glibc/sysdeps/unix/sysv/linux/m68k/sysdep.S
Andreas Schwab 0301a08c93 * sysdeps/unix/sysv/linux/m68k/sysdep.S: Make _errno a weak alias,
not a strong alias.
1998-06-30  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/sysdep.S: Make _errno a weak alias,
	not a strong alias.

 	scratch, which is faster and gets correct behaviour if $(subdirs)
 	is incomplete.
1998-07-01 01:42:09 +00:00

64 lines
2.0 KiB
ArmAsm

/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
/* Because the Linux version is in fact m68k/ELF and the start.? file
for this system (sysdeps/m68k/elf/start.S) is also used by The Hurd
and therefore this files must not contain the definition of the
`errno' variable (I don't know why, ask Roland), we have to define
it somewhere else.
...and this place is here. */
.bss
.globl errno
.type errno,@object
errno: .space 4
.size errno,4
weak_alias (errno, _errno)
.text
/* The following code is only used in the shared library when we
compile the reentrant version. Otherwise each system call defines
each own version. */
#ifndef PIC
/* The syscall stubs jump here when they detect an error. */
#undef CALL_MCOUNT
#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %d0. */
.text
ENTRY (__syscall_error)
neg.l %d0
#ifndef _LIBC_REENTRANT
move.l %d0, errno
#else
move.l %d0, -(%sp)
jbsr __errno_location
move.l (%sp)+, (%a0)
#endif
move.l #-1, %d0
/* Copy return value to %a0 for syscalls that are declared to
return a pointer. */
move.l %d0, %a0
rts
END (__syscall_error)
#endif /* PIC */