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

   1 /* Copyright (C) 2002, 2003, 2004 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 #include <pt-machine.h>
  23 #ifndef __ASSEMBLER__
  24 # include <linuxthreads/internals.h>
  25 #endif
  26
  27 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  28
  29 # undef PSEUDO
  30 # define PSEUDO(name, syscall_name, args)                                     \
  31   .text;                                                                      \
  32   ENTRY (name)                                                                \
  33     SINGLE_THREAD_P;                                                          \
  34     jne L(pseudo_cancel);                                                     \
  35     DO_CALL (syscall_name, args);                                             \
  36     cmpl $-4095, %eax;                                                        \
  37     jae SYSCALL_ERROR_LABEL;                                                  \
  38     ret;                                                                      \
  39   L(pseudo_cancel):                                                           \
  40     CENABLE                                                                   \
  41     SAVE_OLDTYPE_##args                                                       \
  42     PUSHCARGS_##args                                                          \
  43     DOCARGS_##args                                                            \
  44     movl $SYS_ify (syscall_name), %eax;                                       \
  45     int $0x80                                                                 \
  46     POPCARGS_##args;                                                          \
  47     POPSTATE_##args                                                           \
  48     cmpl $-4095, %eax;                                                        \
  49     jae SYSCALL_ERROR_LABEL;                                                  \
  50   L(pseudo_end):
  51
  52 # define SAVE_OLDTYPE_0 movl %eax, %ecx;
  53 # define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0
  54 # define SAVE_OLDTYPE_2 pushl %eax;
  55 # define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2
  56 # define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2
  57 # define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2
  58
  59 # define PUSHCARGS_0    /* No arguments to push.  */
  60 # define DOCARGS_0      /* No arguments to frob.  */
  61 # define POPCARGS_0     /* No arguments to pop.  */
  62 # define _PUSHCARGS_0   /* No arguments to push.  */
  63 # define _POPCARGS_0    /* No arguments to pop.  */
  64
  65 # define PUSHCARGS_1    movl %ebx, %edx; PUSHCARGS_0
  66 # define DOCARGS_1      _DOARGS_1 (4)
  67 # define POPCARGS_1     POPCARGS_0; movl %edx, %ebx
  68 # define _PUSHCARGS_1   pushl %ebx; L(PUSHBX2): _PUSHCARGS_0
  69 # define _POPCARGS_1    _POPCARGS_0; popl %ebx; L(POPBX2):
  70
  71 # define PUSHCARGS_2    PUSHCARGS_1
  72 # define DOCARGS_2      _DOARGS_2 (12)
  73 # define POPCARGS_2     POPCARGS_1
  74 # define _PUSHCARGS_2   _PUSHCARGS_1
  75 # define _POPCARGS_2    _POPCARGS_1
  76
  77 # define PUSHCARGS_3    _PUSHCARGS_2
  78 # define DOCARGS_3      _DOARGS_3 (20)
  79 # define POPCARGS_3     _POPCARGS_3
  80 # define _PUSHCARGS_3   _PUSHCARGS_2
  81 # define _POPCARGS_3    _POPCARGS_2
  82
  83 # define PUSHCARGS_4    _PUSHCARGS_4
  84 # define DOCARGS_4      _DOARGS_4 (28)
  85 # define POPCARGS_4     _POPCARGS_4
  86 # define _PUSHCARGS_4   pushl %esi; L(PUSHSI2): _PUSHCARGS_3
  87 # define _POPCARGS_4    _POPCARGS_3; popl %esi; L(POPSI2):
  88
  89 # define PUSHCARGS_5    _PUSHCARGS_5
  90 # define DOCARGS_5      _DOARGS_5 (36)
  91 # define POPCARGS_5     _POPCARGS_5
  92 # define _PUSHCARGS_5   pushl %edi; L(PUSHDI2): _PUSHCARGS_4
  93 # define _POPCARGS_5    _POPCARGS_4; popl %edi; L(POPDI2):
  94
  95 # ifdef IS_IN_libpthread
  96 #  define CENABLE       call __pthread_enable_asynccancel;
  97 #  define CDISABLE      call __pthread_disable_asynccancel
  98 # elif defined IS_IN_librt
  99 #  ifdef PIC
 100 #   define CENABLE      pushl %ebx; \
 101                         call __i686.get_pc_thunk.bx; \
 102                         addl     $_GLOBAL_OFFSET_TABLE_, %ebx; \
 103                         call __librt_enable_asynccancel@PLT; \
 104                         popl %ebx;
 105 #   define CDISABLE     pushl %ebx; \
 106                         call __i686.get_pc_thunk.bx; \
 107                         addl     $_GLOBAL_OFFSET_TABLE_, %ebx; \
 108                         call __librt_disable_asynccancel@PLT; \
 109                         popl %ebx;
 110 #  else
 111 #   define CENABLE      call __librt_enable_asynccancel;
 112 #   define CDISABLE     call __librt_disable_asynccancel
 113 #  endif
 114 # else
 115 #  define CENABLE       call __libc_enable_asynccancel;
 116 #  define CDISABLE      call __libc_disable_asynccancel
 117 # endif
 118 # define POPSTATE_0     pushl %eax; movl %ecx, %eax; CDISABLE; popl %eax;
 119 # define POPSTATE_1     POPSTATE_0
 120 # define POPSTATE_2     xchgl (%esp), %eax; CDISABLE; popl %eax;
 121 # define POPSTATE_3     POPSTATE_2
 122 # define POPSTATE_4     POPSTATE_2
 123 # define POPSTATE_5     POPSTATE_2
 124
 125 #if !defined NOT_IN_libc
 126 # define __local_multiple_threads __libc_multiple_threads
 127 #elif defined IS_IN_libpthread
 128 # define __local_multiple_threads __pthread_multiple_threads
 129 #else
 130 # define __local_multiple_threads __librt_multiple_threads
 131 #endif
 132
 133 # ifndef __ASSEMBLER__
 134 #  if defined FLOATING_STACKS && USE___THREAD && defined PIC
 135 #   define SINGLE_THREAD_P \
 136   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
 137                                    p_header.data.multiple_threads) == 0, 1)
 138 #  else
 139 extern int __local_multiple_threads
 140 #   if !defined NOT_IN_libc || defined IS_IN_libpthread
 141   attribute_hidden;
 142 #   else
 143   ;
 144 #   endif
 145 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
 146 #  endif
 147 # else
 148 #  if !defined PIC
 149 #   define SINGLE_THREAD_P cmpl $0, __local_multiple_threads
 150 #  elif defined FLOATING_STACKS && USE___THREAD
 151 #   define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
 152 #  else
 153 #   if !defined NOT_IN_libc || defined IS_IN_libpthread
 154 #    define __SINGLE_THREAD_CMP cmpl $0, __local_multiple_threads@GOTOFF(%ecx)
 155 #   else
 156 #    define __SINGLE_THREAD_CMP \
 157   movl __local_multiple_threads@GOT(%ecx), %ecx;\
 158   cmpl $0, (%ecx)
 159 #   endif
 160 #   if !defined HAVE_HIDDEN || !USE___THREAD
 161 #    define SINGLE_THREAD_P \
 162   SETUP_PIC_REG (cx);                           \
 163   addl $_GLOBAL_OFFSET_TABLE_, %ecx;            \
 164   __SINGLE_THREAD_CMP
 165 #   else
 166 #    define SINGLE_THREAD_P \
 167   call __i686.get_pc_thunk.cx;                  \
 168   addl $_GLOBAL_OFFSET_TABLE_, %ecx;            \
 169   __SINGLE_THREAD_CMP
 170 #   endif
 171 #  endif
 172 # endif
 173
 174 #elif !defined __ASSEMBLER__
 175
 176 /* This code should never be used but we define it anyhow.  */
 177 # define SINGLE_THREAD_P (1)
 178
 179 #endif