linux-kernel - [tip:perf/core] perf probe: Fix wrong register name for arm64

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Message-ID: <tip-1b29dfbba124be5077a24996a272205baec1c008@git.kernel.org>
Date:   Thu, 26 Jan 2017 07:28:06 -0800
From:   tip-bot for He Kuang <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mhiramat@...nel.org, acme@...hat.com,
        alexander.shishkin@...ux.intel.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, wangnan0@...wei.com,
        jolsa@...hat.com, bintian.wang@...wei.com, tglx@...utronix.de,
        will.deacon@....com, hekuang@...wei.com, mingo@...nel.org,
        hpa@...or.com
Subject: [tip:perf/core] perf probe: Fix wrong register name for arm64

Commit-ID:  1b29dfbba124be5077a24996a272205baec1c008
Gitweb:     http://git.kernel.org/tip/1b29dfbba124be5077a24996a272205baec1c008
Author:     He Kuang <hekuang@...wei.com>
AuthorDate: Tue, 24 Jan 2017 10:30:14 +0000
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 26 Jan 2017 11:42:43 -0300

perf probe: Fix wrong register name for arm64

The register name of arm64 architecture is x0-x31 not r0-r31, this patch
changes this typo.

Before this patch:

  # perf probe --definition 'sys_write count'
  p:probe/sys_write _text+1502872 count=%r2:s64

  # echo 'p:probe/sys_write _text+1502872 count=%r2:s64' > \
    /sys/kernel/debug/tracing/kprobe_events
  Parse error at argument[0]. (-22)

After this patch:

  # perf probe --definition 'sys_write count'
  p:probe/sys_write _text+1502872 count=%x2:s64

  # echo 'p:probe/sys_write _text+1502872 count=%x2:s64' > \
    /sys/kernel/debug/tracing/kprobe_events
  # echo 1 >/sys/kernel/debug/tracing/events/probe/enable
  # cat /sys/kernel/debug/tracing/trace
  ...
  sh-422   [000] d... 650.495930: sys_write: (SyS_write+0x0/0xc8) count=22
  sh-422   [000] d... 651.102389: sys_write: (SyS_write+0x0/0xc8) count=26
  sh-422   [000] d... 651.358653: sys_write: (SyS_write+0x0/0xc8) count=86

Signed-off-by: He Kuang <hekuang@...wei.com>
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Acked-by: Will Deacon <will.deacon@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Bintian Wang <bintian.wang@...wei.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/20170124103015.1936-2-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/arch/arm64/include/dwarf-regs-table.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/perf/arch/arm64/include/dwarf-regs-table.h b/tools/perf/arch/arm64/include/dwarf-regs-table.h
index 2675936..36e375f 100644
--- a/tools/perf/arch/arm64/include/dwarf-regs-table.h
+++ b/tools/perf/arch/arm64/include/dwarf-regs-table.h
@@ -2,12 +2,12 @@
 /* This is included in perf/util/dwarf-regs.c */
 
 static const char * const aarch64_regstr_tbl[] = {
-	"%r0", "%r1", "%r2", "%r3", "%r4",
-	"%r5", "%r6", "%r7", "%r8", "%r9",
-	"%r10", "%r11", "%r12", "%r13", "%r14",
-	"%r15", "%r16", "%r17", "%r18", "%r19",
-	"%r20", "%r21", "%r22", "%r23", "%r24",
-	"%r25", "%r26", "%r27", "%r28", "%r29",
+	"%x0", "%x1", "%x2", "%x3", "%x4",
+	"%x5", "%x6", "%x7", "%x8", "%x9",
+	"%x10", "%x11", "%x12", "%x13", "%x14",
+	"%x15", "%x16", "%x17", "%x18", "%x19",
+	"%x20", "%x21", "%x22", "%x23", "%x24",
+	"%x25", "%x26", "%x27", "%x28", "%x29",
 	"%lr", "%sp",
 };
 #endif