1 #! /bin/sh -
2 # $NetBSD: makesyscalls.sh,v 1.58 2005/02/26 23:32:31 perry 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 'SYSLIBCOMPAT'.
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?
78 have_toupper=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
79
80 # If this awk does not define "toupper" then define our own.
81 if [ "$have_toupper" = TRUE ] ; then
82 # Used awk (GNU awk or nawk) 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 sub(/ $/, "")
179 printf " * created from%s\n */\n\n", $0 > sysdcl
180 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysdcl
181
182 printf " * created from%s\n */\n\n", $0 > sysnames
183 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysnames
184
185 # System call names are included by userland (kdump(1)), so
186 # hide the include files from it.
187 printf "#if defined(_KERNEL_OPT)\n" > sysnames
188
189 printf "#endif /* _KERNEL_OPT */\n\n" > sysnamesbottom
190 printf "const char *const %s[] = {\n",namesname > sysnamesbottom
191
192 printf " * created from%s\n */\n\n", $0 > sysnumhdr
193
194 printf " * created from%s\n */\n\n", $0 > sysarghdr
195 printf "#ifndef _" constprefix "_SYSCALLARGS_H_\n" > sysarghdr
196 printf "#define _" constprefix "_SYSCALLARGS_H_\n\n" > sysarghdr
197 printf "#ifdef\tsyscallarg\n" > sysarghdr
198 printf "#undef\tsyscallarg\n" > sysarghdr
199 printf "#endif\n\n" > sysarghdr
200 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr
201 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr
202 printf "\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr
203 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr
204 printf "\t\tstruct { /* LINTED zero array dimension */\t\t\\\n" \
205 > sysarghdr
206 printf "\t\t\tint8_t pad[ /* CONSTCOND */\t\t\t\\\n" > sysarghdr
207 printf "\t\t\t\t(sizeof (%s) < sizeof (x))\t\\\n", \
208 registertype > sysarghdr
209 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr
210 printf "\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \
211 registertype > sysarghdr
212 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr
213 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr
214 printf "\t}\n" > sysarghdr
215 next
216 }
217 NF == 0 || $1 ~ /^;/ {
218 next
219 }
220 $0 ~ /^%%$/ {
221 intable = 1
222 next
223 }
224 $1 ~ /^#[ ]*include/ {
225 print > sysdcl
226 print > sysnames
227 next
228 }
229 $1 ~ /^#/ && !intable {
230 print > sysdcl
231 print > sysnames
232 next
233 }
234 $1 ~ /^#/ && intable {
235 if ($1 ~ /^#[ ]*if/) {
236 savedepth++
237 savesyscall[savedepth] = syscall
238 }
239 if ($1 ~ /^#[ ]*else/) {
240 if (savedepth <= 0) {
241 printf("%s: line %d: unbalanced #else\n", \
242 infile, NR)
243 exit 1
244 }
245 syscall = savesyscall[savedepth]
246 }
247 if ($1 ~ /^#[ ]*endif/) {
248 if (savedepth <= 0) {
249 printf("%s: line %d: unbalanced #endif\n", \
250 infile, NR)
251 exit 1
252 }
253 savedepth--
254 }
255 print > sysent
256 print > sysarghdr
257 print > sysnumhdr
258 print > sysprotos
259 print > sysnamesbottom
260 next
261 }
262 syscall != $1 {
263 printf "%s: line %d: syscall number out of sync at %d\n", \
264 infile, NR, syscall
265 printf "line is:\n"
266 print
267 exit 1
268 }
269 function parserr(was, wanted) {
270 printf "%s: line %d: unexpected %s (expected %s)\n", \
271 infile, NR, was, wanted
272 printf "line is:\n"
273 print
274 exit 1
275 }
276 function parseline() {
277 f=3 # toss number and type
278 sycall_flags="0"
279 if ($NF != "}") {
280 funcalias=$NF
281 end=NF-1
282 } else {
283 funcalias=""
284 end=NF
285 }
286 if ($f == "MPSAFE") { # allow for MP-safe syscalls
287 sycall_flags = sprintf("SYCALL_MPSAFE | %s", sycall_flags)
288 f++
289 }
290 if ($f ~ /^[a-z0-9_]*$/) { # allow syscall alias
291 funcalias=$f
292 f++
293 }
294 if ($f != "{")
295 parserr($f, "{")
296 f++
297 if ($end != "}")
298 parserr($end, "}")
299 end--
300 if ($end != ";")
301 parserr($end, ";")
302 end--
303 if ($end != ")")
304 parserr($end, ")")
305 end--
306
307 returntype = oldf = "";
308 do {
309 if (returntype != "" && oldf != "*")
310 returntype = returntype" ";
311 returntype = returntype$f;
312 oldf = $f;
313 f++
314 } while (f < (end - 1) && $(f+1) != "(");
315 if (f == (end - 1)) {
316 parserr($f, "function argument definition (maybe \"(\"?)");
317 }
318
319 funcname=$f
320 if (funcalias == "") {
321 funcalias=funcname
322 sub(/^([^_]+_)*sys_/, "", funcalias)
323 }
324 f++
325
326 if ($f != "(")
327 parserr($f, ")")
328 f++
329
330 argc=0;
331 if (f == end) {
332 if ($f != "void")
333 parserr($f, "argument definition")
334 isvarargs = 0;
335 varargc = 0;
336 return
337 }
338
339 # some system calls (open() and fcntl()) can accept a variable
340 # number of arguments. If syscalls accept a variable number of
341 # arguments, they must still have arguments specified for
342 # the remaining argument "positions," because of the way the
343 # kernel system call argument handling works.
344 #
345 # Indirect system calls, e.g. syscall(), are exceptions to this
346 # rule, since they are handled entirely by machine-dependent code
347 # and do not need argument structures built.
348
349 isvarargs = 0;
350 while (f <= end) {
351 if ($f == "...") {
352 f++;
353 isvarargs = 1;
354 varargc = argc;
355 continue;
356 }
357 argc++
358 argtype[argc]=""
359 oldf=""
360 while (f < end && $(f+1) != ",") {
361 if (argtype[argc] != "" && oldf != "*")
362 argtype[argc] = argtype[argc]" ";
363 argtype[argc] = argtype[argc]$f;
364 oldf = $f;
365 f++
366 }
367 if (argtype[argc] == "")
368 parserr($f, "argument definition")
369 argname[argc]=$f;
370 f += 2; # skip name, and any comma
371 }
372 # must see another argument after varargs notice.
373 if (isvarargs) {
374 if (argc == varargc && $2 != "INDIR")
375 parserr($f, "argument definition")
376 } else
377 varargc = argc;
378 }
379
380 function printproto(wrap) {
381 printf("/* syscall: \"%s%s\" ret: \"%s\" args:", wrap, funcalias,
382 returntype) > sysnumhdr
383 for (i = 1; i <= varargc; i++)
384 printf(" \"%s\"", argtype[i]) > sysnumhdr
385 if (isvarargs)
386 printf(" \"...\"") > sysnumhdr
387 printf(" */\n") > sysnumhdr
388 printf("#define\t%s%s%s\t%d\n\n", constprefix, wrap, funcalias,
389 syscall) > sysnumhdr
390 }
391
392 function putent(nodefs, compatwrap) {
393 # output syscall declaration for switch table. INDIR functions
394 # get none, since they always have sys_nosys() for their table
395 # entries.
396 if (nodefs != "INDIR") {
397 prototype = "(struct lwp *, void *, register_t *)"
398 if (compatwrap == "")
399 proto = sprintf("int\t%s%s;\n", funcname, prototype);
400 else
401 proto = sprintf("int\t%s_%s%s;\n", compatwrap,
402 funcname, prototype);
403 if (sysmap[proto] != 1) {
404 sysmap[proto] = 1;
405 print proto > sysprotos;
406 }
407 }
408
409 # output syscall switch entry
410 if (nodefs == "INDIR") {
411 printf("\t{ 0, 0, %s,\n\t %s },\t\t\t/* %d = %s (indir) */\n", \
412 sycall_flags, sys_nosys, syscall, funcalias) > sysent
413 } else {
414 # printf("\t{ { %d", argc) > sysent
415 # for (i = 1; i <= argc; i++) {
416 # if (i == 5) # wrap the line
417 # printf(",\n\t ") > sysent
418 # else
419 # printf(", ") > sysent
420 # printf("s(%s)", argtypenospc[i]) > sysent
421 # }
422 printf("\t{ %d, ", argc) > sysent
423 if (argc == 0)
424 printf("0") > sysent
425 else if (compatwrap == "")
426 printf("s(struct %s_args)", funcname) > sysent
427 else
428 printf("s(struct %s_%s_args)", compatwrap,
429 funcname) > sysent
430 if (compatwrap == "")
431 wfn = sprintf("%s", funcname);
432 else
433 wfn = sprintf("%s(%s)", compatwrap, funcname);
434 printf(", %s,\n\t %s },", sycall_flags, wfn) > sysent
435 for (i = 0; i < (33 - length(wfn)) / 8; i++)
436 printf("\t") > sysent
437 if (compatwrap == "")
438 printf("/* %d = %s */\n", syscall, funcalias) > sysent
439 else
440 printf("/* %d = %s %s */\n", syscall, compatwrap,
441 funcalias) > sysent
442 }
443
444 # output syscall name for names table
445 if (compatwrap == "")
446 printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall,
447 funcalias) > sysnamesbottom
448 else
449 printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap,
450 funcalias, syscall, compatwrap, funcalias) > sysnamesbottom
451
452 # output syscall number of header, if appropriate
453 if (nodefs == "" || nodefs == "NOARGS" || nodefs == "INDIR") {
454 # output a prototype, to be used to generate lint stubs in
455 # libc.
456 printproto("")
457
458 } else if (nodefs == "COMPAT") {
459 # Just define the syscall number with a comment. These
460 # may be used by compatibility stubs in libc.
461 printproto(compatwrap "_")
462 } else if (nodefs != "NODEF")
463 printf("\t\t\t\t/* %d is %s %s */\n\n", syscall,
464 compatwrap, funcalias) > sysnumhdr
465
466 # output syscall argument structure, if it has arguments
467 if (argc != 0 && nodefs != "NOARGS" && nodefs != "INDIR") {
468 if (compatwrap == "")
469 printf("\nstruct %s_args {\n", funcname) > sysarghdr
470 else
471 printf("\nstruct %s_%s_args {\n", compatwrap,
472 funcname) > sysarghdr
473 for (i = 1; i <= argc; i++)
474 printf("\tsyscallarg(%s) %s;\n", argtype[i],
475 argname[i]) > sysarghdr
476 printf("};\n") > sysarghdr
477 }
478 }
479 $2 == "STD" {
480 parseline()
481 putent("", "");
482 syscall++
483 next
484 }
485 $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" {
486 parseline()
487 putent($2, "")
488 syscall++
489 next
490 }
491 $2 == "OBSOL" || $2 == "UNIMPL" || $2 == "EXCL" {
492 if ($2 == "OBSOL")
493 comment="obsolete"
494 else if ($2 == "EXCL")
495 comment="excluded"
496 else
497 comment="unimplemented"
498 for (i = 3; i <= NF; i++)
499 comment=comment " " $i
500
501 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = %s */\n", \
502 sys_nosys, syscall, comment) > sysent
503 printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \
504 syscall, comment, syscall, comment) > sysnamesbottom
505 if ($2 != "UNIMPL")
506 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr
507 syscall++
508 next
509 }
510 {
511 for (i = 1; i <= ncompat; i++) {
512 if ($2 == compat_upper[i]) {
513 parseline();
514 putent("COMPAT", compat[i])
515 syscall++
516 next
517 }
518 }
519 printf("%s: line %d: unrecognized keyword %s\n", infile, NR, $2)
520 exit 1
521 }
522 END {
523 maxsyscall = syscall
524 if (nsysent) {
525 if (syscall > nsysent) {
526 printf("%s: line %d: too many syscalls [%d > %d]\n", infile, NR, syscall, nsysent)
527 exit 1
528 }
529 while (syscall < nsysent) {
530 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = filler */\n", \
531 sys_nosys, syscall) > sysent
532 syscall++
533 }
534 }
535 printf("};\n\n") > sysent
536 printf("};\n") > sysnamesbottom
537 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, maxsyscall) > sysnumhdr
538 if (nsysent)
539 printf("#define\t%sNSYSENT\t%d\n", constprefix, nsysent) > sysnumhdr
540 } '
541
542 cat $sysprotos >> $sysarghdr
543 echo "#endif /* _${constprefix}_SYSCALLARGS_H_ */" >> $sysarghdr
544 cat $sysdcl $sysent > $syssw
545 cat $sysnamesbottom >> $sysnames
546
547 #chmod 444 $sysnames $sysnumhdr $syssw
Cache object: 867937d26927aa90f0ec3c02a42b7077
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