All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
@ 2017-02-07  7:34 ` He Kuang
  0 siblings, 0 replies; 11+ messages in thread
From: He Kuang @ 2017-02-07  7:34 UTC (permalink / raw)
  To: linux-arm-kernel

Since HAVE_KPROBES can be enabled in arm64, this patch introduces
regs_query_register_offset() to convert register name to offset for
arm64, so the BPF prologue feature is ready to use.

Signed-off-by: He Kuang <hekuang@huawei.com>
---
 tools/perf/arch/arm64/Makefile          |  1 +
 tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
index 18b1351..eebe1ec 100644
--- a/tools/perf/arch/arm64/Makefile
+++ b/tools/perf/arch/arm64/Makefile
@@ -2,3 +2,4 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
 PERF_HAVE_JITDUMP := 1
+PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c
index d49efeb..068b618 100644
--- a/tools/perf/arch/arm64/util/dwarf-regs.c
+++ b/tools/perf/arch/arm64/util/dwarf-regs.c
@@ -10,17 +10,20 @@
 
 #include <stddef.h>
 #include <dwarf-regs.h>
+#include <linux/ptrace.h> /* for struct user_pt_regs */
+#include "util.h"
 
 struct pt_regs_dwarfnum {
 	const char *name;
 	unsigned int dwarfnum;
 };
 
-#define STR(s) #s
 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
 #define GPR_DWARFNUM_NAME(num) \
 	{.name = STR(%x##num), .dwarfnum = num}
 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
+#define DWARFNUM2OFFSET(index) \
+	(index * sizeof((struct user_pt_regs *)0)->regs[0])
 
 /*
  * Reference:
@@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
 			return roff->name;
 	return NULL;
 }
+
+int regs_query_register_offset(const char *name)
+{
+	const struct pt_regs_dwarfnum *roff;
+
+	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
+		if (!strcmp(roff->name, name))
+			return DWARFNUM2OFFSET(roff->dwarfnum);
+	return -EINVAL;
+}
-- 
1.8.5.2

^ permalink raw reply related	[flat|nested] 11+ messages in thread
* [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
@ 2017-02-07  7:34 ` He Kuang
  0 siblings, 0 replies; 11+ messages in thread
From: He Kuang @ 2017-02-07  7:34 UTC (permalink / raw)
  To: peterz, will.deacon, mingo, acme, alexander.shishkin, mhiramat,
	jolsa, hekuang
  Cc: wangnan0, bintian.wang, linux-kernel, linux-arm-kernel

Since HAVE_KPROBES can be enabled in arm64, this patch introduces
regs_query_register_offset() to convert register name to offset for
arm64, so the BPF prologue feature is ready to use.

Signed-off-by: He Kuang <hekuang@huawei.com>
---
 tools/perf/arch/arm64/Makefile          |  1 +
 tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
index 18b1351..eebe1ec 100644
--- a/tools/perf/arch/arm64/Makefile
+++ b/tools/perf/arch/arm64/Makefile
@@ -2,3 +2,4 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
 PERF_HAVE_JITDUMP := 1
+PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c
index d49efeb..068b618 100644
--- a/tools/perf/arch/arm64/util/dwarf-regs.c
+++ b/tools/perf/arch/arm64/util/dwarf-regs.c
@@ -10,17 +10,20 @@
 
 #include <stddef.h>
 #include <dwarf-regs.h>
+#include <linux/ptrace.h> /* for struct user_pt_regs */
+#include "util.h"
 
 struct pt_regs_dwarfnum {
 	const char *name;
 	unsigned int dwarfnum;
 };
 
-#define STR(s) #s
 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
 #define GPR_DWARFNUM_NAME(num) \
 	{.name = STR(%x##num), .dwarfnum = num}
 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
+#define DWARFNUM2OFFSET(index) \
+	(index * sizeof((struct user_pt_regs *)0)->regs[0])
 
 /*
  * Reference:
@@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
 			return roff->name;
 	return NULL;
 }
+
+int regs_query_register_offset(const char *name)
+{
+	const struct pt_regs_dwarfnum *roff;
+
+	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
+		if (!strcmp(roff->name, name))
+			return DWARFNUM2OFFSET(roff->dwarfnum);
+	return -EINVAL;
+}
-- 
1.8.5.2

^ permalink raw reply related	[flat|nested] 11+ messages in thread
* [PATCH v4 2/2] perf tools: Add missing newline in debug messages
  2017-02-07  7:34 ` He Kuang
@ 2017-02-07  7:34   ` He Kuang
  -1 siblings, 0 replies; 11+ messages in thread
From: He Kuang @ 2017-02-07  7:34 UTC (permalink / raw)
  To: linux-arm-kernel

These two debug messages are missing the trailing newline.

Signed-off-by: He Kuang <hekuang@huawei.com>
---
 tools/perf/util/bpf-loader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 36c8611..bc6bc70 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -670,13 +670,13 @@ int bpf__probe(struct bpf_object *obj)
 
 		err = convert_perf_probe_events(pev, 1);
 		if (err < 0) {
-			pr_debug("bpf_probe: failed to convert perf probe events");
+			pr_debug("bpf_probe: failed to convert perf probe events\n");
 			goto out;
 		}
 
 		err = apply_perf_probe_events(pev, 1);
 		if (err < 0) {
-			pr_debug("bpf_probe: failed to apply perf probe events");
+			pr_debug("bpf_probe: failed to apply perf probe events\n");
 			goto out;
 		}
 
-- 
1.8.5.2

^ permalink raw reply related	[flat|nested] 11+ messages in thread
* [PATCH v4 2/2] perf tools: Add missing newline in debug messages
@ 2017-02-07  7:34   ` He Kuang
  0 siblings, 0 replies; 11+ messages in thread
From: He Kuang @ 2017-02-07  7:34 UTC (permalink / raw)
  To: peterz, will.deacon, mingo, acme, alexander.shishkin, mhiramat,
	jolsa, hekuang
  Cc: wangnan0, bintian.wang, linux-kernel, linux-arm-kernel

These two debug messages are missing the trailing newline.

Signed-off-by: He Kuang <hekuang@huawei.com>
---
 tools/perf/util/bpf-loader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 36c8611..bc6bc70 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -670,13 +670,13 @@ int bpf__probe(struct bpf_object *obj)
 
 		err = convert_perf_probe_events(pev, 1);
 		if (err < 0) {
-			pr_debug("bpf_probe: failed to convert perf probe events");
+			pr_debug("bpf_probe: failed to convert perf probe events\n");
 			goto out;
 		}
 
 		err = apply_perf_probe_events(pev, 1);
 		if (err < 0) {
-			pr_debug("bpf_probe: failed to apply perf probe events");
+			pr_debug("bpf_probe: failed to apply perf probe events\n");
 			goto out;
 		}
 
-- 
1.8.5.2

^ permalink raw reply related	[flat|nested] 11+ messages in thread
* [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
  2017-02-07  7:34 ` He Kuang
@ 2017-02-07 12:12   ` Will Deacon
  -1 siblings, 0 replies; 11+ messages in thread
From: Will Deacon @ 2017-02-07 12:12 UTC (permalink / raw)
  To: linux-arm-kernel

On Tue, Feb 07, 2017 at 07:34:11AM +0000, He Kuang wrote:
> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
> 
> Signed-off-by: He Kuang <hekuang@huawei.com>
> ---
>  tools/perf/arch/arm64/Makefile          |  1 +
>  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
>  2 files changed, 15 insertions(+), 1 deletion(-)

Thanks, looks ok to me now:

Reviewed-by: Will Deacon <will.deacon@arm.com>

Will

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
@ 2017-02-07 12:12   ` Will Deacon
  0 siblings, 0 replies; 11+ messages in thread
From: Will Deacon @ 2017-02-07 12:12 UTC (permalink / raw)
  To: He Kuang
  Cc: peterz, mingo, acme, alexander.shishkin, mhiramat, jolsa,
	wangnan0, bintian.wang, linux-kernel, linux-arm-kernel

On Tue, Feb 07, 2017 at 07:34:11AM +0000, He Kuang wrote:
> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
> 
> Signed-off-by: He Kuang <hekuang@huawei.com>
> ---
>  tools/perf/arch/arm64/Makefile          |  1 +
>  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
>  2 files changed, 15 insertions(+), 1 deletion(-)

Thanks, looks ok to me now:

Reviewed-by: Will Deacon <will.deacon@arm.com>

Will

^ permalink raw reply	[flat|nested] 11+ messages in thread
* [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
  2017-02-07  7:34 ` He Kuang
@ 2017-02-07 13:43   ` Masami Hiramatsu
  -1 siblings, 0 replies; 11+ messages in thread
From: Masami Hiramatsu @ 2017-02-07 13:43 UTC (permalink / raw)
  To: linux-arm-kernel

On Tue, 7 Feb 2017 07:34:11 +0000
He Kuang <hekuang@huawei.com> wrote:

> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
> 

Ok, looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thanks!

> Signed-off-by: He Kuang <hekuang@huawei.com>
> ---
>  tools/perf/arch/arm64/Makefile          |  1 +
>  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
> index 18b1351..eebe1ec 100644
> --- a/tools/perf/arch/arm64/Makefile
> +++ b/tools/perf/arch/arm64/Makefile
> @@ -2,3 +2,4 @@ ifndef NO_DWARF
>  PERF_HAVE_DWARF_REGS := 1
>  endif
>  PERF_HAVE_JITDUMP := 1
> +PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
> diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c
> index d49efeb..068b618 100644
> --- a/tools/perf/arch/arm64/util/dwarf-regs.c
> +++ b/tools/perf/arch/arm64/util/dwarf-regs.c
> @@ -10,17 +10,20 @@
>  
>  #include <stddef.h>
>  #include <dwarf-regs.h>
> +#include <linux/ptrace.h> /* for struct user_pt_regs */
> +#include "util.h"
>  
>  struct pt_regs_dwarfnum {
>  	const char *name;
>  	unsigned int dwarfnum;
>  };
>  
> -#define STR(s) #s
>  #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
>  #define GPR_DWARFNUM_NAME(num) \
>  	{.name = STR(%x##num), .dwarfnum = num}
>  #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
> +#define DWARFNUM2OFFSET(index) \
> +	(index * sizeof((struct user_pt_regs *)0)->regs[0])
>  
>  /*
>   * Reference:
> @@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
>  			return roff->name;
>  	return NULL;
>  }
> +
> +int regs_query_register_offset(const char *name)
> +{
> +	const struct pt_regs_dwarfnum *roff;
> +
> +	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
> +		if (!strcmp(roff->name, name))
> +			return DWARFNUM2OFFSET(roff->dwarfnum);
> +	return -EINVAL;
> +}
> -- 
> 1.8.5.2
> 


-- 
Masami Hiramatsu <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
@ 2017-02-07 13:43   ` Masami Hiramatsu
  0 siblings, 0 replies; 11+ messages in thread
From: Masami Hiramatsu @ 2017-02-07 13:43 UTC (permalink / raw)
  To: He Kuang
  Cc: peterz, will.deacon, mingo, acme, alexander.shishkin, jolsa,
	wangnan0, bintian.wang, linux-kernel, linux-arm-kernel

On Tue, 7 Feb 2017 07:34:11 +0000
He Kuang <hekuang@huawei.com> wrote:

> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
> 

Ok, looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thanks!

> Signed-off-by: He Kuang <hekuang@huawei.com>
> ---
>  tools/perf/arch/arm64/Makefile          |  1 +
>  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
> index 18b1351..eebe1ec 100644
> --- a/tools/perf/arch/arm64/Makefile
> +++ b/tools/perf/arch/arm64/Makefile
> @@ -2,3 +2,4 @@ ifndef NO_DWARF
>  PERF_HAVE_DWARF_REGS := 1
>  endif
>  PERF_HAVE_JITDUMP := 1
> +PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
> diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c
> index d49efeb..068b618 100644
> --- a/tools/perf/arch/arm64/util/dwarf-regs.c
> +++ b/tools/perf/arch/arm64/util/dwarf-regs.c
> @@ -10,17 +10,20 @@
>  
>  #include <stddef.h>
>  #include <dwarf-regs.h>
> +#include <linux/ptrace.h> /* for struct user_pt_regs */
> +#include "util.h"
>  
>  struct pt_regs_dwarfnum {
>  	const char *name;
>  	unsigned int dwarfnum;
>  };
>  
> -#define STR(s) #s
>  #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
>  #define GPR_DWARFNUM_NAME(num) \
>  	{.name = STR(%x##num), .dwarfnum = num}
>  #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
> +#define DWARFNUM2OFFSET(index) \
> +	(index * sizeof((struct user_pt_regs *)0)->regs[0])
>  
>  /*
>   * Reference:
> @@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
>  			return roff->name;
>  	return NULL;
>  }
> +
> +int regs_query_register_offset(const char *name)
> +{
> +	const struct pt_regs_dwarfnum *roff;
> +
> +	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
> +		if (!strcmp(roff->name, name))
> +			return DWARFNUM2OFFSET(roff->dwarfnum);
> +	return -EINVAL;
> +}
> -- 
> 1.8.5.2
> 


-- 
Masami Hiramatsu <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 11+ messages in thread
* [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
  2017-02-07 12:12   ` Will Deacon
@ 2017-02-07 15:02     ` Arnaldo Carvalho de Melo
  -1 siblings, 0 replies; 11+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-02-07 15:02 UTC (permalink / raw)
  To: linux-arm-kernel

Em Tue, Feb 07, 2017 at 12:12:33PM +0000, Will Deacon escreveu:
> On Tue, Feb 07, 2017 at 07:34:11AM +0000, He Kuang wrote:
> > Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> > regs_query_register_offset() to convert register name to offset for
> > arm64, so the BPF prologue feature is ready to use.
> > 
> > Signed-off-by: He Kuang <hekuang@huawei.com>
> > ---
> >  tools/perf/arch/arm64/Makefile          |  1 +
> >  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
> >  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> Thanks, looks ok to me now:
> 
> Reviewed-by: Will Deacon <will.deacon@arm.com>

Thanks, applied with your and Masami's tags.

- Arnaldo

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue
@ 2017-02-07 15:02     ` Arnaldo Carvalho de Melo
  0 siblings, 0 replies; 11+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-02-07 15:02 UTC (permalink / raw)
  To: Will Deacon
  Cc: He Kuang, peterz, mingo, alexander.shishkin, mhiramat, jolsa,
	wangnan0, bintian.wang, linux-kernel, linux-arm-kernel

Em Tue, Feb 07, 2017 at 12:12:33PM +0000, Will Deacon escreveu:
> On Tue, Feb 07, 2017 at 07:34:11AM +0000, He Kuang wrote:
> > Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> > regs_query_register_offset() to convert register name to offset for
> > arm64, so the BPF prologue feature is ready to use.
> > 
> > Signed-off-by: He Kuang <hekuang@huawei.com>
> > ---
> >  tools/perf/arch/arm64/Makefile          |  1 +
> >  tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
> >  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> Thanks, looks ok to me now:
> 
> Reviewed-by: Will Deacon <will.deacon@arm.com>

Thanks, applied with your and Masami's tags.

- Arnaldo

^ permalink raw reply	[flat|nested] 11+ messages in thread
* [tip:perf/core] perf tools arm64: Add support for generating bpf prologue
  2017-02-07  7:34 ` He Kuang
                   ` (3 preceding siblings ...)
  (?)
@ 2017-02-10  7:40 ` tip-bot for He Kuang
  -1 siblings, 0 replies; 11+ messages in thread
From: tip-bot for He Kuang @ 2017-02-10  7:40 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: hekuang, linux-kernel, acme, hpa, peterz, tglx, mhiramat,
	wangnan0, will.deacon, bintian.wang, alexander.shishkin, jolsa,
	mingo

Commit-ID:  3bb53c9f124bd9297f18d58a395cff59dfaf8541
Gitweb:     http://git.kernel.org/tip/3bb53c9f124bd9297f18d58a395cff59dfaf8541
Author:     He Kuang <hekuang@huawei.com>
AuthorDate: Tue, 7 Feb 2017 07:34:11 +0000
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 8 Feb 2017 08:55:01 -0300

perf tools arm64: Add support for generating bpf prologue

Since HAVE_KPROBES can be enabled in arm64, this patch introduces
regs_query_register_offset() to convert register name to offset for
arm64, so the BPF prologue feature is ready to use.

Signed-off-by: He Kuang <hekuang@huawei.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bintian Wang <bintian.wang@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20170207073412.26983-1-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/arch/arm64/Makefile          |  1 +
 tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
index 18b1351..eebe1ec 100644
--- a/tools/perf/arch/arm64/Makefile
+++ b/tools/perf/arch/arm64/Makefile
@@ -2,3 +2,4 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
 PERF_HAVE_JITDUMP := 1
+PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c
index d49efeb..068b618 100644
--- a/tools/perf/arch/arm64/util/dwarf-regs.c
+++ b/tools/perf/arch/arm64/util/dwarf-regs.c
@@ -10,17 +10,20 @@
 
 #include <stddef.h>
 #include <dwarf-regs.h>
+#include <linux/ptrace.h> /* for struct user_pt_regs */
+#include "util.h"
 
 struct pt_regs_dwarfnum {
 	const char *name;
 	unsigned int dwarfnum;
 };
 
-#define STR(s) #s
 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
 #define GPR_DWARFNUM_NAME(num) \
 	{.name = STR(%x##num), .dwarfnum = num}
 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
+#define DWARFNUM2OFFSET(index) \
+	(index * sizeof((struct user_pt_regs *)0)->regs[0])
 
 /*
  * Reference:
@@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
 			return roff->name;
 	return NULL;
 }
+
+int regs_query_register_offset(const char *name)
+{
+	const struct pt_regs_dwarfnum *roff;
+
+	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
+		if (!strcmp(roff->name, name))
+			return DWARFNUM2OFFSET(roff->dwarfnum);
+	return -EINVAL;
+}

^ permalink raw reply related	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2017-02-10  7:45 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-02-07  7:34 [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue He Kuang
2017-02-07  7:34 ` He Kuang
2017-02-07  7:34 ` [PATCH v4 2/2] perf tools: Add missing newline in debug messages He Kuang
2017-02-07  7:34   ` He Kuang
2017-02-07 12:12 ` [PATCH v4 1/2] perf tools arm64: Add support for generating bpf prologue Will Deacon
2017-02-07 12:12   ` Will Deacon
2017-02-07 15:02   ` Arnaldo Carvalho de Melo
2017-02-07 15:02     ` Arnaldo Carvalho de Melo
2017-02-07 13:43 ` Masami Hiramatsu
2017-02-07 13:43   ` Masami Hiramatsu
2017-02-10  7:40 ` [tip:perf/core] " tip-bot for He Kuang

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.