EFI: Initial test EFI application

* Only set HAIKU_BOOT_PLATFORM to bios_ia32 if not defined
* Add gnuefi build feature
* Introduce BOOT_LDFLAGS, and move options for passing to linker
  into ArchitectureSetup
* x86_64 compile fixes for warnings in boot loader
* loader/elf.cpp: don't include ELF32 support when targeting EFI
* relocation_func.cpp: copy of the relocation code from gnuefi
  to make _relocate extern "C", and avoid including <efilib.h>
* boot_loader_efi.ld: copy of gnuefi's elf_x86_64_efi.lds,
  modified to include support for C++ constructors, etc. Keep in
  sync with the gnuefi package

Signed-off-by: Jessica Hamilton <[email protected]>

build/jam/ArchitectureRules

@@ -279,7 +279,7 @@ rule KernelArchitectureSetup architecture
 			HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 192 ; # in kB - unused yet
 
 		case x86 :
-			HAIKU_BOOT_PLATFORM = bios_ia32 ;
+			HAIKU_BOOT_PLATFORM ?= bios_ia32 ;
 			HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 2880 ; # in kB
 			# offset in floppy image (>= sizeof(haiku_loader))
 			HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 320 ; # in kB
@@ -291,7 +291,7 @@ rule KernelArchitectureSetup architecture
 
 		case x86_64 :
 			# x86_64 completely shares the x86 bootloader.
-			HAIKU_BOOT_PLATFORM = bios_ia32 ;
+			HAIKU_BOOT_PLATFORM ?= bios_ia32 ;
 			HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 2880 ; # in kB
 			# offset in floppy image (>= sizeof(haiku_loader))
 			HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 320 ; # in kB
@@ -326,12 +326,6 @@ rule KernelArchitectureSetup architecture
 			Exit "Currently unsupported target CPU:" $(cpu) ;
 	}
 
-	# Include embedded board-specific file.
-	if $(HAIKU_BOOT_BOARD) {
-		include [ FDirName $(HAIKU_BUILD_RULES_DIR) board $(HAIKU_BOOT_BOARD)
-			BoardSetup ] ;
-	}
-
 	# private kernel headers to be used when compiling kernel code
 	HAIKU_PRIVATE_KERNEL_HEADERS =
 		[ PrivateHeaders $(DOT) kernel libroot shared
@@ -361,6 +355,7 @@ rule KernelArchitectureSetup architecture
 	HAIKU_BOOT_CCFLAGS = $(HAIKU_CCFLAGS_$(architecture)) $(gccBaseFlags) ;
 	HAIKU_BOOT_C++FLAGS = $(HAIKU_C++FLAGS_$(architecture)) $(g++BaseFlags) ;
 	HAIKU_BOOT_LINKFLAGS = ;
+	HAIKU_BOOT_LDFLAGS = -Bstatic ;
 
 	if $(gccVersion[1]) >= 4 {
 		HAIKU_KERNEL_C++FLAGS += -std=gnu++11 ;
@@ -370,6 +365,16 @@ rule KernelArchitectureSetup architecture
 	HAIKU_KERNEL_PIC_LINKFLAGS = ;
 	HAIKU_KERNEL_ADDON_LINKFLAGS = ;
 
+	# Include embedded board-specific file.
+	if $(HAIKU_BOOT_BOARD) {
+		include [ FDirName $(HAIKU_BUILD_RULES_DIR) board $(HAIKU_BOOT_BOARD)
+			BoardSetup ] ;
+		if $(HAIKU_BOARD_LOADER_BASE) {
+			HAIKU_BOOT_LDFLAGS +=
+				--defsym BOARD_LOADER_BASE=$(HAIKU_BOARD_LOADER_BASE) ;
+		}
+	}
+
 	switch $(cpu) {
 		case ppc :
 			# Build a position independent PPC kernel. We need to be able to
@@ -401,10 +406,20 @@ rule KernelArchitectureSetup architecture
 			HAIKU_KERNEL_PIC_LINKFLAGS += -z max-page-size=0x1000 ;
 			HAIKU_KERNEL_ADDON_LINKFLAGS += -z max-page-size=0x1000 ;
 
-			# Bootloader is 32-bit.
-			HAIKU_BOOT_LINKFLAGS += -m elf_i386_haiku ;
-			HAIKU_BOOT_CCFLAGS += -m32 -march=pentium ;
-			HAIKU_BOOT_C++FLAGS += -m32 -march=pentium ;
+			# BIOS Bootloader is 32-bit.
+			if $(HAIKU_BOOT_PLATFORM) = bios_ia32 {
+				HAIKU_BOOT_LINKFLAGS += -m elf_i386_haiku ;
+				HAIKU_BOOT_CCFLAGS += -m32 -march=pentium ;
+				HAIKU_BOOT_C++FLAGS += -m32 -march=pentium ;
+			}
+	}
+
+	if $(HAIKU_BOOT_PLATFORM) = efi {
+		HAIKU_BOOT_CCFLAGS += -fpic -fno-stack-protector -fPIC -fshort-wchar -mno-red-zone
+			-maccumulate-outgoing-args -Wno-error=unused-variable ;
+		HAIKU_BOOT_C++FLAGS += -fpic -fno-stack-protector -fPIC -fshort-wchar -mno-red-zone
+			-maccumulate-outgoing-args -Wno-error=unused-variable ;
+		HAIKU_BOOT_LDFLAGS = -Bstatic -Bsymbolic -shared -nostdlib -znocombreloc -nostartfiles ;
 	}
 
 	# warning flags

build/jam/BootRules

@@ -47,7 +47,7 @@ rule BootLd
 
 	LINK on $(1) = $(TARGET_LD_$(TARGET_PACKAGING_ARCH)) ;
 
-	LINKFLAGS on $(1) = $(4) ;
+	LINKFLAGS on $(1) = $(TARGET_BOOT_LINKFLAGS) $(4) ;
 	if $(3) { LINKFLAGS on $(1) += --script=$(3) ; }
 
 	# Remove any preset LINKLIBS, but link against libgcc.a. Linking against

build/jam/BuildFeatures

@@ -571,6 +571,23 @@ if [ IsPackageAvailable expat_devel ] {
 }
 
 
+# gnu-efi
+if $(TARGET_PACKAGING_ARCH) = x86_64 {
+	if [ IsPackageAvailable gnuefi ] {
+		ExtractBuildFeatureArchives gnuefi :
+			file: base gnuefi
+				headers: $(developHeadersDir)/gnuefi
+				headersProtocol: $(developHeadersDir)/gnuefi/protocol
+				headersArch: $(developHeadersDir)/gnuefi/$(TARGET_ARCH)
+				libdir: $(libDir)/gnuefi
+			;
+
+		EnableBuildFeatures gnuefi ;
+	} else {
+		Echo "gnuefi support not available on $(TARGET_PACKAGING_ARCH)" ;
+	}
+}
+
 # GPL add-ons
 if $(HAIKU_INCLUDE_GPL_ADDONS) = 1 {
 	EnableBuildFeatures gpl ;

build/jam/BuildSetup

@@ -649,7 +649,7 @@ local buildVars =
 
 	KERNEL_CCFLAGS KERNEL_C++FLAGS
 	KERNEL_PIC_CCFLAGS KERNEL_PIC_LINKFLAGS KERNEL_ADDON_LINKFLAGS
-	BOOT_CCFLAGS BOOT_C++FLAGS BOOT_LINKFLAGS
+	BOOT_CCFLAGS BOOT_C++FLAGS BOOT_LINKFLAGS BOOT_LDFLAGS
 
 	KERNEL_WARNING_CCFLAGS KERNEL_WARNING_C++FLAGS