target/linux/image/generic/lzma-loader/src/Makefile

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