1434 lines
54 KiB
C
1434 lines
54 KiB
C
/* BFD back-end for National Semiconductor's CR16 ELF
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Copyright 2007 Free Software Foundation, Inc.
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Written by M R Swami Reddy.
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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 Foundation,
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Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "libiberty.h"
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#include "elf-bfd.h"
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#include "elf/cr16.h"
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/* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
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struct cr16_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
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unsigned short cr16_reloc_type; /* CR16 relocation type. */
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};
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static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] =
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{
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{BFD_RELOC_NONE, R_CR16_NONE},
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{BFD_RELOC_CR16_NUM8, R_CR16_NUM8},
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{BFD_RELOC_CR16_NUM16, R_CR16_NUM16},
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{BFD_RELOC_CR16_NUM32, R_CR16_NUM32},
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{BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a},
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{BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4},
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{BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a},
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{BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14},
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{BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a},
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{BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16},
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{BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20},
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{BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a},
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{BFD_RELOC_CR16_ABS20, R_CR16_ABS20},
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{BFD_RELOC_CR16_ABS24, R_CR16_ABS24},
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{BFD_RELOC_CR16_IMM4, R_CR16_IMM4},
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{BFD_RELOC_CR16_IMM8, R_CR16_IMM8},
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{BFD_RELOC_CR16_IMM16, R_CR16_IMM16},
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{BFD_RELOC_CR16_IMM20, R_CR16_IMM20},
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{BFD_RELOC_CR16_IMM24, R_CR16_IMM24},
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{BFD_RELOC_CR16_IMM32, R_CR16_IMM32},
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{BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a},
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{BFD_RELOC_CR16_DISP4, R_CR16_DISP4},
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{BFD_RELOC_CR16_DISP8, R_CR16_DISP8},
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{BFD_RELOC_CR16_DISP16, R_CR16_DISP16},
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{BFD_RELOC_CR16_DISP24, R_CR16_DISP24},
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{BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}
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};
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static reloc_howto_type cr16_elf_howto_table[] =
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{
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HOWTO (R_CR16_NONE, /* type */
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0, /* rightshift */
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2, /* size */
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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_CR16_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_CR16_NUM8, /* type */
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0, /* rightshift */
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0, /* size */
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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_CR16_NUM8", /* name */
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FALSE, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_NUM16, /* type */
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0, /* rightshift */
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1, /* size */
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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_CR16_NUM16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_NUM32, /* type */
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0, /* rightshift */
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2, /* size */
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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_CR16_NUM32", /* 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_CR16_NUM32a, /* type */
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1, /* rightshift */
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2, /* size */
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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_CR16_NUM32a", /* 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_CR16_REGREL4, /* type */
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0, /* rightshift */
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0, /* size */
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4, /* 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_CR16_REGREL4", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL4a, /* type */
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0, /* rightshift */
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0, /* size */
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4, /* 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_CR16_REGREL4a", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL14, /* type */
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0, /* rightshift */
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1, /* size */
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14, /* 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_CR16_REGREL14", /* name */
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FALSE, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL14a, /* type */
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0, /* rightshift */
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1, /* size */
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14, /* 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_CR16_REGREL14a", /* name */
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FALSE, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL16, /* type */
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0, /* rightshift */
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1, /* size */
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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_CR16_REGREL16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL20, /* type */
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0, /* rightshift */
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2, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_REGREL20", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL20a, /* type */
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0, /* rightshift */
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2, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_REGREL20a", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_ABS20, /* type */
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0, /* rightshift */
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2, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_ABS20", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_ABS24, /* type */
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0, /* rightshift */
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2, /* size */
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24, /* 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_CR16_ABS24", /* name */
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FALSE, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM4, /* type */
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0, /* rightshift */
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0, /* size */
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4, /* 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_CR16_IMM4", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM8, /* type */
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0, /* rightshift */
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0, /* size */
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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_CR16_IMM8", /* name */
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FALSE, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM16, /* type */
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0, /* rightshift */
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1, /* size */
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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_CR16_IMM16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM20, /* type */
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0, /* rightshift */
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2, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_IMM20", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM24, /* type */
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0, /* rightshift */
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2, /* size */
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24, /* 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_CR16_IMM24", /* name */
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FALSE, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_IMM32, /* type */
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0, /* rightshift */
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2, /* size */
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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_CR16_IMM32", /* 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_CR16_IMM32a, /* type */
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1, /* rightshift */
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2, /* size */
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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_CR16_IMM32a", /* 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_CR16_DISP4, /* type */
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1, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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4, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_DISP4", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_DISP8, /* type */
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1, /* rightshift */
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0, /* 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_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_DISP8", /* name */
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FALSE, /* partial_inplace */
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0x1ff, /* src_mask */
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0x1ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_DISP16, /* type */
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0, /* rightshift REVIITS: To sync with WinIDEA*/
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_DISP16", /* name */
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FALSE, /* partial_inplace */
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0x1ffff, /* src_mask */
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0x1ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* REVISIT: DISP24 should be left-shift by 2 as per ISA doc
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but its not done, to sync with WinIDEA and CR16 4.1 tools */
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HOWTO (R_CR16_DISP24, /* type */
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0, /* 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_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_DISP24", /* name */
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FALSE, /* partial_inplace */
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0x1ffffff, /* src_mask */
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0x1ffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_DISP24a, /* type */
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0, /* 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_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_DISP24a", /* name */
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FALSE, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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FALSE) /* pcrel_offset */
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};
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/* Retrieve a howto ptr using a BFD reloc_code. */
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static reloc_howto_type *
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elf_cr16_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 = 0; i < R_CR16_MAX; i++)
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if (code == cr16_reloc_map[i].bfd_reloc_enum)
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return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
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_bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code);
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return NULL;
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}
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static reloc_howto_type *
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elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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{
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unsigned int i;
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for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
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if (cr16_elf_howto_table[i].name != NULL
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&& strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
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return cr16_elf_howto_table + i;
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|
return NULL;
|
|
}
|
|
|
|
/* Retrieve a howto ptr using an internal relocation entry. */
|
|
|
|
static void
|
|
elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
|
|
Elf_Internal_Rela *dst)
|
|
{
|
|
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
|
|
|
BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX);
|
|
cache_ptr->howto = &cr16_elf_howto_table[r_type];
|
|
}
|
|
|
|
/* Perform a relocation as part of a final link. */
|
|
|
|
static bfd_reloc_status_type
|
|
cr16_elf_final_link_relocate (reloc_howto_type *howto,
|
|
bfd *input_bfd,
|
|
bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
asection *input_section,
|
|
bfd_byte *contents,
|
|
bfd_vma offset,
|
|
bfd_vma Rvalue,
|
|
bfd_vma addend,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
asection *sec ATTRIBUTE_UNUSED,
|
|
int is_local ATTRIBUTE_UNUSED)
|
|
{
|
|
unsigned short r_type = howto->type;
|
|
bfd_byte *hit_data = contents + offset;
|
|
bfd_vma reloc_bits, check, Rvalue1;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_CR16_IMM4:
|
|
case R_CR16_IMM8:
|
|
case R_CR16_IMM16:
|
|
case R_CR16_IMM20:
|
|
case R_CR16_IMM32:
|
|
case R_CR16_IMM32a:
|
|
case R_CR16_REGREL4:
|
|
case R_CR16_REGREL4a:
|
|
case R_CR16_REGREL14:
|
|
case R_CR16_REGREL14a:
|
|
case R_CR16_REGREL16:
|
|
case R_CR16_REGREL20:
|
|
case R_CR16_ABS20:
|
|
case R_CR16_ABS24:
|
|
case R_CR16_DISP16:
|
|
case R_CR16_DISP24:
|
|
/* 'hit_data' is relative to the start of the instruction, not the
|
|
relocation offset. Advance it to account for the exact offset. */
|
|
hit_data += 2;
|
|
break;
|
|
|
|
case R_CR16_NONE:
|
|
return bfd_reloc_ok;
|
|
break;
|
|
|
|
case R_CR16_DISP4:
|
|
case R_CR16_DISP8:
|
|
case R_CR16_DISP24a:
|
|
/* We only care about the addend, where the difference between
|
|
expressions is kept. */
|
|
if (is_local) Rvalue -= -1;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (howto->pc_relative)
|
|
{
|
|
/* Subtract the address of the section containing the location. */
|
|
Rvalue -= (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
/* Subtract the position of the location within the section. */
|
|
Rvalue -= offset;
|
|
}
|
|
|
|
/* Add in supplied addend. */
|
|
Rvalue += addend;
|
|
|
|
/* Complain if the bitfield overflows, whether it is considered
|
|
as signed or unsigned. */
|
|
check = Rvalue >> howto->rightshift;
|
|
|
|
/* Assumes two's complement. This expression avoids
|
|
overflow if howto->bitsize is the number of bits in
|
|
bfd_vma. */
|
|
reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
|
|
|
if (((bfd_vma) check & ~reloc_bits) != 0
|
|
&& (((bfd_vma) check & ~reloc_bits)
|
|
!= (-(bfd_vma) 1 & ~reloc_bits)))
|
|
{
|
|
/* The above right shift is incorrect for a signed
|
|
value. See if turning on the upper bits fixes the
|
|
overflow. */
|
|
if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
|
|
{
|
|
check |= ((bfd_vma) - 1
|
|
& ~((bfd_vma) - 1
|
|
>> howto->rightshift));
|
|
|
|
if (((bfd_vma) check & ~reloc_bits)
|
|
!= (-(bfd_vma) 1 & ~reloc_bits))
|
|
return bfd_reloc_overflow;
|
|
}
|
|
else
|
|
return bfd_reloc_overflow;
|
|
}
|
|
|
|
/* Drop unwanted bits from the value we are relocating to. */
|
|
Rvalue >>= (bfd_vma) howto->rightshift;
|
|
|
|
/* Apply dst_mask to select only relocatable part of the insn. */
|
|
Rvalue &= howto->dst_mask;
|
|
|
|
switch (howto->size)
|
|
{
|
|
case 0:
|
|
if ((r_type == R_CR16_IMM4)
|
|
|| (r_type == R_CR16_DISP4)
|
|
|| (r_type == R_CR16_DISP8))
|
|
{
|
|
Rvalue1 = bfd_get_16 (input_bfd, hit_data);
|
|
Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
|
|
| (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
if (r_type == R_CR16_DISP16)
|
|
{
|
|
Rvalue |= (bfd_get_16 (input_bfd, hit_data));
|
|
Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
|
|
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
if (r_type == R_CR16_ABS20)
|
|
{
|
|
Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16)
|
|
| (bfd_get_16 (input_bfd, hit_data + 2)))
|
|
& ~howto->dst_mask);
|
|
Rvalue |= (bfd_get_16 (input_bfd, hit_data + 2) << 16);
|
|
|
|
/* Relocation on INSTRUCTIONS is different : Instructions are
|
|
word-addressable, that is, each word itself is arranged according
|
|
to little-endian convention, whereas the words are arranged with
|
|
respect to one another in BIG ENDIAN fashion.
|
|
When there is an immediate value that spans a word boundary,
|
|
it is split in a big-endian way with respect to the words. */
|
|
bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data);
|
|
bfd_put_16 (input_bfd, (Rvalue >> 16)& 0xffff, hit_data + 2);
|
|
}
|
|
else if (r_type == R_CR16_ABS24)
|
|
{
|
|
Rvalue = ((((Rvalue >> 20)& 0xf)
|
|
| (((Rvalue >> 16) & 0xf) << 8)
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
|
| ((Rvalue & 0xffff) << 16));
|
|
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
else if (r_type == R_CR16_DISP24)
|
|
{
|
|
Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >> 16) & 0xf)<<8)
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
|
| (((Rvalue & 0xfffE) | ((Rvalue >> 24) & 0x1)) << 16));
|
|
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
|
|
{
|
|
Rvalue = (((Rvalue >> 16)& 0xffff)
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
|
| ((Rvalue & 0xffff) << 16);
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
else if (r_type == R_CR16_DISP24a)
|
|
{
|
|
Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
|
|
Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
|
|
| (bfd_get_32 (input_bfd, hit_data));
|
|
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
else if ((r_type == R_CR16_NUM32) || (r_type == R_CR16_NUM32a))
|
|
{
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return bfd_reloc_notsupported;
|
|
}
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* Delete some bytes from a section while relaxing. */
|
|
|
|
static bfd_boolean
|
|
elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
|
|
asection *sec, bfd_vma addr, int count)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
unsigned int sec_shndx;
|
|
bfd_byte *contents;
|
|
Elf_Internal_Rela *irel, *irelend;
|
|
Elf_Internal_Rela *irelalign;
|
|
bfd_vma toaddr;
|
|
Elf_Internal_Sym *isym;
|
|
Elf_Internal_Sym *isymend;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_link_hash_entry **end_hashes;
|
|
struct elf_link_hash_entry **start_hashes;
|
|
unsigned int symcount;
|
|
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
|
power larger than the number of bytes we are deleting. */
|
|
irelalign = NULL;
|
|
toaddr = sec->size;
|
|
|
|
irel = elf_section_data (sec)->relocs;
|
|
irelend = irel + sec->reloc_count;
|
|
|
|
/* Actually delete the bytes. */
|
|
memmove (contents + addr, contents + addr + count,
|
|
(size_t) (toaddr - addr - count));
|
|
sec->size -= count;
|
|
|
|
/* Adjust all the relocs. */
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
|
/* Get the new reloc address. */
|
|
if ((irel->r_offset > addr && irel->r_offset < toaddr))
|
|
irel->r_offset -= count;
|
|
|
|
/* Adjust the local symbols defined in this section. */
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
|
{
|
|
if (isym->st_shndx == sec_shndx
|
|
&& isym->st_value > addr
|
|
&& isym->st_value < toaddr)
|
|
{
|
|
/* Adjust the addend of SWITCH relocations in this section,
|
|
which reference this local symbol. */
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
|
{
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym *rsym;
|
|
bfd_vma addsym, subsym;
|
|
|
|
r_symndx = ELF32_R_SYM (irel->r_info);
|
|
rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
|
|
|
|
/* Skip if not the local adjusted symbol. */
|
|
if (rsym != isym)
|
|
continue;
|
|
|
|
addsym = isym->st_value;
|
|
subsym = addsym - irel->r_addend;
|
|
|
|
/* Fix the addend only when -->> (addsym > addr >= subsym). */
|
|
if (subsym <= addr)
|
|
irel->r_addend -= count;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
isym->st_value -= count;
|
|
}
|
|
}
|
|
|
|
/* Now adjust the global symbols defined in this section. */
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
|
- symtab_hdr->sh_info);
|
|
sym_hashes = start_hashes = elf_sym_hashes (abfd);
|
|
end_hashes = sym_hashes + symcount;
|
|
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
|
{
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
|
/* The '--wrap SYMBOL' option is causing a pain when the object file,
|
|
containing the definition of __wrap_SYMBOL, includes a direct
|
|
call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
|
|
the same symbol (which is __wrap_SYMBOL), but still exist as two
|
|
different symbols in 'sym_hashes', we don't want to adjust
|
|
the global symbol __wrap_SYMBOL twice.
|
|
This check is only relevant when symbols are being wrapped. */
|
|
if (link_info->wrap_hash != NULL)
|
|
{
|
|
struct elf_link_hash_entry **cur_sym_hashes;
|
|
|
|
/* Loop only over the symbols whom been already checked. */
|
|
for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
|
|
cur_sym_hashes++)
|
|
/* If the current symbol is identical to 'sym_hash', that means
|
|
the symbol was already adjusted (or at least checked). */
|
|
if (*cur_sym_hashes == sym_hash)
|
|
break;
|
|
|
|
/* Don't adjust the symbol again. */
|
|
if (cur_sym_hashes < sym_hashes)
|
|
continue;
|
|
}
|
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|
&& sym_hash->root.u.def.section == sec
|
|
&& sym_hash->root.u.def.value > addr
|
|
&& sym_hash->root.u.def.value < toaddr)
|
|
sym_hash->root.u.def.value -= count;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Relocate a CR16 ELF section. */
|
|
|
|
static bfd_boolean
|
|
elf32_cr16_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, *relend;
|
|
|
|
if (info->relocatable)
|
|
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;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
howto = cr16_elf_howto_table + (r_type);
|
|
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections[r_symndx];
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean unresolved_reloc, warned;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
}
|
|
|
|
r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
|
input_section,
|
|
contents, rel->r_offset,
|
|
relocation, rel->r_addend,
|
|
info, sec, h == NULL);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char *name;
|
|
const char *msg = NULL;
|
|
|
|
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);
|
|
}
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
if (!((*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;
|
|
}
|
|
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
|
which uses elf32_cr16_relocate_section. */
|
|
|
|
static bfd_byte *
|
|
elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
|
|
struct bfd_link_info *link_info,
|
|
struct bfd_link_order *link_order,
|
|
bfd_byte *data,
|
|
bfd_boolean relocatable,
|
|
asymbol **symbols)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
asection *input_section = link_order->u.indirect.section;
|
|
bfd *input_bfd = input_section->owner;
|
|
asection **sections = NULL;
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
|
|
|
/* We only need to handle the case of relaxing, or of having a
|
|
particular set of section contents, specially. */
|
|
if (relocatable
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
|
link_order, data,
|
|
relocatable,
|
|
symbols);
|
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
|
(size_t) input_section->size);
|
|
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
|
&& input_section->reloc_count > 0)
|
|
{
|
|
Elf_Internal_Sym *isym;
|
|
Elf_Internal_Sym *isymend;
|
|
asection **secpp;
|
|
bfd_size_type amt;
|
|
|
|
internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
|
|
NULL, NULL, FALSE);
|
|
if (internal_relocs == NULL)
|
|
goto error_return;
|
|
|
|
if (symtab_hdr->sh_info != 0)
|
|
{
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (isymbuf == NULL)
|
|
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (isymbuf == NULL)
|
|
goto error_return;
|
|
}
|
|
|
|
amt = symtab_hdr->sh_info;
|
|
amt *= sizeof (asection *);
|
|
sections = bfd_malloc (amt);
|
|
if (sections == NULL && amt != 0)
|
|
goto error_return;
|
|
|
|
isymend = isymbuf + symtab_hdr->sh_info;
|
|
for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
|
|
{
|
|
asection *isec;
|
|
|
|
if (isym->st_shndx == SHN_UNDEF)
|
|
isec = bfd_und_section_ptr;
|
|
else if (isym->st_shndx == SHN_ABS)
|
|
isec = bfd_abs_section_ptr;
|
|
else if (isym->st_shndx == SHN_COMMON)
|
|
isec = bfd_com_section_ptr;
|
|
else
|
|
isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
|
|
|
|
*secpp = isec;
|
|
}
|
|
|
|
if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
|
|
input_section, data, internal_relocs,
|
|
isymbuf, sections))
|
|
goto error_return;
|
|
|
|
if (sections != NULL)
|
|
free (sections);
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
free (isymbuf);
|
|
if (elf_section_data (input_section)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
}
|
|
|
|
return data;
|
|
|
|
error_return:
|
|
if (sections != NULL)
|
|
free (sections);
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
free (isymbuf);
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (input_section)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
return NULL;
|
|
}
|
|
|
|
/* This function handles relaxing for the CR16.
|
|
|
|
There's quite a few relaxing opportunites available on the CR16:
|
|
|
|
* bcond:24 -> bcond:16 2 bytes
|
|
* bcond:16 -> bcond:8 2 bytes
|
|
* arithmetic imm32 -> arithmetic imm16 2 bytes
|
|
|
|
Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
|
|
|
|
static bfd_boolean
|
|
elf32_cr16_relax_section (bfd *abfd, asection *sec,
|
|
struct bfd_link_info *link_info, bfd_boolean *again)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
Elf_Internal_Rela *internal_relocs;
|
|
Elf_Internal_Rela *irel, *irelend;
|
|
bfd_byte *contents = NULL;
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
|
|
|
/* Assume nothing changes. */
|
|
*again = FALSE;
|
|
|
|
/* We don't have to do anything for a relocatable link, if
|
|
this section does not have relocs, or if this is not a
|
|
code section. */
|
|
if (link_info->relocatable
|
|
|| (sec->flags & SEC_RELOC) == 0
|
|
|| sec->reloc_count == 0
|
|
|| (sec->flags & SEC_CODE) == 0)
|
|
return TRUE;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
|
|
/* Get a copy of the native relocations. */
|
|
internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
|
|
link_info->keep_memory);
|
|
if (internal_relocs == NULL)
|
|
goto error_return;
|
|
|
|
/* Walk through them looking for relaxing opportunities. */
|
|
irelend = internal_relocs + sec->reloc_count;
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
|
{
|
|
bfd_vma symval;
|
|
|
|
/* If this isn't something that can be relaxed, then ignore
|
|
this reloc. */
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24)
|
|
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;
|
|
/* Go get them off disk. */
|
|
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
|
goto error_return;
|
|
}
|
|
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
|
{
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (isymbuf == NULL)
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (isymbuf == NULL)
|
|
goto error_return;
|
|
}
|
|
|
|
/* Get the value of the symbol referred to by the reloc. */
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
|
{
|
|
/* A local symbol. */
|
|
Elf_Internal_Sym *isym;
|
|
asection *sym_sec;
|
|
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
|
if (isym->st_shndx == SHN_UNDEF)
|
|
sym_sec = bfd_und_section_ptr;
|
|
else if (isym->st_shndx == SHN_ABS)
|
|
sym_sec = bfd_abs_section_ptr;
|
|
else if (isym->st_shndx == SHN_COMMON)
|
|
sym_sec = bfd_com_section_ptr;
|
|
else
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
symval = (isym->st_value
|
|
+ sym_sec->output_section->vma
|
|
+ sym_sec->output_offset);
|
|
}
|
|
else
|
|
{
|
|
unsigned long indx;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
/* An external symbol. */
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
|
h = elf_sym_hashes (abfd)[indx];
|
|
BFD_ASSERT (h != NULL);
|
|
|
|
if (h->root.type != bfd_link_hash_defined
|
|
&& h->root.type != bfd_link_hash_defweak)
|
|
/* This appears to be a reference to an undefined
|
|
symbol. Just ignore it--it will be caught by the
|
|
regular reloc processing. */
|
|
continue;
|
|
|
|
symval = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
|
|
/* For simplicity of coding, we are going to modify the section
|
|
contents, the section relocs, and the BFD symbol table. We
|
|
must tell the rest of the code not to free up this
|
|
information. It would be possible to instead create a table
|
|
of changes which have to be made, as is done in coff-mips.c;
|
|
that would be more work, but would require less memory when
|
|
the linker is run. */
|
|
|
|
/* Try to turn a 24 branch/call into a 16bit relative
|
|
* branch/call. */
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
/* Deal with pc-relative gunk. */
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
|
value -= irel->r_offset;
|
|
value += irel->r_addend;
|
|
|
|
/* See if the value will fit in 16 bits, note the high value is
|
|
0xfffe + 2 as the target will be two bytes closer if we are
|
|
able to relax. */
|
|
if ((long) value < 0x10000 && (long) value > -0x10002)
|
|
{
|
|
unsigned int code;
|
|
|
|
/* Get the opcode. */
|
|
code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
|
|
|
|
/* Verify it's a 'bcond' and fix the opcode. */
|
|
if ((code & 0xffff) == 0x0010)
|
|
{
|
|
bfd_put_16 (abfd, 0x1800 | ((0xf & (code >>20))<<4), contents + irel->r_offset);
|
|
bfd_put_16 (abfd, value, contents + irel->r_offset+2);
|
|
}
|
|
else
|
|
continue;
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the relocation's type. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_CR16_DISP16);
|
|
|
|
/* Delete two bytes of data. */
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
|
irel->r_offset + 2, 2))
|
|
goto error_return;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Try to turn a 16bit pc-relative branch into an
|
|
8bit pc-relative branch. */
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
/* Deal with pc-relative gunk. */
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
|
value -= irel->r_offset;
|
|
value += irel->r_addend;
|
|
|
|
/* See if the value will fit in 8 bits, note the high value is
|
|
0xfc + 2 as the target will be two bytes closer if we are
|
|
able to relax. */
|
|
if ((long) value < 0xfe && (long) value > -0x100)
|
|
{
|
|
unsigned short code;
|
|
|
|
/* Get the opcode. */
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
|
|
|
/* Verify it's a 'bcond' opcode. */
|
|
if ((code & 0xff00) == 0x1800)
|
|
{
|
|
bfd_put_8 (abfd, 0x1 | ((0xf & (code>>4))<<4), contents + irel->r_offset);
|
|
bfd_put_8 (abfd, value, contents + irel->r_offset+2);
|
|
}
|
|
else
|
|
continue;
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the relocation's type. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_CR16_DISP8);
|
|
|
|
/* Delete two bytes of data. */
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
|
irel->r_offset + 2, 2))
|
|
goto error_return;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
|
|
#if 0 // REVISIT: To support IMM relaxation in CR16 target
|
|
/* Try to turn a 32bit immediate address into
|
|
a 20bit immediate address. */
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
/* See if the value will fit in 20 bits. */
|
|
if ((long) value < 0x7ffff && (long) value > -0x80000)
|
|
{
|
|
unsigned short code;
|
|
|
|
/* Get the opcode. */
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
|
|
|
/* Verify it's a 'arithmetic double'. */
|
|
if ((code & 0xfff0) != 0x0070)
|
|
continue;
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the opcode. */
|
|
bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset);
|
|
|
|
/* Fix the relocation's type. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_CR16_IMM20);
|
|
|
|
/* Delete two bytes of data. */
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
|
irel->r_offset + 2, 2))
|
|
goto error_return;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
/* Try to turn a 20bit/16bit immediate address into
|
|
a 4bit immediate address. */
|
|
if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
|
|
|| (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
/* See if the value will fit in 4 bits. */
|
|
if ((long) value < 0x7 && (long) value > -0x8)
|
|
{
|
|
unsigned short code;
|
|
|
|
/* Get the opcode. */
|
|
code = (unsigned short) bfd_get_8 (abfd, contents + irel->r_offset);
|
|
|
|
/* Verify it's a 'arithmetic double'. */
|
|
if (((code & 0xff) != 0x50) || ((code & 0xff) != 0x45))
|
|
continue;
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the opcode. */
|
|
bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset);
|
|
|
|
/* Fix the relocation's type. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_CR16_IMM4);
|
|
|
|
/* Delete two bytes of data. */
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
|
irel->r_offset + 2, 2))
|
|
goto error_return;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
{
|
|
if (! link_info->keep_memory)
|
|
free (isymbuf);
|
|
else
|
|
{
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
}
|
|
}
|
|
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
{
|
|
if (! link_info->keep_memory)
|
|
free (contents);
|
|
else
|
|
{
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
}
|
|
}
|
|
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
|
|
return TRUE;
|
|
|
|
error_return:
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
free (isymbuf);
|
|
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;
|
|
}
|
|
|
|
static asection *
|
|
elf32_cr16_gc_mark_hook (asection *sec,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
Elf_Internal_Rela *rel ATTRIBUTE_UNUSED,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
if (h == NULL)
|
|
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
|
|
|
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:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
|
|
|
static bfd_boolean
|
|
elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
asection *sec ATTRIBUTE_UNUSED,
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
|
|
{
|
|
/* We don't support garbage collection of GOT and PLT relocs yet. */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Definitions for setting CR16 target vector. */
|
|
#define TARGET_LITTLE_SYM bfd_elf32_cr16_vec
|
|
#define TARGET_LITTLE_NAME "elf32-cr16"
|
|
#define ELF_ARCH bfd_arch_cr16
|
|
#define ELF_MACHINE_CODE EM_CR16
|
|
#define ELF_MAXPAGESIZE 0x1
|
|
#define elf_symbol_leading_char '_'
|
|
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
|
|
#define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
|
|
#define elf_info_to_howto elf_cr16_info_to_howto
|
|
#define elf_info_to_howto_rel 0
|
|
#define elf_backend_relocate_section elf32_cr16_relocate_section
|
|
#define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
|
elf32_cr16_get_relocated_section_contents
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#define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
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#define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook
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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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#include "elf32-target.h"
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