1 #! /bin/sh -
2 # $NetBSD: makesyscalls.sh,v 1.55 2003/09/30 20:34:28 christos Exp $
3 #
4 # Copyright (c) 1994, 1996, 2000 Christopher G. Demetriou
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 # 3. All advertising materials mentioning features or use of this software
16 # must display the following acknowledgement:
17 # This product includes software developed for the NetBSD Project
18 # by Christopher G. Demetriou.
19 # 4. The name of the author may not be used to endorse or promote products
20 # derived from this software without specific prior written permission
21 #
22 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33 # @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93
34
35 set -e
36
37 case $# in
38 2) ;;
39 *) echo "Usage: $0 config-file input-file" 1>&2
40 exit 1
41 ;;
42 esac
43
44 # the config file sets the following variables:
45 # sysnames the syscall names file
46 # sysnumhdr the syscall numbers file
47 # syssw the syscall switch file
48 # sysarghdr the syscall argument struct definitions
49 # compatopts those syscall types that are for 'compat' syscalls
50 # switchname the name for the 'struct sysent' we define
51 # namesname the name for the 'const char *[]' we define
52 # constprefix the prefix for the system call constants
53 # registertype the type for register_t
54 # nsysent the size of the sysent table
55 # sys_nosys [optional] name of function called for unsupported
56 # syscalls, if not sys_nosys()
57 #
58 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'.
59
60 # source the config file.
61 sys_nosys="sys_nosys" # default is sys_nosys(), if not specified otherwise
62 . ./$1
63
64 # tmp files:
65 sysdcl="sysent.dcl"
66 sysprotos="sys.protos"
67 syscompat_pref="sysent."
68 sysent="sysent.switch"
69 sysnamesbottom="sysnames.bottom"
70
71 trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0
72
73 # Awk program (must support nawk extensions)
74 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
75 awk=${AWK:-awk}
76
77 # Does this awk have a "toupper" function? (i.e. is it GNU awk)
78 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
79
80 # If this awk does not define "toupper" then define our own.
81 if [ "$isgawk" = TRUE ] ; then
82 # GNU awk provides it.
83 toupper=
84 else
85 # Provide our own toupper()
86 toupper='
87 function toupper(str) {
88 _toupper_cmd = "echo "str" |tr a-z A-Z"
89 _toupper_cmd | getline _toupper_str;
90 close(_toupper_cmd);
91 return _toupper_str;
92 }'
93 fi
94
95 # before handing it off to awk, make a few adjustments:
96 # (1) insert spaces around {, }, (, ), *, and commas.
97 # (2) get rid of any and all dollar signs (so that rcs id use safe)
98 #
99 # The awk script will deal with blank lines and lines that
100 # start with the comment character (';').
101
102 sed -e '
103 s/\$//g
104 :join
105 /\\$/{a\
106
107 N
108 s/\\\n//
109 b join
110 }
111 2,${
112 /^#/!s/\([{}()*,]\)/ \1 /g
113 }
114 ' < $2 | $awk "
115 $toupper
116 BEGIN {
117 # to allow nested #if/#else/#endif sets
118 savedepth = 0
119 # to track already processed syscalls
120
121 sysnames = \"$sysnames\"
122 sysprotos = \"$sysprotos\"
123 sysnumhdr = \"$sysnumhdr\"
124 sysarghdr = \"$sysarghdr\"
125 switchname = \"$switchname\"
126 namesname = \"$namesname\"
127 constprefix = \"$constprefix\"
128 registertype = \"$registertype\"
129 if (!registertype) {
130 registertype = \"register_t\"
131 }
132 nsysent = \"$nsysent\"
133
134 sysdcl = \"$sysdcl\"
135 syscompat_pref = \"$syscompat_pref\"
136 sysent = \"$sysent\"
137 sysnamesbottom = \"$sysnamesbottom\"
138 sys_nosys = \"$sys_nosys\"
139 infile = \"$2\"
140
141 compatopts = \"$compatopts\"
142 "'
143
144 printf "/* \$NetBSD\$ */\n\n" > sysdcl
145 printf "/*\n * System call switch table.\n *\n" > sysdcl
146 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl
147
148 ncompat = split(compatopts,compat)
149 for (i = 1; i <= ncompat; i++) {
150 compat_upper[i] = toupper(compat[i])
151
152 printf "\n#ifdef %s\n", compat_upper[i] > sysent
153 printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \
154 compat[i] > sysent
155 printf "#else\n" > sysent
156 printf "#define %s(func) %s\n", compat[i], sys_nosys > sysent
157 printf "#endif\n" > sysent
158 }
159
160 printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent
161 printf "struct sysent %s[] = {\n",switchname > sysent
162
163 printf "/* \$NetBSD\$ */\n\n" > sysnames
164 printf "/*\n * System call names.\n *\n" > sysnames
165 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
166
167 printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos
168
169 printf "/* \$NetBSD\$ */\n\n" > sysnumhdr
170 printf "/*\n * System call numbers.\n *\n" > sysnumhdr
171 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr
172
173 printf "/* \$NetBSD\$ */\n\n" > sysarghdr
174 printf "/*\n * System call argument lists.\n *\n" > sysarghdr
175 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr
176 }
177 NR == 1 {
178 printf " * created from%s\n */\n\n", $0 > sysdcl
179 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysdcl
180
181 printf " * created from%s\n */\n\n", $0 > sysnames
182 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysnames
183
184 # System call names are included by userland (kdump(1)), so
185 # hide the include files from it.
186 printf "#if defined(_KERNEL_OPT)\n" > sysnames
187
188 printf "#endif /* _KERNEL_OPT */\n\n" > sysnamesbottom
189 printf "const char *const %s[] = {\n",namesname > sysnamesbottom
190
191 printf " * created from%s\n */\n\n", $0 > sysnumhdr
192
193 printf " * created from%s\n */\n\n", $0 > sysarghdr
194 printf "#ifndef _" constprefix "_SYSCALLARGS_H_\n" > sysarghdr
195 printf "#define _" constprefix "_SYSCALLARGS_H_\n\n" > sysarghdr
196 printf "#ifdef\tsyscallarg\n" > sysarghdr
197 printf "#undef\tsyscallarg\n" > sysarghdr
198 printf "#endif\n\n" > sysarghdr
199 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr
200 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr
201 printf "\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr
202 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr
203 printf "\t\tstruct { /* LINTED zero array dimension */\t\t\\\n" \
204 > sysarghdr
205 printf "\t\t\tint8_t pad[ /* CONSTCOND */\t\t\t\\\n" > sysarghdr
206 printf "\t\t\t\t(sizeof (%s) < sizeof (x))\t\\\n", \
207 registertype > sysarghdr
208 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr
209 printf "\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \
210 registertype > sysarghdr
211 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr
212 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr
213 printf "\t}\n" > sysarghdr
214 next
215 }
216 NF == 0 || $1 ~ /^;/ {
217 next
218 }
219 $0 ~ /^%%$/ {
220 intable = 1
221 next
222 }
223 $1 ~ /^#[ ]*include/ {
224 print > sysdcl
225 print > sysnames
226 next
227 }
228 $1 ~ /^#/ && !intable {
229 print > sysdcl
230 print > sysnames
231 next
232 }
233 $1 ~ /^#/ && intable {
234 if ($1 ~ /^#[ ]*if/) {
235 savedepth++
236 savesyscall[savedepth] = syscall
237 }
238 if ($1 ~ /^#[ ]*else/) {
239 if (savedepth <= 0) {
240 printf("%s: line %d: unbalanced #else\n", \
241 infile, NR)
242 exit 1
243 }
244 syscall = savesyscall[savedepth]
245 }
246 if ($1 ~ /^#[ ]*endif/) {
247 if (savedepth <= 0) {
248 printf("%s: line %d: unbalanced #endif\n", \
249 infile, NR)
250 exit 1
251 }
252 savedepth--
253 }
254 print > sysent
255 print > sysarghdr
256 print > sysnumhdr
257 print > sysprotos
258 print > sysnamesbottom
259 next
260 }
261 syscall != $1 {
262 printf "%s: line %d: syscall number out of sync at %d\n", \
263 infile, NR, syscall
264 printf "line is:\n"
265 print
266 exit 1
267 }
268 function parserr(was, wanted) {
269 printf "%s: line %d: unexpected %s (expected %s)\n", \
270 infile, NR, was, wanted
271 printf "line is:\n"
272 print
273 exit 1
274 }
275 function parseline() {
276 f=3 # toss number and type
277 sycall_flags="0"
278 if ($NF != "}") {
279 funcalias=$NF
280 end=NF-1
281 } else {
282 funcalias=""
283 end=NF
284 }
285 if ($f == "MPSAFE") { # allow for MP-safe syscalls
286 sycall_flags = sprintf("SYCALL_MPSAFE | %s", sycall_flags)
287 f++
288 }
289 if ($f ~ /^[a-z0-9_]*$/) { # allow syscall alias
290 funcalias=$f
291 f++
292 }
293 if ($f != "{")
294 parserr($f, "{")
295 f++
296 if ($end != "}")
297 parserr($end, "}")
298 end--
299 if ($end != ";")
300 parserr($end, ";")
301 end--
302 if ($end != ")")
303 parserr($end, ")")
304 end--
305
306 returntype = oldf = "";
307 do {
308 if (returntype != "" && oldf != "*")
309 returntype = returntype" ";
310 returntype = returntype$f;
311 oldf = $f;
312 f++
313 } while (f < (end - 1) && $(f+1) != "(");
314 if (f == (end - 1)) {
315 parserr($f, "function argument definition (maybe \"(\"?)");
316 }
317
318 funcname=$f
319 if (funcalias == "") {
320 funcalias=funcname
321 sub(/^([^_]+_)*sys_/, "", funcalias)
322 }
323 f++
324
325 if ($f != "(")
326 parserr($f, ")")
327 f++
328
329 argc=0;
330 if (f == end) {
331 if ($f != "void")
332 parserr($f, "argument definition")
333 isvarargs = 0;
334 varargc = 0;
335 return
336 }
337
338 # some system calls (open() and fcntl()) can accept a variable
339 # number of arguments. If syscalls accept a variable number of
340 # arguments, they must still have arguments specified for
341 # the remaining argument "positions," because of the way the
342 # kernel system call argument handling works.
343 #
344 # Indirect system calls, e.g. syscall(), are exceptions to this
345 # rule, since they are handled entirely by machine-dependent code
346 # and do not need argument structures built.
347
348 isvarargs = 0;
349 while (f <= end) {
350 if ($f == "...") {
351 f++;
352 isvarargs = 1;
353 varargc = argc;
354 continue;
355 }
356 argc++
357 argtype[argc]=""
358 oldf=""
359 while (f < end && $(f+1) != ",") {
360 if (argtype[argc] != "" && oldf != "*")
361 argtype[argc] = argtype[argc]" ";
362 argtype[argc] = argtype[argc]$f;
363 oldf = $f;
364 f++
365 }
366 if (argtype[argc] == "")
367 parserr($f, "argument definition")
368 argname[argc]=$f;
369 f += 2; # skip name, and any comma
370 }
371 # must see another argument after varargs notice.
372 if (isvarargs) {
373 if (argc == varargc && $2 != "INDIR")
374 parserr($f, "argument definition")
375 } else
376 varargc = argc;
377 }
378
379 function printproto(wrap) {
380 printf("/* syscall: \"%s%s\" ret: \"%s\" args:", wrap, funcalias,
381 returntype) > sysnumhdr
382 for (i = 1; i <= varargc; i++)
383 printf(" \"%s\"", argtype[i]) > sysnumhdr
384 if (isvarargs)
385 printf(" \"...\"") > sysnumhdr
386 printf(" */\n") > sysnumhdr
387 printf("#define\t%s%s%s\t%d\n\n", constprefix, wrap, funcalias,
388 syscall) > sysnumhdr
389 }
390
391 function putent(nodefs, compatwrap) {
392 # output syscall declaration for switch table. INDIR functions
393 # get none, since they always have sys_nosys() for their table
394 # entries.
395 if (nodefs != "INDIR") {
396 prototype = "(struct lwp *, void *, register_t *)"
397 if (compatwrap == "")
398 proto = sprintf("int\t%s%s;\n", funcname, prototype);
399 else
400 proto = sprintf("int\t%s_%s%s;\n", compatwrap,
401 funcname, prototype);
402 if (sysmap[proto] != 1) {
403 sysmap[proto] = 1;
404 print proto > sysprotos;
405 }
406 }
407
408 # output syscall switch entry
409 if (nodefs == "INDIR") {
410 printf("\t{ 0, 0, %s,\n\t %s },\t\t\t/* %d = %s (indir) */\n", \
411 sycall_flags, sys_nosys, syscall, funcalias) > sysent
412 } else {
413 # printf("\t{ { %d", argc) > sysent
414 # for (i = 1; i <= argc; i++) {
415 # if (i == 5) # wrap the line
416 # printf(",\n\t ") > sysent
417 # else
418 # printf(", ") > sysent
419 # printf("s(%s)", argtypenospc[i]) > sysent
420 # }
421 printf("\t{ %d, ", argc) > sysent
422 if (argc == 0)
423 printf("0") > sysent
424 else if (compatwrap == "")
425 printf("s(struct %s_args)", funcname) > sysent
426 else
427 printf("s(struct %s_%s_args)", compatwrap,
428 funcname) > sysent
429 if (compatwrap == "")
430 wfn = sprintf("%s", funcname);
431 else
432 wfn = sprintf("%s(%s)", compatwrap, funcname);
433 printf(", %s,\n\t %s },", sycall_flags, wfn) > sysent
434 for (i = 0; i < (33 - length(wfn)) / 8; i++)
435 printf("\t") > sysent
436 if (compatwrap == "")
437 printf("/* %d = %s */\n", syscall, funcalias) > sysent
438 else
439 printf("/* %d = %s %s */\n", syscall, compatwrap,
440 funcalias) > sysent
441 }
442
443 # output syscall name for names table
444 if (compatwrap == "")
445 printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall,
446 funcalias) > sysnamesbottom
447 else
448 printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap,
449 funcalias, syscall, compatwrap, funcalias) > sysnamesbottom
450
451 # output syscall number of header, if appropriate
452 if (nodefs == "" || nodefs == "NOARGS" || nodefs == "INDIR") {
453 # output a prototype, to be used to generate lint stubs in
454 # libc.
455 printproto("")
456
457 } else if (nodefs == "COMPAT") {
458 # Just define the syscall number with a comment. These
459 # may be used by compatibility stubs in libc.
460 printproto(compatwrap "_")
461 } else if (nodefs != "NODEF")
462 printf("\t\t\t\t/* %d is %s %s */\n\n", syscall,
463 compatwrap, funcalias) > sysnumhdr
464
465 # output syscall argument structure, if it has arguments
466 if (argc != 0 && nodefs != "NOARGS" && nodefs != "INDIR") {
467 if (compatwrap == "")
468 printf("\nstruct %s_args {\n", funcname) > sysarghdr
469 else
470 printf("\nstruct %s_%s_args {\n", compatwrap,
471 funcname) > sysarghdr
472 for (i = 1; i <= argc; i++)
473 printf("\tsyscallarg(%s) %s;\n", argtype[i],
474 argname[i]) > sysarghdr
475 printf("};\n") > sysarghdr
476 }
477 }
478 $2 == "STD" {
479 parseline()
480 putent("", "");
481 syscall++
482 next
483 }
484 $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" {
485 parseline()
486 putent($2, "")
487 syscall++
488 next
489 }
490 $2 == "OBSOL" || $2 == "UNIMPL" || $2 == "EXCL" {
491 if ($2 == "OBSOL")
492 comment="obsolete"
493 else if ($2 == "EXCL")
494 comment="excluded"
495 else
496 comment="unimplemented"
497 for (i = 3; i <= NF; i++)
498 comment=comment " " $i
499
500 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = %s */\n", \
501 sys_nosys, syscall, comment) > sysent
502 printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \
503 syscall, comment, syscall, comment) > sysnamesbottom
504 if ($2 != "UNIMPL")
505 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr
506 syscall++
507 next
508 }
509 {
510 for (i = 1; i <= ncompat; i++) {
511 if ($2 == compat_upper[i]) {
512 parseline();
513 putent("COMPAT", compat[i])
514 syscall++
515 next
516 }
517 }
518 printf("%s: line %d: unrecognized keyword %s\n", infile, NR, $2)
519 exit 1
520 }
521 END {
522 maxsyscall = syscall
523 if (nsysent) {
524 if (syscall > nsysent) {
525 printf("%s: line %d: too many syscalls [%d > %d]\n", infile, NR, syscall, nsysent)
526 exit 1
527 }
528 while (syscall < nsysent) {
529 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = filler */\n", \
530 sys_nosys, syscall) > sysent
531 syscall++
532 }
533 }
534 printf("};\n\n") > sysent
535 printf("};\n") > sysnamesbottom
536 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, maxsyscall) > sysnumhdr
537 if (nsysent)
538 printf("#define\t%sNSYSENT\t%d\n", constprefix, nsysent) > sysnumhdr
539 } '
540
541 cat $sysprotos >> $sysarghdr
542 echo "#endif /* _${constprefix}_SYSCALLARGS_H_ */" >> $sysarghdr
543 cat $sysdcl $sysent > $syssw
544 cat $sysnamesbottom >> $sysnames
545
546 #chmod 444 $sysnames $sysnumhdr $syssw
Cache object: 5125f43977fac9cde5937cbd2a19b2ce
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