Em Tue, Dec 09, 2014 at 11:04:06PM +0530, Naveen N. Rao escreveu:
> 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).
Hi Michael and Ananth, may I have your Acked-by or Reviewed-by for these
patches?
The ones, like this, that are affects only ppc I'm can assume was tested
and applying it won't break other arch users, but having a/rev-by from
ppc developers should speed up this process.
Thanks,
- Arnaldo
> 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
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