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2006-03-04 Jakub Jelinek <jakub@redhat.com>

Browse Source 
Roland McGrath  <roland@redhat.com>

	* sysdeps/unix/sysv/linux/i386/lowlevellock.h
	(LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END,
	LLL_STUB_UNWIND_INFO_3, LLL_STUB_UNWIND_INFO_4): Define.
	(lll_mutex_lock, lll_robust_mutex_lock, lll_mutex_cond_lock,
	lll_robust_mutex_cond_lock, lll_mutex_timedlock,
	lll_robust_mutex_timedlock, lll_mutex_unlock,
	lll_robust_mutex_unlock, lll_lock, lll_unlock): Use them.
	Add _L_*_ symbols around the subsection.
	* sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Add unwind info.
	* sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S: Likewise.

2006-03-03  Jakub Jelinek  <jakub@redhat.com>
            Roland McGrath  <roland@redhat.com>

	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
	(LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END,
	LLL_STUB_UNWIND_INFO_5, LLL_STUB_UNWIND_INFO_6): Define.
	(lll_mutex_lock, lll_robust_mutex_lock, lll_mutex_cond_lock,
	lll_robust_mutex_cond_lock, lll_mutex_timedlock,
	lll_robust_mutex_timedlock, lll_mutex_unlock,
	lll_robust_mutex_unlock, lll_lock, lll_unlock): Use them.
	Add _L_*_ symbols around the subsection.
	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Add unwind info.
	* sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Likewise.
This commit is contained in:
Ulrich Drepper 2006-09-05 14:49:19 +00:00
parent 71213dc258
commit cd248c3f0d
8 changed files with 594 additions and 166 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
nptl/ChangeLog
View File

@ -1,3 +1,31 @@
2006-03-04 Jakub Jelinek <jakub@redhat.com>
Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/i386/lowlevellock.h
(LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END,
LLL_STUB_UNWIND_INFO_3, LLL_STUB_UNWIND_INFO_4): Define.
(lll_mutex_lock, lll_robust_mutex_lock, lll_mutex_cond_lock,
lll_robust_mutex_cond_lock, lll_mutex_timedlock,
lll_robust_mutex_timedlock, lll_mutex_unlock,
lll_robust_mutex_unlock, lll_lock, lll_unlock): Use them.
Add _L_*_ symbols around the subsection.
* sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Add unwind info.
* sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S: Likewise.
2006-03-03 Jakub Jelinek <jakub@redhat.com>
Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
(LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END,
LLL_STUB_UNWIND_INFO_5, LLL_STUB_UNWIND_INFO_6): Define.
(lll_mutex_lock, lll_robust_mutex_lock, lll_mutex_cond_lock,
lll_robust_mutex_cond_lock, lll_mutex_timedlock,
lll_robust_mutex_timedlock, lll_mutex_unlock,
lll_robust_mutex_unlock, lll_lock, lll_unlock): Use them.
Add _L_*_ symbols around the subsection.
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Add unwind info.
* sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Likewise.
2006-08-31 Ulrich Drepper <drepper@redhat.com>
* pthread_rwlock_trywrlock.c (__pthread_rwlock_trywrlock): Undo last

61
nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -41,9 +41,16 @@
.hidden __lll_mutex_lock_wait
.align 16
__lll_mutex_lock_wait:
cfi_startproc
pushl %edx
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
cfi_offset(%edx, -8)
cfi_offset(%ebx, -12)
cfi_offset(%esi, -16)
movl $2, %edx
movl %ecx, %ebx
@ -63,9 +70,16 @@ __lll_mutex_lock_wait:
jnz 1b
popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %edx
cfi_adjust_cfa_offset(-4)
cfi_restore(%edx)
ret
cfi_endproc
.size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait
@ -75,17 +89,27 @@ __lll_mutex_lock_wait:
.hidden __lll_mutex_timedlock_wait
.align 16
__lll_mutex_timedlock_wait:
cfi_startproc
/* Check for a valid timeout value. */
cmpl $1000000000, 4(%edx)
jae 3f
pushl %edi
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %ebp
cfi_adjust_cfa_offset(4)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Stack frame for the timespec and timeval structs. */
subl $8, %esp
cfi_adjust_cfa_offset(8)
movl %ecx, %ebp
movl %edx, %edi
@ -140,12 +164,29 @@ __lll_mutex_timedlock_wait:
jnz 7f
6: addl $8, %esp
cfi_adjust_cfa_offset(-8)
popl %ebp
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebp)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %edi
cfi_adjust_cfa_offset(-4)
cfi_restore(%edi)
ret
3: movl $EINVAL, %eax
ret
cfi_adjust_cfa_offset(24)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Check whether the time expired. */
7: cmpl $-ETIMEDOUT, %ecx
je 5f
@ -157,11 +198,9 @@ __lll_mutex_timedlock_wait:
jz 6b
jmp 1b
3: movl $EINVAL, %eax
ret
5: movl $ETIMEDOUT, %eax
jmp 6b
cfi_endproc
.size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait
#endif
@ -200,9 +239,16 @@ lll_unlock_wake_cb:
.hidden __lll_mutex_unlock_wake
.align 16
__lll_mutex_unlock_wake:
cfi_startproc
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %ecx
cfi_adjust_cfa_offset(4)
pushl %edx
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
cfi_offset(%ecx, -12)
cfi_offset(%edx, -16)
movl %eax, %ebx
movl $0, (%eax)
@ -212,9 +258,16 @@ __lll_mutex_unlock_wake:
ENTER_KERNEL
popl %edx
cfi_adjust_cfa_offset(-4)
cfi_restore(%edx)
popl %ecx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ecx)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_endproc
.size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake

45
nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S
View File

@ -44,9 +44,16 @@
.hidden __lll_robust_mutex_lock_wait
.align 16
__lll_robust_mutex_lock_wait:
cfi_startproc
pushl %edx
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
cfi_offset(%edx, -8)
cfi_offset(%ebx, -12)
cfi_offset(%esi, -16)
movl %ecx, %ebx
xorl %esi, %esi /* No timeout. */
@ -81,9 +88,16 @@ __lll_robust_mutex_lock_wait:
/* NB: %eax == 0 */
3: popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %edx
cfi_adjust_cfa_offset(-4)
cfi_restore(%edx)
ret
cfi_endproc
.size __lll_robust_mutex_lock_wait,.-__lll_robust_mutex_lock_wait
@ -92,17 +106,27 @@ __lll_robust_mutex_lock_wait:
.hidden __lll_robust_mutex_timedlock_wait
.align 16
__lll_robust_mutex_timedlock_wait:
cfi_startproc
/* Check for a valid timeout value. */
cmpl $1000000000, 4(%edx)
jae 3f
pushl %edi
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %ebp
cfi_adjust_cfa_offset(4)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Stack frame for the timespec and timeval structs. */
subl $12, %esp
cfi_adjust_cfa_offset(12)
movl %ecx, %ebp
movl %edx, %edi
@ -170,19 +194,34 @@ __lll_robust_mutex_timedlock_wait:
jnz 7f
6: addl $12, %esp
cfi_adjust_cfa_offset(-12)
popl %ebp
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebp)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %edi
cfi_adjust_cfa_offset(-4)
cfi_restore(%edi)
ret
3: movl $EINVAL, %eax
ret
cfi_adjust_cfa_offset(28)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Check whether the time expired. */
7: cmpl $-ETIMEDOUT, %ecx
jne 1b
8: movl $ETIMEDOUT, %eax
jmp 6b
3: movl $EINVAL, %eax
ret
cfi_endproc
.size __lll_robust_mutex_timedlock_wait,.-__lll_robust_mutex_timedlock_wait

236
nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
View File

@ -68,6 +68,82 @@
#define BUSY_WAIT_NOP asm ("rep; nop")
#define LLL_STUB_UNWIND_INFO_START \
".section .eh_frame,\"a\",@progbits\n" \
"5:\t" ".long 7f-6f # Length of Common Information Entry\n" \
"6:\t" ".long 0x0 # CIE Identifier Tag\n\t" \
".byte 0x1 # CIE Version\n\t" \
".ascii \"zR\\0\" # CIE Augmentation\n\t" \
".uleb128 0x1 # CIE Code Alignment Factor\n\t" \
".sleb128 -4 # CIE Data Alignment Factor\n\t" \
".byte 0x8 # CIE RA Column\n\t" \
".uleb128 0x1 # Augmentation size\n\t" \
".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" \
".byte 0xc # DW_CFA_def_cfa\n\t" \
".uleb128 0x4\n\t" \
".uleb128 0x0\n\t" \
".align 4\n" \
"7:\t" ".long 17f-8f # FDE Length\n" \
"8:\t" ".long 8b-5b # FDE CIE offset\n\t" \
".long 1b-. # FDE initial location\n\t" \
".long 4b-1b # FDE address range\n\t" \
".uleb128 0x0 # Augmentation size\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x8\n\t" \
".uleb128 10f-9f\n" \
"9:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
".sleb128 3b-1b\n"
#define LLL_STUB_UNWIND_INFO_END \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x8\n\t" \
".uleb128 12f-11f\n" \
"11:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
".sleb128 3b-2b\n" \
"12:\t" ".byte 0x40 + (3b-2b-1) # DW_CFA_advance_loc\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x8\n\t" \
".uleb128 16f-13f\n" \
"13:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
".sleb128 15f-14f\n\t" \
".byte 0x0d # DW_OP_const4s\n" \
"14:\t" ".4byte 3b-.\n\t" \
".byte 0x1c # DW_OP_minus\n\t" \
".byte 0x0d # DW_OP_const4s\n" \
"15:\t" ".4byte 18f-.\n\t" \
".byte 0x22 # DW_OP_plus\n" \
"16:\t" ".align 4\n" \
"17:\t" ".previous\n"
/* Unwind info for
1: lea ..., ...
2: call ...
3: jmp 18f
4:
snippet. */
#define LLL_STUB_UNWIND_INFO_3 \
LLL_STUB_UNWIND_INFO_START \
"10:\t" ".byte 0x40 + (2b-1b) # DW_CFA_advance_loc\n\t" \
LLL_STUB_UNWIND_INFO_END
/* Unwind info for
1: lea ..., ...
0: movl ..., ...
2: call ...
3: jmp 18f
4:
snippet. */
#define LLL_STUB_UNWIND_INFO_4 \
LLL_STUB_UNWIND_INFO_START \
"10:\t" ".byte 0x40 + (0b-1b) # DW_CFA_advance_loc\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x8\n\t" \
".uleb128 20f-19f\n" \
"19:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
".sleb128 3b-0b\n" \
"20:\t" ".byte 0x40 + (2b-0b) # DW_CFA_advance_loc\n\t" \
LLL_STUB_UNWIND_INFO_END
#define lll_futex_wait(futex, val) \
({ \
int __status; \
@ -168,13 +244,14 @@ extern int __lll_mutex_unlock_wake (int *__futex)
"jnz _L_mutex_lock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_lock_%=,@function\n" \
"_L_mutex_lock_%=:\n\t" \
"leal %2, %%ecx\n\t" \
"call __lll_mutex_lock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_lock_%=,.-_L_mutex_lock_%=\n" \
"_L_mutex_lock_%=:\n" \
"1:\tleal %2, %%ecx\n" \
"2:\tcall __lll_mutex_lock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_mutex_lock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=a" (ignore1), "=c" (ignore2), "=m" (futex) \
: "0" (0), "1" (1), "m" (futex) \
: "memory"); })
@ -183,16 +260,17 @@ extern int __lll_mutex_unlock_wake (int *__futex)
#define lll_robust_mutex_lock(futex, id) \
({ int result, ignore; \
__asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
"jnz _L_mutex_lock_%=\n\t" \
"jnz _L_robust_mutex_lock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_lock_%=,@function\n" \
"_L_mutex_lock_%=:\n\t" \
"leal %2, %%ecx\n\t" \
"call __lll_robust_mutex_lock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_lock_%=,.-_L_mutex_lock_%=\n" \
".type _L_robust_mutex_lock_%=,@function\n" \
"_L_robust_mutex_lock_%=:\n" \
"1:\tleal %2, %%ecx\n" \
"2:\tcall __lll_robust_mutex_lock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_robust_mutex_lock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=a" (result), "=c" (ignore), "=m" (futex) \
: "0" (0), "1" (id), "m" (futex) \
: "memory"); \
@ -207,13 +285,14 @@ extern int __lll_mutex_unlock_wake (int *__futex)
"jnz _L_mutex_cond_lock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_cond_lock_%=,@function\n" \
"_L_mutex_cond_lock_%=:\n\t" \
"leal %2, %%ecx\n\t" \
"call __lll_mutex_lock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_cond_lock_%=,.-_L_mutex_cond_lock_%=\n" \
"_L_mutex_cond_lock_%=:\n" \
"1:\tleal %2, %%ecx\n" \
"2:\tcall __lll_mutex_lock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_mutex_cond_lock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=a" (ignore1), "=c" (ignore2), "=m" (futex) \
: "0" (0), "1" (2), "m" (futex) \
: "memory"); })
@ -222,16 +301,17 @@ extern int __lll_mutex_unlock_wake (int *__futex)
#define lll_robust_mutex_cond_lock(futex, id) \
({ int result, ignore; \
__asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
"jnz _L_mutex_cond_lock_%=\n\t" \
"jnz _L_robust_mutex_cond_lock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_cond_lock_%=,@function\n" \
"_L_mutex_cond_lock_%=:\n\t" \
"leal %2, %%ecx\n\t" \
"call __lll_robust_mutex_lock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_cond_lock_%=,.-_L_mutex_cond_lock_%=\n"\
".type _L_robust_mutex_cond_lock_%=,@function\n" \
"_L_robust_mutex_cond_lock_%=:\n" \
"1:\tleal %2, %%ecx\n" \
"2:\tcall __lll_robust_mutex_lock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_robust_mutex_cond_lock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=a" (result), "=c" (ignore), "=m" (futex) \
: "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex) \
: "memory"); \
@ -244,14 +324,15 @@ extern int __lll_mutex_unlock_wake (int *__futex)
"jnz _L_mutex_timedlock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_timedlock_%=,@function\n" \
"_L_mutex_timedlock_%=:\n\t" \
"leal %3, %%ecx\n\t" \
"movl %7, %%edx\n\t" \
"call __lll_mutex_timedlock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_timedlock_%=,.-_L_mutex_timedlock_%=\n"\
"_L_mutex_timedlock_%=:\n" \
"1:\tleal %3, %%ecx\n" \
"0:\tmovl %7, %%edx\n" \
"2:\tcall __lll_mutex_timedlock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_mutex_timedlock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_4 \
"18:" \
: "=a" (result), "=c" (ignore1), "=&d" (ignore2), \
"=m" (futex) \
: "0" (0), "1" (1), "m" (futex), "m" (timeout) \
@ -262,17 +343,18 @@ extern int __lll_mutex_unlock_wake (int *__futex)
#define lll_robust_mutex_timedlock(futex, timeout, id) \
({ int result, ignore1, ignore2; \
__asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \
"jnz _L_mutex_timedlock_%=\n\t" \
"jnz _L_robust_mutex_timedlock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_timedlock_%=,@function\n" \
"_L_mutex_timedlock_%=:\n\t" \
"leal %3, %%ecx\n\t" \
"movl %7, %%edx\n\t" \
"call __lll_robust_mutex_timedlock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_timedlock_%=,.-_L_mutex_timedlock_%=\n"\
".type _L_robust_mutex_timedlock_%=,@function\n" \
"_L_robust_mutex_timedlock_%=:\n" \
"1:\tleal %3, %%ecx\n" \
"0:\tmovl %7, %%edx\n" \
"2:\tcall __lll_robust_mutex_timedlock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_robust_mutex_timedlock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_4 \
"18:" \
: "=a" (result), "=c" (ignore1), "=&d" (ignore2), \
"=m" (futex) \
: "0" (0), "1" (id), "m" (futex), "m" (timeout) \
@ -286,13 +368,14 @@ extern int __lll_mutex_unlock_wake (int *__futex)
"jne _L_mutex_unlock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_unlock_%=,@function\n" \
"_L_mutex_unlock_%=:\n\t" \
"leal %0, %%eax\n\t" \
"call __lll_mutex_unlock_wake\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_unlock_%=,.-_L_mutex_unlock_%=\n" \
"_L_mutex_unlock_%=:\n" \
"1:\tleal %0, %%eax\n" \
"2:\tcall __lll_mutex_unlock_wake\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_mutex_unlock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=m" (futex), "=&a" (ignore) \
: "m" (futex) \
: "memory"); })
@ -301,16 +384,17 @@ extern int __lll_mutex_unlock_wake (int *__futex)
#define lll_robust_mutex_unlock(futex) \
(void) ({ int ignore; \
__asm __volatile (LOCK_INSTR "andl %2, %0\n\t" \
"jne _L_mutex_unlock_%=\n\t" \
"jne _L_robust_mutex_unlock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_unlock_%=,@function\n" \
"_L_mutex_unlock_%=:\n\t" \
"leal %0, %%eax\n\t" \
"call __lll_mutex_unlock_wake\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_unlock_%=,.-_L_mutex_unlock_%=\n" \
".type _L_robust_mutex_unlock_%=,@function\n" \
"_L_robust_mutex_unlock_%=:\n\t" \
"1:\tleal %0, %%eax\n" \
"2:\tcall __lll_mutex_unlock_wake\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_robust_mutex_unlock_%=, 4b-1b\n\t"\
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=m" (futex), "=&a" (ignore) \
: "i" (FUTEX_WAITERS), "m" (futex) \
: "memory"); })
@ -404,16 +488,17 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
"je 0f\n\t" \
"lock\n" \
"0:\tcmpxchgl %1, %2\n\t" \
"jnz _L_mutex_lock_%=\n\t" \
"jnz _L_lock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_lock_%=,@function\n" \
"_L_mutex_lock_%=:\n\t" \
"leal %2, %%ecx\n\t" \
"call __lll_mutex_lock_wait\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_lock_%=,.-_L_mutex_lock_%=\n" \
".type _L_lock_%=,@function\n" \
"_L_lock_%=:\n" \
"1:\tleal %2, %%ecx\n" \
"2:\tcall __lll_mutex_lock_wait\n" \
"3:\tjmp 18f\n" \
"4:\t.size _L_lock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=a" (ignore1), "=c" (ignore2), "=m" (futex) \
: "0" (0), "1" (1), "m" (futex), \
"i" (offsetof (tcbhead_t, multiple_threads)) \
@ -425,17 +510,18 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
__asm __volatile ("cmpl $0, %%gs:%P3\n\t" \
"je 0f\n\t" \
"lock\n" \
"0:\tsubl $1,%0\n\t" \
"jne _L_mutex_unlock_%=\n\t" \
"0:\tsubl $1,%0\n\t" \
"jne _L_unlock_%=\n\t" \
".subsection 1\n\t" \
".type _L_mutex_unlock_%=,@function\n" \
"_L_mutex_unlock_%=:\n\t" \
"leal %0, %%eax\n\t" \
"call __lll_mutex_unlock_wake\n\t" \
"jmp 1f\n\t" \
".size _L_mutex_unlock_%=,.-_L_mutex_unlock_%=\n" \
".type _L_unlock_%=,@function\n" \
"_L_unlock_%=:\n" \
"1:\tleal %0, %%eax\n" \
"2:\tcall __lll_mutex_unlock_wake\n" \
"3:\tjmp 18f\n\t" \
"4:\t.size _L_unlock_%=, 4b-1b\n\t" \
".previous\n" \
"1:" \
LLL_STUB_UNWIND_INFO_3 \
"18:" \
: "=m" (futex), "=&a" (ignore) \
: "m" (futex), \
"i" (offsetof (tcbhead_t, multiple_threads)) \

59
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
View File

@ -1,4 +1,4 @@
/* 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.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -43,9 +43,13 @@
.hidden __lll_mutex_lock_wait
.align 16
__lll_mutex_lock_wait:
cfi_startproc
pushq %r10
cfi_adjust_cfa_offset(8)
pushq %rdx
cfi_adjust_cfa_offset(8)
cfi_offset(%r10, -16)
cfi_offset(%rdx, -24)
xorq %r10, %r10 /* No timeout. */
movl $2, %edx
#if FUTEX_WAIT == 0
@ -67,8 +71,13 @@ __lll_mutex_lock_wait:
jnz 1b
popq %rdx
cfi_adjust_cfa_offset(-8)
cfi_restore(%rdx)
popq %r10
cfi_adjust_cfa_offset(-8)
cfi_restore(%r10)
retq
cfi_endproc
.size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait
@ -78,18 +87,30 @@ __lll_mutex_lock_wait:
.hidden __lll_mutex_timedlock_wait
.align 16
__lll_mutex_timedlock_wait:
cfi_startproc
/* Check for a valid timeout value. */
cmpq $1000000000, 8(%rdx)
jae 3f
pushq %r8
cfi_adjust_cfa_offset(8)
pushq %r9
cfi_adjust_cfa_offset(8)
pushq %r12
cfi_adjust_cfa_offset(8)
pushq %r13
cfi_adjust_cfa_offset(8)
pushq %r14
cfi_adjust_cfa_offset(8)
cfi_offset(%r8, -16)
cfi_offset(%r9, -24)
cfi_offset(%r12, -32)
cfi_offset(%r13, -40)
cfi_offset(%r14, -48)
/* Stack frame for the timespec and timeval structs. */
subq $16, %rsp
cfi_adjust_cfa_offset(16)
movq %rdi, %r12
movq %rdx, %r13
@ -147,13 +168,33 @@ __lll_mutex_timedlock_wait:
jnz 7f
6: addq $16, %rsp
cfi_adjust_cfa_offset(-16)
popq %r14
cfi_adjust_cfa_offset(-8)
cfi_restore(%r14)
popq %r13
cfi_adjust_cfa_offset(-8)
cfi_restore(%r13)
popq %r12
cfi_adjust_cfa_offset(-8)
cfi_restore(%r12)
popq %r9
cfi_adjust_cfa_offset(-8)
cfi_restore(%r9)
popq %r8
cfi_adjust_cfa_offset(-8)
cfi_restore(%r8)
retq
3: movl $EINVAL, %eax
retq
cfi_adjust_cfa_offset(56)
cfi_offset(%r8, -16)
cfi_offset(%r9, -24)
cfi_offset(%r12, -32)
cfi_offset(%r13, -40)
cfi_offset(%r14, -48)
/* Check whether the time expired. */
7: cmpq $-ETIMEDOUT, %rcx
je 5f
@ -165,11 +206,9 @@ __lll_mutex_timedlock_wait:
jz 6b
jmp 1b
3: movl $EINVAL, %eax
retq
5: movl $ETIMEDOUT, %eax
jmp 6b
cfi_endproc
.size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait
#endif
@ -199,8 +238,13 @@ lll_unlock_wake_cb:
.hidden __lll_mutex_unlock_wake
.align 16
__lll_mutex_unlock_wake:
cfi_startproc
pushq %rsi
cfi_adjust_cfa_offset(8)
pushq %rdx
cfi_adjust_cfa_offset(8)
cfi_offset(%rsi, -16)
cfi_offset(%rdx, -24)
movl $0, (%rdi)
movl $FUTEX_WAKE, %esi
@ -209,8 +253,13 @@ __lll_mutex_unlock_wake:
syscall
popq %rdx
cfi_adjust_cfa_offset(-8)
cfi_restore(%rdx)
popq %rsi
cfi_adjust_cfa_offset(-8)
cfi_restore(%rsi)
retq
cfi_endproc
.size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake

288
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
View File

@ -49,6 +49,104 @@
#define BUSY_WAIT_NOP asm ("rep; nop")
#define LLL_STUB_UNWIND_INFO_START \
".section .eh_frame,\"a\",@progbits\n" \
"7:\t" ".long 9f-8f # Length of Common Information Entry\n" \
"8:\t" ".long 0x0 # CIE Identifier Tag\n\t" \
".byte 0x1 # CIE Version\n\t" \
".ascii \"zR\\0\" # CIE Augmentation\n\t" \
".uleb128 0x1 # CIE Code Alignment Factor\n\t" \
".sleb128 -8 # CIE Data Alignment Factor\n\t" \
".byte 0x10 # CIE RA Column\n\t" \
".uleb128 0x1 # Augmentation size\n\t" \
".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" \
".byte 0x12 # DW_CFA_def_cfa_sf\n\t" \
".uleb128 0x7\n\t" \
".sleb128 16\n\t" \
".align 8\n" \
"9:\t" ".long 23f-10f # FDE Length\n" \
"10:\t" ".long 10b-7b # FDE CIE offset\n\t" \
".long 1b-. # FDE initial location\n\t" \
".long 6b-1b # FDE address range\n\t" \
".uleb128 0x0 # Augmentation size\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 12f-11f\n" \
"11:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 4b-1b\n"
#define LLL_STUB_UNWIND_INFO_END \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 14f-13f\n" \
"13:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 4b-2b\n" \
"14:\t" ".byte 0x40 + (3b-2b) # DW_CFA_advance_loc\n\t" \
".byte 0x0e # DW_CFA_def_cfa_offset\n\t" \
".uleb128 0\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 16f-15f\n" \
"15:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 4b-3b\n" \
"16:\t" ".byte 0x40 + (4b-3b-1) # DW_CFA_advance_loc\n\t" \
".byte 0x0e # DW_CFA_def_cfa_offset\n\t" \
".uleb128 128\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 20f-17f\n" \
"17:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 19f-18f\n\t" \
".byte 0x0d # DW_OP_const4s\n" \
"18:\t" ".4byte 4b-.\n\t" \
".byte 0x1c # DW_OP_minus\n\t" \
".byte 0x0d # DW_OP_const4s\n" \
"19:\t" ".4byte 24f-.\n\t" \
".byte 0x22 # DW_OP_plus\n" \
"20:\t" ".byte 0x40 + (5b-4b+1) # DW_CFA_advance_loc\n\t" \
".byte 0x13 # DW_CFA_def_cfa_offset_sf\n\t" \
".sleb128 16\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 22f-21f\n" \
"21:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 4b-5b\n" \
"22:\t" ".align 8\n" \
"23:\t" ".previous\n"
/* Unwind info for
1: leaq ..., %rdi
2: subq $128, %rsp
3: callq ...
4: addq $128, %rsp
5: jmp 24f
6:
snippet. */
#define LLL_STUB_UNWIND_INFO_5 \
LLL_STUB_UNWIND_INFO_START \
"12:\t" ".byte 0x40 + (2b-1b) # DW_CFA_advance_loc\n\t" \
LLL_STUB_UNWIND_INFO_END
/* Unwind info for
1: leaq ..., %rdi
0: movq ..., %rdx
2: subq $128, %rsp
3: callq ...
4: addq $128, %rsp
5: jmp 24f
6:
snippet. */
#define LLL_STUB_UNWIND_INFO_6 \
LLL_STUB_UNWIND_INFO_START \
"12:\t" ".byte 0x40 + (0b-1b) # DW_CFA_advance_loc\n\t" \
".byte 0x16 # DW_CFA_val_expression\n\t" \
".uleb128 0x10\n\t" \
".uleb128 26f-25f\n" \
"25:\t" ".byte 0x80 # DW_OP_breg16\n\t" \
".sleb128 4b-0b\n" \
"26:\t" ".byte 0x40 + (2b-0b) # DW_CFA_advance_loc\n\t" \
LLL_STUB_UNWIND_INFO_END
#define lll_futex_wait(futex, val) \
({ \
int __status; \
@ -138,14 +236,18 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
(void) ({ int ignore1, ignore2, ignore3; \
__asm __volatile (LOCK_INSTR "cmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %2, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_lock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_mutex_lock_%=, @function\n" \
"_L_mutex_lock_%=:\n" \
"1:\tleaq %2, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_lock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_mutex_lock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=S" (ignore1), "=&D" (ignore2), "=m" (futex),\
"=a" (ignore3) \
: "0" (1), "m" (futex), "3" (0) \
@ -153,17 +255,21 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
#define lll_robust_mutex_lock(futex, id) \
({ int result, ignore1, ignore2; \
({ int result, ignore1, ignore2; \
__asm __volatile (LOCK_INSTR "cmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %2, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_robust_mutex_lock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_robust_mutex_lock_%=, @function\n" \
"_L_robust_mutex_lock_%=:\n" \
"1:\tleaq %2, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_robust_mutex_lock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_robust_mutex_lock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=S" (ignore1), "=&D" (ignore2), "=m" (futex), \
"=a" (result) \
: "0" (id), "m" (futex), "3" (0) \
@ -175,14 +281,18 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
(void) ({ int ignore1, ignore2, ignore3; \
__asm __volatile (LOCK_INSTR "cmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %2, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_lock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_mutex_cond_lock_%=, @function\n" \
"_L_mutex_cond_lock_%=:\n" \
"1:\tleaq %2, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_lock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_mutex_cond_lock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=S" (ignore1), "=&D" (ignore2), "=m" (futex),\
"=a" (ignore3) \
: "0" (2), "m" (futex), "3" (0) \
@ -193,14 +303,18 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
({ int result, ignore1, ignore2; \
__asm __volatile (LOCK_INSTR "cmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %2, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_robust_mutex_lock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_robust_mutex_cond_lock_%=, @function\n" \
"_L_robust_mutex_cond_lock_%=:\n" \
"1:\tleaq %2, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_robust_mutex_lock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_robust_mutex_cond_lock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=S" (ignore1), "=&D" (ignore2), "=m" (futex), \
"=a" (result) \
: "0" (id | FUTEX_WAITERS), "m" (futex), "3" (0) \
@ -212,15 +326,19 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
({ int result, ignore1, ignore2, ignore3; \
__asm __volatile (LOCK_INSTR "cmpxchgl %2, %4\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %4, %%rdi\n\t" \
"movq %8, %%rdx\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_timedlock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_mutex_timedlock_%=, @function\n" \
"_L_mutex_timedlock_%=:\n" \
"1:\tleaq %4, %%rdi\n" \
"0:\tmovq %8, %%rdx\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_timedlock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_mutex_timedlock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_6 \
"24:" \
: "=a" (result), "=&D" (ignore1), "=S" (ignore2), \
"=&d" (ignore3), "=m" (futex) \
: "0" (0), "2" (1), "m" (futex), "m" (timeout) \
@ -232,15 +350,19 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
({ int result, ignore1, ignore2, ignore3; \
__asm __volatile (LOCK_INSTR "cmpxchgl %2, %4\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %4, %%rdi\n\t" \
"movq %8, %%rdx\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_robust_mutex_timedlock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_robust_mutex_timedlock_%=, @function\n" \
"_L_robust_mutex_timedlock_%=:\n" \
"1:\tleaq %4, %%rdi\n" \
"0:\tmovq %8, %%rdx\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_robust_mutex_timedlock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_robust_mutex_timedlock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_6 \
"24:" \
: "=a" (result), "=&D" (ignore1), "=S" (ignore2), \
"=&d" (ignore3), "=m" (futex) \
: "0" (0), "2" (id), "m" (futex), "m" (timeout) \
@ -252,14 +374,18 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
(void) ({ int ignore; \
__asm __volatile (LOCK_INSTR "decl %0\n\t" \
"jne 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %0, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_unlock_wake\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_mutex_unlock_%=, @function\n" \
"_L_mutex_unlock_%=:\n" \
"1:\tleaq %0, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_unlock_wake\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_mutex_unlock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=m" (futex), "=&D" (ignore) \
: "m" (futex) \
: "ax", "cx", "r11", "cc", "memory"); })
@ -269,14 +395,18 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
(void) ({ int ignore; \
__asm __volatile (LOCK_INSTR "andl %2, %0\n\t" \
"jne 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %0, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_unlock_wake\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_robust_mutex_unlock_%=, @function\n" \
"_L_robust_mutex_unlock_%=:\n" \
"1:\tleaq %0, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_unlock_wake\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_robust_mutex_unlock_%=, 6b-1b\n\t"\
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=m" (futex), "=&D" (ignore) \
: "i" (FUTEX_WAITERS), "m" (futex) \
: "ax", "cx", "r11", "cc", "memory"); })
@ -351,17 +481,21 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
"je 0f\n\t" \
"lock; cmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
"jmp 2f\n" \
"jmp 24f\n" \
"0:\tcmpxchgl %0, %2\n\t" \
"jnz 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %2, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_lock_wait\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_lock_%=, @function\n" \
"_L_lock_%=:\n" \
"1:\tleaq %2, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_lock_wait\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_lock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=S" (ignore1), "=&D" (ignore2), "=m" (futex),\
"=a" (ignore3) \
: "0" (1), "m" (futex), "3" (0) \
@ -374,17 +508,21 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
"je 0f\n\t" \
"lock; decl %0\n\t" \
"jne 1f\n\t" \
"jmp 2f\n" \
"jmp 24f\n" \
"0:\tdecl %0\n\t" \
"jne 1f\n\t" \
".subsection 1\n" \
"1:\tleaq %0, %%rdi\n\t" \
"subq $128, %%rsp\n\t" \
"callq __lll_mutex_unlock_wake\n\t" \
"addq $128, %%rsp\n\t" \
"jmp 2f\n\t" \
".subsection 1\n\t" \
".type _L_unlock_%=, @function\n" \
"_L_unlock_%=:\n" \
"1:\tleaq %0, %%rdi\n" \
"2:\tsubq $128, %%rsp\n" \
"3:\tcallq __lll_mutex_unlock_wake\n" \
"4:\taddq $128, %%rsp\n" \
"5:\tjmp 24f\n" \
"6:\t.size _L_unlock_%=, 6b-1b\n\t" \
".previous\n" \
"2:" \
LLL_STUB_UNWIND_INFO_5 \
"24:" \
: "=m" (futex), "=&D" (ignore) \
: "m" (futex) \
: "ax", "cx", "r11", "cc", "memory"); })

41
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S
View File

@ -46,8 +46,13 @@
.hidden __lll_robust_mutex_lock_wait
.align 16
__lll_robust_mutex_lock_wait:
cfi_startproc
pushq %r10
cfi_adjust_cfa_offset(8)
pushq %rdx
cfi_adjust_cfa_offset(8)
cfi_offset(%r10, -16)
cfi_offset(%rdx, -24)
xorq %r10, %r10 /* No timeout. */
#if FUTEX_WAIT == 0
@ -85,8 +90,13 @@ __lll_robust_mutex_lock_wait:
/* NB: %rax == 0 */
3: popq %rdx
cfi_adjust_cfa_offset(-8)
cfi_restore(%rdx)
popq %r10
cfi_adjust_cfa_offset(-8)
cfi_restore(%r10)
retq
cfi_endproc
.size __lll_robust_mutex_lock_wait,.-__lll_robust_mutex_lock_wait
@ -95,17 +105,27 @@ __lll_robust_mutex_lock_wait:
.hidden __lll_robust_mutex_timedlock_wait
.align 16
__lll_robust_mutex_timedlock_wait:
cfi_startproc
/* Check for a valid timeout value. */
cmpq $1000000000, 8(%rdx)
jae 3f
pushq %r8
cfi_adjust_cfa_offset(8)
pushq %r9
cfi_adjust_cfa_offset(8)
pushq %r12
cfi_adjust_cfa_offset(8)
pushq %r13
cfi_adjust_cfa_offset(8)
cfi_offset(%r8, -16)
cfi_offset(%r9, -24)
cfi_offset(%r12, -32)
cfi_offset(%r13, -40)
/* Stack frame for the timespec and timeval structs. */
subq $24, %rsp
cfi_adjust_cfa_offset(24)
movq %rdi, %r12
movq %rdx, %r13
@ -176,19 +196,34 @@ __lll_robust_mutex_timedlock_wait:
jnz 7f
6: addq $24, %rsp
cfi_adjust_cfa_offset(-24)
popq %r13
cfi_adjust_cfa_offset(-8)
cfi_restore(%r13)
popq %r12
cfi_adjust_cfa_offset(-8)
cfi_restore(%r12)
popq %r9
cfi_adjust_cfa_offset(-8)
cfi_restore(%r9)
popq %r8
cfi_adjust_cfa_offset(-8)
cfi_restore(%r8)
retq
3: movl $EINVAL, %eax
retq
cfi_adjust_cfa_offset(56)
cfi_offset(%r8, -16)
cfi_offset(%r9, -24)
cfi_offset(%r12, -32)
cfi_offset(%r13, -40)
/* Check whether the time expired. */
7: cmpq $-ETIMEDOUT, %rcx
jne 1b
8: movl $ETIMEDOUT, %eax
jmp 6b
3: movl $EINVAL, %eax
retq
cfi_endproc
.size __lll_robust_mutex_timedlock_wait,.-__lll_robust_mutex_timedlock_wait

2
nscd/initgrcache.c
View File

@ -107,6 +107,7 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
long int start = 0;
bool all_tryagain = true;
bool any_success = false;
/* This is temporary memory, we need not (ad must not) call
mempool_alloc. */
@ -117,7 +118,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
goto out;
/* Nothing added yet. */
bool any_success = false;
while (! no_more)
{
long int prev_start = start;