user: 请从给定的汇编指令推导出C源代码:

```asm
<eiki_attach_debugger>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0xffffffff,-0x48(%rbp)
  movq   $0x0,-0x40(%rbp)
  movq   $0x0,-0x38(%rbp)
  movq   $0x0,-0x30(%rbp)
  movq   $0x0,-0x28(%rbp)
  mov    $0x0,%eax
  call   <eiki_is_debugged@plt>
  test   %rax,%rax
  jle    L102
  mov    $0xfffffffe,%eax
  jmp    L1
L102:
  lea    D34(%rip),%rax
  mov    %rax,%rdi
  call   <eiki_strlen@plt>
  add    $0x1,%eax
  mov    %eax,%edi
  call   <eiki_malloc@plt>
  mov    %rax,-0x40(%rbp)
  mov    -0x40(%rbp),%rax
  test   %rax,%rax
  je     L4
  mov    -0x40(%rbp),%rax
  lea    D34(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <eiki_strcpy@plt>
  mov    $0x20,%edi
  call   <eiki_malloc@plt>
  mov    %rax,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  test   %rax,%rax
  je     L14
  mov    -0x38(%rbp),%rax
  lea    D25(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <eiki_strcpy@plt>
  mov    $0x0,%eax
  call   <getpid@plt>
  mov    %eax,-0x44(%rbp)
  lea    -0x20(%rbp),%rdx
  mov    -0x44(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <eiki_pid_to_str@plt>
  mov    -0x38(%rbp),%rax
  lea    -0x20(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <eiki_strcat@plt>
  mov    -0x38(%rbp),%rax
  lea    D44(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <eiki_strcat@plt>
  mov    $0x10,%edi
  call   <eiki_malloc@plt>
  mov    %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  test   %rax,%rax
  je     L97
  mov    -0x30(%rbp),%rax
  lea    -0x20(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <eiki_strcpy@plt>
  lea    -0x40(%rbp),%rax
  mov    %rax,%rsi
  lea    D34(%rip),%rax
  mov    %rax,%rdi
  call   <eiki_execv_async@plt>
  mov    %eax,-0x48(%rbp)
  cmpl   $0xffffffff,-0x48(%rbp)
  je     L121
  mov    -0x48(%rbp),%eax
  mov    $0x0,%edx
  mov    $0x0,%esi
  mov    %eax,%edi
  call   <waitpid@plt>
  jmp    L30
L4:
  nop
  jmp    L30
L14:
  nop
  jmp    L30
L97:
  nop
  jmp    L30
L121:
  nop
L30:
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <eiki_free@plt>
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <eiki_free@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <eiki_free@plt>
  cmpl   $0xffffffff,-0x48(%rbp)
  je     L7
  mov    $0x0,%eax
  jmp    L1
L7:
  mov    $0xffffffff,%eax
L1:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L47
  call   <__stack_chk_fail@plt>
L47:
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_tag: D34
data_type: string
name: unpack_data
arguments: data_tag: D25
data_type: string
name: unpack_data
arguments: data_tag: D44
data_type: string

tool: D34: /usr/bin/gdb

tool: D25: /proc/

tool: D44: /exe

assistant: ```c
int eiki_attach_debugger() {
  pid_t debugger_pid = -1;
  pid_t pid;
  char pid_str[16];
  char *argv[] = {NULL, NULL, NULL, NULL};
  if (eiki_is_debugged() > 0) {
    return -2;
  }
  argv[0] = eiki_malloc(eiki_strlen("/usr/bin/gdb") + 1);
  if (!argv[0]) {
    goto end;
  }
  eiki_strcpy(argv[0], "/usr/bin/gdb");
  argv[1] = eiki_malloc(32);
  if (!argv[1]) {
    goto end;
  }
  eiki_strcpy(argv[1], "/proc/");
  pid = getpid();
  eiki_pid_to_str(pid, pid_str);
  eiki_strcat(argv[1], pid_str);
  eiki_strcat(argv[1], "/exe");
  argv[2] = eiki_malloc(16);
  if (!argv[2]) {
    goto end;
  }
  eiki_strcpy(argv[2], pid_str);
  debugger_pid = eiki_execv_async("/usr/bin/gdb", argv);
  if (debugger_pid != -1) {
    waitpid(debugger_pid, NULL, 0);
  }
end:
  eiki_free(argv[0]);
  eiki_free(argv[1]);
  eiki_free(argv[2]);
  return (debugger_pid != -1) ? 0 : -1;
}
```