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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
9 #include <asm/asm_offsets.h>
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