linux-kernel - [RFC PATCH 2/6] perf bpf: Add pt

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Date:	Tue, 5 May 2015 10:10:08 +0000
From:	He Kuang <hekuang@...wei.com>
To:	<ast@...mgrid.com>, <davem@...emloft.net>, <acme@...nel.org>,
	<mingo@...hat.com>, <a.p.zijlstra@...llo.nl>,
	<masami.hiramatsu.pt@...achi.com>, <jolsa@...nel.org>
CC:	<wangnan0@...wei.com>, <lizefan@...nel.org>,
	<linux-kernel@...r.kernel.org>, <pi3orama@....com>
Subject: [RFC PATCH 2/6] perf bpf: Add pt_regs convert table for x86

Convert register number in debuginfo to its index in pt_regs.

Signed-off-by: He Kuang <hekuang@...wei.com>
---
 tools/perf/arch/x86/util/dwarf-regs.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/tools/perf/arch/x86/util/dwarf-regs.c b/tools/perf/arch/x86/util/dwarf-regs.c
index be22dd4..e586a47 100644
--- a/tools/perf/arch/x86/util/dwarf-regs.c
+++ b/tools/perf/arch/x86/util/dwarf-regs.c
@@ -59,10 +59,31 @@ const char *x86_64_regs_table[X86_64_MAX_REGS] = {
 	"%r15",
 };
 
+const char x86_64_pt_regs_table[X86_64_MAX_REGS] = {
+	10,
+	12,
+	11,
+	5,
+	13,
+	14,
+	4,
+	19,
+	9,
+	8,
+	7,
+	6,
+	3,
+	2,
+	1,
+	0,
+};
+
 /* TODO: switching by dwarf address size */
 #ifdef __x86_64__
 #define ARCH_MAX_REGS X86_64_MAX_REGS
 #define arch_regs_table x86_64_regs_table
+#define arch_pt_regs_table x86_64_pt_regs_table
+#define arch_pt_regs_type unsigned long
 #else
 #define ARCH_MAX_REGS X86_32_MAX_REGS
 #define arch_regs_table x86_32_regs_table
@@ -73,3 +94,13 @@ const char *get_arch_regstr(unsigned int n)
 {
 	return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;
 }
+
+char get_arch_pt_regs(unsigned int n)
+{
+	return (n <= ARCH_MAX_REGS) ? arch_pt_regs_table[n] : -1;
+}
+
+int get_arch_pt_regs_size(void)
+{
+	return sizeof(arch_pt_regs_type);
+}
-- 
1.8.5.2

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