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authorJon TURNEY <jon.turney@dronecode.org.uk>2014-04-08 10:59:43 +0100
committerNick Clifton <nickc@redhat.com>2014-04-08 10:59:43 +0100
commit61e2488cd8497d158303a78563ad40f51f5c3f8e (patch)
tree096a515807bb59268398b4dd879929e93f78fec3 /ld/ldbuildid.c
parentae1d276159c3cfb29caacdf567aea01f433f78b0 (diff)
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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.
Diffstat (limited to 'ld/ldbuildid.c')
-rw-r--r--ld/ldbuildid.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/ld/ldbuildid.c b/ld/ldbuildid.c
new file mode 100644
index 0000000..1214789
--- /dev/null
+++ b/ld/ldbuildid.c
@@ -0,0 +1,158 @@
+/* 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)
+{
+ 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;
+}