libpthread/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc32/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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <tls.h>
  20 #ifndef __ASSEMBLER__
  21 # include <linuxthreads/internals.h>
  22 #endif
  23
  24 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  25
  26 # undef PSEUDO
  27 # define PSEUDO(name, syscall_name, args)                                     \
  28         .text;                                                                \
  29 ENTRY(name)                                                                   \
  30         ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1;                              \
  31         cmp %g1, 0;                                                           \
  32         bne 1f;                                                               \
  33          mov SYS_ify(syscall_name), %g1;                                      \
  34         ta 0x10;                                                              \
  35         bcs __syscall_error_handler;                                          \
  36          nop;                                                                 \
  37         .subsection 2;                                                        \
  38 1:      save %sp, -96, %sp;                                                   \
  39         CENABLE;                                                              \
  40          nop;                                                                 \
  41         mov %o0, %l0;                                                         \
  42         COPY_ARGS_##args                                                      \
  43         mov SYS_ify(syscall_name), %g1;                                       \
  44         ta 0x10;                                                              \
  45         bcs __syscall_error_handler2;                                         \
  46          mov %o0, %l1;                                                        \
  47         CDISABLE;                                                             \
  48          mov %l0, %o0;                                                        \
  49         jmpl %i7 + 8, %g0;                                                    \
  50          restore %g0, %l1, %o0;                                               \
  51         .previous;                                                            \
  52         SYSCALL_ERROR_HANDLER                                                 \
  53         SYSCALL_ERROR_HANDLER2
  54
  55 #define SYSCALL_ERROR_HANDLER2                                                \
  56 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler2)                         \
  57         .global __errno_location;                                             \
  58         .type   __errno_location,@function;                                   \
  59         CDISABLE;                                                             \
  60          mov    %l0, %o0;                                                     \
  61         call    __errno_location;                                             \
  62          nop;                                                                 \
  63         st      %l1, [%o0];                                                   \
  64         jmpl    %i7 + 8, %g0;                                                 \
  65          restore %g0, -1, %o0;                                                \
  66         .previous;
  67
  68 # ifdef IS_IN_libpthread
  69 #  define CENABLE       call __pthread_enable_asynccancel
  70 #  define CDISABLE      call __pthread_disable_asynccancel
  71 # elif !defined NOT_IN_libc
  72 #  define CENABLE       call __libc_enable_asynccancel
  73 #  define CDISABLE      call __libc_disable_asynccancel
  74 # else
  75 #  define CENABLE       call __librt_enable_asynccancel
  76 #  define CDISABLE      call __librt_disable_asynccancel
  77 # endif
  78
  79 #define COPY_ARGS_0     /* Nothing */
  80 #define COPY_ARGS_1     COPY_ARGS_0 mov %i0, %o0;
  81 #define COPY_ARGS_2     COPY_ARGS_1 mov %i1, %o1;
  82 #define COPY_ARGS_3     COPY_ARGS_2 mov %i2, %o2;
  83 #define COPY_ARGS_4     COPY_ARGS_3 mov %i3, %o3;
  84 #define COPY_ARGS_5     COPY_ARGS_4 mov %i4, %o4;
  85 #define COPY_ARGS_6     COPY_ARGS_5 mov %i5, %o5;
  86
  87 # ifndef __ASSEMBLER__
  88 #  define SINGLE_THREAD_P \
  89   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
  90                                    p_header.data.multiple_threads) == 0, 1)
  91 # else
  92 #  define SINGLE_THREAD_P ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1
  93 # endif
  94
  95 #elif !defined __ASSEMBLER__
  96
  97 /* This code should never be used but we define it anyhow.  */
  98 # define SINGLE_THREAD_P (1)
  99
 100 #endif