| /* Hitachi SH specific support for 32-bit ELF |
| Copyright 1996, 1997, 1998 Free Software Foundation, Inc. |
| Contributed by Ian Lance Taylor, Cygnus Support. |
| |
| 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/sh.h" |
| |
| static bfd_reloc_status_type sh_elf_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type sh_elf_ignore_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static reloc_howto_type *sh_elf_reloc_type_lookup |
| PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| static void sh_elf_info_to_howto |
| PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| static boolean sh_elf_relax_section |
| PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); |
| static boolean sh_elf_relax_delete_bytes |
| PARAMS ((bfd *, asection *, bfd_vma, int)); |
| static boolean sh_elf_align_loads |
| PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, boolean *)); |
| static boolean sh_elf_swap_insns |
| PARAMS ((bfd *, asection *, PTR, bfd_byte *, bfd_vma)); |
| static boolean sh_elf_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| static bfd_byte *sh_elf_get_relocated_section_contents |
| PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| bfd_byte *, boolean, asymbol **)); |
| |
| static reloc_howto_type sh_elf_howto_table[] = |
| { |
| /* No relocation. */ |
| HOWTO (R_SH_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32 bit absolute relocation. Setting partial_inplace to true and |
| src_mask to a non-zero value is similar to the COFF toolchain. */ |
| HOWTO (R_SH_DIR32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32 bit PC relative relocation. */ |
| HOWTO (R_SH_REL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_REL32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit PC relative branch divided by 2. */ |
| HOWTO (R_SH_DIR8WPN, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8WPN", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 12 bit PC relative branch divided by 2. */ |
| HOWTO (R_SH_IND12W, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_IND12W", /* name */ |
| true, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit unsigned PC relative divided by 4. */ |
| HOWTO (R_SH_DIR8WPL, /* type */ |
| 2, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8WPL", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit unsigned PC relative divided by 2. */ |
| HOWTO (R_SH_DIR8WPZ, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8WPZ", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit GBR relative. FIXME: This only makes sense if we have some |
| special symbol for the GBR relative area, and that is not |
| implemented. */ |
| HOWTO (R_SH_DIR8BP, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8BP", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit GBR relative divided by 2. FIXME: This only makes sense if |
| we have some special symbol for the GBR relative area, and that |
| is not implemented. */ |
| HOWTO (R_SH_DIR8W, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8W", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 8 bit GBR relative divided by 4. FIXME: This only makes sense if |
| we have some special symbol for the GBR relative area, and that |
| is not implemented. */ |
| HOWTO (R_SH_DIR8L, /* type */ |
| 2, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_reloc, /* special_function */ |
| "R_SH_DIR8L", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| { 10 }, |
| { 11 }, |
| { 12 }, |
| { 13 }, |
| { 14 }, |
| { 15 }, |
| { 16 }, |
| { 17 }, |
| { 18 }, |
| { 19 }, |
| { 20 }, |
| { 21 }, |
| { 22 }, |
| { 23 }, |
| { 24 }, |
| |
| /* The remaining relocs are a GNU extension used for relaxing. The |
| final pass of the linker never needs to do anything with any of |
| these relocs. Any required operations are handled by the |
| relaxation code. */ |
| |
| /* 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_SH_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 */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_SWITCH16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* 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_SH_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 */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_SWITCH32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Indicates a .uses pseudo-op. The compiler will generate .uses |
| pseudo-ops when it finds a function call which can be relaxed. |
| The offset field holds the PC relative offset to the instruction |
| which loads the register used in the function call. */ |
| HOWTO (R_SH_USES, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_USES", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* The assembler will generate this reloc for addresses referred to |
| by the register loads associated with USES relocs. The offset |
| field holds the number of times the address is referenced in the |
| object file. */ |
| HOWTO (R_SH_COUNT, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_COUNT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Indicates an alignment statement. The offset field is the power |
| of 2 to which subsequent portions of the object file must be |
| aligned. */ |
| HOWTO (R_SH_ALIGN, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_ALIGN", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* The assembler will generate this reloc before a block of |
| instructions. A section should be processed as assumining it |
| contains data, unless this reloc is seen. */ |
| HOWTO (R_SH_CODE, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_CODE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* The assembler will generate this reloc after a block of |
| instructions when it sees data that is not instructions. */ |
| HOWTO (R_SH_DATA, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_DATA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* The assembler generates this reloc for each label within a block |
| of instructions. This permits the linker to avoid swapping |
| instructions which are the targets of branches. */ |
| HOWTO (R_SH_LABEL, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_LABEL", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* An 8 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_SH_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 */ |
| sh_elf_ignore_reloc, /* special_function */ |
| "R_SH_SWITCH8", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy */ |
| HOWTO (R_SH_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_SH_GNU_VTINHERIT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage */ |
| HOWTO (R_SH_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| "R_SH_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| }; |
| |
| /* This function is used for normal relocs. This is like the COFF |
| function, and is almost certainly incorrect for other ELF targets. */ |
| |
| static bfd_reloc_status_type |
| sh_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, |
| error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol_in; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| unsigned long insn; |
| bfd_vma sym_value; |
| enum elf_sh_reloc_type r_type; |
| bfd_vma addr = reloc_entry->address; |
| bfd_byte *hit_data = addr + (bfd_byte *) data; |
| |
| r_type = (enum elf_sh_reloc_type) reloc_entry->howto->type; |
| |
| if (output_bfd != NULL) |
| { |
| /* Partial linking--do nothing. */ |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| /* Almost all relocs have to do with relaxing. If any work must be |
| done for them, it has been done in sh_relax_section. */ |
| if (r_type != R_SH_DIR32 |
| && (r_type != R_SH_IND12W |
| || (symbol_in->flags & BSF_LOCAL) != 0)) |
| return bfd_reloc_ok; |
| |
| if (symbol_in != NULL |
| && bfd_is_und_section (symbol_in->section)) |
| return bfd_reloc_undefined; |
| |
| if (bfd_is_com_section (symbol_in->section)) |
| sym_value = 0; |
| else |
| sym_value = (symbol_in->value + |
| symbol_in->section->output_section->vma + |
| symbol_in->section->output_offset); |
| |
| switch (r_type) |
| { |
| case R_SH_DIR32: |
| insn = bfd_get_32 (abfd, hit_data); |
| insn += sym_value + reloc_entry->addend; |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| case R_SH_IND12W: |
| insn = bfd_get_16 (abfd, hit_data); |
| sym_value += reloc_entry->addend; |
| sym_value -= (input_section->output_section->vma |
| + input_section->output_offset |
| + addr |
| + 4); |
| sym_value += (insn & 0xfff) << 1; |
| if (insn & 0x800) |
| sym_value -= 0x1000; |
| insn = (insn & 0xf000) | (sym_value & 0xfff); |
| bfd_put_16 (abfd, insn, hit_data); |
| if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000) |
| return bfd_reloc_overflow; |
| break; |
| default: |
| abort (); |
| break; |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* This function is used for relocs which are only used for relaxing, |
| which the linker should otherwise ignore. */ |
| |
| static bfd_reloc_status_type |
| sh_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, |
| output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| if (output_bfd != NULL) |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| /* This structure is used to map BFD reloc codes to SH ELF relocs. */ |
| |
| struct elf_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| /* An array mapping BFD reloc codes to SH ELF relocs. */ |
| |
| static const struct elf_reloc_map sh_reloc_map[] = |
| { |
| { BFD_RELOC_NONE, R_SH_NONE }, |
| { BFD_RELOC_32, R_SH_DIR32 }, |
| { BFD_RELOC_CTOR, R_SH_DIR32 }, |
| { BFD_RELOC_32_PCREL, R_SH_REL32 }, |
| { BFD_RELOC_SH_PCDISP8BY2, R_SH_DIR8WPN }, |
| { BFD_RELOC_SH_PCDISP12BY2, R_SH_IND12W }, |
| { BFD_RELOC_SH_PCRELIMM8BY2, R_SH_DIR8WPZ }, |
| { BFD_RELOC_SH_PCRELIMM8BY4, R_SH_DIR8WPL }, |
| { BFD_RELOC_8_PCREL, R_SH_SWITCH8 }, |
| { BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 }, |
| { BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 }, |
| { BFD_RELOC_SH_USES, R_SH_USES }, |
| { BFD_RELOC_SH_COUNT, R_SH_COUNT }, |
| { BFD_RELOC_SH_ALIGN, R_SH_ALIGN }, |
| { BFD_RELOC_SH_CODE, R_SH_CODE }, |
| { BFD_RELOC_SH_DATA, R_SH_DATA }, |
| { BFD_RELOC_SH_LABEL, R_SH_LABEL }, |
| { BFD_RELOC_VTABLE_INHERIT, R_SH_GNU_VTINHERIT }, |
| { BFD_RELOC_VTABLE_ENTRY, R_SH_GNU_VTENTRY }, |
| }; |
| |
| /* Given a BFD reloc code, return the howto structure for the |
| corresponding SH ELf reloc. */ |
| |
| static reloc_howto_type * |
| sh_elf_reloc_type_lookup (abfd, code) |
| bfd *abfd; |
| bfd_reloc_code_real_type code; |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| { |
| if (sh_reloc_map[i].bfd_reloc_val == code) |
| return &sh_elf_howto_table[(int) sh_reloc_map[i].elf_reloc_val]; |
| } |
| |
| return NULL; |
| } |
| |
| /* Given an ELF reloc, fill in the howto field of a relent. */ |
| |
| static void |
| sh_elf_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd; |
| arelent *cache_ptr; |
| Elf_Internal_Rela *dst; |
| { |
| unsigned int r; |
| |
| r = ELF32_R_TYPE (dst->r_info); |
| |
| BFD_ASSERT (r < (unsigned int) R_SH_max); |
| BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC || r > R_SH_LAST_INVALID_RELOC); |
| |
| cache_ptr->howto = &sh_elf_howto_table[r]; |
| } |
| |
| /* This function handles relaxing for SH ELF. See the corresponding |
| function in coff-sh.c for a description of what this does. FIXME: |
| There is a lot of duplication here between this code and the COFF |
| specific code. The format of relocs and symbols is wound deeply |
| into this code, but it would still be better if the duplication |
| could be eliminated somehow. Note in particular that although both |
| functions use symbols like R_SH_CODE, those symbols have different |
| values; in coff-sh.c they come from include/coff/sh.h, whereas here |
| they come from enum elf_sh_reloc_type in include/elf/sh.h. */ |
| |
| static boolean |
| sh_elf_relax_section (abfd, sec, link_info, again) |
| bfd *abfd; |
| asection *sec; |
| struct bfd_link_info *link_info; |
| boolean *again; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Rela *internal_relocs; |
| Elf_Internal_Rela *free_relocs = NULL; |
| boolean have_code; |
| Elf_Internal_Rela *irel, *irelend; |
| bfd_byte *contents = NULL; |
| bfd_byte *free_contents = NULL; |
| Elf32_External_Sym *extsyms = NULL; |
| Elf32_External_Sym *free_extsyms = NULL; |
| |
| *again = false; |
| |
| if (link_info->relocateable |
| || (sec->flags & SEC_RELOC) == 0 |
| || sec->reloc_count == 0) |
| return true; |
| |
| /* If this is the first time we have been called for this section, |
| initialize the cooked size. */ |
| if (sec->_cooked_size == 0) |
| sec->_cooked_size = sec->_raw_size; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| internal_relocs = (_bfd_elf32_link_read_relocs |
| (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| link_info->keep_memory)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| if (! link_info->keep_memory) |
| free_relocs = internal_relocs; |
| |
| have_code = false; |
| |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma laddr, paddr, symval; |
| unsigned short insn; |
| Elf_Internal_Rela *irelfn, *irelscan, *irelcount; |
| bfd_signed_vma foff; |
| |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_CODE) |
| have_code = true; |
| |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_USES) |
| continue; |
| |
| /* Get the section contents. */ |
| if (contents == NULL) |
| { |
| if (elf_section_data (sec)->this_hdr.contents != NULL) |
| contents = elf_section_data (sec)->this_hdr.contents; |
| else |
| { |
| contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| if (contents == NULL) |
| goto error_return; |
| free_contents = contents; |
| |
| if (! bfd_get_section_contents (abfd, sec, contents, |
| (file_ptr) 0, sec->_raw_size)) |
| goto error_return; |
| } |
| } |
| |
| /* The r_addend field of the R_SH_USES reloc will point us to |
| the register load. The 4 is because the r_addend field is |
| computed as though it were a jump offset, which are based |
| from 4 bytes after the jump instruction. */ |
| laddr = irel->r_offset + 4 + irel->r_addend; |
| if (laddr >= sec->_raw_size) |
| { |
| (*_bfd_error_handler) (_("%s: 0x%lx: warning: bad R_SH_USES offset"), |
| bfd_get_filename (abfd), |
| (unsigned long) irel->r_offset); |
| continue; |
| } |
| insn = bfd_get_16 (abfd, contents + laddr); |
| |
| /* If the instruction is not mov.l NN,rN, we don't know what to |
| do. */ |
| if ((insn & 0xf000) != 0xd000) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: warning: R_SH_USES points to unrecognized insn 0x%x"), |
| bfd_get_filename (abfd), (unsigned long) irel->r_offset, insn)); |
| continue; |
| } |
| |
| /* Get the address from which the register is being loaded. The |
| displacement in the mov.l instruction is quadrupled. It is a |
| displacement from four bytes after the movl instruction, but, |
| before adding in the PC address, two least significant bits |
| of the PC are cleared. We assume that the section is aligned |
| on a four byte boundary. */ |
| paddr = insn & 0xff; |
| paddr *= 4; |
| paddr += (laddr + 4) &~ 3; |
| if (paddr >= sec->_raw_size) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: warning: bad R_SH_USES load offset"), |
| bfd_get_filename (abfd), (unsigned long) irel->r_offset)); |
| continue; |
| } |
| |
| /* Get the reloc for the address from which the register is |
| being loaded. This reloc will tell us which function is |
| actually being called. */ |
| for (irelfn = internal_relocs; irelfn < irelend; irelfn++) |
| if (irelfn->r_offset == paddr |
| && ELF32_R_TYPE (irelfn->r_info) == (int) R_SH_DIR32) |
| break; |
| if (irelfn >= irelend) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: warning: could not find expected reloc"), |
| bfd_get_filename (abfd), (unsigned long) paddr)); |
| continue; |
| } |
| |
| /* Read this BFD's symbols if we haven't done so already. */ |
| if (extsyms == NULL) |
| { |
| if (symtab_hdr->contents != NULL) |
| extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| else |
| { |
| extsyms = ((Elf32_External_Sym *) |
| bfd_malloc (symtab_hdr->sh_size)); |
| if (extsyms == NULL) |
| goto error_return; |
| free_extsyms = extsyms; |
| if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) |
| != symtab_hdr->sh_size)) |
| goto error_return; |
| } |
| } |
| |
| /* Get the value of the symbol referred to by the reloc. */ |
| if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info) |
| { |
| Elf_Internal_Sym isym; |
| |
| /* A local symbol. */ |
| bfd_elf32_swap_symbol_in (abfd, |
| extsyms + ELF32_R_SYM (irelfn->r_info), |
| &isym); |
| |
| if (isym.st_shndx != _bfd_elf_section_from_bfd_section (abfd, sec)) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: warning: symbol in unexpected section"), |
| bfd_get_filename (abfd), (unsigned long) paddr)); |
| continue; |
| } |
| |
| symval = (isym.st_value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else |
| { |
| unsigned long indx; |
| struct elf_link_hash_entry *h; |
| |
| indx = ELF32_R_SYM (irelfn->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); |
| } |
| |
| symval += bfd_get_32 (abfd, contents + paddr); |
| |
| /* See if this function call can be shortened. */ |
| foff = (symval |
| - (irel->r_offset |
| + sec->output_section->vma |
| + sec->output_offset |
| + 4)); |
| if (foff < -0x1000 || foff >= 0x1000) |
| { |
| /* After all that work, we can't shorten this function call. */ |
| continue; |
| } |
| |
| /* Shorten the function call. */ |
| |
| /* 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. */ |
| |
| elf_section_data (sec)->relocs = internal_relocs; |
| free_relocs = NULL; |
| |
| elf_section_data (sec)->this_hdr.contents = contents; |
| free_contents = NULL; |
| |
| symtab_hdr->contents = (bfd_byte *) extsyms; |
| free_extsyms = NULL; |
| |
| /* Replace the jsr with a bsr. */ |
| |
| /* Change the R_SH_USES reloc into an R_SH_IND12W reloc, and |
| replace the jsr with a bsr. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_SH_IND12W); |
| if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info) |
| { |
| /* If this needs to be changed because of future relaxing, |
| it will be handled here like other internal IND12W |
| relocs. */ |
| bfd_put_16 (abfd, |
| 0xb000 | ((foff >> 1) & 0xfff), |
| contents + irel->r_offset); |
| } |
| else |
| { |
| /* We can't fully resolve this yet, because the external |
| symbol value may be changed by future relaxing. We let |
| the final link phase handle it. */ |
| bfd_put_16 (abfd, 0xb000, contents + irel->r_offset); |
| } |
| |
| /* See if there is another R_SH_USES reloc referring to the same |
| register load. */ |
| for (irelscan = internal_relocs; irelscan < irelend; irelscan++) |
| if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_USES |
| && laddr == irelscan->r_offset + 4 + irelscan->r_addend) |
| break; |
| if (irelscan < irelend) |
| { |
| /* Some other function call depends upon this register load, |
| and we have not yet converted that function call. |
| Indeed, we may never be able to convert it. There is |
| nothing else we can do at this point. */ |
| continue; |
| } |
| |
| /* Look for a R_SH_COUNT reloc on the location where the |
| function address is stored. Do this before deleting any |
| bytes, to avoid confusion about the address. */ |
| for (irelcount = internal_relocs; irelcount < irelend; irelcount++) |
| if (irelcount->r_offset == paddr |
| && ELF32_R_TYPE (irelcount->r_info) == (int) R_SH_COUNT) |
| break; |
| |
| /* Delete the register load. */ |
| if (! sh_elf_relax_delete_bytes (abfd, sec, laddr, 2)) |
| goto error_return; |
| |
| /* That will change things, so, just in case it permits some |
| other function call to come within range, we should relax |
| again. Note that this is not required, and it may be slow. */ |
| *again = true; |
| |
| /* Now check whether we got a COUNT reloc. */ |
| if (irelcount >= irelend) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: warning: could not find expected COUNT reloc"), |
| bfd_get_filename (abfd), (unsigned long) paddr)); |
| continue; |
| } |
| |
| /* The number of uses is stored in the r_addend field. We've |
| just deleted one. */ |
| if (irelcount->r_addend == 0) |
| { |
| ((*_bfd_error_handler) (_("%s: 0x%lx: warning: bad count"), |
| bfd_get_filename (abfd), |
| (unsigned long) paddr)); |
| continue; |
| } |
| |
| --irelcount->r_addend; |
| |
| /* If there are no more uses, we can delete the address. Reload |
| the address from irelfn, in case it was changed by the |
| previous call to sh_elf_relax_delete_bytes. */ |
| if (irelcount->r_addend == 0) |
| { |
| if (! sh_elf_relax_delete_bytes (abfd, sec, irelfn->r_offset, 4)) |
| goto error_return; |
| } |
| |
| /* We've done all we can with that function call. */ |
| } |
| |
| /* Look for load and store instructions that we can align on four |
| byte boundaries. */ |
| if (have_code) |
| { |
| boolean swapped; |
| |
| /* Get the section contents. */ |
| if (contents == NULL) |
| { |
| if (elf_section_data (sec)->this_hdr.contents != NULL) |
| contents = elf_section_data (sec)->this_hdr.contents; |
| else |
| { |
| contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| if (contents == NULL) |
| goto error_return; |
| free_contents = contents; |
| |
| if (! bfd_get_section_contents (abfd, sec, contents, |
| (file_ptr) 0, sec->_raw_size)) |
| goto error_return; |
| } |
| } |
| |
| if (! sh_elf_align_loads (abfd, sec, internal_relocs, contents, |
| &swapped)) |
| goto error_return; |
| |
| if (swapped) |
| { |
| elf_section_data (sec)->relocs = internal_relocs; |
| free_relocs = NULL; |
| |
| elf_section_data (sec)->this_hdr.contents = contents; |
| free_contents = NULL; |
| |
| symtab_hdr->contents = (bfd_byte *) extsyms; |
| free_extsyms = NULL; |
| } |
| } |
| |
| if (free_relocs != NULL) |
| { |
| free (free_relocs); |
| free_relocs = NULL; |
| } |
| |
| if (free_contents != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_contents); |
| else |
| { |
| /* Cache the section contents for elf_link_input_bfd. */ |
| elf_section_data (sec)->this_hdr.contents = contents; |
| } |
| free_contents = NULL; |
| } |
| |
| if (free_extsyms != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_extsyms); |
| else |
| { |
| /* Cache the symbols for elf_link_input_bfd. */ |
| symtab_hdr->contents = extsyms; |
| } |
| free_extsyms = NULL; |
| } |
| |
| return true; |
| |
| error_return: |
| if (free_relocs != NULL) |
| free (free_relocs); |
| if (free_contents != NULL) |
| free (free_contents); |
| if (free_extsyms != NULL) |
| free (free_extsyms); |
| return false; |
| } |
| |
| /* Delete some bytes from a section while relaxing. FIXME: There is a |
| lot of duplication between this function and sh_relax_delete_bytes |
| in coff-sh.c. */ |
| |
| static boolean |
| sh_elf_relax_delete_bytes (abfd, sec, addr, count) |
| bfd *abfd; |
| asection *sec; |
| bfd_vma addr; |
| int count; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf32_External_Sym *extsyms; |
| int shndx, index; |
| bfd_byte *contents; |
| Elf_Internal_Rela *irel, *irelend; |
| Elf_Internal_Rela *irelalign; |
| bfd_vma toaddr; |
| Elf32_External_Sym *esym, *esymend; |
| struct elf_link_hash_entry *sym_hash; |
| asection *o; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| |
| 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->_cooked_size; |
| |
| irel = elf_section_data (sec)->relocs; |
| irelend = irel + sec->reloc_count; |
| for (; irel < irelend; irel++) |
| { |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN |
| && irel->r_offset > addr |
| && count < (1 << irel->r_addend)) |
| { |
| irelalign = irel; |
| toaddr = irel->r_offset; |
| break; |
| } |
| } |
| |
| /* Actually delete the bytes. */ |
| memmove (contents + addr, contents + addr + count, toaddr - addr - count); |
| if (irelalign == NULL) |
| sec->_cooked_size -= count; |
| else |
| { |
| int i; |
| |
| #define NOP_OPCODE (0x0009) |
| |
| BFD_ASSERT ((count & 1) == 0); |
| for (i = 0; i < count; i += 2) |
| bfd_put_16 (abfd, NOP_OPCODE, contents + toaddr - count + i); |
| } |
| |
| /* Adjust all the relocs. */ |
| for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| { |
| bfd_vma nraddr, stop; |
| bfd_vma start = 0; |
| int insn = 0; |
| Elf_Internal_Sym sym; |
| int off, adjust, oinsn; |
| bfd_signed_vma voff = 0; |
| boolean overflow; |
| |
| /* Get the new reloc address. */ |
| nraddr = irel->r_offset; |
| if ((irel->r_offset > addr |
| && irel->r_offset < toaddr) |
| || (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN |
| && irel->r_offset == toaddr)) |
| nraddr -= count; |
| |
| /* See if this reloc was for the bytes we have deleted, in which |
| case we no longer care about it. Don't delete relocs which |
| represent addresses, though. */ |
| if (irel->r_offset >= addr |
| && irel->r_offset < addr + count |
| && ELF32_R_TYPE (irel->r_info) != (int) R_SH_ALIGN |
| && ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE |
| && ELF32_R_TYPE (irel->r_info) != (int) R_SH_DATA |
| && ELF32_R_TYPE (irel->r_info) != (int) R_SH_LABEL) |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| (int) R_SH_NONE); |
| |
| /* If this is a PC relative reloc, see if the range it covers |
| includes the bytes we have deleted. */ |
| switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) |
| { |
| default: |
| break; |
| |
| case R_SH_DIR8WPN: |
| case R_SH_IND12W: |
| case R_SH_DIR8WPZ: |
| case R_SH_DIR8WPL: |
| start = irel->r_offset; |
| insn = bfd_get_16 (abfd, contents + nraddr); |
| break; |
| } |
| |
| switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) |
| { |
| default: |
| start = stop = addr; |
| break; |
| |
| case R_SH_DIR32: |
| /* If this reloc is against a symbol defined in this |
| section, and the symbol will not be adjusted below, we |
| must check the addend to see it will put the value in |
| range to be adjusted, and hence must be changed. */ |
| if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| { |
| bfd_elf32_swap_symbol_in (abfd, |
| extsyms + ELF32_R_SYM (irel->r_info), |
| &sym); |
| if (sym.st_shndx == shndx |
| && (sym.st_value <= addr |
| || sym.st_value >= toaddr)) |
| { |
| bfd_vma val; |
| |
| val = bfd_get_32 (abfd, contents + nraddr); |
| val += sym.st_value; |
| if (val > addr && val < toaddr) |
| bfd_put_32 (abfd, val - count, contents + nraddr); |
| } |
| } |
| start = stop = addr; |
| break; |
| |
| case R_SH_DIR8WPN: |
| off = insn & 0xff; |
| if (off & 0x80) |
| off -= 0x100; |
| stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); |
| break; |
| |
| case R_SH_IND12W: |
| if (ELF32_R_SYM (irel->r_info) >= symtab_hdr->sh_info) |
| start = stop = addr; |
| else |
| { |
| off = insn & 0xfff; |
| if (off & 0x800) |
| off -= 0x1000; |
| stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); |
| } |
| break; |
| |
| case R_SH_DIR8WPZ: |
| off = insn & 0xff; |
| stop = start + 4 + off * 2; |
| break; |
| |
| case R_SH_DIR8WPL: |
| off = insn & 0xff; |
| stop = (start &~ (bfd_vma) 3) + 4 + off * 4; |
| break; |
| |
| case R_SH_SWITCH8: |
| case R_SH_SWITCH16: |
| case R_SH_SWITCH32: |
| /* These relocs types represent |
| .word L2-L1 |
| The r_offset field holds the difference between the reloc |
| address and L1. That is the start of the reloc, and |
| adding in the contents gives us the top. We must adjust |
| both the r_offset field and the section contents. */ |
| |
| start = irel->r_offset; |
| stop = (bfd_vma) ((bfd_signed_vma) start - (long) irel->r_addend); |
| |
| if (start > addr |
| && start < toaddr |
| && (stop <= addr || stop >= toaddr)) |
| irel->r_addend += count; |
| else if (stop > addr |
| && stop < toaddr |
| && (start <= addr || start >= toaddr)) |
| irel->r_addend -= count; |
| |
| start = stop; |
| |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH16) |
| voff = bfd_get_signed_16 (abfd, contents + nraddr); |
| else if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH8) |
| voff = bfd_get_8 (abfd, contents + nraddr); |
| else |
| voff = bfd_get_signed_32 (abfd, contents + nraddr); |
| stop = (bfd_vma) ((bfd_signed_vma) start + voff); |
| |
| break; |
| |
| case R_SH_USES: |
| start = irel->r_offset; |
| stop = (bfd_vma) ((bfd_signed_vma) start |
| + (long) irel->r_addend |
| + 4); |
| break; |
| } |
| |
| if (start > addr |
| && start < toaddr |
| && (stop <= addr || stop >= toaddr)) |
| adjust = count; |
| else if (stop > addr |
| && stop < toaddr |
| && (start <= addr || start >= toaddr)) |
| adjust = - count; |
| else |
| adjust = 0; |
| |
| if (adjust != 0) |
| { |
| oinsn = insn; |
| overflow = false; |
| switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) |
| { |
| default: |
| abort (); |
| break; |
| |
| case R_SH_DIR8WPN: |
| case R_SH_DIR8WPZ: |
| insn += adjust / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, contents + nraddr); |
| break; |
| |
| case R_SH_IND12W: |
| insn += adjust / 2; |
| if ((oinsn & 0xf000) != (insn & 0xf000)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, contents + nraddr); |
| break; |
| |
| case R_SH_DIR8WPL: |
| BFD_ASSERT (adjust == count || count >= 4); |
| if (count >= 4) |
| insn += adjust / 4; |
| else |
| { |
| if ((irel->r_offset & 3) == 0) |
| ++insn; |
| } |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, contents + nraddr); |
| break; |
| |
| case R_SH_SWITCH16: |
| voff += adjust; |
| if (voff < - 0x8000 || voff >= 0x8000) |
| overflow = true; |
| bfd_put_signed_16 (abfd, voff, contents + nraddr); |
| break; |
| |
| case R_SH_SWITCH32: |
| voff += adjust; |
| bfd_put_signed_32 (abfd, voff, contents + nraddr); |
| break; |
| |
| case R_SH_USES: |
| irel->r_addend += adjust; |
| break; |
| } |
| |
| if (overflow) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: fatal: reloc overflow while relaxing"), |
| bfd_get_filename (abfd), (unsigned long) irel->r_offset)); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| |
| irel->r_offset = nraddr; |
| } |
| |
| /* Look through all the other sections. If there contain any IMM32 |
| relocs against internal symbols which we are not going to adjust |
| below, we may need to adjust the addends. */ |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| Elf_Internal_Rela *internal_relocs; |
| Elf_Internal_Rela *irelscan, *irelscanend; |
| bfd_byte *ocontents; |
| |
| if (o == sec |
| || (o->flags & SEC_RELOC) == 0 |
| || o->reloc_count == 0) |
| continue; |
| |
| /* We always cache the relocs. Perhaps, if info->keep_memory is |
| false, we should free them, if we are permitted to, when we |
| leave sh_coff_relax_section. */ |
| internal_relocs = (_bfd_elf32_link_read_relocs |
| (abfd, o, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| true)); |
| if (internal_relocs == NULL) |
| return false; |
| |
| ocontents = NULL; |
| irelscanend = internal_relocs + o->reloc_count; |
| for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++) |
| { |
| Elf_Internal_Sym sym; |
| |
| if (ELF32_R_TYPE (irelscan->r_info) != (int) R_SH_DIR32) |
| continue; |
| |
| if (ELF32_R_SYM (irelscan->r_info) >= symtab_hdr->sh_info) |
| continue; |
| |
| bfd_elf32_swap_symbol_in (abfd, |
| extsyms + ELF32_R_SYM (irelscan->r_info), |
| &sym); |
| |
| if (sym.st_shndx == shndx |
| && (sym.st_value <= addr |
| || sym.st_value >= toaddr)) |
| { |
| bfd_vma val; |
| |
| if (ocontents == NULL) |
| { |
| if (elf_section_data (o)->this_hdr.contents != NULL) |
| ocontents = elf_section_data (o)->this_hdr.contents; |
| else |
| { |
| /* We always cache the section contents. |
| Perhaps, if info->keep_memory is false, we |
| should free them, if we are permitted to, |
| when we leave sh_coff_relax_section. */ |
| ocontents = (bfd_byte *) bfd_malloc (o->_raw_size); |
| if (ocontents == NULL) |
| return false; |
| if (! bfd_get_section_contents (abfd, o, ocontents, |
| (file_ptr) 0, |
| o->_raw_size)) |
| return false; |
| elf_section_data (o)->this_hdr.contents = ocontents; |
| } |
| } |
| |
| val = bfd_get_32 (abfd, ocontents + irelscan->r_offset); |
| val += sym.st_value; |
| if (val > addr && val < toaddr) |
| bfd_put_32 (abfd, val - count, |
| ocontents + irelscan->r_offset); |
| } |
| } |
| } |
| |
| /* Adjust the local symbols defined in this section. */ |
| esym = extsyms; |
| esymend = esym + symtab_hdr->sh_info; |
| for (; esym < esymend; esym++) |
| { |
| Elf_Internal_Sym isym; |
| |
| bfd_elf32_swap_symbol_in (abfd, esym, &isym); |
| |
| if (isym.st_shndx == shndx |
| && isym.st_value > addr |
| && isym.st_value < toaddr) |
| { |
| isym.st_value -= count; |
| bfd_elf32_swap_symbol_out (abfd, &isym, esym); |
| } |
| } |
| |
| /* Now adjust the global symbols defined in this section. */ |
| esym = extsyms + symtab_hdr->sh_info; |
| esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); |
| for (index = 0; esym < esymend; esym++, index++) |
| { |
| Elf_Internal_Sym isym; |
| |
| bfd_elf32_swap_symbol_in (abfd, esym, &isym); |
| sym_hash = elf_sym_hashes (abfd)[index]; |
| if (isym.st_shndx == shndx |
| && ((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; |
| } |
| } |
| |
| /* See if we can move the ALIGN reloc forward. We have adjusted |
| r_offset for it already. */ |
| if (irelalign != NULL) |
| { |
| bfd_vma alignto, alignaddr; |
| |
| alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend); |
| alignaddr = BFD_ALIGN (irelalign->r_offset, |
| 1 << irelalign->r_addend); |
| if (alignto != alignaddr) |
| { |
| /* Tail recursion. */ |
| return sh_elf_relax_delete_bytes (abfd, sec, alignaddr, |
| alignto - alignaddr); |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Look for loads and stores which we can align to four byte |
| boundaries. This is like sh_align_loads in coff-sh.c. */ |
| |
| static boolean |
| sh_elf_align_loads (abfd, sec, internal_relocs, contents, pswapped) |
| bfd *abfd; |
| asection *sec; |
| Elf_Internal_Rela *internal_relocs; |
| bfd_byte *contents; |
| boolean *pswapped; |
| { |
| Elf_Internal_Rela *irel, *irelend; |
| bfd_vma *labels = NULL; |
| bfd_vma *label, *label_end; |
| |
| *pswapped = false; |
| |
| irelend = internal_relocs + sec->reloc_count; |
| |
| /* Get all the addresses with labels on them. */ |
| labels = (bfd_vma *) bfd_malloc (sec->reloc_count * sizeof (bfd_vma)); |
| if (labels == NULL) |
| goto error_return; |
| label_end = labels; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_LABEL) |
| { |
| *label_end = irel->r_offset; |
| ++label_end; |
| } |
| } |
| |
| /* Note that the assembler currently always outputs relocs in |
| address order. If that ever changes, this code will need to sort |
| the label values and the relocs. */ |
| |
| label = labels; |
| |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma start, stop; |
| |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE) |
| continue; |
| |
| start = irel->r_offset; |
| |
| for (irel++; irel < irelend; irel++) |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_DATA) |
| break; |
| if (irel < irelend) |
| stop = irel->r_offset; |
| else |
| stop = sec->_cooked_size; |
| |
| if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_elf_swap_insns, |
| (PTR) internal_relocs, &label, |
| label_end, start, stop, pswapped)) |
| goto error_return; |
| } |
| |
| free (labels); |
| |
| return true; |
| |
| error_return: |
| if (labels != NULL) |
| free (labels); |
| return false; |
| } |
| |
| /* Swap two SH instructions. This is like sh_swap_insns in coff-sh.c. */ |
| |
| static boolean |
| sh_elf_swap_insns (abfd, sec, relocs, contents, addr) |
| bfd *abfd; |
| asection *sec; |
| PTR relocs; |
| bfd_byte *contents; |
| bfd_vma addr; |
| { |
| Elf_Internal_Rela *internal_relocs = (Elf_Internal_Rela *) relocs; |
| unsigned short i1, i2; |
| Elf_Internal_Rela *irel, *irelend; |
| |
| /* Swap the instructions themselves. */ |
| i1 = bfd_get_16 (abfd, contents + addr); |
| i2 = bfd_get_16 (abfd, contents + addr + 2); |
| bfd_put_16 (abfd, i2, contents + addr); |
| bfd_put_16 (abfd, i1, contents + addr + 2); |
| |
| /* Adjust all reloc addresses. */ |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| enum elf_sh_reloc_type type; |
| int add; |
| |
| /* There are a few special types of relocs that we don't want to |
| adjust. These relocs do not apply to the instruction itself, |
| but are only associated with the address. */ |
| type = (enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info); |
| if (type == R_SH_ALIGN |
| || type == R_SH_CODE |
| || type == R_SH_DATA |
| || type == R_SH_LABEL) |
| continue; |
| |
| /* If an R_SH_USES reloc points to one of the addresses being |
| swapped, we must adjust it. It would be incorrect to do this |
| for a jump, though, since we want to execute both |
| instructions after the jump. (We have avoided swapping |
| around a label, so the jump will not wind up executing an |
| instruction it shouldn't). */ |
| if (type == R_SH_USES) |
| { |
| bfd_vma off; |
| |
| off = irel->r_offset + 4 + irel->r_addend; |
| if (off == addr) |
| irel->r_offset += 2; |
| else if (off == addr + 2) |
| irel->r_offset -= 2; |
| } |
| |
| if (irel->r_offset == addr) |
| { |
| irel->r_offset += 2; |
| add = -2; |
| } |
| else if (irel->r_offset == addr + 2) |
| { |
| irel->r_offset -= 2; |
| add = 2; |
| } |
| else |
| add = 0; |
| |
| if (add != 0) |
| { |
| bfd_byte *loc; |
| unsigned short insn, oinsn; |
| boolean overflow; |
| |
| loc = contents + irel->r_offset; |
| overflow = false; |
| switch (type) |
| { |
| default: |
| break; |
| |
| case R_SH_DIR8WPN: |
| case R_SH_DIR8WPZ: |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, loc); |
| break; |
| |
| case R_SH_IND12W: |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xf000) != (insn & 0xf000)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, loc); |
| break; |
| |
| case R_SH_DIR8WPL: |
| /* This reloc ignores the least significant 3 bits of |
| the program counter before adding in the offset. |
| This means that if ADDR is at an even address, the |
| swap will not affect the offset. If ADDR is an at an |
| odd address, then the instruction will be crossing a |
| four byte boundary, and must be adjusted. */ |
| if ((addr & 3) != 0) |
| { |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, insn, loc); |
| } |
| |
| break; |
| } |
| |
| if (overflow) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: 0x%lx: fatal: reloc overflow while relaxing"), |
| bfd_get_filename (abfd), (unsigned long) irel->r_offset)); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Relocate an SH ELF section. */ |
| |
| static boolean |
| sh_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| contents, relocs, local_syms, local_sections) |
| 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; |
| |
| 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_vma addend = (bfd_vma)0; |
| bfd_reloc_status_type r; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| |
| if (info->relocateable) |
| { |
| /* This is a relocateable link. We don't have to change |
| anything, unless the reloc is against a section symbol, |
| in which case we have to adjust according to where the |
| section symbol winds up in the output section. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| sec = local_sections[r_symndx]; |
| rel->r_addend += sec->output_offset + sym->st_value; |
| } |
| } |
| |
| continue; |
| } |
| |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| /* Many of the relocs are only used for relaxing, and are |
| handled entirely by the relaxation code. */ |
| if (r_type > (int) R_SH_LAST_INVALID_RELOC) |
| continue; |
| |
| if (r_type < 0 |
| || r_type >= (int) R_SH_FIRST_INVALID_RELOC) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| /* FIXME: This is certainly incorrect. However, it is how the |
| COFF linker works. */ |
| if (r_type != (int) R_SH_DIR32 |
| && r_type != (int) R_SH_IND12W) |
| continue; |
| |
| howto = sh_elf_howto_table + r_type; |
| |
| /* This is a final link. */ |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* There is nothing to be done for an internal IND12W |
| relocation. FIXME: This is probably wrong, but it's how |
| the COFF relocations work. */ |
| if (r_type == (int) R_SH_IND12W) |
| continue; |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = (sec->output_section->vma |
| + sec->output_offset |
| + sym->st_value); |
| } |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| relocation = 0; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, |
| input_section, rel->r_offset))) |
| return false; |
| relocation = 0; |
| } |
| } |
| |
| /* FIXME: This is how the COFF relocations work. */ |
| if (r_type == (int) R_SH_IND12W) |
| relocation -= 4; |
| |
| switch ((int)r_type) |
| { |
| case (int)R_SH_DIR32: |
| addend = rel->r_addend; |
| break; |
| } |
| |
| /* COFF relocs don't use the addend. The addend is used for R_SH_DIR32 |
| to be compatible with other compilers. */ |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, addend); |
| |
| if (r != bfd_reloc_ok) |
| { |
| switch (r) |
| { |
| default: |
| case bfd_reloc_outofrange: |
| abort (); |
| case bfd_reloc_overflow: |
| { |
| const char *name; |
| |
| 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) |
| return false; |
| if (*name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, howto->name, (bfd_vma) 0, |
| 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 sh_elf_relocate_section. */ |
| |
| static bfd_byte * |
| sh_elf_get_relocated_section_contents (output_bfd, link_info, link_order, |
| data, relocateable, symbols) |
| bfd *output_bfd; |
| struct bfd_link_info *link_info; |
| struct bfd_link_order *link_order; |
| bfd_byte *data; |
| boolean relocateable; |
| 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; |
| Elf32_External_Sym *external_syms = NULL; |
| Elf_Internal_Sym *internal_syms = NULL; |
| |
| /* We only need to handle the case of relaxing, or of having a |
| particular set of section contents, specially. */ |
| if (relocateable |
| || elf_section_data (input_section)->this_hdr.contents == NULL) |
| return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| link_order, data, |
| relocateable, |
| symbols); |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| |
| memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| input_section->_raw_size); |
| |
| if ((input_section->flags & SEC_RELOC) != 0 |
| && input_section->reloc_count > 0) |
| { |
| Elf_Internal_Sym *isymp; |
| asection **secpp; |
| Elf32_External_Sym *esym, *esymend; |
| |
| if (symtab_hdr->contents != NULL) |
| external_syms = (Elf32_External_Sym *) symtab_hdr->contents; |
| else |
| { |
| external_syms = ((Elf32_External_Sym *) |
| bfd_malloc (symtab_hdr->sh_info |
| * sizeof (Elf32_External_Sym))); |
| if (external_syms == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| || (bfd_read (external_syms, sizeof (Elf32_External_Sym), |
| symtab_hdr->sh_info, input_bfd) |
| != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) |
| goto error_return; |
| } |
| |
| internal_relocs = (_bfd_elf32_link_read_relocs |
| (input_bfd, input_section, (PTR) NULL, |
| (Elf_Internal_Rela *) NULL, false)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| internal_syms = ((Elf_Internal_Sym *) |
| bfd_malloc (symtab_hdr->sh_info |
| * sizeof (Elf_Internal_Sym))); |
| if (internal_syms == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| |
| sections = (asection **) bfd_malloc (symtab_hdr->sh_info |
| * sizeof (asection *)); |
| if (sections == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| |
| isymp = internal_syms; |
| secpp = sections; |
| esym = external_syms; |
| esymend = esym + symtab_hdr->sh_info; |
| for (; esym < esymend; ++esym, ++isymp, ++secpp) |
| { |
| asection *isec; |
| |
| bfd_elf32_swap_symbol_in (input_bfd, esym, isymp); |
| |
| if (isymp->st_shndx == SHN_UNDEF) |
| isec = bfd_und_section_ptr; |
| else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE) |
| isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx); |
| else if (isymp->st_shndx == SHN_ABS) |
| isec = bfd_abs_section_ptr; |
| else if (isymp->st_shndx == SHN_COMMON) |
| isec = bfd_com_section_ptr; |
| else |
| { |
| /* Who knows? */ |
| isec = NULL; |
| } |
| |
| *secpp = isec; |
| } |
| |
| if (! sh_elf_relocate_section (output_bfd, link_info, input_bfd, |
| input_section, data, internal_relocs, |
| internal_syms, sections)) |
| goto error_return; |
| |
| if (sections != NULL) |
| free (sections); |
| sections = NULL; |
| if (internal_syms != NULL) |
| free (internal_syms); |
| internal_syms = NULL; |
| if (external_syms != NULL && symtab_hdr->contents == NULL) |
| free (external_syms); |
| external_syms = NULL; |
| if (internal_relocs != elf_section_data (input_section)->relocs) |
| free (internal_relocs); |
| internal_relocs = NULL; |
| } |
| |
| return data; |
| |
| error_return: |
| if (internal_relocs != NULL |
| && internal_relocs != elf_section_data (input_section)->relocs) |
| free (internal_relocs); |
| if (external_syms != NULL && symtab_hdr->contents == NULL) |
| free (external_syms); |
| if (internal_syms != NULL) |
| free (internal_syms); |
| if (sections != NULL) |
| free (sections); |
| return NULL; |
| } |
| static asection * |
| sh_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| Elf_Internal_Rela *rel; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| if (h != NULL) |
| { |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_SH_GNU_VTINHERIT: |
| case R_SH_GNU_VTENTRY: |
| break; |
| |
| default: |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| return h->root.u.def.section; |
| |
| case bfd_link_hash_common: |
| return h->root.u.c.p->section; |
| } |
| } |
| } |
| else |
| { |
| if (!(elf_bad_symtab (abfd) |
| && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| && sym->st_shndx != SHN_COMMON)) |
| { |
| return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| } |
| } |
| return NULL; |
| } |
| |
| static boolean |
| sh_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| /* we don't use got and plt entries for sh. */ |
| return true; |
| } |
| |
| /* Look through the relocs for a section during the first phase. |
| Since we don't do .gots or .plts, we just need to consider the |
| virtual table relocs for gc. */ |
| |
| static boolean |
| sh_elf_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| |
| if (info->relocateable) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
| if (!elf_bad_symtab (abfd)) |
| sym_hashes_end -= symtab_hdr->sh_info; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_SH_GNU_VTINHERIT: |
| if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_SH_GNU_VTENTRY: |
| if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return false; |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| #define TARGET_BIG_SYM bfd_elf32_sh_vec |
| #define TARGET_BIG_NAME "elf32-sh" |
| #define TARGET_LITTLE_SYM bfd_elf32_shl_vec |
| #define TARGET_LITTLE_NAME "elf32-shl" |
| #define ELF_ARCH bfd_arch_sh |
| #define ELF_MACHINE_CODE EM_SH |
| #define ELF_MAXPAGESIZE 0x1 |
| |
| #define elf_symbol_leading_char '_' |
| |
| #define bfd_elf32_bfd_reloc_type_lookup sh_elf_reloc_type_lookup |
| #define elf_info_to_howto sh_elf_info_to_howto |
| #define bfd_elf32_bfd_relax_section sh_elf_relax_section |
| #define elf_backend_relocate_section sh_elf_relocate_section |
| #define bfd_elf32_bfd_get_relocated_section_contents \ |
| sh_elf_get_relocated_section_contents |
| |
| #define elf_backend_gc_mark_hook sh_elf_gc_mark_hook |
| #define elf_backend_gc_sweep_hook sh_elf_gc_sweep_hook |
| #define elf_backend_check_relocs sh_elf_check_relocs |
| |
| #define elf_backend_can_gc_sections 1 |
| #include "elf32-target.h" |