user: 请从给定的汇编指令推导出C源代码：

```asm
<removeWalls>:
  endbr64
  push   %r15
  mov    $0x6,%r15d
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  mov    %edx,%ebp
  movslq %ecx,%rdx
  push   %rbx
  mov    %rdx,%r12
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  movslq %ebp,%rax
  lea    0x10(%rsp),%rbx
  lea    (%rax,%rax,2),%rax
  shl    $0x4,%rax
  add    %rsi,%rax
  movl   $0x1,(%rax,%rdx,4)
  movabs $0x100000000,%rax
  mov    %rax,0x10(%rsp)
  movabs $0x300000002,%rax
  mov    %rax,0x18(%rsp)
  xchg   %ax,%ax
L138:
  mov    $0x4,%esi
  mov    %rbx,%rdi
  call   <shuffle@plt>
  sub    $0x1,%r15d
  jne    L138
  cmp    $0x4,%ebp
  lea    -0x1(%rbp),%eax
  mov    %rbx,%r15
  setle  0x6(%rsp)
  test   %ebp,%ebp
  lea    0x20(%rsp),%rbx
  setg   0x4(%rsp)
  cmp    $0xa,%r12d
  mov    %eax,0x8(%rsp)
  setle  0x7(%rsp)
  test   %r12d,%r12d
  setg   0x5(%rsp)
L81:
  mov    (%r15),%eax
  test   %eax,%eax
  jne    L186
  cmpb   $0x0,0x4(%rsp)
  jne    L217
L186:
  cmp    $0x1,%eax
  jne    L218
  cmpb   $0x0,0x6(%rsp)
  jne    L86
L218:
  cmp    $0x2,%eax
  jne    L150
  cmpb   $0x0,0x5(%rsp)
  jne    L164
L150:
  cmp    $0x3,%eax
  jne    L2
  cmpb   $0x0,0x7(%rsp)
  jne    L79
L2:
  add    $0x4,%r15
  cmp    %r15,%rbx
  jne    L81
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L172
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L217:
  mov    0x8(%rsp),%esi
  mov    %r12d,%edx
  mov    %r13,%rdi
  call   <squareVisited@plt>
  test   %rax,%rax
  je     L219
L32:
  mov    (%r15),%eax
  jmp    L186
  nopl   (%rax)
L164:
  lea    -0x1(%r12),%ecx
  mov    %ebp,%esi
  mov    %r13,%rdi
  mov    %ecx,%edx
  mov    %ecx,0xc(%rsp)
  call   <squareVisited@plt>
  mov    0xc(%rsp),%ecx
  test   %rax,%rax
  je     L8
  mov    (%r15),%eax
  jmp    L150
  nopw   0x0(%rax,%rax,1)
L79:
  lea    0x1(%r12),%ecx
  mov    %ebp,%esi
  mov    %r13,%rdi
  mov    %ecx,%edx
  mov    %ecx,0xc(%rsp)
  call   <squareVisited@plt>
  test   %rax,%rax
  jne    L2
  mov    %r12d,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  call   <removeRightWall@plt>
  mov    0xc(%rsp),%ecx
  mov    %ebp,%edx
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <removeWalls>
  jmp    L2
  nopl   0x0(%rax)
L86:
  lea    0x1(%rbp),%r9d
  mov    %r12d,%edx
  mov    %r13,%rdi
  mov    %r9d,%esi
  mov    %r9d,0xc(%rsp)
  call   <squareVisited@plt>
  mov    0xc(%rsp),%r9d
  test   %rax,%rax
  je     L22
L45:
  mov    (%r15),%eax
  jmp    L218
  nopl   0x0(%rax)
L219:
  mov    %r12d,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  call   <removeTopWall@plt>
  mov    0x8(%rsp),%edx
  mov    %r12d,%ecx
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <removeWalls>
  jmp    L32
  nopl   0x0(%rax)
L8:
  mov    %r12d,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  mov    %ecx,0xc(%rsp)
  call   <removeLeftWall@plt>
  mov    0xc(%rsp),%ecx
  mov    %ebp,%edx
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <removeWalls>
  mov    (%r15),%eax
  jmp    L150
  nopw   0x0(%rax,%rax,1)
L22:
  mov    %r12d,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  mov    %r9d,0xc(%rsp)
  call   <removeBottomWall@plt>
  mov    0xc(%rsp),%edx
  mov    %r12d,%ecx
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <removeWalls>
  jmp    L45
L172:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void removeWalls(int (*maze)[25], int (*visited)[25 / 2], int startRow, int startCol) {
  visited[startRow][startCol] = 1;
  int i;
  int order[4] = {0, 1, 2, 3};
  for (i = 0; i < 6; i++)
    shuffle(order, 4);
  for (i = 0; i < 4; i++) {
    if (order[i] == 0) {
      if (startRow > 0 && (squareVisited(visited, startRow - 1, startCol) == 0)) {
        removeTopWall(maze, startRow, startCol);
        removeWalls(maze, visited, startRow - 1, startCol);
      }
    }
    if (order[i] == 1) {
      if ((startRow < (13 / 2) - 1) && (squareVisited(visited, startRow + 1, startCol) == 0)) {
        removeBottomWall(maze, startRow, startCol);
        removeWalls(maze, visited, startRow + 1, startCol);
      }
    }
    if (order[i] == 2) {
      if ((startCol > 0) && (squareVisited(visited, startRow, startCol - 1) == 0)) {
        removeLeftWall(maze, startRow, startCol);
        removeWalls(maze, visited, startRow, startCol - 1);
      }
    }
    if (order[i] == 3) {
      if ((startCol < (25 / 2) - 1) && (squareVisited(visited, startRow, startCol + 1) == 0)) {
        removeRightWall(maze, startRow, startCol);
        removeWalls(maze, visited, startRow, startCol + 1);
      }
    }
  }
}
```