我目前正在实现一个elf加载器来模拟unicorn engine的二进制文件。为了避免实现我自己的动态链接器，我加载ld-linux-x86-64.so.2（进入unicorn引擎）并使用我的动态链接可执行文件的路径执行它。现在我的问题来了：
我将动态链接器二进制文件（/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2）加载到内存中并使用我的可执行文件的路径启动它（基本上是printf（＆＃34） ; Hello World＆＃34;））。在加载程序加载可执行文件和libc后，以下内容将打印到stdout：
./executable: ./executable: no version information available (required by ./executable)
./executable: relocation error: ./executable: symbol __libc_start_main, version GLIBC_2.2.5 not defined in file libc.so.6 with link time reference
我从我编译hello_world程序的系统中复制了二进制文件（ld和libc）。它在我执行二进制文件时有效：
$ /lib/x86_64-linux-gnu/ld-2.21.so ./executable
Hello World
知道为什么这不起作用？知道我应该在哪里寻找我的错误吗？ （注意我正在使用我的自定义加载器）
这是＆＃39; strace＆＃39;在unicorn-engine中运行的加载器，希望能够正确执行（我需要模拟内核）。
sys_brk(0x0)
sys_open(./executable)
sys_read(3, 0x7fff6c844868, 832)
sys_fstat(3, 0x7fff6c844718)
sys_getcwd(0x8888888800225738, 128)
sys_mmap2(0x400000, 4096, 5, 2066, 3, 0)
sys_mmap2(0x600000, 8192, 3, 2066, 3, 0)
sys_close(3)
sys_uname(0x7fff6c844a22)
sys_access(/etc/ld.so.nohwcap, 0)
sys_mmap2(0x0, 8192, 3, 34, -1, 0)
sys_access(/etc/ld.so.preload, 4)
sys_open(/etc/ld.so.cache)
sys_open(/lib/x86_64-linux-gnu/tls/x86_64/libc.so.6)
sys_stat(/lib/x86_64-linux-gnu/tls/x86_64, 140735013995640)
sys_open(/lib/x86_64-linux-gnu/tls/libc.so.6)
sys_stat(/lib/x86_64-linux-gnu/tls, 140735013995640)
sys_open(/lib/x86_64-linux-gnu/x86_64/libc.so.6)
sys_stat(/lib/x86_64-linux-gnu/x86_64, 140735013995640)
sys_open(/lib/x86_64-linux-gnu/libc.so.6)
sys_read(4, 0x7fff6c8445c8, 832)
sys_fstat(4, 0x7fff6c844478)
sys_close(4)
sys_writev(2, 7fff6c844538, 6)
=> ./executable: ./executable: no version information available (required by ./executable)
sys_mmap2(0x0, 4096, 3, 34, -1, 0)
sys_arch_prctl(4098, 0x6555555500001fc0)
sys_mprotect(0x600000, 4096, 1)
sys_writev(2, 7fff6c844220, 10)
=> ./executable: relocation error: ./executable: symbol __libc_start_main, version GLIBC_2.2.5 not defined in file libc.so.6 with link time reference
sys_exit(127)
机器上的strace我编译了二进制文件：
$ strace /lib/x86_64-linux-gnu/ld-2.21.so ./dynamic_x86_64_print_args
execve("/lib/x86_64-linux-gnu/ld-2.21.so", ["/lib/x86_64-linux-gnu/ld-2.21.so", "./dynamic_x86_64_print_args"], [/* 23 vars */]) = 0
brk(0) = 0x5636dd9f3000
open("./dynamic_x86_64_print_args", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\2\0>\0\1\0\0\0@\4@\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=8528, ...}) = 0
getcwd("/vagrant/tdb/static", 128) = 20
mmap(0x400000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0x400000
mmap(0x600000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0x600000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc3a45e1000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
// ...
// SNIP 100 tries to load the libc.so.6 that is not there
// ...
open("/home/vagrant/villoc/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/home/vagrant/villoc", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=55962, ...}) = 0
mmap(NULL, 55962, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc3a45d3000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\v\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc3a4209000
mprotect(0x7fc3a43c9000, 2097152, PROT_NONE) = 0
mmap(0x7fc3a45c9000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7fc3a45c9000
mmap(0x7fc3a45cf000, 16128, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc3a45cf000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc3a4208000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc3a4207000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc3a4206000
arch_prctl(ARCH_SET_FS, 0x7fc3a4207700) = 0
mprotect(0x7fc3a45c9000, 16384, PROT_READ) = 0
mprotect(0x600000, 4096, PROT_READ) = 0
mprotect(0x5636dba3b000, 4096, PROT_READ) = 0
munmap(0x7fc3a45d3000, 55962) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc3a45e0000
write(1, "arg 0 ./dynamic_x86_64_print_arg"..., 34arg 0 ./dynamic_x86_64_print_args
) = 34
exit_group(0) = ?
+++ exited with 0 +++