Blame view
scripts/markup_oops.pl
7.51 KB
11df65c3c scripts: add x86 ... |
1 |
#!/usr/bin/perl |
5aea50b5c scripts: script f... |
2 |
|
d32ad102c script: improve m... |
3 |
use File::Basename; |
5aea50b5c scripts: script f... |
4 5 6 7 8 9 10 11 12 13 14 15 16 |
# Copyright 2008, Intel Corporation # # This file is part of the Linux kernel # # This program file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; version 2 of the License. # # Authors: # Arjan van de Ven <arjan@linux.intel.com> my $vmlinux_name = $ARGV[0]; |
d32ad102c script: improve m... |
17 18 19 20 21 22 23 24 |
if (!defined($vmlinux_name)) { my $kerver = `uname -r`; chomp($kerver); $vmlinux_name = "/lib/modules/$kerver/build/vmlinux"; print "No vmlinux specified, assuming $vmlinux_name "; } my $filename = $vmlinux_name; |
5aea50b5c scripts: script f... |
25 26 27 28 29 |
# # Step 1: Parse the oops to find the EIP value # my $target = "0"; |
d32ad102c script: improve m... |
30 31 |
my $function; my $module = ""; |
11df65c3c scripts: add x86 ... |
32 |
my $func_offset = 0; |
d32ad102c script: improve m... |
33 |
my $vmaoffset = 0; |
c19ef7fd8 scripts: add x86 ... |
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 |
my %regs; sub parse_x86_regs { my ($line) = @_; if ($line =~ /EAX: ([0-9a-f]+) EBX: ([0-9a-f]+) ECX: ([0-9a-f]+) EDX: ([0-9a-f]+)/) { $regs{"%eax"} = $1; $regs{"%ebx"} = $2; $regs{"%ecx"} = $3; $regs{"%edx"} = $4; } if ($line =~ /ESI: ([0-9a-f]+) EDI: ([0-9a-f]+) EBP: ([0-9a-f]+) ESP: ([0-9a-f]+)/) { $regs{"%esi"} = $1; $regs{"%edi"} = $2; $regs{"%esp"} = $4; } |
11df65c3c scripts: add x86 ... |
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 |
if ($line =~ /RAX: ([0-9a-f]+) RBX: ([0-9a-f]+) RCX: ([0-9a-f]+)/) { $regs{"%eax"} = $1; $regs{"%ebx"} = $2; $regs{"%ecx"} = $3; } if ($line =~ /RDX: ([0-9a-f]+) RSI: ([0-9a-f]+) RDI: ([0-9a-f]+)/) { $regs{"%edx"} = $1; $regs{"%esi"} = $2; $regs{"%edi"} = $3; } if ($line =~ /RBP: ([0-9a-f]+) R08: ([0-9a-f]+) R09: ([0-9a-f]+)/) { $regs{"%r08"} = $2; $regs{"%r09"} = $3; } if ($line =~ /R10: ([0-9a-f]+) R11: ([0-9a-f]+) R12: ([0-9a-f]+)/) { $regs{"%r10"} = $1; $regs{"%r11"} = $2; $regs{"%r12"} = $3; } if ($line =~ /R13: ([0-9a-f]+) R14: ([0-9a-f]+) R15: ([0-9a-f]+)/) { $regs{"%r13"} = $1; $regs{"%r14"} = $2; $regs{"%r15"} = $3; } } sub reg_name { my ($reg) = @_; $reg =~ s/r(.)x/e\1x/; $reg =~ s/r(.)i/e\1i/; $reg =~ s/r(.)p/e\1p/; return $reg; |
c19ef7fd8 scripts: add x86 ... |
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 |
} sub process_x86_regs { my ($line, $cntr) = @_; my $str = ""; if (length($line) < 40) { return ""; # not an asm istruction } # find the arguments to the instruction if ($line =~ /([0-9a-zA-Z\,\%\(\)\-\+]+)$/) { $lastword = $1; } else { return ""; } # we need to find the registers that get clobbered, # since their value is no longer relevant for previous # instructions in the stream. $clobber = $lastword; # first, remove all memory operands, they're read only $clobber =~ s/\([a-z0-9\%\,]+\)//g; # then, remove everything before the comma, thats the read part $clobber =~ s/.*\,//g; # if this is the instruction that faulted, we haven't actually done # the write yet... nothing is clobbered. if ($cntr == 0) { $clobber = ""; } foreach $reg (keys(%regs)) { |
11df65c3c scripts: add x86 ... |
118 119 |
my $clobberprime = reg_name($clobber); my $lastwordprime = reg_name($lastword); |
c19ef7fd8 scripts: add x86 ... |
120 |
my $val = $regs{$reg}; |
11df65c3c scripts: add x86 ... |
121 122 123 124 125 |
if ($val =~ /^[0]+$/) { $val = "0"; } else { $val =~ s/^0*//; } |
c19ef7fd8 scripts: add x86 ... |
126 127 |
# first check if we're clobbering this register; if we do # we print it with a =>, and then delete its value |
11df65c3c scripts: add x86 ... |
128 |
if ($clobber =~ /$reg/ || $clobberprime =~ /$reg/) { |
c19ef7fd8 scripts: add x86 ... |
129 130 131 132 133 134 135 |
if (length($val) > 0) { $str = $str . " $reg => $val "; } $regs{$reg} = ""; $val = ""; } # now check if we're reading this register |
11df65c3c scripts: add x86 ... |
136 |
if ($lastword =~ /$reg/ || $lastwordprime =~ /$reg/) { |
c19ef7fd8 scripts: add x86 ... |
137 138 139 140 141 142 143 144 145 |
if (length($val) > 0) { $str = $str . " $reg = $val "; } } } return $str; } # parse the oops |
5aea50b5c scripts: script f... |
146 |
while (<STDIN>) { |
d32ad102c script: improve m... |
147 148 |
my $line = $_; if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) { |
5aea50b5c scripts: script f... |
149 150 |
$target = $1; } |
11df65c3c scripts: add x86 ... |
151 152 153 |
if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) { $target = $1; } |
d32ad102c script: improve m... |
154 155 156 157 |
if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) { $function = $1; $func_offset = $2; } |
11df65c3c scripts: add x86 ... |
158 159 160 161 |
if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) { $function = $1; $func_offset = $2; } |
5aea50b5c scripts: script f... |
162 |
|
d32ad102c script: improve m... |
163 164 165 166 |
# check if it's a module if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) { $module = $3; } |
11df65c3c scripts: add x86 ... |
167 168 169 |
if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) { $module = $3; } |
c19ef7fd8 scripts: add x86 ... |
170 |
parse_x86_regs($line); |
5aea50b5c scripts: script f... |
171 |
} |
d32ad102c script: improve m... |
172 |
my $decodestart = hex($target) - hex($func_offset); |
c19ef7fd8 scripts: add x86 ... |
173 |
my $decodestop = hex($target) + 8192; |
5aea50b5c scripts: script f... |
174 175 176 177 178 179 180 181 182 |
if ($target eq "0") { print "No oops found! "; print "Usage: "; print " dmesg | perl scripts/markup_oops.pl vmlinux "; exit; } |
d32ad102c script: improve m... |
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 |
# if it's a module, we need to find the .ko file and calculate a load offset if ($module ne "") { my $dir = dirname($filename); $dir = $dir . "/"; my $mod = $module . ".ko"; my $modulefile = `find $dir -name $mod | head -1`; chomp($modulefile); $filename = $modulefile; if ($filename eq "") { print "Module .ko file for $module not found. Aborting "; exit; } # ok so we found the module, now we need to calculate the vma offset open(FILE, "objdump -dS $filename |") || die "Cannot start objdump"; while (<FILE>) { if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) { my $fu = $1; $vmaoffset = hex($target) - hex($fu) - hex($func_offset); } } close(FILE); } |
5aea50b5c scripts: script f... |
206 207 208 209 |
my $counter = 0; my $state = 0; my $center = 0; my @lines; |
c19ef7fd8 scripts: add x86 ... |
210 |
my @reglines; |
5aea50b5c scripts: script f... |
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 |
sub InRange { my ($address, $target) = @_; my $ad = "0x".$address; my $ta = "0x".$target; my $delta = hex($ad) - hex($ta); if (($delta > -4096) && ($delta < 4096)) { return 1; } return 0; } # first, parse the input into the lines array, but to keep size down, # we only do this for 4Kb around the sweet spot |
d32ad102c script: improve m... |
228 |
open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump"; |
5aea50b5c scripts: script f... |
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 |
while (<FILE>) { my $line = $_; chomp($line); if ($state == 0) { if ($line =~ /^([a-f0-9]+)\:/) { if (InRange($1, $target)) { $state = 1; } } } else { if ($line =~ /^([a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]+)\:/) { my $val = $1; if (!InRange($val, $target)) { last; } if ($val eq $target) { $center = $counter; } } $lines[$counter] = $line; $counter = $counter + 1; } } close(FILE); if ($counter == 0) { print "No matching code found "; exit; } if ($center == 0) { print "No matching code found "; exit; } my $start; my $finish; my $codelines = 0; my $binarylines = 0; # now we go up and down in the array to find how much we want to print $start = $center; while ($start > 1) { $start = $start - 1; my $line = $lines[$start]; if ($line =~ /^([a-f0-9]+)\:/) { $binarylines = $binarylines + 1; } else { $codelines = $codelines + 1; } if ($codelines > 10) { last; } if ($binarylines > 20) { last; } } $finish = $center; $codelines = 0; $binarylines = 0; while ($finish < $counter) { $finish = $finish + 1; my $line = $lines[$finish]; if ($line =~ /^([a-f0-9]+)\:/) { $binarylines = $binarylines + 1; } else { $codelines = $codelines + 1; } if ($codelines > 10) { last; } if ($binarylines > 20) { last; } } my $i; |
c19ef7fd8 scripts: add x86 ... |
315 316 317 318 319 320 321 322 323 324 325 |
# start annotating the registers in the asm. # this goes from the oopsing point back, so that the annotator # can track (opportunistically) which registers got written and # whos value no longer is relevant. $i = $center; while ($i >= $start) { $reglines[$i] = process_x86_regs($lines[$i], $center - $i); $i = $i - 1; } |
5aea50b5c scripts: script f... |
326 327 |
$i = $start; while ($i < $finish) { |
c19ef7fd8 scripts: add x86 ... |
328 |
my $line; |
5aea50b5c scripts: script f... |
329 |
if ($i == $center) { |
c19ef7fd8 scripts: add x86 ... |
330 |
$line = "*$lines[$i] "; |
5aea50b5c scripts: script f... |
331 |
} else { |
c19ef7fd8 scripts: add x86 ... |
332 333 334 335 336 337 338 |
$line = " $lines[$i] "; } print $line; if (defined($reglines[$i]) && length($reglines[$i]) > 0) { my $c = 60 - length($line); while ($c > 0) { print " "; $c = $c - 1; }; print "| $reglines[$i]"; |
5aea50b5c scripts: script f... |
339 |
} |
c19ef7fd8 scripts: add x86 ... |
340 341 342 343 344 |
if ($i == $center) { print "<--- faulting instruction"; } print " "; |
5aea50b5c scripts: script f... |
345 346 |
$i = $i +1; } |