You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.2 KiB
58 lines
1.2 KiB
20 years ago
|
/*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* Kernel debug stuff to use the Watch registers.
|
||
|
|
* Useful to find stack overflows, dangling pointers etc.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1995, 1996, 1999, 2001 by Ralf Baechle
|
||
|
|
*/
|
||
|
|
#include <asm/asm.h>
|
||
|
|
#include <asm/mipsregs.h>
|
||
|
|
#include <asm/regdef.h>
|
||
|
|
|
||
|
|
.set noreorder
|
||
|
|
/*
|
||
|
|
* Parameter: a0 - physical address to watch
|
||
|
|
* a1 - set bit #1 to trap on load references
|
||
|
|
* bit #0 to trap on store references
|
||
|
|
* Results : none
|
||
|
|
*/
|
||
|
|
LEAF(__watch_set)
|
||
|
|
ori a0, 7
|
||
|
|
xori a0, 7
|
||
|
|
or a0, a1
|
||
|
|
mtc0 a0, CP0_WATCHLO
|
||
|
|
sd a0, watch_savelo
|
||
|
|
dsrl32 a0, a0, 0
|
||
|
|
|
||
|
|
jr ra
|
||
|
|
mtc0 zero, CP0_WATCHHI
|
||
|
|
END(__watch_set)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Parameter: none
|
||
|
|
* Results : none
|
||
|
|
*/
|
||
|
|
LEAF(__watch_clear)
|
||
|
|
jr ra
|
||
|
|
mtc0 zero, CP0_WATCHLO
|
||
|
|
END(__watch_clear)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Parameter: none
|
||
|
|
* Results : none
|
||
|
|
*/
|
||
|
|
LEAF(__watch_reenable)
|
||
|
|
ld t0, watch_savelo
|
||
|
|
jr ra
|
||
|
|
mtc0 t0, CP0_WATCHLO
|
||
|
|
END(__watch_reenable)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Saved value of the c0_watchlo register for watch_reenable()
|
||
|
|
*/
|
||
|
|
.local watch_savelo
|
||
|
|
.comm watch_savelo, 8, 8
|