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[PATCH 7/9] libdwelf: Add dwelf_elf_gnu_build_id.
- From: Mark Wielaard <mjw at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Sat, 03 May 2014 00:40:09 +0200
- Subject: [PATCH 7/9] libdwelf: Add dwelf_elf_gnu_build_id.
Move internal function __libdwfl_find_build_id to libdwelf and use it to
add a public dwelf_elf_gnu_build_id function to extract the NT_GNU_BUILD_ID
from an ELF file using either the shdrs or phdrs. Adjust internal callers
and add a testcase.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
---
libdw/ChangeLog | 4 +
libdw/libdw.map | 1 +
libdwelf/ChangeLog | 9 ++
libdwelf/Makefile.am | 6 +-
.../dwelf_elf_gnu_build_id.c | 126 ++++++---------------
libdwelf/libdwelf.h | 8 ++
libdwelf/libdwelfP.h | 1 +
libdwfl/ChangeLog | 10 ++
libdwfl/dwfl_module_build_id.c | 92 +--------------
libdwfl/dwfl_module_getdwarf.c | 31 +----
libdwfl/dwfl_segment_report_module.c | 11 +-
tests/ChangeLog | 8 ++
tests/Makefile.am | 12 +-
tests/buildid.c | 81 +++++++++++++
tests/run-buildid.sh | 38 +++++++
tests/testfile42_noshdrs.bz2 | Bin 0 -> 6746 bytes
16 files changed, 222 insertions(+), 216 deletions(-)
copy libdwfl/dwfl_module_build_id.c => libdwelf/dwelf_elf_gnu_build_id.c (60%)
create mode 100644 tests/buildid.c
create mode 100755 tests/run-buildid.sh
create mode 100644 tests/testfile42_noshdrs.bz2
diff --git a/libdw/ChangeLog b/libdw/ChangeLog
index 3152239..94ef03c 100644
--- a/libdw/ChangeLog
+++ b/libdw/ChangeLog
@@ -1,3 +1,7 @@
+2014-04-30 Mark Wielaard <mjw@redhat.com>
+
+ * libdw.map (ELFUTILS_0.159): Add dwelf_elf_gnu_build_id.
+
2014-04-15 Florian Weimer <fweimer@redhat.com>
* dwarf_begin_elf.c (__check_build_id, try_debugaltlink)
diff --git a/libdw/libdw.map b/libdw/libdw.map
index 3529980..899e13e 100644
--- a/libdw/libdw.map
+++ b/libdw/libdw.map
@@ -299,4 +299,5 @@ ELFUTILS_0.159 {
dwarf_setalt;
dwelf_dwarf_gnu_debugaltlink;
dwelf_elf_gnu_debuglink;
+ dwelf_elf_gnu_build_id;
} ELFUTILS_0.158;
diff --git a/libdwelf/ChangeLog b/libdwelf/ChangeLog
index aa29132..9f95ea8 100644
--- a/libdwelf/ChangeLog
+++ b/libdwelf/ChangeLog
@@ -1,3 +1,12 @@
+2014-04-30 Mark Wielaard <mjw@redhat.com>
+
+ * Makefile.am (AM_CPPFLAGS): Add libdwfl and libebl include dirs.
+ (libdwelf_a_SOURCES): Add dwelf_elf_gnu_build_id.c
+ * dwelf_elf_gnu_build_id.c: New file. Moved libdwfl function
+ __libdwfl_find_elf_build_id here.
+ * libdwelf.h (dwelf_elf_gnu_build_id): Declare new function.
+ * libdwelfP.h (dwelf_elf_gnu_build_id): Add internal declaration.
+
2014-04-24 Florian Weimer <fweimer@redhat.com>
* dwelf_dwarf_gnu_debugaltlink.c: New file.
diff --git a/libdwelf/Makefile.am b/libdwelf/Makefile.am
index 1ca3a5c..cd4b7dd 100644
--- a/libdwelf/Makefile.am
+++ b/libdwelf/Makefile.am
@@ -30,7 +30,8 @@
## not, see <http://www.gnu.org/licenses/>.
##
include $(top_srcdir)/config/eu.am
-AM_CPPFLAGS += -I$(srcdir)/../libelf -I$(srcdir)/../libdw
+AM_CPPFLAGS += -I$(srcdir)/../libelf -I$(srcdir)/../libdw \
+ -I$(srcdir)/../libdwfl -I$(srcdir)/../libebl
VERSION = 1
noinst_LIBRARIES = libdwelf.a libdwelf_pic.a
@@ -38,7 +39,8 @@ noinst_LIBRARIES = libdwelf.a libdwelf_pic.a
pkginclude_HEADERS = libdwelf.h
noinst_HEADERS = libdwelfP.h
-libdwelf_a_SOURCES = dwelf_elf_gnu_debuglink.c dwelf_dwarf_gnu_debugaltlink.c
+libdwelf_a_SOURCES = dwelf_elf_gnu_debuglink.c dwelf_dwarf_gnu_debugaltlink.c \
+ dwelf_elf_gnu_build_id.c
libdwelf = $(libdw)
diff --git a/libdwfl/dwfl_module_build_id.c b/libdwelf/dwelf_elf_gnu_build_id.c
similarity index 60%
copy from libdwfl/dwfl_module_build_id.c
copy to libdwelf/dwelf_elf_gnu_build_id.c
index cae007b..1ed501d 100644
--- a/libdwfl/dwfl_module_build_id.c
+++ b/libdwelf/dwelf_elf_gnu_build_id.c
@@ -1,5 +1,5 @@
-/* Return build ID information for a module.
- Copyright (C) 2007-2010 Red Hat, Inc.
+/* Returns the build id if found in a NT_GNU_BUILD_ID note.
+ Copyright (C) 2014 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
@@ -26,49 +26,22 @@
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
-#include "libdwflP.h"
-
-static int
-found_build_id (Dwfl_Module *mod, bool set,
- const void *bits, int len, GElf_Addr vaddr)
-{
- if (!set)
- /* When checking bits, we do not compare VADDR because the
- address found in a debuginfo file may not match the main
- file as modified by prelink. */
- return 1 + (mod->build_id_len == len
- && !memcmp (bits, mod->build_id_bits, len));
-
- void *copy = malloc (len);
- if (unlikely (copy == NULL))
- {
- __libdwfl_seterrno (DWFL_E_NOMEM);
- return -1;
- }
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
- mod->build_id_bits = memcpy (copy, bits, len);
- mod->build_id_vaddr = vaddr;
- mod->build_id_len = len;
- return len;
-}
+#include "libdwelfP.h"
+#include "libdwflP.h"
#define NO_VADDR ((GElf_Addr) -1l)
-int
-internal_function
-__libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
- const void **build_id_bits,
- GElf_Addr *build_id_elfaddr, int *build_id_len)
+/* Defined here for reuse. The dwelf interface doesn't care about the
+ address of the note, but libdwfl does. */
+static int
+find_elf_build_id (Dwfl_Module *mod, int e_type, Elf *elf,
+ const void **build_id_bits, GElf_Addr *build_id_elfaddr,
+ int *build_id_len)
{
- GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
- if (unlikely (ehdr == NULL))
- {
- __libdwfl_seterrno (DWFL_E_LIBELF);
- return -1;
- }
- // MOD->E_TYPE is zero here.
- assert (ehdr->e_type != ET_REL || mod != NULL);
-
int check_notes (Elf_Data *data, GElf_Addr data_elfaddr)
{
size_t pos = 0;
@@ -100,7 +73,8 @@ __libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
size_t phnum;
if (unlikely (elf_getphdrnum (elf, &phnum) != 0))
{
- __libdwfl_seterrno (DWFL_E_LIBELF);
+ if (mod != NULL)
+ __libdwfl_seterrno (DWFL_E_LIBELF);
return -1;
}
for (size_t i = 0; result == 0 && i < phnum; ++i)
@@ -126,7 +100,7 @@ __libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
GElf_Addr vaddr = 0;
if (!(shdr->sh_flags & SHF_ALLOC))
vaddr = NO_VADDR;
- else if (mod == NULL || ehdr->e_type != ET_REL)
+ else if (mod == NULL || e_type != ET_REL)
vaddr = shdr->sh_addr;
else if (__libdwfl_relocate_value (mod, elf, &shstrndx,
elf_ndxscn (scn), &vaddr))
@@ -141,61 +115,33 @@ __libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
int
internal_function
-__libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
-{
- const void *build_id_bits;
- GElf_Addr build_id_elfaddr;
- int build_id_len;
-
- int result = __libdwfl_find_elf_build_id (mod, elf, &build_id_bits,
- &build_id_elfaddr, &build_id_len);
- if (result <= 0)
- return result;
-
- GElf_Addr build_id_vaddr = build_id_elfaddr + (build_id_elfaddr != 0
- ? mod->main_bias : 0);
- return found_build_id (mod, set, build_id_bits, build_id_len, build_id_vaddr);
-}
-
-int
-dwfl_module_build_id (Dwfl_Module *mod,
- const unsigned char **bits, GElf_Addr *vaddr)
+__libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
+ const void **build_id_bits,
+ GElf_Addr *build_id_elfaddr, int *build_id_len)
{
- if (mod == NULL)
- return -1;
-
- if (mod->build_id_len == 0 && mod->main.elf != NULL)
+ GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
+ if (unlikely (ehdr == NULL))
{
- /* We have the file, but have not examined it yet. */
- int result = __libdwfl_find_build_id (mod, true, mod->main.elf);
- if (result <= 0)
- {
- mod->build_id_len = -1; /* Cache negative result. */
- return result;
- }
+ __libdwfl_seterrno (DWFL_E_LIBELF);
+ return -1;
}
+ // MOD->E_TYPE is zero here.
+ assert (ehdr->e_type != ET_REL || mod != NULL);
- if (mod->build_id_len <= 0)
- return 0;
-
- *bits = mod->build_id_bits;
- *vaddr = mod->build_id_vaddr;
- return mod->build_id_len;
+ return find_elf_build_id (mod, ehdr->e_type, elf,
+ build_id_bits, build_id_elfaddr, build_id_len);
}
-INTDEF (dwfl_module_build_id)
-NEW_VERSION (dwfl_module_build_id, ELFUTILS_0.138)
-#ifdef SHARED
-COMPAT_VERSION (dwfl_module_build_id, ELFUTILS_0.130, vaddr_at_end)
-
-int
-_compat_vaddr_at_end_dwfl_module_build_id (Dwfl_Module *mod,
- const unsigned char **bits,
- GElf_Addr *vaddr)
+ssize_t
+dwelf_elf_gnu_build_id (Elf *elf, const void **build_idp)
{
- int result = INTUSE(dwfl_module_build_id) (mod, bits, vaddr);
+ GElf_Addr build_id_elfaddr;
+ int build_id_len;
+ int result = find_elf_build_id (NULL, ET_NONE, elf, build_idp,
+ &build_id_elfaddr, &build_id_len);
if (result > 0)
- *vaddr += (result + 3) & -4;
+ return build_id_len;
+
return result;
}
-#endif
+INTDEF(dwelf_elf_gnu_build_id)
diff --git a/libdwelf/libdwelf.h b/libdwelf/libdwelf.h
index 6f1dbd3..e16dc0f 100644
--- a/libdwelf/libdwelf.h
+++ b/libdwelf/libdwelf.h
@@ -57,6 +57,14 @@ extern ssize_t dwelf_dwarf_gnu_debugaltlink (Dwarf *dwarf,
const char **namep,
const void **build_idp);
+/* Returns the build ID as found in a NT_GNU_BUILD_ID note from either
+ a SHT_NOTE section or from a PT_NOTE segment if the ELF file
+ doesn't contain any section headers. On success a pointer to the
+ build ID is written to *BUILDID_P, and the positive length of the
+ build ID is returned. Returns 0 if the ELF lacks a NT_GNU_BUILD_ID
+ note. Returns -1 in case of malformed data or other errors. */
+extern ssize_t dwelf_elf_gnu_build_id (Elf *elf, const void **build_idp);
+
#ifdef __cplusplus
}
#endif
diff --git a/libdwelf/libdwelfP.h b/libdwelf/libdwelfP.h
index c00a834..d83c759 100644
--- a/libdwelf/libdwelfP.h
+++ b/libdwelf/libdwelfP.h
@@ -37,5 +37,6 @@
/* Avoid PLT entries. */
INTDECL (dwelf_elf_gnu_debuglink)
INTDECL (dwelf_dwarf_gnu_debugaltlink)
+INTDECL (dwelf_elf_gnu_build_id)
#endif /* libdwelfP.h */
diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog
index 62ea412..7e4234d 100644
--- a/libdwfl/ChangeLog
+++ b/libdwfl/ChangeLog
@@ -1,3 +1,13 @@
+2014-04-30 Mark Wielaard <mjw@redhat.com>
+
+ * dwfl_module_build_id.c (__libdwfl_find_elf_build_id): Moved to
+ dwelf_elf_gnu_build_id.c.
+ (__libdwfl_find_build_id): Add assert to make sure mod is never NULL.
+ * dwfl_segment_report_module.c (dwfl_segment_report_module): Call
+ dwelf_elf_gnu_build_id directly instead of __libdwfl_find_build_id.
+ * dwfl_module_getdwarf.c (__check_build_id): Implement using
+ dwelf_elf_gnu_build_id.
+
2014-04-15 Florian Weimer <fweimer@redhat.com>
* dwfl_module_getdwarf.c (__check_build_id): Moved from libdw.
diff --git a/libdwfl/dwfl_module_build_id.c b/libdwfl/dwfl_module_build_id.c
index cae007b..350bbf8 100644
--- a/libdwfl/dwfl_module_build_id.c
+++ b/libdwfl/dwfl_module_build_id.c
@@ -1,5 +1,5 @@
/* Return build ID information for a module.
- Copyright (C) 2007-2010 Red Hat, Inc.
+ Copyright (C) 2007-2010, 2014 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
@@ -52,93 +52,6 @@ found_build_id (Dwfl_Module *mod, bool set,
return len;
}
-#define NO_VADDR ((GElf_Addr) -1l)
-
-int
-internal_function
-__libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
- const void **build_id_bits,
- GElf_Addr *build_id_elfaddr, int *build_id_len)
-{
- GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
- if (unlikely (ehdr == NULL))
- {
- __libdwfl_seterrno (DWFL_E_LIBELF);
- return -1;
- }
- // MOD->E_TYPE is zero here.
- assert (ehdr->e_type != ET_REL || mod != NULL);
-
- int check_notes (Elf_Data *data, GElf_Addr data_elfaddr)
- {
- size_t pos = 0;
- GElf_Nhdr nhdr;
- size_t name_pos;
- size_t desc_pos;
- while ((pos = gelf_getnote (data, pos, &nhdr, &name_pos, &desc_pos)) > 0)
- if (nhdr.n_type == NT_GNU_BUILD_ID
- && nhdr.n_namesz == sizeof "GNU" && !memcmp (data->d_buf + name_pos,
- "GNU", sizeof "GNU"))
- {
- *build_id_bits = data->d_buf + desc_pos;
- *build_id_elfaddr = (data_elfaddr == NO_VADDR
- ? 0 : data_elfaddr + desc_pos);
- *build_id_len = nhdr.n_descsz;
- return 1;
- }
- return 0;
- }
-
- size_t shstrndx = SHN_UNDEF;
- int result = 0;
-
- Elf_Scn *scn = elf_nextscn (elf, NULL);
-
- if (scn == NULL)
- {
- /* No sections, have to look for phdrs. */
- size_t phnum;
- if (unlikely (elf_getphdrnum (elf, &phnum) != 0))
- {
- __libdwfl_seterrno (DWFL_E_LIBELF);
- return -1;
- }
- for (size_t i = 0; result == 0 && i < phnum; ++i)
- {
- GElf_Phdr phdr_mem;
- GElf_Phdr *phdr = gelf_getphdr (elf, i, &phdr_mem);
- if (likely (phdr != NULL) && phdr->p_type == PT_NOTE)
- result = check_notes (elf_getdata_rawchunk (elf,
- phdr->p_offset,
- phdr->p_filesz,
- ELF_T_NHDR),
- phdr->p_vaddr);
- }
- }
- else
- do
- {
- GElf_Shdr shdr_mem;
- GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
- if (likely (shdr != NULL) && shdr->sh_type == SHT_NOTE)
- {
- /* Determine the right sh_addr in this module. */
- GElf_Addr vaddr = 0;
- if (!(shdr->sh_flags & SHF_ALLOC))
- vaddr = NO_VADDR;
- else if (mod == NULL || ehdr->e_type != ET_REL)
- vaddr = shdr->sh_addr;
- else if (__libdwfl_relocate_value (mod, elf, &shstrndx,
- elf_ndxscn (scn), &vaddr))
- vaddr = NO_VADDR;
- result = check_notes (elf_getdata (scn, NULL), vaddr);
- }
- }
- while (result == 0 && (scn = elf_nextscn (elf, scn)) != NULL);
-
- return result;
-}
-
int
internal_function
__libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
@@ -147,6 +60,9 @@ __libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
GElf_Addr build_id_elfaddr;
int build_id_len;
+ /* For mod == NULL use dwelf_elf_gnu_build_id directly. */
+ assert (mod != NULL);
+
int result = __libdwfl_find_elf_build_id (mod, elf, &build_id_bits,
&build_id_elfaddr, &build_id_len);
if (result <= 0)
diff --git a/libdwfl/dwfl_module_getdwarf.c b/libdwfl/dwfl_module_getdwarf.c
index 6163ddb..e8087bf 100644
--- a/libdwfl/dwfl_module_getdwarf.c
+++ b/libdwfl/dwfl_module_getdwarf.c
@@ -42,34 +42,13 @@ __check_build_id (Dwarf *dw, const uint8_t *build_id, const size_t id_len)
return -1;
Elf *elf = dw->elf;
- Elf_Scn *scn = elf_nextscn (elf, NULL);
- if (scn == NULL)
+ const void *elf_build_id;
+ ssize_t elf_id_len = INTUSE(dwelf_elf_gnu_build_id) (elf, &elf_build_id);
+ if (elf_id_len < 0)
return -1;
- do
- {
- GElf_Shdr shdr_mem;
- GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
- if (likely (shdr != NULL) && shdr->sh_type == SHT_NOTE)
- {
- size_t pos = 0;
- GElf_Nhdr nhdr;
- size_t name_pos;
- size_t desc_pos;
- Elf_Data *data = elf_getdata (scn, NULL);
- while ((pos = gelf_getnote (data, pos, &nhdr, &name_pos,
- &desc_pos)) > 0)
- if (nhdr.n_type == NT_GNU_BUILD_ID
- && nhdr.n_namesz == sizeof "GNU"
- && ! memcmp (data->d_buf + name_pos, "GNU", sizeof "GNU"))
- return (nhdr.n_descsz == id_len
- && ! memcmp (data->d_buf + desc_pos,
- build_id, id_len)) ? 0 : 1;
- }
- }
- while ((scn = elf_nextscn (elf, scn)) != NULL);
-
- return -1;
+ return (id_len == (size_t) elf_id_len
+ && memcmp (build_id, elf_build_id, id_len) == 0) ? 0 : 1;
}
/* Try to open an debug alt link by name, checking build_id.
diff --git a/libdwfl/dwfl_segment_report_module.c b/libdwfl/dwfl_segment_report_module.c
index fd967e9..dfecb51 100644
--- a/libdwfl/dwfl_segment_report_module.c
+++ b/libdwfl/dwfl_segment_report_module.c
@@ -494,13 +494,12 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
&& module->disk_file_has_build_id && build_id_len > 0)
{
const void *elf_build_id;
- GElf_Addr elf_build_id_elfaddr;
- int elf_build_id_len;
+ ssize_t elf_build_id_len;
- if (__libdwfl_find_elf_build_id (NULL, module->elf,
- &elf_build_id,
- &elf_build_id_elfaddr,
- &elf_build_id_len) > 0)
+ /* If there is a build id in the elf file, check it. */
+ elf_build_id_len = INTUSE(dwelf_elf_gnu_build_id) (module->elf,
+ &elf_build_id);
+ if (elf_build_id_len > 0)
{
if (build_id_len != (size_t) elf_build_id_len
|| memcmp (build_id, elf_build_id, build_id_len) != 0)
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 1c30778..ff396d5 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,11 @@
+2014-04-30 Mark Wielaard <mjw@redhat.com>
+
+ * buildid.c, buildid.sh, testfile42_noshdrs.bz2: New files.
+ * Makefile.am (check_PROGRAMS): Add buildid.
+ (TESTS): Add run-buildid.sh.
+ (EXTRA_DISTS): Add run-buildid.sh and testfile42_noshdrs.bz2.
+ (buildid_LDADD): New variable.
+
2014-04-24 Florian Weimer <fweimer@redhat.com>
* allfcts.c (setup_alt): New function.
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 33803fc..dd110a5 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -49,7 +49,9 @@ check_PROGRAMS = arextract arsymtest newfile saridx scnnames sectiondump \
alldts md5-sha1-test typeiter typeiter2 low_high_pc \
test-elf_cntl_gelf_getshdr dwflsyms dwfllines \
dwfl-report-elf-align varlocs backtrace backtrace-child \
- backtrace-data backtrace-dwarf debuglink debugaltlink
+ backtrace-data backtrace-dwarf debuglink debugaltlink \
+ buildid
+
asm_TESTS = asm-tst1 asm-tst2 asm-tst3 asm-tst4 asm-tst5 \
asm-tst6 asm-tst7 asm-tst8 asm-tst9
@@ -86,7 +88,7 @@ TESTS = run-arextract.sh run-arsymtest.sh newfile test-nlist \
run-readelf-macro.sh run-readelf-loc.sh \
run-readelf-aranges.sh run-readelf-line.sh \
run-native-test.sh run-bug1-test.sh \
- run-debuglink.sh run-debugaltlink.sh \
+ run-debuglink.sh run-debugaltlink.sh run-buildid.sh \
dwfl-bug-addr-overflow run-addrname-test.sh \
dwfl-bug-fd-leak dwfl-bug-report \
run-dwfl-bug-offline-rel.sh run-dwfl-addr-sect.sh \
@@ -176,14 +178,15 @@ EXTRA_DIST = run-arextract.sh run-arsymtest.sh \
run-readelf-test1.sh run-readelf-test2.sh run-readelf-test3.sh \
run-readelf-test4.sh run-readelf-twofiles.sh \
run-bug1-test.sh testfile28.bz2 testfile28.rdwr.bz2 \
- run-debuglink.sh run-debugaltlink.sh \
+ run-debuglink.sh run-debugaltlink.sh run-buildid.sh \
testfile29.bz2 testfile29.rdwr.bz2 \
testfile30.bz2 testfile31.bz2 testfile32.bz2 testfile33.bz2 \
testfile34.bz2 testfile35.bz2 testfile35.debug.bz2 \
testfile36.bz2 testfile36.debug.bz2 \
testfile37.bz2 testfile37.debug.bz2 \
testfile38.bz2 testfile39.bz2 testfile40.bz2 testfile40.debug.bz2 \
- testfile41.bz2 testfile42.bz2 testfile43.bz2 \
+ testfile41.bz2 testfile42.bz2 testfile42_noshdrs.bz2 \
+ testfile43.bz2 \
testfile44.S.bz2 testfile44.expect.bz2 run-disasm-x86.sh \
testfile45.S.bz2 testfile45.expect.bz2 run-disasm-x86-64.sh \
testfile46.bz2 testfile47.bz2 testfile48.bz2 testfile48.debug.bz2 \
@@ -406,6 +409,7 @@ backtrace_dwarf_CFLAGS = -Wno-unused-parameter
backtrace_dwarf_LDADD = $(libdw) $(libelf)
debuglink_LDADD = $(libdw) $(libelf)
debugaltlink_LDADD = $(libdw) $(libelf)
+buildid_LDADD = $(libdw) $(libelf)
if GCOV
check: check-am coverage
diff --git a/tests/buildid.c b/tests/buildid.c
new file mode 100644
index 0000000..87c1877
--- /dev/null
+++ b/tests/buildid.c
@@ -0,0 +1,81 @@
+/* Test program for dwelf_elf_gnu_build_id, print build ID.
+ Copyright (C) 2014 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file 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.
+
+ elfutils 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/>. */
+
+#include <config.h>
+#include <assert.h>
+#include <inttypes.h>
+#include <err.h>
+#include <errno.h>
+#include ELFUTILS_HEADER(elf)
+#include ELFUTILS_HEADER(dwelf)
+#include <stdio.h>
+#include <error.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int
+main (int argc, char *argv[])
+{
+ if (argc < 2)
+ error (EXIT_FAILURE, 0, "No input file given");
+
+ elf_version (EV_CURRENT);
+
+ for (int i = 1; i < argc; i++)
+ {
+ const char *file = argv[i];
+ int fd = open (file, O_RDONLY);
+ if (fd < 0)
+ error (EXIT_FAILURE, errno, "couldn't open file '%s'", file);
+
+ Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
+ if (elf == NULL)
+ {
+ printf("%s: elf_begin failed: %s\n", file, elf_errmsg (-1));
+ close (fd);
+ continue;
+ }
+
+ const void *build_id;
+ ssize_t len = dwelf_elf_gnu_build_id (elf, &build_id);
+ switch (len)
+ {
+ case 0:
+ printf ("%s: <no NT_GNU_BUILD_ID note>\n", file);
+ break;
+ case -1:
+ errx (1, "dwelf_elf_gnu_build_id (%s): %s",
+ file, elf_errmsg (-1));
+ default:
+ printf ("%s: build ID: ", file);
+ const unsigned char *p = build_id;
+ const unsigned char *end = p + len;
+ while (p < end)
+ printf("%02x", (unsigned)*p++);
+ putchar('\n');
+ }
+
+ elf_end (elf);
+ close (fd);
+ }
+
+ return 0;
+}
diff --git a/tests/run-buildid.sh b/tests/run-buildid.sh
new file mode 100755
index 0000000..31cec24
--- /dev/null
+++ b/tests/run-buildid.sh
@@ -0,0 +1,38 @@
+#! /bin/sh
+# Copyright (C) 2014 Red Hat, Inc.
+# This file is part of elfutils.
+#
+# This file 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.
+#
+# elfutils 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/>.
+
+. $srcdir/test-subr.sh
+
+# Just some random testfiles, four with, one without build-id,
+# and one without shdrs forcing reading the notes through phdrs.
+# eu-strip --strip-sections -g --output=testfile42_noshdrs testfile42
+# See also run-debugaltlink.sh.
+testfiles testfile42 testfile_multi.dwz testfile-dwzstr.multi \
+ test-offset-loop.alt testfile14 testfile42_noshdrs
+
+testrun_compare ${abs_builddir}/buildid testfile42 testfile42_noshdrs \
+ testfile_multi.dwz testfile-dwzstr.multi \
+ test-offset-loop.alt testfile14 <<\EOF
+testfile42: build ID: d826d96c4d097bdc5c254b1f7344a907e36b0439
+testfile42_noshdrs: build ID: d826d96c4d097bdc5c254b1f7344a907e36b0439
+testfile_multi.dwz: build ID: a0d6c06e0d912d74033b6fe2808753cae8f6f594
+testfile-dwzstr.multi: build ID: 6da22627dae55c1d62cf9122827c665e240a056b
+test-offset-loop.alt: build ID: 066bbf1a7bc5676f5015ee1966a088f23bdb83ae
+testfile14: <no NT_GNU_BUILD_ID note>
+EOF
+
+exit 0
diff --git a/tests/testfile42_noshdrs.bz2 b/tests/testfile42_noshdrs.bz2
new file mode 100644
index 0000000000000000000000000000000000000000..e50f750057435211f4aa4baa5172b1e3c4fcc4ea
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--
1.9.0