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Diffstat (limited to 'arch/alpha/lib/dbg_stackcheck.S')
-rw-r--r--arch/alpha/lib/dbg_stackcheck.S27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/alpha/lib/dbg_stackcheck.S b/arch/alpha/lib/dbg_stackcheck.S
new file mode 100644
index 000000000000..cc5ce3a5fcad
--- /dev/null
+++ b/arch/alpha/lib/dbg_stackcheck.S
@@ -0,0 +1,27 @@
1/*
2 * arch/alpha/lib/stackcheck.S
3 * Contributed by Richard Henderson (rth@tamu.edu)
4 *
5 * Verify that we have not overflowed the stack. Oops if we have.
6 */
7
8#include <asm/asm_offsets.h>
9
10 .text
11 .set noat
12
13 .align 3
14 .globl _mcount
15 .ent _mcount
16_mcount:
17 .frame $30, 0, $28, 0
18 .prologue 0
19
20 lda $0, TASK_SIZE($8)
21 cmpult $30, $0, $0
22 bne $0, 1f
23 ret ($28)
241: stq $31, -8($31) # oops me, damn it.
25 br 1b
26
27 .end _mcount