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- /* BFD back-end for Intel 386 COFF files (DJGPP variant).
- Copyright (C) 1990-2022 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 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_GO32
- #define COFF_LONG_SECTION_NAMES
- #define COFF_SUPPORT_GNU_LINKONCE
- #define COFF_LONG_FILENAMES
- #define COFF_SECTION_ALIGNMENT_ENTRIES \
- { COFF_SECTION_NAME_PARTIAL_MATCH (".data"), \
- COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
- { COFF_SECTION_NAME_PARTIAL_MATCH (".text"), \
- COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
- { COFF_SECTION_NAME_PARTIAL_MATCH (".const"), \
- COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
- { COFF_SECTION_NAME_PARTIAL_MATCH (".rodata"), \
- COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
- { COFF_SECTION_NAME_PARTIAL_MATCH (".bss"), \
- 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 (".gnu.linkonce.b"), \
- 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 }
- /* Section contains extended relocations. */
- #define IMAGE_SCN_LNK_NRELOC_OVFL (0x01000000)
- #include "sysdep.h"
- #include "bfd.h"
- /* The following functions are not static, because they are also
- used for coff-go32-exe (coff-stgo32.c). */
- bool _bfd_go32_mkobject (bfd *);
- void _bfd_go32_swap_scnhdr_in (bfd *, void *, void *);
- unsigned int _bfd_go32_swap_scnhdr_out (bfd *, void *, void *);
- #define coff_mkobject _bfd_go32_mkobject
- #define coff_SWAP_scnhdr_in _bfd_go32_swap_scnhdr_in
- #define coff_SWAP_scnhdr_out _bfd_go32_swap_scnhdr_out
- #include "coff-i386.c"
- bool
- _bfd_go32_mkobject (bfd * abfd)
- {
- const bfd_size_type amt = sizeof (coff_data_type);
- abfd->tdata.coff_obj_data = bfd_zalloc (abfd, amt);
- if (abfd->tdata.coff_obj_data == NULL)
- return false;
- coff_data (abfd)->go32 = true;
- return true;
- }
- void
- _bfd_go32_swap_scnhdr_in (bfd * abfd, void * ext, void * in)
- {
- SCNHDR *scnhdr_ext = (SCNHDR *) ext;
- struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
- memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name));
- scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr);
- scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr);
- scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size);
- scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr);
- scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr);
- scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr);
- scnhdr_int->s_flags = GET_SCNHDR_FLAGS (abfd, scnhdr_ext->s_flags);
- scnhdr_int->s_nreloc = GET_SCNHDR_NRELOC (abfd, scnhdr_ext->s_nreloc);
- scnhdr_int->s_nlnno = GET_SCNHDR_NLNNO (abfd, scnhdr_ext->s_nlnno);
- /* DJGPP follows the same strategy as PE COFF.
- Iff the file is an executable then the higher 16 bits
- of the line number have been stored in the relocation
- counter field. */
- if (abfd->flags & EXEC_P && (strcmp (scnhdr_ext->s_name, ".text") == 0))
- {
- scnhdr_int->s_nlnno
- = (GET_SCNHDR_NRELOC (abfd, scnhdr_ext->s_nreloc) << 16)
- + GET_SCNHDR_NLNNO (abfd, scnhdr_ext->s_nlnno);
- scnhdr_int->s_nreloc = 0;
- }
- }
- unsigned int
- _bfd_go32_swap_scnhdr_out (bfd * abfd, void * in, void * out)
- {
- struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
- SCNHDR *scnhdr_ext = (SCNHDR *) out;
- unsigned int ret = bfd_coff_scnhsz (abfd);
- memcpy (scnhdr_ext->s_name, scnhdr_int->s_name, sizeof (scnhdr_int->s_name));
- PUT_SCNHDR_VADDR (abfd, scnhdr_int->s_vaddr, scnhdr_ext->s_vaddr);
- PUT_SCNHDR_PADDR (abfd, scnhdr_int->s_paddr, scnhdr_ext->s_paddr);
- PUT_SCNHDR_SIZE (abfd, scnhdr_int->s_size, scnhdr_ext->s_size);
- PUT_SCNHDR_SCNPTR (abfd, scnhdr_int->s_scnptr, scnhdr_ext->s_scnptr);
- PUT_SCNHDR_RELPTR (abfd, scnhdr_int->s_relptr, scnhdr_ext->s_relptr);
- PUT_SCNHDR_LNNOPTR (abfd, scnhdr_int->s_lnnoptr, scnhdr_ext->s_lnnoptr);
- PUT_SCNHDR_FLAGS (abfd, scnhdr_int->s_flags, scnhdr_ext->s_flags);
- if (abfd->flags & EXEC_P && (strcmp (scnhdr_int->s_name, ".text") == 0))
- {
- /* DJGPP follows the same strategy as PE COFF.
- By inference from looking at MS output, the 32 bit field
- which is the combination of the number_of_relocs and
- number_of_linenos is used for the line number count in
- executables. A 16-bit field won't do for cc1. The MS
- document says that the number of relocs is zero for
- executables, but the 17-th bit has been observed to be there.
- Overflow is not an issue: a 4G-line program will overflow a
- bunch of other fields long before this! */
- PUT_SCNHDR_NLNNO (abfd, (scnhdr_int->s_nlnno & 0xffff),
- scnhdr_ext->s_nlnno);
- PUT_SCNHDR_NRELOC (abfd, (scnhdr_int->s_nlnno >> 16),
- scnhdr_ext->s_nreloc);
- }
- else
- {
- /* DJGPP follows the same strategy as PE COFF. */
- if (scnhdr_int->s_nlnno <= MAX_SCNHDR_NLNNO)
- PUT_SCNHDR_NLNNO (abfd, scnhdr_int->s_nlnno, scnhdr_ext->s_nlnno);
- else
- {
- char buf[sizeof (scnhdr_int->s_name) + 1];
- memcpy (buf, scnhdr_int->s_name, sizeof (scnhdr_int->s_name));
- buf[sizeof (scnhdr_int->s_name)] = '\0';
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: %s: line number overflow: 0x%lx > 0xffff"),
- abfd, buf, scnhdr_int->s_nlnno);
- bfd_set_error (bfd_error_file_truncated);
- PUT_SCNHDR_NLNNO (abfd, 0xffff, scnhdr_ext->s_nlnno);
- ret = 0;
- }
- /* Although we could encode 0xffff relocs here, we do not, to be
- consistent with other parts of bfd. Also it lets us warn, as
- we should never see 0xffff here w/o having the overflow flag
- set. */
- if (scnhdr_int->s_nreloc < MAX_SCNHDR_NRELOC)
- PUT_SCNHDR_NRELOC (abfd, scnhdr_int->s_nreloc, scnhdr_ext->s_nreloc);
- else
- {
- /* DJGPP can deal with large #s of relocs, but not here. */
- PUT_SCNHDR_NRELOC (abfd, 0xffff, scnhdr_ext->s_nreloc);
- scnhdr_int->s_flags |= IMAGE_SCN_LNK_NRELOC_OVFL;
- PUT_SCNHDR_FLAGS (abfd, scnhdr_int->s_flags, scnhdr_ext->s_flags);
- }
- }
- return ret;
- }
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