2 files changed, 92 insertions, 0 deletions

diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile
new file mode 100644
index 00000000000..15130b50dfe
--- /dev/null
+++ b/tools/perf/arch/powerpc/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/powerpc/util/dwarf-regs.c b/tools/perf/arch/powerpc/util/dwarf-regs.c
new file mode 100644
index 00000000000..48ae0c5e3f7
--- /dev/null
+++ b/tools/perf/arch/powerpc/util/dwarf-regs.c
@@ -0,0 +1,88 @@
+/*
+ * Mapping of DWARF debug register numbers into register names.
+ *
+ * Copyright (C) 2010 Ian Munsie, IBM Corporation.
+ *
+ * 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>
+
+
+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(%gpr##num), .dwarfnum = num}
+#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
+
+/*
+ * Reference:
+ * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html
+ */
+static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
+        GPR_DWARFNUM_NAME(0),
+        GPR_DWARFNUM_NAME(1),
+        GPR_DWARFNUM_NAME(2),
+        GPR_DWARFNUM_NAME(3),
+        GPR_DWARFNUM_NAME(4),
+        GPR_DWARFNUM_NAME(5),
+        GPR_DWARFNUM_NAME(6),
+        GPR_DWARFNUM_NAME(7),
+        GPR_DWARFNUM_NAME(8),
+        GPR_DWARFNUM_NAME(9),
+        GPR_DWARFNUM_NAME(10),
+        GPR_DWARFNUM_NAME(11),
+        GPR_DWARFNUM_NAME(12),
+        GPR_DWARFNUM_NAME(13),
+        GPR_DWARFNUM_NAME(14),
+        GPR_DWARFNUM_NAME(15),
+        GPR_DWARFNUM_NAME(16),
+        GPR_DWARFNUM_NAME(17),
+        GPR_DWARFNUM_NAME(18),
+        GPR_DWARFNUM_NAME(19),
+        GPR_DWARFNUM_NAME(20),
+        GPR_DWARFNUM_NAME(21),
+        GPR_DWARFNUM_NAME(22),
+        GPR_DWARFNUM_NAME(23),
+        GPR_DWARFNUM_NAME(24),
+        GPR_DWARFNUM_NAME(25),
+        GPR_DWARFNUM_NAME(26),
+        GPR_DWARFNUM_NAME(27),
+        GPR_DWARFNUM_NAME(28),
+        GPR_DWARFNUM_NAME(29),
+        GPR_DWARFNUM_NAME(30),
+        GPR_DWARFNUM_NAME(31),
+        REG_DWARFNUM_NAME("%msr",   66),
+        REG_DWARFNUM_NAME("%ctr",   109),
+        REG_DWARFNUM_NAME("%link",  108),
+        REG_DWARFNUM_NAME("%xer",   101),
+        REG_DWARFNUM_NAME("%dar",   119),
+        REG_DWARFNUM_NAME("%dsisr", 118),
+        REG_DWARFNUM_END,
+};
+
+/**
+ * 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)
+{
+        const struct pt_regs_dwarfnum *roff;
+        for (roff = regdwarfnum_table; roff->name != NULL; roff++)
+                if (roff->dwarfnum == n)
+                        return roff->name;
+        return NULL;
+}