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* include/link.h (FORCED_DYNAMIC_TLS_OFFSET): Define.

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* elf/dl-close.c (_dl_close): Check for it.
	* elf/dl-reloc.c (CHECK_STATIC_TLS): Likewise.
	(_dl_allocate_static_tls): Likewise.
	* elf/dl-tls.c (_dl_allocate_tls_init): Likewise.
	(__tls_get_addr): Protect from race conditions in setting l_tls_offset
	to it.
	* elf/tst-tls16.c: New file.
	* elf/tst-tlsmod16a.c: New file.
	* elf/tst-tlsmod16b.c: New file.
	* elf/Makefile: Add rules to build and run tst-tls16.
This commit is contained in:
Ulrich Drepper
2008-01-17 20:20:00 +00:00
parent a0f6c236e0
commit 4c533566c2
9 changed files with 138 additions and 10 deletions
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16
elf/dl-reloc.c
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@@ -47,8 +47,10 @@ void
internal_function __attribute_noinline__
_dl_allocate_static_tls (struct link_map *map)
{
/* If the alignment requirements are too high fail. */
if (map->l_tls_align > GL(dl_tls_static_align))
/* If we've already used the variable with dynamic access, or if the
alignment requirements are too high, fail. */
if (map->l_tls_offset == FORCED_DYNAMIC_TLS_OFFSET
|| map->l_tls_align > GL(dl_tls_static_align))
{
fail:
_dl_signal_error (0, map->l_name, NULL, N_("\
@@ -255,10 +257,12 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
an attempt to allocate it in surplus space on the fly. If that
can't be done, we fall back to the error that DF_STATIC_TLS is
intended to produce. */
#define CHECK_STATIC_TLS(map, sym_map) \
do { \
if (__builtin_expect ((sym_map)->l_tls_offset == NO_TLS_OFFSET, 0)) \
_dl_allocate_static_tls (sym_map); \
#define CHECK_STATIC_TLS(map, sym_map) \
do { \
if (__builtin_expect ((sym_map)->l_tls_offset == NO_TLS_OFFSET \
|| ((sym_map)->l_tls_offset \
== FORCED_DYNAMIC_TLS_OFFSET), 0)) \
_dl_allocate_static_tls (sym_map); \
} while (0)
#include "dynamic-link.h"