66 lines
1.7 KiB
Perl
66 lines
1.7 KiB
Perl
#!/usr/bin/perl -w
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#
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# Copyright (c) 2012 Joel Sing <jsing@openbsd.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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#
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# Ensure that the file offset for .text and .data aligns with the LMA. If they
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# do not match boot(8) will fail since biosboot(8) does not perform relocation.
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#
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$LINKBASE = 0x40000;
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if (scalar(@ARGV) != 1) {
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print "Usage: check-boot.pl boot\n";
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exit(2);
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}
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$boot = shift @ARGV;
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if (! -f $boot) {
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print "No such file - $boot\n";
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exit(2);
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}
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$valid = 1;
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$sections = 0;
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open(OBJDUMP, "/usr/bin/objdump -h $boot |") || die "Failed to run objdump";
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while (<OBJDUMP>) {
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@section = split / +/, $_;
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next if scalar(@section) < 7;
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if ($section[2] =~ /(\.(text|data))/) {
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$name = $1;
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$lma = hex($section[5]);
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$fileoff = hex($section[6]);
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$offset = $lma - $LINKBASE;
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$sections++;
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if ($fileoff != $offset) {
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printf "$name has incorrect file offset " .
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"0x%x (should be 0x%x)\n", $fileoff, $offset;
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$valid = 0;
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}
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}
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}
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close(OBJDUMP);
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if ($sections != 2) {
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print "Failed to find .text or .data section!\n";
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exit(1);
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}
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exit(1) if ! $valid;
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