9acbffd33b9200ffe37833463b4d4478e824295a caused more issues than it solves.
There appears to be a bigger underlying issue that the __weak argument masks.
Until the underlying issue is solved, we need __weak.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>

Weaken 2 declarations.  Seems to be the minimal amount for now.

First exhibited issues with EFI but later also with BIOS beyond *pxelinux.0
when compiled with gcc-5.3.1 and gcc-6.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>

We used to need a wrapper around the core function dns_resolv() to
implement pxe_dns(), because the former function required its argument
to live in low memory.  This is no longer the case and hasn't been for
a while, so remove this unnecessary level of indirection.

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

The prototypes themselves are not weak, and declaring them as
such forces the core definitions, which should not be weak, as weak.

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

Getting the keyboard shift state is a firmware method.  It is
unfortunately unclear if it is even possible on EFI.

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

Filesystem UUID shows the partition we boot kernel from.
The kernel parameter has format like FSUUID=DA1A-0B2E.
The SYSAPPEND bit is 0x40000. Now the FAT only supports FSUUID.
The patch is based on 67aaaeeb228.

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Remove the shuffle and boot comapi call.  This is the last of the
comapi calls left; we should now be able to completely remove the
comapi support.

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

Export the initial stack and PXE(NV) structure pointers properly, even
for users which need seg:offs.  Use this in pxechn.c rather than the
already-removed INT 22h AX=000Ah call.

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

Some functions are ignoring the const qualifier.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>

commit 60dabb5b1d6d ("pxe: Make the SENDCOOKIES feature for HTTP worked
again") introduced a regression for ldlinux because it references the
'SendCookies' symbol, which is only provided by PXELINUX.

The regression was caused because the '__weak' tag was dropped from the
declaration of SendCookies.

Tested-by: "Santillanes, Russel" <Russel.Santillanes@gs.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>