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

   1 /* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <sysdep.h>
  20 #include <tls.h>
  21 #include <pt-machine.h>
  22 #ifndef __ASSEMBLER__
  23 # include <linuxthreads/internals.h>
  24 #endif
  25
  26 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  27
  28 # define _IMM12 #-12
  29 # define _IMM16 #-16
  30 # define _IMP16 #16
  31 # undef PSEUDO
  32 # define PSEUDO(name, syscall_name, args) \
  33   .text; \
  34   ENTRY (name); \
  35     SINGLE_THREAD_P; \
  36     bf .Lpseudo_cancel; \
  37     DO_CALL (syscall_name, args); \
  38     mov r0,r1; \
  39     mov _IMM12,r2; \
  40     shad r2,r1; \
  41     not r1,r1; \
  42     tst r1,r1; \
  43     bt .Lsyscall_error; \
  44     bra .Lpseudo_end; \
  45      nop; \
  46  .Lpseudo_cancel: \
  47     sts.l pr,@-r15; \
  48     add _IMM16,r15; \
  49     SAVE_ARGS_##args; \
  50     CENABLE; \
  51     LOAD_ARGS_##args; \
  52     add _IMP16,r15; \
  53     lds.l @r15+,pr; \
  54     DO_CALL(syscall_name, args); \
  55     SYSCALL_INST_PAD; \
  56     sts.l pr,@-r15; \
  57     mov.l r0,@-r15; \
  58     CDISABLE; \
  59     mov.l @r15+,r0; \
  60     lds.l @r15+,pr; \
  61     mov r0,r1; \
  62     mov _IMM12,r2; \
  63     shad r2,r1; \
  64     not r1,r1; \
  65     tst r1,r1; \
  66     bf .Lpseudo_end; \
  67  .Lsyscall_error: \
  68     SYSCALL_ERROR_HANDLER; \
  69  .Lpseudo_end:
  70
  71 # undef PSEUDO_END
  72 # define PSEUDO_END(sym) \
  73   END (sym)
  74
  75 # define SAVE_ARGS_0    /* Nothing.  */
  76 # define SAVE_ARGS_1    SAVE_ARGS_0; mov.l r4,@(0,r15)
  77 # define SAVE_ARGS_2    SAVE_ARGS_1; mov.l r5,@(4,r15)
  78 # define SAVE_ARGS_3    SAVE_ARGS_2; mov.l r6,@(8,r15)
  79 # define SAVE_ARGS_4    SAVE_ARGS_3; mov.l r7,@(12,r15)
  80 # define SAVE_ARGS_5    SAVE_ARGS_4
  81 # define SAVE_ARGS_6    SAVE_ARGS_5
  82
  83 # define LOAD_ARGS_0    /* Nothing.  */
  84 # define LOAD_ARGS_1    LOAD_ARGS_0; mov.l @(0,r15),r4
  85 # define LOAD_ARGS_2    LOAD_ARGS_1; mov.l @(4,r15),r5
  86 # define LOAD_ARGS_3    LOAD_ARGS_2; mov.l @(8,r15),r6
  87 # define LOAD_ARGS_4    LOAD_ARGS_3; mov.l @(12,r15),r7
  88 # define LOAD_ARGS_5    LOAD_ARGS_4
  89 # define LOAD_ARGS_6    LOAD_ARGS_5
  90
  91 # ifdef IS_IN_libpthread
  92 #  define __local_enable_asynccancel    __pthread_enable_asynccancel
  93 #  define __local_disable_asynccancel   __pthread_disable_asynccancel
  94 #  define __local_multiple_threads      __pthread_multiple_threads
  95 # elif !defined NOT_IN_libc
  96 #  define __local_enable_asynccancel    __libc_enable_asynccancel
  97 #  define __local_disable_asynccancel   __libc_disable_asynccancel
  98 #  define __local_multiple_threads      __libc_multiple_threads
  99 # else
 100 #  define __local_enable_asynccancel    __librt_enable_asynccancel
 101 #  define __local_disable_asynccancel   __librt_disable_asynccancel
 102 #  define __local_multiple_threads      __librt_multiple_threads
 103 # endif
 104
 105 # if defined IS_IN_librt && defined PIC
 106 #  define CENABLE \
 107         mov.l r12,@-r15; \
 108         mov.l 1f,r12; \
 109         mova 1f,r0; \
 110         add r0,r12; \
 111         mov.l 2f,r0; \
 112         bsrf r0; \
 113          nop; \
 114      0: bra 3f; \
 115          mov r0,r2; \
 116         .align 2; \
 117      1: .long _GLOBAL_OFFSET_TABLE_; \
 118      2: .long __local_enable_asynccancel@PLT - (0b-.); \
 119      3: mov.l @r15+,r12
 120
 121 #  define CDISABLE \
 122         mov.l r12,@-r15; \
 123         mov.l 1f,r12; \
 124         mova 1f,r0; \
 125         add r0,r12; \
 126         mov.l 2f,r0; \
 127         bsrf r0; \
 128          mov r2,r4; \
 129      0: bra 3f; \
 130          nop; \
 131         .align 2; \
 132      1: .long _GLOBAL_OFFSET_TABLE_; \
 133      2: .long __local_disable_asynccancel@PLT - (0b-.); \
 134      3: mov.l @r15+,r12
 135 # else
 136 #  define CENABLE \
 137         mov.l 1f,r0; \
 138         bsrf r0; \
 139          nop; \
 140      0: bra 2f; \
 141          mov r0,r2; \
 142         .align 2; \
 143      1: .long __local_enable_asynccancel - 0b; \
 144      2:
 145
 146 #  define CDISABLE \
 147         mov.l 1f,r0; \
 148         bsrf r0; \
 149          mov r2,r4; \
 150      0: bra 2f; \
 151          nop; \
 152         .align 2; \
 153      1: .long __local_disable_asynccancel - 0b; \
 154      2:
 155 # endif
 156
 157 # ifndef __ASSEMBLER__
 158 #  if defined FLOATING_STACKS && USE___THREAD && defined PIC
 159 #   define SINGLE_THREAD_P \
 160   __builtin_expect (THREAD_GETMEM (THREAD_SELF, p_multiple_threads) == 0, 1)
 161 #  else
 162 extern int __local_multiple_threads attribute_hidden;
 163 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
 164 #  endif
 165 # else
 166 #  if !defined PIC
 167 #   define SINGLE_THREAD_P \
 168         mov.l 1f,r0; \
 169         mov.l @r0,r0; \
 170         bra 2f; \
 171          tst r0,r0; \
 172         .align 2; \
 173      1: .long __local_multiple_threads; \
 174      2:
 175 #  elif defined FLOATING_STACKS && USE___THREAD
 176 #   define SINGLE_THREAD_P \
 177         stc gbr,r0; \
 178         mov.w 0f,r1; \
 179         sub r1,r0; \
 180         mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
 181         bra 1f; \
 182          tst r0,r0; \
 183      0: .word TLS_PRE_TCB_SIZE; \
 184      1:
 185
 186 #  else
 187 #   if !defined NOT_IN_libc || defined IS_IN_libpthread
 188 #    define SINGLE_THREAD_P \
 189         mov r12,r2; \
 190         mov.l 0f,r12; \
 191         mova 0f,r0; \
 192         add r0,r12; \
 193         mov.l 1f,r0; \
 194         mov.l @(r0,r12),r0; \
 195         mov r2,r12; \
 196         bra 2f; \
 197          tst r0,r0; \
 198         .align 2; \
 199      0: .long _GLOBAL_OFFSET_TABLE_; \
 200      1: .long __local_multiple_threads@GOTOFF; \
 201      2:
 202 #   else
 203 #    define SINGLE_THREAD_P \
 204         mov r12,r2; \
 205         mov.l 0f,r12; \
 206         mova 0f,r0; \
 207         add r0,r12; \
 208         mov.l 1f,r0; \
 209         mov.l @(r0,r12),r0; \
 210         mov.l @r0,r0; \
 211         mov r2,r12; \
 212         bra 2f; \
 213          tst r0,r0; \
 214         .align 2; \
 215      0: .long _GLOBAL_OFFSET_TABLE_; \
 216      1: .long __local_multiple_threads@GOT; \
 217      2:
 218 #   endif
 219 #  endif
 220 # endif
 221
 222 #elif !defined __ASSEMBLER__
 223
 224 /* This code should never be used but we define it anyhow.  */
 225 # define SINGLE_THREAD_P (1)
 226
 227 #endif