linuxthreads/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Schwab <schwab@suse.de>, 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 #ifndef ASSEMBLER
  22 # include <linuxthreads/internals.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread
  26
  27 # undef PSEUDO
  28 # define PSEUDO(name, syscall_name, args)                                     \
  29   .text;                                                                      \
  30   ENTRY (name)                                                                \
  31     SINGLE_THREAD_P;                                                          \
  32     jne .Lpseudo_cancel;                                                      \
  33     DO_CALL (syscall_name, args);                                             \
  34     cmp.l &-4095, %d0;                                                        \
  35     jcc SYSCALL_ERROR_LABEL;                                                  \
  36     rts;                                                                      \
  37   .Lpseudo_cancel:                                                            \
  38     CENABLE;                                                                  \
  39     DOCARGS_##args                                                            \
  40     move.l %d0, -(%sp);                                                       \
  41     move.l &SYS_ify (syscall_name), %d0;                                      \
  42     trap &0;                                                                  \
  43     move.l %d0, %d2;                                                          \
  44     CDISABLE;                                                                 \
  45     addq.l &4, %sp;                                                           \
  46     move.l %d2, %d0;                                                          \
  47     UNDOCARGS_##args                                                          \
  48     cmp.l &-4095, %d0;                                                        \
  49     jcc SYSCALL_ERROR_LABEL
  50
  51 # define DOCARGS_0      move.l %d2, -(%sp);
  52 # define _DOCARGS_0(n)
  53 # define UNDOCARGS_0    move.l (%sp)+, %d2;
  54
  55 # define DOCARGS_1      _DOCARGS_1 (4); DOCARGS_0
  56 # define _DOCARGS_1(n)  move.l n(%sp), %d1; _DOARGS_0 (n)
  57 # define UNDOCARGS_1    UNDOCARGS_0
  58
  59 # define DOCARGS_2      _DOCARGS_2 (8)
  60 # define _DOCARGS_2(n)  move.l %d2, -(%sp); move.l n+4(%sp), %d2;       \
  61                         _DOCARGS_1 (n)
  62 # define UNDOCARGS_2    UNDOCARGS_1
  63
  64 # define DOCARGS_3      _DOCARGS_3 (12)
  65 # define _DOCARGS_3(n)  move.l %d3, -(%sp); move.l n+4(%sp), %d3;       \
  66                         _DOCARGS_2 (n)
  67 # define UNDOCARGS_3    UNDOCARGS_2; move.l (%sp)+, %d3;
  68
  69 # define DOCARGS_4      _DOCARGS_4 (16)
  70 # define _DOCARGS_4(n)  move.l %d4, -(%sp); move.l n+4(%sp), %d4;       \
  71                         _DOCARGS_3 (n)
  72 # define UNDOCARGS_4    UNDOCARGS_3; move.l (%sp)+, %d4;
  73
  74 # define DOCARGS_5      _DOCARGS_5 (20)
  75 # define _DOCARGS_5(n)  move.l %d5, -(%sp); move.l n+4(%sp), %d5;       \
  76                         _DOCARGS_4 (n)
  77 # define UNDOCARGS_5    UNDOCARGS_4; move.l (%sp)+, %d5;
  78
  79 # ifdef IS_IN_libpthread
  80 #  define CENABLE       jbsr __pthread_enable_asynccancel
  81 #  define CDISABLE      jbsr __pthread_disable_asynccancel
  82 # else
  83 #  define CENABLE       jbsr __libc_enable_asynccancel
  84 #  define CDISABLE      jbsr __libc_disable_asynccancel
  85 # endif
  86
  87 # if !defined NOT_IN_libc
  88 #  define __local_multiple_threads __libc_multiple_threads
  89 # else
  90 #  define __local_multiple_threads __pthread_multiple_threads
  91 # endif
  92
  93 # ifndef ASSEMBLER
  94 extern int __local_multiple_threads attribute_hidden;
  95 #  define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
  96 # else
  97 #  if !defined PIC
  98 #   define SINGLE_THREAD_P tst.l __local_multiple_threads
  99 #  else
 100 #   if !defined HAVE_HIDDEN || !USE___THREAD
 101 #    define SINGLE_THREAD_P \
 102   tst.l (__local_multiple_threads@GOTPC, %pc)
 103 #   else
 104 #    define SINGLE_THREAD_P \
 105   tst.l  (__local_multiple_threads@GOTPC, %pc)
 106 #   endif
 107 #  endif
 108 # endif
 109
 110 #elif !defined ASSEMBLER
 111
 112 /* This code should never be used but we define it anyhow.  */
 113 # define SINGLE_THREAD_P (1)
 114
 115 #endif