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Remove _dl_initial_dtv

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* csu/libc-tls.c (static_dtv): Renamed to ...
	(_dl_static_dtv): This.  Make it global.
	(_dl_initial_dtv): Removed.
	(__libc_setup_tls): Updated.
	* elf/dl-tls.c (DL_INITIAL_DTV): New macro.
	(_dl_deallocate_tls): Replace GL(dl_initial_dtv) with
	DL_INITIAL_DTV.
This commit is contained in:
H.J. Lu 2012-09-06 16:03:32 -07:00
parent 2abe9f1507
commit b80af2f406
3 changed files with 27 additions and 12 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
2012-09-06 H.J. Lu <hongjiu.lu@intel.com>
* csu/libc-tls.c (static_dtv): Renamed to ...
(_dl_static_dtv): This. Make it global.
(_dl_initial_dtv): Removed.
(__libc_setup_tls): Updated.
* elf/dl-tls.c (DL_INITIAL_DTV): New macro.
(_dl_deallocate_tls): Replace GL(dl_initial_dtv) with
DL_INITIAL_DTV.
2012-09-06 Petr Machata <pmachata@redhat.com>
* elf/elf.h (NT_S390_HIGH_GPRS): New macro.

20
csu/libc-tls.c
View File

@ -32,7 +32,7 @@ extern ElfW(Phdr) *_dl_phdr;
extern size_t _dl_phnum;
static dtv_t static_dtv[2 + TLS_SLOTINFO_SURPLUS];
dtv_t _dl_static_dtv[2 + TLS_SLOTINFO_SURPLUS];
static struct
@ -65,8 +65,6 @@ size_t _dl_tls_static_size = 2048;
size_t _dl_tls_static_used;
/* Alignment requirement of the static TLS block. */
size_t _dl_tls_static_align;
/* Initial dtv of the main thread, not allocated with normal malloc. */
void *_dl_initial_dtv = &static_dtv[1];
/* Generation counter for the dtv. */
size_t _dl_tls_generation;
@ -165,33 +163,33 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign)
& ~(max_align - 1));
/* Initialize the dtv. [0] is the length, [1] the generation counter. */
static_dtv[0].counter = (sizeof (static_dtv) / sizeof (static_dtv[0])) - 2;
// static_dtv[1].counter = 0; would be needed if not already done
_dl_static_dtv[0].counter = (sizeof (_dl_static_dtv) / sizeof (_dl_static_dtv[0])) - 2;
// _dl_static_dtv[1].counter = 0; would be needed if not already done
/* Initialize the TLS block. */
#if TLS_TCB_AT_TP
static_dtv[2].pointer.val = ((char *) tlsblock + tcb_offset
_dl_static_dtv[2].pointer.val = ((char *) tlsblock + tcb_offset
- roundup (memsz, align ?: 1));
static_map.l_tls_offset = roundup (memsz, align ?: 1);
#elif TLS_DTV_AT_TP
static_dtv[2].pointer.val = (char *) tlsblock + tcb_offset;
_dl_static_dtv[2].pointer.val = (char *) tlsblock + tcb_offset;
static_map.l_tls_offset = tcb_offset;
#else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
#endif
static_dtv[2].pointer.is_static = true;
_dl_static_dtv[2].pointer.is_static = true;
/* sbrk gives us zero'd memory, so we don't need to clear the remainder. */
memcpy (static_dtv[2].pointer.val, initimage, filesz);
memcpy (_dl_static_dtv[2].pointer.val, initimage, filesz);
/* Install the pointer to the dtv. */
/* Initialize the thread pointer. */
#if TLS_TCB_AT_TP
INSTALL_DTV ((char *) tlsblock + tcb_offset, static_dtv);
INSTALL_DTV ((char *) tlsblock + tcb_offset, _dl_static_dtv);
const char *lossage = TLS_INIT_TP ((char *) tlsblock + tcb_offset, 0);
#elif TLS_DTV_AT_TP
INSTALL_DTV (tlsblock, static_dtv);
INSTALL_DTV (tlsblock, _dl_static_dtv);
const char *lossage = TLS_INIT_TP (tlsblock, 0);
#else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"

9
elf/dl-tls.c
View File

@ -464,6 +464,13 @@ _dl_allocate_tls (void *mem)
rtld_hidden_def (_dl_allocate_tls)
#ifndef SHARED
extern dtv_t _dl_static_dtv[];
# define DL_INITIAL_DTV (&_dl_static_dtv[1])
#else
# define DL_INITIAL_DTV GL(dl_initial_dtv)
#endif
void
internal_function
_dl_deallocate_tls (void *tcb, bool dealloc_tcb)
@ -477,7 +484,7 @@ _dl_deallocate_tls (void *tcb, bool dealloc_tcb)
free (dtv[1 + cnt].pointer.val);
/* The array starts with dtv[-1]. */
if (dtv != GL(dl_initial_dtv))
if (dtv != DL_INITIAL_DTV)
free (dtv - 1);
if (dealloc_tcb)