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Question

我有一个带arm920t cpu（AT91RM9200）的板。在目标Linux上：

int revisedStrcmp(char *s1, char *s2) {
    int i = 0, n = 0, p = 0;

    if (s1[i] == '\0' && s2[i] != '\0') //s1 shorter than s2
        return -1;

    else if (s1[i] != '\0' && s2[i] == '\0') //s1 longer than s2
        return 1;

    else if (s1[i] != '\0' && s2[i] != '\0')  //both not equal to null
    {
        if (s1[i] > s2[i])  n += 1; //s1
        else if (s1[i] < s2[i]) p += 1; //s2
        else
        {
           n += 1; //s1
           p += 1; //s2
        }
        i += 1;
        return revisedStrcmp(s1, s2);
    }
    else    //if s1[i] & s2[i] are null
    {
        if (n > p) //s1 > s2
            return 1;
        else if (n < p)
            return -1;
        else
            return 0;
    }
}

在我的主机上，我使用虚拟机Ubuntu 18.04作为系统进行交叉编译。在我的Ubuntu上，我有2个用于交叉编译的软件包：

arm-linux-gnueabi
arm-none-eabi

尝试构建简单的问候世界

包括

root@test-device:/home/andy # uname -a
Linux test-device 2.6.21.201509.01 #13 Wed Jun 22 11:06:51 EEST 2016 armv4tl unknown

我在每个包装中都这样做

int main()
{
    printf("Hello world\n");
    return 0;
}

在两种情况下，我都有2个二进制可执行文件 readelf和文件工具说：

1. supersonic@ubuntu-vBox:~$ arm-linux-gnueabi-gcc -o hello_arm hello.c -static
2. supersonic@ubuntu-vBox:~$ arm-none-eabi-gcc -o hello_arm_none-eabi hello.c --specs=nosys.specs

将两个文件都上传到目标计算机，设置了执行权限

1. (arm-linux-gnueabi)
supersonic@ubuntu-vBox:~$ readelf -h hello_arm
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           ARM
  Version:                           0x1
  Entry point address:               0x101a0
  Start of program headers:          52 (bytes into file)
  Start of section headers:          501788 (bytes into file)
  Flags:                             0x5000200, Version5 EABI, soft-float ABI
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         7
  Size of section headers:           40 (bytes)
  Number of section headers:         30
  Section header string table index: 29
supersonic@ubuntu-vBox:~$ 

supersonic@ubuntu-vBox:~$ file hello_arm
hello_arm: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, for GNU/Linux 3.2.0, BuildID[sha1]=15d06e43de8c8d13d7e0110e311532a9187ca9e5, not stripped

2. (arm-none-eabi)

    supersonic@ubuntu-vBox:~$ readelf -h hello_arm_none-eabi 
    ELF Header:
      Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
      Class:                             ELF32
      Data:                              2's complement, little endian
      Version:                           1 (current)
      OS/ABI:                            UNIX - System V
      ABI Version:                       0
      Type:                              EXEC (Executable file)
      Machine:                           ARM
      Version:                           0x1
      Entry point address:               0x8148
      Start of program headers:          52 (bytes into file)
      Start of section headers:          186056 (bytes into file)
      Flags:                             0x5000200, Version5 EABI, soft-float ABI
      Size of this header:               52 (bytes)
      Size of program headers:           32 (bytes)
      Number of program headers:         3
      Size of section headers:           40 (bytes)
      Number of section headers:         27
      Section header string table index: 24

    supersonic@ubuntu-vBox:~$ file hello_arm_none-eabi 
    hello_arm_none-eabi: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, with debug_info, not stripped

当我尝试启动每个二进制文件时，得到以下结果

（arm-linux-gnueabi）

root @ test-device：/ home / andy＃./hello_arm 非法指示
（arm-none-eabi）

root @ test-device：/ home / andy＃./hello_arm_none-eabi 分割错误

在目标计算机上，找到旧的工作二进制文件，但开发人员在当前时间完成了工作无法使用，他的联系丢失了

这是工作二进制文件 readelf和文件工具对此进行了说明：

root@test-device:/home/andy # chmod +x hello_arm
root@test-device:/home/andy # chmod +x hello_arm_none-eabi

也可以尝试使用选项构建我的“ hello world”
1. supersonic@ubuntu-vBox:~$ readelf -h /media/share_rw/MTXReader ELF Header: Magic: 7f 45 4c 46 01 01 01 61 00 00 00 00 00 00 00 00 Class: ELF32 Data: 2's complement, little endian Version: 1 (current) OS/ABI: ARM ABI Version: 0 Type: EXEC (Executable file) Machine: ARM Version: 0x1 Entry point address: 0xab1c Start of program headers: 52 (bytes into file) Start of section headers: 681968 (bytes into file) Flags: 0x2, GNU EABI, <unknown> Size of this header: 52 (bytes) Size of program headers: 32 (bytes) Number of program headers: 8 Size of section headers: 40 (bytes) Number of section headers: 38 Section header string table index: 35 supersonic@ubuntu-vBox:~$ file /media/share_rw/MTXReader /media/share_rw/MTXReader: ELF 32-bit LSB executable, ARM, version 1 (ARM), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.0.10, with debug_info, not stripped
2. supersonic@ubuntu-vBox:~$ arm-linux-gnueabi-gcc -o hello_arm hello.c -static -mcpu=arm920t -march=armv4t
但结果相同

有人知道为什么会这样吗？怎么办？

分段故障ARM交叉符合Linux Arm920t

包括

0 个答案: