From: Jeff Law Date: Tue, 4 Sep 2001 21:06:01 +0000 (+0000) Subject: * elf32-h8300.c (elf32_h8_relax_section): New function. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5907e6285ec51809f82011f923cc675c26c956cf;p=binutils-gdb.git * elf32-h8300.c (elf32_h8_relax_section): New function. (elf32_h8_relax_delete_bytes): Likewise. (elf32_h8_symbol_address_p): Likewise. (elf32_h8_get_relocated_section_contents): Likewise. (bfd_elf32_bfd_relax_section): Define. (bfd_elf32_bfd_get_relocated_section_contents): Likewise. --- diff --git a/bfd/ChangeLog b/bfd/ChangeLog index d7d454aca27..658e713485c 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,12 @@ 2001-09-04 Jeff Law + * elf32-h8300.c (elf32_h8_relax_section): New function. + (elf32_h8_relax_delete_bytes): Likewise. + (elf32_h8_symbol_address_p): Likewise. + (elf32_h8_get_relocated_section_contents): Likewise. + (bfd_elf32_bfd_relax_section): Define. + (bfd_elf32_bfd_get_relocated_section_contents): Likewise. + * elf32-h8300.c (special): New function. (h8_elf_howto_table): Use it for SPECIAL_FUNCTION field in all relocations. diff --git a/bfd/elf32-h8300.c b/bfd/elf32-h8300.c index 260b57ef3fd..54167b5bf58 100644 --- a/bfd/elf32-h8300.c +++ b/bfd/elf32-h8300.c @@ -649,6 +649,860 @@ elf32_h8_merge_private_bfd_data (ibfd, obfd) return true; } +/* This function handles relaxing for the H8.. + + There's a few relaxing opportunites available on the H8: + + jmp/jsr:24 -> bra/bsr:8 2 bytes + The jmp may be completely eliminated if the previous insn is a + conditional branch to the insn after the jump. In that case + we invert the branch and delete the jump and save 4 bytes. + + bCC:16 -> bCC:8 2 bytes + bsr:16 -> bsr:8 2 bytes + + mov.b:16 -> mov.b:8 2 bytes + mov.b:24/32 -> mov.b:8 4 bytes + + mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes + + +*/ + +static boolean +elf32_h8_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; + 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; + static asection *last_input_section = NULL; + static Elf_Internal_Rela *last_reloc = NULL; + + /* Assume nothing changes. */ + *again = false; + + /* We don't have to do anything for a relocateable link, if + this section does not have relocs, or if this is not a + code section. */ + if (link_info->relocateable + || (sec->flags & SEC_RELOC) == 0 + || sec->reloc_count == 0 + || (sec->flags & SEC_CODE) == 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; + + /* Get a copy of the native relocations. */ + 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; + + if (sec != last_input_section) + last_reloc = NULL; + + last_input_section = sec; + + /* Walk through the relocs looking for relaxing opportunities. */ + irelend = internal_relocs + sec->reloc_count; + for (irel = internal_relocs; irel < irelend; irel++) + { + bfd_vma symval; + + /* Keep track of the previous reloc so that we can delete + some long jumps created by the compiler. */ + if (irel != internal_relocs) + last_reloc = irel - 1; + + /* Get the section contents if we haven't done so already. */ + if (contents == NULL) + { + /* Get cached copy if it exists. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + contents = elf_section_data (sec)->this_hdr.contents; + else + { + /* Go get them off disk. */ + 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; + } + } + + /* Read this BFD's symbols if we haven't done so already. */ + if (extsyms == NULL) + { + /* Get cached copy if it exists. */ + if (symtab_hdr->contents != NULL) + extsyms = (Elf32_External_Sym *) symtab_hdr->contents; + else + { + /* Go get them off disk. */ + 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 (irel->r_info) < symtab_hdr->sh_info) + { + Elf_Internal_Sym isym; + asection *sym_sec; + + /* A local symbol. */ + bfd_elf32_swap_symbol_in (abfd, + extsyms + ELF32_R_SYM (irel->r_info), + &isym); + + 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. */ + switch (ELF32_R_TYPE (irel->r_info)) + { + /* Try to turn a 24 bit absolute branch/call into an 8 bit + pc-relative branch/call. */ + case R_H8_DIR24R8: + { + bfd_vma value = symval + irel->r_addend; + bfd_vma dot, gap; + + /* Get the address of this instruction. */ + dot = (sec->output_section->vma + + sec->output_offset + irel->r_offset - 1); + + /* Compute the distance from this insn to the branch target. */ + gap = value - dot; + + /* If the distance is within -126..+130 inclusive, then we can + relax this jump. +130 is valid since the target will move + two bytes closer if we do relax this branch. */ + if ((int)gap >= -126 && (int)gap <= 130) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + 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 the previous instruction conditionally jumped around + this instruction, we may be able to reverse the condition + and redirect the previous instruction to the target of + this instruction. + + Such sequences are used by the compiler to deal with + long conditional branches. */ + if (gap <= 130 + && gap >= -128 + && last_reloc + && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8 + && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info) + { + bfd_vma last_value; + asection *last_sym_sec; + Elf_Internal_Sym last_symbol; + + /* We will need to examine the symbol used by the + previous relocation. */ + + bfd_elf32_swap_symbol_in (abfd, + (extsyms + ELF32_R_SYM (last_reloc->r_info)), + &last_symbol); + + last_sym_sec + = bfd_section_from_elf_index (abfd, last_symbol.st_shndx); + last_value = (last_symbol.st_value + + last_sym_sec->output_section->vma + + last_sym_sec->output_offset); + + /* Verify that the previous relocation was for a + branch around this instruction and that no symbol + exists at the current location. */ + if (last_value == dot + 4 + && last_reloc->r_offset + 2 == irel->r_offset + && ! elf32_h8_symbol_address_p (abfd, sec, + extsyms, dot)) + { + /* We can eliminate this jump. Twiddle the + previous relocation as necessary. */ + irel->r_info + = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + ELF32_R_TYPE (R_H8_NONE)); + + last_reloc->r_info + = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + ELF32_R_TYPE (R_H8_PCREL8)); + last_reloc->r_addend = irel->r_addend; + + + code = bfd_get_8 (abfd, + contents + last_reloc->r_offset - 1); + code ^= 1; + bfd_put_8 (abfd, + code, + contents + last_reloc->r_offset - 1); + + /* Delete four bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset - 1, + 4)) + goto error_return; + + *again = true; + break; + } + } + + /* We could not eliminate this jump, so just shorten it. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + if (code == 0x5e) + bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); + else if (code == 0x5a) + bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); + else + abort (); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_PCREL8); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 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; + } + break; + } + + /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative + branch. */ + case R_H8_PCREL16: + { + bfd_vma value = symval + irel->r_addend; + bfd_vma dot; + bfd_vma gap; + + /* Get the address of this instruction. */ + dot = (sec->output_section->vma + + sec->output_offset + + irel->r_offset - 2); + + gap = value - dot; + + /* If the distance is within -126..+130 inclusive, then we can + relax this jump. +130 is valid since the target will move + two bytes closer if we do relax this branch. */ + if ((int)gap >= -126 && (int)gap <= 130) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + 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; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + if (code == 0x58) + { + /* bCC:16 -> bCC:8 */ + /* Get the condition code from the original insn. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + code &= 0xf0; + code >>= 4; + code |= 0x40; + bfd_put_8 (abfd, code, contents + irel->r_offset - 2); + } + else if (code == 0x5c) + bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); + else + abort (); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_PCREL8); + irel->r_offset--; + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 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; + } + break; + } + + /* This is a 16 bit absolute address in a "mov.b" insn, which may + become an 8 bit absolute address if its in the right range. */ + case R_H8_DIR16A8: + { + bfd_vma value = symval + irel->r_addend; + + if ((bfd_get_mach (abfd) == bfd_mach_h8300 + && value >= 0xff00 + && value <= 0xffff) + || ((bfd_get_mach (abfd) == bfd_mach_h8300h + || bfd_get_mach (abfd) == bfd_mach_h8300s) + && value >= 0xffff00 + && value <= 0xffffff)) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + 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; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + /* Sanity check. */ + if (code != 0x6a) + abort (); + + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + if ((code & 0xf0) == 0x00) + bfd_put_8 (abfd, + (code & 0xf) | 0x20, + contents + irel->r_offset - 2); + else if ((code & 0xf0) == 0x80) + bfd_put_8 (abfd, + (code & 0xf) | 0x30, + contents + irel->r_offset - 2); + else + abort (); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR8); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 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; + } + break; + } + + /* This is a 24 bit absolute address in a "mov.b" insn, which may + become an 8 bit absolute address if its in the right range. */ + case R_H8_DIR24A8: + { + bfd_vma value = symval + irel->r_addend; + + if ((bfd_get_mach (abfd) == bfd_mach_h8300 + && value >= 0xff00 + && value <= 0xffff) + || ((bfd_get_mach (abfd) == bfd_mach_h8300h + || bfd_get_mach (abfd) == bfd_mach_h8300s) + && value >= 0xffff00 + && value <= 0xffffff)) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + 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; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + /* Sanity check. */ + if (code != 0x6a) + abort (); + + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + if ((code & 0xf0) == 0x00) + bfd_put_8 (abfd, + (code & 0xf) | 0x20, + contents + irel->r_offset - 2); + else if ((code & 0xf0) == 0x80) + bfd_put_8 (abfd, + (code & 0xf) | 0x30, + contents + irel->r_offset - 2); + else + abort (); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR8); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset, 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; + } + } + + /* FALLTHRU */ + + /* This is a 24/32bit absolute address in a "mov" insn, which may + become a 16bit absoulte address if it is in the right range. */ + case R_H8_DIR32A16: + { + bfd_vma value = symval + irel->r_addend; + + if (value <= 0x7fff || value >= 0xff8000) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + 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; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* We just need to turn off bit 0x20. */ + code &= ~0x20; + + bfd_put_8 (abfd, code, contents + irel->r_offset - 1); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR16A8); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 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; + } + break; + } + + default: + break; + } + } + + 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. */ + +static boolean +elf32_h8_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; + + 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; + + /* Actually delete the bytes. */ + memmove (contents + addr, contents + addr + count, toaddr - addr - count); + sec->_cooked_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. */ + 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; + } + } + + return true; +} + +/* Return true if a symbol exists at the given address, else return + false. */ +static boolean +elf32_h8_symbol_address_p (abfd, sec, extsyms, addr) + bfd *abfd; + asection *sec; + Elf32_External_Sym *extsyms; + bfd_vma addr; +{ + Elf_Internal_Shdr *symtab_hdr; + int shndx; + Elf32_External_Sym *esym, *esymend; + struct elf_link_hash_entry **sym_hash, **sym_hash_end; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + shndx = _bfd_elf_section_from_bfd_section (abfd, sec); + + /* Examine all the symbols. */ + 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) + return true; + } + + sym_hash = elf_sym_hashes (abfd); + sym_hash_end = (sym_hash + + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) + - symtab_hdr->sh_info)); + for (; sym_hash < sym_hash_end; sym_hash++) + { + 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) + return true; + } + return false; +} + +/* This is a version of bfd_generic_get_relocated_section_contents + which uses elf32_h8_relocate_section. */ + +static bfd_byte * +elf32_h8_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 (! elf32_h8_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; +} + #define TARGET_BIG_SYM bfd_elf32_h8300_vec #define TARGET_BIG_NAME "elf32-h8300" @@ -678,4 +1532,10 @@ elf32_h8_merge_private_bfd_data (ibfd, obfd) /* Use an H8 specific linker, not the ELF generic linker. */ #define elf_backend_relocate_section elf32_h8_relocate_section +/* And relaxing stuff. */ +#define bfd_elf32_bfd_relax_section elf32_h8_relax_section +#define bfd_elf32_bfd_get_relocated_section_contents \ + elf32_h8_get_relocated_section_contents + + #include "elf32-target.h"