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- New fast verification whether the .debug file matches its peer

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(build-id).
- New locating of the matching binaries from the pure core file (build-id).
This commit is contained in:
Jan Kratochvil 2007-08-28 14:46:38 +00:00
commit 4e2e7886e3
4 changed files with 1759 additions and 1 deletions
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251
gdb-6.6-upstream.patch
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@ -882,3 +882,254 @@ IBM OzLabs - Linux Technology Centre
}
break;
case DW_LNS_set_column:
http://sourceware.org/ml/binutils/2007-08/msg00296.html
[ Backported for GDB-6.6. ]
2007-08-19 Jan Kratochvil <jan.kratochvil@redhat.com>
* bfd/elf-bfd.h (struct elf_obj_tdata): New build_id_size, build_id.
* bfd/elf.c (elfcore_read_notes): Split to ...
(elf_read_notes) ... here ...
(elf_parse_notes): ... and here. Check `bfd_get_format (abfd)' with
the former subfunctions called only for BFD_CORE.
Call ELFOBJ_GROK_GNU_NOTE for BFD_OBJECT files with the owner "GNU".
(_bfd_elf_make_section_from_shdr): Call ELF_PARSE_NOTES for SHT_NOTEs.
(bfd_section_from_phdr): Update the call for renamed ELFCORE_READ_NOTES.
(elfobj_grok_gnu_build_id, elfobj_grok_gnu_note): New functions.
Code advisory: Roland McGrath
--- gdb-6.6/bfd/elf-bfd.h.orig 2006-11-02 16:20:31.000000000 +0100
+++ gdb-6.6/bfd/elf-bfd.h 2007-08-28 15:00:42.000000000 +0200
@@ -1408,6 +1408,10 @@ struct elf_obj_tdata
/* Symbol buffer. */
Elf_Internal_Sym *symbuf;
+
+ /* NT_GNU_BUILD_ID note type. */
+ bfd_size_type build_id_size;
+ bfd_byte *build_id;
};
#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
--- ./bfd/elf.c 16 Aug 2007 18:49:42 -0000 1.410
+++ ./bfd/elf.c 19 Aug 2007 20:12:16 -0000
@@ -48,7 +48,9 @@ static int elf_sort_sections (const void
static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
static bfd_boolean prep_headers (bfd *);
static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
-static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
+static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
+static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
+ file_ptr offset);
/* Swap version information in and out. The version information is
currently size independent. If that ever changes, this code will
@@ -899,6 +901,28 @@ _bfd_elf_make_section_from_shdr (bfd *ab
if (! bfd_set_section_flags (abfd, newsect, flags))
return FALSE;
+ /* We do not parse the PT_NOTE segments as we are interested even in the
+ separate debug info files which may have the segments offsets corrupted.
+ PT_NOTEs from the core files are currently not parsed using BFD. */
+ if (hdr->sh_type == SHT_NOTE)
+ {
+ char *contents;
+
+ contents = bfd_malloc (hdr->sh_size);
+ if (!contents)
+ return FALSE;
+
+ if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
+ hdr->sh_size)
+ || !elf_parse_notes (abfd, contents, hdr->sh_size, -1))
+ {
+ free (contents);
+ return FALSE;
+ }
+
+ free (contents);
+ }
+
if ((flags & SEC_ALLOC) != 0)
{
Elf_Internal_Phdr *phdr;
@@ -2341,7 +2365,7 @@ bfd_section_from_phdr (bfd *abfd, Elf_In
case PT_NOTE:
if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
return FALSE;
- if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
+ if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
return FALSE;
return TRUE;
@@ -7713,6 +7737,32 @@ elfcore_grok_note (bfd *abfd, Elf_Intern
}
static bfd_boolean
+elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
+{
+ elf_tdata (abfd)->build_id_size = note->descsz;
+ elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
+ if (elf_tdata (abfd)->build_id == NULL)
+ return FALSE;
+
+ memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
+
+ return TRUE;
+}
+
+static bfd_boolean
+elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->type)
+ {
+ default:
+ return TRUE;
+
+ case NT_GNU_BUILD_ID:
+ return elfobj_grok_gnu_build_id (abfd, note);
+ }
+}
+
+static bfd_boolean
elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
{
char *cp;
@@ -8186,28 +8236,10 @@ elfcore_write_prxfpreg (bfd *abfd,
}
static bfd_boolean
-elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
+elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
{
- char *buf;
char *p;
- if (size <= 0)
- return TRUE;
-
- if (bfd_seek (abfd, offset, SEEK_SET) != 0)
- return FALSE;
-
- buf = bfd_malloc (size);
- if (buf == NULL)
- return FALSE;
-
- if (bfd_bread (buf, size, abfd) != size)
- {
- error:
- free (buf);
- return FALSE;
- }
-
p = buf;
while (p < buf + size)
{
@@ -8312,25 +8344,66 @@ elfcore_read_notes (bfd *abfd, file_ptr
in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
in.descpos = offset + (in.descdata - buf);
- if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
+ switch (bfd_get_format (abfd))
{
- if (! elfcore_grok_netbsd_note (abfd, &in))
- goto error;
- }
- else if (CONST_STRNEQ (in.namedata, "QNX"))
- {
- if (! elfcore_grok_nto_note (abfd, &in))
- goto error;
+ default:
+ return TRUE;
+
+ case bfd_core:
+ if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
+ {
+ if (! elfcore_grok_netbsd_note (abfd, &in))
+ return FALSE;
+ }
+ else if (CONST_STRNEQ (in.namedata, "QNX"))
+ {
+ if (! elfcore_grok_nto_note (abfd, &in))
+ return FALSE;
+ }
+ else
+ {
+ if (! elfcore_grok_note (abfd, &in))
+ return FALSE;
+ }
+ break;
+
+ case bfd_object:
+ if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
+ {
+ if (! elfobj_grok_gnu_note (abfd, &in))
+ return FALSE;
+ }
+ break;
}
- else
- {
- if (! elfcore_grok_note (abfd, &in))
- goto error;
- }
p = in.descdata + BFD_ALIGN (in.descsz, 4);
}
+ return TRUE;
+}
+
+static bfd_boolean
+elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
+{
+ char *buf;
+
+ if (size <= 0)
+ return TRUE;
+
+ if (bfd_seek (abfd, offset, SEEK_SET) != 0)
+ return FALSE;
+
+ buf = bfd_malloc (size);
+ if (buf == NULL)
+ return FALSE;
+
+ if (bfd_bread (buf, size, abfd) != size
+ || !elf_parse_notes (abfd, buf, size, offset))
+ {
+ free (buf);
+ return FALSE;
+ }
+
free (buf);
return TRUE;
}
2007-07-09 Roland McGrath <roland@redhat.com>
* common.h (NT_GNU_HWCAP, NT_GNU_BUILD_ID): New macros.
--- ./include/elf/common.h 29 Jun 2007 16:29:16 -0000 1.85
+++ ./include/elf/common.h 9 Jul 2007 21:17:42 -0000 1.86
@@ -413,9 +413,13 @@
#define NT_VERSION 1 /* Contains a version string. */
#define NT_ARCH 2 /* Contains an architecture string. */
-/* Values for GNU .note.ABI-tag notes. Note name is "GNU". */
+/* Values for notes in non-core files using name "GNU". */
#define NT_GNU_ABI_TAG 1
+#define NT_GNU_HWCAP 2 /* Used by ld.so and kernel vDSO. */
+#define NT_GNU_BUILD_ID 3 /* Generated by ld --build-id. */
+
+/* Values used in GNU .note.ABI-tag notes (NT_GNU_ABI_TAG). */
#define GNU_ABI_TAG_LINUX 0
#define GNU_ABI_TAG_HURD 1
#define GNU_ABI_TAG_SOLARIS 2