Actually (try to) handle the case of finding the DOS memory amount.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Reformat the mboot header files slightly, use <inttypes.h> types, and
add header inclusion guards.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Better handling of failed mapping; correct copyright notice.

Reimplement the Solaris DHCP information passing hack.

Add a spec-compliant mode for the "a.out kludge".  The spec is pretty
clear that the bit should override the ELF header (after all,
otherwise there wouldn't be any need for the bit), but Grub
disagrees.  We default to Grub-compliant mode, as Solaris seems to set
the bit even though it's an ELF kernel, but add the option to enable
spec-compliant mode, as apparently some versions of FreeBSD need it.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Fix module command lines (it was overwriting the main kernel command
line); a few minor layout tweaks.  In particular, we require the
section header to be page-aligned, but not the subsequent sections.

With this, I can get Xen to boot.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

When walking the argument list we need to skip --- markers.

Grub, and the old mboot.c32, seem to transparently decompress all
files, not just the main one, so do the same.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

When we actually finished mapping the image, return 0 and don't bail.
Add error messages to most failure cases.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Generate the dependency files by default.  They should perhaps even
move into the actual rule lines.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Set up a stack for the Multiboot OS even though it is not required by
spec.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>