48 lines
1.6 KiB
ArmAsm
48 lines
1.6 KiB
ArmAsm
/* Copyright (C) 1991, 1993 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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <sysdep.h>
|
|
#ifdef __svr4__
|
|
#include <sys/trap.h>
|
|
#else
|
|
#include <machine/trap.h>
|
|
#endif
|
|
|
|
/* NOTE: This code depends on the definition of `__jmp_buf' in <jmp_buf.h>. */
|
|
|
|
ENTRY (__longjmp)
|
|
/* Do a "flush register windows trap". The trap handler in the
|
|
kernel writes all the register windows to their stack slots, and
|
|
marks them all as invalid (needing to be sucked up from the
|
|
stack when used). This ensures that all information needed to
|
|
unwind to these callers is in memory, not in the register
|
|
windows. */
|
|
ta ST_FLUSH_WINDOWS
|
|
ld [%o0], %o7 /* Return PC. */
|
|
ld [%o0 + 4], %fp /* Saved SP. */
|
|
sub %fp, 64, %sp /* Allocate a register save area. */
|
|
|
|
/* if (%o1 == 0) %o1 = 1; */
|
|
tst %o1
|
|
be,a Ldone
|
|
mov 1, %o1
|
|
|
|
Ldone: retl
|
|
/* On the way out, put the return value in %o0. */
|
|
restore %o1, 0, %o0
|