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-rw-r--r--source/l/elfutils/elfutils-0.163-unstrip-shf_info_link.patch91
1 files changed, 91 insertions, 0 deletions
diff --git a/source/l/elfutils/elfutils-0.163-unstrip-shf_info_link.patch b/source/l/elfutils/elfutils-0.163-unstrip-shf_info_link.patch
new file mode 100644
index 000000000..e3a27ff0e
--- /dev/null
+++ b/source/l/elfutils/elfutils-0.163-unstrip-shf_info_link.patch
@@ -0,0 +1,91 @@
+commit f9fc50c3eced243c0648fb0fbfe2c9877c25e1e4
+Author: Mark Wielaard <mjw@redhat.com>
+Date: Wed Jul 29 17:51:27 2015 +0200
+
+ unstrip: Handle debuginfo files with missing SHF_INFO_LINK section flags.
+
+ With GCC 5 there might be a .rela.plt section with SHF_INFO_LINK set.
+ Buggy binutils objdump might strip it from the section in the debug file.
+ Ignore such differences for relocation sections and put the flag back
+ if necessary.
+
+ Also improve the error message a little by only discarding the already
+ matched sections if there is an prelink undo section. Otherwise we will
+ report all sections as not matching if the file wasn't prelinked instead
+ of just the non-matching sections.
+
+ New testfiles generated by gcc5 and binutils objdump added.
+
+ Signed-off-by: Mark Wielaard <mjw@redhat.com>
+
+diff --git a/src/unstrip.c b/src/unstrip.c
+index 4a8e5fa..8833094 100644
+--- a/src/unstrip.c
++++ b/src/unstrip.c
+@@ -867,12 +867,28 @@ compare_symbols_output (const void *a, const void *b)
+
+ #undef CMP
+
++/* Return true if the flags of the sections match, ignoring the SHF_INFO_LINK
++ flag if the section contains relocation information. */
++static bool
++sections_flags_match (Elf64_Xword sh_flags1, Elf64_Xword sh_flags2,
++ Elf64_Word sh_type)
++{
++ if (sh_type == SHT_REL || sh_type == SHT_RELA)
++ {
++ sh_flags1 &= ~SHF_INFO_LINK;
++ sh_flags2 &= ~SHF_INFO_LINK;
++ }
++
++ return sh_flags1 == sh_flags2;
++}
++
+ /* Return true iff the flags, size, and name match. */
+ static bool
+ sections_match (const struct section *sections, size_t i,
+ const GElf_Shdr *shdr, const char *name)
+ {
+- return (sections[i].shdr.sh_flags == shdr->sh_flags
++ return (sections_flags_match (sections[i].shdr.sh_flags, shdr->sh_flags,
++ sections[i].shdr.sh_type)
+ && (sections[i].shdr.sh_size == shdr->sh_size
+ || (sections[i].shdr.sh_size < shdr->sh_size
+ && section_can_shrink (&sections[i].shdr)))
+@@ -930,10 +946,6 @@ find_alloc_sections_prelink (Elf *debug, Elf_Data *debug_shstrtab,
+ struct section *sections,
+ size_t nalloc, size_t nsections)
+ {
+- /* Clear assignments that might have been bogus. */
+- for (size_t i = 0; i < nalloc; ++i)
+- sections[i].outscn = NULL;
+-
+ Elf_Scn *undo = NULL;
+ for (size_t i = nalloc; i < nsections; ++i)
+ {
+@@ -952,6 +964,10 @@ find_alloc_sections_prelink (Elf *debug, Elf_Data *debug_shstrtab,
+ size_t undo_nalloc = 0;
+ if (undo != NULL)
+ {
++ /* Clear assignments that might have been bogus. */
++ for (size_t i = 0; i < nalloc; ++i)
++ sections[i].outscn = NULL;
++
+ Elf_Data *undodata = elf_rawdata (undo, NULL);
+ ELF_CHECK (undodata != NULL,
+ _("cannot read '.gnu.prelink_undo' section: %s"));
+@@ -1500,6 +1516,14 @@ more sections in stripped file than debug file -- arguments reversed?"));
+ shdr_mem.sh_size = sec->shdr.sh_size;
+ shdr_mem.sh_info = sec->shdr.sh_info;
+ shdr_mem.sh_link = sec->shdr.sh_link;
++
++ /* Buggy binutils objdump might have stripped the SHF_INFO_LINK
++ put it back if necessary. */
++ if ((sec->shdr.sh_type == SHT_REL || sec->shdr.sh_type == SHT_RELA)
++ && sec->shdr.sh_flags != shdr_mem.sh_flags
++ && (sec->shdr.sh_flags & SHF_INFO_LINK) != 0)
++ shdr_mem.sh_flags |= SHF_INFO_LINK;
++
+ if (sec->shdr.sh_link != SHN_UNDEF)
+ shdr_mem.sh_link = ndx_section[sec->shdr.sh_link - 1];
+ if (shdr_mem.sh_flags & SHF_INFO_LINK)