__longjmp.s

它通过提供glibc兼容使得应用程序移植到较小的c 库时相当得容易. 它能够应用到带虚拟存储的Linux和uClinux上.在大多数带MMU部件的平台上为使它更加紧凑,它也能够编译成共享库.uClib

/* longjmp for CRIS.
   Copyright (C) 2001 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>
#define _SETJMP_H
#define _ASM
#include <bits/setjmp.h>

/* Saving and restoring CCR is meaningless, so we don't do it.  */
ENTRY (__longjmp)
	/* Note that r10 = jmp_buf, r11 = retval.  */
	move [$r10+16*4],$srp
	test.d $r11
	beq 0f                  /* Already a 1 in place. */
	nop
	/* Offset for r9, the return value (see setjmp).  */
	move.d $r11,[$r10+6*4]
0:
	movem [$r10],$pc
END (__longjmp)

	.weak longjmp
	longjmp = __longjmp