diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S b/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S deleted file mode 100644 index b08d8992fd..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S +++ /dev/null @@ -1,306 +0,0 @@ -/* Copyright (C) 2002-2016 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <pthread-errnos.h> -#include <lowlevellock.h> -#include <lowlevelrobustlock.h> -#include <kernel-features.h> - - .text - -#define FUTEX_WAITERS 0x80000000 -#define FUTEX_OWNER_DIED 0x40000000 - -#ifdef __ASSUME_PRIVATE_FUTEX -# define LOAD_FUTEX_WAIT(reg) \ - xorl $(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg -# define LOAD_FUTEX_WAIT_ABS(reg) \ - xorl $(FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME), reg -#else -# if FUTEX_WAIT == 0 -# define LOAD_FUTEX_WAIT(reg) \ - xorl $FUTEX_PRIVATE_FLAG, reg ; \ - andl %fs:PRIVATE_FUTEX, reg -# else -# define LOAD_FUTEX_WAIT(reg) \ - xorl $FUTEX_PRIVATE_FLAG, reg ; \ - andl %fs:PRIVATE_FUTEX, reg ; \ - orl $FUTEX_WAIT, reg -# endif -# define LOAD_FUTEX_WAIT_ABS(reg) \ - xorl $FUTEX_PRIVATE_FLAG, reg ; \ - andl %fs:PRIVATE_FUTEX, reg ; \ - orl $FUTEX_WAIT_BITSET | FUTEX_CLOCK_REALTIME, reg -#endif - - - .globl __lll_robust_lock_wait - .type __lll_robust_lock_wait,@function - .hidden __lll_robust_lock_wait - .align 16 -__lll_robust_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. */ - LOAD_FUTEX_WAIT (%esi) - -4: movl %eax, %edx - orl $FUTEX_WAITERS, %edx - - testl $FUTEX_OWNER_DIED, %eax - jnz 3f - - cmpl %edx, %eax - je 1f - - LOCK - cmpxchgl %edx, (%rdi) - jnz 2f - -1: movl $SYS_futex, %eax - syscall - - movl (%rdi), %eax - -2: testl %eax, %eax - jne 4b - - movl %fs:TID, %edx - orl $FUTEX_WAITERS, %edx - LOCK - cmpxchgl %edx, (%rdi) - jnz 4b - /* 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_lock_wait,.-__lll_robust_lock_wait - - - .globl __lll_robust_timedlock_wait - .type __lll_robust_timedlock_wait,@function - .hidden __lll_robust_timedlock_wait - .align 16 -__lll_robust_timedlock_wait: - cfi_startproc -# 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 - - cmpq $0, (%rdx) - js 7f - - pushq %r9 - cfi_adjust_cfa_offset(8) - cfi_rel_offset(%r9, 0) - movq %rdx, %r10 - movl $0xffffffff, %r9d - LOAD_FUTEX_WAIT_ABS (%esi) - -1: testl $FUTEX_OWNER_DIED, %eax - jnz 3f - - movl %eax, %edx - orl $FUTEX_WAITERS, %edx - - cmpl %eax, %edx - je 5f - - LOCK - cmpxchgl %edx, (%rdi) - movq $0, %rcx /* Must use mov to avoid changing cc. */ - jnz 6f - -5: movl $SYS_futex, %eax - syscall - movl %eax, %ecx - - movl (%rdi), %eax - -6: testl %eax, %eax - jne 2f - - movl %fs:TID, %edx - orl $FUTEX_WAITERS, %edx - LOCK - cmpxchgl %edx, (%rdi) - jnz 2f - -3: popq %r9 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r9) - retq - - cfi_adjust_cfa_offset(8) - cfi_rel_offset(%r9, 0) - /* Check whether the time expired. */ -2: cmpl $-ETIMEDOUT, %ecx - je 4f - cmpl $-EINVAL, %ecx - jne 1b - -4: movl %ecx, %eax - negl %eax - jmp 3b - cfi_adjust_cfa_offset(-8) - cfi_restore(%r9) - -7: movl $ETIMEDOUT, %eax - retq - - -# ifndef __ASSUME_FUTEX_CLOCK_REALTIME -.Lreltmo: - /* 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) - pushq %rsi - cfi_adjust_cfa_offset(8) - - /* Stack frame for the timespec and timeval structs. */ - subq $32, %rsp - cfi_adjust_cfa_offset(32) - - movq %rdi, %r12 - movq %rdx, %r13 - -1: movq %rax, 16(%rsp) - - /* Get current time. */ - movq %rsp, %rdi - xorl %esi, %esi - /* This call works because we directly jump to a system call entry - which preserves all the registers. */ - call JUMPTARGET(__gettimeofday) - - /* 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 4f - addq $1000000000, %rsi - decq %rdi -4: testq %rdi, %rdi - js 8f /* Time is already up. */ - - /* Futex call. */ - movq %rdi, (%rsp) /* Store relative timeout. */ - movq %rsi, 8(%rsp) - - movq 16(%rsp), %rdx - movl %edx, %eax - orl $FUTEX_WAITERS, %edx - - testl $FUTEX_OWNER_DIED, %eax - jnz 6f - - cmpl %eax, %edx - je 2f - - LOCK - cmpxchgl %edx, (%r12) - movq $0, %rcx /* Must use mov to avoid changing cc. */ - jnz 5f - -2: movq %rsp, %r10 - movl 32(%rsp), %esi - LOAD_FUTEX_WAIT (%esi) - movq %r12, %rdi - movl $SYS_futex, %eax - syscall - movq %rax, %rcx - - movl (%r12), %eax - -5: testl %eax, %eax - jne 7f - - movl %fs:TID, %edx - orl $FUTEX_WAITERS, %edx - LOCK - cmpxchgl %edx, (%r12) - jnz 7f - -6: addq $40, %rsp - cfi_adjust_cfa_offset(-40) - 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(72) - cfi_offset(%r8, -16) - cfi_offset(%r9, -24) - cfi_offset(%r12, -32) - cfi_offset(%r13, -40) - /* Check whether the time expired. */ -7: cmpl $-ETIMEDOUT, %ecx - jne 1b - -8: movl $ETIMEDOUT, %eax - jmp 6b -#endif - cfi_endproc - .size __lll_robust_timedlock_wait,.-__lll_robust_timedlock_wait |