67 lines
1.6 KiB
Perl
Executable File
67 lines
1.6 KiB
Perl
Executable File
#!/usr/bin/perl
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# Copyright © 2009 IBM Corporation
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version
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# 2 of the License, or (at your option) any later version.
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# This script checks the relcoations of a vmlinux for "suspicious"
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# relocations.
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use strict;
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use warnings;
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if ($#ARGV != 1) {
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die "$0 [path to objdump] [path to vmlinux]\n";
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}
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# Have Kbuild supply the path to objdump so we handle cross compilation.
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my $objdump = shift;
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my $vmlinux = shift;
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my $bad_relocs_count = 0;
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my $bad_relocs = "";
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my $old_binutils = 0;
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open(FD, "$objdump -R $vmlinux|") or die;
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while (<FD>) {
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study $_;
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# Only look at relcoation lines.
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next if (!/\s+R_/);
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# These relocations are okay
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# On PPC64:
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# R_PPC64_RELATIVE, R_PPC64_NONE, R_PPC64_ADDR64
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# On PPC:
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# R_PPC_RELATIVE, R_PPC_ADDR16_HI,
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# R_PPC_ADDR16_HA,R_PPC_ADDR16_LO,
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# R_PPC_NONE
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next if (/\bR_PPC64_RELATIVE\b/ or /\bR_PPC64_NONE\b/ or
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/\bR_PPC64_ADDR64\s+mach_/);
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next if (/\bR_PPC_ADDR16_LO\b/ or /\bR_PPC_ADDR16_HI\b/ or
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/\bR_PPC_ADDR16_HA\b/ or /\bR_PPC_RELATIVE\b/ or
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/\bR_PPC_NONE\b/);
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# If we see this type of relcoation it's an idication that
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# we /may/ be using an old version of binutils.
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if (/R_PPC64_UADDR64/) {
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$old_binutils++;
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}
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$bad_relocs_count++;
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$bad_relocs .= $_;
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}
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if ($bad_relocs_count) {
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print "WARNING: $bad_relocs_count bad relocations\n";
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print $bad_relocs;
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}
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if ($old_binutils) {
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print "WARNING: You need at binutils >= 2.19 to build a ".
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"CONFIG_RELCOATABLE kernel\n";
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}
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