Add a macro for weak symbols.

__likely() and __unlikely() should explicitly booleanize their
arguments.

Simplify and fix bugs in the code to store and match label names
without filename mangling.

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

Store the label names unmangled and match those against command_line.

- Sebastian

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

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

The address in EDI returned by the load_high call used to load the
kernel needs to be passed to parse_load_initrd, but the code which
clears memory after setup sectors for 1.2.x kernels was corrupting
low 16 bits of EDI.  In most cases this corruption was not noticed,
because with usual setup sizes DI was set to 0xf800, therefore the
chance of getting the kernel size such that initrd would actually
overwrite the kernel was about 3%.

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Attempts to load *.lkrn images were failing with "Not enough memory
to load specified image".  These images have the su_ramdisk_max
header field set to zero, and the code in core/runkernel.inc was
limiting MyHighMemSize too early (before the load_high call used to
load the main part of the kernel).

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Avoid touching memory at address zero when going from a background to
a non-background.

pci_bus->pci_device get's populated with functions so it
should take up to MAX_PCI_DEVICES * MAX_PCI_FUNC elements.
pci_device_list->pci_device get's populated with functions
for every possible pci bus. Therefore it should take up to
MAX_PCI_BUS * MAX_PCI_DEVICES * MAX_PCI_FUNC elements.
Also adjust count variable types.

- Sebastian

Replace get_config() and execute() with syslinux_config_file() and
syslinux_run_command().

- Sebastian