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authorUlrich Drepper <drepper@redhat.com>2006-08-24 20:21:08 +0000
committerUlrich Drepper <drepper@redhat.com>2006-08-24 20:21:08 +0000
commit93b53ca279865363a3352017c1d4456cc58e7de4 (patch)
tree24bb024fc5c1d21ec0ed470d17d912eca47f100c
parent7463d5cb4d42ffa944f05415f9d320b1b64d2bcf (diff)
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[BZ #2683]
2006-08-24 Ulrich Drepper <drepper@redhat.com> [BZ #2683] * elf/dl-addr.c (_dl_addr): Don't ignore all undefined symbols. If symbol has a value use it. * elf/tst-dladdr1.c: New file. * elf/Makefile: Add rules to build and run tst-addr1.
-rw-r--r--ChangeLog8
-rw-r--r--elf/Makefile4
-rw-r--r--elf/dl-addr.c6
-rw-r--r--elf/tst-addr1.c19
-rw-r--r--sysdeps/generic/ldsodefs.h4
5 files changed, 36 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog
index 0c975e8d..ec00150 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2006-08-24 Ulrich Drepper <drepper@redhat.com>
+
+ [BZ #2683]
+ * elf/dl-addr.c (_dl_addr): Don't ignore all undefined symbols.
+ If symbol has a value use it.
+ * elf/tst-dladdr1.c: New file.
+ * elf/Makefile: Add rules to build and run tst-addr1.
+
2006-08-24 Jakub Jelinek <jakub@redhat.com>
* malloc/malloc.c (sYSMALLOc): Avoid infinite loop if MMAP
diff --git a/elf/Makefile b/elf/Makefile
index 402fc18..6f4b026 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -170,7 +170,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
unload3 unload4 unload5 unload6 tst-global1 order2 \
tst-audit1 tst-audit2 \
- tst-stackguard1
+ tst-stackguard1 tst-addr1
# reldep9
test-srcs = tst-pathopt
tests-vis-yes = vismain
@@ -906,3 +906,5 @@ $(objpfx)tst-leaks1-mem: $(objpfx)tst-leaks1.out
$(common-objpfx)malloc/mtrace $(objpfx)tst-leaks1.mtrace > $@
tst-leaks1-ENV = MALLOC_TRACE=$(objpfx)tst-leaks1.mtrace
+
+$(objpfx)tst-addr1: $(libdl)
diff --git a/elf/dl-addr.c b/elf/dl-addr.c
index 5d3719a..720b24d 100644
--- a/elf/dl-addr.c
+++ b/elf/dl-addr.c
@@ -91,7 +91,8 @@ _dl_addr (const void *address, Dl_info *info,
{
/* The hash table never references local symbols
so we can omit that test here. */
- if (symtab[symndx].st_shndx != SHN_UNDEF
+ if ((symtab[symndx].st_shndx != SHN_UNDEF
+ || symtab[symndx].st_value != 0)
#ifdef USE_TLS
&& ELFW(ST_TYPE) (symtab[symndx].st_info) != STT_TLS
#endif
@@ -125,7 +126,8 @@ _dl_addr (const void *address, Dl_info *info,
#ifdef USE_TLS
&& ELFW(ST_TYPE) (symtab->st_info) != STT_TLS
#endif
- && symtab->st_shndx != SHN_UNDEF
+ && (symtab->st_shndx != SHN_UNDEF
+ || symtab->st_value != 0)
&& DL_ADDR_SYM_MATCH (match, symtab, matchsym, addr)
&& symtab->st_name < strtabsize)
matchsym = (ElfW(Sym) *) symtab;
diff --git a/elf/tst-addr1.c b/elf/tst-addr1.c
new file mode 100644
index 0000000..3a2cbb6
--- /dev/null
+++ b/elf/tst-addr1.c
@@ -0,0 +1,19 @@
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+
+static int
+do_test (void)
+{
+ Dl_info i;
+ if (dladdr (&printf, &i) == 0)
+ {
+ puts ("not found");
+ return 1;
+ }
+ printf ("found symbol %s in %s\n", i.dli_sname, i.dli_fname);
+ return i.dli_sname == NULL || strcmp (i.dli_sname, "printf") != 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index ef2b685..2c3ce81 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -59,8 +59,8 @@ __BEGIN_DECLS
/* Result of the lookup functions and how to retrieve the base address. */
typedef struct link_map *lookup_t;
-# define LOOKUP_VALUE(map) map
-# define LOOKUP_VALUE_ADDRESS(map) ((map) ? (map)->l_addr : 0)
+#define LOOKUP_VALUE(map) map
+#define LOOKUP_VALUE_ADDRESS(map) ((map) ? (map)->l_addr : 0)
/* On some architectures a pointer to a function is not just a pointer
to the actual code of the function but rather an architecture