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-rw-r--r--nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h332
1 files changed, 278 insertions, 54 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
index b86f11c9b4..21de09fe91 100644
--- a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
@@ -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.
@@ -35,6 +35,9 @@
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
+#define FUTEX_LOCK_PI 6
+#define FUTEX_UNLOCK_PI 7
+#define FUTEX_TRYLOCK_PI 8
/* Initializer for compatibility lock. */
@@ -65,18 +68,112 @@
#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) \
- do { \
- int __ignore; \
+ ({ \
+ int __status; \
register __typeof (val) _val asm ("edx") = (val); \
__asm __volatile (LLL_EBX_LOAD \
LLL_ENTER_KERNEL \
LLL_EBX_LOAD \
- : "=a" (__ignore) \
+ : "=a" (__status) \
: "0" (SYS_futex), LLL_EBX_REG (futex), "S" (0), \
"c" (FUTEX_WAIT), "d" (_val), \
- "i" (offsetof (tcbhead_t, sysinfo))); \
- } while (0)
+ "i" (offsetof (tcbhead_t, sysinfo)) \
+ : "memory"); \
+ __status; \
+ })
+
+
+#define lll_futex_timed_wait(futex, val, timeout) \
+ ({ \
+ int __status; \
+ register __typeof (val) _val asm ("edx") = (val); \
+ __asm __volatile (LLL_EBX_LOAD \
+ LLL_ENTER_KERNEL \
+ LLL_EBX_LOAD \
+ : "=a" (__status) \
+ : "0" (SYS_futex), LLL_EBX_REG (futex), "S" (timeout), \
+ "c" (FUTEX_WAIT), "d" (_val), \
+ "i" (offsetof (tcbhead_t, sysinfo)) \
+ : "memory"); \
+ __status; \
+ })
#define lll_futex_wake(futex, nr) \
@@ -121,6 +218,16 @@ extern int __lll_mutex_unlock_wake (int *__futex)
ret; })
+#define lll_robust_mutex_trylock(futex, id) \
+ ({ int ret; \
+ __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \
+ : "=a" (ret), "=m" (futex) \
+ : "r" (id), "m" (futex), \
+ "0" (LLL_MUTEX_LOCK_INITIALIZER) \
+ : "memory"); \
+ ret; })
+
+
#define lll_mutex_cond_trylock(futex) \
({ int ret; \
__asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \
@@ -137,18 +244,39 @@ 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"); })
+#define lll_robust_mutex_lock(futex, id) \
+ ({ int result, ignore; \
+ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
+ "jnz _L_robust_mutex_lock_%=\n\t" \
+ ".subsection 1\n\t" \
+ ".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" \
+ LLL_STUB_UNWIND_INFO_3 \
+ "18:" \
+ : "=a" (result), "=c" (ignore), "=m" (futex) \
+ : "0" (0), "1" (id), "m" (futex) \
+ : "memory"); \
+ result; })
+
+
/* Special version of lll_mutex_lock which causes the unlock function to
always wakeup waiters. */
#define lll_mutex_cond_lock(futex) \
@@ -157,32 +285,54 @@ 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"); })
+#define lll_robust_mutex_cond_lock(futex, id) \
+ ({ int result, ignore; \
+ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
+ "jnz _L_robust_mutex_cond_lock_%=\n\t" \
+ ".subsection 1\n\t" \
+ ".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" \
+ LLL_STUB_UNWIND_INFO_3 \
+ "18:" \
+ : "=a" (result), "=c" (ignore), "=m" (futex) \
+ : "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex) \
+ : "memory"); \
+ result; })
+
+
#define lll_mutex_timedlock(futex, timeout) \
({ int result, ignore1, ignore2; \
__asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \
"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) \
@@ -190,24 +340,95 @@ extern int __lll_mutex_unlock_wake (int *__futex)
result; })
+#define lll_robust_mutex_timedlock(futex, timeout, id) \
+ ({ int result, ignore1, ignore2; \
+ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \
+ "jnz _L_robust_mutex_timedlock_%=\n\t" \
+ ".subsection 1\n\t" \
+ ".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" \
+ LLL_STUB_UNWIND_INFO_4 \
+ "18:" \
+ : "=a" (result), "=c" (ignore1), "=&d" (ignore2), \
+ "=m" (futex) \
+ : "0" (0), "1" (id), "m" (futex), "m" (timeout) \
+ : "memory"); \
+ result; })
+
+
#define lll_mutex_unlock(futex) \
(void) ({ int ignore; \
- __asm __volatile (LOCK_INSTR "subl $1,%0\n\t" \
+ __asm __volatile (LOCK_INSTR "subl $1, %0\n\t" \
"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"); })
+#define lll_robust_mutex_unlock(futex) \
+ (void) ({ int ignore; \
+ __asm __volatile (LOCK_INSTR "andl %2, %0\n\t" \
+ "jne _L_robust_mutex_unlock_%=\n\t" \
+ ".subsection 1\n\t" \
+ ".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" \
+ LLL_STUB_UNWIND_INFO_3 \
+ "18:" \
+ : "=m" (futex), "=&a" (ignore) \
+ : "i" (FUTEX_WAITERS), "m" (futex) \
+ : "memory"); })
+
+
+#define lll_robust_mutex_dead(futex) \
+ (void) ({ int __ignore; \
+ register int _nr asm ("edx") = 1; \
+ __asm __volatile (LOCK_INSTR "orl %5, (%2)\n\t" \
+ LLL_EBX_LOAD \
+ LLL_ENTER_KERNEL \
+ LLL_EBX_LOAD \
+ : "=a" (__ignore) \
+ : "0" (SYS_futex), LLL_EBX_REG (&(futex)), \
+ "c" (FUTEX_WAKE), "d" (_nr), \
+ "i" (FUTEX_OWNER_DIED), \
+ "i" (offsetof (tcbhead_t, sysinfo))); })
+
+
+#define lll_futex_wake(futex, nr) \
+ do { \
+ int __ignore; \
+ register __typeof (nr) _nr asm ("edx") = (nr); \
+ __asm __volatile (LLL_EBX_LOAD \
+ LLL_ENTER_KERNEL \
+ LLL_EBX_LOAD \
+ : "=a" (__ignore) \
+ : "0" (SYS_futex), LLL_EBX_REG (futex), \
+ "c" (FUTEX_WAKE), "d" (_nr), \
+ "i" (0) /* phony, to align next arg's number */, \
+ "i" (offsetof (tcbhead_t, sysinfo))); \
+ } while (0)
+
+
#define lll_mutex_islocked(futex) \
(futex != 0)
@@ -250,7 +471,7 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
# define lll_trylock(futex) \
({ unsigned char ret; \
__asm __volatile ("cmpl $0, %%gs:%P5\n\t" \
- "je,pt 0f\n\t" \
+ "je 0f\n\t" \
"lock\n" \
"0:\tcmpxchgl %2, %1; setne %0" \
: "=a" (ret), "=m" (futex) \
@@ -264,19 +485,20 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
# define lll_lock(futex) \
(void) ({ int ignore1, ignore2; \
__asm __volatile ("cmpl $0, %%gs:%P6\n\t" \
- "je,pt 0f\n\t" \
+ "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)) \
@@ -286,19 +508,20 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
# define lll_unlock(futex) \
(void) ({ int ignore; \
__asm __volatile ("cmpl $0, %%gs:%P3\n\t" \
- "je,pt 0f\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)) \
@@ -325,12 +548,13 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
"1:\tmovl %1, %%eax\n\t" \
LLL_ENTER_KERNEL \
"cmpl $0, (%%ebx)\n\t" \
- "jne,pn 1b\n\t" \
+ "jne 1b\n\t" \
LLL_EBX_LOAD \
: "=&a" (__ignore) \
: "i" (SYS_futex), LLL_EBX_REG (&tid), "S" (0), \
"c" (FUTEX_WAIT), "d" (_tid), \
- "i" (offsetof (tcbhead_t, sysinfo))); \
+ "i" (offsetof (tcbhead_t, sysinfo)) \
+ : "memory"); \
} while (0)
extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-17 02:37:43 +0000