nptl/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 #ifndef __ASSEMBLER__
  22 # include <nptl/pthreadP.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  26
  27 # define _IMM12 #-12
  28 # define _IMM16 #-16
  29 # define _IMP16 #16
  30 # undef PSEUDO
  31 # define PSEUDO(name, syscall_name, args) \
  32   .text; \
  33   ENTRY (name); \
  34   .Lpseudo_start: \
  35     SINGLE_THREAD_P; \
  36     bf .Lpseudo_cancel; \
  37     .type __##syscall_name##_nocancel,@function; \
  38     .globl __##syscall_name##_nocancel; \
  39     __##syscall_name##_nocancel: \
  40     DO_CALL (syscall_name, args); \
  41     mov r0,r1; \
  42     mov _IMM12,r2; \
  43     shad r2,r1; \
  44     not r1,r1; \
  45     tst r1,r1; \
  46     bt .Lsyscall_error; \
  47     bra .Lpseudo_end; \
  48      nop; \
  49     .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
  50  .Lpseudo_cancel: \
  51     sts.l pr,@-r15; \
  52  .LCFI0: \
  53     add _IMM16,r15; \
  54     SAVE_ARGS_##args; \
  55  .LCFI1: \
  56     CENABLE; \
  57     LOAD_ARGS_##args; \
  58     add _IMP16,r15; \
  59  .LCFI2: \
  60     lds.l @r15+,pr; \
  61  .LCFI3: \
  62     DO_CALL(syscall_name, args); \
  63     SYSCALL_INST_PAD; \
  64     sts.l pr,@-r15; \
  65  .LCFI4: \
  66     mov.l r0,@-r15; \
  67  .LCFI5: \
  68     CDISABLE; \
  69     mov.l @r15+,r0; \
  70  .LCFI6: \
  71     lds.l @r15+,pr; \
  72  .LCFI7: \
  73     mov r0,r1; \
  74     mov _IMM12,r2; \
  75     shad r2,r1; \
  76     not r1,r1; \
  77     tst r1,r1; \
  78     bf .Lpseudo_end; \
  79  .Lsyscall_error: \
  80     SYSCALL_ERROR_HANDLER; \
  81  .Lpseudo_end: \
  82  /* Create unwinding information for the syscall wrapper.  */ \
  83  .section .eh_frame,"a",@progbits; \
  84  .Lframe1: \
  85     .ualong .LECIE1-.LSCIE1; \
  86  .LSCIE1: \
  87     .ualong 0x0; \
  88     .byte   0x1; \
  89     AUGMENTATION_STRING; \
  90     .uleb128 0x1; \
  91     .sleb128 -4; \
  92     .byte   0x11; \
  93     AUGMENTATION_PARAM; \
  94     .byte   0xc; \
  95     .uleb128 0xf; \
  96     .uleb128 0x0; \
  97     .align 2; \
  98  .LECIE1: \
  99  .LSFDE1: \
 100     .ualong .LEFDE1-.LASFDE1; \
 101  .LASFDE1: \
 102     .ualong .LASFDE1-.Lframe1; \
 103     START_SYMBOL_REF; \
 104     .ualong .Lpseudo_end - .Lpseudo_start; \
 105     AUGMENTATION_PARAM_FDE; \
 106     .byte   0x4; \
 107     .ualong .LCFI0-.Lpseudo_start; \
 108     .byte   0xe; \
 109     .uleb128 0x4; \
 110     .byte   0x91; \
 111     .uleb128 0x1; \
 112     .byte   0x4; \
 113     .ualong .LCFI1-.LCFI0; \
 114     .byte   0xe; \
 115     .uleb128 0x14; \
 116     FRAME_REG_##args; \
 117     .byte   0x4; \
 118     .ualong .LCFI2-.LCFI1; \
 119     .byte   0xe; \
 120     .uleb128 0x4; \
 121     .byte   0x4; \
 122     .ualong .LCFI3-.LCFI2; \
 123     .byte   0xe; \
 124     .uleb128 0x0; \
 125     .byte   0xd1; \
 126     .byte   0x4; \
 127     .ualong .LCFI4-.LCFI3; \
 128     .byte   0xe; \
 129     .uleb128 0x4; \
 130     .byte   0x91; \
 131     .uleb128 0x1; \
 132     .byte   0x4; \
 133     .ualong .LCFI5-.LCFI4; \
 134     .byte   0xe; \
 135     .uleb128 0x8; \
 136     .byte   0x80; \
 137     .uleb128 0x2; \
 138     .byte   0x4; \
 139     .ualong .LCFI6-.LCFI5; \
 140     .byte   0xe; \
 141     .uleb128 0x4; \
 142     .byte   0xc0; \
 143     .byte   0x4; \
 144     .ualong .LCFI7-.LCFI6; \
 145     .byte   0xe; \
 146     .uleb128 0x0; \
 147     .byte   0xd1; \
 148     .align 2; \
 149  .LEFDE1: \
 150  .previous
 151
 152 # ifdef SHARED
 153 #  define AUGMENTATION_STRING .string "zR"
 154 #  define AUGMENTATION_PARAM .uleb128 1; .byte 0x1b
 155 #  define AUGMENTATION_PARAM_FDE .uleb128 0
 156 #  define START_SYMBOL_REF .long .Lpseudo_start-.
 157 # else
 158 #  define AUGMENTATION_STRING .ascii "\0"
 159 #  define AUGMENTATION_PARAM
 160 #  define AUGMENTATION_PARAM_FDE
 161 #  define START_SYMBOL_REF .long .Lpseudo_start
 162 # endif
 163
 164 # define FRAME_REG_0    /* Nothing.  */
 165 # define FRAME_REG_1    FRAME_REG_0; .byte 0x84; .uleb128 5
 166 # define FRAME_REG_2    FRAME_REG_1; .byte 0x85; .uleb128 4
 167 # define FRAME_REG_3    FRAME_REG_2; .byte 0x86; .uleb128 3
 168 # define FRAME_REG_4    FRAME_REG_3; .byte 0x87; .uleb128 2
 169 # define FRAME_REG_5    FRAME_REG_4
 170 # define FRAME_REG_6    FRAME_REG_5
 171
 172 # undef PSEUDO_END
 173 # define PSEUDO_END(sym) \
 174   END (sym)
 175
 176 # define SAVE_ARGS_0    /* Nothing.  */
 177 # define SAVE_ARGS_1    SAVE_ARGS_0; mov.l r4,@(0,r15)
 178 # define SAVE_ARGS_2    SAVE_ARGS_1; mov.l r5,@(4,r15)
 179 # define SAVE_ARGS_3    SAVE_ARGS_2; mov.l r6,@(8,r15)
 180 # define SAVE_ARGS_4    SAVE_ARGS_3; mov.l r7,@(12,r15)
 181 # define SAVE_ARGS_5    SAVE_ARGS_4
 182 # define SAVE_ARGS_6    SAVE_ARGS_5
 183
 184 # define LOAD_ARGS_0    /* Nothing.  */
 185 # define LOAD_ARGS_1    LOAD_ARGS_0; mov.l @(0,r15),r4
 186 # define LOAD_ARGS_2    LOAD_ARGS_1; mov.l @(4,r15),r5
 187 # define LOAD_ARGS_3    LOAD_ARGS_2; mov.l @(8,r15),r6
 188 # define LOAD_ARGS_4    LOAD_ARGS_3; mov.l @(12,r15),r7
 189 # define LOAD_ARGS_5    LOAD_ARGS_4
 190 # define LOAD_ARGS_6    LOAD_ARGS_5
 191
 192 # ifdef IS_IN_libpthread
 193 #  define __local_enable_asynccancel    __pthread_enable_asynccancel
 194 #  define __local_disable_asynccancel   __pthread_disable_asynccancel
 195 # elif !defined NOT_IN_libc
 196 #  define __local_enable_asynccancel    __libc_enable_asynccancel
 197 #  define __local_disable_asynccancel   __libc_disable_asynccancel
 198 # elif defined IS_IN_librt
 199 #  define __local_enable_asynccancel    __librt_enable_asynccancel
 200 #  define __local_disable_asynccancel   __librt_disable_asynccancel
 201 # else
 202 #  error Unsupported library
 203 # endif
 204
 205 # define CENABLE \
 206         mov.l 1f,r0; \
 207         bsrf r0; \
 208          nop; \
 209      0: bra 2f; \
 210          mov r0,r2; \
 211         .align 2; \
 212      1: .long __local_enable_asynccancel - 0b; \
 213      2:
 214
 215 # define CDISABLE \
 216         mov.l 1f,r0; \
 217         bsrf r0; \
 218          mov r2,r4; \
 219      0: bra 2f; \
 220          nop; \
 221         .align 2; \
 222      1: .long __local_disable_asynccancel - 0b; \
 223      2:
 224
 225 # ifndef __ASSEMBLER__
 226 #  define SINGLE_THREAD_P \
 227   __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
 228                                    header.multiple_threads) == 0, 1)
 229 # else
 230 #  define SINGLE_THREAD_P \
 231         stc gbr,r0; \
 232         mov.w 0f,r1; \
 233         sub r1,r0; \
 234         mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
 235         bra 1f; \
 236          tst r0,r0; \
 237      0: .word TLS_PRE_TCB_SIZE; \
 238      1:
 239
 240 # endif
 241
 242 #elif !defined __ASSEMBLER__
 243
 244 # define SINGLE_THREAD_P (1)
 245 # define NO_CANCELLATION 1
 246
 247 #endif