When used with the "fs" option to chain.c32, we need to know our own
filesystem offset.  That means knowing if we used the MBR vs GPT
partition information, as well as if we ended up using the passed-in
information or not.

Resolve this by providing an explicit pointer to the current partition
offset.  Eventually this should be replaced by some kind of statfs()
call.

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

Implement getcwd() in the core; Fix COM32 getcwd() to use the new function.

This resolves the previous comment about COM32 getcwd() not working by
not using INT 22h AX=001Fh.

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

Fix COM32 chdir() since it's implemented in the core.
Forgot the core changes needed for this before.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Future-proof the pmapi vector by making it include its own size.

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

Correct the order of the fields in struct syslinux_ipinfo to match
reality.

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

It appears that there still are PXE stacks in the field which needs
the crutch of being pointed to the default gateway.  As such, put all
the IP information into a single memory structure and allow modules to
see it.

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

Unify multiple open-coded instances of integer binary logarithm.

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

CPUID functions were apparently broken when made PIC-safe; clean up
and fix.

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

Do the actual idling in protected mode.  This both allows PM code a
more efficient interface, but also handles bugs in HVM implementations
which don't handle HLT in real mode.

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

Resolved Conflicts:
	MCONFIG.embedded
	com32/MCONFIG
	com32/include/com32.h
	core/com32.inc
	core/pxelinux.asm
	doc/comboot.txt

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