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Use a template assembly file for firmware object files.
[FreeBSD/FreeBSD.git] / sys / tools / fw_stub.awk
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 # $FreeBSD$
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 # Avoid a literal generated file tag here.
127 generated = "@" "generated";
128 printc("/*\
129  * Automatically " generated " by:\
130  * $FreeBSD$\
131  */");
132 printc("#include <sys/param.h>");
133 printc("#include <sys/errno.h>");
134 printc("#include <sys/kernel.h>");
135 printc("#include <sys/module.h>");
136 printc("#include <sys/linker.h>");
137 printc("#include <sys/firmware.h>");
138 printc("#include <sys/systm.h>\n");
139
140 if (opt_l) {
141         printc("static long " opt_l "_license_ack = 0;");
142 }
143
144 for (file_i = 0; file_i < num_files; file_i++) {
145         symb = filenames[file_i];
146         # '-', '.' and '/' are converted to '_'
147         gsub(/-|\.|\//, "_", symb);
148         printc("extern char _binary_" symb "_start[], _binary_" symb "_end[];");
149 }
150
151 printc("\nstatic int\n"\
152 modname "_fw_modevent(module_t mod, int type, void *unused)\
153 {\
154         const struct firmware *fp, *parent;\
155         int error;\
156         switch (type) {\
157         case MOD_LOAD:\n");
158
159 if (opt_l) {
160                 printc("\
161                 TUNABLE_LONG_FETCH(\"legal." opt_l ".license_ack\", &" opt_l "_license_ack);\
162                 if (!" opt_l "_license_ack) {\
163                         printf(\"" opt_m ": You need to read the LICENSE file in /usr/share/doc/legal/" opt_l ".LICENSE.\\n\");\
164                         printf(\"" opt_m ": If you agree with the license, set legal." opt_l ".license_ack=1 in /boot/loader.conf.\\n\");\
165                         return(EPERM);\
166                 }\n");
167 }
168
169 for (file_i = 0; file_i < num_files; file_i++) {
170         short = shortnames[file_i];
171         symb = filenames[file_i];
172         version = versions[file_i];
173         # '-', '.' and '/' are converted to '_'
174         gsub(/-|\.|\//, "_", symb);
175
176         reg = "\t\tfp = ";
177         reg = reg "firmware_register(\"" short "\", _binary_" symb "_start , ";
178         reg = reg "(size_t)(_binary_" symb "_end - _binary_" symb "_start), ";
179         reg = reg version ", ";
180
181         if (file_i == 0)
182                 reg = reg "NULL);";
183         else
184                 reg = reg "parent);";
185
186         printc(reg);
187
188         printc("\t\tif (fp == NULL)");
189         printc("\t\t\tgoto fail_" file_i ";");
190         if (file_i == 0)
191                 printc("\t\tparent = fp;");
192 }
193
194 printc("\t\treturn (0);");
195
196 for (file_i = num_files - 1; file_i > 0; file_i--) {
197         printc("fail_" file_i ":")
198         printc("\t\t(void)firmware_unregister(\"" shortnames[file_i - 1] "\");");
199 }
200
201 printc("\tfail_0:");
202 printc("\t\treturn (ENXIO);");
203
204 printc("\tcase MOD_UNLOAD:");
205
206 for (file_i = 1; file_i < num_files; file_i++) {
207         printc("\t\terror = firmware_unregister(\"" shortnames[file_i] "\");");
208         printc("\t\tif (error)");
209         printc("\t\t\treturn (error);");
210 }
211
212 printc("\t\terror = firmware_unregister(\"" shortnames[0] "\");");
213
214 printc("\t\treturn (error);\
215         }\
216         return (EINVAL);\
217 }\
218 \
219 static moduledata_t " modname "_fw_mod = {\
220         \"" modname "_fw\",\
221         " modname "_fw_modevent,\
222         0\
223 };\
224 DECLARE_MODULE(" modname "_fw, " modname "_fw_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\
225 MODULE_VERSION(" modname "_fw, 1);\
226 MODULE_DEPEND(" modname "_fw, firmware, 1, 1, 1);\
227 ");
228
229 if (opt_c)
230         if ((rc = system("mv -f " ctmpfilename " " cfilename))) {
231                 print "'mv -f " ctmpfilename " " cfilename "' failed: " rc \
232                     > "/dev/stderr";
233                 exit 1;
234         }
235
236 exit 0;
237
238 }