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#! /bin/env perl
#
# Copyright (c) 2011, ARM Limited. All rights reserved.
#
# Redistribution and use in source and binary forms, with
# or without modification, are permitted provided that the
# following conditions are met:
#
# Redistributions of source code must retain the above
# copyright notice, this list of conditions and the
# following disclaimer.
#
# Redistributions in binary form must reproduce the
# above copyright notice, this list of conditions and
# the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of ARM nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
use strict;
use vars qw(
$image
$source
$obj
$map
$kernaddr
$sh
$mh
%chunksdone
@chunks
);
sub addchunk($$)
{
my $file = shift;
my $addr = shift;
my $size = -s $file;
my $name = $file;
$name =~ s|^.*/([^/]+)$|$1|;
# Multiple contiguous sections are saved as one chunk, so in that case only process the first
if (!defined $chunksdone{$name})
{
print $sh <<EOF;
AREA |$name|, CODE, ALIGN=2
INCBIN $file
EOF
print $mh <<EOF;
$name $addr $size
{
${name}DATA $addr $size
{
$obj ($name)
}
}
EOF
$chunksdone{$name} = 1;
push @chunks, [ $addr, $size ];
}
}
sub num($)
{
my $n = shift;
$n = oct $n if $n =~ /^0/;
return $n;
}
sub covered($)
{
my $start = num(shift);
for (@chunks)
{
# printf "Checking $start against chunk $_->[0] (%d), $_->[1] (%d), %d\n",num($_->[0]),num($_->[1]),num($_->[0])+num($_->[0]);
return 1 if $start >= num($_->[0]) && $start < num($_->[0])+num($_->[1]);
}
return 0;
}
($image=shift) && ($source = shift) or die "\
Usage: $0 image source [ kernaddr ]
Creates source and map files to load the sections of \$image
\(if it is an ARM ELF file\), or the whole of \$image at \$kernaddr";
$kernaddr=shift;
$map="$source.map";
$obj="$source.o";
open $sh, ">$source.S" or die "Can't create '$source.S'";
open $mh, ">$map" or die "Can't create '$map'";
# Check if $image is an ELF file
my $type=`file -L $image`;
if ( $type =~ /ELF.*ARM/ )
{
# print "$image is an ELF file - splitting\n";
system("rm -rf $image.bin");
system("fromelf --bin $image -o $image.bin");
my $fromelfv=`fromelf --vsn`;
($fromelfv=~/FromELF, (RVCT|)([\d\.]+)/) && ($2 >= 4.1) or die "fromelf version '$2' is too old - need 4.1 or greater";
my $desc = `fromelf --text $image`;
my $chunk;
my $chunkdone;
my %chunkdefined;
my $zichunk;
for my $line (split /\n/,$desc)
{
# Program header lines indicate what loadable chunks are present
# Handily, these refer to 'Virtual address' rather than 'Address'
$chunkdefined{$1} = 1 if $line =~ /^\s+Virtual address:\s+(0x[0-9a-fA-F]+)/;
# Section entries give the chunk name
if ($line =~ /^\*+\s+Section\s+#\d+\s+'([^']+)/)
{
# If there's only one chunk, fromelf creates a single file not a directory
$chunk = -d "$image.bin" ? "$image.bin/$1" : "$image.bin";
$zichunk = 0;
if ($line =~ / \(SHT_NOBITS\) /)
{
# We produce an explicit block of zeroes to cope with systems that don't auto-expand ZINIT areas
$chunk .= '.zi';
$zichunk = 1;
}
}
if ($zichunk && ($line =~ /^\s+Size\s*:\s+(\d+)\s+bytes/))
{
my $size = $1;
my $h;
open $h, ">$chunk" or die "Can't create ZI chunk '$chunk'";
binmode $h;
print $h chr(0) x $size;
close $h;
}
if ($line =~ /^\s+Address:\s+(0x[0-9a-fA-F]+)/ && ($zichunk || $chunkdefined{$1}))
{
# ZI data is already in the binary dump if it is followed by non-ZI data.
if ($zichunk && covered($1))
{
print "ZI data at $1 set by existing data; will not set explicitly\n";
$zichunk = 0;
# Remove .zi
$chunk = substr($chunk,0,-3);
}
else
{
# Multiple contiguous sections are saved as one chunk, so in that case only process the first
# Here we deal with the case where all the sections are contiguous
addchunk("$chunk",$1) if $zichunk || -d "$image.bin" || !$chunkdone;
$chunkdone = 1;
}
}
$kernaddr=$1 if $line =~ /^\s+Image Entry point:\s+(0x[0-9a-fA-F]+)/;
}
}
else
{
# print "$image being wrapped as plain binary to load at $kernaddr\n";
addchunk($image,$kernaddr);
}
die "No entry point in image or on command line" if !defined $kernaddr;
print $sh " EXPORT ${source}_image\n${source}_image EQU $kernaddr\n END\n";
|
