ports/sysdeps/unix/am33/sysdep.S

   1 /* Copyright (C) 1991-2013 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Alexandre Oliva <aoliva@redhat.com>.
   4    Based on ../i386/sysdep.S.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sysdep.h>
  21 #define _ERRNO_H
  22 #include <bits/errno.h>
  23
  24 .globl C_SYMBOL_NAME(errno)
  25 .globl syscall_error
  26
  27 #undef syscall_error
  28 #ifdef NO_UNDERSCORES
  29 __syscall_error:
  30 #else
  31 syscall_error:
  32 #endif
  33 #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
  34         /* We translate the system's EWOULDBLOCK error into EAGAIN.
  35            The GNU C library always defines EWOULDBLOCK==EAGAIN.
  36            EWOULDBLOCK_sys is the original number.  */
  37         cmp EWOULDBLOCK_sys,d0  /* Is it the old EWOULDBLOCK?  */
  38         bne .Lnotb              /* Branch if not.  */
  39         mov EAGAIN,d0           /* Yes; translate it to EAGAIN.  */
  40 .Lnotb:
  41 #endif
  42 #ifndef PIC
  43 # ifndef _LIBC_REENTRANT
  44         mov d0,(C_SYMBOL_NAME (errno))
  45 # else
  46         movm [d2],(sp)
  47         add -12,sp
  48         mov d0,d2
  49         call __errno_location,[],0
  50         mov d2,(a0)
  51         add 12,sp
  52         movm (sp),[d2]
  53 # endif
  54 #else
  55 # error "This shouldn't be assembled for PIC"
  56 #endif
  57         mov -1,d0
  58         mov d0,a0
  59         ret
  60
  61 #undef  __syscall_error
  62 END (__syscall_error)