sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S

   1 /* Copyright (C) 2000-2014 Free Software Foundation, Inc.
   2    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   3    This file is part of the GNU C Library.
   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
  22 /* The following code is only used in the shared library when we
  23    compile the reentrant version.  Otherwise each system call defines
  24    each own version.  */
  25
  26 /* The syscall stubs jump here when they detect an error.  */
  27
  28 #undef CALL_MCOUNT
  29 #define CALL_MCOUNT
  30
  31         .text
  32 ENTRY(__syscall_error)
  33 #ifndef PIC
  34 # ifndef NOT_IN_libc
  35 #  define SYSCALL_ERROR_ERRNO __libc_errno
  36 # else
  37 #  define SYSCALL_ERROR_ERRNO errno
  38 # endif
  39         basr    %r1,0
  40 0:      l       %r1,1f-0b(%r1)
  41         ear     %r3,%a0
  42         lcr     %r2,%r2
  43         st      %r2,0(%r1,%r3)
  44         lhi     %r2,-1
  45         br      %r14
  46 1:      .long   SYSCALL_ERROR_ERRNO@ntpoff
  47 #else
  48 # if RTLD_PRIVATE_ERRNO
  49         basr    %r1,0
  50 0:      al      %r1,1f-0b(%r1)
  51         lcr     %r2,%r2
  52         st      %r2,0(%r1)
  53         lhi     %r2,-1
  54         br      %r14
  55 1:      .long   rtld_errno - 0b
  56 # else
  57 #  ifndef NOT_IN_libc
  58 #   define SYSCALL_ERROR_ERRNO __libc_errno
  59 #  else
  60 #   define SYSCALL_ERROR_ERRNO errno
  61 #  endif
  62         basr    %r1,0
  63 0:      al      %r1,1f-0b(%r1)
  64         ear     %r3,%a0
  65         l       %r1,SYSCALL_ERROR_ERRNO@gotntpoff(%r1)
  66         lcr     %r2,%r2
  67         st      %r2,0(%r1,%r3)
  68         lhi     %r2,-1
  69         br      %r14
  70 1:      .long   _GLOBAL_OFFSET_TABLE_-0b
  71 # endif
  72 #endif
  73
  74 END (__syscall_error)