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-rw-r--r--ldso/util/ldd.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/ldso/util/ldd.c b/ldso/util/ldd.c
index f9cdd8da0..253cf3503 100644
--- a/ldso/util/ldd.c
+++ b/ldso/util/ldd.c
@@ -29,9 +29,11 @@
*/
-#include <fcntl.h>
-#include <stdio.h>
+#define _GNU_SOURCE
+#include <features.h>
#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
@@ -150,7 +152,8 @@ static void search_for_named_library(char *name, char *result, const char *path_
*result = '\0';
}
-void locate_library_file(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_suid, struct library *lib)
+void locate_library_file(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_suid,
+ struct library *lib, char *ldpath)
{
char *buf;
char *path;
@@ -197,6 +200,14 @@ void locate_library_file(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int
}
}
+ if (ldpath) {
+ search_for_named_library(lib->name, buf, ldpath);
+ if (*buf != '\0') {
+ lib->path = buf;
+ return;
+ }
+ }
+
#ifdef USE_CACHE
/* FIXME -- add code to check the Cache here */
#endif
@@ -218,7 +229,7 @@ void locate_library_file(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int
}
}
-static int add_library(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_setuid, char *s)
+static int add_library(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_setuid, char *s, char *ldpath)
{
char *tmp, *tmp1, *tmp2;
struct library *cur, *newlib=lib_list;
@@ -262,7 +273,7 @@ static int add_library(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int i
newlib->next = NULL;
/* Now try and locate where this library might be living... */
- locate_library_file(ehdr, dynamic, strtab, is_setuid, newlib);
+ locate_library_file(ehdr, dynamic, strtab, is_setuid, newlib, ldpath);
//printf("add_library is adding '%s' to '%s'\n", newlib->name, newlib->path);
if (!lib_list) {
@@ -277,11 +288,20 @@ static int add_library(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int i
static void find_needed_libraries(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_setuid)
{
+ char * ldpath = NULL;
Elf32_Dyn *dyns;
+ Elf32_Phdr *phdr;
+
+ /* Find the path where the shared lib loader lives */
+ phdr = elf_find_phdr_type(PT_INTERP, ehdr);
+ if (phdr) {
+ ldpath = strdup((char*)ehdr + phdr->p_offset);
+ ldpath = basename(ldpath);
+ }
for (dyns=dynamic; dyns->d_tag!=DT_NULL; ++dyns) {
if (dyns->d_tag == DT_NEEDED) {
- add_library(ehdr, dynamic, strtab, is_setuid, (char*)strtab + dyns->d_un.d_val);
+ add_library(ehdr, dynamic, strtab, is_setuid, (char*)strtab + dyns->d_un.d_val, ldpath);
}
}
}