On powerpc ABIv2, if no debug-info is found and we use kallsyms,
we need to fixup the function entry to point to the local entry point.
Use offset of 8 since current toolchains always generate 2
instructions (8 bytes).
Signed-off-by: Naveen N. Rao <naveen.n....@linux.vnet.ibm.com>
---
tools/perf/util/probe-event.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index adcdbd2..0970e2a 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -2318,6 +2318,15 @@ static int find_probe_trace_events_from_map(struct
perf_probe_event *pev,
}
/* Add one probe point */
tp->address = map->unmap_ip(map, sym->start) + pp->offset;
+#if defined(__powerpc64__) && defined(_CALL_ELF) && _CALL_ELF == 2
+ /*
+ * If we used kallsyms, we should fixup the function entry
address here.
+ * ppc64le ABIv2 local entry point is currently always 2
instructions (8 bytes)
+ * after the global entry point. Fix this if it ever changes.
+ */
+ if (!pev->uprobes && map->dso->symtab_type ==
DSO_BINARY_TYPE__KALLSYMS)
+ tp->address += 8;
+#endif
if (reloc_sym) {
tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
tp->offset = tp->address - reloc_sym->addr;
--
2.1.3
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
