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.

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;
+}