[PATCH 3/3] perf: add dwarf regs map for mips

[liguang]

Signed-off-by: liguang <lig.fnst@xxxxxxxxxxxxxx>
---
 tools/perf/arch/mips/Makefile          |    4 +++
 tools/perf/arch/mips/util/dwarf-regs.c |   33 ++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 0 deletions(-)
 create mode 100644 tools/perf/arch/mips/Makefile
 create mode 100644 tools/perf/arch/mips/util/dwarf-regs.c

diff --git a/tools/perf/arch/mips/Makefile b/tools/perf/arch/mips/Makefile
new file mode 100644
index 0000000..15130b5
--- /dev/null
+++ b/tools/perf/arch/mips/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/mips/util/dwarf-regs.c b/tools/perf/arch/mips/util/dwarf-regs.c
new file mode 100644
index 0000000..4871489
--- /dev/null
+++ b/tools/perf/arch/mips/util/dwarf-regs.c
@@ -0,0 +1,33 @@
+/*
+ * Mapping of DWARF debug register numbers into register names.
+ *
+ * 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.
+ */
+
+#include <libio.h>
+#include <dwarf-regs.h>
+
+#define MIPS_MAX_REGS	32
+
+const char *mips_regs_table[MIPS_MAX_REGS] = {
+	"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
+	"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
+	"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
+	"t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra",
+};
+
+/**
+ * get_arch_regstr() - lookup register name from it's DWARF register number
+ * @n:	the DWARF register number
+ *
+ * get_arch_regstr() returns the name of the register in struct
+ * regdwarfnum_table from it's DWARF register number. If the register is not
+ * found in the table, this returns NULL;
+ */
+const char *get_arch_regstr(unsigned int n)
+{
+	return (n <= MIPS_MAX_REGS) ? mips_regs_table[n] : NULL;
+}
-- 
1.7.2.5

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