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/* Copyright (C) 2002-2015 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 <shlib-compat.h>
#include <pthread-errnos.h>
#include <structsem.h>
#include <lowlevellock.h>
#if VALUE != 0
# error "code needs to be rewritten for VALUE != 0"
#endif
.text
.globl __new_sem_wait
.type __new_sem_wait,@function
.align 16
__new_sem_wait:
.LSTARTCODE:
pushl %ebx
.Lpush_ebx:
pushl %esi
.Lpush_esi:
subl $4, %esp
.Lsub_esp:
movl 16(%esp), %ebx
movl (%ebx), %eax
2: testl %eax, %eax
je 1f
leal -1(%eax), %edx
LOCK
cmpxchgl %edx, (%ebx)
jne 2b
7: xorl %eax, %eax
9: movl 4(%esp), %esi
movl 8(%esp), %ebx
addl $12, %esp
.Ladd_esp:
ret
.Lafter_ret:
1: LOCK
incl NWAITERS(%ebx)
.LcleanupSTART:
6: call __pthread_enable_asynccancel
movl %eax, (%esp)
#if FUTEX_WAIT == 0
movl PRIVATE(%ebx), %ecx
#else
movl $FUTEX_WAIT, %ecx
orl PRIVATE(%ebx), %ecx
#endif
xorl %esi, %esi
xorl %edx, %edx
movl $SYS_futex, %eax
ENTER_KERNEL
movl %eax, %esi
movl (%esp), %eax
call __pthread_disable_asynccancel
.LcleanupEND:
testl %esi, %esi
je 3f
cmpl $-EWOULDBLOCK, %esi
jne 4f
3:
movl (%ebx), %eax
5: testl %eax, %eax
je 6b
leal -1(%eax), %edx
LOCK
cmpxchgl %edx, (%ebx)
jne 5b
LOCK
decl NWAITERS(%ebx)
jmp 7b
4: LOCK
decl NWAITERS(%ebx)
negl %esi
#ifdef PIC
SETUP_PIC_REG(bx)
#else
movl $8f, %ebx
8:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#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
orl $-1, %eax
jmp 9b
.size __new_sem_wait,.-__new_sem_wait
versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1)
.type sem_wait_cleanup,@function
sem_wait_cleanup:
LOCK
decl NWAITERS(%ebx)
movl %eax, (%esp)
.LcallUR:
call _Unwind_Resume@PLT
hlt
.LENDCODE:
.size sem_wait_cleanup,.-sem_wait_cleanup
.section .gcc_except_table,"a",@progbits
.LexceptSTART:
.byte 0xff # @LPStart format (omit)
.byte 0xff # @TType format (omit)
.byte 0x01 # call-site format
# DW_EH_PE_uleb128
.uleb128 .Lcstend-.Lcstbegin
.Lcstbegin:
.uleb128 .LcleanupSTART-.LSTARTCODE
.uleb128 .LcleanupEND-.LcleanupSTART
.uleb128 sem_wait_cleanup-.LSTARTCODE
.uleb128 0
.uleb128 .LcallUR-.LSTARTCODE
.uleb128 .LENDCODE-.LcallUR
.uleb128 0
.uleb128 0
.Lcstend:
.section .eh_frame,"a",@progbits
.LSTARTFRAME:
.long .LENDCIE-.LSTARTCIE # Length of the CIE.
.LSTARTCIE:
.long 0 # CIE ID.
.byte 1 # Version number.
#ifdef SHARED
.string "zPLR" # NUL-terminated augmentation
# string.
#else
.string "zPL" # NUL-terminated augmentation
# string.
#endif
.uleb128 1 # Code alignment factor.
.sleb128 -4 # Data alignment factor.
.byte 8 # Return address register
# column.
#ifdef SHARED
.uleb128 7 # Augmentation value length.
.byte 0x9b # Personality: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4
# + DW_EH_PE_indirect
.long DW.ref.__gcc_personality_v0-.
.byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4.
.byte 0x1b # FDE Encoding: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4.
#else
.uleb128 6 # Augmentation value length.
.byte 0x0 # Personality: absolute
.long __gcc_personality_v0
.byte 0x0 # LSDA Encoding: absolute
#endif
.byte 0x0c # DW_CFA_def_cfa
.uleb128 4
.uleb128 4
.byte 0x88 # DW_CFA_offset, column 0x10
.uleb128 1
.align 4
.LENDCIE:
.long .LENDFDE-.LSTARTFDE # Length of the FDE.
.LSTARTFDE:
.long .LSTARTFDE-.LSTARTFRAME # CIE pointer.
#ifdef SHARED
.long .LSTARTCODE-. # PC-relative start address
# of the code.
#else
.long .LSTARTCODE # Start address of the code.
#endif
.long .LENDCODE-.LSTARTCODE # Length of the code.
.uleb128 4 # Augmentation size
#ifdef SHARED
.long .LexceptSTART-.
#else
.long .LexceptSTART
#endif
.byte 4 # DW_CFA_advance_loc4
.long .Lpush_ebx-.LSTARTCODE
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 8
.byte 0x83 # DW_CFA_offset %ebx
.uleb128 2
.byte 4 # DW_CFA_advance_loc4
.long .Lpush_esi-.Lpush_ebx
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 12
.byte 0x86 # DW_CFA_offset %esi
.uleb128 3
.byte 4 # DW_CFA_advance_loc4
.long .Lsub_esp-.Lpush_esi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 16
.byte 4 # DW_CFA_advance_loc4
.long .Ladd_esp-.Lsub_esp
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 4
.byte 0xc3 # DW_CFA_restore %ebx
.byte 0xc6 # DW_CFA_restore %esi
.byte 4 # DW_CFA_advance_loc4
.long .Lafter_ret-.Ladd_esp
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 16
.byte 0x83 # DW_CFA_offset %ebx
.uleb128 2
.byte 0x86 # DW_CFA_offset %esi
.uleb128 3
.align 4
.LENDFDE:
#ifdef SHARED
.hidden DW.ref.__gcc_personality_v0
.weak DW.ref.__gcc_personality_v0
.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
.align 4
.type DW.ref.__gcc_personality_v0, @object
.size DW.ref.__gcc_personality_v0, 4
DW.ref.__gcc_personality_v0:
.long __gcc_personality_v0
#endif
#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
.section ".text.compat", "ax"
.global __old_sem_wait
.type __old_sem_wait,@function
.align 16
cfi_startproc
__old_sem_wait:
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(ebx, -8)
cfi_offset(esi, -12)
3: movl (%ebx), %eax
2: testl %eax, %eax
je 1f
leal -1(%eax), %edx
LOCK
cmpxchgl %edx, (%ebx)
jne 2b
xorl %eax, %eax
5: movl 4(%esp), %esi
movl 8(%esp), %ebx
addl $12, %esp
cfi_restore(ebx)
cfi_restore(esi)
cfi_adjust_cfa_offset(-12)
ret
cfi_adjust_cfa_offset(12)
cfi_offset(ebx, -8)
cfi_offset(esi, -12)
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
SETUP_PIC_REG(bx)
#else
movl $4f, %ebx
4:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#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
orl $-1, %eax
jmp 5b
cfi_endproc
.size __old_sem_wait,.-__old_sem_wait
compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0)
#endif
|
