nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@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 <tls.h>
  22 #ifndef ASSEMBLER
  23 # include <nptl/pthreadP.h>
  24 #endif
  25
  26 #if !defined NOT_IN_libc || defined IS_IN_libpthread
  27
  28 # undef PSEUDO
  29 # define PSEUDO(name, syscall_name, args)                                     \
  30   .text;                                                                      \
  31   ENTRY (name)                                                                \
  32     cmpl $0, %gs:MULTIPLE_THREADS_OFFSET;                                     \
  33     jne L(pseudo_cancel);                                                     \
  34     DO_CALL (syscall_name, args);                                             \
  35     cmpl $-4095, %eax;                                                        \
  36     jae SYSCALL_ERROR_LABEL;                                                  \
  37     ret;                                                                      \
  38   L(pseudo_cancel):                                                           \
  39     CENABLE                                                                   \
  40     SAVE_OLDTYPE_##args                                                       \
  41     PUSHARGS_##args                                                           \
  42     DOCARGS_##args                                                            \
  43     movl $SYS_ify (syscall_name), %eax;                                       \
  44     int $0x80                                                                 \
  45     POPARGS_##args;                                                           \
  46     POPCARGS_##args                                                           \
  47     cmpl $-4095, %eax;                                                        \
  48     jae SYSCALL_ERROR_LABEL;                                                  \
  49   L(pseudo_end):
  50
  51 # define SAVE_OLDTYPE_0 movl %eax, %edx;
  52 # define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0
  53 # define SAVE_OLDTYPE_2 pushl %eax;
  54 # define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2
  55 # define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2
  56 # define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2
  57
  58 # define DOCARGS_0      DOARGS_0
  59 # define DOCARGS_1      DOARGS_1
  60 # define DOCARGS_2      _DOARGS_2 (12)
  61 # define DOCARGS_3      _DOARGS_3 (20)
  62 # define DOCARGS_4      _DOARGS_4 (28)
  63 # define DOCARGS_5      _DOARGS_5 (36)
  64
  65 # ifdef IS_IN_libpthread
  66 #  define CENABLE       call __pthread_enable_asynccancel;
  67 #  define CDISABLE      call __pthread_disable_asynccancel
  68 # else
  69 #  define CENABLE       call __libc_enable_asynccancel;
  70 #  define CDISABLE      call __libc_disable_asynccancel
  71 # endif
  72 # define POPCARGS_0     pushl %eax; movl %ecx, %eax; CDISABLE; popl %eax;
  73 # define POPCARGS_1     POPCARGS_0
  74 # define POPCARGS_2     xchgl (%esp), %eax; CDISABLE; popl %eax;
  75 # define POPCARGS_3     POPCARGS_2
  76 # define POPCARGS_4     POPCARGS_2
  77 # define POPCARGS_5     POPCARGS_2
  78
  79 # ifndef ASSEMBLER
  80 #  define SINGLE_THREAD_P \
  81   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
  82                                    header.data.multiple_threads) == 0, 1)
  83 # else
  84 #  define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
  85 # endif
  86
  87 #elif !defined ASSEMBLER
  88
  89 /* This code should never be used but we define it anyhow.  */
  90 # define SINGLE_THREAD_P (1)
  91
  92 #endif