user: 请从给定的汇编指令推导出C源代码：

```asm
<execute_regex>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %rdx,-0x68(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    -0x60(%rbp),%rax
  mov    %rax,-0x30(%rbp)
  movl   $0x5,-0x40(%rbp)
  mov    -0x40(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x28(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r8
  mov    $0x0,%r9d
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L50:
  cmp    %rdx,%rsp
  je     L83
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L50
L83:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L94
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L94:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x20(%rbp)
L112:
  mov    -0x20(%rbp),%rcx
  mov    -0x40(%rbp),%edx
  mov    -0x30(%rbp),%rsi
  mov    -0x58(%rbp),%rax
  mov    $0x0,%r8d
  mov    %rax,%rdi
  call   <regexec@plt>
  mov    %eax,-0x3c(%rbp)
  cmpl   $0x1,-0x3c(%rbp)
  je     L37
  mov    -0x3c(%rbp),%eax
  mov    %eax,%esi
  lea    D6(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  movl   $0x0,-0x4c(%rbp)
  jmp    L3
L81:
  mov    -0x20(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,8),%eax
  cmp    $0xffffffff,%eax
  je     L17
  mov    -0x20(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,8),%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%rax
  sub    -0x60(%rbp),%rax
  add    %edx,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x20(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  movslq %edx,%rdx
  mov    0x4(%rax,%rdx,8),%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%rax
  sub    -0x60(%rbp),%rax
  add    %edx,%eax
  mov    %eax,-0x34(%rbp)
  movl   $0x0,-0x48(%rbp)
  mov    -0x20(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,8),%eax
  mov    %eax,-0x44(%rbp)
  jmp    L78
L25:
  mov    -0x44(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x60(%rbp),%rax
  add    %rdx,%rax
  mov    -0x48(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x68(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x48(%rbp)
  addl   $0x1,-0x44(%rbp)
L78:
  mov    -0x20(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  movslq %edx,%rdx
  mov    0x4(%rax,%rdx,8),%eax
  cmp    %eax,-0x44(%rbp)
  jl     L25
  mov    -0x48(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addl   $0x1,-0x4c(%rbp)
L3:
  mov    -0x4c(%rbp),%eax
  cmp    -0x40(%rbp),%eax
  jl     L81
  jmp    L80
L17:
  nop
L80:
  mov    -0x20(%rbp),%rax
  mov    0x4(%rax),%eax
  cltq
  add    %rax,-0x30(%rbp)
  jmp    L112
L37:
  nop
  nop
  mov    %rbx,%rsp
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L2
  call   <__stack_chk_fail@plt>
L2:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D6
data_type: string

tool: D6: -%d-

assistant: ```c
void execute_regex(regex_t *reg, char *source, char *dest) {
  char *mpos = source;
  int match_count = 5;
  int i, k, j;
  regmatch_t result[match_count];
  while (1) {
    char *extract;
    int unmatched = regexec(reg, mpos, match_count, result, 0);
    if (unmatched == 1)
      break;
    printf("-%d-", unmatched);
    for (i = 0; i < match_count; i++) {
      int start;
      int finish;
      if (result[i].rm_so == -1)
        break;
      start = result[i].rm_so + (mpos - source);
      finish = result[i].rm_eo + (mpos - source);
      k = 0;
      for (j = result[i].rm_so; j < result[i].rm_eo; ++j) {
        dest[k] = source[j];
        k++;
      }
      dest[k] = '\0';
    }
    mpos += result[0].rm_eo;
  }
  return;
}
```