binutils-gdb/ld/ldbuildid.c

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Add support for generating and inserting build IDs into COFF binaries. * peXXigen.c (pe_print_debugdata): New function: Displays the contents of the debug directory and decodes codeview entries. (_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out) (_bfd_XXi_slurp_codeview_record, _bfd_XXi_write_codeview_record): Add functions for reading and writing debugdir and codeview records. * libpei.h (_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out) (_bfd_XXi_write_codeview_record): Add prototypes and macros. * libcoff-in.h (pe_tdata): Add build-id data. * libcoff.h: Regenerate. * coffcode.h (coff_write_object_contents): Run build_id after_write_object_contents hook. * pe.h (external_IMAGE_DEBUG_DIRECTORY, _CV_INFO_PDB70) (_CV_INFO_PDB20): Add structures and constants for debug directory and codeview records. * internal.h (internal_IMAGE_DEBUG_DIRECTORY, CODEVIEW_INFO): Add structures and constants for internal representation of debug directory and codeview records. * emultempl/elf32.em (id_note_section_size, read_hex, write_build_id): Move code for parsing build-id option and calculating the build-id to... * ldbuildid.c: New file. * ldbuildid.h: New file. * Makefile.am (CFILES, HFILES, OFILES, ld_new_SOURCES): Add new files. * Makefile.in: Regenerate. * ld.texinfo: Update --build-id description to mention COFF support. * NEWS: Mention support for COFF build ids. * emultempl/pe.em (gld${EMULATION_NAME}_handle_option): (pecoff_checksum_contents, write_build_id, setup_build_id) (gld_${EMULATION_NAME}_after_open): Handle and implement build-id option. * emultempl/pep.em: Likewise.
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/* ldbuildid.c - Build Id support routines
Copyright 2013, 2014 Free Software Foundation, Inc.
This file is part of the GNU Binutils.
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 "safe-ctype.h"
#include "md5.h"
#include "sha1.h"
#include "ldbuildid.h"
#define streq(a,b) strcmp ((a), (b)) == 0
#define strneq(a,b,n) strncmp ((a), (b), (n)) == 0
bfd_boolean
validate_build_id_style (const char *style)
{
if ((streq (style, "md5")) || (streq (style, "sha1"))
#ifndef __MINGW32__
|| (streq (style, "uuid"))
#endif
|| (strneq (style, "0x", 2)))
return TRUE;
return FALSE;
}
bfd_size_type
compute_build_id_size (const char *style)
{
if (streq (style, "md5") || streq (style, "uuid"))
return 128 / 8;
if (streq (style, "sha1"))
return 160 / 8;
if (strneq (style, "0x", 2))
{
bfd_size_type size = 0;
/* ID is in string form (hex). Count the bytes. */
const char *id = style + 2;
do
{
if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
{
++size;
id += 2;
}
else if (*id == '-' || *id == ':')
++id;
else
{
size = 0;
break;
}
} while (*id != '\0');
return size;
}
return 0;
}
static unsigned char
read_hex (const char xdigit)
{
if (ISDIGIT (xdigit))
return xdigit - '0';
if (ISUPPER (xdigit))
return xdigit - 'A' + 0xa;
if (ISLOWER (xdigit))
return xdigit - 'a' + 0xa;
abort ();
return 0;
}
bfd_boolean
generate_build_id (bfd *abfd,
const char *style,
checksum_fn checksum_contents,
unsigned char *id_bits,
int size ATTRIBUTE_UNUSED)
Add support for generating and inserting build IDs into COFF binaries. * peXXigen.c (pe_print_debugdata): New function: Displays the contents of the debug directory and decodes codeview entries. (_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out) (_bfd_XXi_slurp_codeview_record, _bfd_XXi_write_codeview_record): Add functions for reading and writing debugdir and codeview records. * libpei.h (_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out) (_bfd_XXi_write_codeview_record): Add prototypes and macros. * libcoff-in.h (pe_tdata): Add build-id data. * libcoff.h: Regenerate. * coffcode.h (coff_write_object_contents): Run build_id after_write_object_contents hook. * pe.h (external_IMAGE_DEBUG_DIRECTORY, _CV_INFO_PDB70) (_CV_INFO_PDB20): Add structures and constants for debug directory and codeview records. * internal.h (internal_IMAGE_DEBUG_DIRECTORY, CODEVIEW_INFO): Add structures and constants for internal representation of debug directory and codeview records. * emultempl/elf32.em (id_note_section_size, read_hex, write_build_id): Move code for parsing build-id option and calculating the build-id to... * ldbuildid.c: New file. * ldbuildid.h: New file. * Makefile.am (CFILES, HFILES, OFILES, ld_new_SOURCES): Add new files. * Makefile.in: Regenerate. * ld.texinfo: Update --build-id description to mention COFF support. * NEWS: Mention support for COFF build ids. * emultempl/pe.em (gld${EMULATION_NAME}_handle_option): (pecoff_checksum_contents, write_build_id, setup_build_id) (gld_${EMULATION_NAME}_after_open): Handle and implement build-id option. * emultempl/pep.em: Likewise.
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{
if (streq (style, "md5"))
{
struct md5_ctx ctx;
md5_init_ctx (&ctx);
if (!(*checksum_contents) (abfd, (sum_fn) &md5_process_bytes, &ctx))
return FALSE;
md5_finish_ctx (&ctx, id_bits);
}
else if (streq (style, "sha1"))
{
struct sha1_ctx ctx;
sha1_init_ctx (&ctx);
if (!(*checksum_contents) (abfd, (sum_fn) &sha1_process_bytes, &ctx))
return FALSE;
sha1_finish_ctx (&ctx, id_bits);
}
#ifndef __MINGW32__
else if (streq (style, "uuid"))
{
int n;
int fd = open ("/dev/urandom", O_RDONLY);
if (fd < 0)
return FALSE;
n = read (fd, id_bits, size);
close (fd);
if (n < size)
return FALSE;
}
#endif
else if (strneq (style, "0x", 2))
{
/* ID is in string form (hex). Convert to bits. */
const char *id = style + 2;
size_t n = 0;
do
{
if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
{
id_bits[n] = read_hex (*id++) << 4;
id_bits[n++] |= read_hex (*id++);
}
else if (*id == '-' || *id == ':')
++id;
else
abort (); /* Should have been validated earlier. */
} while (*id != '\0');
}
else
abort (); /* Should have been validated earlier. */
return TRUE;
}