user: 下面的汇编指令对应的C源代码是什么:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  movl   $0x0,-0x3c(%rbp)
  movq   $0x20000000,-0x20(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L97
L101:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0xabadf00d,%eax
  jne    L74
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0xdeadbeef,%eax
  jne    L74
  movl   $0x1,-0x3c(%rbp)
  mov    -0x38(%rbp),%eax
  cltq
  add    %rax,-0x20(%rbp)
L74:
  addl   $0x1,-0x38(%rbp)
L97:
  cmpl   $0x2f,-0x38(%rbp)
  jle    L101
  cmpl   $0x0,-0x3c(%rbp)
  jne    L102
  movq   $0x20046500,-0x20(%rbp)
  movl   $0x0,-0x34(%rbp)
  jmp    L80
L33:
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0xabadf00d,%eax
  jne    L126
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0xdeadbeef,%eax
  jne    L126
  movl   $0x1,-0x3c(%rbp)
  mov    -0x34(%rbp),%eax
  cltq
  add    %rax,-0x20(%rbp)
L126:
  addl   $0x1,-0x34(%rbp)
L80:
  cmpl   $0x2f,-0x34(%rbp)
  jle    L33
L102:
  mov    $0x80fffc0,%eax
  movl   $0x20000010,(%rax)
  mov    $0x80fffc4,%eax
  movl   $0x20046520,(%rax)
  mov    $0x80fffd8,%eax
  movl   $0x0,(%rax)
  movq   $0x20400000,-0x18(%rbp)
  movl   $0x67893421,-0x30(%rbp)
  movl   $0x12756342,-0x24(%rbp)
  movl   $0x0,-0x2c(%rbp)
  jmp    L110
L60:
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x2c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x18(%rbp),%rdx
  add    %rcx,%rdx
  xor    -0x30(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x24(%rbp),%eax
  add    %eax,-0x30(%rbp)
  addl   $0x1,-0x2c(%rbp)
L110:
  cmpl   $0x18fff,-0x2c(%rbp)
  jle    L60
  movq   $0x20400000,-0x10(%rbp)
  movq   $0x8000000,-0x8(%rbp)
  movl   $0x0,-0x28(%rbp)
  jmp    L41
L83:
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    -0x28(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x8(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x28(%rbp)
L41:
  cmpl   $0x4ffff,-0x28(%rbp)
  jle    L83
  mov    $0x10000020,%eax
  movl   $0x0,(%rax)
  mov    $0x10000020,%eax
  movl   $0x340,(%rax)
  mov    $0x0,%eax
  call   <rxTools@plt>
  nop
  leave
  ret
```

assistant: ```c
void main() {
  int fbfound = 0;
  unsigned char *screen = 0x20000000;
  for (int i = 0; i < 0x30; i++) {
    if (*((unsigned int *)(screen + i + 0)) == 0xABADF00D && *((unsigned int *)(screen + i + 4)) == 0xDEADBEEF) {
      fbfound = 1;
      screen += i;
    }
  }
  if (!fbfound) {
    screen = 0x20046500;
    for (int i = 0; i < 0x30; i++) {
      if (*((unsigned int *)(screen + i + 0)) == 0xABADF00D && *((unsigned int *)(screen + i + 4)) == 0xDEADBEEF) {
        fbfound = 1;
        screen += i;
      }
    }
  }
  *((unsigned int *)0x080FFFC0) = 0x20000010;
  *((unsigned int *)0x080FFFC4) = 0x20046520;
  *((unsigned int *)0x080FFFD8) = 0;
  unsigned int *buf = 0x20400000;
  unsigned int base = 0x67893421;
  unsigned int seed = 0x12756342;
  for (int i = 0; i < 400 * 1024 / 4; i++) {
    buf[i] ^= base;
    base += seed;
  }
  unsigned char *src = 0x20400000;
  unsigned char *dst = 0x08000000;
  for (int i = 0; i < 320 * 1024; i++) {
    dst[i] = src[i];
  }
  *(unsigned int *)0x10000020 = 0;
  *(unsigned int *)0x10000020 = 0x340;
  rxTools();
}
```