aboutsummaryrefslogtreecommitdiff
path: root/nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S
diff options
context:
space:
mode:
authorRoland McGrath <roland@hack.frob.com>2014-05-14 13:37:40 -0700
committerRoland McGrath <roland@hack.frob.com>2014-05-14 13:37:40 -0700
commit348f8e8c26178d7e5b7b64c16ab5c1a773916781 (patch)
treee155c8e2bbf1f549127d7b9a40ed33f7926e2b1c /nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S
parent5085af05bdfd7b4656abdd79e7da50022e3e1cad (diff)
downloadglibc-348f8e8c26178d7e5b7b64c16ab5c1a773916781.tar
glibc-348f8e8c26178d7e5b7b64c16ab5c1a773916781.tar.gz
glibc-348f8e8c26178d7e5b7b64c16ab5c1a773916781.tar.bz2
glibc-348f8e8c26178d7e5b7b64c16ab5c1a773916781.zip
Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S178
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)