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

   1 /* Copyright (C) 2003-2014 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <tls.h>
  21 #ifndef __ASSEMBLER__
  22 # include <nptl/pthreadP.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  26
  27 # undef PSEUDO
  28 # define PSEUDO(name, syscall_name, args)                                     \
  29         .text;                                                                \
  30 L(pseudo_cancel):                                                             \
  31         cfi_startproc;                                                        \
  32         STM_##args                                                            \
  33         stmg    %r13,%r15,104(%r15);                                          \
  34         cfi_offset (%r15,-40);                                                \
  35         cfi_offset (%r14,-48);                                                \
  36         cfi_offset (%r13,-56);                                                \
  37         lgr     %r14,%r15;                                                    \
  38         aghi    %r15,-160;                                                    \
  39         cfi_adjust_cfa_offset (160);                                          \
  40         stg     %r14,0(%r15);                                                 \
  41         brasl   %r14,CENABLE;                                                 \
  42         lgr     %r0,%r2;                                                      \
  43         LM_##args                                                             \
  44         .if SYS_ify (syscall_name) < 256;                                     \
  45         svc SYS_ify (syscall_name);                                           \
  46         .else;                                                                \
  47         lghi %r1,SYS_ify (syscall_name);                                      \
  48         svc 0;                                                                \
  49         .endif;                                                               \
  50         LR7_##args                                                            \
  51         lgr     %r13,%r2;                                                     \
  52         lgr     %r2,%r0;                                                      \
  53         brasl   %r14,CDISABLE;                                                \
  54         lgr     %r2,%r13;                                                     \
  55         lmg     %r13,%r15,104+160(%r15);                                      \
  56         cfi_endproc;                                                          \
  57         j       L(pseudo_check);                                              \
  58 ENTRY(name)                                                                   \
  59         SINGLE_THREAD_P                                                       \
  60         jne     L(pseudo_cancel);                                             \
  61 .type   __##syscall_name##_nocancel,@function;                                \
  62 .globl  __##syscall_name##_nocancel;                                          \
  63 __##syscall_name##_nocancel:                                                  \
  64         DO_CALL(syscall_name, args);                                          \
  65 L(pseudo_check):                                                              \
  66         lghi    %r4,-4095;                                                    \
  67         clgr    %r2,%r4;                                                      \
  68         jgnl    SYSCALL_ERROR_LABEL;                                          \
  69 .size   __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;            \
  70 L(pseudo_end):
  71
  72 # ifdef IS_IN_libpthread
  73 #  define CENABLE       __pthread_enable_asynccancel
  74 #  define CDISABLE      __pthread_disable_asynccancel
  75 #  define __local_multiple_threads      __pthread_multiple_threads
  76 # elif !defined NOT_IN_libc
  77 #  define CENABLE       __libc_enable_asynccancel
  78 #  define CDISABLE      __libc_disable_asynccancel
  79 #  define __local_multiple_threads      __libc_multiple_threads
  80 # elif defined IS_IN_librt
  81 #  define CENABLE       __librt_enable_asynccancel
  82 #  define CDISABLE      __librt_disable_asynccancel
  83 # else
  84 #  error Unsupported library
  85 # endif
  86
  87 #define STM_0           /* Nothing */
  88 #define STM_1           stg %r2,16(%r15);
  89 #define STM_2           stmg %r2,%r3,16(%r15);
  90 #define STM_3           stmg %r2,%r4,16(%r15);
  91 #define STM_4           stmg %r2,%r5,16(%r15);
  92 #define STM_5           stmg %r2,%r5,16(%r15);
  93 #define STM_6           stmg %r2,%r7,16(%r15);
  94
  95 #define LM_0            /* Nothing */
  96 #define LM_1            lg %r2,16+160(%r15);
  97 #define LM_2            lmg %r2,%r3,16+160(%r15);
  98 #define LM_3            lmg %r2,%r4,16+160(%r15);
  99 #define LM_4            lmg %r2,%r5,16+160(%r15);
 100 #define LM_5            lmg %r2,%r5,16+160(%r15);
 101 #define LM_6            lmg %r2,%r5,16+160(%r15); \
 102                         cfi_offset (%r7, -104); \
 103                         lg %r7,160+160(%r15);
 104
 105 #define LR7_0           /* Nothing */
 106 #define LR7_1           /* Nothing */
 107 #define LR7_2           /* Nothing */
 108 #define LR7_3           /* Nothing */
 109 #define LR7_4           /* Nothing */
 110 #define LR7_5           /* Nothing */
 111 #define LR7_6           lg %r7,56+160(%r15); \
 112                         cfi_restore (%r7);
 113
 114 # if defined IS_IN_libpthread || !defined NOT_IN_libc
 115 #  ifndef __ASSEMBLER__
 116 extern int __local_multiple_threads attribute_hidden;
 117 #   define SINGLE_THREAD_P \
 118   __builtin_expect (__local_multiple_threads == 0, 1)
 119 #  else
 120 #   define SINGLE_THREAD_P \
 121         larl    %r1,__local_multiple_threads;                                 \
 122         icm     %r0,15,0(%r1);
 123 #  endif
 124
 125 # else
 126
 127 #  ifndef __ASSEMBLER__
 128 #   define SINGLE_THREAD_P \
 129   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                               \
 130                                    header.multiple_threads) == 0, 1)
 131 #  else
 132 #   define SINGLE_THREAD_P \
 133         ear     %r1,%a0;                                                      \
 134         sllg    %r1,%r1,32;                                                   \
 135         ear     %r1,%a1;                                                      \
 136         icm     %r1,15,MULTIPLE_THREADS_OFFSET(%r1);
 137 #  endif
 138
 139 # endif
 140
 141 #elif !defined __ASSEMBLER__
 142
 143 # define SINGLE_THREAD_P (1)
 144 # define NO_CANCELLATION 1
 145
 146 #endif
 147
 148 #ifndef __ASSEMBLER__
 149 # define RTLD_SINGLE_THREAD_P \
 150   __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
 151                                    header.multiple_threads) == 0, 1)
 152 #endif