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Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S228
1 files changed, 205 insertions, 23 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
index 8c5c2a6974..4068a1b6b8 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
@@ -20,6 +20,7 @@
#include <sysdep.h>
#include <shlib-compat.h>
#include <pthread-errnos.h>
+#include <structsem.h>
#ifndef UP
# define LOCK lock
@@ -28,6 +29,7 @@
#endif
#define SYS_futex 202
+#define FUTEX_WAIT 0
/* For the calculation see asm/vsyscall.h. */
#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000
@@ -38,15 +40,23 @@
.globl sem_timedwait
.type sem_timedwait,@function
.align 16
- cfi_startproc
sem_timedwait:
+.LSTARTCODE:
+#if VALUE == 0
movl (%rdi), %eax
+#else
+ movl VALUE(%rdi), %eax
+#endif
2: testl %eax, %eax
je 1f
leaq -1(%rax), %rdx
LOCK
+#if VALUE == 0
cmpxchgl %edx, (%rdi)
+#else
+ cmpxchgl %edx, VALUE(%rdi)
+#endif
jne 2b
xorl %eax, %eax
@@ -54,25 +64,25 @@ sem_timedwait:
/* Check whether the timeout value is valid. */
1: pushq %r12
- cfi_adjust_cfa_offset(8)
+.Lpush_r12:
pushq %r13
- cfi_adjust_cfa_offset(8)
+.Lpush_r13:
pushq %r14
- cfi_adjust_cfa_offset(8)
+.Lpush_r14:
subq $24, %rsp
- cfi_adjust_cfa_offset(24)
+.Lsubq:
movq %rdi, %r12
- cfi_offset(12, -16) /* %r12 */
movq %rsi, %r13
- cfi_offset(13, -24) /* %r13 */
/* Check for invalid nanosecond field. */
cmpq $1000000000, 8(%r13)
movl $EINVAL, %r14d
- cfi_offset(14, -24) /* %r14 */
jae 6f
+ LOCK
+ addq $1, NWAITERS(%r12)
+
7: xorl %esi, %esi
movq %rsp, %rdi
movq $VSYSCALL_ADDR_vgettimeofday, %rax
@@ -96,12 +106,22 @@ sem_timedwait:
movq %rdi, (%rsp) /* Store relative timeout. */
movq %rsi, 8(%rsp)
+.LcleanupSTART:
call __pthread_enable_asynccancel
movl %eax, 16(%rsp)
movq %rsp, %r10
+#if VALUE == 0
movq %r12, %rdi
- xorl %esi, %esi
+#else
+ leaq VALUE(%r12), %rdi
+#endif
+#if FUTEX_WAIT == 0
+ movl PRIVATE(%rdi), %esi
+#else
+ movl $FUTEX_WAIT, %esi
+ orl PRIVATE(%rdi), %esi
+#endif
movl $SYS_futex, %eax
xorl %edx, %edx
syscall
@@ -109,39 +129,47 @@ sem_timedwait:
movl 16(%rsp), %edi
call __pthread_disable_asynccancel
+.LcleanupEND:
testq %r14, %r14
je 9f
cmpq $-EWOULDBLOCK, %r14
jne 3f
-9: movl (%r12), %eax
+9:
+#if VALUE == 0
+ movl (%r12), %eax
+#else
+ movl VALUE(%r12), %eax
+#endif
8: testl %eax, %eax
je 7b
leaq -1(%rax), %rcx
LOCK
+#if VALUE == 0
cmpxchgl %ecx, (%r12)
+#else
+ cmpxchgl %ecx, VALUE(%r12)
+#endif
jne 8b
xorl %eax, %eax
-10: addq $24, %rsp
- cfi_adjust_cfa_offset(-24)
+
+10: LOCK
+ subq $1, NWAITERS(%r12)
+
+ addq $24, %rsp
+.Laddq:
popq %r14
- cfi_adjust_cfa_offset(-8)
- cfi_restore(14)
+.Lpop_r14:
popq %r13
- cfi_adjust_cfa_offset(-8)
- cfi_restore(13)
+.Lpop_r13:
popq %r12
- cfi_adjust_cfa_offset(-8)
- cfi_restore(12)
+.Lpop_r12:
retq
- cfi_adjust_cfa_offset(48)
- cfi_offset(12, -16) /* %r12 */
- cfi_offset(13, -24) /* %r13 */
- cfi_offset(14, -32) /* %r14 */
+.Lafter_retq:
3: negq %r14
6:
#if USE___THREAD
@@ -154,5 +182,159 @@ sem_timedwait:
orl $-1, %eax
jmp 10b
- cfi_endproc
.size sem_timedwait,.-sem_timedwait
+
+
+ .type sem_timedwait_cleanup,@function
+sem_timedwait_cleanup:
+ LOCK
+ subq $1, NWAITERS(%r12)
+ movq %rax, %rdi
+.LcallUR:
+ call _Unwind_Resume@PLT
+ hlt
+.LENDCODE:
+ .size sem_timedwait_cleanup,.-sem_timedwait_cleanup
+
+
+ .section .gcc_except_table,"a",@progbits
+.LexceptSTART:
+ .byte 0xff # @LPStart format (omit)
+ .byte 0xff # @TType format (omit)
+ .byte 0x01 # call-site format
+ # DW_EH_PE_uleb128
+ .uleb128 .Lcstend-.Lcstbegin
+.Lcstbegin:
+ .uleb128 .LcleanupSTART-.LSTARTCODE
+ .uleb128 .LcleanupEND-.LcleanupSTART
+ .uleb128 sem_timedwait_cleanup-.LSTARTCODE
+ .uleb128 0
+ .uleb128 .LcallUR-.LSTARTCODE
+ .uleb128 .LENDCODE-.LcallUR
+ .uleb128 0
+ .uleb128 0
+.Lcstend:
+
+
+ .section .eh_frame,"a",@progbits
+.LSTARTFRAME:
+ .long .LENDCIE-.LSTARTCIE # Length of the CIE.
+.LSTARTCIE:
+ .long 0 # CIE ID.
+ .byte 1 # Version number.
+#ifdef SHARED
+ .string "zPLR" # NUL-terminated augmentation
+ # string.
+#else
+ .string "zPL" # NUL-terminated augmentation
+ # string.
+#endif
+ .uleb128 1 # Code alignment factor.
+ .sleb128 -8 # Data alignment factor.
+ .byte 16 # Return address register
+ # column.
+#ifdef SHARED
+ .uleb128 7 # Augmentation value length.
+ .byte 0x9b # Personality: DW_EH_PE_pcrel
+ # + DW_EH_PE_sdata4
+ # + DW_EH_PE_indirect
+ .long DW.ref.__gcc_personality_v0-.
+ .byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel
+ # + DW_EH_PE_sdata4.
+ .byte 0x1b # FDE Encoding: DW_EH_PE_pcrel
+ # + DW_EH_PE_sdata4.
+#else
+ .uleb128 10 # Augmentation value length.
+ .byte 0x0 # Personality: absolute
+ .quad __gcc_personality_v0
+ .byte 0x0 # LSDA Encoding: absolute
+#endif
+ .byte 0x0c # DW_CFA_def_cfa
+ .uleb128 7
+ .uleb128 8
+ .byte 0x90 # DW_CFA_offset, column 0x10
+ .uleb128 1
+ .align 8
+.LENDCIE:
+
+ .long .LENDFDE-.LSTARTFDE # Length of the FDE.
+.LSTARTFDE:
+ .long .LSTARTFDE-.LSTARTFRAME # CIE pointer.
+#ifdef SHARED
+ .long .LSTARTCODE-. # PC-relative start address
+ # of the code.
+ .long .LENDCODE-.LSTARTCODE # Length of the code.
+ .uleb128 4 # Augmentation size
+ .long .LexceptSTART-.
+#else
+ .quad .LSTARTCODE # Start address of the code.
+ .quad .LENDCODE-.LSTARTCODE # Length of the code.
+ .uleb128 8 # Augmentation size
+ .quad .LexceptSTART
+#endif
+
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpush_r12-.LSTARTCODE
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 16
+ .byte 0x8c # DW_CFA_offset %r12
+ .uleb128 2
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpush_r13-.Lpush_r12
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 24
+ .byte 0x8d # DW_CFA_offset %r13
+ .uleb128 3
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpush_r14-.Lpush_r13
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 32
+ .byte 0x8e # DW_CFA_offset %r14
+ .uleb128 4
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lsubq-.Lpush_r14
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 56
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Laddq-.Lsubq
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 32
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpop_r14-.Laddq
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 24
+ .byte 0xce # DW_CFA_restore %r14
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpop_r13-.Lpop_r14
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 16
+ .byte 0xcd # DW_CFA_restore %r13
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lpop_r12-.Lpop_r13
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 8
+ .byte 0xcc # DW_CFA_restore %r12
+ .byte 4 # DW_CFA_advance_loc4
+ .long .Lafter_retq-.Lpop_r12
+ .byte 14 # DW_CFA_def_cfa_offset
+ .uleb128 56
+ .byte 0x8c # DW_CFA_offset %r12
+ .uleb128 2
+ .byte 0x8d # DW_CFA_offset %r13
+ .uleb128 3
+ .byte 0x8e # DW_CFA_offset %r14
+ .uleb128 4
+ .align 8
+.LENDFDE:
+
+
+#ifdef SHARED
+ .hidden DW.ref.__gcc_personality_v0
+ .weak DW.ref.__gcc_personality_v0
+ .section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
+ .align 8
+ .type DW.ref.__gcc_personality_v0, @object
+ .size DW.ref.__gcc_personality_v0, 8
+DW.ref.__gcc_personality_v0:
+ .quad __gcc_personality_v0
+#endif
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