GNU_efi_HelloWorld/hello.c


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#include <efi.h>
#include <efilib.h>

EFI_STATUS
EFIAPI
efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {

	EFI_LOADED_IMAGE *loaded_image = NULL;
	EFI_STATUS status;

	InitializeLib(ImageHandle, SystemTable);
	Print(L"Hello, world!\n");

	status = uefi_call_wrapper(SystemTable->BootServices->HandleProtocol,
					3,
					ImageHandle,
					&LoadedImageProtocol,
					(void **)&loaded_image);

	if (EFI_ERROR(status)) {
		Print(L"handleprotocol: %r\n", status);
	}

	Print(L"Image base: 0x%lx\n", loaded_image->ImageBase);

	DEBUG((D_ERROR, "AllocatePool: out of pool  %x\n", status));

	volatile int wait = 1;
	while(wait) {
		__asm__ __volatile__("pause");
	}

	return EFI_SUCCESS;
}