* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-10 15:10 [PATCH] perf: Add DWARF register lookup for SH Matt Fleming
@ 2010-07-12 1:54 ` Masami Hiramatsu
2010-07-12 6:23 ` Matt Fleming
2010-07-12 8:57 ` Masami Hiramatsu
2010-07-16 4:21 ` [tip:perf/core] perf tools: " tip-bot for Matt Fleming
2 siblings, 1 reply; 9+ messages in thread
From: Masami Hiramatsu @ 2010-07-12 1:54 UTC (permalink / raw)
To: Matt Fleming
Cc: linux-kernel, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
Arnaldo Carvalho de Melo, Ian Munsie, Masami Hiramatsu
Matt Fleming wrote:
> Implement get_arch_regstr() for SH so that, given a DWARF register
> number, the corresponding symbolic name of that register can be looked
> up.
OK, the patch itself looks good, but I don't know whether SH kernel
supports KPROBE_EVENT which is required for perf-probe. Or, SH kernel
repository already has it?
Thank you,
>
> Signed-off-by: Matt Fleming <matt@console-pimps.org>
> ---
> tools/perf/arch/sh/Makefile | 4 ++
> tools/perf/arch/sh/util/dwarf-regs.c | 55 ++++++++++++++++++++++++++++++++++
> 2 files changed, 59 insertions(+), 0 deletions(-)
> create mode 100644 tools/perf/arch/sh/Makefile
> create mode 100644 tools/perf/arch/sh/util/dwarf-regs.c
>
> diff --git a/tools/perf/arch/sh/Makefile b/tools/perf/arch/sh/Makefile
> new file mode 100644
> index 0000000..15130b5
> --- /dev/null
> +++ b/tools/perf/arch/sh/Makefile
> @@ -0,0 +1,4 @@
> +ifndef NO_DWARF
> +PERF_HAVE_DWARF_REGS := 1
> +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
> +endif
> diff --git a/tools/perf/arch/sh/util/dwarf-regs.c b/tools/perf/arch/sh/util/dwarf-regs.c
> new file mode 100644
> index 0000000..a11edb0
> --- /dev/null
> +++ b/tools/perf/arch/sh/util/dwarf-regs.c
> @@ -0,0 +1,55 @@
> +/*
> + * Mapping of DWARF debug register numbers into register names.
> + *
> + * Copyright (C) 2010 Matt Fleming <matt@console-pimps.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> + *
> + */
> +
> +#include <libio.h>
> +#include <dwarf-regs.h>
> +
> +/*
> + * Generic dwarf analysis helpers
> + */
> +
> +#define SH_MAX_REGS 18
> +const char *sh_regs_table[SH_MAX_REGS] = {
> + "r0",
> + "r1",
> + "r2",
> + "r3",
> + "r4",
> + "r5",
> + "r6",
> + "r7",
> + "r8",
> + "r9",
> + "r10",
> + "r11",
> + "r12",
> + "r13",
> + "r14",
> + "r15",
> + "pc",
> + "pr",
> +};
> +
> +/* Return architecture dependent register string (for kprobe-tracer) */
> +const char *get_arch_regstr(unsigned int n)
> +{
> + return (n <= SH_MAX_REGS) ? sh_regs_table[n] : NULL;
> +}
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-12 1:54 ` Masami Hiramatsu
@ 2010-07-12 6:23 ` Matt Fleming
2010-07-12 6:41 ` Paul Mundt
0 siblings, 1 reply; 9+ messages in thread
From: Matt Fleming @ 2010-07-12 6:23 UTC (permalink / raw)
To: Masami Hiramatsu
Cc: linux-kernel, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
Arnaldo Carvalho de Melo, Ian Munsie, Masami Hiramatsu,
Paul Mundt
On Mon, 12 Jul 2010 10:54:43 +0900, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
> Matt Fleming wrote:
> > Implement get_arch_regstr() for SH so that, given a DWARF register
> > number, the corresponding symbolic name of that register can be looked
> > up.
>
> OK, the patch itself looks good, but I don't know whether SH kernel
> supports KPROBE_EVENT which is required for perf-probe. Or, SH kernel
> repository already has it?
No, SH doesn't support KPROBE_EVENT yet. It's on my list of things to
do. However, this patch also stops the "DWARF register mappings have not
been defined" warning when building perf.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-12 6:23 ` Matt Fleming
@ 2010-07-12 6:41 ` Paul Mundt
2010-07-12 8:14 ` Matt Fleming
2010-07-12 8:55 ` Masami Hiramatsu
0 siblings, 2 replies; 9+ messages in thread
From: Paul Mundt @ 2010-07-12 6:41 UTC (permalink / raw)
To: Matt Fleming
Cc: Masami Hiramatsu, linux-kernel, Peter Zijlstra, Paul Mackerras,
Ingo Molnar, Arnaldo Carvalho de Melo, Ian Munsie,
Masami Hiramatsu
On Mon, Jul 12, 2010 at 07:23:44AM +0100, Matt Fleming wrote:
> On Mon, 12 Jul 2010 10:54:43 +0900, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
> > Matt Fleming wrote:
> > > Implement get_arch_regstr() for SH so that, given a DWARF register
> > > number, the corresponding symbolic name of that register can be looked
> > > up.
> >
> > OK, the patch itself looks good, but I don't know whether SH kernel
> > supports KPROBE_EVENT which is required for perf-probe. Or, SH kernel
> > repository already has it?
>
> No, SH doesn't support KPROBE_EVENT yet. It's on my list of things to
> do. However, this patch also stops the "DWARF register mappings have not
> been defined" warning when building perf.
It does now, by virtue of HAVE_REGS_AND_STACK_ACCESS_API. The initial
support for this was checked in on June 14th, so you should be able to
use it already as long as you're working with current HEAD.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-12 6:41 ` Paul Mundt
@ 2010-07-12 8:14 ` Matt Fleming
2010-07-12 8:55 ` Masami Hiramatsu
1 sibling, 0 replies; 9+ messages in thread
From: Matt Fleming @ 2010-07-12 8:14 UTC (permalink / raw)
To: Paul Mundt
Cc: Masami Hiramatsu, linux-kernel, Peter Zijlstra, Paul Mackerras,
Ingo Molnar, Arnaldo Carvalho de Melo, Ian Munsie,
Masami Hiramatsu
On Mon, Jul 12, 2010 at 03:41:26PM +0900, Paul Mundt wrote:
> On Mon, Jul 12, 2010 at 07:23:44AM +0100, Matt Fleming wrote:
> >
> > No, SH doesn't support KPROBE_EVENT yet. It's on my list of things to
> > do. However, this patch also stops the "DWARF register mappings have not
> > been defined" warning when building perf.
>
> It does now, by virtue of HAVE_REGS_AND_STACK_ACCESS_API. The initial
> support for this was checked in on June 14th, so you should be able to
> use it already as long as you're working with current HEAD.
Oh, whoops, I must have been thinking of something else. Thanks Paul!
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-12 6:41 ` Paul Mundt
2010-07-12 8:14 ` Matt Fleming
@ 2010-07-12 8:55 ` Masami Hiramatsu
1 sibling, 0 replies; 9+ messages in thread
From: Masami Hiramatsu @ 2010-07-12 8:55 UTC (permalink / raw)
To: Paul Mundt
Cc: Matt Fleming, linux-kernel, Peter Zijlstra, Paul Mackerras,
Ingo Molnar, Arnaldo Carvalho de Melo, Ian Munsie,
Masami Hiramatsu
Paul Mundt wrote:
> On Mon, Jul 12, 2010 at 07:23:44AM +0100, Matt Fleming wrote:
>> On Mon, 12 Jul 2010 10:54:43 +0900, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
>>> Matt Fleming wrote:
>>>> Implement get_arch_regstr() for SH so that, given a DWARF register
>>>> number, the corresponding symbolic name of that register can be looked
>>>> up.
>>> OK, the patch itself looks good, but I don't know whether SH kernel
>>> supports KPROBE_EVENT which is required for perf-probe. Or, SH kernel
>>> repository already has it?
>> No, SH doesn't support KPROBE_EVENT yet. It's on my list of things to
>> do. However, this patch also stops the "DWARF register mappings have not
>> been defined" warning when building perf.
>
> It does now, by virtue of HAVE_REGS_AND_STACK_ACCESS_API. The initial
> support for this was checked in on June 14th, so you should be able to
> use it already as long as you're working with current HEAD.
Wow, that's great! :)
Thanks!
--
Masami HIRAMATSU
2nd Research Dept.
Hitachi, Ltd., Systems Development Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-10 15:10 [PATCH] perf: Add DWARF register lookup for SH Matt Fleming
2010-07-12 1:54 ` Masami Hiramatsu
@ 2010-07-12 8:57 ` Masami Hiramatsu
2010-07-12 17:14 ` Arnaldo Carvalho de Melo
2010-07-16 4:21 ` [tip:perf/core] perf tools: " tip-bot for Matt Fleming
2 siblings, 1 reply; 9+ messages in thread
From: Masami Hiramatsu @ 2010-07-12 8:57 UTC (permalink / raw)
To: Matt Fleming
Cc: linux-kernel, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
Arnaldo Carvalho de Melo, Ian Munsie, Masami Hiramatsu
Matt Fleming wrote:
> Implement get_arch_regstr() for SH so that, given a DWARF register
> number, the corresponding symbolic name of that register can be looked
> up.
KPROBE_EVENT has already been supported on the latest linux-sh,
so this should be work on that.
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Thanks!
>
> Signed-off-by: Matt Fleming <matt@console-pimps.org>
> ---
> tools/perf/arch/sh/Makefile | 4 ++
> tools/perf/arch/sh/util/dwarf-regs.c | 55 ++++++++++++++++++++++++++++++++++
> 2 files changed, 59 insertions(+), 0 deletions(-)
> create mode 100644 tools/perf/arch/sh/Makefile
> create mode 100644 tools/perf/arch/sh/util/dwarf-regs.c
>
> diff --git a/tools/perf/arch/sh/Makefile b/tools/perf/arch/sh/Makefile
> new file mode 100644
> index 0000000..15130b5
> --- /dev/null
> +++ b/tools/perf/arch/sh/Makefile
> @@ -0,0 +1,4 @@
> +ifndef NO_DWARF
> +PERF_HAVE_DWARF_REGS := 1
> +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
> +endif
> diff --git a/tools/perf/arch/sh/util/dwarf-regs.c b/tools/perf/arch/sh/util/dwarf-regs.c
> new file mode 100644
> index 0000000..a11edb0
> --- /dev/null
> +++ b/tools/perf/arch/sh/util/dwarf-regs.c
> @@ -0,0 +1,55 @@
> +/*
> + * Mapping of DWARF debug register numbers into register names.
> + *
> + * Copyright (C) 2010 Matt Fleming <matt@console-pimps.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> + *
> + */
> +
> +#include <libio.h>
> +#include <dwarf-regs.h>
> +
> +/*
> + * Generic dwarf analysis helpers
> + */
> +
> +#define SH_MAX_REGS 18
> +const char *sh_regs_table[SH_MAX_REGS] = {
> + "r0",
> + "r1",
> + "r2",
> + "r3",
> + "r4",
> + "r5",
> + "r6",
> + "r7",
> + "r8",
> + "r9",
> + "r10",
> + "r11",
> + "r12",
> + "r13",
> + "r14",
> + "r15",
> + "pc",
> + "pr",
> +};
> +
> +/* Return architecture dependent register string (for kprobe-tracer) */
> +const char *get_arch_regstr(unsigned int n)
> +{
> + return (n <= SH_MAX_REGS) ? sh_regs_table[n] : NULL;
> +}
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] perf: Add DWARF register lookup for SH
2010-07-12 8:57 ` Masami Hiramatsu
@ 2010-07-12 17:14 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 9+ messages in thread
From: Arnaldo Carvalho de Melo @ 2010-07-12 17:14 UTC (permalink / raw)
To: Masami Hiramatsu
Cc: Matt Fleming, linux-kernel, Peter Zijlstra, Paul Mackerras,
Ingo Molnar, Ian Munsie, Masami Hiramatsu
Em Mon, Jul 12, 2010 at 05:57:29PM +0900, Masami Hiramatsu escreveu:
> Matt Fleming wrote:
> > Implement get_arch_regstr() for SH so that, given a DWARF register
> > number, the corresponding symbolic name of that register can be looked
> > up.
>
> KPROBE_EVENT has already been supported on the latest linux-sh,
> so this should be work on that.
>
> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Thanks, applying it then,
- Arnaldo
^ permalink raw reply [flat|nested] 9+ messages in thread
* [tip:perf/core] perf tools: Add DWARF register lookup for SH
2010-07-10 15:10 [PATCH] perf: Add DWARF register lookup for SH Matt Fleming
2010-07-12 1:54 ` Masami Hiramatsu
2010-07-12 8:57 ` Masami Hiramatsu
@ 2010-07-16 4:21 ` tip-bot for Matt Fleming
2 siblings, 0 replies; 9+ messages in thread
From: tip-bot for Matt Fleming @ 2010-07-16 4:21 UTC (permalink / raw)
To: linux-tip-commits
Cc: acme, linux-kernel, paulus, hpa, mingo, a.p.zijlstra,
masami.hiramatsu.pt, matt, imunsie, tglx, mingo
Commit-ID: 0dd9ac63ce26ec87b080ca9c3e6efed33c23ace6
Gitweb: http://git.kernel.org/tip/0dd9ac63ce26ec87b080ca9c3e6efed33c23ace6
Author: Matt Fleming <matt@console-pimps.org>
AuthorDate: Sat, 10 Jul 2010 16:10:39 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 12 Jul 2010 11:25:10 -0300
perf tools: Add DWARF register lookup for SH
Implement get_arch_regstr() for SH so that, given a DWARF register number, the
corresponding symbolic name of that register can be looked up.
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ian Munsie <imunsie@au.ibm.com>
LKML-Reference: <e55812819ad18c2ceca5651ac7698a2af46180d7.1278774279.git.matt@console-pimps.org>
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/{powerpc => sh}/Makefile | 0
.../perf/arch/sh/util/dwarf-regs.c | 48 +++++++++++++-------
2 files changed, 32 insertions(+), 16 deletions(-)
diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/sh/Makefile
similarity index 100%
copy from tools/perf/arch/powerpc/Makefile
copy to tools/perf/arch/sh/Makefile
diff --git a/kernel/rcutiny_plugin.h b/tools/perf/arch/sh/util/dwarf-regs.c
similarity index 55%
copy from kernel/rcutiny_plugin.h
copy to tools/perf/arch/sh/util/dwarf-regs.c
index d223a92..a11edb0 100644
--- a/kernel/rcutiny_plugin.h
+++ b/tools/perf/arch/sh/util/dwarf-regs.c
@@ -1,7 +1,7 @@
/*
- * Read-Copy Update mechanism for mutual exclusion (tree-based version)
- * Internal non-public definitions that provide either classic
- * or preemptable semantics.
+ * Mapping of DWARF debug register numbers into register names.
+ *
+ * Copyright (C) 2010 Matt Fleming <matt@console-pimps.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -17,23 +17,39 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Copyright IBM Corporation, 2009
- *
- * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
*/
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-
-#include <linux/kernel_stat.h>
+#include <libio.h>
+#include <dwarf-regs.h>
/*
- * During boot, we forgive RCU lockdep issues. After this function is
- * invoked, we start taking RCU lockdep issues seriously.
+ * Generic dwarf analysis helpers
*/
-void rcu_scheduler_starting(void)
+
+#define SH_MAX_REGS 18
+const char *sh_regs_table[SH_MAX_REGS] = {
+ "r0",
+ "r1",
+ "r2",
+ "r3",
+ "r4",
+ "r5",
+ "r6",
+ "r7",
+ "r8",
+ "r9",
+ "r10",
+ "r11",
+ "r12",
+ "r13",
+ "r14",
+ "r15",
+ "pc",
+ "pr",
+};
+
+/* Return architecture dependent register string (for kprobe-tracer) */
+const char *get_arch_regstr(unsigned int n)
{
- WARN_ON(nr_context_switches() > 0);
- rcu_scheduler_active = 1;
+ return (n <= SH_MAX_REGS) ? sh_regs_table[n] : NULL;
}
-
-#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
^ permalink raw reply [flat|nested] 9+ messages in thread