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-rw-r--r--tools/perf/util/dwarf-regs.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 69cfaa5953..5b7f86c006 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -5,9 +5,12 @@
* Written by: Masami Hiramatsu <mhiramat@kernel.org>
*/
+#include <stdlib.h>
+#include <string.h>
#include <debug.h>
#include <dwarf-regs.h>
#include <elf.h>
+#include <errno.h>
#include <linux/kernel.h>
#ifndef EM_AARCH64
@@ -68,3 +71,34 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
}
return NULL;
}
+
+__weak int get_arch_regnum(const char *name __maybe_unused)
+{
+ return -ENOTSUP;
+}
+
+/* Return DWARF register number from architecture register name */
+int get_dwarf_regnum(const char *name, unsigned int machine)
+{
+ char *regname = strdup(name);
+ int reg = -1;
+ char *p;
+
+ if (regname == NULL)
+ return -EINVAL;
+
+ /* For convenience, remove trailing characters */
+ p = strpbrk(regname, " ,)");
+ if (p)
+ *p = '\0';
+
+ switch (machine) {
+ case EM_NONE: /* Generic arch - use host arch */
+ reg = get_arch_regnum(regname);
+ break;
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", machine);
+ }
+ free(regname);
+ return reg;
+}