sysdeps/unix/sysv/linux/m68k/sysdep.S

   1 /* Copyright (C) 1996-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20
  21 /* The following code is only used in the shared library when we
  22    compile the reentrant version.  Otherwise each system call defines
  23    each own version.  */
  24
  25 #ifndef PIC
  26
  27 /* The syscall stubs jump here when they detect an error.  */
  28
  29 #undef CALL_MCOUNT
  30 #define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %d0.  */
  31
  32         .text
  33 ENTRY (__syscall_error)
  34         neg.l %d0
  35 #ifndef _LIBC_REENTRANT
  36         move.l %d0, errno
  37 #else
  38         move.l %d0, -(%sp)
  39         cfi_adjust_cfa_offset (4)
  40         jbsr __errno_location
  41         move.l (%sp)+, (%a0)
  42         cfi_adjust_cfa_offset (-4)
  43 #endif
  44         move.l #-1, %d0
  45         /* Copy return value to %a0 for syscalls that are declared to
  46            return a pointer.  */
  47         move.l %d0, %a0
  48         rts
  49 END (__syscall_error)
  50 #endif /* PIC */