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freebsd-dev/sys/kern/makesyscalls.sh
John Baldwin 48a43ae819 Tidy up a few things with syscall generation: 
- Instead of using a syscall slot (370) just to get a function prototype
  for lkmressys(), add an explicit function prototype to <sys/sysent.h>.
  This also removes unused special case checks for 'lkmressys' from
  makesyscalls.sh.
- Instead of having magic logic in makesyscalls.sh to only generate a
  function prototype the first time 'lkmnosys' is seen, make 'NODEF'
  always not generate a function prototype and include an explicit
  prototype for 'lkmnosys' in <sys/sysent.h>.
- As a result of the fix in (2), update the LKM syscall entries in
  the freebsd32 syscall table to use 'lkmnosys' rather than 'nosys'.
- Use NOPROTO for the __syscall() entry (198) in the native ABI.  This
  avoids the need for magic logic in makesyscalls.h to only generate
  a function prototype the first time 'nosys' is encountered.
2008-09-25 20:07:42 +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 (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO" && \
$3 != "NODEF") {
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") {
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
}
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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