makesyscalls.sh revision 1.42
1 #! /bin/sh - 2 # $NetBSD: makesyscalls.sh,v 1.42 2000/12/09 05:41:12 mycroft 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 # source the config file. 45 . ./$1 46 47 # the config file sets the following variables: 48 # sysnames the syscall names file 49 # sysnumhdr the syscall numbers file 50 # syssw the syscall switch file 51 # sysarghdr the syscall argument struct definitions 52 # compatopts those syscall types that are for 'compat' syscalls 53 # switchname the name for the 'struct sysent' we define 54 # namesname the name for the 'const char *[]' we define 55 # constprefix the prefix for the system call constants 56 # registertype the type for register_t 57 # nsysent the size of the sysent table 58 # 59 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'. 60 61 # tmp files: 62 sysdcl="sysent.dcl" 63 sysprotos="sys.protos" 64 syscompat_pref="sysent." 65 sysent="sysent.switch" 66 sysnamesbottom="sysnames.bottom" 67 68 trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0 69 70 # Awk program (must support nawk extensions) 71 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 72 awk=${AWK:-awk} 73 74 # Does this awk have a "toupper" function? (i.e. is it GNU awk) 75 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 76 77 # If this awk does not define "toupper" then define our own. 78 if [ "$isgawk" = TRUE ] ; then 79 # GNU awk provides it. 80 toupper= 81 else 82 # Provide our own toupper() 83 toupper=' 84 function toupper(str) { 85 _toupper_cmd = "echo "str" |tr a-z A-Z" 86 _toupper_cmd | getline _toupper_str; 87 close(_toupper_cmd); 88 return _toupper_str; 89 }' 90 fi 91 92 # before handing it off to awk, make a few adjustments: 93 # (1) insert spaces around {, }, (, ), *, and commas. 94 # (2) get rid of any and all dollar signs (so that rcs id use safe) 95 # 96 # The awk script will deal with blank lines and lines that 97 # start with the comment character (';'). 98 99 sed -e ' 100 s/\$//g 101 :join 102 /\\$/{a\ 103 104 N 105 s/\\\n// 106 b join 107 } 108 2,${ 109 /^#/!s/\([{}()*,]\)/ \1 /g 110 } 111 ' < $2 | $awk " 112 $toupper 113 BEGIN { 114 # to allow nested #if/#else/#endif sets 115 savedepth = 0 116 117 sysnames = \"$sysnames\" 118 sysprotos = \"$sysprotos\" 119 sysnumhdr = \"$sysnumhdr\" 120 sysarghdr = \"$sysarghdr\" 121 switchname = \"$switchname\" 122 namesname = \"$namesname\" 123 constprefix = \"$constprefix\" 124 registertype = \"$registertype\" 125 if (!registertype) { 126 registertype = \"register_t\" 127 } 128 nsysent = \"$nsysent\" 129 130 sysdcl = \"$sysdcl\" 131 syscompat_pref = \"$syscompat_pref\" 132 sysent = \"$sysent\" 133 sysnamesbottom = \"$sysnamesbottom\" 134 infile = \"$2\" 135 136 compatopts = \"$compatopts\" 137 "' 138 139 printf "/* \$NetBSD\$ */\n\n" > sysdcl 140 printf "/*\n * System call switch table.\n *\n" > sysdcl 141 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl 142 143 ncompat = split(compatopts,compat) 144 for (i = 1; i <= ncompat; i++) { 145 compat_upper[i] = toupper(compat[i]) 146 147 printf "\n#ifdef %s\n", compat_upper[i] > sysent 148 printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \ 149 compat[i] > sysent 150 printf "#else\n" > sysent 151 printf "#define %s(func) sys_nosys\n", compat[i] > sysent 152 printf "#endif\n" > sysent 153 } 154 155 printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent 156 printf "struct sysent %s[] = {\n",switchname > sysent 157 158 printf "/* \$NetBSD\$ */\n\n" > sysnames 159 printf "/*\n * System call names.\n *\n" > sysnames 160 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames 161 162 printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos 163 164 printf "/* \$NetBSD\$ */\n\n" > sysnumhdr 165 printf "/*\n * System call numbers.\n *\n" > sysnumhdr 166 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr 167 168 printf "/* \$NetBSD\$ */\n\n" > sysarghdr 169 printf "/*\n * System call argument lists.\n *\n" > sysarghdr 170 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr 171 } 172 NR == 1 { 173 printf " * created from%s\n */\n\n", $0 > sysdcl 174 175 printf " * created from%s\n */\n\n", $0 > sysnames 176 177 # System call names are included by userland (kdump(1)), so 178 # hide the include files from it. 179 printf "#if defined(_KERNEL) && !defined(_LKM)\n" > sysnames 180 181 printf "#endif /* _KERNEL && ! _LKM */\n\n" > sysnamesbottom 182 printf "const char *const %s[] = {\n",namesname > sysnamesbottom 183 184 printf " * created from%s\n */\n\n", $0 > sysnumhdr 185 186 printf " * created from%s\n */\n\n", $0 > sysarghdr 187 printf "#ifndef _" constprefix "_SYSCALLARGS_H_\n" > sysarghdr 188 printf "#define _" constprefix "_SYSCALLARGS_H_\n\n" > sysarghdr 189 printf "#ifdef\tsyscallarg\n" > sysarghdr 190 printf "#undef\tsyscallarg\n" > sysarghdr 191 printf "#endif\n\n" > sysarghdr 192 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr 193 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr 194 printf "\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr 195 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr 196 printf "\t\tstruct {\t\t\t\t\t\t\\\n" > sysarghdr 197 printf "\t\t\tint8_t pad[ (sizeof (%s) < sizeof (x))\t\\\n", \ 198 registertype > sysarghdr 199 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr 200 printf "\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \ 201 registertype > sysarghdr 202 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr 203 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr 204 printf "\t}\n" > sysarghdr 205 next 206 } 207 NF == 0 || $1 ~ /^;/ { 208 next 209 } 210 $0 ~ /^%%$/ { 211 intable = 1 212 next 213 } 214 $1 ~ /^#[ ]*include/ { 215 print > sysdcl 216 print > sysnames 217 next 218 } 219 $1 ~ /^#/ && !intable { 220 print > sysdcl 221 print > sysnames 222 next 223 } 224 $1 ~ /^#/ && intable { 225 if ($1 ~ /^#[ ]*if/) { 226 savedepth++ 227 savesyscall[savedepth] = syscall 228 } 229 if ($1 ~ /^#[ ]*else/) { 230 if (savedepth <= 0) { 231 printf("%s: line %d: unbalanced #else\n", \ 232 infile, NR) 233 exit 1 234 } 235 syscall = savesyscall[savedepth] 236 } 237 if ($1 ~ /^#[ ]*endif/) { 238 if (savedepth <= 0) { 239 printf("%s: line %d: unbalanced #endif\n", \ 240 infile, NR) 241 exit 1 242 } 243 savedepth-- 244 } 245 print > sysent 246 print > sysprotos 247 print > sysnamesbottom 248 next 249 } 250 syscall != $1 { 251 printf "%s: line %d: syscall number out of sync at %d\n", \ 252 infile, NR, syscall 253 printf "line is:\n" 254 print 255 exit 1 256 } 257 function parserr(was, wanted) { 258 printf "%s: line %d: unexpected %s (expected %s)\n", \ 259 infile, NR, was, wanted 260 printf "line is:\n" 261 print 262 exit 1 263 } 264 function parseline() { 265 f=3 # toss number and type 266 if ($NF != "}") { 267 funcalias=$NF 268 end=NF-1 269 } else { 270 funcalias="" 271 end=NF 272 } 273 if ($f != "{") 274 parserr($f, "{") 275 f++ 276 if ($end != "}") 277 parserr($end, "}") 278 end-- 279 if ($end != ";") 280 parserr($end, ";") 281 end-- 282 if ($end != ")") 283 parserr($end, ")") 284 end-- 285 286 returntype = oldf = ""; 287 do { 288 if (returntype != "" && oldf != "*") 289 returntype = returntype" "; 290 returntype = returntype$f; 291 oldf = $f; 292 f++ 293 } while (f < (end - 1) && $(f+1) != "("); 294 if (f == (end - 1)) { 295 parserr($f, "function argument definition (maybe \"(\"?)"); 296 } 297 298 funcname=$f 299 if (funcalias == "") { 300 funcalias=funcname 301 sub(/^([^_]+_)*sys_/, "", funcalias) 302 } 303 f++ 304 305 if ($f != "(") 306 parserr($f, ")") 307 f++ 308 309 argc=0; 310 if (f == end) { 311 if ($f != "void") 312 parserr($f, "argument definition") 313 isvarargs = 0; 314 varargc = 0; 315 return 316 } 317 318 # some system calls (open() and fcntl()) can accept a variable 319 # number of arguments. If syscalls accept a variable number of 320 # arguments, they must still have arguments specified for 321 # the remaining argument "positions," because of the way the 322 # kernel system call argument handling works. 323 # 324 # Indirect system calls, e.g. syscall(), are exceptions to this 325 # rule, since they are handled entirely by machine-dependent code 326 # and do not need argument structures built. 327 328 isvarargs = 0; 329 while (f <= end) { 330 if ($f == "...") { 331 f++; 332 isvarargs = 1; 333 varargc = argc; 334 continue; 335 } 336 argc++ 337 argtype[argc]="" 338 oldf="" 339 while (f < end && $(f+1) != ",") { 340 if (argtype[argc] != "" && oldf != "*") 341 argtype[argc] = argtype[argc]" "; 342 argtype[argc] = argtype[argc]$f; 343 oldf = $f; 344 f++ 345 } 346 if (argtype[argc] == "") 347 parserr($f, "argument definition") 348 argname[argc]=$f; 349 f += 2; # skip name, and any comma 350 } 351 # must see another argument after varargs notice. 352 if (isvarargs) { 353 if (argc == varargc && $2 != "INDIR") 354 parserr($f, "argument definition") 355 } else 356 varargc = argc; 357 } 358 function putent(nodefs, compatwrap) { 359 # output syscall declaration for switch table. INDIR functions 360 # get none, since they always have sys_nosys() for their table 361 # entries. 362 if (nodefs != "INDIR") { 363 prototype = "(struct proc *, void *, register_t *)" 364 if (compatwrap == "") 365 printf("int\t%s%s;\n", funcname, 366 prototype) > sysprotos 367 else 368 printf("int\t%s_%s%s;\n", compatwrap, funcname, 369 prototype) > sysprotos 370 } 371 372 # output syscall switch entry 373 if (nodefs == "INDIR") { 374 printf("\t{ 0, 0,\n\t sys_nosys },\t\t\t/* %d = %s (indir) */\n", \ 375 syscall, funcalias) > sysent 376 } else { 377 # printf("\t{ { %d", argc) > sysent 378 # for (i = 1; i <= argc; i++) { 379 # if (i == 5) # wrap the line 380 # printf(",\n\t ") > sysent 381 # else 382 # printf(", ") > sysent 383 # printf("s(%s)", argtypenospc[i]) > sysent 384 # } 385 printf("\t{ %d, ", argc) > sysent 386 if (argc == 0) 387 printf("0") > sysent 388 else if (compatwrap == "") 389 printf("s(struct %s_args)", funcname) > sysent 390 else 391 printf("s(struct %s_%s_args)", compatwrap, 392 funcname) > sysent 393 if (compatwrap == "") 394 wfn = sprintf("%s", funcname); 395 else 396 wfn = sprintf("%s(%s)", compatwrap, funcname); 397 printf(",\n\t %s },", wfn) > sysent 398 for (i = 0; i < (33 - length(wfn)) / 8; i++) 399 printf("\t") > sysent 400 if (compatwrap == "") 401 printf("/* %d = %s */\n", syscall, funcalias) > sysent 402 else 403 printf("/* %d = %s %s */\n", syscall, compatwrap, 404 funcalias) > sysent 405 } 406 407 # output syscall name for names table 408 if (compatwrap == "") 409 printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall, 410 funcalias) > sysnamesbottom 411 else 412 printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap, 413 funcalias, syscall, compatwrap, funcalias) > sysnamesbottom 414 415 # output syscall number of header, if appropriate 416 if (nodefs == "" || nodefs == "NOARGS" || nodefs == "INDIR") { 417 # output a prototype, to be used to generate lint stubs in 418 # libc. 419 printf("/* syscall: \"%s\" ret: \"%s\" args:", funcalias, 420 returntype) > sysnumhdr 421 for (i = 1; i <= varargc; i++) 422 printf(" \"%s\"", argtype[i]) > sysnumhdr 423 if (isvarargs) 424 printf(" \"...\"") > sysnumhdr 425 printf(" */\n") > sysnumhdr 426 427 printf("#define\t%s%s\t%d\n\n", constprefix, funcalias, 428 syscall) > sysnumhdr 429 } else if (nodefs == "COMPAT") { 430 # Just define the syscall number with a comment. These 431 # may be used by compatibility stubs in libc. 432 printf("#define\t%s%s_%s\t%d\n\n", 433 constprefix, compatwrap, funcalias, syscall) > sysnumhdr 434 } else if (nodefs != "NODEF") 435 printf("\t\t\t\t/* %d is %s %s */\n\n", syscall, 436 compatwrap, funcalias) > sysnumhdr 437 438 # output syscall argument structure, if it has arguments 439 if (argc != 0 && nodefs != "NOARGS" && nodefs != "INDIR") { 440 if (compatwrap == "") 441 printf("\nstruct %s_args {\n", funcname) > sysarghdr 442 else 443 printf("\nstruct %s_%s_args {\n", compatwrap, 444 funcname) > sysarghdr 445 for (i = 1; i <= argc; i++) 446 printf("\tsyscallarg(%s) %s;\n", argtype[i], 447 argname[i]) > sysarghdr 448 printf("};\n") > sysarghdr 449 } 450 } 451 $2 == "STD" { 452 parseline() 453 putent("", ""); 454 syscall++ 455 next 456 } 457 $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" { 458 parseline() 459 putent($2, "") 460 syscall++ 461 next 462 } 463 $2 == "OBSOL" || $2 == "UNIMPL" || $2 == "EXCL" { 464 if ($2 == "OBSOL") 465 comment="obsolete" 466 else if ($2 == "EXCL") 467 comment="excluded" 468 else 469 comment="unimplemented" 470 for (i = 3; i <= NF; i++) 471 comment=comment " " $i 472 473 printf("\t{ 0, 0,\n\t sys_nosys },\t\t\t/* %d = %s */\n", \ 474 syscall, comment) > sysent 475 printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \ 476 syscall, comment, syscall, comment) > sysnamesbottom 477 if ($2 != "UNIMPL") 478 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr 479 syscall++ 480 next 481 } 482 { 483 for (i = 1; i <= ncompat; i++) { 484 if ($2 == compat_upper[i]) { 485 parseline(); 486 putent("COMPAT", compat[i]) 487 syscall++ 488 next 489 } 490 } 491 printf("%s: line %d: unrecognized keyword %s\n", infile, NR, $2) 492 exit 1 493 } 494 END { 495 maxsyscall = syscall 496 if (nsysent) { 497 if (syscall > nsysent) { 498 printf("%s: line %d: too many syscalls\n", infile, NR) 499 exit 1 500 } 501 while (syscall < nsysent) { 502 printf("\t{ 0, 0,\n\t sys_nosys },\t\t\t/* %d = filler */\n", \ 503 syscall) > sysent 504 syscall++ 505 } 506 } 507 printf("};\n\n") > sysent 508 printf("};\n") > sysnamesbottom 509 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, maxsyscall) > sysnumhdr 510 if (nsysent) 511 printf("#define\t%sNSYSENT\t%d\n", constprefix, nsysent) > sysnumhdr 512 } ' 513 514 cat $sysprotos >> $sysarghdr 515 echo "#endif /* _${constprefix}_SYSCALLARGS_H_ */" >> $sysarghdr 516 cat $sysdcl $sysent > $syssw 517 cat $sysnamesbottom >> $sysnames 518 519 #chmod 444 $sysnames $sysnumhdr $syssw 520
Indexes created Sun Oct 12 09:09:55 GMT 2025