Ronald G Minnich <[EMAIL PROTECTED]> writes:
> On 21 May 2002, Eric W. Biederman wrote:
>
> > No but if you have ld newer that 1.10 you may have problems.
>
Grr. I meant 2.10....
> GNU ld version 2.11.90.0.8 (with BFD 2.11.90.0.8)
> GNU ld version 2.11.90.0.8 (with BFD 2.11.90.0.8)
>
> > Loading data a segment at 512K for 1824K bytes looks very suspcious.
>
> I seems like it had coalesced all the data at 0x80000 up to the end of
> ramdisk (I moved ramdisk to 0x200000 to avoid 8M+ elfImage files) and then
> just loaded that to ram. But it does look strange.
Cool now I finally know what strange behavior is generating 8M+
elfImages. Using 2M instead of 8M is actively dangerous. And
uncompressed kernel is easily over 1M is size.
> > If it works the new mkelfImage should be more loader agnostic.
> > In particular it should work just fine under etherboot as well.
>
> fails under etherboot 5.0.5, with the error
> Me: 10.0.4.22, Server: 10.0.4.1
> Before loading kernel in load
> Loading 10.0.4.1:/tftpboot/kernel (ELF)... segment in reserved area
> Unable to load file.
>
> Looks like etherboot is unhappy about an elfImage segment overlapping
> 0x94000, just judging by my reading of the source.
>
> > What does readelf -a say about your image?
>
> Program Headers:
> Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
> NOTE 0x001000 0x00080000 0x00080000 0x00208 0x00208 R 0x4
> LOAD 0x001000 0x00080000 0x00080000 0x1c40f6 0x1c83ae RWE
> 0x1000
>
> Section to Segment mapping:
> Segment Sections...
> 00 .note
> 01 .note .text .rodata .rodata.str1.1 .rodata.str1.32 .data .bss
> .nokill
> .kernel .ramdisk
>
>
> Linuxbios seems to agree with readelf about the layout. Interesting.
>
> Should it really be all merged like this?
No the segments should not be merged. I explicitly told ld to give me
4 headers. It might be the strip command that removes junk from the
image, that is merging them.
In build_elf_image could you try commenting out the lines labeled
below. ld and I really don't get along very well right now.
sub build_elf_image
{
my ($params, $dst, @srcs) = @_;
my $lscript = "mkelfImage.lds";
my $fd = new FileHandle;
$fd->open(">$lscript");
$fd->print("initrd_base = $params->{INITRD_BASE};\n");
$fd->close();
my $script = "$params->{PREFIX}/elfImage.lds";
my $cmd = "$params->{LD} -o ${dst}.fat -T $script " . join(" ", @srcs);
system("$cmd");
die "rc = $?" unless ($? == 0);
# my $cmd2 = "$params->{OBJCOPY} ${dst}.fat ${dst} -S -R .comment -R .note0";
# if (!$params->{RAMDISK}) {
# $cmd2 .= " -R .ramdisk";
# }
# system("$cmd2");
# die "rc = $?" unless ($? == 0);
unlink("${dst}.obj",$lscript);
unlink("${dst}.fat",$lscript);
return $dst;
}
Eric
