kgdb-jmp.s

一个2.4.21版本的嵌入式linux内核

/*
 * FILE NAME: arch/arm/kernel/kgdb-jmp.S
 *
 * MODULE DESCRIPTION:
 * Trivial setjmp and longjmp procedures to support bus error recovery
 * which may occur during kgdb memory read/write operations.
 *
 * Author: MontaVista Software, Inc.
 *         [e-mail]
 *
 * Copyright 2002 MontaVista Software Inc.
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/linkage.h>

ENTRY (kgdb_setjmp)
	/* Save registers */
	stmia	r0, {r0-r14}
	str	lr,[r0, #60]
	mrs	r1,cpsr
	str	r1,[r0,#64]
	ldr	r1,[r0,#4]
	mov	r0, #0
	mov	pc,lr

ENTRY (kgdb_longjmp)
	/* Restore registers */
	str	r1,[r0]
	ldmia	r0,{r0-pc}^