Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/kern/makesyscalls.sh
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1 #! /bin/sh - 2 # $NetBSD: makesyscalls.sh,v 1.73 2008/10/13 18:16:33 pooka 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 # sysalign check for alignment of off_t 46 # sysnames the syscall names file 47 # sysnumhdr the syscall numbers file 48 # syssw the syscall switch file 49 # sysarghdr the syscall argument struct definitions 50 # compatopts those syscall types that are for 'compat' syscalls 51 # switchname the name for the 'struct sysent' we define 52 # namesname the name for the 'const char *[]' we define 53 # constprefix the prefix for the system call constants 54 # registertype the type for register_t 55 # nsysent the size of the sysent table 56 # sys_nosys [optional] name of function called for unsupported 57 # syscalls, if not sys_nosys() 58 # maxsysargs [optiona] the maximum number or arguments 59 # 60 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'SYSLIBCOMPAT'. 61 62 # source the config file. 63 sys_nosys="sys_nosys" # default is sys_nosys(), if not specified otherwise 64 maxsysargs=8 # default limit is 8 (32bit) arguments 65 rumpcalls="/dev/null" 66 rumpcallshdr="/dev/null" 67 . ./$1 68 69 # tmp files: 70 sysdcl="sysent.dcl" 71 sysprotos="sys.protos" 72 syscompat_pref="sysent." 73 sysent="sysent.switch" 74 sysnamesbottom="sysnames.bottom" 75 76 trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0 77 78 # Awk program (must support nawk extensions) 79 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 80 awk=${AWK:-awk} 81 82 # Does this awk have a "toupper" function? 83 have_toupper=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 84 85 # If this awk does not define "toupper" then define our own. 86 if [ "$have_toupper" = TRUE ] ; then 87 # Used awk (GNU awk or nawk) provides it 88 toupper= 89 else 90 # Provide our own toupper() 91 toupper=' 92 function toupper(str) { 93 _toupper_cmd = "echo "str" |tr a-z A-Z" 94 _toupper_cmd | getline _toupper_str; 95 close(_toupper_cmd); 96 return _toupper_str; 97 }' 98 fi 99 100 # before handing it off to awk, make a few adjustments: 101 # (1) insert spaces around {, }, (, ), *, and commas. 102 # (2) get rid of any and all dollar signs (so that rcs id use safe) 103 # 104 # The awk script will deal with blank lines and lines that 105 # start with the comment character (';'). 106 107 sed -e ' 108 s/\$//g 109 :join 110 /\\$/{a\ 111 112 N 113 s/\\\n// 114 b join 115 } 116 2,${ 117 /^#/!s/\([{}()*,]\)/ \1 /g 118 } 119 ' < $2 | $awk " 120 $toupper 121 BEGIN { 122 # Create a NetBSD tag that does not get expanded when checking 123 # this script out of CVS. (This part of the awk script is in a 124 # shell double-quoted string, so the backslashes are eaten by 125 # the shell.) 126 tag = \"\$\" \"NetBSD\" \"\$\" 127 128 # to allow nested #if/#else/#endif sets 129 savedepth = 0 130 # to track already processed syscalls 131 132 sysnames = \"$sysnames\" 133 sysprotos = \"$sysprotos\" 134 sysnumhdr = \"$sysnumhdr\" 135 sysarghdr = \"$sysarghdr\" 136 rumpcalls = \"$rumpcalls\" 137 rumpcallshdr = \"$rumpcallshdr\" 138 switchname = \"$switchname\" 139 namesname = \"$namesname\" 140 constprefix = \"$constprefix\" 141 registertype = \"$registertype\" 142 sysalign=\"$sysalign\" 143 if (!registertype) { 144 registertype = \"register_t\" 145 } 146 nsysent = \"$nsysent\" 147 148 sysdcl = \"$sysdcl\" 149 syscompat_pref = \"$syscompat_pref\" 150 sysent = \"$sysent\" 151 sysnamesbottom = \"$sysnamesbottom\" 152 sys_nosys = \"$sys_nosys\" 153 maxsysargs = \"$maxsysargs\" 154 infile = \"$2\" 155 156 compatopts = \"$compatopts\" 157 "' 158 159 printf "/* %s */\n\n", tag > sysdcl 160 printf "/*\n * System call switch table.\n *\n" > sysdcl 161 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl 162 163 ncompat = split(compatopts,compat) 164 for (i = 1; i <= ncompat; i++) { 165 compat_upper[i] = toupper(compat[i]) 166 167 printf "\n#ifdef %s\n", compat_upper[i] > sysent 168 printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \ 169 compat[i] > sysent 170 printf "#else\n" > sysent 171 printf "#define %s(func) %s\n", compat[i], sys_nosys > sysent 172 printf "#endif\n" > sysent 173 } 174 175 printf "\n#define\ts(type)\tsizeof(type)\n" > sysent 176 printf "#define\tn(type)\t(sizeof(type)/sizeof (%s))\n", registertype > sysent 177 printf "#define\tns(type)\tn(type), s(type)\n\n", registertype > sysent 178 printf "struct sysent %s[] = {\n",switchname > sysent 179 180 printf "/* %s */\n\n", tag > sysnames 181 printf "/*\n * System call names.\n *\n" > sysnames 182 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames 183 184 printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos 185 186 printf "/* %s */\n\n", tag > sysnumhdr 187 printf "/*\n * System call numbers.\n *\n" > sysnumhdr 188 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr 189 190 printf "/* %s */\n\n", tag > sysarghdr 191 printf "/*\n * System call argument lists.\n *\n" > sysarghdr 192 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr 193 194 printf "/* %s */\n\n", tag > rumpcalls 195 printf "/*\n * System call marshalling for rump.\n *\n" > rumpcalls 196 printf " * DO NOT EDIT-- this file is automatically generated.\n" > rumpcalls 197 198 printf "/* %s */\n\n", tag > rumpcallshdr 199 printf "/*\n * System call protos in rump namespace.\n *\n" > rumpcallshdr 200 printf " * DO NOT EDIT-- this file is automatically generated.\n" > rumpcallshdr 201 } 202 NR == 1 { 203 sub(/ $/, "") 204 printf " * created from%s\n */\n\n", $0 > sysdcl 205 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"%s\");\n\n", tag > sysdcl 206 207 printf " * created from%s\n */\n\n", $0 > sysnames 208 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"%s\");\n\n", tag > sysnames 209 210 printf " * created from%s\n */\n\n", $0 > rumpcalls 211 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"%s\");\n\n", tag > rumpcalls 212 printf "#include <sys/types.h>\n" > rumpcalls 213 printf "#include <sys/param.h>\n" > rumpcalls 214 printf "#include <sys/proc.h>\n" > rumpcalls 215 printf "#include <sys/syscallargs.h>\n" > rumpcalls 216 printf "#include \"rump_syscalls.h\"\n" > rumpcalls 217 printf "#include \"rump_private.h\"\n\n" > rumpcalls 218 printf "#if\tBYTE_ORDER == BIG_ENDIAN\n" > rumpcalls 219 printf "#define SPARG(p,k)\t((p)->k.be.datum)\n" > rumpcalls 220 printf "#else /* LITTLE_ENDIAN, I hope dearly */\n" > rumpcalls 221 printf "#define SPARG(p,k)\t((p)->k.le.datum)\n" > rumpcalls 222 printf "#endif\n\n" > rumpcalls 223 printf "int rump_enosys(void);\n" > rumpcalls 224 printf "int\nrump_enosys()\n{\n\n\treturn ENOSYS;\n}\n" > rumpcalls 225 226 # System call names are included by userland (kdump(1)), so 227 # hide the include files from it. 228 printf "#if defined(_KERNEL_OPT)\n" > sysnames 229 230 printf "#endif /* _KERNEL_OPT */\n\n" > sysnamesbottom 231 printf "const char *const %s[] = {\n",namesname > sysnamesbottom 232 233 printf " * created from%s\n */\n\n", $0 > sysnumhdr 234 235 printf " * created from%s\n */\n\n", $0 > sysarghdr 236 237 printf " * created from%s\n */\n\n", $0 > rumpcallshdr 238 239 printf "#ifndef _" constprefix "SYSCALL_H_\n" > sysnumhdr 240 printf "#define _" constprefix "SYSCALL_H_\n\n" > sysnumhdr 241 printf "#ifndef _" constprefix "SYSCALLARGS_H_\n" > sysarghdr 242 printf "#define _" constprefix "SYSCALLARGS_H_\n\n" > sysarghdr 243 # Write max number of system call arguments to both headers 244 printf("#define\t%sMAXSYSARGS\t%d\n\n", constprefix, maxsysargs) \ 245 > sysnumhdr 246 printf("#define\t%sMAXSYSARGS\t%d\n\n", constprefix, maxsysargs) \ 247 > sysarghdr 248 printf "#undef\tsyscallarg\n" > sysarghdr 249 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr 250 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr 251 printf "\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr 252 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr 253 printf "\t\tstruct { /* LINTED zero array dimension */\t\t\\\n" \ 254 > sysarghdr 255 printf "\t\t\tint8_t pad[ /* CONSTCOND */\t\t\t\\\n" > sysarghdr 256 printf "\t\t\t\t(sizeof (%s) < sizeof (x))\t\\\n", \ 257 registertype > sysarghdr 258 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr 259 printf "\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \ 260 registertype > sysarghdr 261 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr 262 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr 263 printf "\t}\n" > sysarghdr 264 printf("\n#undef check_syscall_args\n") >sysarghdr 265 printf("#define check_syscall_args(call) \\\n" \ 266 "\ttypedef char call##_check_args" \ 267 "[sizeof (struct call##_args) \\\n" \ 268 "\t\t<= %sMAXSYSARGS * sizeof (%s) ? 1 : -1];\n", \ 269 constprefix, registertype) >sysarghdr 270 next 271 } 272 NF == 0 || $1 ~ /^;/ { 273 next 274 } 275 $0 ~ /^%%$/ { 276 intable = 1 277 next 278 } 279 $1 ~ /^#[ ]*include/ { 280 print > sysdcl 281 print > sysnames 282 next 283 } 284 $1 ~ /^#/ && !intable { 285 print > sysdcl 286 print > sysnames 287 next 288 } 289 $1 ~ /^#/ && intable { 290 if ($1 ~ /^#[ ]*if/) { 291 savedepth++ 292 savesyscall[savedepth] = syscall 293 } 294 if ($1 ~ /^#[ ]*else/) { 295 if (savedepth <= 0) { 296 printf("%s: line %d: unbalanced #else\n", \ 297 infile, NR) 298 exit 1 299 } 300 syscall = savesyscall[savedepth] 301 } 302 if ($1 ~ /^#[ ]*endif/) { 303 if (savedepth <= 0) { 304 printf("%s: line %d: unbalanced #endif\n", \ 305 infile, NR) 306 exit 1 307 } 308 savedepth-- 309 } 310 print > sysent 311 print > sysarghdr 312 print > sysnumhdr 313 print > sysprotos 314 print > sysnamesbottom 315 next 316 } 317 syscall != $1 { 318 printf "%s: line %d: syscall number out of sync at %d\n", \ 319 infile, NR, syscall 320 printf "line is:\n" 321 print 322 exit 1 323 } 324 function parserr(was, wanted) { 325 printf "%s: line %d: unexpected %s (expected %s)\n", \ 326 infile, NR, was, wanted 327 printf "line is:\n" 328 print 329 exit 1 330 } 331 function parseline() { 332 f=3 # toss number and type 333 if ($2 == "INDIR") 334 sycall_flags="SYCALL_INDIRECT" 335 else 336 sycall_flags="0" 337 if ($NF != "}") { 338 funcalias=$NF 339 end=NF-1 340 } else { 341 funcalias="" 342 end=NF 343 } 344 if ($f == "INDIR") { # allow for "NOARG INDIR" 345 sycall_flags = "SYCALL_INDIRECT | " sycall_flags 346 f++ 347 } 348 if ($f == "RUMP") { 349 rumpable = 1 350 f++ 351 } else { 352 rumpable = 0 353 } 354 if ($f ~ /^[a-z0-9_]*$/) { # allow syscall alias 355 funcalias=$f 356 f++ 357 } 358 if ($f != "{") 359 parserr($f, "{") 360 f++ 361 if ($end != "}") 362 parserr($end, "}") 363 end-- 364 if ($end != ";") 365 parserr($end, ";") 366 end-- 367 if ($end != ")") 368 parserr($end, ")") 369 end-- 370 371 returntype = oldf = ""; 372 do { 373 if (returntype != "" && oldf != "*") 374 returntype = returntype" "; 375 returntype = returntype$f; 376 oldf = $f; 377 f++ 378 } while (f < (end - 1) && $(f+1) != "("); 379 if (f == (end - 1)) { 380 parserr($f, "function argument definition (maybe \"(\"?)"); 381 } 382 383 funcname=$f 384 if (funcalias == "") { 385 funcalias=funcname 386 sub(/^([^_]+_)*sys_/, "", funcalias) 387 } 388 f++ 389 390 if ($f != "(") 391 parserr($f, ")") 392 f++ 393 394 argc=0; 395 argalign=0; 396 if (f == end) { 397 if ($f != "void") 398 parserr($f, "argument definition") 399 isvarargs = 0; 400 varargc = 0; 401 return 402 } 403 404 # some system calls (open() and fcntl()) can accept a variable 405 # number of arguments. If syscalls accept a variable number of 406 # arguments, they must still have arguments specified for 407 # the remaining argument "positions," because of the way the 408 # kernel system call argument handling works. 409 # 410 # Indirect system calls, e.g. syscall(), are exceptions to this 411 # rule, since they are handled entirely by machine-dependent code 412 # and do not need argument structures built. 413 414 isvarargs = 0; 415 while (f <= end) { 416 if ($f == "...") { 417 f++; 418 isvarargs = 1; 419 varargc = argc; 420 continue; 421 } 422 argc++ 423 argtype[argc]="" 424 oldf="" 425 while (f < end && $(f+1) != ",") { 426 if (argtype[argc] != "" && oldf != "*") 427 argtype[argc] = argtype[argc]" "; 428 argtype[argc] = argtype[argc]$f; 429 oldf = $f; 430 f++ 431 } 432 if (argtype[argc] == "") 433 parserr($f, "argument definition") 434 if (argtype[argc] == "off_t") { 435 if ((argalign % 2) != 0 && sysalign && 436 funcname != "sys_posix_fadvise") # XXX for now 437 parserr($f, "a padding argument") 438 } else { 439 argalign++; 440 } 441 argname[argc]=$f; 442 f += 2; # skip name, and any comma 443 } 444 # must see another argument after varargs notice. 445 if (isvarargs) { 446 if (argc == varargc) 447 parserr($f, "argument definition") 448 } else 449 varargc = argc; 450 } 451 452 function printproto(wrap) { 453 printf("/* syscall: \"%s%s\" ret: \"%s\" args:", wrap, funcalias, 454 returntype) > sysnumhdr 455 for (i = 1; i <= varargc; i++) 456 printf(" \"%s\"", argtype[i]) > sysnumhdr 457 if (isvarargs) 458 printf(" \"...\"") > sysnumhdr 459 printf(" */\n") > sysnumhdr 460 printf("#define\t%s%s%s\t%d\n\n", constprefix, wrap, funcalias, 461 syscall) > sysnumhdr 462 463 # rumpalooza 464 if (!rumpable) 465 return 466 467 if (wrap == "") 468 wrap = "sys" 469 printf("%s rump_%s_%s(", returntype, wrap, funcalias) > rumpcallshdr 470 for (i = 1; i <= argc; i++) 471 printf("%s, ", argtype[i]) > rumpcallshdr 472 printf("int *);\n") > rumpcallshdr 473 } 474 475 function putent(type, compatwrap) { 476 # output syscall declaration for switch table. 477 if (compatwrap == "") 478 compatwrap_ = "" 479 else 480 compatwrap_ = compatwrap "_" 481 if (argc == 0) 482 arg_type = "void"; 483 else { 484 arg_type = "struct " compatwrap_ funcname "_args"; 485 } 486 proto = "int\t" compatwrap_ funcname "(struct lwp *, const " \ 487 arg_type " *, register_t *);\n" 488 if (sysmap[proto] != 1) { 489 sysmap[proto] = 1; 490 print proto > sysprotos; 491 } 492 493 # output syscall switch entry 494 printf("\t{ ") > sysent 495 if (argc == 0) { 496 printf("0, 0, ") > sysent 497 } else { 498 printf("ns(struct %s%s_args), ", compatwrap_, funcname) > sysent 499 } 500 if (compatwrap == "") 501 wfn = "(sy_call_t *)" funcname; 502 else 503 wfn = "(sy_call_t *)" compatwrap "(" funcname ")"; 504 printf("%s,\n\t %s },", sycall_flags, wfn) > sysent 505 for (i = 0; i < (33 - length(wfn)) / 8; i++) 506 printf("\t") > sysent 507 printf("/* %d = %s%s */\n", syscall, compatwrap_, funcalias) > sysent 508 509 # output syscall name for names table 510 printf("\t/* %3d */\t\"%s%s\",\n", syscall, compatwrap_, funcalias) \ 511 > sysnamesbottom 512 513 # output syscall number of header, if appropriate 514 if (type == "STD" || type == "NOARGS" || type == "INDIR") { 515 # output a prototype, to be used to generate lint stubs in 516 # libc. 517 printproto("") 518 } else if (type == "COMPAT") { 519 # Just define the syscall number with a comment. These 520 # may be used by compatibility stubs in libc. 521 printproto(compatwrap_) 522 } 523 524 # output syscall argument structure, if it has arguments 525 if (argc != 0) { 526 printf("\nstruct %s%s_args", compatwrap_, funcname) > sysarghdr 527 if (type != "NOARGS") { 528 print " {" >sysarghdr; 529 for (i = 1; i <= argc; i++) 530 printf("\tsyscallarg(%s) %s;\n", argtype[i], 531 argname[i]) > sysarghdr 532 printf "}" >sysarghdr; 533 } 534 printf(";\n") > sysarghdr 535 if (type != "NOARGS" && type != "INDIR") { 536 printf("check_syscall_args(%s%s)\n", compatwrap_, 537 funcname) >sysarghdr 538 } 539 } 540 541 # output rump marshalling code if necessary 542 if (!rumpable) 543 return 544 545 printf("\n%s\nrump_%s(", returntype, funcname) > rumpcalls 546 for (i = 1; i <= argc; i++) { 547 printf("%s %s, ", argtype[i], argname[i]) > rumpcalls 548 } 549 printf("int *error)\n") > rumpcalls 550 printf("{\n\tregister_t retval = 0;\n") > rumpcalls 551 argarg = "NULL" 552 if (argc) { 553 argarg = "&arg" 554 printf("\tstruct %s%s_args arg;\n\n", funcname, compatwrap_) \ 555 > rumpcalls 556 for (i = 1; i <= argc; i++) { 557 printf("\tSPARG(&arg, %s) = %s;\n", \ 558 argname[i], argname[i]) > rumpcalls 559 } 560 printf("\n") > rumpcalls 561 } else { 562 printf("\n") > rumpcalls 563 } 564 printf("\t*error = %s(curlwp, %s, &retval);\n", funcname, argarg) \ 565 > rumpcalls 566 printf("\tif (*error)\n\t\tretval = -1;\n") > rumpcalls 567 if (returntype != "void") 568 printf("\treturn retval;\n") > rumpcalls 569 printf("}\n") > rumpcalls 570 printf("__weak_alias(%s,rump_enosys);\n", funcname) > rumpcalls 571 } 572 $2 == "STD" || $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" { 573 parseline() 574 putent($2, "") 575 syscall++ 576 next 577 } 578 $2 == "OBSOL" || $2 == "UNIMPL" || $2 == "EXCL" || $2 == "IGNORED" { 579 if ($2 == "OBSOL") 580 comment="obsolete" 581 else if ($2 == "EXCL") 582 comment="excluded" 583 else if ($2 == "IGNORED") 584 comment="ignored" 585 else 586 comment="unimplemented" 587 for (i = 3; i <= NF; i++) 588 comment=comment " " $i 589 590 if ($2 == "IGNORED") 591 sys_stub = "(sy_call_t *)nullop"; 592 else 593 sys_stub = sys_nosys; 594 595 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = %s */\n", \ 596 sys_stub, syscall, comment) > sysent 597 printf("\t/* %3d */\t\"#%d (%s)\",\n", syscall, syscall, comment) \ 598 > sysnamesbottom 599 if ($2 != "UNIMPL") 600 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr 601 syscall++ 602 next 603 } 604 { 605 for (i = 1; i <= ncompat; i++) { 606 if ($2 == compat_upper[i]) { 607 parseline(); 608 putent("COMPAT", compat[i]) 609 syscall++ 610 next 611 } 612 } 613 printf("%s: line %d: unrecognized keyword %s\n", infile, NR, $2) 614 exit 1 615 } 616 END { 617 maxsyscall = syscall 618 if (nsysent) { 619 if (syscall > nsysent) { 620 printf("%s: line %d: too many syscalls [%d > %d]\n", infile, NR, syscall, nsysent) 621 exit 1 622 } 623 while (syscall < nsysent) { 624 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = filler */\n", \ 625 sys_nosys, syscall) > sysent 626 syscall++ 627 } 628 } 629 printf("};\n\n") > sysent 630 printf("};\n") > sysnamesbottom 631 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, maxsyscall) > sysnumhdr 632 if (nsysent) 633 printf("#define\t%sNSYSENT\t%d\n", constprefix, nsysent) > sysnumhdr 634 } ' 635 636 cat $sysprotos >> $sysarghdr 637 echo "#endif /* _${constprefix}SYSCALL_H_ */" >> $sysnumhdr 638 echo "#endif /* _${constprefix}SYSCALLARGS_H_ */" >> $sysarghdr 639 cat $sysdcl $sysent > $syssw 640 cat $sysnamesbottom >> $sysnames 641 642 #chmod 444 $sysnames $sysnumhdr $syssw
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