perf record: Add a fallback to the reference relocation symbol

Usually "_text" is enough, but I received reports that its not always
available, so fallback to "_stext" for the symbol we use to check if we
need to apply any relocation to all the symbols in the kernel symtab,
for when, for instance, kexec is being used.
Reported-by: default avatarDarren Hart <dvhltc@us.ibm.com>
Cc: Darren Hart <dvhltc@us.ibm.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c29ede61
...@@ -575,6 +575,9 @@ static int __cmd_record(int argc, const char **argv) ...@@ -575,6 +575,9 @@ static int __cmd_record(int argc, const char **argv)
err = event__synthesize_kernel_mmap(process_synthesized_event, err = event__synthesize_kernel_mmap(process_synthesized_event,
session, "_text"); session, "_text");
if (err < 0)
err = event__synthesize_kernel_mmap(process_synthesized_event,
session, "_stext");
if (err < 0) { if (err < 0) {
pr_err("Couldn't record kernel reference relocation symbol.\n"); pr_err("Couldn't record kernel reference relocation symbol.\n");
return err; return err;
......
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