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| author | Ulrich Drepper <drepper@redhat.com> | 2009-07-29 08:33:03 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-07-29 08:33:03 -0700 |
| commit | b48a267b8fbb885191a04cffdb4050a4d4c8a20b (patch) | |
| tree | 1a517e3273ee5785b44a9bd5b9aec9ae62b95ac3 /elf/dl-lookup.c | |
| parent | 9655389317c92e5935c47d90c0ba48ca54bd245e (diff) | |
| download | glibc-b48a267b8fbb885191a04cffdb4050a4d4c8a20b.tar.gz glibc-b48a267b8fbb885191a04cffdb4050a4d4c8a20b.tar.xz glibc-b48a267b8fbb885191a04cffdb4050a4d4c8a20b.zip | |
Preserve SSE registers in runtime relocations on x86-64.
SSE registers are used for passing parameters and must be preserved in runtime relocations. This is inside ld.so enforced through the tests in tst-xmmymm.sh. But the malloc routines used after startup come from libc.so and can be arbitrarily complex. It's overkill to save the SSE registers all the time because of that. These calls are rare. Instead we save them on demand. The new infrastructure put in place in this patch makes this possible and efficient.
Diffstat (limited to 'elf/dl-lookup.c')
| -rw-r--r-- | elf/dl-lookup.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 1d68d67a35..56724c9b4d 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -380,6 +380,10 @@ do_lookup_x (const char *undef_name, uint_fast32_t new_hash, if (size * 3 <= tab->n_elements * 4) { /* Expand the table. */ +#ifdef RTLD_CHECK_FOREIGN_CALL + /* This must not happen during runtime relocations. */ + assert (!RTLD_CHECK_FOREIGN_CALL); +#endif size_t newsize = _dl_higher_prime_number (size + 1); struct unique_sym *newentries = calloc (sizeof (struct unique_sym), newsize); @@ -405,6 +409,11 @@ do_lookup_x (const char *undef_name, uint_fast32_t new_hash, } else { +#ifdef RTLD_CHECK_FOREIGN_CALL + /* This must not happen during runtime relocations. */ + assert (!RTLD_CHECK_FOREIGN_CALL); +#endif + #define INITIAL_NUNIQUE_SYM_TABLE 31 size = INITIAL_NUNIQUE_SYM_TABLE; entries = calloc (sizeof (struct unique_sym), size); @@ -600,6 +609,10 @@ add_dependency (struct link_map *undef_map, struct link_map *map, int flags) unsigned int max = undef_map->l_reldepsmax ? undef_map->l_reldepsmax * 2 : 10; +#ifdef RTLD_PREPARE_FOREIGN_CALL + RTLD_PREPARE_FOREIGN_CALL; +#endif + newp = malloc (sizeof (*newp) + max * sizeof (struct link_map *)); if (newp == NULL) { |