[PATCH 01/22] perf probe: Fix dwarf regs table for x86_64

From: Arnaldo Carvalho de Melo
Date: Tue Sep 20 2016 - 16:04:58 EST

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

In 293d5b439483 ("perf probe: Support probing on offline cross-arch binary")
DWARF register tables were introduced for many architectures, with the one for
the "dx" register being broken for x86_64, which got noticed by the 'perf test
bpf' testcase, that has this difference from a successful run to one that
fails, with the aforementioned patch:

-Writing event: p:perf_bpf_probe/func _text+5197232 f_mode=+68(%di):x32 offset=%si:s64 orig=dx:s32
-Failed to write event: Invalid argument
-bpf_probe: failed to apply perf probe eventsFailed to add events selected by BPF
+Writing event: p:perf_bpf_probe/func _text+5197232 f_mode=+68(%di):x32 offset=%si:s64 orig=%dx:s32

Add the missing '%' to '%dx' to fix this.

Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Fixes: 293d5b439483 ("perf probe: Support probing on offline cross-arch binary")
Link: https://lkml.kernel.org/r/20160909145955.GC32585@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/perf/arch/x86/include/dwarf-regs-table.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/arch/x86/include/dwarf-regs-table.h b/tools/perf/arch/x86/include/dwarf-regs-table.h
index 39ac7cbb525b..9b5e5cbb4209 100644
--- a/tools/perf/arch/x86/include/dwarf-regs-table.h
+++ b/tools/perf/arch/x86/include/dwarf-regs-table.h
@@ -7,7 +7,7 @@ static const char * const x86_32_regstr_tbl[] = {

static const char * const x86_64_regstr_tbl[] = {
- "%ax", "dx", "%cx", "%bx", "%si", "%di",
+ "%ax", "%dx", "%cx", "%bx", "%si", "%di",
"%bp", "%sp", "%r8", "%r9", "%r10", "%r11",
"%r12", "%r13", "%r14", "%r15",