user: 下面的汇编指令对应的C源代码是什么：

```asm
<tlsext_cb>:
  endbr64
  mov    %edx,%eax
  add    $0xffffff80,%edx
  push   %r13
  mov    %rcx,%r13
  push   %r12
  mov    %r8d,%r12d
  push   %rbp
  mov    %r9,%rbp
  cmp    $0x8,%edx
  ja     L42
  lea    D125(%rip),%rcx
  movslq (%rcx,%rdx,4),%rdx
  add    %rcx,%rdx
  notrack jmp *%rdx
  nopl   0x0(%rax)
  lea    D54(%rip),%rcx
L63:
  test   %esi,%esi
  lea    D3(%rip),%rdx
  mov    %r12d,%r9d
  mov    %rbp,%rdi
  lea    D33(%rip),%rsi
  mov    %eax,%r8d
  cmove  %rsi,%rdx
  lea    D117(%rip),%rsi
  call   <BIO_printf@plt>
  mov    %rbp,%rdi
  mov    %r12d,%edx
  mov    %r13,%rsi
  call   <BIO_dump@plt>
  mov    %rbp,%rdi
  pop    %rbp
  pop    %r12
  pop    %r13
  jmp    1090 <BIO_flush@plt>
  nopl   0x0(%rax,%rax,1)
  lea    D32(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D70(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D40(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D88(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D126(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D127(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D82(%rip),%rcx
  jmp    L63
  nopl   0x0(%rax)
  lea    D119(%rip),%rcx
  jmp    L63
L42:
  lea    D5(%rip),%rcx
  jmp    L63
```

tool_calls: name: extract_symbolic_data
arguments: tag: D54
type: string
name: extract_symbolic_data
arguments: tag: D3
type: string
name: extract_symbolic_data
arguments: tag: D33
type: string
name: extract_symbolic_data
arguments: tag: D117
type: string
name: extract_symbolic_data
arguments: tag: D32
type: string
name: extract_symbolic_data
arguments: tag: D70
type: string
name: extract_symbolic_data
arguments: tag: D40
type: string
name: extract_symbolic_data
arguments: tag: D88
type: string
name: extract_symbolic_data
arguments: tag: D126
type: string
name: extract_symbolic_data
arguments: tag: D127
type: string
name: extract_symbolic_data
arguments: tag: D82
type: string
name: extract_symbolic_data
arguments: tag: D119
type: string
name: extract_symbolic_data
arguments: tag: D5
type: string

tool: D54: max fragment length

tool: D3: server

tool: D33: client

tool: D117: TLS %s extension "%s" (id=%d), len=%d


tool: D32: server name

tool: D70: server ticket

tool: D40: truncated HMAC

tool: D88: status request

tool: D126: elliptic curves

tool: D127: EC point formats

tool: D82: client certificate URL

tool: D119: trusted CA keys

tool: D5: unknown

assistant: ```c
void tlsext_cb(SSL *s, int client_server, int type, unsigned char *data, int len, void *arg) {
  BIO *bio = arg;
  char *extname;
  switch (type) {
  case TLSEXT_TYPE_server_name:
    extname = "server name";
    break;
  case TLSEXT_TYPE_max_fragment_length:
    extname = "max fragment length";
    break;
  case TLSEXT_TYPE_client_certificate_url:
    extname = "client certificate URL";
    break;
  case TLSEXT_TYPE_trusted_ca_keys:
    extname = "trusted CA keys";
    break;
  case TLSEXT_TYPE_truncated_hmac:
    extname = "truncated HMAC";
    break;
  case TLSEXT_TYPE_status_request:
    extname = "status request";
    break;
  case TLSEXT_TYPE_elliptic_curves:
    extname = "elliptic curves";
    break;
  case TLSEXT_TYPE_ec_point_formats:
    extname = "EC point formats";
    break;
  case TLSEXT_TYPE_session_ticket:
    extname = "server ticket";
    break;
  default:
    extname = "unknown";
    break;
  }
  BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n", client_server ? "server" : "client", extname, type, len);
  BIO_dump(bio, (char *)data, len);
  (void)BIO_flush(bio);
}
```