--- zzzz-none-000/linux-3.10.107/tools/perf/util/include/dwarf-regs.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/tools/perf/util/include/dwarf-regs.h	2021-02-04 17:41:59.000000000 +0000
@@ -1,8 +1,16 @@
 #ifndef _PERF_DWARF_REGS_H_
 #define _PERF_DWARF_REGS_H_
 
-#ifdef DWARF_SUPPORT
+#ifdef HAVE_DWARF_SUPPORT
 const char *get_arch_regstr(unsigned int n);
 #endif
 
+#ifdef HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
+/*
+ * Arch should support fetching the offset of a register in pt_regs
+ * by its name. See kernel's regs_query_register_offset in
+ * arch/xxx/kernel/ptrace.c.
+ */
+int regs_query_register_offset(const char *name);
+#endif
 #endif