| /* BFD back-end for National Semiconductor's CR16 ELF |
| Copyright 2007 Free Software Foundation, Inc. |
| Written by M R Swami Reddy. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "libiberty.h" |
| #include "elf-bfd.h" |
| #include "elf/cr16.h" |
| |
| /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ |
| |
| struct cr16_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ |
| unsigned short cr16_reloc_type; /* CR16 relocation type. */ |
| }; |
| |
| static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] = |
| { |
| {BFD_RELOC_NONE, R_CR16_NONE}, |
| {BFD_RELOC_CR16_NUM8, R_CR16_NUM8}, |
| {BFD_RELOC_CR16_NUM16, R_CR16_NUM16}, |
| {BFD_RELOC_CR16_NUM32, R_CR16_NUM32}, |
| {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a}, |
| {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4}, |
| {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a}, |
| {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14}, |
| {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a}, |
| {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16}, |
| {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20}, |
| {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a}, |
| {BFD_RELOC_CR16_ABS20, R_CR16_ABS20}, |
| {BFD_RELOC_CR16_ABS24, R_CR16_ABS24}, |
| {BFD_RELOC_CR16_IMM4, R_CR16_IMM4}, |
| {BFD_RELOC_CR16_IMM8, R_CR16_IMM8}, |
| {BFD_RELOC_CR16_IMM16, R_CR16_IMM16}, |
| {BFD_RELOC_CR16_IMM20, R_CR16_IMM20}, |
| {BFD_RELOC_CR16_IMM24, R_CR16_IMM24}, |
| {BFD_RELOC_CR16_IMM32, R_CR16_IMM32}, |
| {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a}, |
| {BFD_RELOC_CR16_DISP4, R_CR16_DISP4}, |
| {BFD_RELOC_CR16_DISP8, R_CR16_DISP8}, |
| {BFD_RELOC_CR16_DISP16, R_CR16_DISP16}, |
| {BFD_RELOC_CR16_DISP24, R_CR16_DISP24}, |
| {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}, |
| {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8}, |
| {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16}, |
| {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32} |
| }; |
| |
| static reloc_howto_type cr16_elf_howto_table[] = |
| { |
| HOWTO (R_CR16_NONE, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_NUM8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 8, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_NUM8", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_NUM16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_NUM16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_NUM32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_NUM32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_NUM32a, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_NUM32a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL4, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 4, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL4", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xf, /* src_mask */ |
| 0xf, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL4a, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 4, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL4a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xf, /* src_mask */ |
| 0xf, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL14, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 14, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL14", /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3fff, /* src_mask */ |
| 0x3fff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL14a, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 14, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL14a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3fff, /* src_mask */ |
| 0x3fff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL20, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 20, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL20", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfffff, /* src_mask */ |
| 0xfffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_REGREL20a, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 20, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_REGREL20a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfffff, /* src_mask */ |
| 0xfffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_ABS20, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 20, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_ABS20", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfffff, /* src_mask */ |
| 0xfffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_ABS24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 24, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_ABS24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM4, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 4, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM4", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xf, /* src_mask */ |
| 0xf, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 8, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM8", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM20, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 20, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM20", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfffff, /* src_mask */ |
| 0xfffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 24, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_IMM32a, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_IMM32a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_DISP4, /* type */ |
| 1, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 4, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_DISP4", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xf, /* src_mask */ |
| 0xf, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_DISP8, /* type */ |
| 1, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_DISP8", /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1ff, /* src_mask */ |
| 0x1ff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_DISP16, /* type */ |
| 0, /* rightshift REVIITS: To sync with WinIDEA*/ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_DISP16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1ffff, /* src_mask */ |
| 0x1ffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc |
| but its not done, to sync with WinIDEA and CR16 4.1 tools */ |
| HOWTO (R_CR16_DISP24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 24, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_DISP24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1ffffff, /* src_mask */ |
| 0x1ffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (R_CR16_DISP24a, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 24, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_DISP24a", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An 8 bit switch table entry. This is generated for an expression |
| such as ``.byte L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CR16_SWITCH8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_SWITCH8", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A 16 bit switch table entry. This is generated for an expression |
| such as ``.word L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CR16_SWITCH16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_SWITCH16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A 32 bit switch table entry. This is generated for an expression |
| such as ``.long L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CR16_SWITCH32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CR16_SWITCH32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE) /* pcrel_offset */ |
| }; |
| |
| /* Retrieve a howto ptr using a BFD reloc_code. */ |
| |
| static reloc_howto_type * |
| elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < R_CR16_MAX; i++) |
| if (code == cr16_reloc_map[i].bfd_reloc_enum) |
| return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type]; |
| |
| _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code); |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++) |
| if (cr16_elf_howto_table[i].name != NULL |
| && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0) |
| return cr16_elf_howto_table + i; |
| |
| 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_IMM20: |
| case R_CR16_ABS20: |
| break; |
| |
| case R_CR16_IMM8: |
| case R_CR16_IMM16: |
| 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_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: |
| if (is_local) |
| Rvalue += -1; |
| break; |
| |
| case R_CR16_DISP8: |
| case R_CR16_DISP24a: |
| if (is_local) |
| Rvalue -= -1; |
| break; |
| |
| case R_CR16_SWITCH8: |
| case R_CR16_SWITCH16: |
| case R_CR16_SWITCH32: |
| /* We only care about the addend, where the difference between |
| expressions is kept. */ |
| Rvalue = 0; |
| |
| 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_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); |
| } |
| else if (r_type == R_CR16_IMM4) |
| { |
| Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0) |
| | ((Rvalue1 & 0x0f00) >> 8)); |
| bfd_put_16 (input_bfd, Rvalue, hit_data); |
| } |
| else if (r_type == R_CR16_DISP4) |
| { |
| Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4)); |
| bfd_put_16 (input_bfd, Rvalue, hit_data); |
| } |
| else |
| { |
| bfd_put_8 (input_bfd, (unsigned char) 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) || (r_type == R_CR16_IMM20)) |
| { |
| bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
| | ((Rvalue >> 16) & 0xf), hit_data); |
| bfd_put_16 (input_bfd, (Rvalue) & 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)); |
| } |
| 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)); |
| } |
| 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); |
| } |
| 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); |
| } |
| 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; |
| |
| /* Skip if not a SWITCH relocation. */ |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32) |
| continue; |
| |
| 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 imm20/imm16 2 bytes |
| * arithmetic imm20/imm16 -> arithmetic imm4 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 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16) |
| 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 16-bit pc-relative branch into an |
| 8-bit 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; |
| } |
| } |
| |
| /* Try to turn a 32bit immediate address into |
| a 20/16bit immediate address. */ |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32) |
| { |
| bfd_vma value = symval; |
| unsigned short is_add_mov = 0; |
| |
| /* See if the value will fit in 20 bits. */ |
| if ((long) value < 0xfffff && (long) value > 0) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* Verify it's a arithmetic ADDD or MOVD instruction. |
| For ADDD and MOVD only, convert to IMM32 -> IMM20. */ |
| if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020)) |
| is_add_mov = 1; |
| |
| if (is_add_mov) |
| { |
| /* 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. */ |
| if ((code & 0xfff0) == 0x0070) /* For movd. */ |
| bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1); |
| else /* code == 0x0020 for addd. */ |
| bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1); |
| |
| bfd_put_8 (abfd, (code & 0xf) << 4, 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; |
| } |
| } |
| /* See if the value will fit in 16 bits. */ |
| if ((!is_add_mov) && ((long) value < 0x7fff && (long) value > 0)) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* 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. */ |
| if ((code & 0xf0) == 0x70) /* For movd. */ |
| bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1); |
| else if ((code & 0xf0) == 0x20) /* For addd. */ |
| bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1); |
| else if ((code & 0xf0) == 0x90) /* For cmpd. */ |
| bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1); |
| else |
| continue; |
| |
| bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset); |
| |
| /* Fix the relocation's type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| R_CR16_IMM16); |
| |
| /* 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 20/16bit 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 < 0xf && (long) value > 0) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* 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. */ |
| if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500)) |
| { |
| if ((code & 0x0f00) == 0x0400) /* For movd imm20. */ |
| bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| else /* For addd imm20. */ |
| bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1); |
| } |
| else |
| { |
| if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */ |
| bfd_put_8 (abfd, 0x56, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */ |
| bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */ |
| bfd_put_8 (abfd, 0x58, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */ |
| bfd_put_8 (abfd, 0x5A, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */ |
| bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */ |
| bfd_put_8 (abfd, 0x30, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */ |
| bfd_put_8 (abfd, 0x2C, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */ |
| bfd_put_8 (abfd, 0x32, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */ |
| bfd_put_8 (abfd, 0x38, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */ |
| bfd_put_8 (abfd, 0x3A, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */ |
| bfd_put_8 (abfd, 0x50, contents + irel->r_offset); |
| else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */ |
| bfd_put_8 (abfd, 0x52, contents + irel->r_offset); |
| else |
| continue; |
| |
| bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1); |
| } |
| |
| /* 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; |
| } |
| } |
| } |
| |
| 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 |
| #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook |
| #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_rela_normal 1 |
| |
| #include "elf32-target.h" |