#!/usr/local/bin/python
#
# Copyright 2004 John-Mark Gurney
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
import sys
import os
import popen2
import re
gdb_cmd = 'kgdb %(p)s/kernel.debug %(core)s | tee /tmp/gdb.log'
#GDB regex
filenamere = re.compile(r'filename\s+=\s+0x[0-9a-f]+\s("(?P<fn>[^"]+)"|(?P<error><[^>]*>))', re.M)
addressre = re.compile(r'address\s+=\s+(?P<ad>0x[0-9a-f]+)', re.M)
nextre = re.compile(r'tqe_next\s+=\s+(?P<ad>0x[0-9a-f]+)', re.M)
printre = re.compile(r'\$\d+\s+=\s+')
#Paths to search for ko's/debugs
kld_debug_paths = []
if len(sys.argv[1:]) < 2:
print 'Usage: prog <kerncomp> <core> [<paths>]'
sys.exit(1)
#Get the base modules path
pfs = sys.argv[1].split('/')
try:
i = 0
while 1:
i = i + pfs[i:].index('sys') + 1
except:
pass
if i == -1:
sys.stderr.write("No sys dir in kernel source path: %s\n" % sys.argv[1])
sys.exit(0)
kld_debug_paths.append('/'.join(pfs[:i] + ['modules']))
kld_debug_paths.append(sys.argv[1])
#kld_debug_paths.append(sys.argv[3:])
gdb_cmd = gdb_cmd % {'p': sys.argv[1], 'core': sys.argv[2] }
#Start gdb
gdb = popen2.popen4(gdb_cmd)
def searchfor(inp, re, j = 0, l = None):
"""searchfor(inp, re, j, l): Searches for regex re in inp. It will
automaticly add more lines. If j is set, the lines will be joined together.
l can provide a starting line to help search against. Return value is a
tupple of the last line, and the match if any."""
ret = None
if not l:
l = inp.readline()
ret = re.search(l)
while l and not ret:
if j:
l += inp.readline()
else:
l = inp.readline()
ret = re.search(l)
return (l, ret)
def get_addresses(inp, out):
"""get_addresses(inp, out): It will search for addresses from gdb.
inp and out, are the gdb input and output respectively. Return value is
a list of tupples. The tupples contain the filename and the address the
filename was loaded."""
addr = []
nxad = 1
while nxad:
if nxad == 1:
out.write("print linker_files.tqh_first[0]\n")
else:
out.write("print *(struct linker_file *)%d\n" % nxad)
out.flush()
l = searchfor(inp, printre)[0]
l, fn = searchfor(inp, filenamere, 1, l)
if not fn.group('fn'):
sys.stderr.write("got error: %s\n" % fn.group('error'))
nxad = 0
else:
l, ad = searchfor(inp, addressre, 1, l)
l, nx = searchfor(inp, nextre, 1, l)
addr.append((fn.group('fn'), long(ad.group('ad'), 16)))
nxad = long(nx.group('ad'), 16)
return addr
#Get the addresses
addr = get_addresses(gdb[0], gdb[1])
#Pass through the resulting addresses, skipping the kernel.
for i in addr[1:]:
for j in kld_debug_paths:
#Try .debug first.
p = popen2.popen4('find %s -type f -name "%s.debug"' % (j, i[0]))[0].read().strip()
if p:
break
#Try just .ko if .debug wasn't found.
p = popen2.popen4('find %s -type f -name "%s"' % (j, i[0]))[0].read().strip()
if p:
break
if not p:
#Tell our user that we couldn't find it.
a = i[1]
sys.stderr.write("Can't find module: %s (addr: %d + header)\n" % (i[0], a))
print '#add-symbol-file <file>', a, '#add header'
continue
#j = popen2.popen4('objdump --section-headers /boot/kernel/%s | grep "\.text"' % i[0])[0].read().strip().split()
#Output the necessary information
j = popen2.popen4('objdump --section-headers "%s" | grep "\.text"' % p)[0].read().strip().split()
try:
a = int(j[5], 16)
print 'add-symbol-file', p, i[1] + a
except IndexError:
sys.stderr.write('Bad file: %s, address: %d\n' % (i[0], i[1]))
