74 lines
2.0 KiB
Perl
Executable File
74 lines
2.0 KiB
Perl
Executable File
#!/usr/bin/perl -s
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my $tls = shift;
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my $tls_out = shift;
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open(TLS, $tls) or die "$0: couldn't open tls file \"$tls\" - $!\n";
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my $struct = '';
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my @fields = ();
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my $def = '';
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my $tls = join('', <TLS>);
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$tls =~ s/\A.*?gentls_offsets[^\n]*\n//os;
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$tls =~ s%/\*\s*gentls_offsets.*?/\*\s*gentls_offsets\s*\*/%%ogs;
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foreach ($tls =~ /^.*\n/mg) {
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$def .= $_ if $struct;
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last if /^};/o;
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/^\s*typedef/o and do {
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$def .= $_ ;
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next;
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};
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if (!s/;.*$//o) {
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if (!$struct && /^\s*(?:struct|class)\s*([a-z_0-9]+)/o) {
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$def .= $_;
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$struct = $1
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}
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next;
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}
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s/(?:\[[^\]]*\]|struct|class)//o;
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s/^\s+\S+\s+//o;
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s/[\*\s()]+//go;
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for my $f (split(/,/)) {
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push(@fields, $f);
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}
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}
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close TLS;
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open(TMP, '>', "/tmp/$$.cc") or die "$0: couldn't open temporary index file \"/tmp/$$.c\" - $!\n";
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print TMP <<EOF;
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#define __attribute__(X)
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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typedef void *HANDLE;
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$def
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int
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main(int argc, char **argv)
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{
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$struct foo[1];
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# define foo_end ((char *) (foo + 1))
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# define offset(f) (((char *) &(foo->f)) - foo_end)
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EOF
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print TMP 'puts ("//;# autogenerated: Do not edit.\n");', "\n\n";
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for my $f (@fields) {
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print TMP ' printf ("//; $tls::', $f, ' = %d;\n", ', "offset($f));\n";
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}
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print TMP ' puts ("//; __DATA__\n");', "\n";
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for my $f (@fields) {
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print TMP ' printf ("#define tls_', $f, ' (%d)\n", ', "offset($f));\n";
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}
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print TMP <<EOF;
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exit (0);
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}
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EOF
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close TMP;
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system @ARGV, '-o', "/tmp/$$-1.cc", '-E', "/tmp/$$.cc";
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system 'g++', '-o', "/tmp/$$.a.out", "/tmp/$$-1.cc" and
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($? == 127 && system 'c++', '-o', "/tmp/$$.a.out", "/tmp/$$-1.cc") and
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die "$0: couldn't generate executable for offset calculation \"/tmp/$$.a.out\" - $!\n";
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open(TLS_OUT, '>', $tls_out) or die "$0: couldn't open tls index file \"tls_out\" - $!\n";
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open(OFFS, "/tmp/$$.a.out|") or die "$0: couldn't run \"/tmp/$$.a.out\" - $!\n";
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print TLS_OUT <OFFS>;
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close OFFS;
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close TLS_OUT;
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# unlink "/tmp/$$.cc", "/tmp/$$.a.out";
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exit(0);
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