1 #!/usr/local/bin/python
3 # Copyright 2004 John-Mark Gurney
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
9 # 1. Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
11 # 2. Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in the
13 # documentation and/or other materials provided with the distribution.
15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 gdb_cmd = 'kgdb %(p)s/kernel.debug %(core)s | tee /tmp/gdb.log'
36 filenamere = re.compile(r'filename\s+=\s+0x[0-9a-f]+\s("(?P<fn>[^"]+)"|(?P<error><[^>]*>))', re.M)
37 addressre = re.compile(r'address\s+=\s+(?P<ad>0x[0-9a-f]+)', re.M)
38 nextre = re.compile(r'tqe_next\s+=\s+(?P<ad>0x[0-9a-f]+)', re.M)
39 printre = re.compile(r'\$\d+\s+=\s+')
41 #Paths to search for ko's/debugs
44 if len(sys.argv[1:]) < 2:
45 print 'Usage: prog <kerncomp> <core> [<paths>]'
48 #Get the base modules path
49 pfs = sys.argv[1].split('/')
53 i = i + pfs[i:].index('sys') + 1
58 sys.stderr.write("No sys dir in kernel source path: %s\n" % sys.argv[1])
61 kld_debug_paths.append('/'.join(pfs[:i] + ['modules']))
62 kld_debug_paths.append(sys.argv[1])
63 #kld_debug_paths.append(sys.argv[3:])
64 gdb_cmd = gdb_cmd % {'p': sys.argv[1], 'core': sys.argv[2] }
67 gdb = popen2.popen4(gdb_cmd)
69 def searchfor(inp, re, j = 0, l = None):
70 """searchfor(inp, re, j, l): Searches for regex re in inp. It will
71 automaticly add more lines. If j is set, the lines will be joined together.
72 l can provide a starting line to help search against. Return value is a
73 tupple of the last line, and the match if any."""
87 def get_addresses(inp, out):
88 """get_addresses(inp, out): It will search for addresses from gdb.
89 inp and out, are the gdb input and output respectively. Return value is
90 a list of tupples. The tupples contain the filename and the address the
91 filename was loaded."""
96 out.write("print linker_files.tqh_first[0]\n")
98 out.write("print *(struct linker_file *)%d\n" % nxad)
100 l = searchfor(inp, printre)[0]
101 l, fn = searchfor(inp, filenamere, 1, l)
102 if not fn.group('fn'):
103 sys.stderr.write("got error: %s\n" % fn.group('error'))
106 l, ad = searchfor(inp, addressre, 1, l)
107 l, nx = searchfor(inp, nextre, 1, l)
108 addr.append((fn.group('fn'), long(ad.group('ad'), 16)))
109 nxad = long(nx.group('ad'), 16)
114 addr = get_addresses(gdb[0], gdb[1])
116 #Pass through the resulting addresses, skipping the kernel.
118 for j in kld_debug_paths:
120 p = popen2.popen4('find %s -type f -name "%s.debug"' % (j, i[0]))[0].read().strip()
123 #Try just .ko if .debug wasn't found.
124 p = popen2.popen4('find %s -type f -name "%s"' % (j, i[0]))[0].read().strip()
129 #Tell our user that we couldn't find it.
131 sys.stderr.write("Can't find module: %s (addr: %d + header)\n" % (i[0], a))
132 print '#add-symbol-file <file>', a, '#add header'
135 #j = popen2.popen4('objdump --section-headers /boot/kernel/%s | grep "\.text"' % i[0])[0].read().strip().split()
136 #Output the necessary information
137 j = popen2.popen4('objdump --section-headers "%s" | grep "\.text"' % p)[0].read().strip().split()
140 print 'add-symbol-file', p, i[1] + a
142 sys.stderr.write('Bad file: %s, address: %d\n' % (i[0], i[1]))