diff options
Diffstat (limited to 'bfd/elf-m10200.c')
| -rw-r--r-- | bfd/elf-m10200.c | 1525 |
1 files changed, 0 insertions, 1525 deletions
diff --git a/bfd/elf-m10200.c b/bfd/elf-m10200.c deleted file mode 100644 index 53d193d8704..00000000000 --- a/bfd/elf-m10200.c +++ /dev/null @@ -1,1525 +0,0 @@ -/* Matsushita 10200 specific support for 32-bit ELF - Copyright (C) 1996, 1997, 1998 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 *, Elf32_Internal_Rela *)); -static boolean mn10200_elf_relax_delete_bytes - PARAMS ((bfd *, asection *, bfd_vma, int)); -static boolean mn10200_elf_symbol_address_p - PARAMS ((bfd *, asection *, Elf32_External_Sym *, bfd_vma)); - -/* We have to use RELA instructions since md_apply_fix3 in the assembler - does absolutely nothing. */ -#define USE_RELA - -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; - 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; - arelent *cache_ptr; - Elf32_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; - asection *input_section; - bfd_byte *contents; - bfd_vma offset; - bfd_vma value; - bfd_vma addend; - struct bfd_link_info *info; - asection *sym_sec; - int is_local; -{ - 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 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; - - 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; - - 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; - } - - /* This is a final link. */ - h = NULL; - sym = NULL; - sec = NULL; - if (r_symndx < symtab_hdr->sh_info) - { - 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; - } - } - - 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, 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))) - 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's quite a few relaxing opportunites 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 boolean -mn10200_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; - 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; - - /* 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; - - /* 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. */ - 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. */ - - - /* 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; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* 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; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* 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->_cooked_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, extsyms, - irel->r_offset + 1)) - continue; - - /* 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; - - /* 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 reldection 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; - - /* 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 reldection 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 ((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 reldection 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; - - /* 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; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - 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 (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 -mn10200_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; - - 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 -mn10200_elf_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 mn10200_elf_relocate_section. */ - -static bfd_byte * -mn10200_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 (! mn10200_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; -} - - -#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_CYGNUS_MN10200 -#define ELF_MAXPAGESIZE 0x1000 - -#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" |