ports/sysdeps/unix/am33/sysdep.S

   1 /* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000, 2001
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Alexandre Oliva <aoliva@redhat.com>.
   5    Based on ../i386/sysdep.S.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library.  If not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include <sysdep.h>
  22 #define _ERRNO_H
  23 #include <bits/errno.h>
  24
  25 .globl C_SYMBOL_NAME(errno)
  26 .globl syscall_error
  27
  28 #undef syscall_error
  29 #ifdef NO_UNDERSCORES
  30 __syscall_error:
  31 #else
  32 syscall_error:
  33 #endif
  34 #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
  35         /* We translate the system's EWOULDBLOCK error into EAGAIN.
  36            The GNU C library always defines EWOULDBLOCK==EAGAIN.
  37            EWOULDBLOCK_sys is the original number.  */
  38         cmp EWOULDBLOCK_sys,d0  /* Is it the old EWOULDBLOCK?  */
  39         bne .Lnotb              /* Branch if not.  */
  40         mov EAGAIN,d0           /* Yes; translate it to EAGAIN.  */
  41 .Lnotb:
  42 #endif
  43 #ifndef PIC
  44 # ifndef _LIBC_REENTRANT
  45         mov d0,(C_SYMBOL_NAME (errno))
  46 # else
  47         movm [d2],(sp)
  48         add -12,sp
  49         mov d0,d2
  50         call __errno_location,[],0
  51         mov d2,(a0)
  52         add 12,sp
  53         movm (sp),[d2]
  54 # endif
  55 #else
  56 # error "This shouldn't be assembled for PIC"
  57 #endif
  58         mov -1,d0
  59         mov d0,a0
  60         ret
  61
  62 #undef  __syscall_error
  63 END (__syscall_error)