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authorFlorian Weimer <fweimer@redhat.com>2016-11-23 13:12:03 +0100
committerFlorian Weimer <fweimer@redhat.com>2016-11-23 13:12:03 +0100
commit7a5e3d9d633c828d84a9535f26b202a6179978e7 (patch)
treed90227bd1ddf169cf7d986cbd89e8b66cca1d551 /elf
parentb0216d3e4d98a3528bad428c22ff96fcbcc102a4 (diff)
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elf: Assume TLS is initialized in _dl_map_object_from_fd
libc.so uses TLS data, so when dlopen is called later, the TLS data structures have already been initialized.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-load.c54
1 files changed, 7 insertions, 47 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c
index c0d6249..51fb0d0 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -1135,54 +1135,14 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
}
#ifdef SHARED
- if (l->l_prev == NULL || (mode & __RTLD_AUDIT) != 0)
- /* We are loading the executable itself when the dynamic linker
- was executed directly. The setup will happen later. */
- break;
-
-# ifdef _LIBC_REENTRANT
- /* In a static binary there is no way to tell if we dynamically
- loaded libpthread. */
- if (GL(dl_error_catch_tsd) == &_dl_initial_error_catch_tsd)
-# endif
+ /* We are loading the executable itself when the dynamic
+ linker was executed directly. The setup will happen
+ later. Otherwise, the TLS data structures are already
+ initialized, and we assigned a TLS modid above. */
+ assert (l->l_prev == NULL || (mode & __RTLD_AUDIT) != 0);
+#else
+ assert (false && "TLS not initialized in static application");
#endif
- {
- /* We have not yet loaded libpthread.
- We can do the TLS setup right now! */
-
- void *tcb;
-
- /* The first call allocates TLS bookkeeping data structures.
- Then we allocate the TCB for the initial thread. */
- if (__glibc_unlikely (_dl_tls_setup ())
- || __glibc_unlikely ((tcb = _dl_allocate_tls (NULL)) == NULL))
- {
- errval = ENOMEM;
- errstring = N_("\
-cannot allocate TLS data structures for initial thread");
- goto call_lose;
- }
-
- /* Now we install the TCB in the thread register. */
- errstring = TLS_INIT_TP (tcb);
- if (__glibc_likely (errstring == NULL))
- {
- /* Now we are all good. */
- l->l_tls_modid = ++GL(dl_tls_max_dtv_idx);
- break;
- }
-
- /* The kernel is too old or somesuch. */
- errval = 0;
- _dl_deallocate_tls (tcb, 1);
- goto call_lose;
- }
-
- /* Uh-oh, the binary expects TLS support but we cannot
- provide it. */
- errval = 0;
- errstring = N_("cannot handle TLS data");
- goto call_lose;
break;
case PT_GNU_STACK: