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