101 lines
2.7 KiB
Perl
101 lines
2.7 KiB
Perl
#!/usr/bin/env perl
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use warnings;
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use File::Temp qw/ tempfile /;
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use Getopt::Long;
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# Default to the system objdump if a cross-compiler edition not given.
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my $aobjdump = "objdump";
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my $hobjdump = "";
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my $tobjdump = "";
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my $hmachine = "";
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my $tmachine = "";
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GetOptions ('O|objdump=s' => \$aobjdump,
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'host-objdump=s' => \$hobjdump,
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'target-objdump=s' => \$tobjdump,
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'h|host-machine=s' => \$hmachine,
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't|target-machine=s' => \$tmachine);
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# But we can't default the machines. Sanity check that we've at least one.
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die "No host or target machine type" if !$hmachine && !$tmachine;
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# Reuse one temp file for all of the hunks.
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my ($outh, $outname) = tempfile();
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binmode($outh);
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END { unlink $outname; }
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# Pre-construct the command-lines for executing the dump.
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sub mkobjcommand ($$) {
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my ($cmd, $mach) = @_;
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return 0 if !$mach;
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$cmd = $aobjdump if !$cmd;
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return "$cmd -m $mach --disassemble-all -b binary";
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}
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$objdump[1] = mkobjcommand($hobjdump, $hmachine);
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$objdump[2] = mkobjcommand($tobjdump, $tmachine);
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# Zero-initialize current dumping state.
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my $mem = "";
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my $inobjd = 0;
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my $vma = 0;
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sub objcommand {
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my $ret = $objdump[$inobjd];
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if (!$ret) {
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die "Host machine type not specified" if $inobjd == 1;
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die "Target machine type not specified" if $inobjd == 2;
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die "Internal error";
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}
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return $ret;
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}
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while (<>) {
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# Collect the data from the relevant OBJD-* lines ...
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if (/^OBJD-H: /) {
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die "Internal error" if $inobjd == 2;
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$mem = $mem . pack("H*", substr($_, 8, -1));
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$inobjd = 1;
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} elsif (/^OBJD-T: /) {
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die "Internal error" if $inobjd == 1;
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$mem = $mem . pack("H*", substr($_, 8, -1));
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$inobjd = 2;
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}
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# ... which will always be followed by a blank line,
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# at which point we should produce our dump.
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elsif ($inobjd) {
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# Rewrite the temp file in one go; it will usually be small.
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sysseek $outh, 0, 0;
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truncate $outh, 0;
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syswrite $outh, $mem;
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my $cmd = objcommand();
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$cmd = $cmd . " --adjust-vma=" . $vma if $vma;
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$cmd = $cmd . " " . $outname;
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# Pipe from objdump...
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open IN, "-|", $cmd;
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# ... copying all but the first 7 lines of boilerplate to our stdout.
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my $i = 0;
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while (<IN>) {
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print if (++$i > 7);
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}
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close IN;
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print "\n";
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$mem = "";
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$inobjd = 0;
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$vma = 0;
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}
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# The line before "OBJD-*" will be of the form "0x<hex>+: +\n".
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# Extract the value for passing to --adjust-vma.
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elsif (/^(0x[0-9a-fA-F]+):\s*$/) {
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$vma = $1;
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print;
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} else {
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print;
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}
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}
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