1999-05-03 15:29:11 +08:00
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/* BFD back-end for MS-DOS executables.
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2002-04-05 03:53:38 +08:00
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002
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1999-07-12 18:30:21 +08:00
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Free Software Foundation, Inc.
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1999-05-03 15:29:11 +08:00
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Written by Bryan Ford of the University of Utah.
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Contributed by the Center for Software Science at the
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University of Utah (pa-gdb-bugs@cs.utah.edu).
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "libaout.h"
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#if 0
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struct exe_header
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{
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2001-08-27 18:35:20 +08:00
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unsigned short magic;
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unsigned short bytes_in_last_page;
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unsigned short npages; /* number of 512-byte "pages" including this header */
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unsigned short nrelocs;
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unsigned short header_paras; /* number of 16-byte paragraphs in header */
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unsigned short reserved;
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unsigned short load_switch;
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unsigned short ss_ofs;
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unsigned short sp;
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unsigned short checksum;
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unsigned short ip;
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unsigned short cs_ofs;
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unsigned short reloc_ofs;
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unsigned short reserved2;
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unsigned short something1;
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unsigned short something2;
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unsigned short something3;
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1999-05-03 15:29:11 +08:00
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};
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#endif
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#define EXE_MAGIC 0x5a4d
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#define EXE_LOAD_HIGH 0x0000
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#define EXE_LOAD_LOW 0xffff
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#define EXE_PAGE_SIZE 512
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2001-08-27 18:35:20 +08:00
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static int msdos_sizeof_headers PARAMS ((bfd *, boolean));
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static boolean msdos_write_object_contents PARAMS ((bfd *));
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static boolean msdos_set_section_contents PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
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1999-05-03 15:29:11 +08:00
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static int
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msdos_sizeof_headers (abfd, exec)
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1999-07-12 18:30:21 +08:00
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bfd *abfd ATTRIBUTE_UNUSED;
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boolean exec ATTRIBUTE_UNUSED;
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1999-05-03 15:29:11 +08:00
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{
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return 0;
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}
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static boolean
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msdos_write_object_contents (abfd)
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bfd *abfd;
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{
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static char hdr[EXE_PAGE_SIZE];
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file_ptr outfile_size = sizeof(hdr);
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bfd_vma high_vma = 0;
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asection *sec;
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/* Find the total size of the program on disk and in memory. */
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for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next)
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{
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if (bfd_get_section_size_before_reloc (sec) == 0)
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continue;
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if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
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{
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bfd_vma sec_vma = bfd_get_section_vma (abfd, sec)
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+ bfd_get_section_size_before_reloc (sec);
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if (sec_vma > high_vma)
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high_vma = sec_vma;
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}
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if (bfd_get_section_flags (abfd, sec) & SEC_LOAD)
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{
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file_ptr sec_end = sizeof(hdr)
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+ bfd_get_section_vma (abfd, sec)
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+ bfd_get_section_size_before_reloc (sec);
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if (sec_end > outfile_size)
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outfile_size = sec_end;
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}
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}
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/* Make sure the program isn't too big. */
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if (high_vma > (bfd_vma)0xffff)
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{
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bfd_set_error(bfd_error_file_too_big);
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return false;
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}
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2001-08-27 18:35:20 +08:00
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/* Constants. */
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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H_PUT_16 (abfd, EXE_MAGIC, &hdr[0]);
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H_PUT_16 (abfd, EXE_PAGE_SIZE / 16, &hdr[8]);
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H_PUT_16 (abfd, EXE_LOAD_LOW, &hdr[12]);
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H_PUT_16 (abfd, 0x3e, &hdr[24]);
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H_PUT_16 (abfd, 0x0001, &hdr[28]); /* XXX??? */
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H_PUT_16 (abfd, 0x30fb, &hdr[30]); /* XXX??? */
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H_PUT_16 (abfd, 0x726a, &hdr[32]); /* XXX??? */
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1999-05-03 15:29:11 +08:00
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2001-08-27 18:35:20 +08:00
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/* Bytes in last page (0 = full page). */
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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H_PUT_16 (abfd, outfile_size & (EXE_PAGE_SIZE - 1), &hdr[2]);
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1999-05-03 15:29:11 +08:00
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2001-08-27 18:35:20 +08:00
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/* Number of pages. */
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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H_PUT_16 (abfd, (outfile_size + EXE_PAGE_SIZE - 1) / EXE_PAGE_SIZE, &hdr[4]);
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1999-05-03 15:29:11 +08:00
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/* Set the initial stack pointer to the end of the bss.
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The program's crt0 code must relocate it to a real stack. */
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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H_PUT_16 (abfd, high_vma, &hdr[16]);
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1999-05-03 15:29:11 +08:00
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if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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|| bfd_bwrite (hdr, (bfd_size_type) sizeof(hdr), abfd) != sizeof(hdr))
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1999-05-03 15:29:11 +08:00
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return false;
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return true;
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}
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static boolean
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msdos_set_section_contents (abfd, section, location, offset, count)
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bfd *abfd;
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sec_ptr section;
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PTR location;
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file_ptr offset;
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bfd_size_type count;
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{
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if (count == 0)
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return true;
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section->filepos = EXE_PAGE_SIZE + bfd_get_section_vma (abfd, section);
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if (bfd_get_section_flags (abfd, section) & SEC_LOAD)
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{
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
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|| bfd_bwrite (location, count, abfd) != count)
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1999-05-03 15:29:11 +08:00
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return false;
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}
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return true;
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}
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#define msdos_mkobject aout_32_mkobject
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#define msdos_make_empty_symbol aout_32_make_empty_symbol
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#define msdos_bfd_reloc_type_lookup aout_32_reloc_type_lookup
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#define msdos_close_and_cleanup _bfd_generic_close_and_cleanup
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#define msdos_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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#define msdos_new_section_hook _bfd_generic_new_section_hook
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#define msdos_get_section_contents _bfd_generic_get_section_contents
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#define msdos_get_section_contents_in_window \
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_bfd_generic_get_section_contents_in_window
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#define msdos_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#define msdos_bfd_relax_section bfd_generic_relax_section
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#define msdos_bfd_gc_sections bfd_generic_gc_sections
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* merge.c (struct sec_merge_hash_entry): Add u.entsize and u.suffix
fields, change sec into secinfo.
(struct sec_merge_info): Add chain, remove last fields.
(struct sec_merge_sec_info): Add next, sec, psecinfo fields.
(sec_merge_hash_lookup): If lookup could not use a string only
because it has bad alignment, mark the old string for deletion.
(sec_merge_add): Add secinfo argument. Don't compute entry's
position, instead record the section.
(sec_merge_emit): Update for the sec into secinfo change in
struct sec_merge_hash_entry.
(_bfd_merge_section): Only record the section for merging, defer
putting strings into the hash table.
(cmplengthentry, last4_eq, last_eq, record_section, merge_strings,
_bfd_merge_sections): New functions.
(_bfd_merged_section_offset): Update for the sec_merge_hash_entry
changes.
* libbfd-in.h (_bfd_merge_sections): Add prototype.
(_bfd_nolink_bfd_merge_sections): Define.
* libbfd.h: Likewise.
(bfd_generic_merge_sections): Add prototype.
* targets.c (BFD_JUMP_TABLE_LINK): Add _bfd_merge_sections.
(struct bfd_target): Likewise.
* bfd.c (bfd_merge_sections): Define.
* bfd-in2.h: Rebuilt.
* elf.c (_bfd_elf_merge_sections): New function.
* elf-bfd.h (_bfd_elf_merge_sections): Add prototype.
* elfxx-target.h (bfd_elfNN_bfd_merge_sections): Define.
* reloc.c (bfd_generic_merge_sections): New function.
* vms.c (vms_bfd_merge_sections): New function.
* aout-adobe.c (aout_32_bfd_merge_sections): Define.
* aout-target.h (MY_bfd_merge_sections): Define.
* aout-tic30.c (MY_bfd_merge_sections): Define.
* binary.c (binary_bfd_merge_sections): Define.
* bout.c (b_out_bfd_merge_sections): Define.
* coff-alpha.c (_bfd_ecoff_bfd_merge_sections): Define.
* coffcode.c (coff_bfd_merge_sections): Define.
* coff-mips.c (_bfd_ecoff_bfd_merge_sections): Define.
* i386msdos.c (msdos_bfd_merge_sections): Define.
* i386os9k.c (os9k_bfd_merge_sections): Define.
* ieee.c (ieee_bfd_merge_sections): Define.
* ihex.c (ihex_bfd_merge_sections): Define.
* nlm-target.h (nlm_bfd_merge_sections): Define.
* oasys.c (oasys_bfd_merge_sections): Define.
* ppcboot.c (ppcboot_bfd_merge_sections): Define.
* som.c (som_bfd_merge_sections): Define.
* srec.c (srec_bfd_merge_sections): Define.
* tekhex.c (tekhex_bfd_merge_sections): Define.
* versados.c (versados_bfd_merge_sections): Define.
* xcoff-target.h (_bfd_xcoff_bfd_merge_sections): Define.
* ldlang.c (lang_process): Call bfd_merge_sections.
2001-05-11 20:23:48 +08:00
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#define msdos_bfd_merge_sections bfd_generic_merge_sections
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1999-05-03 15:29:11 +08:00
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#define msdos_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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2002-04-05 03:53:38 +08:00
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#define msdos_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
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1999-05-03 15:29:11 +08:00
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#define msdos_bfd_link_add_symbols _bfd_generic_link_add_symbols
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2002-05-15 08:18:58 +08:00
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#define msdos_bfd_link_just_syms _bfd_generic_link_just_syms
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1999-05-03 15:29:11 +08:00
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#define msdos_bfd_final_link _bfd_generic_final_link
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#define msdos_bfd_link_split_section _bfd_generic_link_split_section
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#define msdos_set_arch_mach _bfd_generic_set_arch_mach
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#define msdos_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
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#define msdos_get_symtab _bfd_nosymbols_get_symtab
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#define msdos_print_symbol _bfd_nosymbols_print_symbol
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#define msdos_get_symbol_info _bfd_nosymbols_get_symbol_info
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#define msdos_find_nearest_line _bfd_nosymbols_find_nearest_line
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#define msdos_get_lineno _bfd_nosymbols_get_lineno
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#define msdos_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
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#define msdos_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define msdos_read_minisymbols _bfd_nosymbols_read_minisymbols
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#define msdos_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
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#define msdos_canonicalize_reloc _bfd_norelocs_canonicalize_reloc
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#define msdos_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
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#define msdos_32_bfd_link_split_section _bfd_generic_link_split_section
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const bfd_target i386msdos_vec =
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{
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2001-08-27 18:35:20 +08:00
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"msdos", /* name */
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bfd_target_msdos_flavour,
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BFD_ENDIAN_LITTLE, /* target byte order */
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BFD_ENDIAN_LITTLE, /* target headers byte order */
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(EXEC_P), /* object flags */
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(SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS
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| SEC_ALLOC | SEC_LOAD), /* section flags */
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0, /* leading underscore */
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' ', /* ar_pad_char */
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16, /* ar_max_namelen */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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{
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_bfd_dummy_target,
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_bfd_dummy_target, /* bfd_check_format */
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_bfd_dummy_target,
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_bfd_dummy_target,
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},
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{
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bfd_false,
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msdos_mkobject,
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_bfd_generic_mkarchive,
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bfd_false,
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},
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{ /* bfd_write_contents */
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bfd_false,
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msdos_write_object_contents,
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_bfd_write_archive_contents,
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bfd_false,
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},
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BFD_JUMP_TABLE_GENERIC (msdos),
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BFD_JUMP_TABLE_COPY (_bfd_generic),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
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BFD_JUMP_TABLE_SYMBOLS (msdos),
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BFD_JUMP_TABLE_RELOCS (msdos),
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BFD_JUMP_TABLE_WRITE (msdos),
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BFD_JUMP_TABLE_LINK (msdos),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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NULL,
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 17:57:26 +08:00
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2001-08-27 18:35:20 +08:00
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(PTR) 0
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};
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1999-05-03 15:29:11 +08:00
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