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