476 lines
13 KiB
Bash
476 lines
13 KiB
Bash
#! /bin/sh -
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# $NetBSD: makesyscalls.sh,v 1.29 1998/09/13 04:57:24 thorpej Exp $
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#
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# Copyright (c) 1994,1996 Christopher G. Demetriou
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed for the NetBSD Project
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# by Christopher G. Demetriou.
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# 4. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93
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set -e
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case $# in
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2) ;;
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*) echo "Usage: $0 config-file input-file" 1>&2
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exit 1
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;;
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esac
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# source the config file.
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. $1
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# the config file sets the following variables:
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# sysnames the syscall names file
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# sysnumhdr the syscall numbers file
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# syssw the syscall switch file
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# sysarghdr the syscall argument struct definitions
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# compatopts those syscall types that are for 'compat' syscalls
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# switchname the name for the 'struct sysent' we define
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# namesname the name for the 'char *[]' we define
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# constprefix the prefix for the system call constants
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#
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# NOTE THAT THIS makesyscalls.sh DOES NOT SUPPORT 'LIBCOMPAT'.
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# tmp files:
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sysdcl="sysent.dcl"
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sysprotos="sys.protos"
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syscompat_pref="sysent."
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sysent="sysent.switch"
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sysnamesbottom="sysnames.bottom"
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trap "rm $sysdcl $sysprotos $sysent $sysnamesbottom" 0
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# Awk program (must support nawk extensions)
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# Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
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awk=${AWK:-awk}
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# Does this awk have a "toupper" function? (i.e. is it GNU awk)
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isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
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# If this awk does not define "toupper" then define our own.
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if [ "$isgawk" = TRUE ] ; then
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# GNU awk provides it.
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toupper=
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else
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# Provide our own toupper()
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toupper='
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function toupper(str) {
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_toupper_cmd = "echo "str" |tr a-z A-Z"
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_toupper_cmd | getline _toupper_str;
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close(_toupper_cmd);
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return _toupper_str;
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}'
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fi
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# before handing it off to awk, make a few adjustments:
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# (1) insert spaces around {, }, (, ), *, and commas.
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# (2) get rid of any and all dollar signs (so that rcs id use safe)
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#
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# The awk script will deal with blank lines and lines that
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# start with the comment character (';').
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sed -e '
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s/\$//g
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:join
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/\\$/{a\
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N
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s/\\\n//
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b join
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}
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2,${
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/^#/!s/\([{}()*,]\)/ \1 /g
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}
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' < $2 | $awk "
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$toupper
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BEGIN {
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# to allow nested #if/#else/#endif sets
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savedepth = 0
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sysnames = \"$sysnames\"
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sysprotos = \"$sysprotos\"
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sysnumhdr = \"$sysnumhdr\"
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sysarghdr = \"$sysarghdr\"
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switchname = \"$switchname\"
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namesname = \"$namesname\"
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constprefix = \"$constprefix\"
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sysdcl = \"$sysdcl\"
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syscompat_pref = \"$syscompat_pref\"
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sysent = \"$sysent\"
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sysnamesbottom = \"$sysnamesbottom\"
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infile = \"$2\"
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compatopts = \"$compatopts\"
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"'
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printf "/*\t\$NetBSD\$\t*/\n\n" > sysdcl
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printf "/*\n * System call switch table.\n *\n" > sysdcl
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl
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ncompat = split(compatopts,compat)
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for (i = 1; i <= ncompat; i++) {
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compat_upper[i] = toupper(compat[i])
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printf "\n#ifdef %s\n", compat_upper[i] > sysent
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printf "#define %s(func) __CONCAT(%s_,func)\n", compat[i], \
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compat[i] > sysent
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printf "#else\n" > sysent
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printf "#define %s(func) sys_nosys\n", compat[i] > sysent
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printf "#endif\n" > sysent
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}
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printf "\n#define\ts(type)\tsizeof(type)\n\n" > sysent
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printf "struct sysent %s[] = {\n",switchname > sysent
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printf "/*\t\$NetBSD\$\t*/\n\n" > sysnames
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printf "/*\n * System call names.\n *\n" > sysnames
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
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printf "\n/*\n * System call prototypes.\n */\n\n" > sysprotos
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printf "/*\t\$NetBSD\$\t*/\n\n" > sysnumhdr
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printf "/*\n * System call numbers.\n *\n" > sysnumhdr
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnumhdr
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printf "/*\t\$NetBSD\$\t*/\n\n" > sysarghdr
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printf "/*\n * System call argument lists.\n *\n" > sysarghdr
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarghdr
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}
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NR == 1 {
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printf " * created from%s\n */\n\n", $0 > sysdcl
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printf " * created from%s\n */\n\n", $0 > sysnames
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# System call names are included by userland (kdump(1)), so
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# hide the include files from it.
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printf "#if defined(_KERNEL) && !defined(_LKM)\n" > sysnames
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printf "#endif /* _KERNEL && ! _LKM */\n\n" > sysnamesbottom
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printf "char *%s[] = {\n",namesname > sysnamesbottom
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printf " * created from%s\n */\n\n", $0 > sysnumhdr
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printf " * created from%s\n */\n\n", $0 > sysarghdr
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printf "#define\tsyscallarg(x)\tunion { x datum; register_t pad; }\n" \
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> sysarghdr
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next
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}
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NF == 0 || $1 ~ /^;/ {
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next
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}
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$1 ~ /^#[ ]*include/ {
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print > sysdcl
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print > sysnames
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next
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}
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$1 ~ /^#[ ]*if/ {
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print > sysent
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print > sysprotos
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print > sysnamesbottom
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savesyscall[++savedepth] = syscall
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next
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}
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$1 ~ /^#[ ]*else/ {
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print > sysent
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print > sysprotos
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print > sysnamesbottom
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if (savedepth <= 0) {
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printf "%s: line %d: unbalenced #else\n", \
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infile, NR
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exit 1
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}
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syscall = savesyscall[savedepth]
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next
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}
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$1 ~ /^#/ {
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if ($1 ~ /^#[ ]*endif/) {
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if (savedepth <= 0) {
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printf "%s: line %d: unbalenced #endif\n", \
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infile, NR
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exit 1
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}
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savedepth--;
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}
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print > sysent
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print > sysprotos
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print > sysnamesbottom
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next
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}
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syscall != $1 {
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printf "%s: line %d: syscall number out of sync at %d\n", \
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infile, NR, syscall
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printf "line is:\n"
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print
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exit 1
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}
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function parserr(was, wanted) {
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printf "%s: line %d: unexpected %s (expected %s)\n", \
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infile, NR, was, wanted
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exit 1
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}
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function parseline() {
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f=3 # toss number and type
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if ($NF != "}") {
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funcalias=$NF
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end=NF-1
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} else {
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funcalias=""
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end=NF
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}
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if ($f != "{")
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parserr($f, "{")
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f++
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if ($end != "}")
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parserr($end, "}")
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end--
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if ($end != ";")
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parserr($end, ";")
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end--
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if ($end != ")")
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parserr($end, ")")
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end--
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returntype = oldf = "";
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do {
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if (returntype != "" && oldf != "*")
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returntype = returntype" ";
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returntype = returntype$f;
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oldf = $f;
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f++
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} while (f < (end - 1) && $(f+1) != "(");
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if (f == (end - 1)) {
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parserr($f, "function argument definition (maybe \"(\"?)");
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}
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funcname=$f
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if (funcalias == "") {
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funcalias=funcname
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sub(/^([^_]+_)*sys_/, "", funcalias)
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}
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f++
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if ($f != "(")
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parserr($f, ")")
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f++
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argc=0;
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if (f == end) {
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if ($f != "void")
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parserr($f, "argument definition")
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isvarargs = 0;
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varargc = 0;
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return
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}
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# some system calls (open() and fcntl()) can accept a variable
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# number of arguments. If syscalls accept a variable number of
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# arguments, they must still have arguments specified for
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# the remaining argument "positions," because of the way the
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# kernel system call argument handling works.
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#
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# Indirect system calls, e.g. syscall(), are exceptions to this
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# rule, since they are handled entirely by machine-dependent code
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# and do not need argument structures built.
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isvarargs = 0;
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while (f <= end) {
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if ($f == "...") {
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f++;
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isvarargs = 1;
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varargc = argc;
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continue;
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}
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argc++
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argtype[argc]=""
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oldf=""
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while (f < end && $(f+1) != ",") {
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if (argtype[argc] != "" && oldf != "*")
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argtype[argc] = argtype[argc]" ";
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argtype[argc] = argtype[argc]$f;
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oldf = $f;
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f++
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}
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if (argtype[argc] == "")
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parserr($f, "argument definition")
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argname[argc]=$f;
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f += 2; # skip name, and any comma
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}
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# must see another argument after varargs notice.
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if (isvarargs) {
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if (argc == varargc && $2 != "INDIR")
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parserr($f, "argument definition")
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} else
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varargc = argc;
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}
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function putent(nodefs, compatwrap) {
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# output syscall declaration for switch table. INDIR functions
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# get none, since they always have sys_nosys() for their table
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# entries.
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if (nodefs != "INDIR") {
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prototype = "__P((struct proc *, void *, register_t *))"
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if (compatwrap == "")
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printf("int\t%s\t%s;\n", funcname,
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prototype) > sysprotos
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else
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printf("int\t%s_%s\t%s;\n", compatwrap, funcname,
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prototype) > sysprotos
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}
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# output syscall switch entry
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if (nodefs == "INDIR") {
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printf("\t{ 0, 0,\n\t sys_nosys },\t\t\t/* %d = %s (indir) */\n", \
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syscall, funcalias) > sysent
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} else {
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# printf("\t{ { %d", argc) > sysent
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# for (i = 1; i <= argc; i++) {
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# if (i == 5) # wrap the line
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# printf(",\n\t ") > sysent
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# else
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# printf(", ") > sysent
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# printf("s(%s)", argtypenospc[i]) > sysent
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# }
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printf("\t{ %d, ", argc) > sysent
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if (argc == 0)
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printf("0") > sysent
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else if (compatwrap == "")
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printf("s(struct %s_args)", funcname) > sysent
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else
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printf("s(struct %s_%s_args)", compatwrap,
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funcname) > sysent
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if (compatwrap == "")
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wfn = sprintf("%s", funcname);
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else
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wfn = sprintf("%s(%s)", compatwrap, funcname);
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printf(",\n\t %s },", wfn) > sysent
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for (i = 0; i < (33 - length(wfn)) / 8; i++)
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printf("\t") > sysent
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if (compatwrap == "")
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printf("/* %d = %s */\n", syscall, funcalias) > sysent
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else
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printf("/* %d = %s %s */\n", syscall, compatwrap,
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funcalias) > sysent
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}
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# output syscall name for names table
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if (compatwrap == "")
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printf("\t\"%s\",\t\t\t/* %d = %s */\n", funcalias, syscall,
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funcalias) > sysnamesbottom
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else
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printf("\t\"%s_%s\",\t/* %d = %s %s */\n", compatwrap,
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funcalias, syscall, compatwrap, funcalias) > sysnamesbottom
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# output syscall number of header, if appropriate
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if (nodefs == "" || nodefs == "NOARGS" || nodefs == "INDIR") {
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# output a prototype, to be used to generate lint stubs in
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# libc.
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printf("/* syscall: \"%s\" ret: \"%s\" args:", funcalias,
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returntype) > sysnumhdr
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for (i = 1; i <= varargc; i++)
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printf(" \"%s\"", argtype[i]) > sysnumhdr
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if (isvarargs)
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printf(" \"...\"") > sysnumhdr
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printf(" */\n") > sysnumhdr
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printf("#define\t%s%s\t%d\n\n", constprefix, funcalias,
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syscall) > sysnumhdr
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} else if (nodefs == "COMPAT") {
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# Just define the syscall number with a comment. These
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# may be used by compatibility stubs in libc.
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printf("#define\t%s%s_%s\t%d\n\n",
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constprefix, compatwrap, funcalias, syscall) > sysnumhdr
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} else if (nodefs != "NODEF")
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printf("\t\t\t\t/* %d is %s %s */\n\n", syscall,
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compatwrap, funcalias) > sysnumhdr
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# output syscall argument structure, if it has arguments
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if (argc != 0 && nodefs != "NOARGS" && nodefs != "INDIR") {
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if (compatwrap == "")
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printf("\nstruct %s_args {\n", funcname) > sysarghdr
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else
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printf("\nstruct %s_%s_args {\n", compatwrap,
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funcname) > sysarghdr
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for (i = 1; i <= argc; i++)
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printf("\tsyscallarg(%s) %s;\n", argtype[i],
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argname[i]) > sysarghdr
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printf("};\n") > sysarghdr
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}
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}
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$2 == "STD" {
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parseline()
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putent("", "");
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syscall++
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next
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}
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$2 == "NODEF" || $2 == "NOARGS" || $2 == "INDIR" {
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parseline()
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putent($2, "")
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syscall++
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next
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}
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$2 == "OBSOL" || $2 == "UNIMPL" {
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if ($2 == "OBSOL")
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comment="obsolete"
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else
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comment="unimplemented"
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for (i = 3; i <= NF; i++)
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comment=comment " " $i
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printf("\t{ 0, 0,\n\t sys_nosys },\t\t\t/* %d = %s */\n", \
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syscall, comment) > sysent
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printf("\t\"#%d (%s)\",\t\t/* %d = %s */\n", \
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syscall, comment, syscall, comment) > sysnamesbottom
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if ($2 != "UNIMPL")
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printf("\t\t\t\t/* %d is %s */\n", syscall, comment) > sysnumhdr
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syscall++
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next
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}
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{
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for (i = 1; i <= ncompat; i++) {
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if ($2 == compat_upper[i]) {
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parseline();
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putent("COMPAT", compat[i])
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syscall++
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next
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}
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}
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printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
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exit 1
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}
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END {
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printf("};\n\n") > sysent
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printf("};\n") > sysnamesbottom
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printf("#define\t%sMAXSYSCALL\t%d\n", constprefix, syscall) > sysnumhdr
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} '
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cat $sysprotos >> $sysarghdr
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cat $sysdcl $sysent > $syssw
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cat $sysnamesbottom >> $sysnames
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#chmod 444 $sysnames $sysnumhdr $syssw
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