rpm/rpm-4.11.1-sepdebugcrcfix.patch

--- rpm-4.11.1-rc1-orig/Makefile.am	2013-06-07 12:19:21.000000000 +0200
+++ rpm-4.11.1-rc1/Makefile.am	2013-06-24 18:34:06.342894002 +0200
@@ -162,6 +162,10 @@ rpmlibexec_PROGRAMS +=	elfdeps
 elfdeps_SOURCES =	tools/elfdeps.c
 elfdeps_LDADD =		rpmio/librpmio.la
 elfdeps_LDADD +=	@WITH_LIBELF_LIB@ @WITH_POPT_LIB@
+
+rpmlibexec_PROGRAMS +=	sepdebugcrcfix
+sepdebugcrcfix_SOURCES = tools/sepdebugcrcfix.c
+sepdebugcrcfix_LDADD =	@WITH_LIBELF_LIB@
 endif
 endif
 
--- rpm-4.11.1-rc1-orig/Makefile.in	2013-06-10 08:38:51.000000000 +0200
+++ rpm-4.11.1-rc1/Makefile.in	2013-06-24 18:34:06.342894002 +0200
@@ -74,7 +74,8 @@ bin_PROGRAMS = rpm2cpio$(EXEEXT) rpmbuil
 	rpmgraph$(EXEEXT)
 rpmlibexec_PROGRAMS = $(am__EXEEXT_1) rpmdeps$(EXEEXT)
 @LIBDWARF_TRUE@@LIBELF_TRUE@am__append_6 = scripts/find-debuginfo.sh
-@LIBDWARF_TRUE@@LIBELF_TRUE@am__append_7 = debugedit elfdeps
+@LIBDWARF_TRUE@@LIBELF_TRUE@am__append_7 = debugedit elfdeps \
+@LIBDWARF_TRUE@@LIBELF_TRUE@	sepdebugcrcfix
 @DOXYGEN_TRUE@@HACKINGDOCS_TRUE@am__append_8 = doc/hacking/html/index.html
 @DOXYGEN_TRUE@am__append_9 = doc/librpm/html/index.html
 @WITH_INTERNAL_DB_TRUE@am__append_10 = db.h
@@ -110,7 +111,8 @@ am__installdirs = "$(DESTDIR)$(bindir)"
 	"$(DESTDIR)$(rpmconfigdir)" "$(DESTDIR)$(rpmvardir)" \
 	"$(DESTDIR)$(pkgincludedir)" "$(DESTDIR)$(pkgincludedir)"
 @LIBDWARF_TRUE@@LIBELF_TRUE@am__EXEEXT_1 = debugedit$(EXEEXT) \
-@LIBDWARF_TRUE@@LIBELF_TRUE@	elfdeps$(EXEEXT)
+@LIBDWARF_TRUE@@LIBELF_TRUE@	elfdeps$(EXEEXT) \
+@LIBDWARF_TRUE@@LIBELF_TRUE@	sepdebugcrcfix$(EXEEXT)
 PROGRAMS = $(bin_PROGRAMS) $(rpmbin_PROGRAMS) $(rpmlibexec_PROGRAMS)
 am__debugedit_SOURCES_DIST = tools/debugedit.c tools/hashtab.c \
 	tools/hashtab.h
@@ -157,6 +159,11 @@ am_rpmspec_OBJECTS = rpmspec-rpmspec.$(O
 rpmspec_OBJECTS = $(am_rpmspec_OBJECTS)
 rpmspec_DEPENDENCIES = libcliutils.la build/librpmbuild.la \
 	lib/librpm.la rpmio/librpmio.la
+am__sepdebugcrcfix_SOURCES_DIST = tools/sepdebugcrcfix.c
+@LIBDWARF_TRUE@@LIBELF_TRUE@am_sepdebugcrcfix_OBJECTS =  \
+@LIBDWARF_TRUE@@LIBELF_TRUE@	tools/sepdebugcrcfix.$(OBJEXT)
+sepdebugcrcfix_OBJECTS = $(am_sepdebugcrcfix_OBJECTS)
+sepdebugcrcfix_DEPENDENCIES =
 am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
 am__vpath_adj = case $$p in \
     $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
@@ -223,12 +230,12 @@ SOURCES = $(libcliutils_la_SOURCES) $(de
 	$(elfdeps_SOURCES) $(rpm_SOURCES) $(rpm2cpio_SOURCES) \
 	$(rpmbuild_SOURCES) $(rpmdb_SOURCES) $(rpmdeps_SOURCES) \
 	$(rpmgraph_SOURCES) $(rpmkeys_SOURCES) $(rpmsign_SOURCES) \
-	$(rpmspec_SOURCES)
+	$(rpmspec_SOURCES) $(sepdebugcrcfix_SOURCES)
 DIST_SOURCES = $(libcliutils_la_SOURCES) $(am__debugedit_SOURCES_DIST) \
 	$(am__elfdeps_SOURCES_DIST) $(rpm_SOURCES) $(rpm2cpio_SOURCES) \
 	$(rpmbuild_SOURCES) $(rpmdb_SOURCES) $(rpmdeps_SOURCES) \
 	$(rpmgraph_SOURCES) $(rpmkeys_SOURCES) $(rpmsign_SOURCES) \
-	$(rpmspec_SOURCES)
+	$(rpmspec_SOURCES) $(am__sepdebugcrcfix_SOURCES_DIST)
 RECURSIVE_TARGETS = all-recursive check-recursive dvi-recursive \
 	html-recursive info-recursive install-data-recursive \
 	install-dvi-recursive install-exec-recursive \
@@ -636,6 +643,8 @@ rpm2cpio_LDADD = lib/librpm.la rpmio/lib
 @LIBDWARF_TRUE@@LIBELF_TRUE@elfdeps_LDADD = rpmio/librpmio.la \
 @LIBDWARF_TRUE@@LIBELF_TRUE@	@WITH_LIBELF_LIB@ @WITH_POPT_LIB@ \
 @LIBDWARF_TRUE@@LIBELF_TRUE@	$(am__empty)
+@LIBDWARF_TRUE@@LIBELF_TRUE@sepdebugcrcfix_SOURCES = tools/sepdebugcrcfix.c
+@LIBDWARF_TRUE@@LIBELF_TRUE@sepdebugcrcfix_LDADD = @WITH_LIBELF_LIB@
 rpmdeps_SOURCES = tools/rpmdeps.c
 rpmdeps_LDADD = lib/librpm.la rpmio/librpmio.la build/librpmbuild.la @WITH_POPT_LIB@
 rpmgraph_SOURCES = tools/rpmgraph.c
@@ -903,6 +912,11 @@ rpmsign$(EXEEXT): $(rpmsign_OBJECTS) $(r
 rpmspec$(EXEEXT): $(rpmspec_OBJECTS) $(rpmspec_DEPENDENCIES) $(EXTRA_rpmspec_DEPENDENCIES) 
 	@rm -f rpmspec$(EXEEXT)
 	$(AM_V_CCLD)$(LINK) $(rpmspec_OBJECTS) $(rpmspec_LDADD) $(LIBS)
+tools/sepdebugcrcfix.$(OBJEXT): tools/$(am__dirstamp) \
+	tools/$(DEPDIR)/$(am__dirstamp)
+sepdebugcrcfix$(EXEEXT): $(sepdebugcrcfix_OBJECTS) $(sepdebugcrcfix_DEPENDENCIES) $(EXTRA_sepdebugcrcfix_DEPENDENCIES) 
+	@rm -f sepdebugcrcfix$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(sepdebugcrcfix_OBJECTS) $(sepdebugcrcfix_LDADD) $(LIBS)
 install-dist_binSCRIPTS: $(dist_bin_SCRIPTS)
 	@$(NORMAL_INSTALL)
 	@list='$(dist_bin_SCRIPTS)'; test -n "$(bindir)" || list=; \
@@ -994,6 +1008,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@tools/$(DEPDIR)/hashtab.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@tools/$(DEPDIR)/rpmdeps.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@tools/$(DEPDIR)/rpmgraph.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@tools/$(DEPDIR)/sepdebugcrcfix.Po@am__quote@
 
 .c.o:
 @am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\
--- rpm-4.11.1-rc1-orig/scripts/find-debuginfo.sh	2013-06-24 17:20:55.407538301 +0200
+++ rpm-4.11.1-rc1/scripts/find-debuginfo.sh	2013-06-24 18:34:41.270897302 +0200
@@ -114,10 +114,12 @@ done
 LISTFILE="$BUILDDIR/$out"
 SOURCEFILE="$BUILDDIR/debugsources.list"
 LINKSFILE="$BUILDDIR/debuglinks.list"
+ELFBINSFILE="$BUILDDIR/elfbins.list"
 
 > "$SOURCEFILE"
 > "$LISTFILE"
 > "$LINKSFILE"
+> "$ELFBINSFILE"
 
 debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
 
@@ -316,6 +318,7 @@ while read nlinks inum f; do
 
   $include_minidebug && add_minidebug "${debugfn}" "$f"
 
+  echo "./${f#$RPM_BUILD_ROOT}" >> "$ELFBINSFILE"
   
   if [ -n "$id" ]; then
     make_id_link "$id" "$dn/$(basename $f)"
@@ -354,6 +357,10 @@ if $run_dwz && type dwz >/dev/null 2>&1
   fi
 fi
 
+# dwz invalidates .gnu_debuglink CRC32 in the main files.
+cat "$ELFBINSFILE" |
+(cd "$RPM_BUILD_ROOT"; xargs -d '\n' /usr/lib/rpm/sepdebugcrcfix usr/lib/debug)
+
 # For each symlink whose target has a .debug file,
 # make a .debug symlink to that file.
 find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*" -type l -print |
--- rpm-4.11.1-rc1-orig/tools/sepdebugcrcfix.c	1970-01-01 01:00:00.000000000 +0100
+++ rpm-4.11.1-rc1/tools/sepdebugcrcfix.c	2013-06-24 18:31:54.927881439 +0200
@@ -0,0 +1,344 @@
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+/* Version 2013-06-24.  */
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <endian.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <error.h>
+#include <libelf.h>
+#include <gelf.h>
+#include <bfd.h>
+
+#define _(x) x
+#define static_assert(expr) \
+  extern int never_defined_just_used_for_checking[(expr) ? 1 : -1]
+#ifndef min
+# define min(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+static_assert (sizeof (unsigned long) >= sizeof (uint32_t));
+
+typedef int bool;
+static const bool false = 0, true = 1;
+
+/* This is bfd_calc_gnu_debuglink_crc32 from bfd/opncls.c.  */
+static unsigned long
+    calc_gnu_debuglink_crc32 (unsigned long crc,
+			      const unsigned char *buf,
+			      bfd_size_type len)
+{
+  static const unsigned long crc32_table[256] =
+    {
+      0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+      0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+      0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+      0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+      0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+      0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+      0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+      0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+      0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+      0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+      0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+      0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+      0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+      0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+      0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+      0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+      0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+      0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+      0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+      0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+      0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+      0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+      0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+      0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+      0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+      0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+      0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+      0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+      0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+      0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+      0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+      0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+      0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+      0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+      0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+      0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+      0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+      0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+      0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+      0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+      0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+      0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+      0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+      0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+      0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+      0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+      0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+      0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+      0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+      0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+      0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+      0x2d02ef8d
+    };
+  const unsigned char *end;
+
+  crc = ~crc & 0xffffffff;
+  for (end = buf + len; buf < end; ++ buf)
+    crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+  return ~crc & 0xffffffff;
+}
+
+static size_t updated_count, matched_count, failed_count;
+
+static const char *usr_lib_debug;
+
+static bool
+crc32 (const char *fname, const char *base_fname, uint32_t *crcp)
+{
+  char *reldir = strdup (base_fname);
+  if (reldir == NULL)
+    error (1, 0, _("out of memory"));
+  char *s = reldir + strlen (reldir);
+  while (s > reldir && s[-1] != '/')
+    *--s = '\0';
+  char *debugname;
+  if (asprintf (&debugname, "%s/%s/%s", usr_lib_debug, reldir, fname) <= 0)
+    error (1, 0, _("out of memory"));
+  free (reldir);
+  int fd = open (debugname, O_RDONLY);
+  if (fd == -1)
+    {
+      error (0, errno, _("cannot open \"%s\""), debugname);
+      return false;
+    }
+  off64_t size = lseek64 (fd, 0, SEEK_END);
+  if (size == -1)
+    {
+      error (0, errno, _("cannot get size of \"%s\""), debugname);
+      return false;
+    }
+  off_t offset = 0;
+  uint32_t crc = 0;
+  void *buf = NULL;
+  while (offset < size)
+    {
+      const size_t maplen = min (0x10000, size - offset);
+      void *map = NULL;
+      if (buf == NULL)
+	{
+	  map = mmap (NULL, maplen, PROT_READ, MAP_PRIVATE | MAP_POPULATE,
+		      fd, offset);
+	  if (map == MAP_FAILED)
+	    {
+	      error (0, errno, _("cannot map 0x%llx bytes at offset 0x%llx "
+				 "of file \"%s\""),
+		     (unsigned long long) maplen, (unsigned long long) offset,
+		     debugname);
+	      map = NULL;
+	    }
+	}
+      if (map == NULL)
+	{
+	  if (buf == NULL)
+	    {
+	      buf = malloc (maplen);
+	      if (buf == NULL)
+		error (1, 0, _("out of memory"));
+	    }
+	  ssize_t got = pread (fd, buf, maplen, offset);
+	  if (got != maplen)
+	    {
+	      error (0, errno, _("cannot read 0x%llx bytes at offset 0x%llx "
+				 "of file \"%s\""),
+		     (unsigned long long) maplen, (unsigned long long) offset,
+		     debugname);
+	      free (buf);
+	      free (debugname);
+	      return false;
+	    }
+	}
+      crc = calc_gnu_debuglink_crc32 (crc, map ?: buf, maplen);
+      if (map && munmap (map, maplen) != 0)
+	error (1, errno, _("cannot unmap 0x%llx bytes at offset 0x%llx "
+			   "of file \"%s\""),
+	       (unsigned long long) maplen, (unsigned long long) offset,
+	       debugname);
+      offset += maplen;
+    }
+  free (buf);
+  if (close (fd) != 0)
+    {
+      error (0, errno, _("cannot close \"%s\""), debugname);
+      free (debugname);
+      return false;
+    }
+  free (debugname);
+  *crcp = crc;
+  return true;
+}
+
+static bool
+process (Elf *elf, int fd, const char *fname)
+{
+  GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
+  if (ehdr == NULL)
+    {
+      error (0, 0, _("cannot get ELF header of \"%s\""), fname);
+      return false;
+    }
+  if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB
+      && ehdr->e_ident[EI_DATA] != ELFDATA2MSB)
+    {
+      error (0, 0, _("invalid ELF endianity of \"%s\""), fname);
+      return false;
+    }
+  Elf_Scn *scn = NULL;
+  const char scnname[] = ".gnu_debuglink";
+  while ((scn = elf_nextscn (elf, scn)) != NULL)
+    {
+      GElf_Shdr shdr_mem, *shdr = gelf_getshdr (scn, &shdr_mem);
+      if (shdr == NULL)
+	{
+	  error (0, 0, _("cannot get section # %zu in \"%s\""),
+		 elf_ndxscn (scn), fname);
+	  continue;
+	}
+      const char *sname = elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name);
+      if (sname == NULL)
+	{
+	  error (0, 0, _("cannot get name of section # %zu in \"%s\""),
+		 elf_ndxscn (scn), fname);
+	  continue;
+	}
+      if (strcmp (sname, scnname) != 0)
+	continue;
+      Elf_Data *data = elf_getdata (scn, NULL);
+      if (data == NULL)
+	{
+	  error (0, 0, _("cannot get data of section \"%s\" # %zu in \"%s\""),
+		 scnname, elf_ndxscn (scn), fname);
+	  continue;
+	}
+      if ((data->d_size & 3) != 0)
+	{
+	  error (0, 0, _("invalid size of section \"%s\" # %zu in \"%s\""),
+		 scnname, elf_ndxscn (scn), fname);
+	  continue;
+	}
+      const uint8_t *zerop = memchr (data->d_buf, '\0', data->d_size);
+      const uint8_t *crcp = (zerop == NULL
+			     ? NULL
+			     : (const uint8_t *) ((uintptr_t) (zerop + 1 + 3)
+						  & -4));
+      if (crcp + 4 != (uint8_t *) data->d_buf + data->d_size)
+	{
+	  error (0, 0, _("invalid format of section \"%s\" # %zu in \"%s\""),
+		 scnname, elf_ndxscn (scn), fname);
+	  continue;
+	}
+      uint32_t had_crc_targetendian = *(const uint32_t *) crcp;
+      uint32_t had_crc = (ehdr->e_ident[EI_DATA] == ELFDATA2LSB
+			  ? le32toh (had_crc_targetendian)
+			  : be32toh (had_crc_targetendian));
+      uint32_t crc;
+      if (! crc32 (data->d_buf, fname, &crc))
+	return false;
+      if (crc == had_crc)
+	{
+	  matched_count++;
+	  return true;
+	}
+      updated_count++;
+      off64_t seekto = (shdr->sh_offset + data->d_off
+			+ (crcp - (const uint8_t *) data->d_buf));
+      uint32_t crc_targetendian = (ehdr->e_ident[EI_DATA] == ELFDATA2LSB
+				   ? htole32 (crc) : htobe32 (crc));
+      ssize_t wrote = pwrite (fd, &crc_targetendian, sizeof (crc_targetendian),
+			      seekto);
+      if (wrote != sizeof (crc_targetendian))
+	{
+	  error (0, 0, _("cannot write new CRC to 0x%llx "
+			 "inside section \"%s\" # %zu in \"%s\""),
+		 (unsigned long long) seekto, scnname, elf_ndxscn (scn), fname);
+	  return false;
+	}
+      return true;
+    }
+  error (0, 0, _("cannot find section \"%s\" in \"%s\""), scnname, fname);
+  return false;
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc < 2)
+    error (1, 0, _("usr/lib/debug [<relative filenames>...]"));
+  usr_lib_debug = argv[1];
+  if (elf_version (EV_CURRENT) == EV_NONE)
+    error (1, 0, _("error initializing libelf: %s"), elf_errmsg (-1));
+  for (int argi = 2; argi < argc; argi++)
+    {
+      const char *fname = argv[argi];
+      int fd = open64 (fname, O_RDWR);
+      if (fd == -1)
+	{
+	  error (0, errno, _("cannot open \"%s\""), fname);
+	  failed_count++;
+	  continue;
+	}
+      bool failed = false;
+      Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
+      if (elf == NULL)
+	{
+	  error (0, 0, _("cannot open \"%s\" as ELF: %s"), fname,
+		 elf_errmsg (-1));
+	  failed = true;
+	}
+      else
+	{
+	  if (! process (elf, fd, fname))
+	    failed = true;
+	  if (elf_end (elf) != 0)
+	    {
+	      error (0, 0, _("cannot close \"%s\" as ELF: %s"), fname,
+		     elf_errmsg (-1));
+	      failed = true;
+	    }
+	}
+      if (close (fd) != 0)
+	{
+	  error (0, errno, _("cannot close \"%s\""), fname);
+	  failed = true;
+	}
+      if (failed)
+	failed_count++;
+    }
+  printf ("%s: Updated %zu CRC32s, %zu CRC32s did match.\n", argv[0],
+	  updated_count, matched_count);
+  if (failed_count)
+    printf ("%s: Failed for %zu files.\n", argv[0], failed_count);
+  return failed_count == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+}