diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S | 291 |
1 files changed, 34 insertions, 257 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S index d0eef75144..b1296275d0 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. +/* 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. @@ -20,7 +20,6 @@ #include <sysdep.h> #include <shlib-compat.h> #include <pthread-errnos.h> -#include <structsem.h> #ifndef UP # define LOCK lock @@ -29,261 +28,22 @@ #endif #define SYS_futex 240 -#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 -#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 + cfi_startproc __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 - call __i686.get_pc_thunk.bx -#else - movl $8f, %ebx -8: -#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 - - 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 + /* First check for cancellation. */ + movl %gs:CANCELHANDLING, %eax + andl $0xfffffff9, %eax + cmpl $8, %eax + je 5f - .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 @@ -292,9 +52,9 @@ __old_sem_wait: cfi_adjust_cfa_offset(4) movl 16(%esp), %ebx - cfi_offset(ebx, -8) + cfi_offset(3, -8) /* %ebx */ - cfi_offset(esi, -12) + cfi_offset(6, -12) /* %esi */ 3: movl (%ebx), %eax 2: testl %eax, %eax je 1f @@ -305,17 +65,17 @@ __old_sem_wait: jne 2b xorl %eax, %eax -5: movl 4(%esp), %esi + movl 4(%esp), %esi + cfi_restore(6) movl 8(%esp), %ebx + cfi_restore(3) 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) + cfi_offset(3, -8) /* %ebx */ + cfi_offset(6, -12) /* %esi */ 1: call __pthread_enable_asynccancel movl %eax, (%esp) @@ -355,8 +115,25 @@ __old_sem_wait: movl %esi, (%eax) #endif orl $-1, %eax - jmp 5b + 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 __old_sem_wait,.-__old_sem_wait + .size __new_sem_wait,.-__new_sem_wait + versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1) +#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) + .global __old_sem_wait +__old_sem_wait = __new_sem_wait compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0) #endif |