#Makefile for building vmlinux with relocatable information and code.

all: vmlinux.reloc

obj 	:= arch/powerpc

AS	= as
LD	= ld
CC	= gcc
CPP	= $(CC) -E

#build userspace relocs program to extract list of relocation offsets
$(obj)/relocs : $(obj)/relocs.c
	$(CC) $(obj)/relocs.c -o $(obj)/relocs

#extract list of relocation offsets
$(obj)/vmlinux.reloc.offsets : vmlinux $(obj)/relocs
	$(obj)/relocs vmlinux > $(obj)/vmlinux.reloc.offsets 2>/dev/null

#binary format of vmlinux
$(obj)/vmlinux.bin: vmlinux
	objcopy -O binary -R .note -R .comment -S vmlinux $(obj)/vmlinux.bin

#concatenate vmlinux binary and relocation offset
$(obj)/vmlinux.bin.all : $(obj)/vmlinux.bin $(obj)/vmlinux.reloc.offsets
	cat $(obj)/vmlinux.bin $(obj)/vmlinux.reloc.offsets > $(obj)/vmlinux.bin.all

#generate elf headers for the concatenated vmlinux binary and relocation offset
$(obj)/vmlinux.reloc.elf : $(obj)/vmlinux.reloc.scr $(obj)/vmlinux.bin.all
	$(LD) -m elf64ppc -r --format binary --oformat elf64-powerpc -T $(obj)/vmlinux.reloc.scr $(obj)/vmlinux.bin.all -o $(obj)/vmlinux.reloc.elf

#build the wrapper around kernel
$(obj)/kernel/reloc_apply.o : $(obj)/kernel/reloc_apply.S
	$(CC) -m64 -Wp,-MD,arch/powerpc/kernel/.reloc_apply.o.d  -nostdinc -isystem /usr/lib/gcc/powerpc64-suse-linux/4.1.2/include -D__KERNEL__ -Iinclude  -include include/linux/autoconf.h  -D__ASSEMBLY__  -Wa,-maltivec     -c -o arch/powerpc/kernel/reloc_apply.o arch/powerpc/kernel/reloc_apply.S

#linker script
$(obj)/vmlinux.reloc.lds : $(obj)/vmlinux.reloc.lds.S
	$(CC) -m64 -E -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Os -msoft-float -pipe -mminimal-toc -mtraceback=none  -mcall-aixdesc -mtune=power4 -mno-altivec -mno-spe -funit-at-a-time -mno-string -Wa,-maltivec -fomit-frame-pointer  -fno-stack-protector -Wdeclaration-after-statement -Wno-pointer-sign -Wp,-MD,arch/powerpc/.vmlinux.reloc.lds.d  -nostdinc -isystem /usr/lib/gcc/powerpc64-suse-linux/4.1.2/include -D__KERNEL__ -Iinclude  -include include/linux/autoconf.h    -Upowerpc -P -C -Upowerpc -D__ASSEMBLY__ -o arch/powerpc/vmlinux.reloc.lds arch/powerpc/vmlinux.reloc.lds.S

#build the relocatable vmlinux from vmlinux and relocatable kernel wrapper
vmlinux.reloc : $(obj)/vmlinux.reloc.lds $(obj)/vmlinux.reloc.elf $(obj)/kernel/reloc_apply.o
	$(LD) -m elf64ppc -T $(obj)/vmlinux.reloc.lds $(obj)/vmlinux.reloc.elf $(obj)/kernel/reloc_apply.o -o vmlinux.reloc