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CROSS_COMPILE = arm-none-eabi-
# Use our cross-compile prefix to set up our basic cross compile environment.
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy
CFLAGS = \
-mtune=arm7tdmi \
-mlittle-endian \
-fno-stack-protector \
-fno-common \
-fno-builtin \
-ffreestanding \
-std=gnu99 \
-Werror \
-Wall \
-Wno-error=unused-function \
-fomit-frame-pointer \
-g \
-Os \
LDFLAGS =
all: intermezzo.bin
# The new address of the Intermezzo after copy
INTERMEZZO_RELOCATED_ADDRESS := 0x4000F000
# The address to which Intermezzo is to be loaded by the payload launcher.
INTERMEZZO_ADDRESS := 0x40010000
# The address we want the final payload to be located at.
RELOCATION_TARGET := 0x40010000
# The addrss and length of the data loaded by f-g.
PAYLOAD_START_ADDR := 0x40010E40
STACK_SPRAY_START := 0x40014E40
STACK_SPRAY_END := 0x40017000
BEFORE_SPRAY_LENGTH := $(shell echo $$(( $(STACK_SPRAY_START) - $(PAYLOAD_START_ADDR) )))
AFTER_SPRAY_LENGTH := 0x30000
ENTRY_POINT_ADDRESS := 0x40010000
# Provide the definitions used in the intermezzo stub.
DEFINES := \
-DINTERMEZZO_RELOCATED_ADDRESS=$(INTERMEZZO_RELOCATED_ADDRESS) \
-DRELOCATION_TARGET=$(RELOCATION_TARGET) \
-DPAYLOAD_START_ADDR=$(PAYLOAD_START_ADDR) \
-DSTACK_SPRAY_START=$(STACK_SPRAY_START) \
-DSTACK_SPRAY_END=$(STACK_SPRAY_END) \
-DBEFORE_SPRAY_LENGTH=$(BEFORE_SPRAY_LENGTH) \
-DAFTER_SPRAY_LENGTH=$(AFTER_SPRAY_LENGTH) \
-DENTRY_POINT_ADDRESS=$(ENTRY_POINT_ADDRESS)
intermezzo.elf: intermezzo.o
$(LD) -T intermezzo.lds --defsym LOAD_ADDR=$(INTERMEZZO_ADDRESS) $(LDFLAGS) $^ -o $@
intermezzo.o: intermezzo.S
$(CC) $(CFLAGS32) $(DEFINES) $< -c -o $@
%.bin: %.elf
$(OBJCOPY) -v -O binary $< $@
clean:
rm -f *.o *.elf *.bin
.PHONY: all clean