makesyscalls.sh revision 1.58.4.4
1 #! /bin/sh - 2 # $NetBSD: makesyscalls.sh,v 1.58.4.4 2008/02/04 09:24:15 yamt 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 # maxsysargs [optiona] the maximum number or arguments 58 # 59 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'SYSLIBCOMPAT'. 60 61 # source the config file. 62 sys_nosys="sys_nosys" # default is sys_nosys(), if not specified otherwise 63 maxsysargs=8 # default limit is 8 (32bit) arguments 64 . ./$1 65 66 # tmp files: 67 sysdcl="sysent.dcl" 68 sysprotos="sys.protos" 69 syscompat_pref="sysent." 70 sysent="sysent.switch" 71 sysnamesbottom="sysnames.bottom" 72 73 trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0 74 75 # Awk program (must support nawk extensions) 76 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 77 awk=${AWK:-awk} 78 79 # Does this awk have a "toupper" function? 80 have_toupper=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 81 82 # If this awk does not define "toupper" then define our own. 83 if [ "$have_toupper" = TRUE ] ; then 84 # Used awk (GNU awk or nawk) provides it 85 toupper= 86 else 87 # Provide our own toupper() 88 toupper=' 89 function toupper(str) { 90 _toupper_cmd = "echo "str" |tr a-z A-Z" 91 _toupper_cmd | getline _toupper_str; 92 close(_toupper_cmd); 93 return _toupper_str; 94 }' 95 fi 96 97 # before handing it off to awk, make a few adjustments: 98 # (1) insert spaces around {, }, (, ), *, and commas. 99 # (2) get rid of any and all dollar signs (so that rcs id use safe) 100 # 101 # The awk script will deal with blank lines and lines that 102 # start with the comment character (';'). 103 104 sed -e ' 105 s/\$//g 106 :join 107 /\\$/{a\ 108 109 N 110 s/\\\n// 111 b join 112 } 113 2,${ 114 /^#/!s/\([{}()*,]\)/ \1 /g 115 } 116 ' < $2 | $awk " 117 $toupper 118 BEGIN { 119 # to allow nested #if/#else/#endif sets 120 savedepth = 0 121 # to track already processed syscalls 122 123 sysnames = \"$sysnames\" 124 sysprotos = \"$sysprotos\" 125 sysnumhdr = \"$sysnumhdr\" 126 sysarghdr = \"$sysarghdr\" 127 switchname = \"$switchname\" 128 namesname = \"$namesname\" 129 constprefix = \"$constprefix\" 130 registertype = \"$registertype\" 131 if (!registertype) { 132 registertype = \"register_t\" 133 } 134 nsysent = \"$nsysent\" 135 136 sysdcl = \"$sysdcl\" 137 syscompat_pref = \"$syscompat_pref\" 138 sysent = \"$sysent\" 139 sysnamesbottom = \"$sysnamesbottom\" 140 sys_nosys = \"$sys_nosys\" 141 maxsysargs = \"$maxsysargs\" 142 infile = \"$2\" 143 144 compatopts = \"$compatopts\" 145 "' 146 147 printf "/* \$NetBSD\$ */\n\n" > sysdcl 148 printf "/*\n * System call switch table.\n *\n" > sysdcl 149 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl 150 151 ncompat = split(compatopts,compat) 152 for (i = 1; i <= ncompat; i++) { 153 compat_upper[i] = toupper(compat[i]) 154 155 printf "\n#ifdef %s\n", compat_upper[i] > sysent 156 printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \ 157 compat[i] > sysent 158 printf "#else\n" > sysent 159 printf "#define %s(func) %s\n", compat[i], sys_nosys > sysent 160 printf "#endif\n" > sysent 161 } 162 163 printf "\n#define\ts(type)\tsizeof(type)\n" > sysent 164 printf "#define\tn(type)\t(sizeof(type)/sizeof (%s))\n", registertype > sysent 165 printf "#define\tns(type)\tn(type), s(type)\n\n", registertype > sysent 166 printf "struct sysent %s[] = {\n",switchname > sysent 167 168 printf "/* \$NetBSD\$ */\n\n" > sysnames 169 printf "/*\n * System call names.\n *\n" > sysnames 170 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames 171 172 printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos 173 174 printf "/* \$NetBSD\$ */\n\n" > sysnumhdr 175 printf "/*\n * System call numbers.\n *\n" > sysnumhdr 176 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr 177 178 printf "/* \$NetBSD\$ */\n\n" > sysarghdr 179 printf "/*\n * System call argument lists.\n *\n" > sysarghdr 180 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr 181 } 182 NR == 1 { 183 sub(/ $/, "") 184 printf " * created from%s\n */\n\n", $0 > sysdcl 185 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysdcl 186 187 printf " * created from%s\n */\n\n", $0 > sysnames 188 printf "#include <sys/cdefs.h>\n__KERNEL_RCSID(0, \"\$NetBSD\$\");\n\n" > sysnames 189 190 # System call names are included by userland (kdump(1)), so 191 # hide the include files from it. 192 printf "#if defined(_KERNEL_OPT)\n" > sysnames 193 194 printf "#endif /* _KERNEL_OPT */\n\n" > sysnamesbottom 195 printf "const char *const %s[] = {\n",namesname > sysnamesbottom 196 197 printf " * created from%s\n */\n\n", $0 > sysnumhdr 198 199 printf " * created from%s\n */\n\n", $0 > sysarghdr 200 printf "#ifndef _" constprefix "SYSCALL_H_\n" > sysnumhdr 201 printf "#define _" constprefix "SYSCALL_H_\n\n" > sysnumhdr 202 printf "#ifndef _" constprefix "SYSCALLARGS_H_\n" > sysarghdr 203 printf "#define _" constprefix "SYSCALLARGS_H_\n\n" > sysarghdr 204 # Write max number of system call arguments to both headers 205 printf("#define\t%sMAXSYSARGS\t%d\n\n", constprefix, maxsysargs) \ 206 > sysnumhdr 207 printf("#define\t%sMAXSYSARGS\t%d\n\n", constprefix, maxsysargs) \ 208 > sysarghdr 209 printf "#undef\tsyscallarg\n" > sysarghdr 210 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr 211 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr 212 printf "\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr 213 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr 214 printf "\t\tstruct { /* LINTED zero array dimension */\t\t\\\n" \ 215 > sysarghdr 216 printf "\t\t\tint8_t pad[ /* CONSTCOND */\t\t\t\\\n" > sysarghdr 217 printf "\t\t\t\t(sizeof (%s) < sizeof (x))\t\\\n", \ 218 registertype > sysarghdr 219 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr 220 printf "\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \ 221 registertype > sysarghdr 222 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr 223 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr 224 printf "\t}\n" > sysarghdr 225 printf("\n#undef check_syscall_args\n") >sysarghdr 226 printf("#define check_syscall_args(call) \\\n" \ 227 "\ttypedef char call##_check_args" \ 228 "[sizeof (struct call##_args) \\\n" \ 229 "\t\t<= %sMAXSYSARGS * sizeof (%s) ? 1 : -1];\n", \ 230 constprefix, registertype) >sysarghdr 231 next 232 } 233 NF == 0 || $1 ~ /^;/ { 234 next 235 } 236 $0 ~ /^%%$/ { 237 intable = 1 238 next 239 } 240 $1 ~ /^#[ ]*include/ { 241 print > sysdcl 242 print > sysnames 243 next 244 } 245 $1 ~ /^#/ && !intable { 246 print > sysdcl 247 print > sysnames 248 next 249 } 250 $1 ~ /^#/ && intable { 251 if ($1 ~ /^#[ ]*if/) { 252 savedepth++ 253 savesyscall[savedepth] = syscall 254 } 255 if ($1 ~ /^#[ ]*else/) { 256 if (savedepth <= 0) { 257 printf("%s: line %d: unbalanced #else\n", \ 258 infile, NR) 259 exit 1 260 } 261 syscall = savesyscall[savedepth] 262 } 263 if ($1 ~ /^#[ ]*endif/) { 264 if (savedepth <= 0) { 265 printf("%s: line %d: unbalanced #endif\n", \ 266 infile, NR) 267 exit 1 268 } 269 savedepth-- 270 } 271 print > sysent 272 print > sysarghdr 273 print > sysnumhdr 274 print > sysprotos 275 print > sysnamesbottom 276 next 277 } 278 syscall != $1 { 279 printf "%s: line %d: syscall number out of sync at %d\n", \ 280 infile, NR, syscall 281 printf "line is:\n" 282 print 283 exit 1 284 } 285 function parserr(was, wanted) { 286 printf "%s: line %d: unexpected %s (expected %s)\n", \ 287 infile, NR, was, wanted 288 printf "line is:\n" 289 print 290 exit 1 291 } 292 function parseline() { 293 f=3 # toss number and type 294 if ($2 == "INDIR") 295 sycall_flags="SYCALL_INDIRECT" 296 else 297 sycall_flags="0" 298 if ($NF != "}") { 299 funcalias=$NF 300 end=NF-1 301 } else { 302 funcalias="" 303 end=NF 304 } 305 if ($f == "INDIR") { # allow for "NOARG INDIR" 306 sycall_flags = "SYCALL_INDIRECT | " sycall_flags 307 f++ 308 } 309 if ($f == "MPSAFE") { # allow for MP-safe syscalls 310 sycall_flags = "SYCALL_MPSAFE | " sycall_flags 311 f++ 312 } 313 if ($f ~ /^[a-z0-9_]*$/) { # allow syscall alias 314 funcalias=$f 315 f++ 316 } 317 if ($f != "{") 318 parserr($f, "{") 319 f++ 320 if ($end != "}") 321 parserr($end, "}") 322 end-- 323 if ($end != ";") 324 parserr($end, ";") 325 end-- 326 if ($end != ")") 327 parserr($end, ")") 328 end-- 329 330 returntype = oldf = ""; 331 do { 332 if (returntype != "" && oldf != "*") 333 returntype = returntype" "; 334 returntype = returntype$f; 335 oldf = $f; 336 f++ 337 } while (f < (end - 1) && $(f+1) != "("); 338 if (f == (end - 1)) { 339 parserr($f, "function argument definition (maybe \"(\"?)"); 340 } 341 342 funcname=$f 343 if (funcalias == "") { 344 funcalias=funcname 345 sub(/^([^_]+_)*sys_/, "", funcalias) 346 } 347 f++ 348 349 if ($f != "(") 350 parserr($f, ")") 351 f++ 352 353 argc=0; 354 argalign=0; 355 if (f == end) { 356 if ($f != "void") 357 parserr($f, "argument definition") 358 isvarargs = 0; 359 varargc = 0; 360 return 361 } 362 363 # some system calls (open() and fcntl()) can accept a variable 364 # number of arguments. If syscalls accept a variable number of 365 # arguments, they must still have arguments specified for 366 # the remaining argument "positions," because of the way the 367 # kernel system call argument handling works. 368 # 369 # Indirect system calls, e.g. syscall(), are exceptions to this 370 # rule, since they are handled entirely by machine-dependent code 371 # and do not need argument structures built. 372 373 isvarargs = 0; 374 while (f <= end) { 375 if ($f == "...") { 376 f++; 377 isvarargs = 1; 378 varargc = argc; 379 continue; 380 } 381 argc++ 382 argtype[argc]="" 383 oldf="" 384 while (f < end && $(f+1) != ",") { 385 if (argtype[argc] != "" && oldf != "*") 386 argtype[argc] = argtype[argc]" "; 387 argtype[argc] = argtype[argc]$f; 388 oldf = $f; 389 f++ 390 } 391 if (argtype[argc] == "") 392 parserr($f, "argument definition") 393 if (argtype[argc] == "off_t") { 394 if ((argalign % 2) != 0 && 395 funcname != "sys_posix_fadvise") # XXX for now 396 parserr($f, "a padding argument") 397 } else { 398 argalign++; 399 } 400 argname[argc]=$f; 401 f += 2; # skip name, and any comma 402 } 403 # must see another argument after varargs notice. 404 if (isvarargs) { 405 if (argc == varargc) 406 parserr($f, "argument definition") 407 } else 408 varargc = argc; 409 } 410 411 function printproto(wrap) { 412 printf("/* syscall: \"%s%s\" ret: \"%s\" args:", wrap, funcalias, 413 returntype) > sysnumhdr 414 for (i = 1; i <= varargc; i++) 415 printf(" \"%s\"", argtype[i]) > sysnumhdr 416 if (isvarargs) 417 printf(" \"...\"") > sysnumhdr 418 printf(" */\n") > sysnumhdr 419 printf("#define\t%s%s%s\t%d\n\n", constprefix, wrap, funcalias, 420 syscall) > sysnumhdr 421 } 422 423 function putent(type, compatwrap) { 424 # output syscall declaration for switch table. 425 if (compatwrap == "") 426 compatwrap_ = "" 427 else 428 compatwrap_ = compatwrap "_" 429 if (argc == 0) 430 arg_type = "void"; 431 else { 432 arg_type = "struct " compatwrap_ funcname "_args"; 433 } 434 proto = "int\t" compatwrap_ funcname "(struct lwp *, const " \ 435 arg_type " *, register_t *);\n" 436 if (sysmap[proto] != 1) { 437 sysmap[proto] = 1; 438 print proto > sysprotos; 439 } 440 441 # output syscall switch entry 442 printf("\t{ ") > sysent 443 if (argc == 0) { 444 printf("0, 0, ") > sysent 445 } else { 446 printf("ns(struct %s%s_args), ", compatwrap_, funcname) > sysent 447 } 448 if (compatwrap == "") 449 wfn = "(sy_call_t *)" funcname; 450 else 451 wfn = "(sy_call_t *)" compatwrap "(" funcname ")"; 452 printf("%s,\n\t %s },", sycall_flags, wfn) > sysent 453 for (i = 0; i < (33 - length(wfn)) / 8; i++) 454 printf("\t") > sysent 455 printf("/* %d = %s%s */\n", syscall, compatwrap_, funcalias) > sysent 456 457 # output syscall name for names table 458 printf("\t/* %3d */\t\"%s%s\",\n", syscall, compatwrap_, funcalias) \ 459 > sysnamesbottom 460 461 # output syscall number of header, if appropriate 462 if (type == "STD" || type == "NOARGS" || type == "INDIR") { 463 # output a prototype, to be used to generate lint stubs in 464 # libc. 465 printproto("") 466 } else if (type == "COMPAT") { 467 # Just define the syscall number with a comment. These 468 # may be used by compatibility stubs in libc. 469 printproto(compatwrap_) 470 } 471 472 # output syscall argument structure, if it has arguments 473 if (argc != 0) { 474 printf("\nstruct %s%s_args", compatwrap_, funcname) > sysarghdr 475 if (type != "NOARGS") { 476 print " {" >sysarghdr; 477 for (i = 1; i <= argc; i++) 478 printf("\tsyscallarg(%s) %s;\n", argtype[i], 479 argname[i]) > sysarghdr 480 printf "}" >sysarghdr; 481 } 482 printf(";\n") > sysarghdr 483 if (type != "NOARGS" && type != "INDIR") { 484 printf("check_syscall_args(%s%s)\n", compatwrap_, 485 funcname) >sysarghdr 486 } 487 } 488 } 489 $2 == "STD" || $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" { 490 parseline() 491 putent($2, "") 492 syscall++ 493 next 494 } 495 $2 == "OBSOL" || $2 == "UNIMPL" || $2 == "EXCL" { 496 if ($2 == "OBSOL") 497 comment="obsolete" 498 else if ($2 == "EXCL") 499 comment="excluded" 500 else 501 comment="unimplemented" 502 for (i = 3; i <= NF; i++) 503 comment=comment " " $i 504 505 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = %s */\n", \ 506 sys_nosys, syscall, comment) > sysent 507 printf("\t/* %3d */\t\"#%d (%s)\",\n", syscall, syscall, comment) \ 508 > sysnamesbottom 509 if ($2 != "UNIMPL") 510 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr 511 syscall++ 512 next 513 } 514 { 515 for (i = 1; i <= ncompat; i++) { 516 if ($2 == compat_upper[i]) { 517 parseline(); 518 putent("COMPAT", compat[i]) 519 syscall++ 520 next 521 } 522 } 523 printf("%s: line %d: unrecognized keyword %s\n", infile, NR, $2) 524 exit 1 525 } 526 END { 527 maxsyscall = syscall 528 if (nsysent) { 529 if (syscall > nsysent) { 530 printf("%s: line %d: too many syscalls [%d > %d]\n", infile, NR, syscall, nsysent) 531 exit 1 532 } 533 while (syscall < nsysent) { 534 printf("\t{ 0, 0, 0,\n\t %s },\t\t\t/* %d = filler */\n", \ 535 sys_nosys, syscall) > sysent 536 syscall++ 537 } 538 } 539 printf("};\n\n") > sysent 540 printf("};\n") > sysnamesbottom 541 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, maxsyscall) > sysnumhdr 542 if (nsysent) 543 printf("#define\t%sNSYSENT\t%d\n", constprefix, nsysent) > sysnumhdr 544 } ' 545 546 cat $sysprotos >> $sysarghdr 547 echo "#endif /* _${constprefix}SYSCALL_H_ */" >> $sysnumhdr 548 echo "#endif /* _${constprefix}SYSCALLARGS_H_ */" >> $sysarghdr 549 cat $sysdcl $sysent > $syssw 550 cat $sysnamesbottom >> $sysnames 551 552 #chmod 444 $sysnames $sysnumhdr $syssw 553
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