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#!/usr/bin/perl -w
#generate syscall table from a template file (usually the master i386 syscall
#ent.h) and the x86_64 unistd.h
%conv = (
"exit" => "_exit",
);
%known = (
"mmap" => "sys_mmap",
"sched_yield" => "printargs",
);
# only used when the template file has no entry
%args = (
"arch_prctl" => 2,
"tkill" => 2,
"gettid" => 0,
"readahead" => 3,
# should decode all these:
"setxattr" => 5,
"lsetxattr" => 5,
"fsetxattr" => 5,
"getxattr" => 4,
"lgetxattr" => 4,
"fgetxattr" => 4,
"listxattr" => 3,
"llistxattr" => 3,
"flistxattr" => 3,
"removexattr" => 2,
"lremovexattr" => 2,
"fremovexattr" => 2,
"mmap" => 6,
"sched_yield" => 0,
);
open(F,$ARGV[0]) || die "cannot open template file $ARGV[0]\n";
while (<F>) {
next unless /{/;
s/\/\*.*\*\///;
($name) = /"([^"]+)"/;
chomp;
$call{$name} = $_;
}
open(SL, ">syscallnum.h") || die "cannot create syscallnum.h\n";
open(S,$ARGV[1]) || die "cannot open syscall file $ARGV[1]\n";
while (<S>) {
$name = "";
next unless (($name, $num) = /define\s+__NR_(\S+)\s+(\d+)/);
next if $name eq "";
$name = $conv{$name} if defined($conv{$name});
if (!defined($call{$name})) {
unless (defined($args{$name})) {
print STDERR "unknown call $name $num\n";
$na = 3;
} else {
$na = $args{$name};
}
if (defined($known{$name})) {
$func = $known{$name};
} else {
$func = "printargs";
}
print "\t{ $na,\t0,\t$func,\t\"$name\" }, /* $num */\n";
} else {
print "$call{$name} /* $num */\n";
}
print SL "#define SYS_$name $num\n"
}
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