user: 这段汇编代码用C语言表示是什么样的：

```asm
<main>:
  endbr64
  push   %r15
  xor    %edx,%edx
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  mov    D79(%rip),%rax
  lea    0xc(%rsp),%rbp
  lea    0x10(%rsp),%r12
  mov    %ebp,%esi
  mov    (%rax),%edi
  xor    %eax,%eax
  call   <syscall@plt>
  xor    %esi,%esi
  mov    %rbp,%rdi
  call   <settimeofday@plt>
  mov    D61(%rip),%rbx
  mov    D21(%rip),%rbp
  xor    %eax,%eax
  mov    %r12,%rdx
  mov    0x0(%rbp),%edi
  mov    (%rbx),%esi
  call   <syscall@plt>
  mov    D67(%rip),%r14
  mov    (%rbx),%esi
  xor    %eax,%eax
  mov    %r12,%rdx
  mov    (%r14),%edi
  call   <syscall@plt>
  mov    D18(%rip),%r13
  mov    (%rbx),%esi
  xor    %eax,%eax
  mov    %r12,%rdx
  mov    0x0(%r13),%edi
  call   <syscall@plt>
  mov    0x0(%rbp),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  mov    D31(%rip),%r15
  mov    (%r15),%esi
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    0x0(%rbp),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  mov    D42(%rip),%r15
  mov    (%r15),%esi
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    0x0(%rbp),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  mov    D91(%rip),%r15
  mov    (%r15),%esi
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    0x0(%rbp),%edi
  mov    (%rbx),%esi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    (%rbx),%esi
  mov    %r12,%rcx
  addq   $0x1,0x18(%rsp)
  mov    D97(%rip),%rbp
  mov    D36(%rip),%rax
  mov    0x0(%rbp),%edi
  mov    (%rax),%edx
  xor    %eax,%eax
  call   <syscall@plt>
  mov    (%rbx),%esi
  mov    0x0(%rbp),%edi
  xor    %edx,%edx
  xor    %eax,%eax
  mov    %r12,%rcx
  movq   $0x0,0x18(%rsp)
  movl   $0x2710,0x10(%rsp)
  call   <syscall@plt>
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L9
  add    $0x38,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L9:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  int t;
  struct timeval tv;
  struct timespec ts;
  time_t tt;
  t = syscall(SYS_gettimeofday, &tv, NULL);
  settimeofday(&tv, NULL);
  syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_settime, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_getres, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_settime, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_getres, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_gettime, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_settime, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_getres, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_gettime, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_settime, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_getres, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts);
  ts.tv_sec++;
  syscall(SYS_clock_nanosleep, CLOCK_REALTIME, TIMER_ABSTIME, &ts);
  ts.tv_sec = 0;
  ts.tv_nsec = 10000;
  syscall(SYS_clock_nanosleep, CLOCK_REALTIME, 0x0, &ts);
  return 0;
}
```