[deliverable/linux.git] / arch / alpha / lib / dbg_stackkill.S

/*
 * arch/alpha/lib/killstack.S
 * Contributed by Richard Henderson (rth@cygnus.com)
 *
 * Clobber the balance of the kernel stack, hoping to catch
 * uninitialized local variables in the act.
 */

#include <asm/asm-offsets.h>

	.text
	.set noat

	.align 5
	.globl _mcount
	.ent _mcount
_mcount:
	.frame $30, 0, $28, 0
	.prologue 0

	ldi	$0, 0xdeadbeef
	lda	$2, -STACK_SIZE
	sll	$0, 32, $1
	and	$30, $2, $2
	or	$0, $1, $0
	lda	$2, TASK_SIZE($2)
	cmpult	$2, $30, $1
	beq	$1, 2f
1:	stq	$0, 0($2)
	addq	$2, 8, $2
	cmpult	$2, $30, $1
	bne	$1, 1b
2:	ret	($28)

	.end _mcount
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/alpha/lib/killstack.S
	3	* Contributed by Richard Henderson (rth@cygnus.com)
	4	*
	5	* Clobber the balance of the kernel stack, hoping to catch
	6	* uninitialized local variables in the act.
	7	*/
	8
e2d5df93	9	#include <asm/asm-offsets.h>
1da177e4 LT	10
	11	.text
	12	.set noat
	13
	14	.align 5
	15	.globl _mcount
	16	.ent _mcount
	17	_mcount:
	18	.frame $30, 0, $28, 0
	19	.prologue 0
	20
	21	ldi $0, 0xdeadbeef
	22	lda $2, -STACK_SIZE
	23	sll $0, 32, $1
	24	and $30, $2, $2
	25	or $0, $1, $0
	26	lda $2, TASK_SIZE($2)
	27	cmpult $2, $30, $1
	28	beq $1, 2f
	29	1: stq $0, 0($2)
	30	addq $2, 8, $2
	31	cmpult $2, $30, $1
	32	bne $1, 1b
	33	2: ret ($28)
	34
	35	.end _mcount