Eric Lee / smarc-ti-linux-kernel

Download as
Browse Code ยป

Commit 52e13e219d5930fb8fb774050e6ecffa244a60a9

Authored by Hui Zhu
Committed by Michal Marek
1 parent d224a94ab9
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

markup_oops.pl: add options to improve cross-sompilation environments 

The markup_oops.pl have 3 troubles to support cross-compiler environment:
1.  It use objdump directly.
2.  It use modinfo to get the message of module.
3.  It use hex function that cannot support 64-bit number in 32-bit arch.

This patch add 3 options to markup_oops.pl:
1. -c CROSS_COMPILE	Specify the prefix used for toolchain.
2. -m MODULE_DIRNAME	Specify the module directory name.
3. Change hex function to Math::BigInt->from_hex.

After this patch, parse the x8664 oops in x86, we can:
cat amd64m | perl ~/kernel/tmp/m.pl -c /home/teawater/kernel/bin/x8664- -m ./e.ko vmlinux

Thanks,
Hui

Signed-off-by: Hui Zhu <teawater@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: ozan@pardus.org.tr
Cc: Matthew Wilcox <willy@linux.intel.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

Showing 1 changed file with 36 additions and 13 deletions Inline Diff

scripts/markup_oops.pl
Diff comments   View file @ 52e13e2
1 #!/usr/bin/perl 1 #!/usr/bin/perl
2 2
3 use File::Basename; 3 use File::Basename;
4 use Math::BigInt; 4 use Math::BigInt;
5 use Getopt::Long;
5 6
6 # Copyright 2008, Intel Corporation 7 # Copyright 2008, Intel Corporation
7 # 8 #
8 # This file is part of the Linux kernel 9 # This file is part of the Linux kernel
9 # 10 #
10 # This program file is free software; you can redistribute it and/or modify it 11 # This program file is free software; you can redistribute it and/or modify it
11 # under the terms of the GNU General Public License as published by the 12 # under the terms of the GNU General Public License as published by the
12 # Free Software Foundation; version 2 of the License. 13 # Free Software Foundation; version 2 of the License.
13 # 14 #
14 # Authors: 15 # Authors:
15 # Arjan van de Ven <arjan@linux.intel.com> 16 # Arjan van de Ven <arjan@linux.intel.com>
16 17
17 18
18 my $vmlinux_name = $ARGV[0]; 19 my $cross_compile = "";
20 my $vmlinux_name = "";
21 my $modulefile = "";
22
23 # Get options
24 Getopt::Long::GetOptions(
25 'cross-compile|c=s' => \$cross_compile,
26 'module|m=s' => \$modulefile,
27 'help|h' => \&usage,
28 );
29 my $vmlinux_name = $ARGV[$#ARGV];
19 if (!defined($vmlinux_name)) { 30 if (!defined($vmlinux_name)) {
20 my $kerver = `uname -r`; 31 my $kerver = `uname -r`;
21 chomp($kerver); 32 chomp($kerver);
22 $vmlinux_name = "/lib/modules/$kerver/build/vmlinux"; 33 $vmlinux_name = "/lib/modules/$kerver/build/vmlinux";
23 print "No vmlinux specified, assuming $vmlinux_name\n"; 34 print "No vmlinux specified, assuming $vmlinux_name\n";
24 } 35 }
25 my $filename = $vmlinux_name; 36 my $filename = $vmlinux_name;
26 #
27 # Step 1: Parse the oops to find the EIP value
28 #
29 37
38 # Parse the oops to find the EIP value
39
30 my $target = "0"; 40 my $target = "0";
31 my $function; 41 my $function;
32 my $module = ""; 42 my $module = "";
33 my $func_offset = 0; 43 my $func_offset = 0;
34 my $vmaoffset = 0; 44 my $vmaoffset = 0;
35 45
36 my %regs; 46 my %regs;
37 47
38 48
39 sub parse_x86_regs 49 sub parse_x86_regs
40 { 50 {
41 my ($line) = @_; 51 my ($line) = @_;
42 if ($line =~ /EAX: ([0-9a-f]+) EBX: ([0-9a-f]+) ECX: ([0-9a-f]+) EDX: ([0-9a-f]+)/) { 52 if ($line =~ /EAX: ([0-9a-f]+) EBX: ([0-9a-f]+) ECX: ([0-9a-f]+) EDX: ([0-9a-f]+)/) {
43 $regs{"%eax"} = $1; 53 $regs{"%eax"} = $1;
44 $regs{"%ebx"} = $2; 54 $regs{"%ebx"} = $2;
45 $regs{"%ecx"} = $3; 55 $regs{"%ecx"} = $3;
46 $regs{"%edx"} = $4; 56 $regs{"%edx"} = $4;
47 } 57 }
48 if ($line =~ /ESI: ([0-9a-f]+) EDI: ([0-9a-f]+) EBP: ([0-9a-f]+) ESP: ([0-9a-f]+)/) { 58 if ($line =~ /ESI: ([0-9a-f]+) EDI: ([0-9a-f]+) EBP: ([0-9a-f]+) ESP: ([0-9a-f]+)/) {
49 $regs{"%esi"} = $1; 59 $regs{"%esi"} = $1;
50 $regs{"%edi"} = $2; 60 $regs{"%edi"} = $2;
51 $regs{"%esp"} = $4; 61 $regs{"%esp"} = $4;
52 } 62 }
53 if ($line =~ /RAX: ([0-9a-f]+) RBX: ([0-9a-f]+) RCX: ([0-9a-f]+)/) { 63 if ($line =~ /RAX: ([0-9a-f]+) RBX: ([0-9a-f]+) RCX: ([0-9a-f]+)/) {
54 $regs{"%eax"} = $1; 64 $regs{"%eax"} = $1;
55 $regs{"%ebx"} = $2; 65 $regs{"%ebx"} = $2;
56 $regs{"%ecx"} = $3; 66 $regs{"%ecx"} = $3;
57 } 67 }
58 if ($line =~ /RDX: ([0-9a-f]+) RSI: ([0-9a-f]+) RDI: ([0-9a-f]+)/) { 68 if ($line =~ /RDX: ([0-9a-f]+) RSI: ([0-9a-f]+) RDI: ([0-9a-f]+)/) {
59 $regs{"%edx"} = $1; 69 $regs{"%edx"} = $1;
60 $regs{"%esi"} = $2; 70 $regs{"%esi"} = $2;
61 $regs{"%edi"} = $3; 71 $regs{"%edi"} = $3;
62 } 72 }
63 if ($line =~ /RBP: ([0-9a-f]+) R08: ([0-9a-f]+) R09: ([0-9a-f]+)/) { 73 if ($line =~ /RBP: ([0-9a-f]+) R08: ([0-9a-f]+) R09: ([0-9a-f]+)/) {
64 $regs{"%r08"} = $2; 74 $regs{"%r08"} = $2;
65 $regs{"%r09"} = $3; 75 $regs{"%r09"} = $3;
66 } 76 }
67 if ($line =~ /R10: ([0-9a-f]+) R11: ([0-9a-f]+) R12: ([0-9a-f]+)/) { 77 if ($line =~ /R10: ([0-9a-f]+) R11: ([0-9a-f]+) R12: ([0-9a-f]+)/) {
68 $regs{"%r10"} = $1; 78 $regs{"%r10"} = $1;
69 $regs{"%r11"} = $2; 79 $regs{"%r11"} = $2;
70 $regs{"%r12"} = $3; 80 $regs{"%r12"} = $3;
71 } 81 }
72 if ($line =~ /R13: ([0-9a-f]+) R14: ([0-9a-f]+) R15: ([0-9a-f]+)/) { 82 if ($line =~ /R13: ([0-9a-f]+) R14: ([0-9a-f]+) R15: ([0-9a-f]+)/) {
73 $regs{"%r13"} = $1; 83 $regs{"%r13"} = $1;
74 $regs{"%r14"} = $2; 84 $regs{"%r14"} = $2;
75 $regs{"%r15"} = $3; 85 $regs{"%r15"} = $3;
76 } 86 }
77 } 87 }
78 88
79 sub reg_name 89 sub reg_name
80 { 90 {
81 my ($reg) = @_; 91 my ($reg) = @_;
82 $reg =~ s/r(.)x/e\1x/; 92 $reg =~ s/r(.)x/e\1x/;
83 $reg =~ s/r(.)i/e\1i/; 93 $reg =~ s/r(.)i/e\1i/;
84 $reg =~ s/r(.)p/e\1p/; 94 $reg =~ s/r(.)p/e\1p/;
85 return $reg; 95 return $reg;
86 } 96 }
87 97
88 sub process_x86_regs 98 sub process_x86_regs
89 { 99 {
90 my ($line, $cntr) = @_; 100 my ($line, $cntr) = @_;
91 my $str = ""; 101 my $str = "";
92 if (length($line) < 40) { 102 if (length($line) < 40) {
93 return ""; # not an asm istruction 103 return ""; # not an asm istruction
94 } 104 }
95 105
96 # find the arguments to the instruction 106 # find the arguments to the instruction
97 if ($line =~ /([0-9a-zA-Z\,\%\(\)\-\+]+)$/) { 107 if ($line =~ /([0-9a-zA-Z\,\%\(\)\-\+]+)$/) {
98 $lastword = $1; 108 $lastword = $1;
99 } else { 109 } else {
100 return ""; 110 return "";
101 } 111 }
102 112
103 # we need to find the registers that get clobbered, 113 # we need to find the registers that get clobbered,
104 # since their value is no longer relevant for previous 114 # since their value is no longer relevant for previous
105 # instructions in the stream. 115 # instructions in the stream.
106 116
107 $clobber = $lastword; 117 $clobber = $lastword;
108 # first, remove all memory operands, they're read only 118 # first, remove all memory operands, they're read only
109 $clobber =~ s/\([a-z0-9\%\,]+\)//g; 119 $clobber =~ s/\([a-z0-9\%\,]+\)//g;
110 # then, remove everything before the comma, thats the read part 120 # then, remove everything before the comma, thats the read part
111 $clobber =~ s/.*\,//g; 121 $clobber =~ s/.*\,//g;
112 122
113 # if this is the instruction that faulted, we haven't actually done 123 # if this is the instruction that faulted, we haven't actually done
114 # the write yet... nothing is clobbered. 124 # the write yet... nothing is clobbered.
115 if ($cntr == 0) { 125 if ($cntr == 0) {
116 $clobber = ""; 126 $clobber = "";
117 } 127 }
118 128
119 foreach $reg (keys(%regs)) { 129 foreach $reg (keys(%regs)) {
120 my $clobberprime = reg_name($clobber); 130 my $clobberprime = reg_name($clobber);
121 my $lastwordprime = reg_name($lastword); 131 my $lastwordprime = reg_name($lastword);
122 my $val = $regs{$reg}; 132 my $val = $regs{$reg};
123 if ($val =~ /^[0]+$/) { 133 if ($val =~ /^[0]+$/) {
124 $val = "0"; 134 $val = "0";
125 } else { 135 } else {
126 $val =~ s/^0*//; 136 $val =~ s/^0*//;
127 } 137 }
128 138
129 # first check if we're clobbering this register; if we do 139 # first check if we're clobbering this register; if we do
130 # we print it with a =>, and then delete its value 140 # we print it with a =>, and then delete its value
131 if ($clobber =~ /$reg/ || $clobberprime =~ /$reg/) { 141 if ($clobber =~ /$reg/ || $clobberprime =~ /$reg/) {
132 if (length($val) > 0) { 142 if (length($val) > 0) {
133 $str = $str . " $reg => $val "; 143 $str = $str . " $reg => $val ";
134 } 144 }
135 $regs{$reg} = ""; 145 $regs{$reg} = "";
136 $val = ""; 146 $val = "";
137 } 147 }
138 # now check if we're reading this register 148 # now check if we're reading this register
139 if ($lastword =~ /$reg/ || $lastwordprime =~ /$reg/) { 149 if ($lastword =~ /$reg/ || $lastwordprime =~ /$reg/) {
140 if (length($val) > 0) { 150 if (length($val) > 0) {
141 $str = $str . " $reg = $val "; 151 $str = $str . " $reg = $val ";
142 } 152 }
143 } 153 }
144 } 154 }
145 return $str; 155 return $str;
146 } 156 }
147 157
148 # parse the oops 158 # parse the oops
149 while (<STDIN>) { 159 while (<STDIN>) {
150 my $line = $_; 160 my $line = $_;
151 if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) { 161 if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) {
152 $target = $1; 162 $target = $1;
153 } 163 }
154 if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) { 164 if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) {
155 $target = $1; 165 $target = $1;
156 } 166 }
157 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+0x([0-9a-f]+)\/0x[a-f0-9]/) { 167 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+0x([0-9a-f]+)\/0x[a-f0-9]/) {
158 $function = $1; 168 $function = $1;
159 $func_offset = $2; 169 $func_offset = $2;
160 } 170 }
161 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) { 171 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
162 $function = $1; 172 $function = $1;
163 $func_offset = $2; 173 $func_offset = $2;
164 } 174 }
165 175
166 # check if it's a module 176 # check if it's a module
167 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) { 177 if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
168 $module = $3; 178 $module = $3;
169 } 179 }
170 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) { 180 if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\] \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
171 $module = $3; 181 $module = $3;
172 } 182 }
173 parse_x86_regs($line); 183 parse_x86_regs($line);
174 } 184 }
175 185
176 my $decodestart = Math::BigInt->from_hex("0x$target") - Math::BigInt->from_hex("0x$func_offset"); 186 my $decodestart = Math::BigInt->from_hex("0x$target") - Math::BigInt->from_hex("0x$func_offset");
177 my $decodestop = Math::BigInt->from_hex("0x$target") + 8192; 187 my $decodestop = Math::BigInt->from_hex("0x$target") + 8192;
178 if ($target eq "0") { 188 if ($target eq "0") {
179 print "No oops found!\n"; 189 print "No oops found!\n";
180 print "Usage: \n"; 190 usage();
181 print " dmesg | perl scripts/markup_oops.pl vmlinux\n";
182 exit;
183 } 191 }
184 192
185 # if it's a module, we need to find the .ko file and calculate a load offset 193 # if it's a module, we need to find the .ko file and calculate a load offset
186 if ($module ne "") { 194 if ($module ne "") {
187 my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`; 195 if ($modulefile eq "") {
188 chomp($modulefile); 196 my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`;
197 chomp($modulefile);
198 }
189 $filename = $modulefile; 199 $filename = $modulefile;
190 if ($filename eq "") { 200 if ($filename eq "") {
191 print "Module .ko file for $module not found. Aborting\n"; 201 print "Module .ko file for $module not found. Aborting\n";
192 exit; 202 exit;
193 } 203 }
194 # ok so we found the module, now we need to calculate the vma offset 204 # ok so we found the module, now we need to calculate the vma offset
195 open(FILE, "objdump -dS $filename |") || die "Cannot start objdump"; 205 open(FILE, $cross_compile."objdump -dS $filename |") || die "Cannot start objdump";
196 while (<FILE>) { 206 while (<FILE>) {
197 if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) { 207 if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) {
198 my $fu = $1; 208 my $fu = $1;
199 $vmaoffset = hex($target) - hex($fu) - hex($func_offset); 209 $vmaoffset = Math::BigInt->from_hex("0x$target") - Math::BigInt->from_hex("0x$fu") - Math::BigInt->from_hex("0x$func_offset");
200 } 210 }
201 } 211 }
202 close(FILE); 212 close(FILE);
203 } 213 }
204 214
205 my $counter = 0; 215 my $counter = 0;
206 my $state = 0; 216 my $state = 0;
207 my $center = -1; 217 my $center = -1;
208 my @lines; 218 my @lines;
209 my @reglines; 219 my @reglines;
210 220
211 sub InRange { 221 sub InRange {
212 my ($address, $target) = @_; 222 my ($address, $target) = @_;
213 my $ad = "0x".$address; 223 my $ad = "0x".$address;
214 my $ta = "0x".$target; 224 my $ta = "0x".$target;
215 my $delta = hex($ad) - hex($ta); 225 my $delta = Math::BigInt->from_hex($ad) - Math::BigInt->from_hex($ta);
216 226
217 if (($delta > -4096) && ($delta < 4096)) { 227 if (($delta > -4096) && ($delta < 4096)) {
218 return 1; 228 return 1;
219 } 229 }
220 return 0; 230 return 0;
221 } 231 }
222 232
223 233
224 234
225 # first, parse the input into the lines array, but to keep size down, 235 # first, parse the input into the lines array, but to keep size down,
226 # we only do this for 4Kb around the sweet spot 236 # we only do this for 4Kb around the sweet spot
227 237
228 open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump"; 238 open(FILE, $cross_compile."objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
229 239
230 while (<FILE>) { 240 while (<FILE>) {
231 my $line = $_; 241 my $line = $_;
232 chomp($line); 242 chomp($line);
233 if ($state == 0) { 243 if ($state == 0) {
234 if ($line =~ /^([a-f0-9]+)\:/) { 244 if ($line =~ /^([a-f0-9]+)\:/) {
235 if (InRange($1, $target)) { 245 if (InRange($1, $target)) {
236 $state = 1; 246 $state = 1;
237 } 247 }
238 } 248 }
239 } 249 }
240 if ($state == 1) { 250 if ($state == 1) {
241 if ($line =~ /^([a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]+)\:/) { 251 if ($line =~ /^([a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]+)\:/) {
242 my $val = $1; 252 my $val = $1;
243 if (!InRange($val, $target)) { 253 if (!InRange($val, $target)) {
244 last; 254 last;
245 } 255 }
246 if ($val eq $target) { 256 if ($val eq $target) {
247 $center = $counter; 257 $center = $counter;
248 } 258 }
249 } 259 }
250 $lines[$counter] = $line; 260 $lines[$counter] = $line;
251 261
252 $counter = $counter + 1; 262 $counter = $counter + 1;
253 } 263 }
254 } 264 }
255 265
256 close(FILE); 266 close(FILE);
257 267
258 if ($counter == 0) { 268 if ($counter == 0) {
259 print "No matching code found \n"; 269 print "No matching code found \n";
260 exit; 270 exit;
261 } 271 }
262 272
263 if ($center == -1) { 273 if ($center == -1) {
264 print "No matching code found \n"; 274 print "No matching code found \n";
265 exit; 275 exit;
266 } 276 }
267 277
268 my $start; 278 my $start;
269 my $finish; 279 my $finish;
270 my $codelines = 0; 280 my $codelines = 0;
271 my $binarylines = 0; 281 my $binarylines = 0;
272 # now we go up and down in the array to find how much we want to print 282 # now we go up and down in the array to find how much we want to print
273 283
274 $start = $center; 284 $start = $center;
275 285
276 while ($start > 1) { 286 while ($start > 1) {
277 $start = $start - 1; 287 $start = $start - 1;
278 my $line = $lines[$start]; 288 my $line = $lines[$start];
279 if ($line =~ /^([a-f0-9]+)\:/) { 289 if ($line =~ /^([a-f0-9]+)\:/) {
280 $binarylines = $binarylines + 1; 290 $binarylines = $binarylines + 1;
281 } else { 291 } else {
282 $codelines = $codelines + 1; 292 $codelines = $codelines + 1;
283 } 293 }
284 if ($codelines > 10) { 294 if ($codelines > 10) {
285 last; 295 last;
286 } 296 }
287 if ($binarylines > 20) { 297 if ($binarylines > 20) {
288 last; 298 last;
289 } 299 }
290 } 300 }
291 301
292 302
293 $finish = $center; 303 $finish = $center;
294 $codelines = 0; 304 $codelines = 0;
295 $binarylines = 0; 305 $binarylines = 0;
296 while ($finish < $counter) { 306 while ($finish < $counter) {
297 $finish = $finish + 1; 307 $finish = $finish + 1;
298 my $line = $lines[$finish]; 308 my $line = $lines[$finish];
299 if ($line =~ /^([a-f0-9]+)\:/) { 309 if ($line =~ /^([a-f0-9]+)\:/) {
300 $binarylines = $binarylines + 1; 310 $binarylines = $binarylines + 1;
301 } else { 311 } else {
302 $codelines = $codelines + 1; 312 $codelines = $codelines + 1;
303 } 313 }
304 if ($codelines > 10) { 314 if ($codelines > 10) {
305 last; 315 last;
306 } 316 }
307 if ($binarylines > 20) { 317 if ($binarylines > 20) {
308 last; 318 last;
309 } 319 }
310 } 320 }
311 321
312 322
313 my $i; 323 my $i;
314 324
315 325
316 # start annotating the registers in the asm. 326 # start annotating the registers in the asm.
317 # this goes from the oopsing point back, so that the annotator 327 # this goes from the oopsing point back, so that the annotator
318 # can track (opportunistically) which registers got written and 328 # can track (opportunistically) which registers got written and
319 # whos value no longer is relevant. 329 # whos value no longer is relevant.
320 330
321 $i = $center; 331 $i = $center;
322 while ($i >= $start) { 332 while ($i >= $start) {
323 $reglines[$i] = process_x86_regs($lines[$i], $center - $i); 333 $reglines[$i] = process_x86_regs($lines[$i], $center - $i);
324 $i = $i - 1; 334 $i = $i - 1;
325 } 335 }
326 336
327 $i = $start; 337 $i = $start;
328 while ($i < $finish) { 338 while ($i < $finish) {
329 my $line; 339 my $line;
330 if ($i == $center) { 340 if ($i == $center) {
331 $line = "*$lines[$i] "; 341 $line = "*$lines[$i] ";
332 } else { 342 } else {
333 $line = " $lines[$i] "; 343 $line = " $lines[$i] ";
334 } 344 }
335 print $line; 345 print $line;
336 if (defined($reglines[$i]) && length($reglines[$i]) > 0) { 346 if (defined($reglines[$i]) && length($reglines[$i]) > 0) {
337 my $c = 60 - length($line); 347 my $c = 60 - length($line);
338 while ($c > 0) { print " "; $c = $c - 1; }; 348 while ($c > 0) { print " "; $c = $c - 1; };
339 print "| $reglines[$i]"; 349 print "| $reglines[$i]";
340 } 350 }
341 if ($i == $center) { 351 if ($i == $center) {
342 print "<--- faulting instruction"; 352 print "<--- faulting instruction";
343 } 353 }
344 print "\n"; 354 print "\n";
345 $i = $i +1; 355 $i = $i +1;
356 }
357
358 sub usage {
359 print <<EOT;
360 Usage:
361 dmesg | perl $0 [OPTION] [VMLINUX]
362
363 OPTION:
364 -c, --cross-compile CROSS_COMPILE Specify the prefix used for toolchain.
365 -m, --module MODULE_DIRNAME Specify the module directory name.
366 -h, --help Help.