36 lines
1.1 KiB
Perl
Executable File
36 lines
1.1 KiB
Perl
Executable File
#!/usr/bin/perl
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# Calculate the highest possible location for an overlay based
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# on a reference map file (.refmap)
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sub map_scan {
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# The buflib handle table is a few hundred bytes, just before
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# the plugin buffer. We assume it's never more than 1024 bytes.
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# If this assumption is wrong, overlay loading will fail.
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my $max_handle_table_size = 1024;
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my ($map) = @_;
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my $ramstart = -1, $ramsize = -1, $startaddr = -1, $endaddr = -1;
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open (MAP, "<$map");
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while (<MAP>) {
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if ($_ =~ /^PLUGIN_RAM +0x([0-9a-f]+) +0x([0-9a-f]+)$/) {
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$ramstart = hex($1);
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$ramsize = hex($2);
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}
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elsif ($_ =~ / +0x([0-9a-f]+) +_?plugin_start_addr = ./) {
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$startaddr = hex($1);
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}
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elsif ($_ =~ / +0x([0-9a-f]+) +_?plugin_load_end_addr = ./) {
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$endaddr = hex($1);
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}
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}
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close (MAP);
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if ($ramstart < 0 || $ramsize < 0 || $startaddr < 0 || $endaddr < 0
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|| $ramstart != $startaddr) {
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printf "Could not analyze map file.\n";
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exit 1;
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}
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return $ramstart + $ramsize - $endaddr - $max_handle_table_size;
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}
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printf map_scan($ARGV[0]) & ~0xf;
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