1#!/usr/bin/env python
2# add symbolic names to read_msr / write_msr in trace
3# decode_msr msr-index.h < trace
4import sys
5import re
6
7msrs = dict()
8
9with open(sys.argv[1] if len(sys.argv) > 1 else "msr-index.h", "r") as f:
10	for j in f:
11		m = re.match(r'#define (MSR_\w+)\s+(0x[0-9a-fA-F]+)', j)
12		if m:
13			msrs[int(m.group(2), 16)] = m.group(1)
14
15extra_ranges = (
16	( "MSR_LASTBRANCH_%d_FROM_IP", 0x680, 0x69F ),
17	( "MSR_LASTBRANCH_%d_TO_IP", 0x6C0, 0x6DF ),
18	( "LBR_INFO_%d", 0xdc0, 0xddf ),
19)
20
21for j in sys.stdin:
22	m = re.search(r'(read|write)_msr:\s+([0-9a-f]+)', j)
23	if m:
24		r = None
25		num = int(m.group(2), 16)
26		if num in msrs:
27			r = msrs[num]
28		else:
29			for er in extra_ranges:
30				if er[1] <= num <= er[2]:
31					r = er[0] % (num - er[1],)
32					break
33		if r:
34			j = j.replace(" " + m.group(2), " " + r + "(" + m.group(2) + ")")
35	print j,
36
37
38