Cortex-M7——ARMCC编译器

Cortex-M7——ARMCC编译器

小狼@http://blog.youkuaiyun.com/xiaolangyangyang

---

一、链接脚本（ld.scat）

IRAM 0x00000000 0x80000
{
    IRAM 0x00000000 0x80000
    {
        *.o (.isr_vector, +First)
        *(InRoot$$Sections)
        .ANY (+RO)
        .ANY (+XO)
    }

    DRAM 0x20000000 0x20000
    {
        .ANY (+RW +ZI)
    }

    ARM_LIB_STACKHEAP 0x0 EMPTY 0
    {
    }
}

二、启动代码

  .syntax unified
  .cpu cortex-m7
  .fpu softvfp
  .thumb

.global  g_pfnVectors
.global  Default_Handler

.word  Load$$DRAM$$Base
.word  Image$$DRAM$$Base
.word  Image$$DRAM$$Length

.word  Image$$DRAM$$ZI$$Base
.word  Image$$DRAM$$ZI$$Length

  .section  .text.Reset_Handler
  .type  Reset_Handler, %function
Reset_Handler:
  ldr   sp, =0x20020000      /* set stack pointer */
  movs  r1, #0
  b  LoopCopyDataInit

CopyDataInit:
  ldr  r3, =Load$$DRAM$$Base
  ldr  r3, [r3, r1]
  str  r3, [r0, r1]
  adds  r1, r1, #4

LoopCopyDataInit:
  ldr  r0, =Image$$DRAM$$Base
  ldr  r3, =Image$$DRAM$$Length
  adds  r2, r0, r1
  cmp  r1, r3
  bcc  CopyDataInit /* if r1 < r3, then jump to CopyDataInit */
  movs  r1, #0
  b  LoopFillZerobss

FillZerobss:
  movs  r3, #0
  str  r3, [r2, r1]
  adds  r1, r1, #4

LoopFillZerobss:
  ldr  r2, =Image$$DRAM$$ZI$$Base
  ldr  r3, =Image$$DRAM$$ZI$$Length
  cmp  r1, r3
  bcc  FillZerobss

  bl  SystemInit
  bl  main
  bx  lr

  .size  Reset_Handler, .-Reset_Handler /* equ mov pc lr (lr=r14) */

  .section  .text.Default_Handler,"ax",%progbits
  .type  Reset_Handler, %function
Default_Handler:
  b  Default_Handler
  .size  Default_Handler, .-Default_Handler

  .section  .isr_vector,"a",%progbits
  .type  g_pfnVectors, %object
g_pfnVectors:
  .word  0x20020000
  .word  Reset_Handler
  .word  Default_Handler
  .word  Default_Handler
  .word  Default_Handler
  .word  Default_Handler
  .word  Default_Handler
  .word  0
  .word  0
  .word  0
  .word  0
  .word  Default_Handler
  .word  Default_Handler
  .word  0
  .word  Default_Handler
  .word  SysTick_Handler
  .word  Default_Handler       /* int 0 */
  .word  Default_Handler       /* int 1 */
  .word  Default_Handler       /* int 2 */
  .word  Default_Handler       /* int 3 */
  .word  Default_Handler       /* int 4 */
  .word  0                     /* int 5 Reserved */
  .word  0                     /* int 6 Reserved */
  .word  Default_Handler       /* int 7 */
  .word  Default_Handler       /* int 8 */
  .word  Default_Handler       /* int 9 */
  .word  Default_Handler       /* int 10 */
  .word  Default_Handler       /* int 11 */
  .word  Default_Handler       /* int 12 */
  .word  Default_Handler       /* int 13 */
  .word  Default_Handler       /* int 14 */
  .word  Default_Handler       /* int 15 */
  .word  Default_Handler       /* int 16 */
  .word  Default_Handler       /* int 17 Float Point */
  .word  Default_Handler       /* int 18 */
  .word  Default_Handler       /* int 19 */
  .word  Default_Handler       /* int 20 */
  .size  g_pfnVectors, .-g_pfnVectors

三、Makefile

TESTTOPDIR = $(CURDIR)

-include $(TESTTOPDIR)/config.mk

TEST_TARGET = test

OUT = $(TESTTOPDIR)/out
BUILD = $(OUT)/obj
OBJS_LIST_FILE = $(OUT)/objs.list
OBJS_DEF_FILE  = $(OUT)/objs.mk

OBJ_MKDIR = if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi

define add_obj_to_list_file
	$(if $(1), @echo $(1) >> $(OBJS_LIST_FILE))
endef

define update_from_obj_list_file
    $(eval ALL_OBJS := $(shell cat $(OBJS_LIST_FILE)))
    @$(RM) $(OBJS_LIST_FILE)
    @echo "ALL_OBJS := " $(ALL_OBJS) > $(OBJS_DEF_FILE)
endef

LOCAL_SRCS = \
    $(TESTTOPDIR)/src/main.c                           \
    $(TESTTOPDIR)/src/nvic.c                           \
    $(TESTTOPDIR)/src/it.c                             \
    $(TESTTOPDIR)/src/startup.s

LOCAL_INCLUDE := \
    -I $(TESTTOPDIR)/inc \
    -I $(TESTTOPDIR)/hal \
    -I $(TESTTOPDIR)/driver/inc

OBJOUT := $(BUILD)$(dir $(subst $(TESTTOPDIR),,$(shell pwd)))

LOCAL_SRCS     := $(subst $(CURDIR)/, , $(LOCAL_SRCS))
LOCAL_CSRCS    := $(filter %.c, $(LOCAL_SRCS))
LOCAL_ASMSRCS2 := $(filter %.s, $(LOCAL_SRCS))
LOCAL_COBJS    := $(patsubst %.c, $(OBJOUT)/%.o, $(LOCAL_CSRCS))
LOCAL_ASMOBJS2 := $(patsubst %.s, $(OBJOUT)/%.o, $(LOCAL_ASMSRCS2))
LOCAL_OBJS     := $(LOCAL_COBJS) $(LOCAL_ASMOBJS2)

.PHONY: clean $(TEST_TARGET) $(TEST_BUILD) ADD_OBJ_LIST $(OBJOUT)

TEST_BUILD: ADD_OBJ_LIST
	@echo "start code compile..."

$(TEST_TARGET): clean TEST_BUILD
	$(call update_from_obj_list_file)
	$(LD) $(ALL_OBJS) --scatter=$(TESTTOPDIR)/lsp/ld.scat -o $(OUT)/$@.elf --lto

	$(OBJCOPY) -O ihex $(OUT)/$@.elf $(OUT)/$@.hex
	$(FROMELF) --bin $(OUT)/$@.elf -o $(OUT)/$@.bin
	$(FROMELF) -c $(OUT)/$@.elf -o $(OUT)/$@.asm
	$(SIZE) $(OUT)/$@.elf


ADD_OBJ_LIST: $(LOCAL_OBJS)
	if [ ! -d $(dir $(OUT)) ]; then mkdir -p $(dir $(OUT)); fi
	$(call add_obj_to_list_file,$(LOCAL_OBJS))

$(OBJOUT)/%.o: %.c
	@$(OBJ_MKDIR)
	$(CC) $(LOCAL_INCLUDE) -Wno-unused-function -flto \
		-O3 -Wall -Werror -Wformat -mthumb -g -gdwarf-2 \
		-Wpointer-arith -mfloat-abi=hard -mfpu=fpv5-d16 \
		--target=arm-arm-none-eabi \
		-mcpu=cortex-m7 -c \
		-Wa, $< -o $@ \
		-Wno-error -w

$(OBJOUT)/%.o: %.s
	@$(OBJ_MKDIR)
	$(CC) $(LOCAL_INCLUDE) -Wno-unused-function -flto \
		-O3 -Wall -Werror -Wformat -mthumb -g -gdwarf-2 \
		-Wpointer-arith -mfloat-abi=hard -mfpu=fpv5-d16 \
		--target=arm-arm-none-eabi \
		-mcpu=cortex-m7 -c \
		-Wa, $< -o $@ \
		-Wno-error -w

clean:
	-rm -rf $(OUT)/*