掌機 - TRIMUI - 如何使用J-Link GDB Server和IDA Pro除錯程式

參考資訊：
https://whycan.com/t_1003.html
https://whycan.com/t_2025.html
https://whycan.com/files/members/3/TF_SDNAND_JTAG_V002.pdf
https://github.com/nminaylov/F1C100s_info/blob/master/JTAG/allwinner_f1c100s.cfg

F1C200S JTAG腳位(和MicroSD共用腳位)

連接J-Link


main.s

    .global _start
    
    .equiv GPIO_BASE, 0x01c20800 
    .equiv PE,        (4 * 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, =0x100000
    str r1, [r0, #(PE + PORT_CFG0)]
   
0:
    eor r1, #0x20
    str r1, [r0, #(PE + 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