nptl/sysdeps/unix/sysv/linux/s390/s390-32/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         stm     %r12,%r15,48(%r15);                                           \
  35         cfi_offset (%r15, -36);                                               \
  36         cfi_offset (%r14, -40);                                               \
  37         cfi_offset (%r13, -44);                                               \
  38         cfi_offset (%r12, -48);                                               \
  39         lr      %r14,%r15;                                                    \
  40         ahi     %r15,-96;                                                     \
  41         cfi_adjust_cfa_offset (96);                                           \
  42         st      %r14,0(%r15);                                                 \
  43         basr    %r13,0;                                                       \
  44 0:      l       %r1,1f-0b(%r13);                                              \
  45         bas     %r14,0(%r1,%r13);                                             \
  46         lr      %r0,%r2;                                                      \
  47         LM_##args                                                             \
  48         DO_CALL(syscall_name, args);                                          \
  49         l       %r1,2f-0b(%r13);                                              \
  50         lr      %r12,%r2;                                                     \
  51         lr      %r2,%r0;                                                      \
  52         bas     %r14,0(%r1,%r13);                                             \
  53         lr      %r2,%r12;                                                     \
  54         lm      %r12,%r15,48+96(%r15);                                        \
  55         cfi_endproc;                                                          \
  56         j       L(pseudo_check);                                              \
  57 1:      .long   CENABLE-0b;                                                   \
  58 2:      .long   CDISABLE-0b;                                                  \
  59 ENTRY(name)                                                                   \
  60         SINGLE_THREAD_P(%r1)                                                  \
  61         jne     L(pseudo_cancel);                                             \
  62 .type   __##syscall_name##_nocancel,@function;                                \
  63 .globl  __##syscall_name##_nocancel;                                          \
  64 __##syscall_name##_nocancel:                                                  \
  65         DO_CALL(syscall_name, args);                                          \
  66 L(pseudo_check):                                                              \
  67         lhi     %r4,-4095;                                                    \
  68         clr     %r2,%r4;                                                      \
  69         jnl     SYSCALL_ERROR_LABEL;                                          \
  70 .size   __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;            \
  71 L(pseudo_end):
  72
  73 # ifdef IS_IN_libpthread
  74 #  define CENABLE       __pthread_enable_asynccancel
  75 #  define CDISABLE      __pthread_disable_asynccancel
  76 # elif !defined NOT_IN_libc
  77 #  define CENABLE       __libc_enable_asynccancel
  78 #  define CDISABLE      __libc_disable_asynccancel
  79 # elif defined IS_IN_librt
  80 #  define CENABLE       __librt_enable_asynccancel
  81 #  define CDISABLE      __librt_disable_asynccancel
  82 # else
  83 #  error Unsupported library
  84 # endif
  85
  86 #define STM_0           /* Nothing */
  87 #define STM_1           st %r2,8(%r15);
  88 #define STM_2           stm %r2,%r3,8(%r15);
  89 #define STM_3           stm %r2,%r4,8(%r15);
  90 #define STM_4           stm %r2,%r5,8(%r15);
  91 #define STM_5           stm %r2,%r5,8(%r15);
  92
  93 #define LM_0            /* Nothing */
  94 #define LM_1            l %r2,8+96(%r15);
  95 #define LM_2            lm %r2,%r3,8+96(%r15);
  96 #define LM_3            lm %r2,%r4,8+96(%r15);
  97 #define LM_4            lm %r2,%r5,8+96(%r15);
  98 #define LM_5            lm %r2,%r5,8+96(%r15);
  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(reg) \
 106         ear     reg,%a0;                                                      \
 107         icm     reg,15,MULTIPLE_THREADS_OFFSET(reg);
 108 # endif
 109
 110 #elif !defined __ASSEMBLER__
 111
 112 # ifdef IS_IN_rtld
 113 #  define SINGLE_THREAD_P \
 114   __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
 115                                    header.multiple_threads) == 0, 1)
 116 # else
 117 #  define SINGLE_THREAD_P (1)
 118 # endif
 119 # define NO_CANCELLATION 1
 120
 121 #endif