user: 下面的汇编指令对应的C源代码是什么：

```asm
<shift_and_mark>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  lea    -0x1(%rdx,%r8,1),%r14
  push   %r13
  mov    %rcx,%r13
  push   %r12
  and    $0x1f,%r13d
  mov    %rdx,%r12
  push   %rbp
  mov    %rcx,%rbp
  push   %rbx
  shr    $0x5,%rbp
  mov    %r8,%rbx
  sub    $0x28,%rsp
  mov    %rsi,0x8(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  sub    %rbp,%r14
  js     L32
L73:
  sub    $0x1,%r12
  mov    %rbp,%rax
  cmp    %r14,%r12
  cmova  %r14,%r12
  sub    %rbx,%rax
  sub    %rbp,%rbx
  xor    %ebp,%ebp
  test   %rbx,%rbx
  mov    %rax,(%rsp)
  cmovns %rbx,%rbp
  jle    L42
  lea    -0x1(%rbp),%rbx
  lea    0x10(%rsp),%r14
  mov    %r13,%rsi
  mov    (%r15,%rbx,4),%edi
  mov    %r14,%rdx
  call   <ext_shift@plt>
  mov    (%rsp),%rax
  mov    0x8(%rsp),%rcx
  mov    0x14(%rsp),%edx
  lea    0x1(%rax,%rbx,1),%rax
  or     %edx,(%rcx,%rax,4)
L42:
  cmp    %rbp,%r12
  jbe    L0
  mov    (%rsp),%rax
  mov    0x8(%rsp),%rcx
  lea    0x10(%rsp),%r14
  add    %rbp,%rax
  lea    (%rcx,%rax,4),%rbx
  cs nopw 0x0(%rax,%rax,1)
L4:
  mov    (%r15,%rbp,4),%edi
  mov    %r14,%rdx
  mov    %r13,%rsi
  add    $0x1,%rbp
  call   <ext_shift@plt>
  mov    0x10(%rsp),%eax
  or     %eax,(%rbx)
  mov    0x14(%rsp),%eax
  or     %eax,0x4(%rbx)
  add    $0x4,%rbx
  cmp    %rbp,%r12
  ja     L4
  mov    %r12,%rbp
L0:
  add    (%rsp),%rbp
  jne    L69
L48:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L2
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L69:
  mov    (%r15,%r12,4),%edi
  lea    0x10(%rsp),%rdx
  mov    %r13,%rsi
  call   <ext_shift@plt>
  mov    0x8(%rsp),%rcx
  add    (%rsp),%r12
  mov    0x10(%rsp),%eax
  or     %eax,(%rcx,%r12,4)
  jmp    L48
  nopl   0x0(%rax)
L32:
  lea    D2(%rip),%rdi
  call   <printf@plt>
  jmp    L73
L2:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_label: D2
type: string

tool: D2: Failure!!!!!


assistant: ```c
void shift_and_mark(uint64_t *source, uint64_t *target, unsigned long long length, unsigned long long shift, unsigned long long segoffset) {
  uint8_t bitoff = shift % (sizeof(uint64_t) * 8);
  unsigned long long offset = shift / (sizeof(uint64_t) * 8);
  uint64_t shifted[2];
  unsigned long long i;
  long long off_the_end;
  off_the_end = length + segoffset - offset - 1;
  if (off_the_end < 0)
    printf("Failure!!!!!\n");
  long long stop = (((length - 1) < (off_the_end)) ? (length - 1) : (off_the_end));
  const unsigned long long access_offset = offset - segoffset;
  const long long start_offset = (((0) > ((long long)segoffset - (long long)offset)) ? (0) : ((long long)segoffset - (long long)offset));
  if (start_offset > 0) {
    i = start_offset - 1;
    ext_shift(source[i], bitoff, shifted);
    target[i + 1 + access_offset] |= shifted[1];
  }
  for (i = start_offset; i < stop; i++) {
    ext_shift(source[i], bitoff, shifted);
    target[i + access_offset] |= shifted[0];
    target[i + 1 + access_offset] |= shifted[1];
  }
  if (i + access_offset > 0) {
    i = stop;
    ext_shift(source[i], bitoff, shifted);
    target[i + access_offset] |= shifted[0];
  }
  return;
}
```