diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S | 266 |
1 files changed, 201 insertions, 65 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S index 972b49fac..218b12f9c 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -19,15 +19,13 @@ #include <sysdep.h> #include <pthread-errnos.h> -#include <tcb-offsets.h> +#include <structsem.h> +#include <lowlevellock.h> -#ifndef UP -# define LOCK lock -#else -# define -#endif -#define FUTEX_WAKE 1 +#if VALUE != 0 +# error "code needs to be rewritten for VALUE != 0" +#endif .text @@ -35,55 +33,46 @@ .globl sem_timedwait .type sem_timedwait,@function .align 16 - cfi_startproc sem_timedwait: - /* First check for cancellation. */ - movl %gs:CANCELHANDLING, %eax - andl $0xfffffff9, %eax - cmpl $8, %eax - je 10f - +.LSTARTCODE: movl 4(%esp), %ecx movl (%ecx), %eax 2: testl %eax, %eax - je,pn 1f + je 1f leal -1(%eax), %edx LOCK cmpxchgl %edx, (%ecx) - jne,pn 2b + jne 2b xorl %eax, %eax ret /* Check whether the timeout value is valid. */ 1: pushl %esi - cfi_adjust_cfa_offset(4) +.Lpush_esi: pushl %edi - cfi_adjust_cfa_offset(4) +.Lpush_edi: pushl %ebx - cfi_adjust_cfa_offset(4) +.Lpush_ebx: subl $12, %esp - cfi_adjust_cfa_offset(12) +.Lsub_esp: movl 32(%esp), %edi - cfi_offset(7, -12) /* %edi */ /* Check for invalid nanosecond field. */ cmpl $1000000000, 4(%edi) movl $EINVAL, %esi - cfi_offset(6, -8) /* %esi */ jae 6f - cfi_offset(3, -16) /* %ebx */ -7: call __pthread_enable_asynccancel - movl %eax, 8(%esp) + LOCK + incl NWAITERS(%ecx) - xorl %ecx, %ecx +7: xorl %ecx, %ecx movl %esp, %ebx movl %ecx, %edx - movl $SYS_gettimeofday, %eax + movl $__NR_gettimeofday, %eax ENTER_KERNEL /* Compute relative timeout. */ @@ -103,19 +92,30 @@ sem_timedwait: movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) - movl 28(%esp), %ebx - xorl %ecx, %ecx + +.LcleanupSTART: + call __pthread_enable_asynccancel + movl %eax, 8(%esp) + + movl 28(%esp), %ebx /* Load semaphore address. */ +#if FUTEX_WAIT == 0 + movl PRIVATE(%ebx), %ecx +#else + movl $FUTEX_WAIT, %ecx + orl PRIVATE(%ebx), %ecx +#endif movl %esp, %esi - movl $SYS_futex, %eax xorl %edx, %edx + movl $SYS_futex, %eax ENTER_KERNEL movl %eax, %esi movl 8(%esp), %eax call __pthread_disable_asynccancel +.LcleanupEND: testl %esi, %esi - je,pt 9f + je 9f cmpl $-EWOULDBLOCK, %esi jne 3f @@ -126,29 +126,27 @@ sem_timedwait: leal -1(%eax), %ecx LOCK cmpxchgl %ecx, (%ebx) - jne,pn 8b + jne 8b - addl $12, %esp - cfi_adjust_cfa_offset(-12) xorl %eax, %eax + + LOCK + decl NWAITERS(%ebx) + +10: addl $12, %esp +.Ladd_esp: popl %ebx - cfi_adjust_cfa_offset(-4) - cfi_restore(3) +.Lpop_ebx: popl %edi - cfi_adjust_cfa_offset(-4) - cfi_restore(7) +.Lpop_edi: popl %esi - cfi_adjust_cfa_offset(-4) - cfi_restore(6) +.Lpop_esi: ret - cfi_adjust_cfa_offset(24) - cfi_offset(6, -8) /* %esi */ - cfi_offset(7, -12) /* %edi */ - cfi_offset(3, -16) /* %ebx */ +.Lafter_ret: 3: negl %esi 6: -#ifdef __PIC__ +#ifdef PIC call __x86.get_pc_thunk.bx #else movl $4f, %ebx @@ -169,25 +167,163 @@ sem_timedwait: movl %esi, (%eax) #endif - addl $12, %esp - cfi_adjust_cfa_offset(-12) + movl 28(%esp), %ebx /* Load semaphore address. */ orl $-1, %eax - popl %ebx - cfi_adjust_cfa_offset(-4) - cfi_restore(3) - popl %edi - cfi_adjust_cfa_offset(-4) - cfi_restore(7) - popl %esi - cfi_adjust_cfa_offset(-4) - cfi_restore(6) - ret + jmp 10b + .size sem_timedwait,.-sem_timedwait + -10: /* Canceled. */ - movl $0xffffffff, %gs:RESULT + .type sem_wait_cleanup,@function +sem_wait_cleanup: LOCK - orl $0x10, %gs:CANCELHANDLING - movl %gs:CLEANUP_JMP_BUF, %eax - jmp HIDDEN_JUMPTARGET (__pthread_unwind) - cfi_endproc - .size sem_timedwait,.-sem_timedwait + 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_esi-.LSTARTCODE + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 8 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 2 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_edi-.Lpush_esi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 12 + .byte 0x87 # DW_CFA_offset %edi + .uleb128 3 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_ebx-.Lpush_edi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 4 + .byte 4 # DW_CFA_advance_loc4 + .long .Lsub_esp-.Lpush_ebx + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 28 + .byte 4 # DW_CFA_advance_loc4 + .long .Ladd_esp-.Lsub_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_ebx-.Ladd_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 12 + .byte 0xc3 # DW_CFA_restore %ebx + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_edi-.Lpop_ebx + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 8 + .byte 0xc7 # DW_CFA_restore %edi + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_esi-.Lpop_edi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 4 + .byte 0xc6 # DW_CFA_restore %esi + .byte 4 # DW_CFA_advance_loc4 + .long .Lafter_ret-.Lpop_esi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 28 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 2 + .byte 0x87 # DW_CFA_offset %edi + .uleb128 3 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 4 + .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 |