| 1 | # |
| 2 | # Copyright (C) 2006 OpenWrt.org |
| 3 | # |
| 4 | # This is free software, licensed under the GNU General Public License v2. |
| 5 | # See /LICENSE for more information. |
| 6 | # |
| 7 | RAMSTART = 0x80000000 |
| 8 | RAMSIZE = 0x00100000 # 1MB |
| 9 | LOADADDR = 0x80400000 # RAM start + 4M |
| 10 | KERNEL_ENTRY = 0x80001000 |
| 11 | IMAGE_COPY:=0 |
| 12 | |
| 13 | CROSS_COMPILE = mips-linux- |
| 14 | |
| 15 | OBJCOPY:= $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S |
| 16 | CFLAGS := -fno-builtin -Os -G 0 -ffunction-sections -mno-abicalls -fno-pic -mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap -Wall -DRAMSTART=${RAMSTART} -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY} -D_LZMA_IN_CB |
| 17 | ifeq ($(IMAGE_COPY),1) |
| 18 | CFLAGS += -DLOADADDR=${LOADADDR} -DIMAGE_COPY=1 |
| 19 | endif |
| 20 | |
| 21 | .S.s: |
| 22 | $(CPP) $(CFLAGS) $< -o $*.s |
| 23 | .S.o: |
| 24 | $(CC) $(CFLAGS) -c $< -o $*.o |
| 25 | .c.o: |
| 26 | $(CC) $(CFLAGS) -c $< -o $*.o |
| 27 | |
| 28 | CC = $(CROSS_COMPILE)gcc |
| 29 | LD = $(CROSS_COMPILE)ld |
| 30 | OBJDUMP = $(CROSS_COMPILE)objdump |
| 31 | |
| 32 | O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32) |
| 33 | |
| 34 | # Drop some uninteresting sections in the kernel. |
| 35 | # This is only relevant for ELF kernels but doesn't hurt a.out |
| 36 | drop-sections = .reginfo .mdebug .comment |
| 37 | strip-flags = $(addprefix --remove-section=,$(drop-sections)) |
| 38 | |
| 39 | all : lzma.elf lzma.bin |
| 40 | |
| 41 | lzma.lds: lzma.lds.in |
| 42 | sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,_start,g' $< >$@ |
| 43 | |
| 44 | kernel.o: vmlinux.lzma lzma.lds |
| 45 | $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $< |
| 46 | |
| 47 | lzma.bin: lzma.elf |
| 48 | $(OBJCOPY) $< $@ |
| 49 | |
| 50 | ifeq ($(IMAGE_COPY),1) |
| 51 | LOADER_ENTRY ?= $(KERNEL_ENTRY) |
| 52 | lzma.o: decompress.o LzmaDecode.o kernel.o |
| 53 | sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,entry,g' lzma.lds.in >lzma-stage2.lds |
| 54 | $(LD) -static --no-warn-mismatch -e entry -Tlzma-stage2.lds -o temp-$@ $^ |
| 55 | $(OBJCOPY) temp-$@ lzma.tmp |
| 56 | @echo "SECTIONS { .data : { code_start = .; *(.data) code_stop = .; }}" > lzma-data.lds |
| 57 | $(LD) -no-warn-mismatch -T lzma-data.lds -r -o $@ -b binary lzma.tmp --oformat $(O_FORMAT) |
| 58 | |
| 59 | lzma.elf: start.o lzma.o |
| 60 | sed -e 's,@LOADADDR@,$(LOADER_ENTRY),g' lzma-copy.lds.in >lzma-copy.lds |
| 61 | $(LD) -s -Tlzma-copy.lds -o $@ $^ |
| 62 | else |
| 63 | lzma.elf: start.o decompress.o LzmaDecode.o kernel.o |
| 64 | $(LD) -s -Tlzma.lds -o $@ $^ |
| 65 | endif |
| 66 | |
| 67 | clean: |
| 68 | rm -f *.o lzma.elf lzma.bin *.tmp *.lds |
| 69 | |
