The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/tools/fw_stub.awk

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    1 #!/usr/bin/awk -f
    2 
    3 #-
    4 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    5 #
    6 # Copyright (c) 2006 Max Laier.
    7 # All rights reserved.
    8 #
    9 # Redistribution and use in source and binary forms, with or without
   10 # modification, are permitted provided that the following conditions
   11 # are met:
   12 # 1. Redistributions of source code must retain the above copyright
   13 #    notice, this list of conditions and the following disclaimer.
   14 # 2. Redistributions in binary form must reproduce the above copyright
   15 #    notice, this list of conditions and the following disclaimer in the
   16 #    documentation and/or other materials provided with the distribution.
   17 #
   18 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS `AS IS'' AND
   19 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28 # SUCH DAMAGE.
   29 #
   30 # $FreeBSD: head/sys/tools/fw_stub.awk 326272 2017-11-27 15:23:17Z pfg $
   31 
   32 #
   33 # Script to generate module .c file from a list of firmware images
   34 #
   35 
   36 function usage ()
   37 {
   38         print "usage: fw_stub <firmware:name>* [-l name] [-m modname] [-c outfile]";
   39         exit 1;
   40 }
   41 
   42 #   These are just for convenience ...
   43 function printc(s)
   44 {
   45         if (opt_c)
   46                 print s > ctmpfilename;
   47         else
   48                 print s > "/dev/stdout";
   49 }
   50 
   51 BEGIN {
   52 
   53 #
   54 #   Process the command line.
   55 #
   56 
   57 num_files = 0;
   58 
   59 for (i = 1; i < ARGC; i++) {
   60         if (ARGV[i] ~ /^-/) {
   61                 #
   62                 #   awk doesn't have getopt(), so we have to do it ourselves.
   63                 #   This is a bit clumsy, but it works.
   64                 #
   65                 for (j = 2; j <= length(ARGV[i]); j++) {
   66                         o = substr(ARGV[i], j, 1);
   67                         if (o == "c") {
   68                                 if (length(ARGV[i]) > j) {
   69                                         opt_c = substr(ARGV[i], j + 1);
   70                                         break;
   71                                 }
   72                                 else {
   73                                         if (++i < ARGC)
   74                                                 opt_c = ARGV[i];
   75                                         else
   76                                                 usage();
   77                                 }
   78                         } else if (o == "m") {
   79                                 if (length(ARGV[i]) > j) {
   80                                         opt_m = substr(ARGV[i], j + 1);
   81                                         break;
   82                                 }
   83                                 else {
   84                                         if (++i < ARGC)
   85                                                 opt_m = ARGV[i];
   86                                         else
   87                                                 usage();
   88                                 }
   89                         } else if (o == "l") {
   90                                 if (length(ARGV[i]) > j) {
   91                                         opt_l = substr(ARGV[i], j + 1);
   92                                         break;
   93                                 }
   94                                 else {
   95                                         if (++i < ARGC)
   96                                                 opt_l = ARGV[i];
   97                                         else
   98                                                 usage();
   99                                 }
  100                         } else
  101                                 usage();
  102                 }
  103         } else {
  104                 split(ARGV[i], curr, ":");
  105                 filenames[num_files] = curr[1];
  106                 if (length(curr[2]) > 0)
  107                         shortnames[num_files] = curr[2];
  108                 else
  109                         shortnames[num_files] = curr[1];
  110                 if (length(curr[3]) > 0)
  111                         versions[num_files] = int(curr[3]);
  112                 else
  113                         versions[num_files] = 0;
  114                 num_files++;
  115         }
  116 }
  117 
  118 if (!num_files || !opt_m)
  119         usage();
  120 
  121 cfilename = opt_c;
  122 ctmpfilename = cfilename ".tmp";
  123 modname = opt_m;
  124 gsub(/[-\.]/, "_", modname);
  125 
  126 printc("/*\
  127  * Automatically generated by:\
  128  * $FreeBSD: head/sys/tools/fw_stub.awk 326272 2017-11-27 15:23:17Z pfg $\
  129  */");
  130 printc("#include <sys/param.h>");
  131 printc("#include <sys/errno.h>");
  132 printc("#include <sys/kernel.h>");
  133 printc("#include <sys/module.h>");
  134 printc("#include <sys/linker.h>");
  135 printc("#include <sys/firmware.h>");
  136 printc("#include <sys/systm.h>\n");
  137 
  138 if (opt_l) {
  139         printc("static long " opt_l "_license_ack = 0;");
  140 }
  141 
  142 for (file_i = 0; file_i < num_files; file_i++) {
  143         symb = filenames[file_i];
  144         # '-', '.' and '/' are converted to '_' by ld/objcopy
  145         gsub(/-|\.|\//, "_", symb);
  146         printc("extern char _binary_" symb "_start[], _binary_" symb "_end[];");
  147 }
  148 
  149 printc("\nstatic int\n"\
  150 modname "_fw_modevent(module_t mod, int type, void *unused)\
  151 {\
  152         const struct firmware *fp, *parent;\
  153         int error;\
  154         switch (type) {\
  155         case MOD_LOAD:\n");
  156 
  157 if (opt_l) {
  158                 printc("\
  159                 TUNABLE_LONG_FETCH(\"legal." opt_l ".license_ack\", &" opt_l "_license_ack);\
  160                 if (!" opt_l "_license_ack) {\
  161                         printf(\"" opt_m ": You need to read the LICENSE file in /usr/share/doc/legal/" opt_l ".LICENSE.\\n\");\
  162                         printf(\"" opt_m ": If you agree with the license, set legal." opt_l ".license_ack=1 in /boot/loader.conf.\\n\");\
  163                         return(EPERM);\
  164                 }\n");
  165 }
  166 
  167 for (file_i = 0; file_i < num_files; file_i++) {
  168         short = shortnames[file_i];
  169         symb = filenames[file_i];
  170         version = versions[file_i];
  171         # '-', '.' and '/' are converted to '_' by ld/objcopy
  172         gsub(/-|\.|\//, "_", symb);
  173 
  174         reg = "\t\tfp = ";
  175         reg = reg "firmware_register(\"" short "\", _binary_" symb "_start , ";
  176         reg = reg "(size_t)(_binary_" symb "_end - _binary_" symb "_start), ";
  177         reg = reg version ", ";
  178 
  179         if (file_i == 0)
  180                 reg = reg "NULL);";
  181         else
  182                 reg = reg "parent);";
  183 
  184         printc(reg);
  185 
  186         printc("\t\tif (fp == NULL)");
  187         printc("\t\t\tgoto fail_" file_i ";");
  188         if (file_i == 0)
  189                 printc("\t\tparent = fp;");
  190 }
  191 
  192 printc("\t\treturn (0);");
  193 
  194 for (file_i = num_files - 1; file_i > 0; file_i--) {
  195         printc("fail_" file_i ":")
  196         printc("\t\t(void)firmware_unregister(\"" shortnames[file_i - 1] "\");");
  197 }
  198 
  199 printc("\tfail_0:");
  200 printc("\t\treturn (ENXIO);");
  201 
  202 printc("\tcase MOD_UNLOAD:");
  203 
  204 for (file_i = 1; file_i < num_files; file_i++) {
  205         printc("\t\terror = firmware_unregister(\"" shortnames[file_i] "\");");
  206         printc("\t\tif (error)");
  207         printc("\t\t\treturn (error);");
  208 }
  209 
  210 printc("\t\terror = firmware_unregister(\"" shortnames[0] "\");");
  211 
  212 printc("\t\treturn (error);\
  213         }\
  214         return (EINVAL);\
  215 }\
  216 \
  217 static moduledata_t " modname "_fw_mod = {\
  218         \"" modname "_fw\",\
  219         " modname "_fw_modevent,\
  220         0\
  221 };\
  222 DECLARE_MODULE(" modname "_fw, " modname "_fw_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\
  223 MODULE_VERSION(" modname "_fw, 1);\
  224 MODULE_DEPEND(" modname "_fw, firmware, 1, 1, 1);\
  225 ");
  226 
  227 if (opt_c)
  228         if ((rc = system("mv -f " ctmpfilename " " cfilename))) {
  229                 print "'mv -f " ctmpfilename " " cfilename "' failed: " rc \
  230                     > "/dev/stderr";
  231                 exit 1;
  232         }
  233 
  234 exit 0;
  235 
  236 }

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