diff options
Diffstat (limited to 'binutils-2.24/bfd/coff-i386.c')
| -rw-r--r-- | binutils-2.24/bfd/coff-i386.c | 681 |
1 files changed, 0 insertions, 681 deletions
diff --git a/binutils-2.24/bfd/coff-i386.c b/binutils-2.24/bfd/coff-i386.c deleted file mode 100644 index af92b40c..00000000 --- a/binutils-2.24/bfd/coff-i386.c +++ /dev/null @@ -1,681 +0,0 @@ -/* BFD back-end for Intel 386 COFF files. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012 - Free Software Foundation, Inc. - Written by Cygnus Support. - - This file is part of BFD, the Binary File Descriptor library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, - MA 02110-1301, USA. */ - -#include "sysdep.h" -#include "bfd.h" -#include "libbfd.h" - -#include "coff/i386.h" - -#include "coff/internal.h" - -#ifdef COFF_WITH_PE -#include "coff/pe.h" -#endif - -#ifdef COFF_GO32_EXE -#include "coff/go32exe.h" -#endif - -#ifndef bfd_pe_print_pdata -#define bfd_pe_print_pdata NULL -#endif - -#include "libcoff.h" - -static reloc_howto_type *coff_i386_rtype_to_howto - (bfd *, asection *, struct internal_reloc *, - struct coff_link_hash_entry *, struct internal_syment *, - bfd_vma *); -static reloc_howto_type *coff_i386_reloc_type_lookup - (bfd *, bfd_reloc_code_real_type); - -#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) -/* The page size is a guess based on ELF. */ - -#define COFF_PAGE_SIZE 0x1000 - -/* For some reason when using i386 COFF the value stored in the .text - section for a reference to a common symbol is the value itself plus - any desired offset. Ian Taylor, Cygnus Support. */ - -/* If we are producing relocatable output, we need to do some - adjustments to the object file that are not done by the - bfd_perform_relocation function. This function is called by every - reloc type to make any required adjustments. */ - -static bfd_reloc_status_type -coff_i386_reloc (bfd *abfd, - arelent *reloc_entry, - asymbol *symbol, - void * data, - asection *input_section ATTRIBUTE_UNUSED, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - symvalue diff; - -#ifndef COFF_WITH_PE - if (output_bfd == (bfd *) NULL) - return bfd_reloc_continue; -#endif - - if (bfd_is_com_section (symbol->section)) - { -#ifndef COFF_WITH_PE - /* We are relocating a common symbol. The current value in the - object file is ORIG + OFFSET, where ORIG is the value of the - common symbol as seen by the object file when it was compiled - (this may be zero if the symbol was undefined) and OFFSET is - the offset into the common symbol (normally zero, but may be - non-zero when referring to a field in a common structure). - ORIG is the negative of reloc_entry->addend, which is set by - the CALC_ADDEND macro below. We want to replace the value in - the object file with NEW + OFFSET, where NEW is the value of - the common symbol which we are going to put in the final - object file. NEW is symbol->value. */ - diff = symbol->value + reloc_entry->addend; -#else - /* In PE mode, we do not offset the common symbol. */ - diff = reloc_entry->addend; -#endif - } - else - { - /* For some reason bfd_perform_relocation always effectively - ignores the addend for a COFF target when producing - relocatable output. This seems to be always wrong for 386 - COFF, so we handle the addend here instead. */ -#ifdef COFF_WITH_PE - if (output_bfd == (bfd *) NULL) - { - reloc_howto_type *howto = reloc_entry->howto; - - /* Although PC relative relocations are very similar between - PE and non-PE formats, but they are off by 1 << howto->size - bytes. For the external relocation, PE is very different - from others. See md_apply_fix3 () in gas/config/tc-i386.c. - When we link PE and non-PE object files together to - generate a non-PE executable, we have to compensate it - here. */ - if (howto->pc_relative && howto->pcrel_offset) - diff = -(1 << howto->size); - else if (symbol->flags & BSF_WEAK) - diff = reloc_entry->addend - symbol->value; - else - diff = -reloc_entry->addend; - } - else -#endif - diff = reloc_entry->addend; - } - -#ifdef COFF_WITH_PE - /* FIXME: How should this case be handled? */ - if (reloc_entry->howto->type == R_IMAGEBASE - && output_bfd != NULL - && bfd_get_flavour(output_bfd) == bfd_target_coff_flavour) - diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; -#endif - -#define DOIT(x) \ - x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) - - if (diff != 0) - { - reloc_howto_type *howto = reloc_entry->howto; - unsigned char *addr = (unsigned char *) data + reloc_entry->address; - - switch (howto->size) - { - case 0: - { - char x = bfd_get_8 (abfd, addr); - DOIT (x); - bfd_put_8 (abfd, x, addr); - } - break; - - case 1: - { - short x = bfd_get_16 (abfd, addr); - DOIT (x); - bfd_put_16 (abfd, (bfd_vma) x, addr); - } - break; - - case 2: - { - long x = bfd_get_32 (abfd, addr); - DOIT (x); - bfd_put_32 (abfd, (bfd_vma) x, addr); - } - break; - - default: - abort (); - } - } - - /* Now let bfd_perform_relocation finish everything up. */ - return bfd_reloc_continue; -} - -#ifdef COFF_WITH_PE -/* Return TRUE if this relocation should appear in the output .reloc - section. */ - -static bfd_boolean in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, - reloc_howto_type *howto) -{ - return ! howto->pc_relative && howto->type != R_IMAGEBASE - && howto->type != R_SECREL32; -} -#endif /* COFF_WITH_PE */ - -#ifndef PCRELOFFSET -#define PCRELOFFSET FALSE -#endif - -static reloc_howto_type howto_table[] = -{ - EMPTY_HOWTO (0), - EMPTY_HOWTO (1), - EMPTY_HOWTO (2), - EMPTY_HOWTO (3), - EMPTY_HOWTO (4), - EMPTY_HOWTO (5), - HOWTO (R_DIR32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "dir32", /* name */ - TRUE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - /* PE IMAGE_REL_I386_DIR32NB relocation (7). */ - HOWTO (R_IMAGEBASE, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "rva32", /* name */ - TRUE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - EMPTY_HOWTO (010), - EMPTY_HOWTO (011), - EMPTY_HOWTO (012), -#ifdef COFF_WITH_PE - /* 32-bit longword section relative relocation (013). */ - HOWTO (R_SECREL32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "secrel32", /* name */ - TRUE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE), /* pcrel_offset */ -#else - EMPTY_HOWTO (013), -#endif - EMPTY_HOWTO (014), - EMPTY_HOWTO (015), - EMPTY_HOWTO (016), - /* Byte relocation (017). */ - HOWTO (R_RELBYTE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "8", /* name */ - TRUE, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - PCRELOFFSET), /* pcrel_offset */ - /* 16-bit word relocation (020). */ - HOWTO (R_RELWORD, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "16", /* name */ - TRUE, /* partial_inplace */ - 0x0000ffff, /* src_mask */ - 0x0000ffff, /* dst_mask */ - PCRELOFFSET), /* pcrel_offset */ - /* 32-bit longword relocation (021). */ - HOWTO (R_RELLONG, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "32", /* name */ - TRUE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - PCRELOFFSET), /* pcrel_offset */ - /* Byte PC relative relocation (022). */ - HOWTO (R_PCRBYTE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "DISP8", /* name */ - TRUE, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - PCRELOFFSET), /* pcrel_offset */ - /* 16-bit word PC relative relocation (023). */ - HOWTO (R_PCRWORD, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "DISP16", /* name */ - TRUE, /* partial_inplace */ - 0x0000ffff, /* src_mask */ - 0x0000ffff, /* dst_mask */ - PCRELOFFSET), /* pcrel_offset */ - /* 32-bit longword PC relative relocation (024). */ - HOWTO (R_PCRLONG, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - coff_i386_reloc, /* special_function */ - "DISP32", /* name */ - TRUE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - PCRELOFFSET) /* pcrel_offset */ -}; - -/* Turn a howto into a reloc nunmber */ - -#define SELECT_RELOC(x,howto) { x.r_type = howto->type; } -#define BADMAG(x) I386BADMAG(x) -#define I386 1 /* Customize coffcode.h */ - -#define RTYPE2HOWTO(cache_ptr, dst) \ - ((cache_ptr)->howto = \ - ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \ - ? howto_table + (dst)->r_type \ - : NULL)) - -/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared - library. On some other COFF targets STYP_BSS is normally - STYP_NOLOAD. */ -#define BSS_NOLOAD_IS_SHARED_LIBRARY - -/* Compute the addend of a reloc. If the reloc is to a common symbol, - the object file contains the value of the common symbol. By the - time this is called, the linker may be using a different symbol - from a different object file with a different value. Therefore, we - hack wildly to locate the original symbol from this file so that we - can make the correct adjustment. This macro sets coffsym to the - symbol from the original file, and uses it to set the addend value - correctly. If this is not a common symbol, the usual addend - calculation is done, except that an additional tweak is needed for - PC relative relocs. - FIXME: This macro refers to symbols and asect; these are from the - calling function, not the macro arguments. */ - -#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ - { \ - coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ - if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ - coffsym = (obj_symbols (abfd) \ - + (cache_ptr->sym_ptr_ptr - symbols)); \ - else if (ptr) \ - coffsym = coff_symbol_from (abfd, ptr); \ - if (coffsym != (coff_symbol_type *) NULL \ - && coffsym->native->u.syment.n_scnum == 0) \ - cache_ptr->addend = - coffsym->native->u.syment.n_value; \ - else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ - && ptr->section != (asection *) NULL) \ - cache_ptr->addend = - (ptr->section->vma + ptr->value); \ - else \ - cache_ptr->addend = 0; \ - if (ptr && howto_table[reloc.r_type].pc_relative) \ - cache_ptr->addend += asect->vma; \ - } - -/* We use the special COFF backend linker. For normal i386 COFF, we - can use the generic relocate_section routine. For PE, we need our - own routine. */ - -#ifndef COFF_WITH_PE - -#define coff_relocate_section _bfd_coff_generic_relocate_section - -#else /* COFF_WITH_PE */ - -/* The PE relocate section routine. The only difference between this - and the regular routine is that we don't want to do anything for a - relocatable link. */ - -static bfd_boolean -coff_pe_i386_relocate_section (bfd *output_bfd, - struct bfd_link_info *info, - bfd *input_bfd, - asection *input_section, - bfd_byte *contents, - struct internal_reloc *relocs, - struct internal_syment *syms, - asection **sections) -{ - if (info->relocatable) - return TRUE; - - return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, - input_section, contents, - relocs, syms, sections); -} - -#define coff_relocate_section coff_pe_i386_relocate_section - -#endif /* COFF_WITH_PE */ - -/* Convert an rtype to howto for the COFF backend linker. */ - -static reloc_howto_type * -coff_i386_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, - asection *sec, - struct internal_reloc *rel, - struct coff_link_hash_entry *h, - struct internal_syment *sym, - bfd_vma *addendp) -{ - reloc_howto_type *howto; - - if (rel->r_type >= sizeof (howto_table) / sizeof (howto_table[0])) - { - bfd_set_error (bfd_error_bad_value); - return NULL; - } - - howto = howto_table + rel->r_type; - -#ifdef COFF_WITH_PE - /* Cancel out code in _bfd_coff_generic_relocate_section. */ - *addendp = 0; -#endif - - if (howto->pc_relative) - *addendp += sec->vma; - - if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) - { - /* This is a common symbol. The section contents include the - size (sym->n_value) as an addend. The relocate_section - function will be adding in the final value of the symbol. We - need to subtract out the current size in order to get the - correct result. */ - - BFD_ASSERT (h != NULL); - -#ifndef COFF_WITH_PE - /* I think we *do* want to bypass this. If we don't, I have - seen some data parameters get the wrong relocation address. - If I link two versions with and without this section bypassed - and then do a binary comparison, the addresses which are - different can be looked up in the map. The case in which - this section has been bypassed has addresses which correspond - to values I can find in the map. */ - *addendp -= sym->n_value; -#endif - } - -#ifndef COFF_WITH_PE - /* If the output symbol is common (in which case this must be a - relocatable link), we need to add in the final size of the - common symbol. */ - if (h != NULL && h->root.type == bfd_link_hash_common) - *addendp += h->root.u.c.size; -#endif - -#ifdef COFF_WITH_PE - if (howto->pc_relative) - { - *addendp -= 4; - - /* If the symbol is defined, then the generic code is going to - add back the symbol value in order to cancel out an - adjustment it made to the addend. However, we set the addend - to 0 at the start of this function. We need to adjust here, - to avoid the adjustment the generic code will make. FIXME: - This is getting a bit hackish. */ - if (sym != NULL && sym->n_scnum != 0) - *addendp -= sym->n_value; - } - - if (rel->r_type == R_IMAGEBASE - && (bfd_get_flavour(sec->output_section->owner) - == bfd_target_coff_flavour)) - { - *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; - } - - BFD_ASSERT (sym != NULL); - if (rel->r_type == R_SECREL32 && sym != NULL) - { - bfd_vma osect_vma; - - if (h && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - osect_vma = h->root.u.def.section->output_section->vma; - else - { - asection *s; - int i; - - /* Sigh, the only way to get the section to offset against - is to find it the hard way. */ - - for (s = abfd->sections, i = 1; i < sym->n_scnum; i++) - s = s->next; - - osect_vma = s->output_section->vma; - } - - *addendp -= osect_vma; - } -#endif - - return howto; -} - -#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup -#define coff_bfd_reloc_name_lookup coff_i386_reloc_name_lookup - -static reloc_howto_type * -coff_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - switch (code) - { - case BFD_RELOC_RVA: - return howto_table + R_IMAGEBASE; - case BFD_RELOC_32: - return howto_table + R_DIR32; - case BFD_RELOC_32_PCREL: - return howto_table + R_PCRLONG; - case BFD_RELOC_16: - return howto_table + R_RELWORD; - case BFD_RELOC_16_PCREL: - return howto_table + R_PCRWORD; - case BFD_RELOC_8: - return howto_table + R_RELBYTE; - case BFD_RELOC_8_PCREL: - return howto_table + R_PCRBYTE; -#ifdef COFF_WITH_PE - case BFD_RELOC_32_SECREL: - return howto_table + R_SECREL32; -#endif - default: - BFD_FAIL (); - return 0; - } -} - -static reloc_howto_type * -coff_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, - const char *r_name) -{ - unsigned int i; - - for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) - if (howto_table[i].name != NULL - && strcasecmp (howto_table[i].name, r_name) == 0) - return &howto_table[i]; - - return NULL; -} - -#define coff_rtype_to_howto coff_i386_rtype_to_howto - -#ifdef TARGET_UNDERSCORE - -/* If i386 gcc uses underscores for symbol names, then it does not use - a leading dot for local labels, so if TARGET_UNDERSCORE is defined - we treat all symbols starting with L as local. */ - -static bfd_boolean -coff_i386_is_local_label_name (bfd *abfd, const char *name) -{ - if (name[0] == 'L') - return TRUE; - - return _bfd_coff_is_local_label_name (abfd, name); -} - -#define coff_bfd_is_local_label_name coff_i386_is_local_label_name - -#endif /* TARGET_UNDERSCORE */ - -#include "coffcode.h" - -#define _bfd_generic_find_nearest_line_discriminator \ - coff_find_nearest_line_discriminator - -const bfd_target -#ifdef TARGET_SYM - TARGET_SYM = -#else - i386coff_vec = -#endif -{ -#ifdef TARGET_NAME - TARGET_NAME, -#else - "coff-i386", /* name */ -#endif - bfd_target_coff_flavour, - BFD_ENDIAN_LITTLE, /* data byte order is little */ - BFD_ENDIAN_LITTLE, /* header byte order is little */ - - (HAS_RELOC | EXEC_P | /* object flags */ - HAS_LINENO | HAS_DEBUG | - HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS ), - - (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ -#ifdef COFF_WITH_PE - | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING -#endif - | SEC_CODE | SEC_DATA | SEC_EXCLUDE ), - -#ifdef TARGET_UNDERSCORE - TARGET_UNDERSCORE, /* leading underscore */ -#else - 0, /* leading underscore */ -#endif - '/', /* ar_pad_char */ - 15, /* ar_max_namelen */ - 0, /* match priority. */ - - bfd_getl64, bfd_getl_signed_64, bfd_putl64, - bfd_getl32, bfd_getl_signed_32, bfd_putl32, - bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ - bfd_getl64, bfd_getl_signed_64, bfd_putl64, - bfd_getl32, bfd_getl_signed_32, bfd_putl32, - bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ - -/* Note that we allow an object file to be treated as a core file as well. */ - /* bfd_check_format */ -#ifdef COFF_CHECK_FORMAT - {_bfd_dummy_target, COFF_CHECK_FORMAT, - bfd_generic_archive_p, COFF_CHECK_FORMAT}, -#else - {_bfd_dummy_target, coff_object_p, bfd_generic_archive_p, coff_object_p}, -#endif - {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ - bfd_false}, - {bfd_false, coff_write_object_contents, /* bfd_write_contents */ - _bfd_write_archive_contents, bfd_false}, - - BFD_JUMP_TABLE_GENERIC (coff), - BFD_JUMP_TABLE_COPY (coff), - BFD_JUMP_TABLE_CORE (_bfd_nocore), - BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), - BFD_JUMP_TABLE_SYMBOLS (coff), - BFD_JUMP_TABLE_RELOCS (coff), - BFD_JUMP_TABLE_WRITE (coff), - BFD_JUMP_TABLE_LINK (coff), - BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), - - NULL, - - COFF_SWAP_TABLE -}; |