user: 这段汇编代码用C语言表示是什么样的：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x68,%rsp
  mov    %edi,-0x84(%rbp)
  mov    %rsi,-0x90(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  lea    0x10(%rbp),%rax
  mov    %rax,-0x48(%rbp)
  mov    %rsp,%rax
  mov    %rax,%rbx
  movl   $0xa,-0x74(%rbp)
  mov    -0x74(%rbp),%eax
  mov    %eax,-0x50(%rbp)
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,%rdx
  mov    $0x0,%ecx
  mov    -0x50(%rbp),%eax
  cltq
  sub    $0x1,%rax
  mov    %rax,-0x70(%rbp)
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,%r14
  mov    $0x0,%r15d
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,%r12
  mov    $0x0,%r13d
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,-0x60(%rbp)
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,%r10
  mov    $0x0,%r11d
  mov    -0x50(%rbp),%eax
  cltq
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L29:
  cmp    %rdx,%rsp
  je     L64
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L29
L64:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L63
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L63:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x68(%rbp)
  mov    -0x50(%rbp),%eax
  cltq
  mov    %rax,%r8
  mov    $0x0,%r9d
  mov    -0x50(%rbp),%eax
  cltq
  mov    $0x10,%edx
  sub    $0x1,%rdx
  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
L35:
  cmp    %rdx,%rsp
  je     L3
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L35
L3:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L19
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L19:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x58(%rbp)
  mov    -0x58(%rbp),%rax
  movb   $0x1,(%rax)
  mov    -0x58(%rbp),%rax
  movb   $0x2,0x9(%rax)
  mov    -0x68(%rbp),%rax
  lea    -0x60(%rbp),%rdx
  mov    %rdx,%r10
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <retframe_block.0>
  mov    -0x68(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x1,%al
  jne    L42
  mov    -0x68(%rbp),%rax
  movzbl 0x9(%rax),%eax
  cmp    $0x2,%al
  je     L9
L42:
  call   <abort@plt>
L9:
  mov    $0x0,%eax
  mov    %rbx,%rsp
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L52
  call   <__stack_chk_fail@plt>
L52:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
int main(int argc, char **argv) {
  int size = 10;
  typedef struct {
    char val[size];
  } block;
  block a, b;
  block __attribute__((noinline)) retframe_block() { return *(block *)&b; }
  b.val[0] = 1;
  b.val[9] = 2;
  a = retframe_block();
  if (a.val[0] != 1 || a.val[9] != 2)
    abort();
  return 0;
}
```