1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
#!/usr/bin/python
# Copyright (C) 2008 Red Hat Inc.
#
# This file is part of systemtap, and is free software. You can
# redistribute it and/or modify it under the terms of the GNU General
# Public License (GPL); either version 2, or (at your option) any
# later version.
import re
import sys
import os
#import pickle
import subprocess
from config_opts import config_opts
# Read the output of eu-readelf on vmlinux
(sysname, nodename, release, version, machine) = os.uname()
cmd = "eu-readelf --symbols /usr/lib/debug/lib/modules/%s/vmlinux" % release
print "Running", cmd
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
lines = p.stdout.readlines()
p.wait()
if p.returncode != 0:
print >>sys.stderr, "Error: eu-readelf failed."
sys.exit(p.returncode)
# Parse the output
kprobes_text_start = 0
kprobes_text_end = 0
syms = dict()
func_re = re.compile("^\s*\d+:\s+([0-9a-f]+)\s+\d+\s+FUNC\s+\S+\s+\S+\s+\d+\s+(\S+)$")
notype_re = re.compile("^\s*\d+:\s+([0-9a-f]+)\s+\d+\s+NOTYPE\s+\S+\s+\S+\s+\d+\s+(\S+)$")
for line in lines:
match = notype_re.match(line)
if match:
addr = match.group(1)
name = match.group(2)
if name == "__kprobes_text_start":
kprobes_text_start = long(addr, 16)
elif name == "__kprobes_text_end":
kprobes_text_end = long(addr, 16)
continue
match = func_re.match(line)
if match:
addr = match.group(1)
name = match.group(2)
syms[name] = long(addr, 16)
# Now we've parsed everything. Now we need to go back and remove all
# symbols between '__kprobes_text_start' and '__kprobes_text_end',
# since they are already protected from kprobes. We couldn't do this
# in the loop above, since we might encounter symbols that need to be
# removed before we found the start/end of the kprobes section.
if kprobes_text_start == 0 or kprobes_text_end == 0:
print "Error - didn't find kprobes_test_start(%d) or kprobes_text_end(%d)" \
% (kprobes_text_start, kprobes_text_end)
sys.exit(1)
for name in syms.keys():
if syms[name] >= kprobes_text_start and syms[name] < kprobes_text_end:
print "deleting", name
del syms[name]
## Save data
#f = open('%s.syms' % (release), 'w')
#p = pickle.Pickler(f)
#p.dump(syms)
#f.close()
# Write the data out in text format
f = open(config_opts['probes_all'], 'w')
for name in syms.keys():
print >>f, name
f.close()
|
