1 #!/usr/bin/env python
2 # add symbolic names to read_msr / write_msr in trace
3 # decode_msr msr-index.h < trace
4 import sys
5 import re
6
7 msrs = dict()
8
9 with 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
15 extra_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
21 for 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
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