diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S new file mode 100644 index 000000000..053630617 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S @@ -0,0 +1,134 @@ +/* Copyright (C) 2002, 2003, 2005 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <pthread-errnos.h> +#include <tcb-offsets.h> +#include <tls.h> + +#ifndef UP +# define LOCK lock +#else +# define +#endif + +#define FUTEX_WAKE 1 + + + .text + + .globl __new_sem_wait + .type __new_sem_wait,@function + .align 16 + cfi_startproc +__new_sem_wait: + /* First check for cancellation. */ + movl %gs:CANCELHANDLING, %eax + andl $0xfffffff9, %eax + cmpl $8, %eax + je 5f + + pushl %ebx + cfi_adjust_cfa_offset(4) + pushl %esi + cfi_adjust_cfa_offset(4) + subl $4, %esp + cfi_adjust_cfa_offset(4) + + movl 16(%esp), %ebx + cfi_offset(3, -8) /* %ebx */ + + cfi_offset(6, -12) /* %esi */ +3: movl (%ebx), %eax +2: testl %eax, %eax + je,pn 1f + + leal -1(%eax), %edx + LOCK + cmpxchgl %edx, (%ebx) + jne,pn 2b + xorl %eax, %eax + + movl 4(%esp), %esi + cfi_restore(6) + movl 8(%esp), %ebx + cfi_restore(3) + addl $12, %esp + cfi_adjust_cfa_offset(-12) + ret + + cfi_adjust_cfa_offset(8) + cfi_offset(3, -8) /* %ebx */ + cfi_offset(6, -12) /* %esi */ +1: call __pthread_enable_asynccancel + movl %eax, (%esp) + + xorl %esi, %esi + movl $SYS_futex, %eax + movl %esi, %ecx + movl %esi, %edx + ENTER_KERNEL + movl %eax, %esi + + movl (%esp), %eax + call __pthread_disable_asynccancel + + testl %esi, %esi + je 3b + cmpl $-EWOULDBLOCK, %esi + je 3b + negl %esi +#ifdef PIC + call __x86.get_pc_thunk.bx +#else + movl $4f, %ebx +4: +#endif + addl $_GLOBAL_OFFSET_TABLE_, %ebx +#if USE___THREAD +# ifdef NO_TLS_DIRECT_SEG_REFS + movl errno@gotntpoff(%ebx), %edx + addl %gs:0, %edx + movl %esi, (%edx) +# else + movl errno@gotntpoff(%ebx), %edx + movl %esi, %gs:(%edx) +# endif +#else + call __errno_location@plt + movl %esi, (%eax) +#endif + orl $-1, %eax + movl 4(%esp), %esi + cfi_restore(6) + movl 8(%esp), %ebx + cfi_restore(3) + addl $12, %esp + cfi_adjust_cfa_offset(-12) + ret + +5: /* Canceled. */ + movl $0xffffffff, %gs:RESULT + LOCK + orl $0x10, %gs:CANCELHANDLING + movl %gs:CLEANUP_JMP_BUF, %eax + jmp HIDDEN_JUMPTARGET (__pthread_unwind) + cfi_endproc + .size __new_sem_wait,.-__new_sem_wait +weak_alias(__new_sem_wait, sem_wait) |