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0068c08588
Since __ASSUME_PRIVATE_FUTEX is always defined, this patch removes the !__ASSUME_PRIVATE_FUTEX paths. Tested with build-many-glibcs.py. * nptl/allocatestack.c (allocate_stack): Remove the !__ASSUME_PRIVATE_FUTEX paths. * nptl/descr.h (header): Remove the !__ASSUME_PRIVATE_FUTEX path. * nptl/nptl-init.c (__pthread_initialize_minimal_internal): Likewise. * sysdeps/i386/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Removed. * sysdeps/powerpc/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/sh/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/x86_64/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/i386/nptl/tls.h: (tcbhead_t): Remve the !__ASSUME_PRIVATE_FUTEX path. * sysdeps/s390/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/sparc/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/x86_64/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.S: Remove the !__ASSUME_PRIVATE_FUTEX macros. * sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/cancellation.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_PRIVATE_FUTEX): Removed.
432 lines
8.4 KiB
ArmAsm
432 lines
8.4 KiB
ArmAsm
/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <pthread-errnos.h>
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#include <kernel-features.h>
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#include <lowlevellock.h>
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#include <stap-probe.h>
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.text
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#define LOAD_PRIVATE_FUTEX_WAIT(reg) \
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movl $(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg
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#define LOAD_PRIVATE_FUTEX_WAKE(reg) \
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movl $(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg
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#define LOAD_FUTEX_WAIT(reg) \
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xorl $(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg
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#define LOAD_FUTEX_WAIT_ABS(reg) \
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xorl $(FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME), reg
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#define LOAD_FUTEX_WAKE(reg) \
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xorl $(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg
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.globl __lll_lock_wait_private
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.type __lll_lock_wait_private,@function
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.hidden __lll_lock_wait_private
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.align 16
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__lll_lock_wait_private:
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cfi_startproc
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pushq %r10
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cfi_adjust_cfa_offset(8)
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pushq %rdx
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cfi_adjust_cfa_offset(8)
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cfi_offset(%r10, -16)
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cfi_offset(%rdx, -24)
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xorq %r10, %r10 /* No timeout. */
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movl $2, %edx
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LOAD_PRIVATE_FUTEX_WAIT (%esi)
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cmpl %edx, %eax /* NB: %edx == 2 */
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jne 2f
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1: LIBC_PROBE (lll_lock_wait_private, 1, %rdi)
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movl $SYS_futex, %eax
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syscall
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2: movl %edx, %eax
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xchgl %eax, (%rdi) /* NB: lock is implied */
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testl %eax, %eax
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jnz 1b
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popq %rdx
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rdx)
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popq %r10
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r10)
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retq
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cfi_endproc
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.size __lll_lock_wait_private,.-__lll_lock_wait_private
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#if !IS_IN (libc)
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.globl __lll_lock_wait
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.type __lll_lock_wait,@function
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.hidden __lll_lock_wait
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.align 16
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__lll_lock_wait:
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cfi_startproc
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pushq %r10
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cfi_adjust_cfa_offset(8)
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pushq %rdx
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cfi_adjust_cfa_offset(8)
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cfi_offset(%r10, -16)
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cfi_offset(%rdx, -24)
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xorq %r10, %r10 /* No timeout. */
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movl $2, %edx
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LOAD_FUTEX_WAIT (%esi)
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cmpl %edx, %eax /* NB: %edx == 2 */
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jne 2f
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1: LIBC_PROBE (lll_lock_wait, 2, %rdi, %rsi)
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movl $SYS_futex, %eax
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syscall
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2: movl %edx, %eax
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xchgl %eax, (%rdi) /* NB: lock is implied */
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testl %eax, %eax
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jnz 1b
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popq %rdx
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rdx)
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popq %r10
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r10)
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retq
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cfi_endproc
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.size __lll_lock_wait,.-__lll_lock_wait
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/* %rdi: futex
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%rsi: flags
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%rdx: timeout
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%eax: futex value
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*/
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.globl __lll_timedlock_wait
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.type __lll_timedlock_wait,@function
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.hidden __lll_timedlock_wait
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.align 16
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__lll_timedlock_wait:
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cfi_startproc
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# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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# ifdef PIC
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cmpl $0, __have_futex_clock_realtime(%rip)
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# else
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cmpl $0, __have_futex_clock_realtime
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# endif
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je .Lreltmo
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# endif
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cmpq $0, (%rdx)
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js 5f
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pushq %r9
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cfi_adjust_cfa_offset(8)
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cfi_rel_offset(%r9, 0)
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movq %rdx, %r10
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movl $0xffffffff, %r9d
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LOAD_FUTEX_WAIT_ABS (%esi)
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movl $2, %edx
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cmpl %edx, %eax
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jne 2f
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1: movl $SYS_futex, %eax
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movl $2, %edx
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syscall
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2: xchgl %edx, (%rdi) /* NB: lock is implied */
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testl %edx, %edx
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jz 3f
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cmpl $-ETIMEDOUT, %eax
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je 4f
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cmpl $-EINVAL, %eax
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jne 1b
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4: movl %eax, %edx
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negl %edx
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3: movl %edx, %eax
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popq %r9
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r9)
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retq
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5: movl $ETIMEDOUT, %eax
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retq
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# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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.Lreltmo:
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/* Check for a valid timeout value. */
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cmpq $1000000000, 8(%rdx)
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jae 3f
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pushq %r8
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cfi_adjust_cfa_offset(8)
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pushq %r9
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cfi_adjust_cfa_offset(8)
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pushq %r12
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cfi_adjust_cfa_offset(8)
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pushq %r13
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cfi_adjust_cfa_offset(8)
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pushq %r14
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cfi_adjust_cfa_offset(8)
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cfi_offset(%r8, -16)
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cfi_offset(%r9, -24)
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cfi_offset(%r12, -32)
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cfi_offset(%r13, -40)
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cfi_offset(%r14, -48)
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pushq %rsi
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cfi_adjust_cfa_offset(8)
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/* Stack frame for the timespec and timeval structs. */
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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movq %rdi, %r12
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movq %rdx, %r13
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movl $2, %edx
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xchgl %edx, (%r12)
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testl %edx, %edx
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je 6f
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1:
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/* Get current time. */
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movq %rsp, %rdi
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xorl %esi, %esi
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/* This call works because we directly jump to a system call entry
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which preserves all the registers. */
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call JUMPTARGET(__gettimeofday)
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/* Compute relative timeout. */
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movq 8(%rsp), %rax
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movl $1000, %edi
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mul %rdi /* Milli seconds to nano seconds. */
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movq (%r13), %rdi
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movq 8(%r13), %rsi
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subq (%rsp), %rdi
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subq %rax, %rsi
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jns 4f
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addq $1000000000, %rsi
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decq %rdi
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4: testq %rdi, %rdi
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js 2f /* Time is already up. */
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/* Store relative timeout. */
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movq %rdi, (%rsp)
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movq %rsi, 8(%rsp)
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/* Futex call. */
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movl $2, %edx
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movl $1, %eax
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movq %rsp, %r10
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movl 24(%rsp), %esi
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LOAD_FUTEX_WAIT (%esi)
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movq %r12, %rdi
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movl $SYS_futex, %eax
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syscall
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/* NB: %edx == 2 */
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xchgl %edx, (%r12)
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testl %edx, %edx
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je 6f
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cmpl $-ETIMEDOUT, %eax
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jne 1b
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2: movl $ETIMEDOUT, %edx
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6: addq $32, %rsp
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cfi_adjust_cfa_offset(-32)
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popq %r14
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r14)
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popq %r13
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r13)
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popq %r12
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r12)
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popq %r9
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r9)
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popq %r8
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r8)
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movl %edx, %eax
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retq
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3: movl $EINVAL, %eax
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retq
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# endif
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cfi_endproc
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.size __lll_timedlock_wait,.-__lll_timedlock_wait
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#endif
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.globl __lll_unlock_wake_private
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.type __lll_unlock_wake_private,@function
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.hidden __lll_unlock_wake_private
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.align 16
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__lll_unlock_wake_private:
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cfi_startproc
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pushq %rsi
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cfi_adjust_cfa_offset(8)
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pushq %rdx
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cfi_adjust_cfa_offset(8)
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cfi_offset(%rsi, -16)
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cfi_offset(%rdx, -24)
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movl $0, (%rdi)
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LOAD_PRIVATE_FUTEX_WAKE (%esi)
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movl $1, %edx /* Wake one thread. */
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movl $SYS_futex, %eax
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syscall
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popq %rdx
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rdx)
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popq %rsi
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rsi)
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retq
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cfi_endproc
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.size __lll_unlock_wake_private,.-__lll_unlock_wake_private
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#if !IS_IN (libc)
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.globl __lll_unlock_wake
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.type __lll_unlock_wake,@function
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.hidden __lll_unlock_wake
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.align 16
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__lll_unlock_wake:
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cfi_startproc
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pushq %rsi
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cfi_adjust_cfa_offset(8)
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pushq %rdx
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cfi_adjust_cfa_offset(8)
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cfi_offset(%rsi, -16)
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cfi_offset(%rdx, -24)
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movl $0, (%rdi)
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LOAD_FUTEX_WAKE (%esi)
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movl $1, %edx /* Wake one thread. */
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movl $SYS_futex, %eax
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syscall
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popq %rdx
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rdx)
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popq %rsi
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%rsi)
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retq
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cfi_endproc
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.size __lll_unlock_wake,.-__lll_unlock_wake
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.globl __lll_timedwait_tid
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.type __lll_timedwait_tid,@function
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.hidden __lll_timedwait_tid
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.align 16
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__lll_timedwait_tid:
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cfi_startproc
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pushq %r12
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cfi_adjust_cfa_offset(8)
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pushq %r13
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cfi_adjust_cfa_offset(8)
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cfi_offset(%r12, -16)
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cfi_offset(%r13, -24)
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movq %rdi, %r12
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movq %rsi, %r13
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/* Align stack to 16 bytes when calling __gettimeofday. */
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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/* Get current time. */
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2: movq %rsp, %rdi
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xorl %esi, %esi
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/* This call works because we directly jump to a system call entry
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which preserves all the registers. */
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call JUMPTARGET(__gettimeofday)
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/* Compute relative timeout. */
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movq 8(%rsp), %rax
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movl $1000, %edi
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mul %rdi /* Milli seconds to nano seconds. */
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movq (%r13), %rdi
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movq 8(%r13), %rsi
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subq (%rsp), %rdi
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subq %rax, %rsi
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jns 5f
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addq $1000000000, %rsi
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decq %rdi
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5: testq %rdi, %rdi
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js 6f /* Time is already up. */
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movq %rdi, (%rsp) /* Store relative timeout. */
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movq %rsi, 8(%rsp)
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movl (%r12), %edx
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testl %edx, %edx
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jz 4f
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movq %rsp, %r10
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/* XXX The kernel so far uses global futex for the wakeup at
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all times. */
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#if FUTEX_WAIT == 0
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xorl %esi, %esi
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#else
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movl $FUTEX_WAIT, %esi
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#endif
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movq %r12, %rdi
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movl $SYS_futex, %eax
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syscall
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cmpl $0, (%rdi)
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jne 1f
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4: xorl %eax, %eax
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8: addq $24, %rsp
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cfi_adjust_cfa_offset(-24)
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popq %r13
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r13)
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popq %r12
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r12)
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retq
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cfi_adjust_cfa_offset(32)
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1: cmpq $-ETIMEDOUT, %rax
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jne 2b
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6: movl $ETIMEDOUT, %eax
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jmp 8b
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cfi_endproc
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.size __lll_timedwait_tid,.-__lll_timedwait_tid
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#endif
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