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makesyscalls.sh revision 1.30 
      1 #! /bin/sh -
      2 #	$NetBSD: makesyscalls.sh,v 1.30 1998/10/03 19:21:11 eeh Exp $
      3 #
      4 # Copyright (c) 1994,1996 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 'char *[]' we define
     55 #	constprefix	the prefix for the system call constants
     56 #	registertype	the type for register_t
     57 #
     58 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'.
     59 
     60 # tmp files:
     61 sysdcl="sysent.dcl"
     62 sysprotos="sys.protos"
     63 syscompat_pref="sysent."
     64 sysent="sysent.switch"
     65 sysnamesbottom="sysnames.bottom"
     66 
     67 trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0
     68 
     69 # Awk program (must support nawk extensions)
     70 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
     71 awk=${AWK:-awk}
     72 
     73 # Does this awk have a "toupper" function? (i.e. is it GNU awk)
     74 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
     75 
     76 # If this awk does not define "toupper" then define our own.
     77 if [ "$isgawk" = TRUE ] ; then
     78 	# GNU awk provides it.
     79 	toupper=
     80 else
     81 	# Provide our own toupper()
     82 	toupper='
     83 function toupper(str) {
     84 	_toupper_cmd = "echo "str" |tr a-z A-Z"
     85 	_toupper_cmd | getline _toupper_str;
     86 	close(_toupper_cmd);
     87 	return _toupper_str;
     88 }'
     89 fi
     90 
     91 # before handing it off to awk, make a few adjustments:
     92 #	(1) insert spaces around {, }, (, ), *, and commas.
     93 #	(2) get rid of any and all dollar signs (so that rcs id use safe)
     94 #
     95 # The awk script will deal with blank lines and lines that
     96 # start with the comment character (';').
     97 
     98 sed -e '
     99 s/\$//g
    100 :join
    101 	/\\$/{a\
    102 
    103 	N
    104 	s/\\\n//
    105 	b join
    106 	}
    107 2,${
    108 	/^#/!s/\([{}()*,]\)/ \1 /g
    109 }
    110 ' < $2 | $awk "
    111 $toupper
    112 BEGIN {
    113 	# to allow nested #if/#else/#endif sets
    114 	savedepth = 0
    115 
    116 	sysnames = \"$sysnames\"
    117 	sysprotos = \"$sysprotos\"
    118 	sysnumhdr = \"$sysnumhdr\"
    119 	sysarghdr = \"$sysarghdr\"
    120 	switchname = \"$switchname\"
    121 	namesname = \"$namesname\"
    122 	constprefix = \"$constprefix\"
    123 	registertype = \"$registertype\"
    124 	if (!registertype) {
    125 	    registertype = \"register_t\"
    126 	}
    127 
    128 	sysdcl = \"$sysdcl\"
    129 	syscompat_pref = \"$syscompat_pref\"
    130 	sysent = \"$sysent\"
    131 	sysnamesbottom = \"$sysnamesbottom\"
    132 	infile = \"$2\"
    133 
    134 	compatopts = \"$compatopts\"
    135 	"'
    136 
    137 	printf "/*\t\$NetBSD\$\t*/\n\n" > sysdcl
    138 	printf "/*\n * System call switch table.\n *\n" > sysdcl
    139 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl
    140 
    141 	ncompat = split(compatopts,compat)
    142 	for (i = 1; i <= ncompat; i++) {
    143 		compat_upper[i] = toupper(compat[i])
    144 
    145 		printf "\n#ifdef %s\n", compat_upper[i] > sysent
    146 		printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \
    147 		    compat[i] > sysent
    148 		printf "#else\n" > sysent
    149 		printf "#define %s(func) sys_nosys\n", compat[i] > sysent
    150 		printf "#endif\n" > sysent
    151 	}
    152 
    153 	printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent
    154 	printf "struct sysent %s[] = {\n",switchname > sysent
    155 
    156 	printf "/*\t\$NetBSD\$\t*/\n\n" > sysnames
    157 	printf "/*\n * System call names.\n *\n" > sysnames
    158 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
    159 
    160 	printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos
    161 
    162 	printf "/*\t\$NetBSD\$\t*/\n\n" > sysnumhdr
    163 	printf "/*\n * System call numbers.\n *\n" > sysnumhdr
    164 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr
    165 
    166 	printf "/*\t\$NetBSD\$\t*/\n\n" > sysarghdr
    167 	printf "/*\n * System call argument lists.\n *\n" > sysarghdr
    168 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr
    169 }
    170 NR == 1 {
    171 	printf " * created from%s\n */\n\n", $0 > sysdcl
    172 
    173 	printf " * created from%s\n */\n\n", $0 > sysnames
    174 
    175 	# System call names are included by userland (kdump(1)), so
    176 	# hide the include files from it.
    177 	printf "#if defined(_KERNEL) && !defined(_LKM)\n" > sysnames
    178 
    179 	printf "#endif /* _KERNEL && ! _LKM */\n\n" > sysnamesbottom
    180 	printf "char *%s[] = {\n",namesname > sysnamesbottom
    181 
    182 	printf " * created from%s\n */\n\n", $0 > sysnumhdr
    183 
    184 	printf " * created from%s\n */\n\n", $0 > sysarghdr
    185 	printf "#ifdef\tsyscallarg\n" > sysarghdr
    186 	printf "#undef\tsyscallarg\n" > sysarghdr
    187 	printf "#endif\n\n" > sysarghdr
    188 	printf "#define\tsyscallarg(x)\t\t\t\t\t\t\t\t\\\n" > sysarghdr
    189 	printf "\t\tunion {\t\t\t\t\t\t\t\t\\\n" > sysarghdr
    190 	printf "\t\t\t%s pad;\t\t\t\t\t\t\\\n", registertype > sysarghdr
    191 	printf "\t\t\tstruct { x datum; } le;\t\t\t\t\t\\\n" > sysarghdr
    192 	printf "\t\t\tstruct {\t\t\t\t\t\t\\\n" > sysarghdr
    193 	printf "\t\t\t\tint8_t pad[ (sizeof (%s) < sizeof (x))\t\\\n", \
    194 		registertype > sysarghdr
    195 	printf "\t\t\t\t\t? 0\t\t\t\t\t\\\n" > sysarghdr
    196 	printf "\t\t\t\t\t: sizeof (%s) - sizeof (x)];\t\\\n", \
    197 		registertype > sysarghdr
    198 	printf "\t\t\t\tx datum;\t\t\t\t\t\\\n" > sysarghdr
    199 	printf "\t\t\t} be;\t\t\t\t\t\t\t\\\n" > sysarghdr
    200 	printf "\t\t}\n" > sysarghdr
    201 	next
    202 }
    203 NF == 0 || $1 ~ /^;/ {
    204 	next
    205 }
    206 $1 ~ /^#[ 	]*include/ {
    207 	print > sysdcl
    208 	print > sysnames
    209 	next
    210 }
    211 $1 ~ /^#[ 	]*if/ {
    212 	print > sysent
    213 	print > sysprotos
    214 	print > sysnamesbottom
    215 	savesyscall[++savedepth] = syscall
    216 	next
    217 }
    218 $1 ~ /^#[ 	]*else/ {
    219 	print > sysent
    220 	print > sysprotos
    221 	print > sysnamesbottom
    222 	if (savedepth <= 0) {
    223 		printf "%s: line %d: unbalenced #else\n", \
    224 		    infile, NR
    225 		exit 1
    226 	}
    227 	syscall = savesyscall[savedepth]
    228 	next
    229 }
    230 $1 ~ /^#/ {
    231 	if ($1 ~ /^#[       ]*endif/) {
    232 		if (savedepth <= 0) {
    233 			printf "%s: line %d: unbalenced #endif\n", \
    234 			    infile, NR
    235 			exit 1
    236 		}
    237 		savedepth--;
    238 	}
    239 	print > sysent
    240 	print > sysprotos
    241 	print > sysnamesbottom
    242 	next
    243 }
    244 syscall != $1 {
    245 	printf "%s: line %d: syscall number out of sync at %d\n", \
    246 	   infile, NR, syscall
    247 	printf "line is:\n"
    248 	print
    249 	exit 1
    250 }
    251 function parserr(was, wanted) {
    252 	printf "%s: line %d: unexpected %s (expected %s)\n", \
    253 	    infile, NR, was, wanted
    254 	exit 1
    255 }
    256 function parseline() {
    257 	f=3			# toss number and type
    258 	if ($NF != "}") {
    259 		funcalias=$NF
    260 		end=NF-1
    261 	} else {
    262 		funcalias=""
    263 		end=NF
    264 	}
    265 	if ($f != "{")
    266 		parserr($f, "{")
    267 	f++
    268 	if ($end != "}")
    269 		parserr($end, "}")
    270 	end--
    271 	if ($end != ";")
    272 		parserr($end, ";")
    273 	end--
    274 	if ($end != ")")
    275 		parserr($end, ")")
    276 	end--
    277 
    278 	returntype = oldf = "";
    279 	do {
    280 		if (returntype != "" && oldf != "*")
    281 			returntype = returntype" ";
    282 		returntype = returntype$f;
    283 		oldf = $f;
    284 		f++
    285 	} while (f < (end - 1) && $(f+1) != "(");
    286 	if (f == (end - 1)) {
    287 		parserr($f, "function argument definition (maybe \"(\"?)");
    288 	}
    289 
    290 	funcname=$f
    291 	if (funcalias == "") {
    292 		funcalias=funcname
    293 		sub(/^([^_]+_)*sys_/, "", funcalias)
    294 	}
    295 	f++
    296 
    297 	if ($f != "(")
    298 		parserr($f, ")")
    299 	f++
    300 
    301 	argc=0;
    302 	if (f == end) {
    303 		if ($f != "void")
    304 			parserr($f, "argument definition")
    305 		isvarargs = 0;
    306 		varargc = 0;
    307 		return
    308 	}
    309 
    310 	# some system calls (open() and fcntl()) can accept a variable
    311 	# number of arguments.  If syscalls accept a variable number of
    312 	# arguments, they must still have arguments specified for
    313 	# the remaining argument "positions," because of the way the
    314 	# kernel system call argument handling works.
    315 	#
    316 	# Indirect system calls, e.g. syscall(), are exceptions to this
    317 	# rule, since they are handled entirely by machine-dependent code
    318 	# and do not need argument structures built.
    319 
    320 	isvarargs = 0;
    321 	while (f <= end) {
    322 		if ($f == "...") {
    323 			f++;
    324 			isvarargs = 1;
    325 			varargc = argc;
    326 			continue;
    327 		}
    328 		argc++
    329 		argtype[argc]=""
    330 		oldf=""
    331 		while (f < end && $(f+1) != ",") {
    332 			if (argtype[argc] != "" && oldf != "*")
    333 				argtype[argc] = argtype[argc]" ";
    334 			argtype[argc] = argtype[argc]$f;
    335 			oldf = $f;
    336 			f++
    337 		}
    338 		if (argtype[argc] == "")
    339 			parserr($f, "argument definition")
    340 		argname[argc]=$f;
    341 		f += 2;			# skip name, and any comma
    342 	}
    343 	# must see another argument after varargs notice.
    344 	if (isvarargs) {
    345 		if (argc == varargc && $2 != "INDIR")
    346 			parserr($f, "argument definition")
    347 	} else
    348 		varargc = argc;
    349 }
    350 function putent(nodefs, compatwrap) {
    351 	# output syscall declaration for switch table.  INDIR functions
    352 	# get none, since they always have sys_nosys() for their table
    353 	# entries.
    354 	if (nodefs != "INDIR") {
    355 		prototype = "__P((struct proc *, void *, register_t *))"
    356 		if (compatwrap == "")
    357 			printf("int\t%s\t%s;\n", funcname,
    358 			    prototype) > sysprotos
    359 		else
    360 			printf("int\t%s_%s\t%s;\n", compatwrap, funcname,
    361 			    prototype) > sysprotos
    362 	}
    363 
    364 	# output syscall switch entry
    365 	if (nodefs == "INDIR") {
    366 		printf("\t{ 0, 0,\n\t    sys_nosys },\t\t\t/* %d = %s (indir) */\n", \
    367 		    syscall, funcalias) > sysent
    368 	} else {
    369 #		printf("\t{ { %d", argc) > sysent
    370 #		for (i = 1; i <= argc; i++) {
    371 #			if (i == 5) 		# wrap the line
    372 #				printf(",\n\t    ") > sysent
    373 #			else
    374 #				printf(", ") > sysent
    375 #			printf("s(%s)", argtypenospc[i]) > sysent
    376 #		}
    377 		printf("\t{ %d, ", argc) > sysent
    378 		if (argc == 0)
    379 			printf("0") > sysent
    380 		else if (compatwrap == "")
    381 			printf("s(struct %s_args)", funcname) > sysent
    382 		else
    383 			printf("s(struct %s_%s_args)", compatwrap,
    384 			    funcname) > sysent
    385 		if (compatwrap == "")
    386 			wfn = sprintf("%s", funcname);
    387 		else
    388 			wfn = sprintf("%s(%s)", compatwrap, funcname);
    389 		printf(",\n\t    %s },", wfn) > sysent
    390 		for (i = 0; i < (33 - length(wfn)) / 8; i++)
    391 			printf("\t") > sysent
    392 		if (compatwrap == "")
    393 			printf("/* %d = %s */\n", syscall, funcalias) > sysent
    394 		else
    395 			printf("/* %d = %s %s */\n", syscall, compatwrap,
    396 			    funcalias) > sysent
    397 	}
    398 
    399 	# output syscall name for names table
    400 	if (compatwrap == "")
    401 		printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall,
    402 		    funcalias) > sysnamesbottom
    403 	else
    404 		printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap,
    405 		    funcalias, syscall, compatwrap, funcalias) > sysnamesbottom
    406 
    407 	# output syscall number of header, if appropriate
    408 	if (nodefs == "" || nodefs == "NOARGS" || nodefs == "INDIR") {
    409 		# output a prototype, to be used to generate lint stubs in
    410 		# libc.
    411 		printf("/* syscall: \"%s\" ret: \"%s\" args:", funcalias,
    412 		    returntype) > sysnumhdr
    413 		for (i = 1; i <= varargc; i++)
    414 			printf(" \"%s\"", argtype[i]) > sysnumhdr
    415 		if (isvarargs)
    416 			printf(" \"...\"") > sysnumhdr
    417 		printf(" */\n") > sysnumhdr
    418 
    419 		printf("#define\t%s%s\t%d\n\n", constprefix, funcalias,
    420 		    syscall) > sysnumhdr
    421 	} else if (nodefs == "COMPAT") {
    422 		# Just define the syscall number with a comment.  These
    423 		# may be used by compatibility stubs in libc.
    424 		printf("#define\t%s%s_%s\t%d\n\n",
    425 		    constprefix, compatwrap, funcalias, syscall) > sysnumhdr
    426 	} else if (nodefs != "NODEF")
    427 		printf("\t\t\t\t/* %d is %s %s */\n\n", syscall,
    428 		    compatwrap, funcalias) > sysnumhdr
    429 
    430 	# output syscall argument structure, if it has arguments
    431 	if (argc != 0 && nodefs != "NOARGS" && nodefs != "INDIR") {
    432 		if (compatwrap == "")
    433 			printf("\nstruct %s_args {\n", funcname) > sysarghdr
    434 		else
    435 			printf("\nstruct %s_%s_args {\n", compatwrap,
    436 			    funcname) > sysarghdr
    437 		for (i = 1; i <= argc; i++)
    438 			printf("\tsyscallarg(%s) %s;\n", argtype[i],
    439 			    argname[i]) > sysarghdr
    440 		printf("};\n") > sysarghdr
    441 	}
    442 }
    443 $2 == "STD" {
    444 	parseline()
    445 	putent("", "");
    446 	syscall++
    447 	next
    448 }
    449 $2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" {
    450 	parseline()
    451 	putent($2, "")
    452 	syscall++
    453 	next
    454 }
    455 $2 == "OBSOL" || $2 == "UNIMPL" {
    456 	if ($2 == "OBSOL")
    457 		comment="obsolete"
    458 	else
    459 		comment="unimplemented"
    460 	for (i = 3; i <= NF; i++)
    461 		comment=comment " " $i
    462 
    463 	printf("\t{ 0, 0,\n\t    sys_nosys },\t\t\t/* %d = %s */\n", \
    464 	    syscall, comment) > sysent
    465 	printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \
    466 	    syscall, comment, syscall, comment) > sysnamesbottom
    467 	if ($2 != "UNIMPL")
    468 		printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr
    469 	syscall++
    470 	next
    471 }
    472 {
    473 	for (i = 1; i <= ncompat; i++) {
    474 		if ($2 == compat_upper[i]) {
    475 			parseline();
    476 			putent("COMPAT", compat[i])
    477 			syscall++
    478 			next
    479 		}
    480 	}
    481 	printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
    482 	exit 1
    483 }
    484 END {
    485 	printf("};\n\n") > sysent
    486 	printf("};\n") > sysnamesbottom
    487 	printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, syscall) > sysnumhdr
    488 } '
    489 
    490 cat $sysprotos >> $sysarghdr
    491 cat $sysdcl $sysent > $syssw
    492 cat $sysnamesbottom >> $sysnames
    493 
    494 #chmod 444 $sysnames $sysnumhdr $syssw
    495