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powerpc/tracing: TRACE_WITH_FRAME_BUFFER creates invalid stack frames 

TRACE_WITH_FRAME_BUFFER creates 32 byte stack frames. On ppc64
ABIv1 this is too small and a callee could corrupt the stack by
writing to the parameter save area (starting at offset 48).

Signed-off-by: Anton Blanchard <anton@samba.org>
This commit is contained in:
Anton Blanchard 2014-03-10 12:51:58 +11:00
parent 6403105bfd
commit d51959d70f
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/include/asm/irqflags.h
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@ -20,9 +20,9 @@
*/
#define TRACE_WITH_FRAME_BUFFER(func) \
mflr r0; \
stdu r1, -32(r1); \
stdu r1, -STACK_FRAME_OVERHEAD(r1); \
std r0, 16(r1); \
stdu r1, -32(r1); \
stdu r1, -STACK_FRAME_OVERHEAD(r1); \
bl func; \
ld r1, 0(r1); \
ld r1, 0(r1);