tools/fw: Fix set-but-unused gcc47 warning in generated C file
[dragonfly.git] / sys / tools / fw_stub.awk
1 #!/usr/bin/awk -f
2
3 #-
4 # Copyright (c) 2006 Max Laier.
5 # All rights reserved.
6 #
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
9 # are met:
10 # 1. Redistributions of source code must retain the above copyright
11 #    notice, this list of conditions and the following disclaimer.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 #    notice, this list of conditions and the following disclaimer in the
14 #    documentation and/or other materials provided with the distribution.
15 #
16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS `AS IS'' AND
17 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 # SUCH DAMAGE.
27 #
28 # $FreeBSD: src/sys/tools/fw_stub.awk,v 1.6.10.2 2009/11/02 09:47:15 fjoe Exp $
29
30 #
31 # Script to generate module .c file from a list of firmware images
32 #
33
34 function usage ()
35 {
36         print "usage: fw_stub <firmware:name>* [-l name] [-m modname] [-c outfile]";
37         exit 1;
38 }
39
40 #   These are just for convenience ...
41 function printc(s)
42 {
43         if (opt_c)
44                 print s > ctmpfilename;
45         else
46                 print s > "/dev/stdout";
47 }
48
49 BEGIN {
50
51 #
52 #   Process the command line.
53 #
54
55 num_files = 0;
56
57 for (i = 1; i < ARGC; i++) {
58         if (ARGV[i] ~ /^-/) {
59                 #
60                 #   awk doesn't have getopt(), so we have to do it ourselves.
61                 #   This is a bit clumsy, but it works.
62                 #
63                 for (j = 2; j <= length(ARGV[i]); j++) {
64                         o = substr(ARGV[i], j, 1);
65                         if (o == "c") {
66                                 if (length(ARGV[i]) > j) {
67                                         opt_c = substr(ARGV[i], j + 1);
68                                         break;
69                                 }
70                                 else {
71                                         if (++i < ARGC)
72                                                 opt_c = ARGV[i];
73                                         else
74                                                 usage();
75                                 }
76                         } else if (o == "m") {
77                                 if (length(ARGV[i]) > j) {
78                                         opt_m = substr(ARGV[i], j + 1);
79                                         break;
80                                 }
81                                 else {
82                                         if (++i < ARGC)
83                                                 opt_m = ARGV[i];
84                                         else
85                                                 usage();
86                                 }
87                         } else if (o == "l") {
88                                 if (length(ARGV[i]) > j) {
89                                         opt_l = substr(ARGV[i], j + 1);
90                                         break;
91                                 }
92                                 else {
93                                         if (++i < ARGC)
94                                                 opt_l = ARGV[i];
95                                         else
96                                                 usage();
97                                 }
98                         } else
99                                 usage();
100                 }
101         } else {
102                 split(ARGV[i], curr, ":");
103                 filenames[num_files] = curr[1];
104                 if (length(curr[2]) > 0)
105                         shortnames[num_files] = curr[2];
106                 else
107                         shortnames[num_files] = curr[1];
108                 if (length(curr[3]) > 0)
109                         versions[num_files] = int(curr[3]);
110                 else
111                         versions[num_files] = 0;
112                 num_files++;
113         }
114 }
115
116 if (!num_files || !opt_m)
117         usage();
118
119 cfilename = opt_c;
120 ctmpfilename = cfilename ".tmp";
121 modname = opt_m;
122 gsub(/[-\.]/, "_", modname);
123
124 printc("#include <sys/param.h>\
125 #include <sys/errno.h>\
126 #include <sys/kernel.h>\
127 #include <sys/module.h>\
128 #include <sys/linker.h>\
129 #include <sys/firmware.h>\
130 #include <sys/systm.h>\n");
131
132 if (opt_l) {
133         printc("static long " opt_l "_license_ack = 0;");
134 }
135
136 for (file_i = 0; file_i < num_files; file_i++) {
137         symb = filenames[file_i];
138         # '-', '.' and '/' are converted to '_' by ld/objcopy
139         gsub(/-|\.|\//, "_", symb);
140         printc("extern char _binary_" symb "_start[], _binary_" symb "_end[];");
141 }
142
143 printc("\nstatic int\n"\
144 modname "_fw_modevent(module_t mod, int type, void *unused)\
145 {\
146         const struct firmware *fp;");
147
148 if (num_files > 1)
149         printc("\tconst struct firmware *parent;");
150
151 printc("\tint error;\
152         switch (type) {\
153         case MOD_LOAD:\n");
154
155 if (opt_l) {
156                 printc("\
157                 TUNABLE_LONG_FETCH(\"legal." opt_l ".license_ack\", &" opt_l "_license_ack);\
158                 if (!" opt_l "_license_ack) {\
159                         kprintf(\"" opt_m ": You need to read the LICENSE file in /usr/share/doc/legal/" opt_l "/.\\n\");\
160                         kprintf(\"" opt_m ": If you agree with the license, set legal." opt_l ".license_ack=1 in /boot/loader.conf.\\n\");\
161                         return(EPERM);\
162                 }\n");
163 }
164
165 for (file_i = 0; file_i < num_files; file_i++) {
166         short = shortnames[file_i];
167         symb = filenames[file_i];
168         version = versions[file_i];
169         # '-', '.' and '/' are converted to '_' by ld/objcopy
170         gsub(/-|\.|\//, "_", symb);
171
172         reg = "\t\tfp = ";
173         reg = reg "firmware_register(\"" short "\", _binary_" symb "_start , ";
174         reg = reg "(size_t)(_binary_" symb "_end - _binary_" symb "_start), ";
175         reg = reg version ", ";
176
177         if (file_i == 0)
178                 reg = reg "NULL);";
179         else
180                 reg = reg "parent);";
181
182         printc(reg);
183
184         printc("\t\tif (fp == NULL)");
185         printc("\t\t\tgoto fail_" file_i ";");
186         if (file_i == 0 && num_files > 1)
187                 printc("\t\tparent = fp;");
188 }
189
190 printc("\t\treturn (0);");
191
192 for (file_i = num_files - 1; file_i > 0; file_i--) {
193         printc("fail_" file_i ":")
194         printc("\t\t(void)firmware_unregister(\"" shortnames[file_i - 1] "\");");
195 }
196
197 printc("\tfail_0:");
198 printc("\t\treturn (ENXIO);");
199
200 printc("\tcase MOD_UNLOAD:");
201
202 for (file_i = 1; file_i < num_files; file_i++) {
203         printc("\t\terror = firmware_unregister(\"" shortnames[file_i] "\");");
204         printc("\t\tif (error)");
205         printc("\t\t\treturn (error);");
206 }
207
208 printc("\t\terror = firmware_unregister(\"" shortnames[0] "\");");
209
210 printc("\t\treturn (error);\
211         }\
212         return (EINVAL);\
213 }\
214 \
215 static moduledata_t " modname "_fw_mod = {\
216         \"" modname "_fw\",\
217         " modname "_fw_modevent,\
218         0\
219 };\
220 DECLARE_MODULE(" modname "_fw, " modname "_fw_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\
221 MODULE_VERSION(" modname "_fw, 1);\
222 MODULE_DEPEND(" modname "_fw, firmware, 1, 1, 1);\
223 ");
224
225 if (opt_c)
226         if ((rc = system("mv -f " ctmpfilename " " cfilename))) {
227                 print "'mv -f " ctmpfilename " " cfilename "' failed: " rc \
228                     > "/dev/stderr";
229                 exit 1;
230         }
231
232 exit 0;
233
234 }