l4/pkg/uclibc/lib/contrib/uclibc/libpthread/linuxthreads/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h

   1 /* Copyright (C) 2002, 2003 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <tls.h>
  21 #ifndef __ASSEMBLER__
  22 # include <linuxthreads/internals.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  26
  27 # ifdef IS_IN_librt
  28 #  define PSEUDO_NLOCAL         6
  29 #  define PSEUDO_SAVE_GP        mov loc5 = gp
  30 #  define PSEUDO_RESTORE_GP     mov gp = loc5
  31 #  define PSEUDO_SAVE_GP_1
  32 #  define PSEUDO_RESTORE_GP_1   mov gp = loc5
  33 # else
  34 #  define PSEUDO_NLOCAL         5
  35 #  define PSEUDO_SAVE_GP
  36 #  define PSEUDO_RESTORE_GP
  37 #  define PSEUDO_SAVE_GP_1      mov loc4 = gp;;
  38 #  define PSEUDO_RESTORE_GP_1   mov gp = loc4
  39 # endif
  40
  41 # undef PSEUDO
  42 # define PSEUDO(name, syscall_name, args)                                     \
  43 .text;                                                                        \
  44 ENTRY (name)                                                                  \
  45      adds r14 = MULTIPLE_THREADS_OFFSET, r13;;                                \
  46      ld4 r14 = [r14];                                                         \
  47      mov r15 = SYS_ify(syscall_name);;                                        \
  48      cmp4.ne p6, p7 = 0, r14;                                                 \
  49 (p6) br.cond.spnt .Lpseudo_cancel;;                                           \
  50      break __BREAK_SYSCALL;;                                                  \
  51      cmp.eq p6,p0=-1,r10;                                                     \
  52 (p6) br.cond.spnt.few __syscall_error;                                        \
  53      ret;;                                                                    \
  54      .endp name;                                                              \
  55      .proc __GC_##name;                                                       \
  56      .globl __GC_##name;                                                      \
  57      .hidden __GC_##name;                                                     \
  58 __GC_##name:                                                                  \
  59 .Lpseudo_cancel:                                                              \
  60      .prologue;                                                               \
  61      .regstk args, PSEUDO_NLOCAL, args, 0;                                    \
  62      .save ar.pfs, loc0;                                                      \
  63      alloc loc0 = ar.pfs, args, PSEUDO_NLOCAL, args, 0;                       \
  64      .save rp, loc1;                                                          \
  65      mov loc1 = rp;                                                           \
  66      PSEUDO_SAVE_GP;;                                                         \
  67      .body;                                                                   \
  68      CENABLE;;                                                                \
  69      PSEUDO_RESTORE_GP;                                                       \
  70      mov loc2 = r8;                                                           \
  71      COPY_ARGS_##args                                                         \
  72      mov r15 = SYS_ify(syscall_name);                                         \
  73      break __BREAK_SYSCALL;;                                                  \
  74      mov loc3 = r8;                                                           \
  75      mov loc4 = r10;                                                          \
  76      mov out0 = loc2;                                                         \
  77      CDISABLE;;                                                               \
  78      PSEUDO_RESTORE_GP;                                                       \
  79      cmp.eq p6,p0=-1,loc4;                                                    \
  80 (p6) br.cond.spnt.few __syscall_error_##args;                                 \
  81      mov r8 = loc3;                                                           \
  82      mov rp = loc1;                                                           \
  83      mov ar.pfs = loc0;                                                       \
  84 .Lpseudo_end:                                                                 \
  85      ret;                                                                     \
  86      .endp __GC_##name;                                                       \
  87 .section .gnu.linkonce.t.__syscall_error_##args, "ax";                        \
  88      .align 32;                                                               \
  89      .proc __syscall_error_##args;                                            \
  90      .global __syscall_error_##args;                                          \
  91      .hidden __syscall_error_##args;                                          \
  92      .size __syscall_error_##args, 64;                                        \
  93 __syscall_error_##args:                                                       \
  94      .prologue;                                                               \
  95      .regstk args, PSEUDO_NLOCAL, args, 0;                                    \
  96      .save ar.pfs, loc0;                                                      \
  97      .save rp, loc1;                                                          \
  98      .body;                                                                   \
  99      PSEUDO_SAVE_GP_1;                                                        \
 100      br.call.sptk.many b0 = __errno_location;;                                \
 101      st4 [r8] = loc3;                                                         \
 102      PSEUDO_RESTORE_GP_1;                                                     \
 103      mov rp = loc1;                                                           \
 104      mov r8 = -1;                                                             \
 105      mov ar.pfs = loc0
 106
 107 #undef PSEUDO_END
 108 #define PSEUDO_END(name) .endp
 109
 110 # ifdef IS_IN_libpthread
 111 #  define CENABLE       br.call.sptk.many b0 = __pthread_enable_asynccancel
 112 #  define CDISABLE      br.call.sptk.many b0 = __pthread_disable_asynccancel
 113 # elif !defined NOT_IN_libc
 114 #  define CENABLE       br.call.sptk.many b0 = __libc_enable_asynccancel
 115 #  define CDISABLE      br.call.sptk.many b0 = __libc_disable_asynccancel
 116 # else
 117 #  define CENABLE       br.call.sptk.many b0 = __librt_enable_asynccancel
 118 #  define CDISABLE      br.call.sptk.many b0 = __librt_disable_asynccancel
 119 # endif
 120
 121 #define COPY_ARGS_0     /* Nothing */
 122 #define COPY_ARGS_1     COPY_ARGS_0 mov out0 = in0;
 123 #define COPY_ARGS_2     COPY_ARGS_1 mov out1 = in1;
 124 #define COPY_ARGS_3     COPY_ARGS_2 mov out2 = in2;
 125 #define COPY_ARGS_4     COPY_ARGS_3 mov out3 = in3;
 126 #define COPY_ARGS_5     COPY_ARGS_4 mov out4 = in4;
 127 #define COPY_ARGS_6     COPY_ARGS_5 mov out5 = in5;
 128 #define COPY_ARGS_7     COPY_ARGS_6 mov out6 = in6;
 129
 130 # ifndef __ASSEMBLER__
 131 #  define SINGLE_THREAD_P \
 132   __builtin_expect (THREAD_GETMEM (THREAD_SELF, p_multiple_threads) == 0, 1)
 133 # else
 134 #  define SINGLE_THREAD_P \
 135   adds r14 = MULTIPLE_THREADS_OFFSET, r13 ;; ld4 r14 = [r14] ;; cmp4.ne p6, p7 = 0, r14
 136 # endif
 137
 138 #elif !defined __ASSEMBLER__
 139
 140 /* This code should never be used but we define it anyhow.  */
 141 # define SINGLE_THREAD_P (1)
 142
 143 #endif