diff options
Diffstat (limited to 'binutils-2.17/bfd/elf-m10200.c')
| -rw-r--r-- | binutils-2.17/bfd/elf-m10200.c | 1405 |
1 files changed, 0 insertions, 1405 deletions
diff --git a/binutils-2.17/bfd/elf-m10200.c b/binutils-2.17/bfd/elf-m10200.c deleted file mode 100644 index a39e4389..00000000 --- a/binutils-2.17/bfd/elf-m10200.c +++ /dev/null @@ -1,1405 +0,0 @@ -/* Matsushita 10200 specific support for 32-bit ELF - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 - Free Software Foundation, Inc. - -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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" -#include "elf-bfd.h" - -static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup - PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); -static void mn10200_info_to_howto - PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); -static bfd_boolean mn10200_elf_relax_delete_bytes - PARAMS ((bfd *, asection *, bfd_vma, int)); -static bfd_boolean mn10200_elf_symbol_address_p - PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma)); -static bfd_reloc_status_type mn10200_elf_final_link_relocate - PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, - bfd_byte *, bfd_vma, bfd_vma, bfd_vma, - struct bfd_link_info *, asection *, int)); -static bfd_boolean mn10200_elf_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, - bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, - asection **)); -static bfd_boolean mn10200_elf_relax_section - PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *)); -static bfd_byte * mn10200_elf_get_relocated_section_contents - PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, - bfd_byte *, bfd_boolean, asymbol **)); - -enum reloc_type { - R_MN10200_NONE = 0, - R_MN10200_32, - R_MN10200_16, - R_MN10200_8, - R_MN10200_24, - R_MN10200_PCREL8, - R_MN10200_PCREL16, - R_MN10200_PCREL24, - R_MN10200_MAX -}; - -static reloc_howto_type elf_mn10200_howto_table[] = { - /* Dummy relocation. Does nothing. */ - HOWTO (R_MN10200_NONE, - 0, - 2, - 16, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_NONE", - FALSE, - 0, - 0, - FALSE), - /* Standard 32 bit reloc. */ - HOWTO (R_MN10200_32, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_32", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - /* Standard 16 bit reloc. */ - HOWTO (R_MN10200_16, - 0, - 1, - 16, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_16", - FALSE, - 0xffff, - 0xffff, - FALSE), - /* Standard 8 bit reloc. */ - HOWTO (R_MN10200_8, - 0, - 0, - 8, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_8", - FALSE, - 0xff, - 0xff, - FALSE), - /* Standard 24 bit reloc. */ - HOWTO (R_MN10200_24, - 0, - 2, - 24, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_24", - FALSE, - 0xffffff, - 0xffffff, - FALSE), - /* Simple 8 pc-relative reloc. */ - HOWTO (R_MN10200_PCREL8, - 0, - 0, - 8, - TRUE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_PCREL8", - FALSE, - 0xff, - 0xff, - TRUE), - /* Simple 16 pc-relative reloc. */ - HOWTO (R_MN10200_PCREL16, - 0, - 1, - 16, - TRUE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_PCREL16", - FALSE, - 0xffff, - 0xffff, - TRUE), - /* Simple 32bit pc-relative reloc with a 1 byte adjustment - to get the pc-relative offset correct. */ - HOWTO (R_MN10200_PCREL24, - 0, - 2, - 24, - TRUE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10200_PCREL24", - FALSE, - 0xffffff, - 0xffffff, - TRUE), -}; - -struct mn10200_reloc_map { - bfd_reloc_code_real_type bfd_reloc_val; - unsigned char elf_reloc_val; -}; - -static const struct mn10200_reloc_map mn10200_reloc_map[] = { - { BFD_RELOC_NONE , R_MN10200_NONE , }, - { BFD_RELOC_32 , R_MN10200_32 , }, - { BFD_RELOC_16 , R_MN10200_16 , }, - { BFD_RELOC_8 , R_MN10200_8 , }, - { BFD_RELOC_24 , R_MN10200_24 , }, - { BFD_RELOC_8_PCREL , R_MN10200_PCREL8 , }, - { BFD_RELOC_16_PCREL, R_MN10200_PCREL16, }, - { BFD_RELOC_24_PCREL, R_MN10200_PCREL24, }, -}; - -static reloc_howto_type * -bfd_elf32_bfd_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; -{ - unsigned int i; - - for (i = 0; - i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map); - i++) - { - if (mn10200_reloc_map[i].bfd_reloc_val == code) - return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val]; - } - - return NULL; -} - -/* Set the howto pointer for an MN10200 ELF reloc. */ - -static void -mn10200_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf_Internal_Rela *dst; -{ - unsigned int r_type; - - r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX); - cache_ptr->howto = &elf_mn10200_howto_table[r_type]; -} - -/* Perform a relocation as part of a final link. */ - -static bfd_reloc_status_type -mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd, - input_section, contents, offset, value, - addend, info, sym_sec, is_local) - reloc_howto_type *howto; - bfd *input_bfd; - bfd *output_bfd ATTRIBUTE_UNUSED; - asection *input_section; - bfd_byte *contents; - bfd_vma offset; - bfd_vma value; - bfd_vma addend; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sym_sec ATTRIBUTE_UNUSED; - int is_local ATTRIBUTE_UNUSED; -{ - unsigned long r_type = howto->type; - bfd_byte *hit_data = contents + offset; - - switch (r_type) - { - - case R_MN10200_NONE: - return bfd_reloc_ok; - - case R_MN10200_32: - value += addend; - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_16: - value += addend; - - if ((long) value > 0x7fff || (long) value < -0x8000) - return bfd_reloc_overflow; - - bfd_put_16 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_8: - value += addend; - - if ((long) value > 0x7f || (long) value < -0x80) - return bfd_reloc_overflow; - - bfd_put_8 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_24: - value += addend; - - if ((long) value > 0x7fffff || (long) value < -0x800000) - return bfd_reloc_overflow; - - value &= 0xffffff; - value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_PCREL8: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= (offset + 1); - value += addend; - - if ((long) value > 0xff || (long) value < -0x100) - return bfd_reloc_overflow; - - bfd_put_8 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_PCREL16: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= (offset + 2); - value += addend; - - if ((long) value > 0xffff || (long) value < -0x10000) - return bfd_reloc_overflow; - - bfd_put_16 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10200_PCREL24: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= (offset + 3); - value += addend; - - if ((long) value > 0xffffff || (long) value < -0x1000000) - return bfd_reloc_overflow; - - value &= 0xffffff; - value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - default: - return bfd_reloc_notsupported; - } -} - -/* Relocate an MN10200 ELF section. */ -static bfd_boolean -mn10200_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; - - 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 = elf_mn10200_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 = mn10200_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 = (const char *) 0; - - 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 function handles relaxing for the mn10200. - - There are quite a few relaxing opportunities available on the mn10200: - - * jsr:24 -> jsr:16 2 bytes - - * jmp:24 -> jmp:16 2 bytes - * jmp:16 -> bra:8 1 byte - - * If the previous instruction is a conditional branch - around the jump/bra, we may be able to reverse its condition - and change its target to the jump's target. The jump/bra - can then be deleted. 2 bytes - - * mov abs24 -> mov abs16 2 byte savings - - * Most instructions which accept imm24 can relax to imm16 2 bytes - - Most instructions which accept imm16 can relax to imm8 1 byte - - * Most instructions which accept d24 can relax to d16 2 bytes - - Most instructions which accept d16 can relax to d8 1 byte - - abs24, imm24, d24 all look the same at the reloc level. It - might make the code simpler if we had different relocs for - the various relaxable operand types. - - We don't handle imm16->imm8 or d16->d8 as they're very rare - and somewhat more difficult to support. */ - -static bfd_boolean -mn10200_elf_relax_section (abfd, sec, link_info, again) - 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, (PTR) NULL, (Elf_Internal_Rela *) 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_MN10200_NONE - || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_8 - || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_MAX) - 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; - else - { - /* Go get them off disk. */ - 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 24bit pc-relative branch/call into a 16bit pc-relative - branch/call. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL24) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= (irel->r_offset + 3); - value += irel->r_addend; - - /* See if the value will fit in 16 bits, note the high value is - 0x7fff + 2 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 0x8001 && (long) value > -0x8000) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - if (code != 0xe0 && code != 0xe1) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - /* Fix the opcode. */ - if (code == 0xe0) - bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 2); - else if (code == 0xe1) - bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10200_PCREL16); - - /* The opcode got shorter too, so we have to fix the offset. */ - irel->r_offset -= 1; - - /* Delete two bytes of data. */ - if (!mn10200_elf_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; - } - } - - /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative - branch. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL16) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= (irel->r_offset + 2); - value += irel->r_addend; - - /* See if the value will fit in 8 bits, note the high value is - 0x7f + 1 as the target will be one bytes closer if we are - able to relax. */ - if ((long) value < 0x80 && (long) value > -0x80) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - if (code != 0xfc) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xea, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10200_PCREL8); - - /* Delete one byte of data. */ - if (!mn10200_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 1)) - 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 eliminate an unconditional 8 bit pc-relative branch - which immediately follows a conditional 8 bit pc-relative - branch around the unconditional branch. - - original: new: - bCC lab1 bCC' lab2 - bra lab2 - lab1: lab1: - - This happens when the bCC can't reach lab2 at assembly time, - but due to other relaxations it can reach at link time. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL8) - { - Elf_Internal_Rela *nrel; - bfd_vma value = symval; - unsigned char code; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= (irel->r_offset + 1); - value += irel->r_addend; - - /* Do nothing if this reloc is the last byte in the section. */ - if (irel->r_offset == sec->size) - continue; - - /* See if the next instruction is an unconditional pc-relative - branch, more often than not this test will fail, so we - test it first to speed things up. */ - code = bfd_get_8 (abfd, contents + irel->r_offset + 1); - if (code != 0xea) - continue; - - /* Also make sure the next relocation applies to the next - instruction and that it's a pc-relative 8 bit branch. */ - nrel = irel + 1; - if (nrel == irelend - || irel->r_offset + 2 != nrel->r_offset - || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10200_PCREL8) - continue; - - /* Make sure our destination immediately follows the - unconditional branch. */ - if (symval != (sec->output_section->vma + sec->output_offset - + irel->r_offset + 3)) - continue; - - /* Now make sure we are a conditional branch. This may not - be necessary, but why take the chance. - - Note these checks assume that R_MN10200_PCREL8 relocs - only occur on bCC and bCCx insns. If they occured - elsewhere, we'd need to know the start of this insn - for this check to be accurate. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - if (code != 0xe0 && code != 0xe1 && code != 0xe2 - && code != 0xe3 && code != 0xe4 && code != 0xe5 - && code != 0xe6 && code != 0xe7 && code != 0xe8 - && code != 0xe9 && code != 0xec && code != 0xed - && code != 0xee && code != 0xef && code != 0xfc - && code != 0xfd && code != 0xfe && code != 0xff) - continue; - - /* We also have to be sure there is no symbol/label - at the unconditional branch. */ - if (mn10200_elf_symbol_address_p (abfd, sec, isymbuf, - irel->r_offset + 1)) - 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; - - /* Reverse the condition of the first branch. */ - switch (code) - { - case 0xfc: - code = 0xfd; - break; - case 0xfd: - code = 0xfc; - break; - case 0xfe: - code = 0xff; - break; - case 0xff: - code = 0xfe; - break; - case 0xe8: - code = 0xe9; - break; - case 0xe9: - code = 0xe8; - break; - case 0xe0: - code = 0xe2; - break; - case 0xe2: - code = 0xe0; - break; - case 0xe3: - code = 0xe1; - break; - case 0xe1: - code = 0xe3; - break; - case 0xe4: - code = 0xe6; - break; - case 0xe6: - code = 0xe4; - break; - case 0xe7: - code = 0xe5; - break; - case 0xe5: - code = 0xe7; - break; - case 0xec: - code = 0xed; - break; - case 0xed: - code = 0xec; - break; - case 0xee: - code = 0xef; - break; - case 0xef: - code = 0xee; - break; - } - bfd_put_8 (abfd, code, contents + irel->r_offset - 1); - - /* Set the reloc type and symbol for the first branch - from the second branch. */ - irel->r_info = nrel->r_info; - - /* Make the reloc for the second branch a null reloc. */ - nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), - R_MN10200_NONE); - - /* Delete two bytes of data. */ - if (!mn10200_elf_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; - } - - /* Try to turn a 24bit immediate, displacement or absolute address - into a 16bit immediate, displacement or absolute address. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_24) - { - bfd_vma value = symval; - - /* See if the value will fit in 16 bits. - We allow any 16bit match here. We prune those we can't - handle below. */ - if ((long) value < 0x7fff && (long) value > -0x8000) - { - unsigned char code; - - /* All insns which have 24bit operands are 5 bytes long, - the first byte will always be 0xf4, but we double check - it just in case. */ - - /* Get the first opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 2); - - if (code != 0xf4) - continue; - - /* Get the second opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - switch (code & 0xfc) - { - /* mov imm24,dn -> mov imm16,dn */ - case 0x70: - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 16bit value. */ - if (value & 0x8000) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xf8 + (code & 0x03), - contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10200_16); - - /* The opcode got shorter too, so we have to fix the - offset. */ - irel->r_offset -= 1; - - /* Delete two bytes of data. */ - if (!mn10200_elf_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; - - /* mov imm24,an -> mov imm16,an - cmp imm24,an -> cmp imm16,an - mov (abs24),dn -> mov (abs16),dn - mov dn,(abs24) -> mov dn,(abs16) - movb dn,(abs24) -> movb dn,(abs16) - movbu (abs24),dn -> movbu (abs16),dn */ - case 0x74: - case 0x7c: - case 0xc0: - case 0x40: - case 0x44: - case 0xc8: - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - if ((code & 0xfc) == 0x74) - code = 0xdc + (code & 0x03); - else if ((code & 0xfc) == 0x7c) - code = 0xec + (code & 0x03); - else if ((code & 0xfc) == 0xc0) - code = 0xc8 + (code & 0x03); - else if ((code & 0xfc) == 0x40) - code = 0xc0 + (code & 0x03); - else if ((code & 0xfc) == 0x44) - code = 0xc4 + (code & 0x03); - else if ((code & 0xfc) == 0xc8) - code = 0xcc + (code & 0x03); - - /* Fix the opcode. */ - bfd_put_8 (abfd, code, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10200_16); - - /* The opcode got shorter too, so we have to fix the - offset. */ - irel->r_offset -= 1; - - /* Delete two bytes of data. */ - if (!mn10200_elf_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; - - /* cmp imm24,dn -> cmp imm16,dn - mov (abs24),an -> mov (abs16),an - mov an,(abs24) -> mov an,(abs16) - add imm24,dn -> add imm16,dn - add imm24,an -> add imm16,an - sub imm24,dn -> sub imm16,dn - sub imm24,an -> sub imm16,an - And all d24->d16 in memory ops. */ - case 0x78: - case 0xd0: - case 0x50: - case 0x60: - case 0x64: - case 0x68: - case 0x6c: - case 0x80: - case 0xf0: - case 0x00: - case 0x10: - case 0xb0: - case 0x30: - case 0xa0: - case 0x20: - case 0x90: - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 16bit value. */ - if (((code & 0xfc) == 0x78 - || (code & 0xfc) == 0x60 - || (code & 0xfc) == 0x64 - || (code & 0xfc) == 0x68 - || (code & 0xfc) == 0x6c - || (code & 0xfc) == 0x80 - || (code & 0xfc) == 0xf0 - || (code & 0xfc) == 0x00 - || (code & 0xfc) == 0x10 - || (code & 0xfc) == 0xb0 - || (code & 0xfc) == 0x30 - || (code & 0xfc) == 0xa0 - || (code & 0xfc) == 0x20 - || (code & 0xfc) == 0x90) - && (value & 0x8000) != 0) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xf7, contents + irel->r_offset - 2); - - if ((code & 0xfc) == 0x78) - code = 0x48 + (code & 0x03); - else if ((code & 0xfc) == 0xd0) - code = 0x30 + (code & 0x03); - else if ((code & 0xfc) == 0x50) - code = 0x20 + (code & 0x03); - else if ((code & 0xfc) == 0x60) - code = 0x18 + (code & 0x03); - else if ((code & 0xfc) == 0x64) - code = 0x08 + (code & 0x03); - else if ((code & 0xfc) == 0x68) - code = 0x1c + (code & 0x03); - else if ((code & 0xfc) == 0x6c) - code = 0x0c + (code & 0x03); - else if ((code & 0xfc) == 0x80) - code = 0xc0 + (code & 0x07); - else if ((code & 0xfc) == 0xf0) - code = 0xb0 + (code & 0x07); - else if ((code & 0xfc) == 0x00) - code = 0x80 + (code & 0x07); - else if ((code & 0xfc) == 0x10) - code = 0xa0 + (code & 0x07); - else if ((code & 0xfc) == 0xb0) - code = 0x70 + (code & 0x07); - else if ((code & 0xfc) == 0x30) - code = 0x60 + (code & 0x07); - else if ((code & 0xfc) == 0xa0) - code = 0xd0 + (code & 0x07); - else if ((code & 0xfc) == 0x20) - code = 0x90 + (code & 0x07); - else if ((code & 0xfc) == 0x90) - code = 0x50 + (code & 0x07); - - 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_MN10200_16); - - /* Delete one bytes of data. */ - if (!mn10200_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 1)) - 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; - - /* movb (abs24),dn ->movbu (abs16),dn extxb bn */ - case 0xc4: - /* Note that we've changed the reldection contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - bfd_put_8 (abfd, 0xcc + (code & 0x03), - contents + irel->r_offset - 2); - - bfd_put_8 (abfd, 0xb8 + (code & 0x03), - contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10200_16); - - /* The reloc will be applied one byte in front of its - current location. */ - irel->r_offset -= 1; - - /* Delete one bytes of data. */ - if (!mn10200_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 1)) - 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; - } - } - } - } - - 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; -} - -/* Delete some bytes from a section while relaxing. */ - -static bfd_boolean -mn10200_elf_relax_delete_bytes (abfd, sec, addr, count) - 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; - 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) - 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 = 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; - 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; -} - -/* Return TRUE if a symbol exists at the given address, else return - FALSE. */ -static bfd_boolean -mn10200_elf_symbol_address_p (abfd, sec, isym, addr) - bfd *abfd; - asection *sec; - Elf_Internal_Sym *isym; - bfd_vma addr; -{ - Elf_Internal_Shdr *symtab_hdr; - unsigned int sec_shndx; - Elf_Internal_Sym *isymend; - struct elf_link_hash_entry **sym_hashes; - struct elf_link_hash_entry **end_hashes; - unsigned int symcount; - - sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - /* Examine all the local symbols. */ - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) - { - if (isym->st_shndx == sec_shndx - && isym->st_value == addr) - return TRUE; - } - - symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) - - symtab_hdr->sh_info); - sym_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; - 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 mn10200_elf_relocate_section. */ - -static bfd_byte * -mn10200_elf_get_relocated_section_contents (output_bfd, link_info, link_order, - data, relocatable, symbols) - 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, (PTR) NULL, - (Elf_Internal_Rela *) 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 = (asection **) 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 (! mn10200_elf_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; -} - -#define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec -#define TARGET_LITTLE_NAME "elf32-mn10200" -#define ELF_ARCH bfd_arch_mn10200 -#define ELF_MACHINE_CODE EM_MN10200 -#define ELF_MACHINE_ALT1 EM_CYGNUS_MN10200 -#define ELF_MAXPAGESIZE 0x1000 - -#define elf_backend_rela_normal 1 -#define elf_info_to_howto mn10200_info_to_howto -#define elf_info_to_howto_rel 0 -#define elf_backend_relocate_section mn10200_elf_relocate_section -#define bfd_elf32_bfd_relax_section mn10200_elf_relax_section -#define bfd_elf32_bfd_get_relocated_section_contents \ - mn10200_elf_get_relocated_section_contents - -#define elf_symbol_leading_char '_' - -#include "elf32-target.h" |