nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S

   1 /* Copyright (C) 2002-2005, 2007, 2009, 2011-2012 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sysdep.h>
  21 #include <shlib-compat.h>
  22 #include <pthread-errnos.h>
  23 #include <structsem.h>
  24 #include <lowlevellock.h>
  25
  26
  27 #if VALUE != 0
  28 # error "code needs to be rewritten for VALUE != 0"
  29 #endif
  30
  31
  32         .text
  33
  34         .globl  sem_timedwait
  35         .type   sem_timedwait,@function
  36         .align  16
  37 sem_timedwait:
  38 .LSTARTCODE:
  39         movl    4(%esp), %ecx
  40
  41         movl    (%ecx), %eax
  42 2:      testl   %eax, %eax
  43         je      1f
  44
  45         leal    -1(%eax), %edx
  46         LOCK
  47         cmpxchgl %edx, (%ecx)
  48         jne     2b
  49
  50         xorl    %eax, %eax
  51         ret
  52
  53         /* Check whether the timeout value is valid.  */
  54 1:      pushl   %esi
  55 .Lpush_esi:
  56         pushl   %edi
  57 .Lpush_edi:
  58         pushl   %ebx
  59 .Lpush_ebx:
  60         subl    $12, %esp
  61 .Lsub_esp:
  62
  63         movl    32(%esp), %edi
  64
  65         /* Check for invalid nanosecond field.  */
  66         cmpl    $1000000000, 4(%edi)
  67         movl    $EINVAL, %esi
  68         jae     6f
  69
  70         LOCK
  71         incl    NWAITERS(%ecx)
  72
  73 7:      xorl    %ecx, %ecx
  74         movl    %esp, %ebx
  75         movl    %ecx, %edx
  76         movl    $__NR_gettimeofday, %eax
  77         ENTER_KERNEL
  78
  79         /* Compute relative timeout.  */
  80         movl    4(%esp), %eax
  81         movl    $1000, %edx
  82         mul     %edx            /* Milli seconds to nano seconds.  */
  83         movl    (%edi), %ecx
  84         movl    4(%edi), %edx
  85         subl    (%esp), %ecx
  86         subl    %eax, %edx
  87         jns     5f
  88         addl    $1000000000, %edx
  89         subl    $1, %ecx
  90 5:      testl   %ecx, %ecx
  91         movl    $ETIMEDOUT, %esi
  92         js      6f              /* Time is already up.  */
  93
  94         movl    %ecx, (%esp)    /* Store relative timeout.  */
  95         movl    %edx, 4(%esp)
  96
  97 .LcleanupSTART:
  98         call    __pthread_enable_asynccancel
  99         movl    %eax, 8(%esp)
 100
 101         movl    28(%esp), %ebx  /* Load semaphore address.  */
 102 #if FUTEX_WAIT == 0
 103         movl    PRIVATE(%ebx), %ecx
 104 #else
 105         movl    $FUTEX_WAIT, %ecx
 106         orl     PRIVATE(%ebx), %ecx
 107 #endif
 108         movl    %esp, %esi
 109         xorl    %edx, %edx
 110         movl    $SYS_futex, %eax
 111         ENTER_KERNEL
 112         movl    %eax, %esi
 113
 114         movl    8(%esp), %eax
 115         call    __pthread_disable_asynccancel
 116 .LcleanupEND:
 117
 118         testl   %esi, %esi
 119         je      9f
 120         cmpl    $-EWOULDBLOCK, %esi
 121         jne     3f
 122
 123 9:      movl    (%ebx), %eax
 124 8:      testl   %eax, %eax
 125         je      7b
 126
 127         leal    -1(%eax), %ecx
 128         LOCK
 129         cmpxchgl %ecx, (%ebx)
 130         jne     8b
 131
 132         xorl    %eax, %eax
 133
 134         LOCK
 135         decl    NWAITERS(%ebx)
 136
 137 10:     addl    $12, %esp
 138 .Ladd_esp:
 139         popl    %ebx
 140 .Lpop_ebx:
 141         popl    %edi
 142 .Lpop_edi:
 143         popl    %esi
 144 .Lpop_esi:
 145         ret
 146
 147 .Lafter_ret:
 148 3:      negl    %esi
 149 6:
 150 #ifdef PIC
 151         SETUP_PIC_REG(bx)
 152 #else
 153         movl    $4f, %ebx
 154 4:
 155 #endif
 156         addl    $_GLOBAL_OFFSET_TABLE_, %ebx
 157 #ifdef NO_TLS_DIRECT_SEG_REFS
 158         movl    errno@gotntpoff(%ebx), %edx
 159         addl    %gs:0, %edx
 160         movl    %esi, (%edx)
 161 #else
 162         movl    errno@gotntpoff(%ebx), %edx
 163         movl    %esi, %gs:(%edx)
 164 #endif
 165
 166         movl    28(%esp), %ebx  /* Load semaphore address.  */
 167         orl     $-1, %eax
 168         jmp     10b
 169         .size   sem_timedwait,.-sem_timedwait
 170
 171
 172         .type   sem_wait_cleanup,@function
 173 sem_wait_cleanup:
 174         LOCK
 175         decl    NWAITERS(%ebx)
 176         movl    %eax, (%esp)
 177 .LcallUR:
 178         call    _Unwind_Resume@PLT
 179         hlt
 180 .LENDCODE:
 181         .size   sem_wait_cleanup,.-sem_wait_cleanup
 182
 183
 184         .section .gcc_except_table,"a",@progbits
 185 .LexceptSTART:
 186         .byte   0xff                            # @LPStart format (omit)
 187         .byte   0xff                            # @TType format (omit)
 188         .byte   0x01                            # call-site format
 189                                                 # DW_EH_PE_uleb128
 190         .uleb128 .Lcstend-.Lcstbegin
 191 .Lcstbegin:
 192         .uleb128 .LcleanupSTART-.LSTARTCODE
 193         .uleb128 .LcleanupEND-.LcleanupSTART
 194         .uleb128 sem_wait_cleanup-.LSTARTCODE
 195         .uleb128  0
 196         .uleb128 .LcallUR-.LSTARTCODE
 197         .uleb128 .LENDCODE-.LcallUR
 198         .uleb128 0
 199         .uleb128  0
 200 .Lcstend:
 201
 202
 203         .section .eh_frame,"a",@progbits
 204 .LSTARTFRAME:
 205         .long   .LENDCIE-.LSTARTCIE             # Length of the CIE.
 206 .LSTARTCIE:
 207         .long   0                               # CIE ID.
 208         .byte   1                               # Version number.
 209 #ifdef SHARED
 210         .string "zPLR"                          # NUL-terminated augmentation
 211                                                 # string.
 212 #else
 213         .string "zPL"                           # NUL-terminated augmentation
 214                                                 # string.
 215 #endif
 216         .uleb128 1                              # Code alignment factor.
 217         .sleb128 -4                             # Data alignment factor.
 218         .byte   8                               # Return address register
 219                                                 # column.
 220 #ifdef SHARED
 221         .uleb128 7                              # Augmentation value length.
 222         .byte   0x9b                            # Personality: DW_EH_PE_pcrel
 223                                                 # + DW_EH_PE_sdata4
 224                                                 # + DW_EH_PE_indirect
 225         .long   DW.ref.__gcc_personality_v0-.
 226         .byte   0x1b                            # LSDA Encoding: DW_EH_PE_pcrel
 227                                                 # + DW_EH_PE_sdata4.
 228         .byte   0x1b                            # FDE Encoding: DW_EH_PE_pcrel
 229                                                 # + DW_EH_PE_sdata4.
 230 #else
 231         .uleb128 6                              # Augmentation value length.
 232         .byte   0x0                             # Personality: absolute
 233         .long   __gcc_personality_v0
 234         .byte   0x0                             # LSDA Encoding: absolute
 235 #endif
 236         .byte 0x0c                              # DW_CFA_def_cfa
 237         .uleb128 4
 238         .uleb128 4
 239         .byte   0x88                            # DW_CFA_offset, column 0x10
 240         .uleb128 1
 241         .align 4
 242 .LENDCIE:
 243
 244         .long   .LENDFDE-.LSTARTFDE             # Length of the FDE.
 245 .LSTARTFDE:
 246         .long   .LSTARTFDE-.LSTARTFRAME         # CIE pointer.
 247 #ifdef SHARED
 248         .long   .LSTARTCODE-.                   # PC-relative start address
 249                                                 # of the code.
 250 #else
 251         .long   .LSTARTCODE                     # Start address of the code.
 252 #endif
 253         .long   .LENDCODE-.LSTARTCODE           # Length of the code.
 254         .uleb128 4                              # Augmentation size
 255 #ifdef SHARED
 256         .long   .LexceptSTART-.
 257 #else
 258         .long   .LexceptSTART
 259 #endif
 260
 261         .byte   4                               # DW_CFA_advance_loc4
 262         .long   .Lpush_esi-.LSTARTCODE
 263         .byte   14                              # DW_CFA_def_cfa_offset
 264         .uleb128 8
 265         .byte   0x86                            # DW_CFA_offset %esi
 266         .uleb128 2
 267         .byte   4                               # DW_CFA_advance_loc4
 268         .long   .Lpush_edi-.Lpush_esi
 269         .byte   14                              # DW_CFA_def_cfa_offset
 270         .uleb128 12
 271         .byte   0x87                            # DW_CFA_offset %edi
 272         .uleb128 3
 273         .byte   4                               # DW_CFA_advance_loc4
 274         .long   .Lpush_ebx-.Lpush_edi
 275         .byte   14                              # DW_CFA_def_cfa_offset
 276         .uleb128 16
 277         .byte   0x83                            # DW_CFA_offset %ebx
 278         .uleb128 4
 279         .byte   4                               # DW_CFA_advance_loc4
 280         .long   .Lsub_esp-.Lpush_ebx
 281         .byte   14                              # DW_CFA_def_cfa_offset
 282         .uleb128 28
 283         .byte   4                               # DW_CFA_advance_loc4
 284         .long   .Ladd_esp-.Lsub_esp
 285         .byte   14                              # DW_CFA_def_cfa_offset
 286         .uleb128 16
 287         .byte   4                               # DW_CFA_advance_loc4
 288         .long   .Lpop_ebx-.Ladd_esp
 289         .byte   14                              # DW_CFA_def_cfa_offset
 290         .uleb128 12
 291         .byte   0xc3                            # DW_CFA_restore %ebx
 292         .byte   4                               # DW_CFA_advance_loc4
 293         .long   .Lpop_edi-.Lpop_ebx
 294         .byte   14                              # DW_CFA_def_cfa_offset
 295         .uleb128 8
 296         .byte   0xc7                            # DW_CFA_restore %edi
 297         .byte   4                               # DW_CFA_advance_loc4
 298         .long   .Lpop_esi-.Lpop_edi
 299         .byte   14                              # DW_CFA_def_cfa_offset
 300         .uleb128 4
 301         .byte   0xc6                            # DW_CFA_restore %esi
 302         .byte   4                               # DW_CFA_advance_loc4
 303         .long   .Lafter_ret-.Lpop_esi
 304         .byte   14                              # DW_CFA_def_cfa_offset
 305         .uleb128 28
 306         .byte   0x86                            # DW_CFA_offset %esi
 307         .uleb128 2
 308         .byte   0x87                            # DW_CFA_offset %edi
 309         .uleb128 3
 310         .byte   0x83                            # DW_CFA_offset %ebx
 311         .uleb128 4
 312         .align  4
 313 .LENDFDE:
 314
 315
 316 #ifdef SHARED
 317         .hidden DW.ref.__gcc_personality_v0
 318         .weak   DW.ref.__gcc_personality_v0
 319         .section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
 320         .align  4
 321         .type   DW.ref.__gcc_personality_v0, @object
 322         .size   DW.ref.__gcc_personality_v0, 4
 323 DW.ref.__gcc_personality_v0:
 324         .long   __gcc_personality_v0
 325 #endif