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* elf/dl-load.c (_dl_map_object_from_fd): Handle PT_TLS program
	header entry.
	* elf/dl-support.c: Define _dl_initimage_list and _dl_tls_module_cnt.
This commit is contained in:
Ulrich Drepper 2002-02-05 08:38:38 +00:00
parent a2f1f5cb89
commit 96f208a425
3 changed files with 43 additions and 0 deletions
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3
ChangeLog
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@ -1,8 +1,11 @@
2002-02-05 Ulrich Drepper <drepper@redhat.com>
* elf/rtld.c (dl_main): Read PT_TLS entry of the executable.
* elf/dl-load.c (_dl_map_object_from_fd): Handle PT_TLS program
header entry.
* sysdeps/generic/ldsodefs.h (struct rtld_global): Add
_dl_tls_module_cnt.
* elf/dl-support.c: Define _dl_initimage_list and _dl_tls_module_cnt.
2002-02-04 Ulrich Drepper <drepper@redhat.com>

30
elf/dl-load.c
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@ -938,6 +938,30 @@ _dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
#endif
}
break;
#ifdef USE_TLS
case PT_TLS:
l->l_tls_blocksize = ph->p_memsz;
l->l_tls_initimage_size = ph->p_filesz;
/* Since we don't know the load address yet only store the
offset. We will adjust it later. */
l->l_tls_initimage = (void *) ph->p_offset;
/* This is the first element of the initialization image list.
It is created as a circular list so that we can easily
append to it. */
if (GL(dl_initimage_list) == NULL)
GL(dl_initimage_list) = l->l_tls_nextimage = l;
else
{
l->l_tls_nextimage = GL(dl_initimage_list);
GL(dl_initimage_list) = l;
}
/* Assign the next available module ID. */
l->l_tls_modid = ++GL(dl_tls_module_cnt);
break;
#endif
}
/* Now process the load commands and map segments into memory. */
@ -1007,6 +1031,12 @@ _dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
l->l_map_start = c->mapstart + l->l_addr;
l->l_map_end = l->l_map_start + maplength;
#ifdef USE_TLS
/* Adjust the address of the TLS initialization image. */
if (l->l_tls_initimage != NULL)
l->l_tls_initimage = (char *) l->l_tls_initimage + l->l_addr;
#endif
while (c < &loadcmds[nloadcmds])
{
if (c->mapend > c->mapstart

10
elf/dl-support.c
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@ -137,6 +137,16 @@ int _dl_correct_cache_id = _DL_CACHE_DEFAULT_ID;
At this time it is not anymore a problem to modify the tables. */
__libc_lock_define_initialized_recursive (, _dl_load_lock)
#ifdef USE_TLS
/* Beginning of the list of link maps for objects which contain
thread-local storage sections. This will be traversed to
initialize new TLS blocks. */
struct link_map *_dl_initimage_list;
/* Count the number of modules which define TLS data. */
size_t _dl_tls_module_cnt;
#endif
#ifdef HAVE_AUX_VECTOR
int _dl_clktck;