68 lines
1.7 KiB
Perl
68 lines
1.7 KiB
Perl
#!/usr/bin/perl -w
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#
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# This perl script takes an order file produced by the "order" program
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# as input (specified on the command line) and outputs a script for
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# GNU ld that orders functions in the specified order, assuming that
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# all of the source files were compiled with the -ffunction-sections
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# flag. Output goes to the file specified with "-o" flag.
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use Getopt::Std;
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getopts("o:");
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if ($#ARGV != 0 || !defined $::opt_o) {
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die("usage: mklinkscript -o script-file order-file");
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}
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$linkScript = $::opt_o;
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$tmpFile = "$linkScript.tmp";
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$orderFile = $ARGV[0];
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open(LD, "ld --verbose|") || die("ld: $!");
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#
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# Initial output is to a temp file so that if we fail there won't be
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# broken GNU ld script lying around to confuse the build and anyone
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# trying to use it.
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#
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open(TMP, ">$tmpFile") || die("$tmpFile: $!");
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sub PrintOrder {
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my $line;
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open(ORDER, $orderFile) || die("$orderFile: $!");
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while ($line = <ORDER>) {
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chomp $line;
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print(TMP "*(.text.$line)\n");
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print(TMP "*(.gnu.linkonce.t.$line)\n");
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}
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close(ORDER);
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}
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$skip = 1;
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LINE:
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while ($line = <LD>) {
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chomp $line;
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if ($skip && $line =~ /^=*$/) {
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$skip = 0;
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next LINE;
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} elsif (!$skip && $line =~ /^=*$/) {
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last LINE;
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}
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if ($skip) {
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next LINE;
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}
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print TMP "$line\n";
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if ($line =~ /^[\s]*.text[\s]*:[\s]*$/) {
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defined($line = <LD>) || die("Premature end of ld input");
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print TMP "$line";
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print TMP "*(.text)\n";
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&PrintOrder();
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<LD>; # Skip over *(.text)
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}
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}
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close(LD);
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close(TMP);
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#
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# Everything went OK, so create the real output file.
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#
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rename($tmpFile, $linkScript) || die("$linkScript: $!");
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