diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S new file mode 100644 index 000000000..704a2223a --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S @@ -0,0 +1,379 @@ +/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <bits/kernel-features.h> +#include <lowlevellock.h> +#include <pthread-errnos.h> +#include <structsem.h> + + +/* For the calculation see asm/vsyscall.h. */ +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 + + .text + + .globl sem_timedwait + .type sem_timedwait,@function + .align 16 +sem_timedwait: +.LSTARTCODE: + cfi_startproc +#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 + retq + + /* Check whether the timeout value is valid. */ +1: cmpq $1000000000, 8(%rsi) + jae 6f + +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME +# ifdef __PIC__ + cmpl $0, __have_futex_clock_realtime(%rip) +# else + cmpl $0, __have_futex_clock_realtime +# endif + je .Lreltmo +#endif + + /* This push is only needed to store the sem_t pointer for the + exception handler. */ + pushq %rdi + cfi_adjust_cfa_offset(8) + + movq %rsi, %r10 + + LOCK + addq $1, NWAITERS(%rdi) + +.LcleanupSTART: +13: call __pthread_enable_asynccancel + movl %eax, %r8d + +#if VALUE != 0 + leaq VALUE(%rdi), %rdi +#endif + movl $0xffffffff, %r9d + movl $FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, %esi + orl PRIVATE(%rdi), %esi + movl $SYS_futex, %eax + xorl %edx, %edx + syscall + movq %rax, %r9 +#if VALUE != 0 + leaq -VALUE(%rdi), %rdi +#endif + + xchgq %r8, %rdi + call __pthread_disable_asynccancel +.LcleanupEND: + movq %r8, %rdi + + testq %r9, %r9 + je 11f + cmpq $-EWOULDBLOCK, %r9 + jne 3f + +11: +#if VALUE == 0 + movl (%rdi), %eax +#else + movl VALUE(%rdi), %eax +#endif +14: testl %eax, %eax + je 13b + + leaq -1(%rax), %rcx + LOCK +#if VALUE == 0 + cmpxchgl %ecx, (%rdi) +#else + cmpxchgl %ecx, VALUE(%rdi) +#endif + jne 14b + + xorl %eax, %eax + +15: LOCK + subq $1, NWAITERS(%rdi) + + leaq 8(%rsp), %rsp + cfi_adjust_cfa_offset(-8) + retq + + cfi_adjust_cfa_offset(8) +3: negq %r9 +#if USE___THREAD + movq errno@gottpoff(%rip), %rdx + movl %r9d, %fs:(%rdx) +#else + callq __errno_location@plt + movl %r9d, (%rax) +#endif + + orl $-1, %eax + jmp 15b + + cfi_adjust_cfa_offset(-8) +6: +#if USE___THREAD + movq errno@gottpoff(%rip), %rdx + movl $EINVAL, %fs:(%rdx) +#else + callq __errno_location@plt + movl $EINVAL, (%rax) +#endif + + orl $-1, %eax + + retq + +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME +.Lreltmo: + pushq %r12 + cfi_adjust_cfa_offset(8) + cfi_rel_offset(%r12, 0) + pushq %r13 + cfi_adjust_cfa_offset(8) + cfi_rel_offset(%r13, 0) + pushq %r14 + cfi_adjust_cfa_offset(8) + cfi_rel_offset(%r14, 0) + +#ifdef __ASSUME_FUTEX_CLOCK_REALTIME +# define STACKFRAME 8 +#else +# define STACKFRAME 24 +#endif + subq $STACKFRAME, %rsp + cfi_adjust_cfa_offset(STACKFRAME) + + movq %rdi, %r12 + movq %rsi, %r13 + + LOCK + addq $1, NWAITERS(%r12) + +7: xorl %esi, %esi + movq %rsp, %rdi + movq $VSYSCALL_ADDR_vgettimeofday, %rax + callq *%rax + + /* Compute relative timeout. */ + movq 8(%rsp), %rax + movl $1000, %edi + mul %rdi /* Milli seconds to nano seconds. */ + movq (%r13), %rdi + movq 8(%r13), %rsi + subq (%rsp), %rdi + subq %rax, %rsi + jns 5f + addq $1000000000, %rsi + decq %rdi +5: testq %rdi, %rdi + movl $ETIMEDOUT, %r14d + js 36f /* Time is already up. */ + + movq %rdi, (%rsp) /* Store relative timeout. */ + movq %rsi, 8(%rsp) + +.LcleanupSTART2: + call __pthread_enable_asynccancel + movl %eax, 16(%rsp) + + movq %rsp, %r10 +# if VALUE == 0 + movq %r12, %rdi +# 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 + movq %rax, %r14 + + movl 16(%rsp), %edi + call __pthread_disable_asynccancel +.LcleanupEND2: + + testq %r14, %r14 + je 9f + cmpq $-EWOULDBLOCK, %r14 + jne 33f + +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 + +45: LOCK + subq $1, NWAITERS(%r12) + + addq $STACKFRAME, %rsp + cfi_adjust_cfa_offset(-STACKFRAME) + 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) + retq + + cfi_adjust_cfa_offset(STACKFRAME + 3 * 8) + cfi_rel_offset(%r12, STACKFRAME + 2 * 8) + cfi_rel_offset(%r13, STACKFRAME + 1 * 8) + cfi_rel_offset(%r14, STACKFRAME) +33: negq %r14 +36: +#if USE___THREAD + movq errno@gottpoff(%rip), %rdx + movl %r14d, %fs:(%rdx) +#else + callq __errno_location@plt + movl %r14d, (%rax) +#endif + + orl $-1, %eax + jmp 45b +#endif + cfi_endproc + .size sem_timedwait,.-sem_timedwait + + + .type sem_timedwait_cleanup,@function +sem_timedwait_cleanup: + cfi_startproc + cfi_adjust_cfa_offset(8) + + movq (%rsp), %rdi + LOCK + subq $1, NWAITERS(%rdi) + movq %rax, %rdi +.LcallUR: + call _Unwind_Resume@PLT + hlt +.LENDCODE: + cfi_endproc + .size sem_timedwait_cleanup,.-sem_timedwait_cleanup + + +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME + .type sem_timedwait_cleanup2,@function +sem_timedwait_cleanup2: + cfi_startproc + cfi_adjust_cfa_offset(STACKFRAME + 3 * 8) + cfi_rel_offset(%r12, STACKFRAME + 2 * 8) + cfi_rel_offset(%r13, STACKFRAME + 1 * 8) + cfi_rel_offset(%r14, STACKFRAME) + + LOCK + subq $1, NWAITERS(%r12) + movq %rax, %rdi + movq STACKFRAME(%rsp), %r14 + movq STACKFRAME+8(%rsp), %r13 + movq STACKFRAME+16(%rsp), %r12 +.LcallUR2: + call _Unwind_Resume@PLT + hlt +.LENDCODE2: + cfi_endproc + .size sem_timedwait_cleanup2,.-sem_timedwait_cleanup2 +#endif + + + .section .gcc_except_table,"a",@progbits +.LexceptSTART: + .byte DW_EH_PE_omit # @LPStart format + .byte DW_EH_PE_omit # @TType format + .byte DW_EH_PE_uleb128 # call-site format + .uleb128 .Lcstend-.Lcstbegin +.Lcstbegin: + .uleb128 .LcleanupSTART-.LSTARTCODE + .uleb128 .LcleanupEND-.LcleanupSTART + .uleb128 sem_timedwait_cleanup-.LSTARTCODE + .uleb128 0 +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME + .uleb128 .LcleanupSTART2-.LSTARTCODE + .uleb128 .LcleanupEND2-.LcleanupSTART2 + .uleb128 sem_timedwait_cleanup2-.LSTARTCODE + .uleb128 0 +#endif + .uleb128 .LcallUR-.LSTARTCODE + .uleb128 .LENDCODE-.LcallUR + .uleb128 0 + .uleb128 0 +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME + .uleb128 .LcallUR2-.LSTARTCODE + .uleb128 .LENDCODE2-.LcallUR2 + .uleb128 0 + .uleb128 0 +#endif +.Lcstend: + + +#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 |