powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE

boot := arch/$(ARCH)/boot

ifeq ($(CONFIG_RELOCATABLE),y)

quiet_cmd_relocs_check = CALL    $<

      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"

PHONY += relocs_check

relocs_check: arch/powerpc/relocs_check.pl vmlinux

	$(call cmd,relocs_check)

zImage: relocs_check

endif

$(BOOT_TARGETS): vmlinux

	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

#!/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 relcoations 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 relcoation lines.

	next if (!/\s+R_/);

	# These relocations are okay

	next if (/R_PPC64_RELATIVE/ or /R_PPC64_NONE/ or

	         /R_PPC64_ADDR64\s+mach_/);

	# If we see this type of relcoation 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 binutils >= 2.19 to build a ".

	      "CONFIG_RELCOATABLE kernel\n";

}