user: 下面的汇编指令对应的C源代码是什么:

```asm
<totalNQueens>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,%ebp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x4(%rsp)
  movslq %edi,%rdi
  call   <malloc@plt>
  mov    %rax,%r14
  lea    -0x1(%rbp,%rbp,1),%ebx
  movslq %ebx,%r13
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,%r12
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,%r13
  test   %ebp,%ebp
  jle    L44
  mov    %r14,%rax
  mov    %ebp,%edx
  add    %r14,%rdx
L82:
  movb   $0x0,(%rax)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L82
  test   %ebx,%ebx
  jle    L63
L16:
  mov    $0x0,%eax
L87:
  movb   $0x0,0x0(%r13,%rax,1)
  movb   $0x0,(%r12,%rax,1)
  add    $0x1,%rax
  cmp    %eax,%ebx
  jg     L87
  mov    %ebp,%edi
  mov    $0x0,%eax
  call   <init_board@plt>
  movslq %eax,%r15
  mov    %ebp,%esi
  mov    %r15,%rdi
  mov    $0x0,%eax
  call   <clear_board@plt>
  lea    0x4(%rsp),%rdi
  sub    $0x8,%rsp
  push   $0x0
  mov    %r13,%r9
  mov    %r12,%r8
  mov    %r14,%rcx
  mov    %ebp,%edx
  mov    %r15,%rsi
  mov    $0x0,%eax
  call   <aux@plt>
  add    $0x10,%rsp
  test   %ebp,%ebp
  jle    L8
L60:
  mov    $0x0,%ebx
L74:
  mov    (%r15,%rbx,8),%rdi
  call   <free@plt>
  add    $0x1,%rbx
  cmp    %ebx,%ebp
  jg     L74
L8:
  mov    %r15,%rdi
  call   <free@plt>
  mov    %r14,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    %r13,%rdi
  call   <free@plt>
  mov    0x4(%rsp),%eax
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L36
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L63:
  mov    %ebp,%edi
  mov    $0x0,%eax
  call   <init_board@plt>
  movslq %eax,%r15
  mov    %ebp,%esi
  mov    %r15,%rdi
  mov    $0x0,%eax
  call   <clear_board@plt>
  lea    0x4(%rsp),%rdi
  sub    $0x8,%rsp
  push   $0x0
  mov    %r13,%r9
  mov    %r12,%r8
  mov    %r14,%rcx
  mov    %ebp,%edx
  mov    %r15,%rsi
  mov    $0x0,%eax
  call   <aux@plt>
  add    $0x10,%rsp
  jmp    L60
L44:
  test   %ebx,%ebx
  jg     L16
  mov    %ebp,%edi
  mov    $0x0,%eax
  call   <init_board@plt>
  movslq %eax,%r15
  mov    %ebp,%esi
  mov    %r15,%rdi
  mov    $0x0,%eax
  call   <clear_board@plt>
  lea    0x4(%rsp),%rdi
  sub    $0x8,%rsp
  push   $0x0
  mov    %r13,%r9
  mov    %r12,%r8
  mov    %r14,%rcx
  mov    %ebp,%edx
  mov    %r15,%rsi
  mov    $0x0,%eax
  call   <aux@plt>
  add    $0x10,%rsp
  jmp    L8
L36:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int totalNQueens(int n) {
  int num;
  char *col_mask;
  char *diag_mask;
  char *anti_diag_mask;
  char **board;
  num = 0;
  col_mask = malloc(sizeof(char) * n);
  diag_mask = malloc(sizeof(char) * (2 * n - 1));
  anti_diag_mask = malloc(sizeof(char) * (2 * n - 1));
  int i;
  for (i = 0; i < n; ++i) {
    col_mask[i] = 0;
  }
  for (i = 0; i < 2 * n - 1; ++i) {
    diag_mask[i] = anti_diag_mask[i] = 0;
  }
  board = init_board(n);
  clear_board(board, n);
  aux(&num, board, n, col_mask, diag_mask, anti_diag_mask, 0);
  for (i = 0; i < n; ++i) {
    free(board[i]);
  }
  free(board);
  free(col_mask);
  free(diag_mask);
  free(anti_diag_mask);
  return num;
}
```