user: 这段汇编代码用C语言表示是什么样的:

```asm
<cfg_ack_check>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xfd8,%rsp
  mov    %edi,%r12d
  mov    %fs:0x28,%rax
  mov    %rax,0xfc8(%rsp)
  xor    %eax,%eax
  movl   $0x3,0x10(%rsp)
  movq   $0x0,0x18(%rsp)
  mov    $0x1,%ebp
  lea    D22(%rip),%r13
  jmp    L24
L114:
  lea    D13(%rip),%rdi
  call   <perror@plt>
L144:
  mov    0xfc8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L36
  mov    %ebp,%eax
  add    $0xfd8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L30:
  add    $0x1,%rbx
  cmp    %rbx,%rbp
  je     L44
L91:
  cmpl   $0xb5,(%rax,%rbx,4)
  jne    L30
  cmpl   $0x62,0x4(%rax,%rbx,4)
  jne    L30
  mov    %r13,%rdi
  call   <printf@plt>
  cmp    %rbx,%rbp
  jne    L145
L44:
  mov    $0x3,%ebp
L24:
  lea    0xc(%rsp),%rbx
  mov    %rbx,%rdi
  call   <FD_ZERO@plt>
  mov    %rbx,%rsi
  mov    %r12d,%edi
  call   <FD_SET@plt>
  lea    0x1(%r12),%edi
  lea    0x10(%rsp),%r8
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    %rbx,%rsi
  call   <select@plt>
  cmp    $0xffffffff,%eax
  je     L114
  test   %eax,%eax
  je     L122
  lea    0x20(%rsp),%rsi
  mov    $0xfa0,%edx
  mov    %r12d,%edi
  call   <read@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L44
  mov    $0x0,%ebx
  lea    0x20(%rsp),%rax
  jmp    L91
L145:
  cmpl   $0x5,0x28(%rsp,%rbx,4)
  jne    L25
  cmpl   $0x0,0x2c(%rsp,%rbx,4)
  je     L112
L25:
  lea    D32(%rip),%rdi
  call   <printf@plt>
  mov    $0x1,%ebp
  jmp    L144
L112:
  lea    D40(%rip),%rdi
  call   <printf@plt>
  mov    $0x2,%ebp
  jmp    L144
L122:
  lea    D42(%rip),%rdi
  call   <printf@plt>
  mov    $0x3,%ebp
  jmp    L144
L36:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_tag: D22
datatype: string
name: disassemble_data
arguments: data_tag: D13
datatype: string
name: disassemble_data
arguments: data_tag: D32
datatype: string
name: disassemble_data
arguments: data_tag: D40
datatype: string
name: disassemble_data
arguments: data_tag: D42
datatype: string

tool: D22: Found header B5 62


tool: D13: select

tool: D32: Received ACK, succeeded.


tool: D40: Received NAK, failed.


tool: D42: No ACK/NAK received.


assistant: ```c
u_int8_t cfg_ack_check(int fd) {
  int rev;
  fd_set rfds;
  struct timeval tv;
  tv.tv_sec = 3;
  tv.tv_usec = 0;
  u_int16_t len = 0, i;
  u_int8_t rval = 1, buf[1000];
  while (1) {
    FD_ZERO(&rfds);
    FD_SET(fd, &rfds);
    rev = select(fd + 1, &rfds, NULL, NULL, &tv);
    if (rev == -1) {
      perror("select");
      break;
    } else if (rev) {
      len = read(fd, buf, sizeof(buf));
      for (i = 0; i < len; i++) {
        if (buf[i] == 0xB5 && buf[i + 1] == 0x62) {
          printf("Found header B5 62\n");
          break;
        }
      }
      if (i == len) {
        rval = 3;
      } else {
        if (buf[i + 2] == 0x05 && buf[i + 3] == 0x00) {
          printf("Received NAK, failed.\n");
          rval = 2;
          break;
        } else {
          printf("Received ACK, succeeded.\n");
          rval = 1;
          break;
        }
      }
    } else {
      printf("No ACK/NAK received.\n");
      rval = 3;
      break;
    }
  }
  return rval;
}
```