1#! /bin/sh - 2# $OpenBSD: makesyscalls.sh,v 1.22 2024/01/07 20:52:44 miod Exp $ 3# $NetBSD: makesyscalls.sh,v 1.26 1998/01/09 06:17:51 thorpej Exp $ 4# 5# Copyright (c) 1994,1996 Christopher G. Demetriou 6# All rights reserved. 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 3. All advertising materials mentioning features or use of this software 17# must display the following acknowledgement: 18# This product includes software developed for the NetBSD Project 19# by Christopher G. Demetriou. 20# 4. The name of the author may not be used to endorse or promote products 21# derived from this software without specific prior written permission 22# 23# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 34# @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93 35 36set -e 37 38case $# in 39 1) ;; 40 *) echo "Usage: $0 input-file" 1>&2 41 exit 1 42 ;; 43esac 44 45sysnames="syscalls.c" 46sysnumhdr="../sys/syscall.h" 47syssw="init_sysent.c" 48sysarghdr="../sys/syscallargs.h" 49 50# Any additions to the next line for options that are required for the 51# (new) kernel to boot an existing userland must be coordinated with 52# the snapshot builders 53compatopts="" 54 55switchname="sysent" 56namesname="syscallnames" 57constprefix="SYS_" 58 59# this script sets the following variables: 60# sysnames the syscall names file 61# sysnumhdr the syscall numbers file 62# syssw the syscall switch file 63# sysarghdr the syscall argument struct definitions 64# compatopts those syscall types that are for 'compat' syscalls 65# switchname the name for the 'const struct sysent' we define 66# namesname the name for the 'const char *const[]' we define 67# constprefix the prefix for the system call constants 68# 69# NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'. 70 71# tmp files: 72sysdcl="sysent.dcl" 73sysprotos="sys.protos" 74syscompat_pref="sysent." 75sysent="sysent.switch" 76 77trap "rm $sysdcl $sysprotos $sysent" 0 78 79# before handing it off to awk, make a few adjustments: 80# (1) insert spaces around {, }, (, ), *, and commas. 81# (2) get rid of any and all dollar signs (so that rcs id use safe) 82# 83# The awk script will deal with blank lines and lines that 84# start with the comment character (';'). 85 86sed -e ' 87s/\$//g 88:join 89 /\\$/{a\ 90 91 N 92 s/\\\n// 93 b join 94 } 952,${ 96 /^#/!s/\([{}()*,]\)/ \1 /g 97} 98' < $1 | awk " 99BEGIN { 100 # to allow nested #if/#else/#endif sets 101 savedepth = 0 102 103 sysnames = \"$sysnames\" 104 sysprotos = \"$sysprotos\" 105 sysnumhdr = \"$sysnumhdr\" 106 sysarghdr = \"$sysarghdr\" 107 switchname = \"$switchname\" 108 namesname = \"$namesname\" 109 constprefix = \"$constprefix\" 110 111 sysdcl = \"$sysdcl\" 112 syscompat_pref = \"$syscompat_pref\" 113 sysent = \"$sysent\" 114 infile = \"$1\" 115 116 compatopts = \"$compatopts\" 117 "' 118 119 printf "/*\t\$OpenBSD\$\t*/\n\n" > sysdcl 120 printf "/*\n * System call switch table.\n *\n" > sysdcl 121 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl 122 123 ncompat = split(compatopts,compat) 124 for (i = 1; i <= ncompat; i++) { 125 compat_upper[i] = toupper(compat[i]) 126 127 printf "\n#ifdef %s\n", compat_upper[i] > sysent 128 printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \ 129 compat[i] > sysent 130 printf "#else\n" > sysent 131 printf "#define %s(func) sys_nosys\n", compat[i] > sysent 132 printf "#endif\n" > sysent 133 } 134 135 printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent 136 printf "const struct sysent %s[] = {\n",switchname > sysent 137 138 printf "/*\t\$OpenBSD\$\t*/\n\n" > sysnames 139 printf "/*\n * System call names.\n *\n" > sysnames 140 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames 141 142 printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos 143 144 printf "/*\t\$OpenBSD\$\t*/\n\n" > sysnumhdr 145 printf "/*\n * System call numbers.\n *\n" > sysnumhdr 146 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr 147 148 printf "/*\t\$OpenBSD\$\t*/\n\n" > sysarghdr 149 printf "/*\n * System call argument lists.\n *\n" > sysarghdr 150 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr 151} 152NR == 1 { 153 printf " * created from%s\n */\n\n", $0 > sysdcl 154 155 printf " * created from%s\n */\n\n", $0 > sysnames 156 printf "const char *const %s[] = {\n",namesname > sysnames 157 158 printf " * created from%s\n */\n\n", $0 > sysnumhdr 159 160 printf " * created from%s\n */\n\n", $0 > sysarghdr 161 printf "#ifdef\tsyscallarg\n" > sysarghdr 162 printf "#undef\tsyscallarg\n" > sysarghdr 163 printf "#endif\n\n" > sysarghdr 164 printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\\\n" > sysarghdr 165 printf "\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr 166 printf "\t\tregister_t pad;\t\t\t\t\t\t\\\n" > sysarghdr 167 printf "\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr 168 printf "\t\tstruct {\t\t\t\t\t\t\\\n" > sysarghdr 169 printf "\t\t\tint8_t pad[ (sizeof (register_t) < sizeof (x))\t\\\n" \ 170 > sysarghdr 171 printf "\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr 172 printf "\t\t\t\t: sizeof (register_t) - sizeof (x)];\t\\\n" \ 173 > sysarghdr 174 printf "\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr 175 printf "\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr 176 printf "\t}\n" > sysarghdr 177 next 178} 179NF == 0 || $1 ~ /^;/ { 180 next 181} 182$1 ~ /^#[ ]*include/ { 183 print > sysdcl 184 next 185} 186$1 ~ /^#[ ]*if/ { 187 print > sysent 188 print > sysprotos 189 print > sysnames 190 savesyscall[++savedepth] = syscall 191 next 192} 193$1 ~ /^#[ ]*else/ { 194 print > sysent 195 print > sysprotos 196 print > sysnames 197 if (savedepth <= 0) { 198 printf "%s: line %d: unbalanced #else\n", \ 199 infile, NR 200 exit 1 201 } 202 syscall = savesyscall[savedepth] 203 next 204} 205$1 ~ /^#/ { 206 if ($1 ~ /^#[ ]*endif/) { 207 if (savedepth <= 0) { 208 printf "%s: line %d: unbalanced #endif\n", \ 209 infile, NR 210 exit 1 211 } 212 savedepth--; 213 } 214 print > sysent 215 print > sysprotos 216 print > sysnames 217 next 218} 219syscall != $1 { 220 printf "%s: line %d: syscall number out of sync at %d\n", \ 221 infile, NR, syscall 222 printf "line is:\n" 223 print 224 exit 1 225} 226function parserr(was, wanted) { 227 printf "%s: line %d: unexpected %s (expected %s)\n", \ 228 infile, NR, was, wanted 229 exit 1 230} 231function parseline() { 232 f=3 # toss number and type 233 sycall_flags="0" 234 if ($NF != "}") { 235 funcalias=$NF 236 end=NF-1 237 } else { 238 funcalias="" 239 end=NF 240 } 241 if ($f == "NOLOCK") { # syscall does not need locks 242 sycall_flags = sprintf("SY_NOLOCK | %s", sycall_flags) 243 f++ 244 } 245 if ($f ~ /^[a-z0-9_]*$/) { # allow syscall alias 246 funcalias=$f 247 f++ 248 } 249 if ($f != "{") 250 parserr($f, "{") 251 f++ 252 if ($end != "}") 253 parserr($end, "}") 254 end-- 255 if ($end != ";") 256 parserr($end, ";") 257 end-- 258 if ($end != ")") 259 parserr($end, ")") 260 end-- 261 262 returntype = oldf = ""; 263 do { 264 if (returntype != "" && oldf != "*") 265 returntype = returntype" "; 266 returntype = returntype$f; 267 oldf = $f; 268 f++ 269 } while (f < (end - 1) && $(f+1) != "("); 270 if (f == (end - 1)) { 271 parserr($f, "function argument definition (maybe \"(\"?)"); 272 } 273 274 funcname=$f 275 if (funcalias == "") { 276 funcalias=funcname 277 sub(/^([^_]+_)*sys_/, "", funcalias) 278 } 279 f++ 280 281 if ($f != "(") 282 parserr($f, ")") 283 f++ 284 285 argc=0; 286 if (f == end) { 287 if ($f != "void") 288 parserr($f, "argument definition") 289 isvarargs = 0; 290 varargc = 0; 291 return 292 } 293 294 # some system calls (open() and fcntl()) can accept a variable 295 # number of arguments. If syscalls accept a variable number of 296 # arguments, they must still have arguments specified for 297 # the remaining argument "positions," because of the way the 298 # kernel system call argument handling works. 299 300 isvarargs = 0; 301 while (f <= end) { 302 if ($f == "...") { 303 f++; 304 isvarargs = 1; 305 varargc = argc; 306 continue; 307 } 308 argc++ 309 argtype[argc]="" 310 oldf="" 311 while (f < end && $(f+1) != ",") { 312 if (argtype[argc] != "" && oldf != "*") 313 argtype[argc] = argtype[argc]" "; 314 argtype[argc] = argtype[argc]$f; 315 oldf = $f; 316 f++ 317 } 318 if (argtype[argc] == "") 319 parserr($f, "argument definition") 320 argname[argc]=$f; 321 f += 2; # skip name, and any comma 322 } 323 # must see another argument after varargs notice. 324 if (isvarargs) { 325 if (argc == varargc) 326 parserr($f, "argument definition") 327 } else 328 varargc = argc; 329 if (argc > 6) { 330 printf "%s: line %d: too many syscall arguments (%d > 6)\n", \ 331 infile, NR, argc 332 exit 1 333 } 334} 335function putent(nodefs, compatwrap) { 336 # output syscall declaration for switch table. 337 prototype = "(struct proc *, void *, register_t *)" 338 if (compatwrap == "") 339 printf("int\t%s%s;\n", funcname, 340 prototype) > sysprotos 341 else 342 printf("int\t%s_%s%s;\n", compatwrap, funcname, 343 prototype) > sysprotos 344 345 # output syscall switch entry 346# printf("\t{ { %d", argc) > sysent 347# for (i = 1; i <= argc; i++) { 348# if (i == 5) # wrap the line 349# printf(",\n\t ") > sysent 350# else 351# printf(", ") > sysent 352# printf("s(%s)", argtypenospc[i]) > sysent 353# } 354 printf("\t{ %d, ", argc) > sysent 355 if (argc == 0) 356 printf("0") > sysent 357 else if (compatwrap == "") 358 printf("s(struct %s_args)", funcname) > sysent 359 else 360 printf("s(struct %s_%s_args)", compatwrap, 361 funcname) > sysent 362 if (compatwrap == "") 363 wfn = sprintf("%s", funcname); 364 else 365 wfn = sprintf("%s(%s)", compatwrap, funcname); 366 printf(", %s,\n\t %s },", sycall_flags, wfn) > sysent 367 for (i = 0; i < (33 - length(wfn)) / 8; i++) 368 printf("\t") > sysent 369 if (compatwrap == "") 370 printf("/* %d = %s */\n", syscall, funcalias) > sysent 371 else 372 printf("/* %d = %s %s */\n", syscall, compatwrap, 373 funcalias) > sysent 374 375 # output syscall name for names table 376 if (compatwrap == "") 377 printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall, 378 funcalias) > sysnames 379 else 380 printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap, 381 funcalias, syscall, compatwrap, funcalias) > sysnames 382 383 # output syscall number of header, if appropriate 384 if (nodefs == "" || nodefs == "NOARGS") { 385 # output a prototype, to be used to generate lint stubs in 386 # libc. 387 printf("/* syscall: \"%s\" ret: \"%s\" args:", funcalias, 388 returntype) > sysnumhdr 389 for (i = 1; i <= varargc; i++) 390 printf(" \"%s\"", argtype[i]) > sysnumhdr 391 if (isvarargs) { 392 printf(" \"...\"") > sysnumhdr 393 for (i = varargc + 1; i <= argc; i++) 394 printf(" \"%s\"", argtype[i]) > sysnumhdr 395 } 396 printf(" */\n") > sysnumhdr 397 398 printf("#define\t%s%s\t%d\n\n", constprefix, funcalias, 399 syscall) > sysnumhdr 400 } else if (nodefs != "NODEF") 401 printf("\t\t\t\t/* %d is %s %s */\n\n", syscall, 402 compatwrap, funcalias) > sysnumhdr 403 404 # output syscall argument structure, if it has arguments 405 if (argc != 0 && nodefs != "NOARGS") { 406 if (compatwrap == "") 407 printf("\nstruct %s_args {\n", funcname) > sysarghdr 408 else 409 printf("\nstruct %s_%s_args {\n", compatwrap, 410 funcname) > sysarghdr 411 for (i = 1; i <= argc; i++) 412 printf("\tsyscallarg(%s) %s;\n", argtype[i], 413 argname[i]) > sysarghdr 414 printf("};\n") > sysarghdr 415 } 416} 417$2 == "STD" { 418 parseline() 419 putent("", ""); 420 syscall++ 421 next 422} 423$2 == "NODEF" || $2 == "NOARGS" { 424 parseline() 425 putent($2, "") 426 syscall++ 427 next 428} 429$2 == "OBSOL" || $2 == "UNIMPL" { 430 if ($2 == "OBSOL") 431 comment="obsolete" 432 else 433 comment="unimplemented" 434 for (i = 3; i <= NF; i++) 435 comment=comment " " $i 436 437 printf("\t{ 0, 0, 0,\n\t sys_nosys },\t\t\t/* %d = %s */\n", \ 438 syscall, comment) > sysent 439 printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \ 440 syscall, comment, syscall, comment) > sysnames 441 if ($2 != "UNIMPL") 442 printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr 443 syscall++ 444 next 445} 446{ 447 for (i = 1; i <= ncompat; i++) { 448 if ($2 == compat_upper[i]) { 449 parseline(); 450 putent("COMMENT", compat[i]) 451 syscall++ 452 next 453 } 454 } 455 printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2 456 exit 1 457} 458END { 459 printf("};\n\n") > sysent 460 printf("};\n") > sysnames 461 printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, syscall) > sysnumhdr 462} ' 463 464cat $sysprotos >> $sysarghdr 465cat $sysdcl $sysent > $syssw 466 467#chmod 444 $sysnames $sysnumhdr $syssw 468