X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Fcoff-go32.c;h=e43d5cee3da60361954e0b1a20845783045d1eac;hb=f3f8ece4b1c77c925d1f1566df0bf632790a4d24;hp=a26f8f32e88aea017d0631675d06fc1f86814f4e;hpb=e98fe4f7b54cbdf29aef9287bbb1bea8801dd05a;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/coff-go32.c b/bfd/coff-go32.c index a26f8f32e8..e43d5cee3d 100644 --- a/bfd/coff-go32.c +++ b/bfd/coff-go32.c @@ -1,358 +1,45 @@ -/* BFD back-end for Intel 386 COFF files (go32 variant). - Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. +/* BFD back-end for Intel 386 COFF files (DJGPP variant). + Copyright (C) 1990-2020 Free Software Foundation, Inc. Written by DJ Delorie. -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., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" -#include "obstack.h" -#include "coff/i386.h" -#include "coff/internal.h" -#include "libcoff.h" - -static bfd_reloc_status_type coff_go32_reloc PARAMS ((bfd *abfd, - arelent *reloc_entry, - asymbol *symbol, - PTR data, - asection *input_section, - bfd *output_bfd, - char **error_message)); - -/* 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 relocateable 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_go32_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, - error_message) - bfd *abfd; - arelent *reloc_entry; - asymbol *symbol; - PTR data; - asection *input_section; - bfd *output_bfd; - char **error_message; -{ - symvalue diff; - - if (output_bfd == (bfd *) NULL) - return bfd_reloc_continue; - - if (bfd_is_com_section (symbol->section)) - { - /* 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 - { - /* For some reason bfd_perform_relocation always effectively - ignores the addend for a COFF target when producing - relocateable output. This seems to be always wrong for 386 - COFF, so we handle the addend here instead. */ - diff = reloc_entry->addend; - } - -#define DOIT(x) \ - x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) - - if (diff != 0) - { - const 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, x, addr); - } - break; - - case 2: - { - long x = bfd_get_32 (abfd, addr); - DOIT (x); - bfd_put_32 (abfd, x, addr); - } - break; - - default: - abort (); - } - } - - /* Now let bfd_perform_relocation finish everything up. */ - return bfd_reloc_continue; -} - -static reloc_howto_type howto_table[] = -{ - {0}, - {1}, - {2}, - {3}, - {4}, - {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_go32_reloc, /* special_function */ - "dir32", /* name */ - true, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - false), /* pcrel_offset */ - {7}, - {010}, - {011}, - {012}, - {013}, - {014}, - {015}, - {016}, - 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_go32_reloc, /* special_function */ - "8", /* name */ - true, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - false), /* pcrel_offset */ - 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_go32_reloc, /* special_function */ - "16", /* name */ - true, /* partial_inplace */ - 0x0000ffff, /* src_mask */ - 0x0000ffff, /* dst_mask */ - false), /* pcrel_offset */ - 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_go32_reloc, /* special_function */ - "32", /* name */ - true, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - false), /* pcrel_offset */ - 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_go32_reloc, /* special_function */ - "DISP8", /* name */ - true, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - false), /* pcrel_offset */ - 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_go32_reloc, /* special_function */ - "DISP16", /* name */ - true, /* partial_inplace */ - 0x0000ffff, /* src_mask */ - 0x0000ffff, /* dst_mask */ - false), /* pcrel_offset */ - 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_go32_reloc, /* special_function */ - "DISP32", /* name */ - true, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - false) /* 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 = howto_table + (dst)->r_type; - -/* On SCO Unix 3.2.2 the native assembler generates two .data - sections. We handle that by renaming the second one to .data2. It - does no harm to do this for any 386 COFF target. */ -#define TWO_DATA_SECS - -/* 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; \ - } - -#include "coffcode.h" - -static const bfd_target * -go32coff_object_p(a) - bfd *a; -{ - return coff_object_p(a); -} - -static const bfd_target * -go32coff_archive_p(a) - bfd *a; -{ - return 0; -} - -const bfd_target -#ifdef TARGET_SYM - TARGET_SYM = -#else - go32coff_vec = -#endif -{ -#ifdef TARGET_NAME - TARGET_NAME, -#else - "coff-go32", /* name */ -#endif - bfd_target_coff_flavour, - false, /* data byte order is little */ - false, /* header byte order is little */ - - (HAS_RELOC | EXEC_P | /* object flags */ - HAS_LINENO | HAS_DEBUG | - HAS_SYMS | HAS_LOCALS | WP_TEXT), - - (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ - '_', /* leading underscore */ - '/', /* ar_pad_char */ - 15, /* ar_max_namelen */ - - 2, /* minimum alignment power */ - 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_dummy_target, go32coff_object_p, /* bfd_check_format */ - bfd_generic_archive_p, go32coff_object_p}, - {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), - - COFF_SWAP_TABLE, -}; + 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. */ + +#define TARGET_SYM i386_coff_go32_vec +#define TARGET_NAME "coff-go32" +#define TARGET_UNDERSCORE '_' +#define COFF_LONG_SECTION_NAMES +#define COFF_SUPPORT_GNU_LINKONCE +#define COFF_LONG_FILENAMES + +#define COFF_SECTION_ALIGNMENT_ENTRIES \ +{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ +{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ +{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.d"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ +{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.t"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ +{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.r"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ +{ COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \ +{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi"), \ + COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 } + +#include "coff-i386.c"