diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S deleted file mode 100644 index f2dca070f3..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ /dev/null @@ -1,462 +0,0 @@ -/* Copyright (C) 2002-2014 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 <kernel-features.h> -#include <lowlevellock.h> - -#include <stap-probe.h> - - .text - -#ifdef __ASSUME_PRIVATE_FUTEX -# define LOAD_PRIVATE_FUTEX_WAIT(reg) \ - movl $(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg -# define LOAD_PRIVATE_FUTEX_WAKE(reg) \ - movl $(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg -# 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 -# define LOAD_FUTEX_WAKE(reg) \ - xorl $(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg -#else -# if FUTEX_WAIT == 0 -# define LOAD_PRIVATE_FUTEX_WAIT(reg) \ - movl %fs:PRIVATE_FUTEX, reg -# else -# define LOAD_PRIVATE_FUTEX_WAIT(reg) \ - movl %fs:PRIVATE_FUTEX, reg ; \ - orl $FUTEX_WAIT, reg -# endif -# define LOAD_PRIVATE_FUTEX_WAKE(reg) \ - movl %fs:PRIVATE_FUTEX, reg ; \ - orl $FUTEX_WAKE, reg -# 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 -# define LOAD_FUTEX_WAKE(reg) \ - xorl $FUTEX_PRIVATE_FLAG, reg ; \ - andl %fs:PRIVATE_FUTEX, reg ; \ - orl $FUTEX_WAKE, reg -#endif - - - .globl __lll_lock_wait_private - .type __lll_lock_wait_private,@function - .hidden __lll_lock_wait_private - .align 16 -__lll_lock_wait_private: - 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. */ - movl $2, %edx - LOAD_PRIVATE_FUTEX_WAIT (%esi) - - cmpl %edx, %eax /* NB: %edx == 2 */ - jne 2f - -1: LIBC_PROBE (lll_lock_wait_private, 1, %rdi) - movl $SYS_futex, %eax - syscall - -2: movl %edx, %eax - xchgl %eax, (%rdi) /* NB: lock is implied */ - - testl %eax, %eax - jnz 1b - - 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_lock_wait_private,.-__lll_lock_wait_private - -#ifdef NOT_IN_libc - .globl __lll_lock_wait - .type __lll_lock_wait,@function - .hidden __lll_lock_wait - .align 16 -__lll_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. */ - movl $2, %edx - LOAD_FUTEX_WAIT (%esi) - - cmpl %edx, %eax /* NB: %edx == 2 */ - jne 2f - -1: LIBC_PROBE (lll_lock_wait, 2, %rdi, %rsi) - movl $SYS_futex, %eax - syscall - -2: movl %edx, %eax - xchgl %eax, (%rdi) /* NB: lock is implied */ - - testl %eax, %eax - jnz 1b - - 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_lock_wait,.-__lll_lock_wait - - /* %rdi: futex - %rsi: flags - %rdx: timeout - %eax: futex value - */ - .globl __lll_timedlock_wait - .type __lll_timedlock_wait,@function - .hidden __lll_timedlock_wait - .align 16 -__lll_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 5f - - pushq %r9 - cfi_adjust_cfa_offset(8) - cfi_rel_offset(%r9, 0) - - movq %rdx, %r10 - movl $0xffffffff, %r9d - LOAD_FUTEX_WAIT_ABS (%esi) - - movl $2, %edx - cmpl %edx, %eax - jne 2f - -1: movl $SYS_futex, %eax - movl $2, %edx - syscall - -2: xchgl %edx, (%rdi) /* NB: lock is implied */ - - testl %edx, %edx - jz 3f - - cmpl $-ETIMEDOUT, %eax - je 4f - cmpl $-EINVAL, %eax - jne 1b -4: movl %eax, %edx - negl %edx - -3: movl %edx, %eax - popq %r9 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r9) - retq - -5: 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) - pushq %r14 - cfi_adjust_cfa_offset(8) - cfi_offset(%r8, -16) - cfi_offset(%r9, -24) - cfi_offset(%r12, -32) - cfi_offset(%r13, -40) - cfi_offset(%r14, -48) - pushq %rsi - cfi_adjust_cfa_offset(8) - - /* Stack frame for the timespec and timeval structs. */ - subq $24, %rsp - cfi_adjust_cfa_offset(24) - - movq %rdi, %r12 - movq %rdx, %r13 - - movl $2, %edx - xchgl %edx, (%r12) - - testl %edx, %edx - je 6f - -1: - /* 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 2f /* Time is already up. */ - - /* Store relative timeout. */ - movq %rdi, (%rsp) - movq %rsi, 8(%rsp) - - /* Futex call. */ - movl $2, %edx - movl $1, %eax - movq %rsp, %r10 - movl 24(%rsp), %esi - LOAD_FUTEX_WAIT (%esi) - movq %r12, %rdi - movl $SYS_futex, %eax - syscall - - /* NB: %edx == 2 */ - xchgl %edx, (%r12) - - testl %edx, %edx - je 6f - - cmpl $-ETIMEDOUT, %eax - jne 1b -2: movl $ETIMEDOUT, %edx - -6: addq $32, %rsp - cfi_adjust_cfa_offset(-32) - 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) - popq %r9 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r9) - popq %r8 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r8) - movl %edx, %eax - retq - -3: movl $EINVAL, %eax - retq -# endif - cfi_endproc - .size __lll_timedlock_wait,.-__lll_timedlock_wait -#endif - - - .globl __lll_unlock_wake_private - .type __lll_unlock_wake_private,@function - .hidden __lll_unlock_wake_private - .align 16 -__lll_unlock_wake_private: - cfi_startproc - pushq %rsi - cfi_adjust_cfa_offset(8) - pushq %rdx - cfi_adjust_cfa_offset(8) - cfi_offset(%rsi, -16) - cfi_offset(%rdx, -24) - - movl $0, (%rdi) - LOAD_PRIVATE_FUTEX_WAKE (%esi) - movl $1, %edx /* Wake one thread. */ - movl $SYS_futex, %eax - syscall - - popq %rdx - cfi_adjust_cfa_offset(-8) - cfi_restore(%rdx) - popq %rsi - cfi_adjust_cfa_offset(-8) - cfi_restore(%rsi) - retq - cfi_endproc - .size __lll_unlock_wake_private,.-__lll_unlock_wake_private - -#ifdef NOT_IN_libc - .globl __lll_unlock_wake - .type __lll_unlock_wake,@function - .hidden __lll_unlock_wake - .align 16 -__lll_unlock_wake: - cfi_startproc - pushq %rsi - cfi_adjust_cfa_offset(8) - pushq %rdx - cfi_adjust_cfa_offset(8) - cfi_offset(%rsi, -16) - cfi_offset(%rdx, -24) - - movl $0, (%rdi) - LOAD_FUTEX_WAKE (%esi) - movl $1, %edx /* Wake one thread. */ - movl $SYS_futex, %eax - syscall - - popq %rdx - cfi_adjust_cfa_offset(-8) - cfi_restore(%rdx) - popq %rsi - cfi_adjust_cfa_offset(-8) - cfi_restore(%rsi) - retq - cfi_endproc - .size __lll_unlock_wake,.-__lll_unlock_wake - - .globl __lll_timedwait_tid - .type __lll_timedwait_tid,@function - .hidden __lll_timedwait_tid - .align 16 -__lll_timedwait_tid: - cfi_startproc - pushq %r12 - cfi_adjust_cfa_offset(8) - pushq %r13 - cfi_adjust_cfa_offset(8) - cfi_offset(%r12, -16) - cfi_offset(%r13, -24) - - movq %rdi, %r12 - movq %rsi, %r13 - - subq $16, %rsp - cfi_adjust_cfa_offset(16) - - /* Get current time. */ -2: 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 5f - addq $1000000000, %rsi - decq %rdi -5: testq %rdi, %rdi - js 6f /* Time is already up. */ - - movq %rdi, (%rsp) /* Store relative timeout. */ - movq %rsi, 8(%rsp) - - movl (%r12), %edx - testl %edx, %edx - jz 4f - - movq %rsp, %r10 - /* XXX The kernel so far uses global futex for the wakeup at - all times. */ -#if FUTEX_WAIT == 0 - xorl %esi, %esi -#else - movl $FUTEX_WAIT, %esi -#endif - movq %r12, %rdi - movl $SYS_futex, %eax - syscall - - cmpl $0, (%rdi) - jne 1f -4: xorl %eax, %eax - -8: addq $16, %rsp - cfi_adjust_cfa_offset(-16) - 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(32) -1: cmpq $-ETIMEDOUT, %rax - jne 2b - -6: movl $ETIMEDOUT, %eax - jmp 8b - cfi_endproc - .size __lll_timedwait_tid,.-__lll_timedwait_tid -#endif |