user: 这段汇编代码用C语言表示是什么样的:

```asm
<opera_mem>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %edi,%r13d
  push   %r12
  mov    %r8d,%r12d
  push   %rbp
  mov    %rdx,%rbp
  push   %rbx
  mov    %rcx,%rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  test   %esi,%esi
  je     L26
  test   %rcx,%rcx
  je     L173
L53:
  movslq %r12d,%rax
  mov    %rax,%r14
  mov    %rax,(%rsp)
  shr    $0x2,%r14
  and    $0x3,%r12d
  lea    0x1(%r14),%rax
  mov    %r12d,0xc(%rsp)
  cmovne %rax,%r14
  test   %r14,%r14
  je     L52
  xor    %r15d,%r15d
  lea    0x10(%rsp),%r12
  jmp    L36
  nopl   (%rax)
L5:
  mov    0xc(%rsp),%edx
  mov    %rbx,%rdi
  mov    %r12,%rsi
  add    $0x1,%r15
  add    $0x4,%rbx
  call   <memcpy@plt>
  cmp    %r14,%r15
  je     L52
L36:
  lea    0x0(%rbp,%r15,4),%rsi
  mov    $0x4,%ecx
  mov    %r12,%rdx
  mov    %r13d,%edi
  call   <getdata@plt>
  cmp    (%rsp),%r15
  jg     L5
  mov    %rbx,%rdi
  mov    $0x4,%edx
  mov    %r12,%rsi
  add    $0x1,%r15
  call   <memcpy@plt>
  add    $0x4,%rbx
  cmp    %r14,%r15
  jne    L36
L52:
  mov    $0x1,%eax
L24:
  mov    0x28(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L138
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L26:
  mov    %r8d,%r15d
  mov    %r8d,%r14d
  and    $0xfffffffc,%r15d
  movslq %r15d,%r15
  lea    (%r15,%rdx,1),%rsi
  and    $0x3,%r14d
  je     L95
  lea    0x10(%rsp),%r12
  lea    0x4(%r15),%r8
  mov    $0x4,%ecx
  mov    %r12,%rdx
  mov    %r8,(%rsp)
  call   <getdata@plt>
  mov    (%rsp),%r8
  lea    (%rbx,%r15,1),%rsi
  xor    %eax,%eax
L150:
  mov    %eax,%edx
  add    $0x1,%eax
  movzbl (%rsi,%rdx,1),%ecx
  mov    %cl,(%r12,%rdx,1)
  cmp    %r14d,%eax
  jb     L150
L15:
  shr    $0x2,%r15
  xor    %r14d,%r14d
  sub    %rbp,%rbx
  shr    $0x2,%r8
  mov    %r8,(%rsp)
  jne    L71
  jmp    L52
  nopw   0x0(%rax,%rax,1)
L174:
  lea    (%rbx,%rbp,1),%rdx
  mov    $0x4,%ecx
  mov    %rbp,%rsi
  mov    %r13d,%edi
  call   <putdata@plt>
L125:
  add    $0x1,%r14
  add    $0x4,%rbp
  cmp    (%rsp),%r14
  je     L52
L71:
  cmp    %r14,%r15
  jne    L174
  mov    $0x4,%ecx
  mov    %r12,%rdx
  mov    %rbp,%rsi
  mov    %r13d,%edi
  call   <putdata@plt>
  jmp    L125
L173:
  mov    %r8d,%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  xor    %eax,%eax
  test   %rbx,%rbx
  je     L24
  jmp    L53
  nopl   0x0(%rax,%rax,1)
L95:
  lea    0x10(%rsp),%r12
  mov    $0x4,%ecx
  mov    %r12,%rdx
  call   <getdata@plt>
  mov    %r15,%r8
  jmp    L15
L138:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int opera_mem(pid_t target, int mode, long addr, unsigned char *bytes, int numbytes) {
  unsigned char buff[16];
  long cont, endpadd, startcopy;
  if (mode == 0) {
    startcopy = (numbytes / sizeof(int)) * sizeof(int);
    endpadd = (numbytes % sizeof(int) == 0 ? startcopy : startcopy + sizeof(int));
    getdata(target, addr + startcopy, buff, sizeof(int));
    for (cont = 0; cont < numbytes % sizeof(int); cont++) {
      buff[cont] = bytes[startcopy + cont];
    }
    for (cont = 0; cont < endpadd / sizeof(int); cont++) {
      if (cont == (startcopy / sizeof(int))) {
        putdata(target, (cont * sizeof(int)) + addr, buff, sizeof(int));
      } else {
        putdata(target, (cont * sizeof(int)) + addr, bytes + (cont * sizeof(int)), sizeof(int));
      }
    }
    return 1;
  } else {
    if (bytes == NULL) {
      bytes = (unsigned char *)malloc(sizeof(char) * numbytes);
      if (bytes == NULL)
        return 0;
    }
    for (cont = 0; cont < (numbytes % sizeof(int) == 0 ? numbytes / sizeof(int) : (numbytes / sizeof(int)) + 1); cont++) {
      getdata(target, addr + (cont * sizeof(int)), buff, sizeof(int));
      if (cont > numbytes)
        memcpy(bytes + (cont * sizeof(int)), buff, (numbytes % sizeof(int)));
      else
        memcpy(bytes + (cont * sizeof(int)), buff, sizeof(int));
    }
    return 1;
  }
}
```