Initial commit - UEFI application building

src/arch/x86_64/config.mk

@@ -0,0 +1,6 @@
+AS := nasm
+ASFLAGS := -felf
+LDFLAGS := -m elf_x86_64
+CFLAGS := -march=nocona -m64
+
+# vim:ft=make

src/arch/x86_64/kernel.ld

@@ -0,0 +1,32 @@
+ENTRY(start)
+SECTIONS
+{
+	. = 0x100000;
+
+	.__mbHeader : {
+		mboot = .;
+		*(.__mbHeader)
+		. = ALIGN(4096);
+	}
+
+	.text : {
+		code = .;
+		*(.text)
+		. = ALIGN(4096);
+	}
+
+	.data : {
+		 data = .;
+		 *(.data)
+		 *(.rodata)
+		 . = ALIGN(4096);
+	}
+
+	.bss : {
+		bss = .;
+		*(.bss)
+		. = ALIGN(4096);
+	}
+
+	end = .;
+}

src/arch/x86_64/main.c

@@ -0,0 +1,30 @@
+//#define EFIAPI __attribute__((ms_abi))
+
+#include <efi.h>
+#include <efilib.h>
+
+#define check_status(s, msg)   if(EFI_ERROR((s))){Print(L"EFI_ERROR: " msg L" %d\n", (s)); return (s);}
+
+EFI_STATUS
+efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
+{
+	EFI_STATUS status;
+
+	InitializeLib(ImageHandle, SystemTable);
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
+	status = ST->ConOut->OutputString(ST->ConOut, L"Hello from UEFI\n\r");
+#pragma GCC diagnostic pop
+	check_status(status, L"OutputString");
+
+	Print(L" SystemTable: %x\n", SystemTable);
+	if (SystemTable)
+		Print(L"      ConOut: %x\n", SystemTable->ConOut);
+	if (SystemTable->ConOut)
+		Print(L"OutputString: %x\n", SystemTable->ConOut->OutputString);
+
+	while (1) __asm__("hlt");
+	return status;
+}
+