As we're starting to rely more and more on a modified hardware state,
it is really important to clean up on all exit paths.

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

Signed-off-by: Liu Aleaxander <Aleaxander@gmail.com>

the main file read function (getfssec) has been converted to
C. Fow now, abort 90% stuff have been converted to C. The
next is to clean the code and convert the rest.

for now, almost all the stuff related to EXT have been converted to C,
and fow my (limit) test, it works well.

The getfssec function haven't converted to C, because it also be called
from asm file, and I find it's a bit hard to convert it to C. But however,
it's my next plan.

We can't safely use 1 MB to directly load the kernel, so shift the
kernel just as we do when loading low.

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

Rename the .text, .data and .bss sections to .text16, .data16 and
.bss16, in anticipation of being linked with compiler-generated 32-bit
code, which presumably would like to use the standard section names.

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

Conflicts:
	core/bootsect.inc
	version

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

KeepPXE was broken in 3.74, because we tried to use both bits 0 and 1,
but failed to actually test both bits.  Instead, just use bit 0, but
move the place where we clear the bits.

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