diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S b/nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S deleted file mode 100644 index dacd724d8b..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S +++ /dev/null @@ -1,178 +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 <unwindbuf.h> -#include <sysdep.h> -#include <kernel-features.h> -#include <lowlevellock.h> - - - .comm __fork_generation, 4, 4 - - .text - - - .globl __pthread_once - .type __pthread_once,@function - .align 16 - cfi_startproc -__pthread_once: - movl 4(%esp), %ecx - testl $2, (%ecx) - jz 1f - xorl %eax, %eax - ret - -1: pushl %ebx - cfi_adjust_cfa_offset (4) - cfi_rel_offset (3, 0) - pushl %esi - cfi_adjust_cfa_offset (4) - cfi_rel_offset (6, 0) - movl %ecx, %ebx - xorl %esi, %esi - - /* Not yet initialized or initialization in progress. - Get the fork generation counter now. */ -6: movl (%ebx), %eax -#ifdef PIC - LOAD_PIC_REG(cx) -#endif - -5: movl %eax, %edx - - testl $2, %eax - jnz 4f - - andl $3, %edx -#ifdef PIC - orl __fork_generation@GOTOFF(%ecx), %edx -#else - orl __fork_generation, %edx -#endif - orl $1, %edx - - LOCK - cmpxchgl %edx, (%ebx) - jnz 5b - - /* Check whether another thread already runs the initializer. */ - testl $1, %eax - jz 3f /* No -> do it. */ - - /* Check whether the initializer execution was interrupted - by a fork. */ - xorl %edx, %eax - testl $0xfffffffc, %eax - jnz 3f /* Different for generation -> run initializer. */ - - /* Somebody else got here first. Wait. */ -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_WAIT|FUTEX_PRIVATE_FLAG, %ecx -#else -# if FUTEX_WAIT == 0 - movl %gs:PRIVATE_FUTEX, %ecx -# else - movl $FUTEX_WAIT, %ecx - orl %gs:PRIVATE_FUTEX, %ecx -# endif -#endif - movl $SYS_futex, %eax - ENTER_KERNEL - jmp 6b - -3: /* Call the initializer function after setting up the - cancellation handler. Note that it is not possible here - to use the unwind-based cleanup handling. This would require - that the user-provided function and all the code it calls - is compiled with exceptions. Unfortunately this cannot be - guaranteed. */ - subl $UNWINDBUFSIZE+8, %esp - cfi_adjust_cfa_offset (UNWINDBUFSIZE+8) - movl %ecx, %ebx /* PIC register value. */ - - leal 8+UWJMPBUF(%esp), %eax - movl $0, 4(%esp) - movl %eax, (%esp) - call __sigsetjmp@PLT - testl %eax, %eax - jne 7f - - leal 8(%esp), %eax - call HIDDEN_JUMPTARGET(__pthread_register_cancel) - - /* Call the user-provided initialization function. */ - call *24+UNWINDBUFSIZE(%esp) - - /* Pop the cleanup handler. */ - leal 8(%esp), %eax - call HIDDEN_JUMPTARGET(__pthread_unregister_cancel) - addl $UNWINDBUFSIZE+8, %esp - cfi_adjust_cfa_offset (-UNWINDBUFSIZE-8) - - /* Sucessful run of the initializer. Signal that we are done. */ - movl 12(%esp), %ebx - LOCK - addl $1, (%ebx) - - /* Wake up all other threads. */ - movl $0x7fffffff, %edx -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_WAKE|FUTEX_PRIVATE_FLAG, %ecx -#else - movl $FUTEX_WAKE, %ecx - orl %gs:PRIVATE_FUTEX, %ecx -#endif - movl $SYS_futex, %eax - ENTER_KERNEL - -4: popl %esi - cfi_adjust_cfa_offset (-4) - cfi_restore (6) - popl %ebx - cfi_adjust_cfa_offset (-4) - cfi_restore (3) - xorl %eax, %eax - ret - -7: /* __sigsetjmp returned for the second time. */ - movl 20+UNWINDBUFSIZE(%esp), %ebx - cfi_adjust_cfa_offset (UNWINDBUFSIZE+16) - cfi_offset (3, -8) - cfi_offset (6, -12) - movl $0, (%ebx) - - movl $0x7fffffff, %edx -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_WAKE|FUTEX_PRIVATE_FLAG, %ecx -#else - movl $FUTEX_WAKE, %ecx - orl %gs:PRIVATE_FUTEX, %ecx -#endif - movl $SYS_futex, %eax - ENTER_KERNEL - - leal 8(%esp), %eax - call HIDDEN_JUMPTARGET (__pthread_unwind_next) - /* NOTREACHED */ - hlt - cfi_endproc - .size __pthread_once,.-__pthread_once - -hidden_def (__pthread_once) -strong_alias (__pthread_once, pthread_once) |