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Diffstat (limited to 'arch/sparc/kernel/perf_event.c')
-rw-r--r--arch/sparc/kernel/perf_event.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 885a8af74064..b5c38faa4ead 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1762,15 +1762,25 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
ufp = regs->u_regs[UREG_I6] & 0xffffffffUL;
do {
- struct sparc_stackf32 *usf, sf;
unsigned long pc;
- usf = (struct sparc_stackf32 *) ufp;
- if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
- break;
+ if (thread32_stack_is_64bit(ufp)) {
+ struct sparc_stackf *usf, sf;
- pc = sf.callers_pc;
- ufp = (unsigned long)sf.fp;
+ ufp += STACK_BIAS;
+ usf = (struct sparc_stackf *) ufp;
+ if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
+ break;
+ pc = sf.callers_pc & 0xffffffff;
+ ufp = ((unsigned long) sf.fp) & 0xffffffff;
+ } else {
+ struct sparc_stackf32 *usf, sf;
+ usf = (struct sparc_stackf32 *) ufp;
+ if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
+ break;
+ pc = sf.callers_pc;
+ ufp = (unsigned long)sf.fp;
+ }
perf_callchain_store(entry, pc);
} while (entry->nr < PERF_MAX_STACK_DEPTH);
}