diff options
author | Roland McGrath <roland@gnu.org> | 2006-03-01 06:18:49 +0000 |
---|---|---|
committer | Roland McGrath <roland@gnu.org> | 2006-03-01 06:18:49 +0000 |
commit | d78efd9f369a8fc46229fc9224e10e3781eecc43 (patch) | |
tree | 2ab775602fdf94ce710efb518002de4a93bfab0e /elf/dl-tls.c | |
parent | 0b890d59bd75cb8ab9232ab72ed8674054e11fa3 (diff) |
* elf/tst-tls-dlinfo.c: New file.
* elf/Makefile (tests): Add it.
($(objpfx)tst-tls-dlinfo): Depend on $(libdl).
($(objpfx)tst-tls-dlinfo.out): Depend on $(objpfx)tst-tlsmod2.so.
* dlfcn/dlfcn.h (RTLD_DI_PROFILENAME, RTLD_DI_PROFILEOUT): New enum
values, reserve unsupported requested names used on Solaris.
(RTLD_DI_TLS_MODID, RTLD_DI_TLS_DATA): New enum values.
(RTLD_DI_MAX): Likewise.
* dlfcn/dlinfo.c (dlinfo_doit): Handle RTLD_DI_TLS_MODID and
RTLD_DI_TLS_DATA.
* elf/dl-tls.c (_dl_tls_get_addr_soft): New function.
* sysdeps/generic/ldsodefs.h: Declare it.
* elf/Versions (ld: GLIBC_PRIVATE): Add it.
* elf/link.h (struct dl_phdr_info): New members dlpi_tls_modid,
dlpi_tls_data.
* elf/dl-iteratephdr.c (__dl_iterate_phdr): Fill them in.
* include/link.h: Don't copy contents from elf/link.h.
Instead, #include it while #define'ing around link_map.
* elf/dl-debug.c (_dl_debug_initialize): Add a cast.
Add bogus extern decl to verify link_map members.
* elf/loadtest.c (MAPS): New macro, cast _r_debug._r_map.
(OUT, main): Use it in place of _r_debug._r_map.
* elf/unload.c: Likewise.
* elf/unload2.c: Likewise.
* elf/neededtest.c (check_loaded_objects): Likewise.
* elf/neededtest2.c (check_loaded_objects): Likewise.
* elf/neededtest3.c (check_loaded_objects): Likewise.
* elf/neededtest4.c (check_loaded_objects): Likewise.
* elf/circleload1.c (check_loaded_objects): Likewise.
Diffstat (limited to 'elf/dl-tls.c')
-rw-r--r-- | elf/dl-tls.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/elf/dl-tls.c b/elf/dl-tls.c index 4fed570d5c..a0f4f77ffa 100644 --- a/elf/dl-tls.c +++ b/elf/dl-tls.c @@ -1,5 +1,5 @@ /* Thread-local storage handling in the ELF dynamic linker. Generic version. - Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2002,2003,2004,2005,2006 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -735,9 +735,53 @@ __tls_get_addr (GET_ADDR_ARGS) # endif +/* Look up the module's TLS block as for __tls_get_addr, + but never touch anything. Return null if it's not allocated yet. */ +void * +internal_function +_dl_tls_get_addr_soft (struct link_map *l) +{ + if (__builtin_expect (l->l_tls_modid == 0, 0)) + /* This module has no TLS segment. */ + return NULL; + + dtv_t *dtv = THREAD_DTV (); + if (__builtin_expect (dtv[0].counter != GL(dl_tls_generation), 0)) + { + /* This thread's DTV is not completely current, + but it might already cover this module. */ + + if (l->l_tls_modid >= dtv[-1].counter) + /* Nope. */ + return NULL; + + size_t idx = l->l_tls_modid; + struct dtv_slotinfo_list *listp = GL(dl_tls_dtv_slotinfo_list); + while (idx >= listp->len) + { + idx -= listp->len; + listp = listp->next; + } + + /* We've reached the slot for this module. + If its generation counter is higher than the DTV's, + this thread does not know about this module yet. */ + if (dtv[0].counter < listp->slotinfo[idx].gen) + return NULL; + } + + void *data = dtv[l->l_tls_modid].pointer.val; + if (__builtin_expect (data == TLS_DTV_UNALLOCATED, 0)) + /* The DTV is current, but this thread has not yet needed + to allocate this module's segment. */ + data = NULL; + + return data; +} + void -_dl_add_to_slotinfo (struct link_map *l) +_dl_add_to_slotinfo (struct link_map *l) { /* Now that we know the object is loaded successfully add modules containing TLS data to the dtv info table. We |