nptl/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, 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         cmp %g1, 0;                                                           \
  34         bne 1f;                                                               \
  35 .type   __##syscall_name##_nocancel,@function;                                \
  36 .globl  __##syscall_name##_nocancel;                                          \
  37 __##syscall_name##_nocancel:                                                  \
  38          mov SYS_ify(syscall_name), %g1;                                      \
  39         ta 0x10;                                                              \
  40         bcs __syscall_error_handler;                                          \
  41          nop;                                                                 \
  42 .size   __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;            \
  43         .subsection 2;                                                        \
  44         cfi_startproc;                                                        \
  45 1:      save %sp, -96, %sp;                                                   \
  46         cfi_def_cfa_register (%fp);                                           \
  47         cfi_window_save;                                                      \
  48         cfi_register (%o7, %i7);                                              \
  49         CENABLE;                                                              \
  50          nop;                                                                 \
  51         mov %o0, %l0;                                                         \
  52         COPY_ARGS_##args                                                      \
  53         mov SYS_ify(syscall_name), %g1;                                       \
  54         ta 0x10;                                                              \
  55         bcs __syscall_error_handler2;                                         \
  56          mov %o0, %l1;                                                        \
  57         CDISABLE;                                                             \
  58          mov %l0, %o0;                                                        \
  59         jmpl %i7 + 8, %g0;                                                    \
  60          restore %g0, %l1, %o0;                                               \
  61         cfi_endproc;                                                          \
  62         .previous;                                                            \
  63         SYSCALL_ERROR_HANDLER                                                 \
  64         SYSCALL_ERROR_HANDLER2
  65
  66 #define SYSCALL_ERROR_HANDLER2                                                \
  67 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler2)                         \
  68         .global __errno_location;                                             \
  69         .type   __errno_location,@function;                                   \
  70         CDISABLE;                                                             \
  71          mov    %l0, %o0;                                                     \
  72         call    __errno_location;                                             \
  73          nop;                                                                 \
  74         st      %l1, [%o0];                                                   \
  75         jmpl    %i7 + 8, %g0;                                                 \
  76          restore %g0, -1, %o0;                                                \
  77         .previous;
  78
  79 # ifdef IS_IN_libpthread
  80 #  define CENABLE       call __pthread_enable_asynccancel
  81 #  define CDISABLE      call __pthread_disable_asynccancel
  82 # elif !defined NOT_IN_libc
  83 #  define CENABLE       call __libc_enable_asynccancel
  84 #  define CDISABLE      call __libc_disable_asynccancel
  85 # elif defined IS_IN_librt
  86 #  define CENABLE       call __librt_enable_asynccancel
  87 #  define CDISABLE      call __librt_disable_asynccancel
  88 # else
  89 #  error Unsupported library
  90 # endif
  91
  92 #define COPY_ARGS_0     /* Nothing */
  93 #define COPY_ARGS_1     COPY_ARGS_0 mov %i0, %o0;
  94 #define COPY_ARGS_2     COPY_ARGS_1 mov %i1, %o1;
  95 #define COPY_ARGS_3     COPY_ARGS_2 mov %i2, %o2;
  96 #define COPY_ARGS_4     COPY_ARGS_3 mov %i3, %o3;
  97 #define COPY_ARGS_5     COPY_ARGS_4 mov %i4, %o4;
  98 #define COPY_ARGS_6     COPY_ARGS_5 mov %i5, %o5;
  99
 100 # ifndef __ASSEMBLER__
 101 #  define SINGLE_THREAD_P \
 102   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
 103                                    header.multiple_threads) == 0, 1)
 104 # else
 105 #  define SINGLE_THREAD_P ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1
 106 # endif
 107
 108 #elif !defined __ASSEMBLER__
 109
 110 # define SINGLE_THREAD_P (1)
 111 # define NO_CANCELLATION 1
 112
 113 #endif