之前的分析android和标准linux在编译器的差别，那么是标准编译器编译的bin文件是否可以在andorid上运行的。

一 先看一下elf文件动态链接原理

下面一个android bin为例，通过readelf -l命令，

readelf -l pppd

Elf file type is DYN (Shared object file)
Entry point 0x9b20
There are 9 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  PHDR           0x0000000000000040 0x0000000000000040 0x0000000000000040
                 0x00000000000001f8 0x00000000000001f8  R      8
  INTERP         0x0000000000000238 0x0000000000000238 0x0000000000000238
                 0x0000000000000015 0x0000000000000015  R      1
      [Requesting program interpreter: /system/bin/linker64]
  LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x0000000000036bcc 0x0000000000036bcc  R E    10000

再看标准的linux加载器

 readelf -l rm

Elf file type is EXEC (Executable file)
Entry point 0x402084
There are 9 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  PHDR           0x0000000000000040 0x0000000000400040 0x0000000000400040
                 0x00000000000001f8 0x00000000000001f8  R E    8
  INTERP         0x0000000000000238 0x0000000000400238 0x0000000000400238
                 0x000000000000001c 0x000000000000001c  R      1
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]

通过INTERP 段的区别，android使用linker程序，而标准Linux使用的是ld-linux.so这个so，内核分析它的.interp段，也就是linker或者ld-linux.so，将动态连接器映射到进程的地址空间，然后将控制权交给动态链接。

二 示例

将arm-linux-gnueabi下的ld-linux.so.3和libc.so.6 copy到android平台的/lib下
root@sp9820e_2h10:/lib # ls
ld-linux.so.3
libc.so.6
运行helloworld,添加/lib到LD_LIBRARY_PATH，运行成功

/lib # a.out
a.out: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
/lib # export LD_LIBRARY_PATH=/lib:$LD_LIBRARY_PATH
:/lib # a.out
hello world!