nptl/sysdeps/unix/sysv/linux/sparc/sparc64/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, 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 <nptl/pthreadP.h>
  24 #endif
  25
  26 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  27
  28 # undef PSEUDO
  29 # define PSEUDO(name, syscall_name, args)                                     \
  30         .text;                                                                \
  31 ENTRY(name)                                                                   \
  32         ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1;                              \
  33         brnz,pn %g1, 1f;                                                      \
  34 .type   __##syscall_name##_nocancel,@function;                                \
  35 .globl  __##syscall_name##_nocancel;                                          \
  36 __##syscall_name##_nocancel:                                                  \
  37          mov SYS_ify(syscall_name), %g1;                                      \
  38         ta 0x6d;                                                              \
  39         bcs,pn %xcc, __syscall_error_handler;                                 \
  40          nop;                                                                 \
  41 .size   __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;            \
  42         .subsection 2;                                                        \
  43 1:      save %sp, -192, %sp;                                                  \
  44         CENABLE;                                                              \
  45          nop;                                                                 \
  46         mov %o0, %l0;                                                         \
  47         COPY_ARGS_##args                                                      \
  48         mov SYS_ify(syscall_name), %g1;                                       \
  49         ta 0x6d;                                                              \
  50         bcs,pn %xcc, __syscall_error_handler2;                                \
  51          mov %o0, %l1;                                                        \
  52         CDISABLE;                                                             \
  53          mov %l0, %o0;                                                        \
  54         jmpl %i7 + 8, %g0;                                                    \
  55          restore %g0, %l1, %o0;                                               \
  56         .previous;                                                            \
  57         SYSCALL_ERROR_HANDLER                                                 \
  58         SYSCALL_ERROR_HANDLER2
  59
  60 #define SYSCALL_ERROR_HANDLER2                                                \
  61 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler2)                         \
  62         .global __errno_location;                                             \
  63         .type   __errno_location,@function;                                   \
  64         CDISABLE;                                                             \
  65          mov    %l0, %o0;                                                     \
  66         call    __errno_location;                                             \
  67          nop;                                                                 \
  68         st      %l1, [%o0];                                                   \
  69         jmpl    %i7 + 8, %g0;                                                 \
  70          restore %g0, -1, %o0;                                                \
  71         .previous;
  72
  73 # ifdef IS_IN_libpthread
  74 #  define CENABLE       call __pthread_enable_asynccancel
  75 #  define CDISABLE      call __pthread_disable_asynccancel
  76 # elif !defined NOT_IN_libc
  77 #  define CENABLE       call __libc_enable_asynccancel
  78 #  define CDISABLE      call __libc_disable_asynccancel
  79 # elif defined IS_IN_librt
  80 #  define CENABLE       call __librt_enable_asynccancel
  81 #  define CDISABLE      call __librt_disable_asynccancel
  82 # else
  83 #  error Unsupported library
  84 # endif
  85
  86 #define COPY_ARGS_0     /* Nothing */
  87 #define COPY_ARGS_1     COPY_ARGS_0 mov %i0, %o0;
  88 #define COPY_ARGS_2     COPY_ARGS_1 mov %i1, %o1;
  89 #define COPY_ARGS_3     COPY_ARGS_2 mov %i2, %o2;
  90 #define COPY_ARGS_4     COPY_ARGS_3 mov %i3, %o3;
  91 #define COPY_ARGS_5     COPY_ARGS_4 mov %i4, %o4;
  92 #define COPY_ARGS_6     COPY_ARGS_5 mov %i5, %o5;
  93
  94 # ifndef __ASSEMBLER__
  95 #  define SINGLE_THREAD_P \
  96   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
  97                                    header.multiple_threads) == 0, 1)
  98 # else
  99 #  define SINGLE_THREAD_P ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1
 100 # endif
 101
 102 #elif !defined __ASSEMBLER__
 103
 104 # define SINGLE_THREAD_P (1)
 105 # define NO_CANCELLATION 1
 106
 107 #endif