1 #!/usr/bin/env perl 1 #!/usr/bin/env perl
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 # 3 #
4 # Copyright 2005-2009 - Steven Rostedt 4 # Copyright 2005-2009 - Steven Rostedt
5 # 5 #
6 # It's simple enough to figure out how this w 6 # It's simple enough to figure out how this works.
7 # If not, then you can ask me at stripconfig@ 7 # If not, then you can ask me at stripconfig@goodmis.org
8 # 8 #
9 # What it does? 9 # What it does?
10 # 10 #
11 # If you have installed a Linux kernel from 11 # If you have installed a Linux kernel from a distribution
12 # that turns on way too many modules than yo 12 # that turns on way too many modules than you need, and
13 # you only want the modules you use, then th 13 # you only want the modules you use, then this program
14 # is perfect for you. 14 # is perfect for you.
15 # 15 #
16 # It gives you the ability to turn off all t 16 # It gives you the ability to turn off all the modules that are
17 # not loaded on your system. 17 # not loaded on your system.
18 # 18 #
19 # Howto: 19 # Howto:
20 # 20 #
21 # 1. Boot up the kernel that you want to stre 21 # 1. Boot up the kernel that you want to stream line the config on.
22 # 2. Change directory to the directory holdin 22 # 2. Change directory to the directory holding the source of the
23 # kernel that you just booted. 23 # kernel that you just booted.
24 # 3. Copy the configuration file to this dire !! 24 # 3. Copy the configuraton file to this directory as .config
25 # 4. Have all your devices that you need modu 25 # 4. Have all your devices that you need modules for connected and
26 # operational (make sure that their corre 26 # operational (make sure that their corresponding modules are loaded)
27 # 5. Run this script redirecting the output t 27 # 5. Run this script redirecting the output to some other file
28 # like config_strip. 28 # like config_strip.
29 # 6. Back up your old config (if you want too 29 # 6. Back up your old config (if you want too).
30 # 7. copy the config_strip file to .config 30 # 7. copy the config_strip file to .config
31 # 8. Run "make oldconfig" 31 # 8. Run "make oldconfig"
32 # 32 #
33 # Now your kernel is ready to be built with o 33 # Now your kernel is ready to be built with only the modules that
34 # are loaded. 34 # are loaded.
35 # 35 #
36 # Here's what I did with my Debian distributio 36 # Here's what I did with my Debian distribution.
37 # 37 #
38 # cd /usr/src/linux-2.6.10 38 # cd /usr/src/linux-2.6.10
39 # cp /boot/config-2.6.10-1-686-smp .config 39 # cp /boot/config-2.6.10-1-686-smp .config
40 # ~/bin/streamline_config > config_strip 40 # ~/bin/streamline_config > config_strip
41 # mv .config config_sav 41 # mv .config config_sav
42 # mv config_strip .config 42 # mv config_strip .config
43 # make oldconfig 43 # make oldconfig
44 # 44 #
45 use warnings; 45 use warnings;
46 use strict; 46 use strict;
47 use Getopt::Long; 47 use Getopt::Long;
48 48
49 # set the environment variable LOCALMODCONFIG_ 49 # set the environment variable LOCALMODCONFIG_DEBUG to get
50 # debug output. 50 # debug output.
51 my $debugprint = 0; 51 my $debugprint = 0;
52 $debugprint = 1 if (defined($ENV{LOCALMODCONFI 52 $debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG}));
53 53
54 sub dprint { 54 sub dprint {
55 return if (!$debugprint); 55 return if (!$debugprint);
56 print STDERR @_; 56 print STDERR @_;
57 } 57 }
58 58
59 my $uname = `uname -r`; 59 my $uname = `uname -r`;
60 chomp $uname; 60 chomp $uname;
61 61
62 my @searchconfigs = ( 62 my @searchconfigs = (
63 { 63 {
64 "file" => ".config", 64 "file" => ".config",
65 "exec" => "cat", 65 "exec" => "cat",
66 }, 66 },
67 { 67 {
68 "file" => "/proc/config.gz", 68 "file" => "/proc/config.gz",
69 "exec" => "zcat", 69 "exec" => "zcat",
70 }, 70 },
71 { 71 {
72 "file" => "/boot/config-$uname", 72 "file" => "/boot/config-$uname",
73 "exec" => "cat", 73 "exec" => "cat",
74 }, 74 },
75 { 75 {
76 "file" => "/boot/vmlinuz-$uname", 76 "file" => "/boot/vmlinuz-$uname",
77 "exec" => "scripts/extract-ikconfi 77 "exec" => "scripts/extract-ikconfig",
78 "test" => "scripts/extract-ikconfi 78 "test" => "scripts/extract-ikconfig",
79 }, 79 },
80 { 80 {
81 "file" => "vmlinux", 81 "file" => "vmlinux",
82 "exec" => "scripts/extract-ikconfi 82 "exec" => "scripts/extract-ikconfig",
83 "test" => "scripts/extract-ikconfi 83 "test" => "scripts/extract-ikconfig",
84 }, 84 },
85 { 85 {
86 "file" => "/lib/modules/$uname/ker 86 "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
87 "exec" => "scripts/extract-ikconfi 87 "exec" => "scripts/extract-ikconfig",
88 "test" => "scripts/extract-ikconfi 88 "test" => "scripts/extract-ikconfig",
89 }, 89 },
90 { 90 {
91 "file" => "kernel/configs.ko", 91 "file" => "kernel/configs.ko",
92 "exec" => "scripts/extract-ikconfi 92 "exec" => "scripts/extract-ikconfig",
93 "test" => "scripts/extract-ikconfi 93 "test" => "scripts/extract-ikconfig",
94 }, 94 },
95 { 95 {
96 "file" => "kernel/configs.o", 96 "file" => "kernel/configs.o",
97 "exec" => "scripts/extract-ikconfi 97 "exec" => "scripts/extract-ikconfig",
98 "test" => "scripts/extract-ikconfi 98 "test" => "scripts/extract-ikconfig",
99 }, 99 },
100 ); 100 );
101 101
102 sub read_config { 102 sub read_config {
103 foreach my $conf (@searchconfigs) { 103 foreach my $conf (@searchconfigs) {
104 my $file = $conf->{"file"}; 104 my $file = $conf->{"file"};
105 105
106 next if ( ! -f "$file"); 106 next if ( ! -f "$file");
107 107
108 if (defined($conf->{"test"})) { 108 if (defined($conf->{"test"})) {
109 `$conf->{"test"} $conf->{"file"} 2 109 `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
110 next if ($?); 110 next if ($?);
111 } 111 }
112 112
113 my $exec = $conf->{"exec"}; 113 my $exec = $conf->{"exec"};
114 114
115 print STDERR "using config: '$file'\n" 115 print STDERR "using config: '$file'\n";
116 116
117 open(my $infile, '-|', "$exec $file") 117 open(my $infile, '-|', "$exec $file") || die "Failed to run $exec $file";
118 my @x = <$infile>; 118 my @x = <$infile>;
119 close $infile; 119 close $infile;
120 return @x; 120 return @x;
121 } 121 }
122 die "No config file found"; 122 die "No config file found";
123 } 123 }
124 124
125 my @config_file = read_config; 125 my @config_file = read_config;
126 126
127 # Parse options 127 # Parse options
128 my $localmodconfig = 0; 128 my $localmodconfig = 0;
129 my $localyesconfig = 0; 129 my $localyesconfig = 0;
130 130
131 GetOptions("localmodconfig" => \$localmodconfi 131 GetOptions("localmodconfig" => \$localmodconfig,
132 "localyesconfig" => \$localyesconfi 132 "localyesconfig" => \$localyesconfig);
133 133
134 # Get the build source and top level Kconfig f 134 # Get the build source and top level Kconfig file (passed in)
135 my $ksource = ($ARGV[0] ? $ARGV[0] : '.'); 135 my $ksource = ($ARGV[0] ? $ARGV[0] : '.');
136 my $kconfig = $ARGV[1]; 136 my $kconfig = $ARGV[1];
137 my $lsmod_file = $ENV{'LSMOD'}; 137 my $lsmod_file = $ENV{'LSMOD'};
138 138
139 my @makefiles = `find $ksource -name Makefile 139 my @makefiles = `find $ksource -name Makefile -or -name Kbuild 2>/dev/null`;
140 chomp @makefiles; 140 chomp @makefiles;
141 141
142 my %depends; 142 my %depends;
143 my %selects; 143 my %selects;
144 my %prompts; 144 my %prompts;
145 my %objects; 145 my %objects;
146 my %config2kfile; <<
147 my $var; 146 my $var;
148 my $iflevel = 0; 147 my $iflevel = 0;
149 my @ifdeps; 148 my @ifdeps;
150 149
151 # prevent recursion 150 # prevent recursion
152 my %read_kconfigs; 151 my %read_kconfigs;
153 152
154 sub read_kconfig { 153 sub read_kconfig {
155 my ($kconfig) = @_; 154 my ($kconfig) = @_;
156 155
157 my $state = "NONE"; 156 my $state = "NONE";
158 my $config; 157 my $config;
159 158
160 my $cont = 0; 159 my $cont = 0;
161 my $line; 160 my $line;
162 161
163 my $source = "$ksource/$kconfig"; 162 my $source = "$ksource/$kconfig";
164 my $last_source = ""; 163 my $last_source = "";
165 164
166 # Check for any environment variables used 165 # Check for any environment variables used
167 while ($source =~ /\$\((\w+)\)/ && $last_s 166 while ($source =~ /\$\((\w+)\)/ && $last_source ne $source) {
168 my $env = $1; 167 my $env = $1;
169 $last_source = $source; 168 $last_source = $source;
170 $source =~ s/\$\($env\)/$ENV{$env}/; 169 $source =~ s/\$\($env\)/$ENV{$env}/;
171 } 170 }
172 171
173 open(my $kinfile, '<', $source) || die "Ca !! 172 open(my $kinfile, '<', $source) || die "Can't open $kconfig";
174 while (<$kinfile>) { 173 while (<$kinfile>) {
175 chomp; 174 chomp;
176 175
177 # Make sure that lines ending with \ c 176 # Make sure that lines ending with \ continue
178 if ($cont) { 177 if ($cont) {
179 $_ = $line . " " . $_; 178 $_ = $line . " " . $_;
180 } 179 }
181 180
182 if (s/\\$//) { 181 if (s/\\$//) {
183 $cont = 1; 182 $cont = 1;
184 $line = $_; 183 $line = $_;
185 next; 184 next;
186 } 185 }
187 186
188 $cont = 0; 187 $cont = 0;
189 188
190 # collect any Kconfig sources 189 # collect any Kconfig sources
191 if (/^source\s+"?([^"]+)/) { 190 if (/^source\s+"?([^"]+)/) {
192 my $kconfig = $1; 191 my $kconfig = $1;
193 # prevent reading twice. 192 # prevent reading twice.
194 if (!defined($read_kconfigs{$kconf 193 if (!defined($read_kconfigs{$kconfig})) {
195 $read_kconfigs{$kconfig} = 1; 194 $read_kconfigs{$kconfig} = 1;
196 read_kconfig($kconfig); 195 read_kconfig($kconfig);
197 } 196 }
198 next; 197 next;
199 } 198 }
200 199
201 # configs found 200 # configs found
202 if (/^\s*(menu)?config\s+(\S+)\s*$/) { 201 if (/^\s*(menu)?config\s+(\S+)\s*$/) {
203 $state = "NEW"; 202 $state = "NEW";
204 $config = $2; 203 $config = $2;
205 $config2kfile{"CONFIG_$config"} = <<
206 204
207 # Add depends for 'if' nesting 205 # Add depends for 'if' nesting
208 for (my $i = 0; $i < $iflevel; $i+ 206 for (my $i = 0; $i < $iflevel; $i++) {
209 if ($i) { 207 if ($i) {
210 $depends{$config} .= " " . 208 $depends{$config} .= " " . $ifdeps[$i];
211 } else { 209 } else {
212 $depends{$config} = $ifdep 210 $depends{$config} = $ifdeps[$i];
213 } 211 }
214 $state = "DEP"; 212 $state = "DEP";
215 } 213 }
216 214
217 # collect the depends for the config 215 # collect the depends for the config
218 } elsif ($state eq "NEW" && /^\s*depen 216 } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
219 $state = "DEP"; 217 $state = "DEP";
220 $depends{$config} = $1; 218 $depends{$config} = $1;
221 } elsif ($state eq "DEP" && /^\s*depen 219 } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
222 $depends{$config} .= " " . $1; 220 $depends{$config} .= " " . $1;
223 } elsif ($state eq "DEP" && /^\s*def(_ 221 } elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) {
224 my $dep = $3; 222 my $dep = $3;
225 if ($dep !~ /^\s*(y|m|n)\s*$/) { 223 if ($dep !~ /^\s*(y|m|n)\s*$/) {
226 $dep =~ s/.*\sif\s+//; 224 $dep =~ s/.*\sif\s+//;
227 $depends{$config} .= " " . $de 225 $depends{$config} .= " " . $dep;
228 dprint "Added default depends 226 dprint "Added default depends $dep to $config\n";
229 } 227 }
230 228
231 # Get the configs that select this con 229 # Get the configs that select this config
232 } elsif ($state ne "NONE" && /^\s*sele 230 } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
233 my $conf = $1; 231 my $conf = $1;
234 if (defined($selects{$conf})) { 232 if (defined($selects{$conf})) {
235 $selects{$conf} .= " " . $conf 233 $selects{$conf} .= " " . $config;
236 } else { 234 } else {
237 $selects{$conf} = $config; 235 $selects{$conf} = $config;
238 } 236 }
239 237
240 # configs without prompts must be sele 238 # configs without prompts must be selected
241 } elsif ($state ne "NONE" && /^\s*(tri 239 } elsif ($state ne "NONE" && /^\s*(tristate\s+\S|prompt\b)/) {
242 # note if the config has a prompt 240 # note if the config has a prompt
243 $prompts{$config} = 1; 241 $prompts{$config} = 1;
244 242
245 # Check for if statements 243 # Check for if statements
246 } elsif (/^if\s+(.*\S)\s*$/) { 244 } elsif (/^if\s+(.*\S)\s*$/) {
247 my $deps = $1; 245 my $deps = $1;
248 # remove beginning and ending non 246 # remove beginning and ending non text
249 $deps =~ s/^[^a-zA-Z0-9_]*//; 247 $deps =~ s/^[^a-zA-Z0-9_]*//;
250 $deps =~ s/[^a-zA-Z0-9_]*$//; 248 $deps =~ s/[^a-zA-Z0-9_]*$//;
251 249
252 my @deps = split /[^a-zA-Z0-9_]+/, 250 my @deps = split /[^a-zA-Z0-9_]+/, $deps;
253 251
254 $ifdeps[$iflevel++] = join ':', @d 252 $ifdeps[$iflevel++] = join ':', @deps;
255 253
256 } elsif (/^endif/) { 254 } elsif (/^endif/) {
257 255
258 $iflevel-- if ($iflevel); 256 $iflevel-- if ($iflevel);
259 257
260 # stop on "help" and keywords that end 258 # stop on "help" and keywords that end a menu entry
261 } elsif (/^\s*(---)?help(---)?\s*$/ || 259 } elsif (/^\s*(---)?help(---)?\s*$/ || /^(comment|choice|menu)\b/) {
262 $state = "NONE"; 260 $state = "NONE";
263 } 261 }
264 } 262 }
265 close($kinfile); 263 close($kinfile);
266 } 264 }
267 265
268 if ($kconfig) { 266 if ($kconfig) {
269 read_kconfig($kconfig); 267 read_kconfig($kconfig);
270 } 268 }
271 269
272 # Makefiles can use variables to define their 270 # Makefiles can use variables to define their dependencies
273 sub convert_vars { 271 sub convert_vars {
274 my ($line, %vars) = @_; 272 my ($line, %vars) = @_;
275 273
276 my $process = ""; 274 my $process = "";
277 275
278 while ($line =~ s/^(.*?)(\$\((.*?)\))//) { 276 while ($line =~ s/^(.*?)(\$\((.*?)\))//) {
279 my $start = $1; 277 my $start = $1;
280 my $variable = $2; 278 my $variable = $2;
281 my $var = $3; 279 my $var = $3;
282 280
283 if (defined($vars{$var})) { 281 if (defined($vars{$var})) {
284 $process .= $start . $vars{$var}; 282 $process .= $start . $vars{$var};
285 } else { 283 } else {
286 $process .= $start . $variable; 284 $process .= $start . $variable;
287 } 285 }
288 } 286 }
289 287
290 $process .= $line; 288 $process .= $line;
291 289
292 return $process; 290 return $process;
293 } 291 }
294 292
295 # Read all Makefiles to map the configs to the 293 # Read all Makefiles to map the configs to the objects
296 foreach my $makefile (@makefiles) { 294 foreach my $makefile (@makefiles) {
297 295
298 my $line = ""; 296 my $line = "";
299 my %make_vars; 297 my %make_vars;
300 298
301 open(my $infile, '<', $makefile) || die "C 299 open(my $infile, '<', $makefile) || die "Can't open $makefile";
302 while (<$infile>) { 300 while (<$infile>) {
303 # if this line ends with a backslash, 301 # if this line ends with a backslash, continue
304 chomp; 302 chomp;
305 if (/^(.*)\\$/) { 303 if (/^(.*)\\$/) {
306 $line .= $1; 304 $line .= $1;
307 next; 305 next;
308 } 306 }
309 307
310 $line .= $_; 308 $line .= $_;
311 $_ = $line; 309 $_ = $line;
312 $line = ""; 310 $line = "";
313 311
314 my $objs; 312 my $objs;
315 313
316 # Convert variables in a line (could d 314 # Convert variables in a line (could define configs)
317 $_ = convert_vars($_, %make_vars); 315 $_ = convert_vars($_, %make_vars);
318 316
319 # collect objects after obj-$(CONFIG_F 317 # collect objects after obj-$(CONFIG_FOO_BAR)
320 if (/obj-\$[({](CONFIG_[^})]*)[)}]\s*[ !! 318 if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
321 $var = $1; 319 $var = $1;
322 $objs = $2; 320 $objs = $2;
323 321
324 # check if variables are set 322 # check if variables are set
325 } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) 323 } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
326 $make_vars{$1} = $2; 324 $make_vars{$1} = $2;
327 } 325 }
328 if (defined($objs)) { 326 if (defined($objs)) {
329 foreach my $obj (split /\s+/,$objs 327 foreach my $obj (split /\s+/,$objs) {
330 $obj =~ s/-/_/g; 328 $obj =~ s/-/_/g;
331 if ($obj =~ /(.*)\.o$/) { 329 if ($obj =~ /(.*)\.o$/) {
332 # Objects may be enabled b 330 # Objects may be enabled by more than one config.
333 # Store configs in an arra 331 # Store configs in an array.
334 my @arr; 332 my @arr;
335 333
336 if (defined($objects{$1})) 334 if (defined($objects{$1})) {
337 @arr = @{$objects{$1}} 335 @arr = @{$objects{$1}};
338 } 336 }
339 337
340 $arr[$#arr+1] = $var; 338 $arr[$#arr+1] = $var;
341 339
342 # The objects have a hash 340 # The objects have a hash mapping to a reference
343 # of an array of configs. 341 # of an array of configs.
344 $objects{$1} = \@arr; 342 $objects{$1} = \@arr;
345 } 343 }
346 } 344 }
347 } 345 }
348 } 346 }
349 close($infile); 347 close($infile);
350 } 348 }
351 349
352 my %modules; 350 my %modules;
353 my $linfile; 351 my $linfile;
354 352
355 if (defined($lsmod_file)) { 353 if (defined($lsmod_file)) {
356 if ( ! -f $lsmod_file) { 354 if ( ! -f $lsmod_file) {
357 if ( -f $ENV{'objtree'}."/".$lsmod_fil 355 if ( -f $ENV{'objtree'}."/".$lsmod_file) {
358 $lsmod_file = $ENV{'objtree'}."/". 356 $lsmod_file = $ENV{'objtree'}."/".$lsmod_file;
359 } else { 357 } else {
360 die "$lsmod_file not found"; 358 die "$lsmod_file not found";
361 } 359 }
362 } 360 }
363 361
364 my $otype = ( -x $lsmod_file) ? '-|' : '<' 362 my $otype = ( -x $lsmod_file) ? '-|' : '<';
365 open($linfile, $otype, $lsmod_file); 363 open($linfile, $otype, $lsmod_file);
366 364
367 } else { 365 } else {
368 366
369 # see what modules are loaded on this syst 367 # see what modules are loaded on this system
370 my $lsmod; 368 my $lsmod;
371 369
372 foreach my $dir ( ("/sbin", "/bin", "/usr/ 370 foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
373 if ( -x "$dir/lsmod" ) { 371 if ( -x "$dir/lsmod" ) {
374 $lsmod = "$dir/lsmod"; 372 $lsmod = "$dir/lsmod";
375 last; 373 last;
376 } 374 }
377 } 375 }
378 if (!defined($lsmod)) { 376 if (!defined($lsmod)) {
379 # try just the path 377 # try just the path
380 $lsmod = "lsmod"; 378 $lsmod = "lsmod";
381 } 379 }
382 380
383 open($linfile, '-|', $lsmod) || die "Can n 381 open($linfile, '-|', $lsmod) || die "Can not call lsmod with $lsmod";
384 } 382 }
385 383
386 while (<$linfile>) { 384 while (<$linfile>) {
387 next if (/^Module/); # Skip the first 385 next if (/^Module/); # Skip the first line.
388 if (/^(\S+)/) { 386 if (/^(\S+)/) {
389 $modules{$1} = 1; 387 $modules{$1} = 1;
390 } 388 }
391 } 389 }
392 close ($linfile); 390 close ($linfile);
393 391
394 # add to the configs hash all configs that are 392 # add to the configs hash all configs that are needed to enable
395 # a loaded module. This is a direct obj-${CONF 393 # a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o
396 # where we know we need bar.o so we add FOO to 394 # where we know we need bar.o so we add FOO to the list.
397 my %configs; 395 my %configs;
398 foreach my $module (keys(%modules)) { 396 foreach my $module (keys(%modules)) {
399 if (defined($objects{$module})) { 397 if (defined($objects{$module})) {
400 my @arr = @{$objects{$module}}; 398 my @arr = @{$objects{$module}};
401 foreach my $conf (@arr) { 399 foreach my $conf (@arr) {
402 $configs{$conf} = $module; 400 $configs{$conf} = $module;
403 dprint "$conf added by direct ($mo 401 dprint "$conf added by direct ($module)\n";
404 if ($debugprint) { 402 if ($debugprint) {
405 my $c=$conf; 403 my $c=$conf;
406 $c =~ s/^CONFIG_//; 404 $c =~ s/^CONFIG_//;
407 if (defined($depends{$c})) { 405 if (defined($depends{$c})) {
408 dprint " deps = $depends{$ 406 dprint " deps = $depends{$c}\n";
409 } else { 407 } else {
410 dprint " no deps\n"; 408 dprint " no deps\n";
411 } 409 }
412 } 410 }
413 } 411 }
414 } else { 412 } else {
415 # Most likely, someone has a custom (b 413 # Most likely, someone has a custom (binary?) module loaded.
416 print STDERR "$module config not found 414 print STDERR "$module config not found!!\n";
417 } 415 }
418 } 416 }
419 417
420 # Read the current config, and see what is ena 418 # Read the current config, and see what is enabled. We want to
421 # ignore configs that we would not enable anyw 419 # ignore configs that we would not enable anyway.
422 420
423 my %orig_configs; 421 my %orig_configs;
424 my $valid = "A-Za-z_0-9"; 422 my $valid = "A-Za-z_0-9";
425 423
426 foreach my $line (@config_file) { 424 foreach my $line (@config_file) {
427 $_ = $line; 425 $_ = $line;
428 426
429 if (/(CONFIG_[$valid]*)=(m|y)/) { 427 if (/(CONFIG_[$valid]*)=(m|y)/) {
430 $orig_configs{$1} = $2; 428 $orig_configs{$1} = $2;
431 } 429 }
432 } 430 }
433 431
434 my $repeat = 1; 432 my $repeat = 1;
435 433
436 my $depconfig; 434 my $depconfig;
437 435
438 # 436 #
439 # Note, we do not care about operands (like: & 437 # Note, we do not care about operands (like: &&, ||, !) we want to add any
440 # config that is in the depend list of another 438 # config that is in the depend list of another config. This script does
441 # not enable configs that are not already enab 439 # not enable configs that are not already enabled. If we come across a
442 # config A that depends on !B, we can still ad 440 # config A that depends on !B, we can still add B to the list of depends
443 # to keep on. If A was on in the original conf 441 # to keep on. If A was on in the original config, B would not have been
444 # and B would not be turned on by this script. 442 # and B would not be turned on by this script.
445 # 443 #
446 sub parse_config_depends 444 sub parse_config_depends
447 { 445 {
448 my ($p) = @_; 446 my ($p) = @_;
449 447
450 while ($p =~ /[$valid]/) { 448 while ($p =~ /[$valid]/) {
451 449
452 if ($p =~ /^[^$valid]*([$valid]+)/) { 450 if ($p =~ /^[^$valid]*([$valid]+)/) {
453 my $conf = "CONFIG_" . $1; 451 my $conf = "CONFIG_" . $1;
454 452
455 $p =~ s/^[^$valid]*[$valid]+//; 453 $p =~ s/^[^$valid]*[$valid]+//;
456 454
457 # We only need to process if the d 455 # We only need to process if the depend config is a module
458 if (!defined($orig_configs{$conf}) 456 if (!defined($orig_configs{$conf}) || $orig_configs{$conf} eq "y") {
459 next; 457 next;
460 } 458 }
461 459
462 if (!defined($configs{$conf})) { 460 if (!defined($configs{$conf})) {
463 # We must make sure that this 461 # We must make sure that this config has its
464 # dependencies met. 462 # dependencies met.
465 $repeat = 1; # do again 463 $repeat = 1; # do again
466 dprint "$conf selected by depe 464 dprint "$conf selected by depend $depconfig\n";
467 $configs{$conf} = 1; 465 $configs{$conf} = 1;
468 } 466 }
469 } else { 467 } else {
470 die "this should never happen"; 468 die "this should never happen";
471 } 469 }
472 } 470 }
473 } 471 }
474 472
475 # Select is treated a bit differently than dep 473 # Select is treated a bit differently than depends. We call this
476 # when a config has no prompt and requires ano 474 # when a config has no prompt and requires another config to be
477 # selected. We use to just select all configs 475 # selected. We use to just select all configs that selected this
478 # config, but found that that can balloon into 476 # config, but found that that can balloon into enabling hundreds
479 # of configs that we do not care about. 477 # of configs that we do not care about.
480 # 478 #
481 # The idea is we look at all the configs that 479 # The idea is we look at all the configs that select it. If one
482 # is already in our list of configs to enable, 480 # is already in our list of configs to enable, then there's nothing
483 # else to do. If there isn't, we pick the firs 481 # else to do. If there isn't, we pick the first config that was
484 # enabled in the original config and use that. !! 482 # enabled in the orignal config and use that.
485 sub parse_config_selects 483 sub parse_config_selects
486 { 484 {
487 my ($config, $p) = @_; 485 my ($config, $p) = @_;
488 486
489 my $next_config; 487 my $next_config;
490 488
491 while ($p =~ /[$valid]/) { 489 while ($p =~ /[$valid]/) {
492 490
493 if ($p =~ /^[^$valid]*([$valid]+)/) { 491 if ($p =~ /^[^$valid]*([$valid]+)/) {
494 my $conf = "CONFIG_" . $1; 492 my $conf = "CONFIG_" . $1;
495 493
496 $p =~ s/^[^$valid]*[$valid]+//; 494 $p =~ s/^[^$valid]*[$valid]+//;
497 495
498 # Make sure that this config exist 496 # Make sure that this config exists in the current .config file
499 if (!defined($orig_configs{$conf}) 497 if (!defined($orig_configs{$conf})) {
500 dprint "$conf not set for $con 498 dprint "$conf not set for $config select\n";
501 next; 499 next;
502 } 500 }
503 501
504 # Check if something other than a 502 # Check if something other than a module selects this config
505 if (defined($orig_configs{$conf}) 503 if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") {
506 dprint "$conf (non module) sel 504 dprint "$conf (non module) selects config, we are good\n";
507 # we are good with this 505 # we are good with this
508 return; 506 return;
509 } 507 }
510 if (defined($configs{$conf})) { 508 if (defined($configs{$conf})) {
511 dprint "$conf selects $config 509 dprint "$conf selects $config so we are good\n";
512 # A set config selects this co 510 # A set config selects this config, we are good
513 return; 511 return;
514 } 512 }
515 # Set this config to be selected 513 # Set this config to be selected
516 if (!defined($next_config)) { 514 if (!defined($next_config)) {
517 $next_config = $conf; 515 $next_config = $conf;
518 } 516 }
519 } else { 517 } else {
520 die "this should never happen"; 518 die "this should never happen";
521 } 519 }
522 } 520 }
523 521
524 # If no possible config selected this, the 522 # If no possible config selected this, then something happened.
525 if (!defined($next_config)) { 523 if (!defined($next_config)) {
526 print STDERR "WARNING: $config is requ 524 print STDERR "WARNING: $config is required, but nothing in the\n";
527 print STDERR " current config selects 525 print STDERR " current config selects it.\n";
528 return; 526 return;
529 } 527 }
530 528
531 # If we are here, then we found no config 529 # If we are here, then we found no config that is set and
532 # selects this config. Repeat. 530 # selects this config. Repeat.
533 $repeat = 1; 531 $repeat = 1;
534 # Make this config need to be selected 532 # Make this config need to be selected
535 $configs{$next_config} = 1; 533 $configs{$next_config} = 1;
536 dprint "$next_config selected by select $c 534 dprint "$next_config selected by select $config\n";
537 } 535 }
538 536
539 my %process_selects; 537 my %process_selects;
540 538
541 # loop through all configs, select their depen 539 # loop through all configs, select their dependencies.
542 sub loop_depend { 540 sub loop_depend {
543 $repeat = 1; 541 $repeat = 1;
544 542
545 while ($repeat) { 543 while ($repeat) {
546 $repeat = 0; 544 $repeat = 0;
547 545
548 forloop: 546 forloop:
549 foreach my $config (keys %configs) { 547 foreach my $config (keys %configs) {
550 548
551 # If this config is not a module, 549 # If this config is not a module, we do not need to process it
552 if (defined($orig_configs{$config} 550 if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") {
553 next forloop; 551 next forloop;
554 } 552 }
555 553
556 $config =~ s/^CONFIG_//; 554 $config =~ s/^CONFIG_//;
557 $depconfig = $config; 555 $depconfig = $config;
558 556
559 if (defined($depends{$config})) { 557 if (defined($depends{$config})) {
560 # This config has dependencies 558 # This config has dependencies. Make sure they are also included
561 parse_config_depends $depends{ 559 parse_config_depends $depends{$config};
562 } 560 }
563 561
564 # If the config has no prompt, the 562 # If the config has no prompt, then we need to check if a config
565 # that is enabled selected it. Or 563 # that is enabled selected it. Or if we need to enable one.
566 if (!defined($prompts{$config}) && 564 if (!defined($prompts{$config}) && defined($selects{$config})) {
567 $process_selects{$config} = 1; 565 $process_selects{$config} = 1;
568 } 566 }
569 } 567 }
570 } 568 }
571 } 569 }
572 570
573 sub loop_select { 571 sub loop_select {
574 572
575 foreach my $config (keys %process_selects) 573 foreach my $config (keys %process_selects) {
576 $config =~ s/^CONFIG_//; 574 $config =~ s/^CONFIG_//;
577 575
578 dprint "Process select $config\n"; 576 dprint "Process select $config\n";
579 577
580 # config has no prompt and must be sel 578 # config has no prompt and must be selected.
581 parse_config_selects $config, $selects 579 parse_config_selects $config, $selects{$config};
582 } 580 }
583 } 581 }
584 582
585 while ($repeat) { 583 while ($repeat) {
586 # Get the first set of configs and their d 584 # Get the first set of configs and their dependencies.
587 loop_depend; 585 loop_depend;
588 586
589 $repeat = 0; 587 $repeat = 0;
590 588
591 # Now we need to see if we have to check s 589 # Now we need to see if we have to check selects;
592 loop_select; 590 loop_select;
593 } 591 }
594 592
595 my %setconfigs; 593 my %setconfigs;
596 my @preserved_kconfigs; <<
597 if (defined($ENV{'LMC_KEEP'})) { <<
598 @preserved_kconfigs = split(/:/,$ENV{L <<
599 } <<
600 <<
601 sub in_preserved_kconfigs { <<
602 my $kconfig = $config2kfile{$_[0]}; <<
603 if (!defined($kconfig)) { <<
604 return 0; <<
605 } <<
606 foreach my $excl (@preserved_kconfigs) { <<
607 if($kconfig =~ /^$excl/) { <<
608 return 1; <<
609 } <<
610 } <<
611 return 0; <<
612 } <<
613 594
614 # Finally, read the .config file and turn off 595 # Finally, read the .config file and turn off any module enabled that
615 # we could not find a reason to keep enabled. 596 # we could not find a reason to keep enabled.
616 foreach my $line (@config_file) { 597 foreach my $line (@config_file) {
617 $_ = $line; 598 $_ = $line;
618 599
619 if (/CONFIG_IKCONFIG/) { 600 if (/CONFIG_IKCONFIG/) {
620 if (/# CONFIG_IKCONFIG is not set/) { 601 if (/# CONFIG_IKCONFIG is not set/) {
621 # enable IKCONFIG at least as a mo 602 # enable IKCONFIG at least as a module
622 print "CONFIG_IKCONFIG=m\n"; 603 print "CONFIG_IKCONFIG=m\n";
623 # don't ask about PROC 604 # don't ask about PROC
624 print "# CONFIG_IKCONFIG_PROC is n 605 print "# CONFIG_IKCONFIG_PROC is not set\n";
625 } else { 606 } else {
626 print; 607 print;
627 } 608 }
628 next; 609 next;
629 } 610 }
630 611
631 if (/CONFIG_MODULE_SIG_KEY="(.+)"/) { 612 if (/CONFIG_MODULE_SIG_KEY="(.+)"/) {
632 my $orig_cert = $1; !! 613 my $orig_cert = $1;
633 my $default_cert = "certs/signing_key. !! 614 my $default_cert = "certs/signing_key.pem";
634 615
635 # Check that the logic in this script !! 616 # Check that the logic in this script still matches the one in Kconfig
636 if (!defined($depends{"MODULE_SIG_KEY" !! 617 if (!defined($depends{"MODULE_SIG_KEY"}) ||
637 $depends{"MODULE_SIG_KEY"} !~ /"\Q !! 618 $depends{"MODULE_SIG_KEY"} !~ /"\Q$default_cert\E"/) {
638 print STDERR "WARNING: MODULE_SIG_ !! 619 print STDERR "WARNING: MODULE_SIG_KEY assertion failure, ",
639 "update needed to ", __FILE__, !! 620 "update needed to ", __FILE__, " line ", __LINE__, "\n";
640 print; !! 621 print;
641 } elsif ($orig_cert ne $default_cert & !! 622 } elsif ($orig_cert ne $default_cert && ! -f $orig_cert) {
642 print STDERR "Module signature ver !! 623 print STDERR "Module signature verification enabled but ",
643 "module signing key \"$orig_ce !! 624 "module signing key \"$orig_cert\" not found. Resetting ",
644 "signing key to default value. !! 625 "signing key to default value.\n";
645 print "CONFIG_MODULE_SIG_KEY=\"$de !! 626 print "CONFIG_MODULE_SIG_KEY=\"$default_cert\"\n";
646 } else { !! 627 } else {
647 print; !! 628 print;
648 } !! 629 }
649 next; !! 630 next;
650 } 631 }
651 632
652 if (/CONFIG_SYSTEM_TRUSTED_KEYS="(.+)"/) { 633 if (/CONFIG_SYSTEM_TRUSTED_KEYS="(.+)"/) {
653 my $orig_keys = $1; !! 634 my $orig_keys = $1;
654 635
655 if (! -f $orig_keys) { !! 636 if (! -f $orig_keys) {
656 print STDERR "System keyring enabl !! 637 print STDERR "System keyring enabled but keys \"$orig_keys\" ",
657 "not found. Resetting keys to !! 638 "not found. Resetting keys to default value.\n";
658 print "CONFIG_SYSTEM_TRUSTED_KEYS= !! 639 print "CONFIG_SYSTEM_TRUSTED_KEYS=\"\"\n";
659 } else { !! 640 } else {
660 print; !! 641 print;
661 } !! 642 }
662 next; !! 643 next;
663 } 644 }
664 645
665 if (/^(CONFIG.*)=(m|y)/) { 646 if (/^(CONFIG.*)=(m|y)/) {
666 if (in_preserved_kconfigs($1)) { <<
667 dprint "Preserve config $1"; <<
668 print; <<
669 next; <<
670 } <<
671 if (defined($configs{$1})) { 647 if (defined($configs{$1})) {
672 if ($localyesconfig) { 648 if ($localyesconfig) {
673 $setconfigs{$1} = 'y'; !! 649 $setconfigs{$1} = 'y';
674 print "$1=y\n"; 650 print "$1=y\n";
675 next; 651 next;
676 } else { 652 } else {
677 $setconfigs{$1} = $2; !! 653 $setconfigs{$1} = $2;
678 } 654 }
679 } elsif ($2 eq "m") { 655 } elsif ($2 eq "m") {
680 print "# $1 is not set\n"; 656 print "# $1 is not set\n";
681 next; 657 next;
682 } 658 }
683 } 659 }
684 print; 660 print;
685 } 661 }
686 662
687 # Integrity check, make sure all modules that 663 # Integrity check, make sure all modules that we want enabled do
688 # indeed have their configs set. 664 # indeed have their configs set.
689 loop: 665 loop:
690 foreach my $module (keys(%modules)) { 666 foreach my $module (keys(%modules)) {
691 if (defined($objects{$module})) { 667 if (defined($objects{$module})) {
692 my @arr = @{$objects{$module}}; 668 my @arr = @{$objects{$module}};
693 foreach my $conf (@arr) { 669 foreach my $conf (@arr) {
694 if (defined($setconfigs{$conf})) { 670 if (defined($setconfigs{$conf})) {
695 next loop; 671 next loop;
696 } 672 }
697 } 673 }
698 print STDERR "module $module did not h 674 print STDERR "module $module did not have configs";
699 foreach my $conf (@arr) { 675 foreach my $conf (@arr) {
700 print STDERR " " , $conf; 676 print STDERR " " , $conf;
701 } 677 }
702 print STDERR "\n"; 678 print STDERR "\n";
703 } 679 }
704 } 680 }
705 <<
706 # vim: softtabstop=4 <<
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