Miyoo

如何使用J-Link GDB Server和IDA Pro除錯程式

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參考資訊：
1. jtag_pdf
2. whycan_jtag
3. whycan_pinout
4. jtag_allwinner_f1c100s.cfg

F1C100S JTAG腳位(和MicroSD共用腳位)

TMS	PF0, SDC0_D1
TDI	PF1, SDC0_D0
TDO	PF3, SDC0_CMD
TCK	PF5, SDC0_D2

連接J-Link


main.s

  .global _start
    
  .equiv GPIO_BASE, 0x01c20800
  .equiv PA,        (0 * 0x24)
  .equiv PORT_CFG0, 0x00
  .equiv PORT_DATA, 0x10
     
  .arm
  .text
_start:
  b reset
  b .
  b .
  b .
  b .
  b .
  b .
  b .
     
reset:
  ldr r0, =GPIO_BASE
  ldr r1, =0x10
  str r1, [r0, #(PA + PORT_CFG0)]
   
0:
  eor r1, #0x02
  str r1, [r0, #(PA + PORT_DATA)]
  b 0b
  .end

main.ld

MEMORY {
  ram : ORIGIN = 0, LENGTH = 32K
}

SECTIONS {
  text : {
    *(.text*)
  } > ram
}

編譯

$ arm-none-eabi-as -mcpu=arm9 -o main.o main.s
$ arm-none-eabi-ld -T main.ld -o main.elf main.o
$ arm-none-eabi-objcopy -O binary main.elf main.bin

下載程式到RAM(loadbin c:\main.bin 0)


開啟J-Link GDB Server(Init registers記得勾選)


選擇ARM 9


Listening on TCP/IP port 2331


IDA Pro載入main.bin


按下F9，選擇Remote GDB debugger


按下F9，輸入localhost 2331


接著就可以開始除錯程式

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