-/* 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 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 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.
+ 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. */
+ 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 go32coff_vec
+#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_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 }
+
+/* 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). */
+bfd_boolean _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"
+
+bfd_boolean
+_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;
+}
projects / deliverable / binutils-gdb.git / blobdiff