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
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x1,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x0,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x2,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x3,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x4,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x5,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x7,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x8,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x9,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0xf,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1f,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x1f,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x20,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x1f,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x21,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x3f,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0xfff,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0xfff,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1000,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0xfff,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1001,%edi
  call   <memalign@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  and    $0x1fff,%eax
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0xffffffff,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jne    L127
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  jne    L127
  mov    $0x1,%eax
  jmp    L98
L127:
  mov    $0x0,%eax
L98:
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x2,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x3,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x8,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jne    L32
  mov    -0x10(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  jne    L32
  mov    $0x1,%eax
  jmp    L74
L32:
  mov    $0x0,%eax
L74:
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x1f,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x20,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jne    L55
  mov    -0x10(%rbp),%rax
  and    $0x1f,%eax
  test   %rax,%rax
  jne    L55
  mov    $0x1,%eax
  jmp    L114
L55:
  mov    $0x0,%eax
L114:
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x21,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0xfff,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x1000,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jne    L36
  mov    -0x10(%rbp),%rax
  and    $0xfff,%eax
  test   %rax,%rax
  jne    L36
  mov    $0x1,%eax
  jmp    L91
L36:
  mov    $0x0,%eax
L91:
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x10(%rbp),%rax
  mov    $0x64,%edx
  mov    $0x1001,%esi
  mov    %rax,%rdi
  call   <posix_memalign@plt>
  mov    %eax,-0x14(%rbp)
  mov    D61(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x14(%rbp)
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L37
  call   <__stack_chk_fail@plt>
L37:
  leave
  ret
```

assistant: ```c
int main(void) {
  int *p;
  int res;
  assert(sizeof(long int) == sizeof(void *));
  p = memalign(0, 100);
  assert(0 == (long)p % 8);
  p = memalign(1, 100);
  assert(0 == (long)p % 8);
  p = memalign(2, 100);
  assert(0 == (long)p % 8);
  p = memalign(3, 100);
  assert(0 == (long)p % 8);
  p = memalign(4, 100);
  assert(0 == (long)p % 8);
  p = memalign(5, 100);
  assert(0 == (long)p % 8);
  p = memalign(7, 100);
  assert(0 == (long)p % 8);
  p = memalign(8, 100);
  assert(0 == (long)p % 8);
  p = memalign(9, 100);
  assert(0 == (long)p % 16);
  p = memalign(31, 100);
  assert(0 == (long)p % 32);
  p = memalign(32, 100);
  assert(0 == (long)p % 32);
  p = memalign(33, 100);
  assert(0 == (long)p % 64);
  p = memalign(4095, 100);
  assert(0 == (long)p % 4096);
  p = memalign(4096, 100);
  assert(0 == (long)p % 4096);
  p = memalign(4097, 100);
  assert(0 == (long)p % 8192);
  res = posix_memalign((void **)&p, -1, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 0, 100);
  assert(0 == res && 0 == (long)p % 8);
  res = posix_memalign((void **)&p, 1, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 2, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 3, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, sizeof(void *), 100);
  assert(0 == res && 0 == (long)p % sizeof(void *));
  res = posix_memalign((void **)&p, 31, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 32, 100);
  assert(0 == res && 0 == (long)p % 32);
  res = posix_memalign((void **)&p, 33, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 4095, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 4096, 100);
  assert(0 == res && 0 == (long)p % 4096);
  res = posix_memalign((void **)&p, 4097, 100);
  assert(EINVAL == res);
  return 0;
}
```