perf unwind: Change macro names of perf register

Use macro name prefixed with "LIBUNWIND_ARCH" for better understanding
that the regs used by callbacks of libunwind are arch specific. The real
regs used should be defined in the wrapper file of
"unwind-libunwind-local.c" for each supported arch.

Signed-off-by: He Kuang <[e-mail]>
Acked-by: Jiri Olsa <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Ekaterina Tumanova <[e-mail]>
Cc: Josh Poimboeuf <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Masami Hiramatsu <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Pekka Enberg <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Cc: Sukadev Bhattiprolu <[e-mail]>
Cc: Wang Nan <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/unwind-libunwind-local.c

···
 		return 0;
 	}
 
-	ret = perf_reg_value(&start, &ui->sample->user_regs, PERF_REG_SP);
+	ret = perf_reg_value(&start, &ui->sample->user_regs,
+			     LIBUNWIND__ARCH_REG_SP);
 	if (ret)
 		return ret;
 
···
 	unw_cursor_t c;
 	int ret, i = 0;
 
-	ret = perf_reg_value(&val, &ui->sample->user_regs, PERF_REG_IP);
+	ret = perf_reg_value(&val, &ui->sample->user_regs,
+			     LIBUNWIND__ARCH_REG_IP);
 	if (ret)
 		return ret;
 

tools/perf/util/unwind.h

···
 #ifndef LIBUNWIND__ARCH_REG_ID
 #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
 #endif
+
+#ifndef LIBUNWIND__ARCH_REG_SP
+#define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
+#endif
+
+#ifndef LIBUNWIND__ARCH_REG_IP
+#define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
+#endif
+
 int LIBUNWIND__ARCH_REG_ID(int regnum);
 int unwind__prepare_access(struct thread *thread, struct map *map);
 void unwind__flush_access(struct thread *thread);