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LOADADDR = 0x80400000 # RAM start + 4M
KERNEL_ENTRY = 0x80001000
RAMSIZE = 0x00100000 # 1MB
CROSS_COMPILE = mips-linux-
.S.s:
$(CPP) $(CFLAGS) $< -o $*.s
.S.o:
$(CC) $(CFLAGS) -c $< -o $*.o
.c.o:
$(CC) $(CFLAGS) -c $< -o $*.o
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
CFLAGS = -fno-builtin -Os -G 0 -mno-abicalls -fno-pic -Wall -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY} -D_LZMA_IN_CB
# CFLAGS = -fno-builtin -Os -G 0 -mno-abicalls -fno-pic -Wall -DRAMSIZE=${RAMSIZE}
O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
# Drop some uninteresting sections in the kernel.
# This is only relevant for ELF kernels but doesn't hurt a.out
drop-sections = .reginfo .mdebug .comment
strip-flags = $(addprefix --remove-section=,$(drop-sections))
all : lzma.elf
lzma.lds: lzma.lds.in
sed -e 's,@LOADADDR@,$(LOADADDR),g' $< >$@
kernel.o: vmlinux.lzma lzma.lds
$(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
lzma.elf: start.o decompress.o LzmaDecode.o kernel.o
$(LD) -s -Tlzma.lds -o $@ $^
clean:
rm -f *.o lzma.elf
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