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makesyscalls.sh revision 1.17 
      1 #! /bin/sh -
      2 #	$NetBSD: makesyscalls.sh,v 1.17 1995/10/07 06:28:31 mycroft Exp $
      3 #
      4 # Copyright (c) 1994 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 #
     57 # NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'.
     58 
     59 # tmp files:
     60 sysdcl="sysent.dcl"
     61 sysprotos="sys.protos"
     62 syscompat_pref="sysent."
     63 sysent="sysent.switch"
     64 
     65 trap "rm $sysdcl $sysprotos $sysent" 0
     66 
     67 # Awk program (must support nawk extensions)
     68 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
     69 awk=${AWK:-awk}
     70 
     71 # Does this awk have a "toupper" function? (i.e. is it GNU awk)
     72 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
     73 
     74 # If this awk does not define "toupper" then define our own.
     75 if [ "$isgawk" = TRUE ] ; then
     76 	# GNU awk provides it.
     77 	toupper=
     78 else
     79 	# Provide our own toupper()
     80 	toupper='
     81 function toupper(str) {
     82 	_toupper_cmd = "echo "str" |tr a-z A-Z"
     83 	_toupper_cmd | getline _toupper_str;
     84 	close(_toupper_cmd);
     85 	return _toupper_str;
     86 }'
     87 fi
     88 
     89 # before handing it off to awk, make a few adjustments:
     90 #	(1) insert spaces around {, }, (, ), *, and commas.
     91 #	(2) get rid of any and all dollar signs (so that rcs id use safe)
     92 #
     93 # The awk script will deal with blank lines and lines that
     94 # start with the comment character (';').
     95 
     96 sed -e '
     97 s/\$//g
     98 :join
     99 	/\\$/{a\
    100 
    101 	N
    102 	s/\\\n//
    103 	b join
    104 	}
    105 2,${
    106 	/^#/!s/\([{}()*,]\)/ \1 /g
    107 }
    108 ' < $2 | $awk "
    109 $toupper
    110 BEGIN {
    111 	sysnames = \"$sysnames\"
    112 	sysprotos = \"$sysprotos\"
    113 	sysnumhdr = \"$sysnumhdr\"
    114 	sysarghdr = \"$sysarghdr\"
    115 	switchname = \"$switchname\"
    116 	namesname = \"$namesname\"
    117 	constprefix = \"$constprefix\"
    118 
    119 	sysdcl = \"$sysdcl\"
    120 	syscompat_pref = \"$syscompat_pref\"
    121 	sysent = \"$sysent\"
    122 	infile = \"$2\"
    123 
    124 	compatopts = \"$compatopts\"
    125 	"'
    126 
    127 	printf "/*\n * System call switch table.\n *\n" > sysdcl
    128 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl
    129 
    130 	ncompat = split(compatopts,compat)
    131 	for (i = 1; i <= ncompat; i++) {
    132 		compat_upper[i] = toupper(compat[i])
    133 
    134 		printf "\n#ifdef %s\n", compat_upper[i] > sysent
    135 		printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \
    136 		    compat[i] > sysent
    137 		printf "#else\n" > sysent
    138 		printf "#define %s(func) sys_nosys\n", compat[i] > sysent
    139 		printf "#endif\n" > sysent
    140 	}
    141 
    142 	printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent
    143 	printf "struct sysent %s[] = {\n",switchname > sysent
    144 
    145 	printf "/*\n * System call names.\n *\n" > sysnames
    146 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
    147 
    148 	printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos
    149 
    150 	printf "/*\n * System call numbers.\n *\n" > sysnumhdr
    151 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr
    152 
    153 	printf "/*\n * System call argument lists.\n *\n" > sysarghdr
    154 	printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr
    155 }
    156 NR == 1 {
    157 	printf " * created from%s\n */\n\n", $0 > sysdcl
    158 
    159 	printf " * created from%s\n */\n\n", $0 > sysnames
    160 	printf "char *%s[] = {\n",namesname > sysnames
    161 
    162 	printf " * created from%s\n */\n\n", $0 > sysnumhdr
    163 
    164 	printf " * created from%s\n */\n\n", $0 > sysarghdr
    165 	printf "#define\tsyscallarg(x)\tunion { x datum; register_t pad; }\n" \
    166 		> sysarghdr
    167 	next
    168 }
    169 NF == 0 || $1 ~ /^;/ {
    170 	next
    171 }
    172 $1 ~ /^#[ 	]*include/ {
    173 	print > sysdcl
    174 	next
    175 }
    176 $1 ~ /^#[ 	]*if/ {
    177 	print > sysent
    178 	print > sysprotos
    179 	print > sysnames
    180 	savesyscall = syscall
    181 	next
    182 }
    183 $1 ~ /^#[ 	]*else/ {
    184 	print > sysent
    185 	print > sysprotos
    186 	print > sysnames
    187 	syscall = savesyscall
    188 	next
    189 }
    190 $1 ~ /^#/ {
    191 	print > sysent
    192 	print > sysprotos
    193 	print > sysnames
    194 	next
    195 }
    196 syscall != $1 {
    197 	printf "%s: line %d: syscall number out of sync at %d\n", \
    198 	   infile, NR, syscall
    199 	printf "line is:\n"
    200 	print
    201 	exit 1
    202 }
    203 function parserr(was, wanted) {
    204 	printf "%s: line %d: unexpected %s (expected %s)\n", \
    205 	    infile, NR, was, wanted
    206 	exit 1
    207 }
    208 function parseline() {
    209 	f=3			# toss number and type
    210 	if ($NF != "}") {
    211 		funcalias=$NF
    212 		end=NF-1
    213 	} else {
    214 		funcalias=""
    215 		end=NF
    216 	}
    217 	if ($f != "{")
    218 		parserr($f, "{")
    219 	f++
    220 	if ($end != "}")
    221 		parserr($end, "}")
    222 	end--
    223 	if ($end != ";")
    224 		parserr($end, ";")
    225 	end--
    226 	if ($end != ")")
    227 		parserr($end, ")")
    228 	end--
    229 
    230 	f++			# toss return type
    231 
    232 	funcname=$f
    233 	if (funcalias == "") {
    234 		funcalias=funcname
    235 		sub(/^([^_]+_)*sys_/, "", funcalias)
    236 	}
    237 	f++
    238 
    239 	if ($f != "(")
    240 		parserr($f, ")")
    241 	f++
    242 
    243 	argc= 0;
    244 	if (f == end) {
    245 		if ($f != "void")
    246 			parserr($f, "argument definition")
    247 		return
    248 	}
    249 
    250 	while (f <= end) {
    251 		argc++
    252 		argtype[argc]=""
    253 		oldf=""
    254 		while (f < end && $(f+1) != ",") {
    255 			if (argtype[argc] != "" && oldf != "*")
    256 				argtype[argc] = argtype[argc]" ";
    257 			argtype[argc] = argtype[argc]$f;
    258 			oldf = $f;
    259 			f++
    260 		}
    261 		if (argtype[argc] == "")
    262 			parserr($f, "argument definition")
    263 		argname[argc]=$f;
    264 		f += 2;			# skip name, and any comma
    265 	}
    266 }
    267 function putent(nodefs, compatwrap) {
    268 	# output syscall declaration for switch table
    269 	prototype = "__P((struct proc *, void *, register_t *))"
    270 	if (compatwrap == "")
    271 		printf("int\t%s\t%s;\n", funcname, prototype) > sysprotos
    272 	else
    273 		printf("int\t%s_%s\t%s;\n", compatwrap, funcname, prototype) > sysprotos
    274 
    275 	# output syscall switch entry
    276 #	printf("\t{ { %d", argc) > sysent
    277 #	for (i = 1; i <= argc; i++) {
    278 #		if (i == 5) 		# wrap the line
    279 #			printf(",\n\t    ") > sysent
    280 #		else
    281 #			printf(", ") > sysent
    282 #		printf("s(%s)", argtypenospc[i]) > sysent
    283 #	}
    284 	printf("\t{ %d, ", argc) > sysent
    285 	if (argc == 0)
    286 		printf("0") > sysent
    287 	else if (compatwrap == "")
    288 		printf("s(struct %s_args)", funcname) > sysent
    289 	else
    290 		printf("s(struct %s_%s_args)", compatwrap, funcname) > sysent
    291 	if (compatwrap == "")
    292 		wfn = sprintf("%s", funcname);
    293 	else
    294 		wfn = sprintf("%s(%s)", compatwrap, funcname);
    295 	printf(",\n\t    %s },", wfn) > sysent
    296 	for (i = 0; i < (33 - length(wfn)) / 8; i++)
    297 		printf("\t") > sysent
    298 	if (compatwrap == "")
    299 		printf("/* %d = %s */\n", syscall, funcalias) > sysent
    300 	else
    301 		printf("/* %d = %s %s */\n", syscall, compatwrap,
    302 		    funcalias) > sysent
    303 
    304 	# output syscall name for names table
    305 	if (compatwrap == "")
    306 		printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall,
    307 		    funcalias) > sysnames
    308 	else
    309 		printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap,
    310 		    funcalias, syscall, compatwrap, funcalias) > sysnames
    311 
    312 	# output syscall number of header, if appropriate
    313 	if (nodefs == "" || nodefs == "NOARGS")
    314 		printf("#define\t%s%s\t%d\n", constprefix, funcalias,
    315 		    syscall) > sysnumhdr
    316 	else if (nodefs != "NODEF")
    317 		printf("\t\t\t\t/* %d is %s %s */\n", syscall,
    318 		    compatwrap, funcalias) > sysnumhdr
    319 
    320 	# output syscall argument structure, if it has arguments
    321 	if (argc != 0 && nodefs != "NOARGS") {
    322 		if (compatwrap == "")
    323 			printf("\nstruct %s_args {\n", funcname) > sysarghdr
    324 		else
    325 			printf("\nstruct %s_%s_args {\n", compatwrap,
    326 			    funcname) > sysarghdr
    327 		for (i = 1; i <= argc; i++)
    328 			printf("\tsyscallarg(%s) %s;\n", argtype[i],
    329 			    argname[i]) > sysarghdr
    330 		printf("};\n") > sysarghdr
    331 	}
    332 }
    333 $2 == "STD" {
    334 	parseline()
    335 	putent("", "");
    336 	syscall++
    337 	next
    338 }
    339 $2 == "NODEF" || $2 == "NOARGS" {
    340 	parseline()
    341 	putent($2, "")
    342 	syscall++
    343 	next
    344 }
    345 $2 == "OBSOL" || $2 == "UNIMPL" {
    346 	if ($2 == "OBSOL")
    347 		comment="obsolete"
    348 	else
    349 		comment="unimplemented"
    350 	for (i = 3; i <= NF; i++)
    351 		comment=comment " " $i
    352 
    353 	printf("\t{ 0, 0,\n\t    sys_nosys },\t\t\t/* %d = %s */\n", \
    354 	    syscall, comment) > sysent
    355 	printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \
    356 	    syscall, comment, syscall, comment) > sysnames
    357 	if ($2 != "UNIMPL")
    358 		printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr
    359 	syscall++
    360 	next
    361 }
    362 {
    363 	for (i = 1; i <= ncompat; i++) {
    364 		if ($2 == compat_upper[i]) {
    365 			parseline();
    366 			putent("COMMENT", compat[i])
    367 			syscall++
    368 			next
    369 		}
    370 	}
    371 	printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
    372 	exit 1
    373 }
    374 END {
    375 	printf("};\n\n") > sysent
    376 	printf("};\n") > sysnames
    377 	printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, syscall) > sysnumhdr
    378 } '
    379 
    380 cat $sysprotos >> $sysarghdr
    381 cat $sysdcl $sysent > $syssw
    382 
    383 #chmod 444 $sysnames $sysnumhdr $syssw
    384