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 | 175 |
1 files changed, 175 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..c44d3f5e7 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S @@ -0,0 +1,175 @@ +/* Copyright (C) 2002, 2003, 2005 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 <shlib-compat.h> +#include <pthread-errnos.h> + +#ifndef UP +# define LOCK lock +#else +# define +#endif + +#define SYS_futex 202 + +/* For the calculation see asm/vsyscall.h. */ +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 + + + .text + + .globl sem_timedwait + .type sem_timedwait,@function + .align 16 + cfi_startproc +sem_timedwait: + /* First check for cancellation. */ + movl %fs:CANCELHANDLING, %eax + andl $0xfffffff9, %eax + cmpl $8, %eax + je 11f + + movl (%rdi), %eax +2: testl %eax, %eax + je 1f + + leaq -1(%rax), %rdx + LOCK + cmpxchgl %edx, (%rdi) + jne 2b + + xorl %eax, %eax + retq + + /* Check whether the timeout value is valid. */ +1: pushq %r12 + cfi_adjust_cfa_offset(8) + pushq %r13 + cfi_adjust_cfa_offset(8) + pushq %r14 + cfi_adjust_cfa_offset(8) + subq $24, %rsp + cfi_adjust_cfa_offset(24) + + 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 + +7: call __pthread_enable_asynccancel + movl %eax, 16(%rsp) + + 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 6f /* Time is already up. */ + + movq %rdi, (%rsp) /* Store relative timeout. */ + movq %rsi, 8(%rsp) + + movq %rsp, %r10 + movq %r12, %rdi + xorl %esi, %esi + movl $SYS_futex, %eax + xorl %edx, %edx + syscall + movq %rax, %r14 + + movl 16(%rsp), %edi + call __pthread_disable_asynccancel + + testq %r14, %r14 + je 9f + cmpq $-EWOULDBLOCK, %r14 + jne 3f + +9: movl (%r12), %eax +8: testl %eax, %eax + je 7b + + leaq -1(%rax), %rcx + LOCK + cmpxchgl %ecx, (%r12) + jne 8b + + xorl %eax, %eax +10: addq $24, %rsp + cfi_adjust_cfa_offset(-24) + popq %r14 + cfi_adjust_cfa_offset(-8) + cfi_restore(14) + popq %r13 + cfi_adjust_cfa_offset(-8) + cfi_restore(13) + popq %r12 + cfi_adjust_cfa_offset(-8) + cfi_restore(12) + retq + + cfi_adjust_cfa_offset(48) + cfi_offset(12, -16) /* %r12 */ + cfi_offset(13, -24) /* %r13 */ + cfi_offset(14, -32) /* %r14 */ +3: negq %r14 +6: +#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 10b + cfi_adjust_cfa_offset(-48) + cfi_restore(14) + cfi_restore(13) + cfi_restore(12) + +11: /* Canceled. */ + movq $0xffffffffffffffff, %fs:RESULT + LOCK + orl $0x10, %fs:CANCELHANDLING + movq %fs:CLEANUP_JMP_BUF, %rdi + jmp HIDDEN_JUMPTARGET (__pthread_unwind) + cfi_endproc + .size sem_timedwait,.-sem_timedwait |