377 lines
11 KiB
C
377 lines
11 KiB
C
/* ft32-specific support for 32-bit ELF.
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Copyright (C) 2013-2016 Free Software Foundation, Inc.
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Copied from elf32-moxie.c which is..
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Copyright (C) 2009-2016 Free Software Foundation, Inc.
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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 3 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,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/ft32.h"
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/* Forward declarations. */
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static reloc_howto_type ft32_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_FT32_NONE, /* 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_FT32_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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/* A 32 bit absolute relocation. */
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HOWTO (R_FT32_32, /* 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_FT32_32", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_16, /* 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_FT32_16", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_8, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FT32_8", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x000000ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_10, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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FALSE, /* pc_relative */
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4, /* 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_FT32_10", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x00003ff0, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_20, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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20, /* 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_FT32_20", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x000fffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_17, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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17, /* 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_FT32_17", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0001ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_FT32_18, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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18, /* 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_FT32_18", /* name */
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FALSE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0003ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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};
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/* Map BFD reloc types to FT32 ELF reloc types. */
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struct ft32_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int ft32_reloc_val;
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};
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static const struct ft32_reloc_map ft32_reloc_map [] =
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{
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{ BFD_RELOC_NONE, R_FT32_NONE },
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{ BFD_RELOC_32, R_FT32_32 },
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{ BFD_RELOC_16, R_FT32_16 },
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{ BFD_RELOC_8, R_FT32_8 },
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{ BFD_RELOC_FT32_10, R_FT32_10 },
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{ BFD_RELOC_FT32_20, R_FT32_20 },
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{ BFD_RELOC_FT32_17, R_FT32_17 },
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{ BFD_RELOC_FT32_18, R_FT32_18 },
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};
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static reloc_howto_type *
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ft32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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unsigned int i;
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for (i = sizeof (ft32_reloc_map) / sizeof (ft32_reloc_map[0]);
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--i;)
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if (ft32_reloc_map [i].bfd_reloc_val == code)
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return & ft32_elf_howto_table [ft32_reloc_map[i].ft32_reloc_val];
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return NULL;
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}
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static reloc_howto_type *
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ft32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (ft32_elf_howto_table) / sizeof (ft32_elf_howto_table[0]);
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i++)
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if (ft32_elf_howto_table[i].name != NULL
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&& strcasecmp (ft32_elf_howto_table[i].name, r_name) == 0)
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return &ft32_elf_howto_table[i];
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return NULL;
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}
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/* Set the howto pointer for an FT32 ELF reloc. */
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static void
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ft32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *cache_ptr,
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Elf_Internal_Rela *dst)
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_FT32_max);
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cache_ptr->howto = & ft32_elf_howto_table [r_type];
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}
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/* Relocate an FT32 ELF section.
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The RELOCATE_SECTION function is called by the new ELF backend linker
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to handle the relocations for a section.
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The relocs are always passed as Rela structures; if the section
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actually uses Rel structures, the r_addend field will always be
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zero.
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This function is responsible for adjusting the section contents as
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necessary, and (if using Rela relocs and generating a relocatable
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output file) adjusting the reloc addend as necessary.
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This function does not have to worry about setting the reloc
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address or the reloc symbol index.
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LOCAL_SYMS is a pointer to the swapped in local symbols.
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LOCAL_SECTIONS is an array giving the section in the input file
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corresponding to the st_shndx field of each local symbol.
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The global hash table entry for the global symbols can be found
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via elf_sym_hashes (input_bfd).
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When generating relocatable output, this function must handle
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STB_LOCAL/STT_SECTION symbols specially. The output symbol is
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going to be the section symbol corresponding to the output
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section, which means that the addend must be adjusted
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accordingly. */
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static bfd_boolean
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ft32_elf_relocate_section (bfd *output_bfd,
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struct bfd_link_info *info,
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bfd *input_bfd,
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asection *input_section,
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bfd_byte *contents,
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Elf_Internal_Rela *relocs,
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Elf_Internal_Sym *local_syms,
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asection **local_sections)
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{
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Elf_Internal_Shdr *symtab_hdr;
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struct elf_link_hash_entry **sym_hashes;
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Elf_Internal_Rela *rel;
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Elf_Internal_Rela *relend;
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symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (input_bfd);
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relend = relocs + input_section->reloc_count;
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for (rel = relocs; rel < relend; rel ++)
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{
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reloc_howto_type *howto;
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unsigned long r_symndx;
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Elf_Internal_Sym *sym;
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asection *sec;
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struct elf_link_hash_entry *h;
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bfd_vma relocation;
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bfd_reloc_status_type r;
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const char *name;
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int r_type;
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r_type = ELF32_R_TYPE (rel->r_info);
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r_symndx = ELF32_R_SYM (rel->r_info);
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howto = ft32_elf_howto_table + r_type;
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h = NULL;
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sym = NULL;
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sec = NULL;
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if (r_symndx < symtab_hdr->sh_info)
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{
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sym = local_syms + r_symndx;
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sec = local_sections [r_symndx];
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relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
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name = bfd_elf_string_from_elf_section
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(input_bfd, symtab_hdr->sh_link, sym->st_name);
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name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
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}
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else
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{
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bfd_boolean unresolved_reloc, warned, ignored;
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RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
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r_symndx, symtab_hdr, sym_hashes,
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h, sec, relocation,
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unresolved_reloc, warned, ignored);
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name = h->root.root.string;
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}
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if (sec != NULL && discarded_section (sec))
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RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
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rel, 1, relend, howto, 0, contents);
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if (bfd_link_relocatable (info))
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continue;
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r = _bfd_final_link_relocate (howto, input_bfd, input_section,
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contents, rel->r_offset,
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relocation, rel->r_addend);
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if (r != bfd_reloc_ok)
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{
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const char * msg = NULL;
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switch (r)
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{
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case bfd_reloc_overflow:
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(*info->callbacks->reloc_overflow)
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(info, (h ? &h->root : NULL), name, howto->name,
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(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
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break;
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case bfd_reloc_undefined:
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(*info->callbacks->undefined_symbol)
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(info, name, input_bfd, input_section, rel->r_offset, TRUE);
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break;
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case bfd_reloc_outofrange:
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msg = _("internal error: out of range error");
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break;
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case bfd_reloc_notsupported:
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msg = _("internal error: unsupported relocation error");
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break;
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case bfd_reloc_dangerous:
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msg = _("internal error: dangerous relocation");
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break;
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default:
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msg = _("internal error: unknown error");
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break;
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}
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if (msg)
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(*info->callbacks->warning) (info, msg, name, input_bfd,
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input_section, rel->r_offset);
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}
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}
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return TRUE;
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}
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#define ELF_ARCH bfd_arch_ft32
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#define ELF_MACHINE_CODE EM_FT32
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#define ELF_MAXPAGESIZE 0x1
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#define TARGET_LITTLE_SYM ft32_elf32_vec
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#define TARGET_LITTLE_NAME "elf32-ft32"
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#define elf_info_to_howto_rel NULL
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#define elf_info_to_howto ft32_info_to_howto_rela
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#define elf_backend_relocate_section ft32_elf_relocate_section
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#define elf_backend_can_gc_sections 1
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#define elf_backend_rela_normal 1
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#define bfd_elf32_bfd_reloc_type_lookup ft32_reloc_type_lookup
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#define bfd_elf32_bfd_reloc_name_lookup ft32_reloc_name_lookup
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#include "elf32-target.h"
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