mirror of
https://sourceware.org/git/glibc.git
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344 lines
7.0 KiB
ArmAsm
344 lines
7.0 KiB
ArmAsm
/* Copyright (C) 2002-2003, 2005, 2007, 2011-2012 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 <shlib-compat.h>
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#include <pthread-errnos.h>
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#include <structsem.h>
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#include <lowlevellock.h>
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#if VALUE != 0
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# error "code needs to be rewritten for VALUE != 0"
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#endif
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.text
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.globl __new_sem_wait
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.type __new_sem_wait,@function
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.align 16
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__new_sem_wait:
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.LSTARTCODE:
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pushl %ebx
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.Lpush_ebx:
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pushl %esi
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.Lpush_esi:
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subl $4, %esp
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.Lsub_esp:
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movl 16(%esp), %ebx
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movl (%ebx), %eax
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2: testl %eax, %eax
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je 1f
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%ebx)
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jne 2b
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7: xorl %eax, %eax
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9: movl 4(%esp), %esi
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movl 8(%esp), %ebx
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addl $12, %esp
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.Ladd_esp:
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ret
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.Lafter_ret:
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1: LOCK
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incl NWAITERS(%ebx)
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.LcleanupSTART:
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6: call __pthread_enable_asynccancel
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movl %eax, (%esp)
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#if FUTEX_WAIT == 0
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movl PRIVATE(%ebx), %ecx
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#else
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movl $FUTEX_WAIT, %ecx
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orl PRIVATE(%ebx), %ecx
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#endif
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xorl %esi, %esi
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xorl %edx, %edx
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movl $SYS_futex, %eax
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ENTER_KERNEL
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movl %eax, %esi
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movl (%esp), %eax
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call __pthread_disable_asynccancel
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.LcleanupEND:
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testl %esi, %esi
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je 3f
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cmpl $-EWOULDBLOCK, %esi
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jne 4f
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3:
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movl (%ebx), %eax
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5: testl %eax, %eax
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je 6b
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%ebx)
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jne 5b
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LOCK
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decl NWAITERS(%ebx)
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jmp 7b
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4: LOCK
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decl NWAITERS(%ebx)
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negl %esi
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#ifdef PIC
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SETUP_PIC_REG(bx)
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#else
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movl $8f, %ebx
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8:
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#endif
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addl $_GLOBAL_OFFSET_TABLE_, %ebx
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#ifdef NO_TLS_DIRECT_SEG_REFS
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movl errno@gotntpoff(%ebx), %edx
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addl %gs:0, %edx
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movl %esi, (%edx)
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#else
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movl errno@gotntpoff(%ebx), %edx
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movl %esi, %gs:(%edx)
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#endif
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orl $-1, %eax
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jmp 9b
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.size __new_sem_wait,.-__new_sem_wait
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versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1)
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.type sem_wait_cleanup,@function
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sem_wait_cleanup:
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LOCK
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decl NWAITERS(%ebx)
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movl %eax, (%esp)
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.LcallUR:
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call _Unwind_Resume@PLT
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hlt
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.LENDCODE:
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.size sem_wait_cleanup,.-sem_wait_cleanup
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.section .gcc_except_table,"a",@progbits
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.LexceptSTART:
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.byte 0xff # @LPStart format (omit)
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.byte 0xff # @TType format (omit)
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.byte 0x01 # call-site format
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# DW_EH_PE_uleb128
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.uleb128 .Lcstend-.Lcstbegin
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.Lcstbegin:
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.uleb128 .LcleanupSTART-.LSTARTCODE
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.uleb128 .LcleanupEND-.LcleanupSTART
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.uleb128 sem_wait_cleanup-.LSTARTCODE
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.uleb128 0
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.uleb128 .LcallUR-.LSTARTCODE
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.uleb128 .LENDCODE-.LcallUR
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.uleb128 0
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.uleb128 0
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.Lcstend:
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.section .eh_frame,"a",@progbits
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.LSTARTFRAME:
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.long .LENDCIE-.LSTARTCIE # Length of the CIE.
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.LSTARTCIE:
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.long 0 # CIE ID.
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.byte 1 # Version number.
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#ifdef SHARED
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.string "zPLR" # NUL-terminated augmentation
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# string.
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#else
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.string "zPL" # NUL-terminated augmentation
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# string.
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#endif
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.uleb128 1 # Code alignment factor.
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.sleb128 -4 # Data alignment factor.
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.byte 8 # Return address register
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# column.
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#ifdef SHARED
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.uleb128 7 # Augmentation value length.
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.byte 0x9b # Personality: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4
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# + DW_EH_PE_indirect
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.long DW.ref.__gcc_personality_v0-.
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.byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4.
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.byte 0x1b # FDE Encoding: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4.
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#else
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.uleb128 6 # Augmentation value length.
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.byte 0x0 # Personality: absolute
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.long __gcc_personality_v0
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.byte 0x0 # LSDA Encoding: absolute
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#endif
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.byte 0x0c # DW_CFA_def_cfa
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.uleb128 4
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.uleb128 4
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.byte 0x88 # DW_CFA_offset, column 0x10
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.uleb128 1
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.align 4
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.LENDCIE:
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.long .LENDFDE-.LSTARTFDE # Length of the FDE.
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.LSTARTFDE:
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.long .LSTARTFDE-.LSTARTFRAME # CIE pointer.
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#ifdef SHARED
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.long .LSTARTCODE-. # PC-relative start address
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# of the code.
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#else
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.long .LSTARTCODE # Start address of the code.
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#endif
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.long .LENDCODE-.LSTARTCODE # Length of the code.
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.uleb128 4 # Augmentation size
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#ifdef SHARED
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.long .LexceptSTART-.
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#else
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.long .LexceptSTART
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#endif
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpush_ebx-.LSTARTCODE
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 8
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.byte 0x83 # DW_CFA_offset %ebx
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.uleb128 2
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpush_esi-.Lpush_ebx
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 12
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.byte 0x86 # DW_CFA_offset %esi
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.uleb128 3
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.byte 4 # DW_CFA_advance_loc4
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.long .Lsub_esp-.Lpush_esi
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 16
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.byte 4 # DW_CFA_advance_loc4
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.long .Ladd_esp-.Lsub_esp
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 4
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.byte 0xc3 # DW_CFA_restore %ebx
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.byte 0xc6 # DW_CFA_restore %esi
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.byte 4 # DW_CFA_advance_loc4
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.long .Lafter_ret-.Ladd_esp
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 16
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.byte 0x83 # DW_CFA_offset %ebx
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.uleb128 2
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.byte 0x86 # DW_CFA_offset %esi
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.uleb128 3
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.align 4
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.LENDFDE:
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#ifdef SHARED
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.hidden DW.ref.__gcc_personality_v0
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.weak DW.ref.__gcc_personality_v0
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.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
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.align 4
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.type DW.ref.__gcc_personality_v0, @object
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.size DW.ref.__gcc_personality_v0, 4
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DW.ref.__gcc_personality_v0:
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.long __gcc_personality_v0
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#endif
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#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
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.section ".text.compat", "ax"
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.global __old_sem_wait
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.type __old_sem_wait,@function
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.align 16
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cfi_startproc
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__old_sem_wait:
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pushl %ebx
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cfi_adjust_cfa_offset(4)
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pushl %esi
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cfi_adjust_cfa_offset(4)
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subl $4, %esp
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cfi_adjust_cfa_offset(4)
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movl 16(%esp), %ebx
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cfi_offset(ebx, -8)
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cfi_offset(esi, -12)
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3: movl (%ebx), %eax
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2: testl %eax, %eax
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je 1f
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%ebx)
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jne 2b
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xorl %eax, %eax
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5: movl 4(%esp), %esi
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movl 8(%esp), %ebx
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addl $12, %esp
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cfi_restore(ebx)
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cfi_restore(esi)
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cfi_adjust_cfa_offset(-12)
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ret
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cfi_adjust_cfa_offset(12)
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cfi_offset(ebx, -8)
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cfi_offset(esi, -12)
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1: call __pthread_enable_asynccancel
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movl %eax, (%esp)
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xorl %esi, %esi
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movl $SYS_futex, %eax
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movl %esi, %ecx
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movl %esi, %edx
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ENTER_KERNEL
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movl %eax, %esi
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movl (%esp), %eax
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call __pthread_disable_asynccancel
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testl %esi, %esi
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je 3b
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cmpl $-EWOULDBLOCK, %esi
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je 3b
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negl %esi
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#ifdef PIC
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SETUP_PIC_REG(bx)
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#else
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movl $4f, %ebx
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4:
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#endif
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addl $_GLOBAL_OFFSET_TABLE_, %ebx
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#ifdef NO_TLS_DIRECT_SEG_REFS
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movl errno@gotntpoff(%ebx), %edx
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addl %gs:0, %edx
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movl %esi, (%edx)
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#else
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movl errno@gotntpoff(%ebx), %edx
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movl %esi, %gs:(%edx)
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#endif
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orl $-1, %eax
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jmp 5b
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cfi_endproc
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.size __old_sem_wait,.-__old_sem_wait
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compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0)
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#endif
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