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perf map: Consider PTI entry trampolines in rip_2objdump() 

perf tools uses map__rip_2objdump() to calculate objdump virtual addresses.
map__rip_2objdump() needs to be amended to deal with PTI entry trampolines.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1528183800-21577-1-git-send-email-adrian.hunter@intel.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2018-06-05 10:30:00 +03:00 committed by Arnaldo Carvalho de Melo
parent f6c66d73bb
commit 97802f3b81
1 changed files with 14 additions and 0 deletions
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14
tools/perf/util/map.c
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@ -449,6 +449,20 @@ int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
*/
u64 map__rip_2objdump(struct map *map, u64 rip)
{
struct kmap *kmap = __map__kmap(map);
/*
* vmlinux does not have program headers for PTI entry trampolines and
* kcore may not either. However the trampoline object code is on the
* main kernel map, so just use that instead.
*/
if (kmap && is_entry_trampoline(kmap->name) && kmap->kmaps && kmap->kmaps->machine) {
struct map *kernel_map = machine__kernel_map(kmap->kmaps->machine);
if (kernel_map)
map = kernel_map;
}
if (!map->dso->adjust_symbols)
return rip;