| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * arch/alpha/lib/dbg_stackkill.S |
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| 4 | * Contributed by Richard Henderson (rth@cygnus.com) |
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| 5 | * |
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| 6 | * Clobber the balance of the kernel stack, hoping to catch |
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| 7 | * uninitialized local variables in the act. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <asm/asm-offsets.h> |
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| 11 | |
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| 12 | .text |
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| 13 | .set noat |
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| 14 | |
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| 15 | .align 5 |
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| 16 | .globl _mcount |
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| 17 | .ent _mcount |
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| 18 | _mcount: |
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| 19 | .frame $30, 0, $28, 0 |
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| 20 | .prologue 0 |
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| 21 | |
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| 22 | ldi $0, 0xdeadbeef |
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| 23 | lda $2, -STACK_SIZE |
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| 24 | sll $0, 32, $1 |
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| 25 | and $30, $2, $2 |
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| 26 | or $0, $1, $0 |
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| 27 | lda $2, TASK_SIZE($2) |
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| 28 | cmpult $2, $30, $1 |
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| 29 | beq $1, 2f |
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| 30 | 1: stq $0, 0($2) |
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| 31 | addq $2, 8, $2 |
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| 32 | cmpult $2, $30, $1 |
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| 33 | bne $1, 1b |
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| 34 | 2: ret ($28) |
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| 35 | |
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| 36 | .end _mcount |
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| 37 | |
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