sections are added
|
|
to the sections_with_arm_elf_section_data list in forward order and
|
|
then looked up here in backwards order. This makes a real difference
|
|
to the ld-srec/sec64k.exp linker test. */
|
|
entry = sections_with_arm_elf_section_data;
|
|
if (last_entry != NULL)
|
|
{
|
|
if (last_entry->sec == sec)
|
|
entry = last_entry;
|
|
else if (last_entry->next != NULL
|
|
&& last_entry->next->sec == sec)
|
|
entry = last_entry->next;
|
|
}
|
|
|
|
for (; entry; entry = entry->next)
|
|
if (entry->sec == sec)
|
|
break;
|
|
|
|
if (entry)
|
|
/* Record the entry prior to this one - it is the entry we are most
|
|
likely to want to locate next time. Also this way if we have been
|
|
called from unrecord_section_with_arm_elf_section_data() we will not
|
|
be caching a pointer that is about to be freed. */
|
|
last_entry = entry->prev;
|
|
|
|
return entry;
|
|
}
|
|
|
|
static _arm_elf_section_data *
|
|
get_arm_elf_section_data (asection * sec)
|
|
{
|
|
struct section_list * entry;
|
|
|
|
entry = find_arm_elf_section_entry (sec);
|
|
|
|
if (entry)
|
|
return elf32_arm_section_data (entry->sec);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
unrecord_section_with_arm_elf_section_data (asection * sec)
|
|
{
|
|
struct section_list * entry;
|
|
|
|
entry = find_arm_elf_section_entry (sec);
|
|
|
|
if (entry)
|
|
{
|
|
if (entry->prev != NULL)
|
|
entry->prev->next = entry->next;
|
|
if (entry->next != NULL)
|
|
entry->next->prev = entry->prev;
|
|
if (entry == sections_with_arm_elf_section_data)
|
|
sections_with_arm_elf_section_data = entry->next;
|
|
free (entry);
|
|
}
|
|
}
|
|
|
|
/* Called for each symbol. Builds a section map based on mapping symbols.
|
|
Does not alter any of the symbols. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_output_symbol_hook (struct bfd_link_info *info,
|
|
const char *name,
|
|
Elf_Internal_Sym *elfsym,
|
|
asection *input_sec,
|
|
struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
|
|
{
|
|
int mapcount;
|
|
elf32_arm_section_map *map;
|
|
elf32_arm_section_map *newmap;
|
|
_arm_elf_section_data *arm_data;
|
|
struct elf32_arm_link_hash_table *globals;
|
|
|
|
/* Only do this on final link. */
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
/* Only build a map if we need to byteswap code. */
|
|
globals = elf32_arm_hash_table (info);
|
|
if (!globals->byteswap_code)
|
|
return TRUE;
|
|
|
|
/* We only want mapping symbols. */
|
|
if (! bfd_is_arm_mapping_symbol_name (name))
|
|
return TRUE;
|
|
|
|
/* If this section has not been allocated an _arm_elf_section_data
|
|
structure then we cannot record anything. */
|
|
arm_data = get_arm_elf_section_data (input_sec);
|
|
if (arm_data == NULL)
|
|
return TRUE;
|
|
|
|
mapcount = arm_data->mapcount + 1;
|
|
map = arm_data->map;
|
|
|
|
/* TODO: This may be inefficient, but we probably don't usually have many
|
|
mapping symbols per section. */
|
|
newmap = bfd_realloc (map, mapcount * sizeof (* map));
|
|
if (newmap != NULL)
|
|
{
|
|
arm_data->map = newmap;
|
|
arm_data->mapcount = mapcount;
|
|
|
|
newmap[mapcount - 1].vma = elfsym->st_value;
|
|
newmap[mapcount - 1].type = name[1];
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Allocate target specific section data. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_new_section_hook (bfd *abfd, asection *sec)
|
|
{
|
|
_arm_elf_section_data *sdata;
|
|
bfd_size_type amt = sizeof (*sdata);
|
|
|
|
sdata = bfd_zalloc (abfd, amt);
|
|
if (sdata == NULL)
|
|
return FALSE;
|
|
sec->used_by_bfd = sdata;
|
|
|
|
record_section_with_arm_elf_section_data (sec);
|
|
|
|
return _bfd_elf_new_section_hook (abfd, sec);
|
|
}
|
|
|
|
|
|
/* Used to order a list of mapping symbols by address. */
|
|
|
|
static int
|
|
elf32_arm_compare_mapping (const void * a, const void * b)
|
|
{
|
|
return ((const elf32_arm_section_map *) a)->vma
|
|
> ((const elf32_arm_section_map *) b)->vma;
|
|
}
|
|
|
|
|
|
/* Do code byteswapping. Return FALSE afterwards so that the section is
|
|
written out as normal. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
|
|
bfd_byte *contents)
|
|
{
|
|
int mapcount;
|
|
_arm_elf_section_data *arm_data;
|
|
elf32_arm_section_map *map;
|
|
bfd_vma ptr;
|
|
bfd_vma end;
|
|
bfd_vma offset;
|
|
bfd_byte tmp;
|
|
int i;
|
|
|
|
/* If this section has not been allocated an _arm_elf_section_data
|
|
structure then we cannot record anything. */
|
|
arm_data = get_arm_elf_section_data (sec);
|
|
if (arm_data == NULL)
|
|
return FALSE;
|
|
|
|
mapcount = arm_data->mapcount;
|
|
map = arm_data->map;
|
|
|
|
if (mapcount == 0)
|
|
return FALSE;
|
|
|
|
qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
|
|
|
|
offset = sec->output_section->vma + sec->output_offset;
|
|
ptr = map[0].vma - offset;
|
|
for (i = 0; i < mapcount; i++)
|
|
{
|
|
if (i == mapcount - 1)
|
|
end = sec->size;
|
|
else
|
|
end = map[i + 1].vma - offset;
|
|
|
|
switch (map[i].type)
|
|
{
|
|
case 'a':
|
|
/* Byte swap code words. */
|
|
while (ptr + 3 < end)
|
|
{
|
|
tmp = contents[ptr];
|
|
contents[ptr] = contents[ptr + 3];
|
|
contents[ptr + 3] = tmp;
|
|
tmp = contents[ptr + 1];
|
|
contents[ptr + 1] = contents[ptr + 2];
|
|
contents[ptr + 2] = tmp;
|
|
ptr += 4;
|
|
}
|
|
break;
|
|
|
|
case 't':
|
|
/* Byte swap code halfwords. */
|
|
while (ptr + 1 < end)
|
|
{
|
|
tmp = contents[ptr];
|
|
contents[ptr] = contents[ptr + 1];
|
|
contents[ptr + 1] = tmp;
|
|
ptr += 2;
|
|
}
|
|
break;
|
|
|
|
case 'd':
|
|
/* Leave data alone. */
|
|
break;
|
|
}
|
|
ptr = end;
|
|
}
|
|
|
|
free (map);
|
|
arm_data->mapcount = 0;
|
|
arm_data->map = NULL;
|
|
unrecord_section_with_arm_elf_section_data (sec);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
|
|
asection * sec,
|
|
void * ignore ATTRIBUTE_UNUSED)
|
|
{
|
|
unrecord_section_with_arm_elf_section_data (sec);
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_arm_close_and_cleanup (bfd * abfd)
|
|
{
|
|
bfd_map_over_sections (abfd, unrecord_section_via_map_over_sections, NULL);
|
|
|
|
return _bfd_elf_close_and_cleanup (abfd);
|
|
}
|
|
|
|
/* Display STT_ARM_TFUNC symbols as functions. */
|
|
|
|
static void
|
|
elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asymbol *asym)
|
|
{
|
|
elf_symbol_type *elfsym = (elf_symbol_type *) asym;
|
|
|
|
if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
|
|
elfsym->symbol.flags |= BSF_FUNCTION;
|
|
}
|
|
|
|
|
|
/* Mangle thumb function symbols as we read them in. */
|
|
|
|
static void
|
|
elf32_arm_swap_symbol_in (bfd * abfd,
|
|
const void *psrc,
|
|
const void *pshn,
|
|
Elf_Internal_Sym *dst)
|
|
{
|
|
bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
|
|
|
|
/* New EABI objects mark thumb function symbols by setting the low bit of
|
|
the address. Turn these into STT_ARM_TFUNC. */
|
|
if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
|
|
&& (dst->st_value & 1))
|
|
{
|
|
dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
|
|
dst->st_value &= ~(bfd_vma) 1;
|
|
}
|
|
}
|
|
|
|
|
|
/* Mangle thumb function symbols as we write them out. */
|
|
|
|
static void
|
|
elf32_arm_swap_symbol_out (bfd *abfd,
|
|
const Elf_Internal_Sym *src,
|
|
void *cdst,
|
|
void *shndx)
|
|
{
|
|
Elf_Internal_Sym newsym;
|
|
|
|
/* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
|
|
of the address set, as per the new EABI. We do this unconditionally
|
|
because objcopy does not set the elf header flags until after
|
|
it writes out the symbol table. */
|
|
if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
|
|
{
|
|
newsym = *src;
|
|
newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
|
|
newsym.st_value |= 1;
|
|
|
|
src = &newsym;
|
|
}
|
|
bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
|
|
}
|
|
|
|
/* Add the PT_ARM_EXIDX program header. */
|
|
|
|
static bfd_boolean
|
|
elf32_arm_modify_segment_map (bfd *abfd,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED)
|
|
{
|
|
struct elf_segment_map *m;
|
|
asection *sec;
|
|
|
|
sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
|
|
if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
|
|
{
|
|
/* If there is already a PT_ARM_EXIDX header, then we do not
|
|
want to add another one. This situation arises when running
|
|
"strip"; the input binary already has the header. */
|
|
m = elf_tdata (abfd)->segment_map;
|
|
while (m && m->p_type != PT_ARM_EXIDX)
|
|
m = m->next;
|
|
if (!m)
|
|
{
|
|
m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
|
|
if (m == NULL)
|
|
return FALSE;
|
|
m->p_type = PT_ARM_EXIDX;
|
|
m->count = 1;
|
|
m->sections[0] = sec;
|
|
|
|
m->next = elf_tdata (abfd)->segment_map;
|
|
elf_tdata (abfd)->segment_map = m;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* We may add a PT_ARM_EXIDX program header. */
|
|
|
|
static int
|
|
elf32_arm_additional_program_headers (bfd *abfd)
|
|
{
|
|
asection *sec;
|
|
|
|
sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
|
|
if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* We use this to override swap_symbol_in and swap_symbol_out. */
|
|
const struct elf_size_info elf32_arm_size_info = {
|
|
sizeof (Elf32_External_Ehdr),
|
|
sizeof (Elf32_External_Phdr),
|
|
sizeof (Elf32_External_Shdr),
|
|
sizeof (Elf32_External_Rel),
|
|
sizeof (Elf32_External_Rela),
|
|
sizeof (Elf32_External_Sym),
|
|
sizeof (Elf32_External_Dyn),
|
|
sizeof (Elf_External_Note),
|
|
4,
|
|
1,
|
|
32, 2,
|
|
ELFCLASS32, EV_CURRENT,
|
|
bfd_elf32_write_out_phdrs,
|
|
bfd_elf32_write_shdrs_and_ehdr,
|
|
bfd_elf32_write_relocs,
|
|
elf32_arm_swap_symbol_in,
|
|
elf32_arm_swap_symbol_out,
|
|
bfd_elf32_slurp_reloc_table,
|
|
bfd_elf32_slurp_symbol_table,
|
|
bfd_elf32_swap_dyn_in,
|
|
bfd_elf32_swap_dyn_out,
|
|
bfd_elf32_swap_reloc_in,
|
|
bfd_elf32_swap_reloc_out,
|
|
bfd_elf32_swap_reloca_in,
|
|
bfd_elf32_swap_reloca_out
|
|
};
|
|
|
|
#define ELF_ARCH bfd_arch_arm
|
|
#define ELF_MACHINE_CODE EM_ARM
|
|
#ifdef __QNXTARGET__
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
#else
|
|
#define ELF_MAXPAGESIZE 0x8000
|
|
#endif
|
|
#define ELF_MINPAGESIZE 0x1000
|
|
|
|
#define bfd_elf32_mkobject elf32_arm_mkobject
|
|
|
|
#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
|
|
#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
|
|
#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
|
|
#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
|
|
#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
|
|
#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
|
|
#define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
|
|
#define bfd_elf32_new_section_hook elf32_arm_new_section_hook
|
|
#define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
|
|
#define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
|
|
#define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link
|
|
|
|
#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
|
|
#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
|
|
#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
|
|
#define elf_backend_check_relocs elf32_arm_check_relocs
|
|
#define elf_backend_relocate_section elf32_arm_relocate_section
|
|
#define elf_backend_write_section elf32_arm_write_section
|
|
#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
|
|
#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
|
|
#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
|
|
#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
|
|
#define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
|
|
#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
|
|
#define elf_backend_post_process_headers elf32_arm_post_process_headers
|
|
#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
|
|
#define elf_backend_object_p elf32_arm_object_p
|
|
#define elf_backend_section_flags elf32_arm_section_flags
|
|
#define elf_backend_fake_sections elf32_arm_fake_sections
|
|
#define elf_backend_section_from_shdr elf32_arm_section_from_shdr
|
|
#define elf_backend_final_write_processing elf32_arm_final_write_processing
|
|
#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
|
|
#define elf_backend_symbol_processing elf32_arm_symbol_processing
|
|
#define elf_backend_size_info elf32_arm_size_info
|
|
#define elf_backend_modify_segment_map elf32_arm_modify_segment_map
|
|
#define elf_backend_additional_program_headers \
|
|
elf32_arm_additional_program_headers
|
|
|
|
#define elf_backend_can_refcount 1
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_plt_readonly 1
|
|
#define elf_backend_want_got_plt 1
|
|
#define elf_backend_want_plt_sym 0
|
|
#define elf_backend_may_use_rel_p 1
|
|
#define elf_backend_may_use_rela_p 0
|
|
#define elf_backend_default_use_rela_p 0
|
|
#define elf_backend_rela_normal 0
|
|
|
|
#define elf_backend_got_header_size 12
|
|
|
|
#include "elf32-target.h"
|
|
|
|
/* VxWorks Targets */
|
|
|
|
#undef TARGET_LITTLE_SYM
|
|
#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
|
|
#undef TARGET_LITTLE_NAME
|
|
#define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
|
|
#undef TARGET_BIG_SYM
|
|
#define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
|
|
#undef TARGET_BIG_NAME
|
|
#define TARGET_BIG_NAME "elf32-bigarm-vxworks"
|
|
|
|
/* Like elf32_arm_link_hash_table_create -- but overrides
|
|
appropriately for VxWorks. */
|
|
static struct bfd_link_hash_table *
|
|
elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
|
|
{
|
|
struct bfd_link_hash_table *ret;
|
|
|
|
ret = elf32_arm_link_hash_table_create (abfd);
|
|
if (ret)
|
|
{
|
|
struct elf32_arm_link_hash_table *htab
|
|
= (struct elf32_arm_link_hash_table *)ret;
|
|
htab->use_rel = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#undef elf32_bed
|
|
#define elf32_bed elf32_arm_vxworks_bed
|
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|
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#undef bfd_elf32_bfd_link_hash_table_create
|
|
#define bfd_elf32_bfd_link_hash_table_create \
|
|
elf32_arm_vxworks_link_hash_table_create
|
|
|
|
#undef elf_backend_may_use_rel_p
|
|
#define elf_backend_may_use_rel_p 0
|
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#undef elf_backend_may_use_rela_p
|
|
#define elf_backend_may_use_rela_p 1
|
|
#undef elf_backend_default_use_rela_p
|
|
#define elf_backend_default_use_rela_p 1
|
|
#undef elf_backend_rela_normal
|
|
#define elf_backend_rela_normal 1
|
|
|
|
#include "elf32-target.h"
|
|
|
|
|
|
/* Symbian OS Targets */
|
|
|
|
#undef TARGET_LITTLE_SYM
|
|
#define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
|
|
#undef TARGET_LITTLE_NAME
|
|
#define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
|
|
#undef TARGET_BIG_SYM
|
|
#define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
|
|
#undef TARGET_BIG_NAME
|
|
#define TARGET_BIG_NAME "elf32-bigarm-symbian"
|
|
|
|
/* Like elf32_arm_link_hash_table_create -- but overrides
|
|
appropriately for Symbian OS. */
|
|
static struct bfd_link_hash_table *
|
|
elf32_arm_symbian_link_hash_table_create (bfd *abfd)
|
|
{
|
|
struct bfd_link_hash_table *ret;
|
|
|
|
ret = elf32_arm_link_hash_table_create (abfd);
|
|
if (ret)
|
|
{
|
|
struct elf32_arm_link_hash_table *htab
|
|
= (struct elf32_arm_link_hash_table *)ret;
|
|
/* There is no PLT header for Symbian OS. */
|
|
htab->plt_header_size = 0;
|
|
/* The PLT entries are each three instructions. */
|
|
htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
|
|
htab->symbian_p = 1;
|
|
/* Symbian uses armv5t or above, so use_blx is always true. */
|
|
htab->use_blx = 1;
|
|
htab->root.is_relocatable_executable = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const struct bfd_elf_special_section
|
|
elf32_arm_symbian_special_sections[] =
|
|
{
|
|
/* In a BPABI executable, the dynamic linking sections do not go in
|
|
the loadable read-only segment. The post-linker may wish to
|
|
refer to these sections, but they are not part of the final
|
|
program image. */
|
|
{ ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
|
|
{ ".dynstr", 7, 0, SHT_STRTAB, 0 },
|
|
{ ".dynsym", 7, 0, SHT_DYNSYM, 0 },
|
|
{ ".got", 4, 0, SHT_PROGBITS, 0 },
|
|
{ ".hash", 5, 0, SHT_HASH, 0 },
|
|
/* These sections do not need to be writable as the SymbianOS
|
|
postlinker will arrange things so that no dynamic relocation is
|
|
required. */
|
|
{ ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
|
|
{ ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
|
|
{ ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
|
|
{ NULL, 0, 0, 0, 0 }
|
|
};
|
|
|
|
static void
|
|
elf32_arm_symbian_begin_write_processing (bfd *abfd,
|
|
struct bfd_link_info *link_info
|
|
ATTRIBUTE_UNUSED)
|
|
{
|
|
/* BPABI objects are never loaded directly by an OS kernel; they are
|
|
processed by a postlinker first, into an OS-specific format. If
|
|
the D_PAGED bit is set on the file, BFD will align segments on
|
|
page boundaries, so that an OS can directly map the file. With
|
|
BPABI objects, that just results in wasted space. In addition,
|
|
because we clear the D_PAGED bit, map_sections_to_segments will
|
|
recognize that the program headers should not be mapped into any
|
|
loadable segment. */
|
|
abfd->flags &= ~D_PAGED;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_arm_symbian_modify_segment_map (bfd *abfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_segment_map *m;
|
|
asection *dynsec;
|
|
|
|
/* BPABI shared libraries and executables should have a PT_DYNAMIC
|
|
segment. However, because the .dynamic section is not marked
|
|
with SEC_LOAD, the generic ELF code will not create such a
|
|
segment. */
|
|
dynsec = bfd_get_section_by_name (abfd, ".dynamic");
|
|
if (dynsec)
|
|
{
|
|
m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
|
|
m->next = elf_tdata (abfd)->segment_map;
|
|
elf_tdata (abfd)->segment_map = m;
|
|
}
|
|
|
|
/* Also call the generic arm routine. */
|
|
return elf32_arm_modify_segment_map (abfd, info);
|
|
}
|
|
|
|
#undef elf32_bed
|
|
#define elf32_bed elf32_arm_symbian_bed
|
|
|
|
/* The dynamic sections are not allocated on SymbianOS; the postlinker
|
|
will process them and then discard them. */
|
|
#undef ELF_DYNAMIC_SEC_FLAGS
|
|
#define ELF_DYNAMIC_SEC_FLAGS \
|
|
(SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
|
|
|
|
#undef bfd_elf32_bfd_link_hash_table_create
|
|
#define bfd_elf32_bfd_link_hash_table_create \
|
|
elf32_arm_symbian_link_hash_table_create
|
|
|
|
#undef elf_backend_special_sections
|
|
#define elf_backend_special_sections elf32_arm_symbian_special_sections
|
|
|
|
#undef elf_backend_begin_write_processing
|
|
#define elf_backend_begin_write_processing \
|
|
elf32_arm_symbian_begin_write_processing
|
|
|
|
#undef elf_backend_modify_segment_map
|
|
#define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
|
|
|
|
/* There is no .got section for BPABI objects, and hence no header. */
|
|
#undef elf_backend_got_header_size
|
|
#define elf_backend_got_header_size 0
|
|
|
|
/* Similarly, there is no .got.plt section. */
|
|
#undef elf_backend_want_got_plt
|
|
#define elf_backend_want_got_plt 0
|
|
|
|
#undef elf_backend_may_use_rel_p
|
|
#define elf_backend_may_use_rel_p 1
|
|
#undef elf_backend_may_use_rela_p
|
|
#define elf_backend_may_use_rela_p 0
|
|
#undef elf_backend_default_use_rela_p
|
|
#define elf_backend_default_use_rela_p 0
|
|
#undef elf_backend_rela_normal
|
|
#define elf_backend_rela_normal 0
|
|
|
|
#include "elf32-target.h"
|