1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * arch/alpha/lib/dbg_stackcheck.S 3 * arch/alpha/lib/dbg_stackcheck.S
4 * Contributed by Richard Henderson (rth@tamu. 4 * Contributed by Richard Henderson (rth@tamu.edu)
5 * 5 *
6 * Verify that we have not overflowed the stac 6 * Verify that we have not overflowed the stack. Oops if we have.
7 */ 7 */
8 8
9 #include <asm/asm-offsets.h> 9 #include <asm/asm-offsets.h>
10 10
11 .text 11 .text
12 .set noat 12 .set noat
13 13
14 .align 3 14 .align 3
15 .globl _mcount 15 .globl _mcount
16 .ent _mcount 16 .ent _mcount
17 _mcount: 17 _mcount:
18 .frame $30, 0, $28, 0 18 .frame $30, 0, $28, 0
19 .prologue 0 19 .prologue 0
20 20
21 lda $0, TASK_SIZE($8) 21 lda $0, TASK_SIZE($8)
22 cmpult $30, $0, $0 22 cmpult $30, $0, $0
23 bne $0, 1f 23 bne $0, 1f
24 ret ($28) 24 ret ($28)
25 1: stq $31, -8($31) # oops me, dam 25 1: stq $31, -8($31) # oops me, damn it.
26 br 1b 26 br 1b
27 27
28 .end _mcount 28 .end _mcount
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