| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * arch/alpha/lib/dbg_stackkill.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 |
