5 # Copyright 2008, Intel Corporation
7 # This file is part of the Linux kernel
9 # This program file is free software; you can redistribute it and/or modify it
10 # under the terms of the GNU General Public License as published by the
11 # Free Software Foundation; version 2 of the License.
14 # Arjan van de Ven <arjan@linux.intel.com>
17 my $vmlinux_name = $ARGV[0];
18 if (!defined($vmlinux_name)) {
19 my $kerver = `uname -r`;
21 $vmlinux_name = "/lib/modules/$kerver/build/vmlinux";
22 print "No vmlinux specified, assuming $vmlinux_name\n";
24 my $filename = $vmlinux_name;
26 # Step 1: Parse the oops to find the EIP value
41 if ($line =~ /EAX: ([0-9a-f]+) EBX: ([0-9a-f]+) ECX: ([0-9a-f]+) EDX: ([0-9a-f]+)/) {
47 if ($line =~ /ESI: ([0-9a-f]+) EDI: ([0-9a-f]+) EBP: ([0-9a-f]+) ESP: ([0-9a-f]+)/) {
52 if ($line =~ /RAX: ([0-9a-f]+) RBX: ([0-9a-f]+) RCX: ([0-9a-f]+)/) {
57 if ($line =~ /RDX: ([0-9a-f]+) RSI: ([0-9a-f]+) RDI: ([0-9a-f]+)/) {
62 if ($line =~ /RBP: ([0-9a-f]+) R08: ([0-9a-f]+) R09: ([0-9a-f]+)/) {
66 if ($line =~ /R10: ([0-9a-f]+) R11: ([0-9a-f]+) R12: ([0-9a-f]+)/) {
71 if ($line =~ /R13: ([0-9a-f]+) R14: ([0-9a-f]+) R15: ([0-9a-f]+)/) {
81 $reg =~ s/r(.)x/e\1x/;
82 $reg =~ s/r(.)i/e\1i/;
83 $reg =~ s/r(.)p/e\1p/;
89 my ($line, $cntr) = @_;
91 if (length($line) < 40) {
92 return ""; # not an asm istruction
95 # find the arguments to the instruction
96 if ($line =~ /([0-9a-zA-Z\,\%\(\)\-\+]+)$/) {
102 # we need to find the registers that get clobbered,
103 # since their value is no longer relevant for previous
104 # instructions in the stream.
106 $clobber = $lastword;
107 # first, remove all memory operands, they're read only
108 $clobber =~ s/\([a-z0-9\%\,]+\)//g;
109 # then, remove everything before the comma, thats the read part
110 $clobber =~ s/.*\,//g;
112 # if this is the instruction that faulted, we haven't actually done
113 # the write yet... nothing is clobbered.
118 foreach $reg (keys(%regs)) {
119 my $clobberprime = reg_name($clobber);
120 my $lastwordprime = reg_name($lastword);
121 my $val = $regs{$reg};
122 if ($val =~ /^[0]+$/) {
128 # first check if we're clobbering this register; if we do
129 # we print it with a =>, and then delete its value
130 if ($clobber =~ /$reg/ || $clobberprime =~ /$reg/) {
131 if (length($val) > 0) {
132 $str = $str . " $reg => $val ";
137 # now check if we're reading this register
138 if ($lastword =~ /$reg/ || $lastwordprime =~ /$reg/) {
139 if (length($val) > 0) {
140 $str = $str . " $reg = $val ";
150 if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) {
153 if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) {
156 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
160 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
165 # check if it's a module
166 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
169 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
172 parse_x86_regs($line);
175 my $decodestart = hex($target) - hex($func_offset);
176 my $decodestop = hex($target) + 8192;
177 if ($target eq "0") {
178 print "No oops found!\n";
180 print " dmesg | perl scripts/markup_oops.pl vmlinux\n";
184 # if it's a module, we need to find the .ko file and calculate a load offset
186 my $dir = dirname($filename);
188 my $mod = $module . ".ko";
189 my $modulefile = `find $dir -name $mod | head -1`;
191 $filename = $modulefile;
192 if ($filename eq "") {
193 print "Module .ko file for $module not found. Aborting\n";
196 # ok so we found the module, now we need to calculate the vma offset
197 open(FILE, "objdump -dS $filename |") || die "Cannot start objdump";
199 if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) {
201 $vmaoffset = hex($target) - hex($fu) - hex($func_offset);
214 my ($address, $target) = @_;
215 my $ad = "0x".$address;
216 my $ta = "0x".$target;
217 my $delta = hex($ad) - hex($ta);
219 if (($delta > -4096) && ($delta < 4096)) {
227 # first, parse the input into the lines array, but to keep size down,
228 # we only do this for 4Kb around the sweet spot
230 open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
236 if ($line =~ /^([a-f0-9]+)\:/) {
237 if (InRange($1, $target)) {
242 if ($line =~ /^([a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]+)\:/) {
244 if (!InRange($val, $target)) {
247 if ($val eq $target) {
251 $lines[$counter] = $line;
253 $counter = $counter + 1;
260 print "No matching code found \n";
265 print "No matching code found \n";
273 # now we go up and down in the array to find how much we want to print
279 my $line = $lines[$start];
280 if ($line =~ /^([a-f0-9]+)\:/) {
281 $binarylines = $binarylines + 1;
283 $codelines = $codelines + 1;
285 if ($codelines > 10) {
288 if ($binarylines > 20) {
297 while ($finish < $counter) {
298 $finish = $finish + 1;
299 my $line = $lines[$finish];
300 if ($line =~ /^([a-f0-9]+)\:/) {
301 $binarylines = $binarylines + 1;
303 $codelines = $codelines + 1;
305 if ($codelines > 10) {
308 if ($binarylines > 20) {
317 # start annotating the registers in the asm.
318 # this goes from the oopsing point back, so that the annotator
319 # can track (opportunistically) which registers got written and
320 # whos value no longer is relevant.
323 while ($i >= $start) {
324 $reglines[$i] = process_x86_regs($lines[$i], $center - $i);
329 while ($i < $finish) {
332 $line = "*$lines[$i] ";
334 $line = " $lines[$i] ";
337 if (defined($reglines[$i]) && length($reglines[$i]) > 0) {
338 my $c = 60 - length($line);
339 while ($c > 0) { print " "; $c = $c - 1; };
340 print "| $reglines[$i]";
343 print "<--- faulting instruction";