nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h

   1 /* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   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 L(pseudo_cancel):                                                             \
  32         cfi_startproc;                                                        \
  33         STM_##args                                                            \
  34         stmg    %r13,%r15,104(%r15);                                          \
  35         cfi_offset (%r15,-40);                                                \
  36         cfi_offset (%r14,-48);                                                \
  37         cfi_offset (%r13,-56);                                                \
  38         lgr     %r14,%r15;                                                    \
  39         aghi    %r15,-160;                                                    \
  40         cfi_adjust_cfa_offset (160);                                          \
  41         stg     %r14,0(%r15);                                                 \
  42         brasl   %r14,CENABLE;                                                 \
  43         lgr     %r0,%r2;                                                      \
  44         LM_##args                                                             \
  45         DO_CALL(syscall_name, args);                                          \
  46         lgr     %r13,%r2;                                                     \
  47         lgr     %r2,%r0;                                                      \
  48         brasl   %r14,CDISABLE;                                                \
  49         lgr     %r2,%r13;                                                     \
  50         lmg     %r13,%r15,104+160(%r15);                                      \
  51         cfi_endproc;                                                          \
  52         j       L(pseudo_check);                                              \
  53 ENTRY(name)                                                                   \
  54         SINGLE_THREAD_P                                                       \
  55         jne     L(pseudo_cancel);                                             \
  56 .type   __##syscall_name##_nocancel,@function;                                \
  57 .globl  __##syscall_name##_nocancel;                                          \
  58 __##syscall_name##_nocancel:                                                  \
  59         DO_CALL(syscall_name, args);                                          \
  60 L(pseudo_check):                                                              \
  61         lghi    %r4,-4095;                                                    \
  62         clgr    %r2,%r4;                                                      \
  63         jgnl    SYSCALL_ERROR_LABEL;                                          \
  64 .size   __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;            \
  65 L(pseudo_end):
  66
  67 # ifdef IS_IN_libpthread
  68 #  define CENABLE       __pthread_enable_asynccancel
  69 #  define CDISABLE      __pthread_disable_asynccancel
  70 #  define __local_multiple_threads      __pthread_multiple_threads
  71 # elif !defined NOT_IN_libc
  72 #  define CENABLE       __libc_enable_asynccancel
  73 #  define CDISABLE      __libc_disable_asynccancel
  74 #  define __local_multiple_threads      __libc_multiple_threads
  75 # elif defined IS_IN_librt
  76 #  define CENABLE       __librt_enable_asynccancel
  77 #  define CDISABLE      __librt_disable_asynccancel
  78 # else
  79 #  error Unsupported library
  80 # endif
  81
  82 #define STM_0           /* Nothing */
  83 #define STM_1           stg %r2,16(%r15);
  84 #define STM_2           stmg %r2,%r3,16(%r15);
  85 #define STM_3           stmg %r2,%r4,16(%r15);
  86 #define STM_4           stmg %r2,%r5,16(%r15);
  87 #define STM_5           stmg %r2,%r5,16(%r15);
  88
  89 #define LM_0            /* Nothing */
  90 #define LM_1            lg %r2,16+160(%r15);
  91 #define LM_2            lmg %r2,%r3,16+160(%r15);
  92 #define LM_3            lmg %r2,%r4,16+160(%r15);
  93 #define LM_4            lmg %r2,%r5,16+160(%r15);
  94 #define LM_5            lmg %r2,%r5,16+160(%r15);
  95
  96 # if defined IS_IN_libpthread || !defined NOT_IN_libc
  97 #  ifndef __ASSEMBLER__
  98 extern int __local_multiple_threads attribute_hidden;
  99 #   define SINGLE_THREAD_P \
 100   __builtin_expect (__local_multiple_threads == 0, 1)
 101 #  else
 102 #   define SINGLE_THREAD_P \
 103         larl    %r1,__local_multiple_threads;                                 \
 104         icm     %r0,15,0(%r1);
 105 #  endif
 106
 107 # else
 108
 109 #  ifndef __ASSEMBLER__
 110 #   define SINGLE_THREAD_P \
 111   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
 112                                    header.multiple_threads) == 0, 1)
 113 #  else
 114 #   define SINGLE_THREAD_P \
 115         ear     %r1,%a0;                                                      \
 116         sllg    %r1,%r1,32;                                                   \
 117         ear     %r1,%a1;                                                      \
 118         icm     %r1,15,MULTIPLE_THREADS_OFFSET(%r1);
 119 #  endif
 120
 121 # endif
 122
 123 #elif !defined __ASSEMBLER__
 124
 125 # define SINGLE_THREAD_P (1)
 126 # define NO_CANCELLATION 1
 127
 128 #endif
 129
 130 #ifndef __ASSEMBLER__
 131 # define RTLD_SINGLE_THREAD_P \
 132   __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
 133                                    header.multiple_threads) == 0, 1)
 134 #endif