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authorUlrich Drepper <drepper@redhat.com>2004-08-09 06:41:04 +0000
committerUlrich Drepper <drepper@redhat.com>2004-08-09 06:41:04 +0000
commitc14e91352e26aa4e1622f08bb9a25a9527a8db2b (patch)
treebb3fe3f376564b7a9cf5ca4d6d89c0ad55e6a276 /elf
parent807645d725f68619543836e196ae49f7b5fb5505 (diff)
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[BZ #116]
Update. * elf/dl-load.c (_dl_map_object): If __RTLD_CALLMAP flag is set, reset loader before the actual loading. * elf/dl-open.c (dl_open_worker): If file name contains no path element determine map of caller. Pass caller map in this case to _dl_map_object. Set __RTLD_CALLMAP in mode. * include/dlfcn.h (__RTLD_CALLMAP): Define. [BZ #116] Patch by Greg Wolodkin <greg@mathworks.com>.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-load.c6
-rw-r--r--elf/dl-open.c42
2 files changed, 33 insertions, 15 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c
index afbb06b9e5..cb0642a6d2 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -1914,6 +1914,12 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
}
}
+ /* In case the LOADER information has only been provided to get to
+ the appropriate RUNPATH/RPATH information we do not need it
+ anymore. */
+ if (mode & __RTLD_CALLMAP)
+ loader = NULL;
+
if (__builtin_expect (fd, 0) == -1)
{
if (trace_mode
diff --git a/elf/dl-open.c b/elf/dl-open.c
index 450024948a..c352722e27 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -163,32 +163,24 @@ dl_open_worker (void *a)
const char *file = args->file;
int mode = args->mode;
struct link_map *new, *l;
- const char *dst;
int lazy;
unsigned int i;
#ifdef USE_TLS
bool any_tls;
#endif
+ struct link_map *call_map = NULL;
/* Check whether _dl_open() has been called from a valid DSO. */
if (__check_caller (args->caller_dl_open, allow_libc|allow_libdl) != 0)
GLRO(dl_signal_error) (0, "dlopen", NULL, N_("invalid caller"));
- /* Maybe we have to expand a DST. */
- dst = strchr (file, '$');
- if (__builtin_expect (dst != NULL, 0))
+ /* Determine the caller's map if necessary. This is needed in case
+ we have a DST or when the file name has no path in which case we
+ need to look along the RUNPATH/RPATH of the caller. */
+ const char *dst = strchr (file, '$');
+ if (dst != NULL || strchr (file, '/') == NULL)
{
const void *caller_dlopen = args->caller_dlopen;
- size_t len = strlen (file);
- size_t required;
- struct link_map *call_map;
- char *new_file;
-
- /* DSTs must not appear in SUID/SGID programs. */
- if (__libc_enable_secure)
- /* This is an error. */
- GLRO(dl_signal_error) (0, "dlopen", NULL,
- N_("DST not allowed in SUID/SGID programs"));
/* We have to find out from which object the caller is calling. */
call_map = NULL;
@@ -205,6 +197,21 @@ dl_open_worker (void *a)
if (call_map == NULL)
/* In this case we assume this is the main application. */
call_map = GL(dl_loaded);
+ }
+
+ /* Maybe we have to expand a DST. */
+ if (__builtin_expect (dst != NULL, 0))
+ {
+ size_t len = strlen (file);
+ size_t required;
+ char *new_file;
+
+ /* DSTs must not appear in SUID/SGID programs. */
+ if (__libc_enable_secure)
+ /* This is an error. */
+ GLRO(dl_signal_error) (0, "dlopen", NULL,
+ N_("DST not allowed in SUID/SGID programs"));
+
/* Determine how much space we need. We have to allocate the
memory locally. */
@@ -223,10 +230,15 @@ dl_open_worker (void *a)
/* Now we have a new file name. */
file = new_file;
+
+ /* It does not matter whether call_map is set even if we
+ computed it only because of the DST. Since the path contains
+ a slash the value is not used. See dl-load.c. */
}
/* Load the named object. */
- args->map = new = GLRO(dl_map_object) (NULL, file, 0, lt_loaded, 0, mode);
+ args->map = new = GLRO(dl_map_object) (call_map, file, 0, lt_loaded, 0,
+ mode | __RTLD_CALLMAP);
/* If the pointer returned is NULL this means the RTLD_NOLOAD flag is
set and the object is not already loaded. */