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freebsd-dev/sys/kern/makesyscalls.sh
John Birrell e994ea8e55 Generate another function for the DTrace syscall provider to specify 
the syscall argument types.

This code is only compiled into the systrace kernel modul and has no
effect otherwise.
2008-03-27 01:53:44 +00:00

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#! /bin/sh -
# @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93
# $FreeBSD$
set -e
# name of compat options:
compat=COMPAT_43
compat4=COMPAT_FREEBSD4
compat6=COMPAT_FREEBSD6
# output files:
sysnames="syscalls.c"
sysproto="../sys/sysproto.h"
sysproto_h=_SYS_SYSPROTO_H_
syshdr="../sys/syscall.h"
sysmk="../sys/syscall.mk"
syssw="init_sysent.c"
syscallprefix="SYS_"
switchname="sysent"
namesname="syscallnames"
systrace="systrace_args.c"
# tmp files:
sysaue="sysent.aue.$$"
sysdcl="sysent.dcl.$$"
syscompat="sysent.compat.$$"
syscompatdcl="sysent.compatdcl.$$"
syscompat4="sysent.compat4.$$"
syscompat4dcl="sysent.compat4dcl.$$"
syscompat6="sysent.compat6.$$"
syscompat6dcl="sysent.compat6dcl.$$"
sysent="sysent.switch.$$"
sysinc="sysinc.switch.$$"
sysarg="sysarg.switch.$$"
sysprotoend="sysprotoend.$$"
systracetmp="systrace.$$"
trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp" 0
touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp
case $# in
0) echo "usage: $0 input-file <config-file>" 1>&2
exit 1
;;
esac
if [ -n "$2" -a -f "$2" ]; then
. $2
fi
sed -e '
s/\$//g
:join
/\\$/{a\
N
s/\\\n//
b join
}
2,${
/^#/!s/\([{}()*,]\)/ \1 /g
}
' < $1 | awk "
BEGIN {
sysaue = \"$sysaue\"
sysdcl = \"$sysdcl\"
sysproto = \"$sysproto\"
sysprotoend = \"$sysprotoend\"
sysproto_h = \"$sysproto_h\"
syscompat = \"$syscompat\"
syscompatdcl = \"$syscompatdcl\"
syscompat4 = \"$syscompat4\"
syscompat4dcl = \"$syscompat4dcl\"
syscompat6 = \"$syscompat6\"
syscompat6dcl = \"$syscompat6dcl\"
sysent = \"$sysent\"
syssw = \"$syssw\"
sysinc = \"$sysinc\"
sysarg = \"$sysarg\"
sysnames = \"$sysnames\"
syshdr = \"$syshdr\"
sysmk = \"$sysmk\"
systrace = \"$systrace\"
systracetmp = \"$systracetmp\"
compat = \"$compat\"
compat4 = \"$compat4\"
compat6 = \"$compat6\"
syscallprefix = \"$syscallprefix\"
switchname = \"$switchname\"
namesname = \"$namesname\"
infile = \"$1\"
"'
printf "/*\n * System call switch table.\n *\n" > syssw
printf " * DO NOT EDIT-- this file is automatically generated.\n" > syssw
printf " * $%s$\n", "FreeBSD" > syssw
printf "/*\n * System call prototypes.\n *\n" > sysarg
printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarg
printf " * $%s$\n", "FreeBSD" > sysarg
printf "\n#ifdef %s\n\n", compat > syscompat
printf "\n#ifdef %s\n\n", compat4 > syscompat4
printf "\n#ifdef %s\n\n", compat6 > syscompat6
printf "/*\n * System call names.\n *\n" > sysnames
printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
printf " * $%s$\n", "FreeBSD" > sysnames
printf "/*\n * System call numbers.\n *\n" > syshdr
printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
printf " * $%s$\n", "FreeBSD" > syshdr
printf "# FreeBSD system call names.\n" > sysmk
printf "# DO NOT EDIT-- this file is automatically generated.\n" > sysmk
printf "# $%s$\n", "FreeBSD" > sysmk
printf "/*\n * System call argument to DTrace register array converstion.\n *\n" > systrace
printf " * DO NOT EDIT-- this file is automatically generated.\n" > systrace
printf " * $%s$\n", "FreeBSD" > systrace
}
NR == 1 {
gsub("[$]FreeBSD: ", "", $0)
gsub(" [$]", "", $0)
printf " * created from%s\n */\n\n", $0 > syssw
printf "\n/* The casts are bogus but will do for now. */\n" > sysent
printf "struct sysent %s[] = {\n",switchname > sysent
printf " * created from%s\n */\n\n", $0 > sysarg
printf "#ifndef %s\n", sysproto_h > sysarg
printf "#define\t%s\n\n", sysproto_h > sysarg
printf "#include <sys/signal.h>\n" > sysarg
printf "#include <sys/acl.h>\n" > sysarg
printf "#include <sys/cpuset.h>\n" > sysarg
printf "#include <sys/_semaphore.h>\n" > sysarg
printf "#include <sys/ucontext.h>\n\n" > sysarg
printf "#include <bsm/audit_kevents.h>\n\n" > sysarg
printf "struct proc;\n\n" > sysarg
printf "struct thread;\n\n" > sysarg
printf "#define\tPAD_(t)\t(sizeof(register_t) <= sizeof(t) ? \\\n" > sysarg
printf "\t\t0 : sizeof(register_t) - sizeof(t))\n\n" > sysarg
printf "#if BYTE_ORDER == LITTLE_ENDIAN\n"> sysarg
printf "#define\tPADL_(t)\t0\n" > sysarg
printf "#define\tPADR_(t)\tPAD_(t)\n" > sysarg
printf "#else\n" > sysarg
printf "#define\tPADL_(t)\tPAD_(t)\n" > sysarg
printf "#define\tPADR_(t)\t0\n" > sysarg
printf "#endif\n\n" > sysarg
printf " * created from%s\n */\n\n", $0 > sysnames
printf "const char *%s[] = {\n", namesname > sysnames
printf " * created from%s\n */\n\n", $0 > syshdr
printf "# created from%s\nMIASM = ", $0 > sysmk
printf " * This file is part of the DTrace syscall provider.\n */\n\n" > systrace
printf "static void\nsystrace_args(int sysnum, void *params, u_int64_t *uarg, int *n_args)\n{\n" > systrace
printf "\tint64_t *iarg = (int64_t *) uarg;\n" > systrace
printf "\tswitch (sysnum) {\n" > systrace
printf "static void\nsystrace_setargdesc(int sysnum, int ndx, char *desc, size_t descsz)\n{\n\tconst char *p = NULL;\n" > systracetmp
printf "\tswitch (sysnum) {\n" > systracetmp
next
}
NF == 0 || $1 ~ /^;/ {
next
}
$1 ~ /^#[ ]*include/ {
print > sysinc
next
}
$1 ~ /^#[ ]*if/ {
print > sysent
print > sysdcl
print > sysarg
print > syscompat
print > syscompat4
print > syscompat6
print > sysnames
savesyscall = syscall
next
}
$1 ~ /^#[ ]*else/ {
print > sysent
print > sysdcl
print > sysarg
print > syscompat
print > syscompat4
print > syscompat6
print > sysnames
syscall = savesyscall
next
}
$1 ~ /^#/ {
print > sysent
print > sysdcl
print > sysarg
print > syscompat
print > syscompat4
print > syscompat6
print > sysnames
next
}
syscall != $1 {
printf "%s: line %d: syscall number out of sync at %d\n",
infile, NR, syscall
printf "line is:\n"
print
exit 1
}
function align_sysent_comment(column) {
printf("\t") > sysent
column = column + 8 - column % 8
while (column < 56) {
printf("\t") > sysent
column = column + 8
}
}
function parserr(was, wanted) {
printf "%s: line %d: unexpected %s (expected %s)\n",
infile, NR, was, wanted
exit 1
}
function parseline() {
f=4 # toss number, type, audit event
argc= 0;
argssize = "0"
if ($NF != "}") {
funcalias=$(NF-2)
argalias=$(NF-1)
rettype=$NF
end=NF-3
} else {
funcalias=""
argalias=""
rettype="int"
end=NF
}
if ($3 == "NODEF") {
auditev="AUE_NULL"
funcname=$4
argssize = "AS(" $6 ")"
return
}
if ($f != "{")
parserr($f, "{")
f++
if ($end != "}")
parserr($end, "}")
end--
if ($end != ";")
parserr($end, ";")
end--
if ($end != ")")
parserr($end, ")")
end--
f++ #function return type
funcname=$f
if (funcalias == "")
funcalias = funcname
if (argalias == "") {
argalias = funcname "_args"
if ($3 == "COMPAT")
argalias = "o" argalias
if ($3 == "COMPAT4")
argalias = "freebsd4_" argalias
if ($3 == "COMPAT6")
argalias = "freebsd6_" argalias
}
f++
if ($f != "(")
parserr($f, ")")
f++
if (f == end) {
if ($f != "void")
parserr($f, "argument definition")
return
}
while (f <= end) {
argc++
argtype[argc]=""
oldf=""
while (f < end && $(f+1) != ",") {
if (argtype[argc] != "" && oldf != "*")
argtype[argc] = argtype[argc]" ";
argtype[argc] = argtype[argc]$f;
oldf = $f;
f++
}
if (argtype[argc] == "")
parserr($f, "argument definition")
argname[argc]=$f;
f += 2; # skip name, and any comma
}
if (argc != 0)
argssize = "AS(" argalias ")"
}
{ comment = $4
if (NF < 7)
for (i = 5; i <= NF; i++)
comment = comment " " $i
}
#
# The AUE_ audit event identifier.
#
{
auditev = $2;
}
$3 == "STD" || $3 == "NODEF" || $3 == "NOARGS" || $3 == "NOPROTO" \
|| $3 == "NOIMPL" || $3 == "NOSTD" {
parseline()
printf("\t/* %s */\n\tcase %d: {\n", funcname, syscall) > systrace
printf("\t/* %s */\n\tcase %d:\n", funcname, syscall) > systracetmp
if (argc > 0) {
printf("\t\tswitch(ndx) {\n") > systracetmp
printf("\t\tstruct %s *p = params;\n", argalias) > systrace
for (i = 1; i <= argc; i++) {
printf("\t\tcase %d:\n\t\t\tp = \"%s\";\n\t\t\tbreak;\n", i - 1, argtype[i]) > systracetmp
if (index(argtype[i], "*") > 0 || argtype[i] == "caddr_t")
printf("\t\tuarg[%d] = (intptr_t) p->%s; /* %s */\n", \
i - 1, \
argname[i], argtype[i]) > systrace
else if (substr(argtype[i], 1, 1) == "u" || argtype[i] == "size_t")
printf("\t\tuarg[%d] = p->%s; /* %s */\n", \
i - 1, \
argname[i], argtype[i]) > systrace
else
printf("\t\tiarg[%d] = p->%s; /* %s */\n", \
i - 1, \
argname[i], argtype[i]) > systrace
}
printf("\t\tdefault:\n\t\t\tbreak;\n\t\t};\n") > systracetmp
}
printf("\t\t*n_args = %d;\n\t\tbreak;\n\t}\n", argc) > systrace
printf("\t\tbreak;\n") > systracetmp
if ((!nosys || funcname != "nosys") && \
(funcname != "lkmnosys") && (funcname != "lkmressys")) {
if (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO") {
printf("struct %s {\n", argalias) > sysarg
for (i = 1; i <= argc; i++)
printf("\tchar %s_l_[PADL_(%s)]; " \
"%s %s; char %s_r_[PADR_(%s)];\n",
argname[i], argtype[i],
argtype[i], argname[i],
argname[i], argtype[i]) > sysarg
printf("};\n") > sysarg
}
else if ($3 != "NOARGS" && $3 != "NOPROTO" && \
$3 != "NODEF")
printf("struct %s {\n\tregister_t dummy;\n};\n",
argalias) > sysarg
}
if (($3 != "NOPROTO" && $3 != "NODEF" && \
(funcname != "nosys" || !nosys)) || \
(funcname == "lkmnosys" && !lkmnosys) || \
funcname == "lkmressys") {
printf("%s\t%s(struct thread *, struct %s *)",
rettype, funcname, argalias) > sysdcl
printf(";\n") > sysdcl
printf("#define\t%sAUE_%s\t%s\n", syscallprefix,
funcalias, auditev) > sysaue
}
if (funcname == "nosys")
nosys = 1
if (funcname == "lkmnosys")
lkmnosys = 1
printf("\t{ %s, (sy_call_t *)", argssize) > sysent
column = 8 + 2 + length(argssize) + 15
if ($3 == "NOIMPL") {
printf("%s },", "nosys, AUE_NULL, NULL, 0, 0") > sysent
column = column + length("nosys") + 3
} else if ($3 == "NOSTD") {
printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0") > sysent
column = column + length("lkmressys") + 3
} else {
printf("%s, %s, NULL, 0, 0 },", funcname, auditev) > sysent
column = column + length(funcname) + length(auditev) + 3
}
align_sysent_comment(column)
printf("/* %d = %s */\n", syscall, funcalias) > sysent
printf("\t\"%s\",\t\t\t/* %d = %s */\n",
funcalias, syscall, funcalias) > sysnames
if ($3 != "NODEF") {
printf("#define\t%s%s\t%d\n", syscallprefix,
funcalias, syscall) > syshdr
printf(" \\\n\t%s.o", funcalias) > sysmk
}
syscall++
next
}
$3 == "COMPAT" || $3 == "COMPAT4" || $3 == "COMPAT6" || $3 == "CPT_NOA" {
if ($3 == "COMPAT" || $3 == "CPT_NOA") {
ncompat++
out = syscompat
outdcl = syscompatdcl
wrap = "compat"
prefix = "o"
} else if ($3 == "COMPAT4") {
ncompat4++
out = syscompat4
outdcl = syscompat4dcl
wrap = "compat4"
prefix = "freebsd4_"
} else if ($3 == "COMPAT6") {
ncompat6++
out = syscompat6
outdcl = syscompat6dcl
wrap = "compat6"
prefix = "freebsd6_"
}
parseline()
if (argc != 0 && $3 != "CPT_NOA") {
printf("struct %s {\n", argalias) > out
for (i = 1; i <= argc; i++)
printf("\tchar %s_l_[PADL_(%s)]; %s %s; " \
"char %s_r_[PADR_(%s)];\n",
argname[i], argtype[i],
argtype[i], argname[i],
argname[i], argtype[i]) > out
printf("};\n") > out
}
else if($3 != "CPT_NOA")
printf("struct %s {\n\tregister_t dummy;\n};\n",
argalias) > sysarg
printf("%s\t%s%s(struct thread *, struct %s *);\n",
rettype, prefix, funcname, argalias) > outdcl
printf("\t{ %s(%s,%s), %s, NULL, 0, 0 },",
wrap, argssize, funcname, auditev) > sysent
align_sysent_comment(8 + 9 + \
length(argssize) + 1 + length(funcname) + length(auditev) + 4)
printf("/* %d = old %s */\n", syscall, funcalias) > sysent
printf("\t\"%s.%s\",\t\t/* %d = old %s */\n",
wrap, funcalias, syscall, funcalias) > sysnames
if ($3 == "COMPAT" || $3 == "CPT_NOA") {
printf("\t\t\t\t/* %d is old %s */\n",
syscall, funcalias) > syshdr
} else {
printf("#define\t%s%s%s\t%d\n", syscallprefix,
prefix, funcalias, syscall) > syshdr
printf(" \\\n\t%s%s.o", prefix, funcalias) > sysmk
}
syscall++
next
}
$3 == "LIBCOMPAT" {
ncompat++
parseline()
printf("%s\to%s();\n", rettype, funcname) > syscompatdcl
printf("\t{ compat(%s,%s), %s, NULL, 0, 0 },",
argssize, funcname, auditev) > sysent
align_sysent_comment(8 + 9 + \
length(argssize) + 1 + length(funcname) + length(auditev) + 4)
printf("/* %d = old %s */\n", syscall, funcalias) > sysent
printf("\t\"old.%s\",\t\t/* %d = old %s */\n",
funcalias, syscall, funcalias) > sysnames
printf("#define\t%s%s\t%d\t/* compatibility; still used by libc */\n",
syscallprefix, funcalias, syscall) > syshdr
printf(" \\\n\t%s.o", funcalias) > sysmk
syscall++
next
}
$3 == "OBSOL" {
printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },") > sysent
align_sysent_comment(34)
printf("/* %d = obsolete %s */\n", syscall, comment) > sysent
printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n",
$4, syscall, comment) > sysnames
printf("\t\t\t\t/* %d is obsolete %s */\n",
syscall, comment) > syshdr
syscall++
next
}
$3 == "UNIMPL" {
printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },\t\t\t/* %d = %s */\n",
syscall, comment) > sysent
printf("\t\"#%d\",\t\t\t/* %d = %s */\n",
syscall, syscall, comment) > sysnames
syscall++
next
}
{
printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $3
exit 1
}
END {
printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0)
printf "#include \"opt_compat.h\"\n\n" > syssw
if (ncompat != 0) {
printf "\n#ifdef %s\n", compat > sysinc
printf "#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)\n" > sysinc
printf "#else\n" > sysinc
printf "#define compat(n, name) 0, (sy_call_t *)nosys\n" > sysinc
printf "#endif\n" > sysinc
}
if (ncompat4 != 0) {
printf "\n#ifdef %s\n", compat4 > sysinc
printf "#define compat4(n, name) n, (sy_call_t *)__CONCAT(freebsd4_,name)\n" > sysinc
printf "#else\n" > sysinc
printf "#define compat4(n, name) 0, (sy_call_t *)nosys\n" > sysinc
printf "#endif\n" > sysinc
}
if (ncompat6 != 0) {
printf "\n#ifdef %s\n", compat6 > sysinc
printf "#define compat6(n, name) n, (sy_call_t *)__CONCAT(freebsd6_,name)\n" > sysinc
printf "#else\n" > sysinc
printf "#define compat6(n, name) 0, (sy_call_t *)nosys\n" > sysinc
printf "#endif\n" > sysinc
}
printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
printf("\n#endif /* %s */\n\n", compat6) > syscompat6dcl
printf("\n#undef PAD_\n") > sysprotoend
printf("#undef PADL_\n") > sysprotoend
printf("#undef PADR_\n") > sysprotoend
printf("\n#endif /* !%s */\n", sysproto_h) > sysprotoend
printf("\n") > sysmk
printf("};\n") > sysent
printf("};\n") > sysnames
printf("#define\t%sMAXSYSCALL\t%d\n", syscallprefix, syscall) \
> syshdr
printf "\tdefault:\n\t\t*n_args = 0;\n\t\tbreak;\n\t};\n}\n" > systrace
printf "\tdefault:\n\t\tbreak;\n\t};\n\tif (p != NULL)\n\t\tstrlcpy(desc, p, descsz);\n}\n" > systracetmp
} '
cat $sysinc $sysent >> $syssw
cat $sysarg $sysdcl \
$syscompat $syscompatdcl \
$syscompat4 $syscompat4dcl \
$syscompat6 $syscompat6dcl \
$sysaue $sysprotoend > $sysproto
cat $systracetmp >> $systrace
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