user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r12
  lea    D26(%rip),%rdi
  push   %rbx
  sub    $0x38,%rsp
  movdqa D17(%rip),%xmm0
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%rax
  movl   $0x1f4,0x20(%rsp)
  mov    %rsp,%r12
  mov    %rax,(%rsp)
  lea    0x18(%rsp),%rax
  movaps %xmm0,0x10(%rsp)
  mov    %rax,0x8(%rsp)
  call   <puts@plt>
  mov    (%rsp),%rsi
  mov    %r12,%rcx
  xor    %eax,%eax
  lea    D142(%rip),%rdi
  mov    (%rsi),%edx
  call   <printf@plt>
  lea    D103(%rip),%rdi
  mov    (%rsp),%rbx
  call   <puts@plt>
  mov    (%rsp),%rsi
  lea    D9(%rip),%rdi
  xor    %eax,%eax
  mov    0x10(%rsi),%edx
  add    $0x10,%rsi
  call   <printf@plt>
  lea    D149(%rip),%rdi
  addq   $0x4,(%rsp)
  call   <puts@plt>
  mov    (%rsp),%rsi
  mov    %r12,%rcx
  xor    %eax,%eax
  lea    D106(%rip),%rdi
  mov    (%rsi),%edx
  call   <printf@plt>
  lea    D7(%rip),%rdi
  subq   $0x4,0x8(%rsp)
  call   <puts@plt>
  mov    0x8(%rsp),%rsi
  lea    0x8(%rsp),%rcx
  xor    %eax,%eax
  lea    D13(%rip),%rdi
  mov    (%rsi),%edx
  call   <printf@plt>
  lea    D43(%rip),%rdi
  subq   $0x4,(%rsp)
  addq   $0x4,0x8(%rsp)
  call   <puts@plt>
  mov    0x8(%rsp),%rdx
  mov    (%rsp),%rsi
  xor    %eax,%eax
  lea    D139(%rip),%rdi
  call   <printf@plt>
  lea    D117(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rsi
  mov    (%rsp),%rdx
  xor    %eax,%eax
  lea    D44(%rip),%rdi
  mov    %rsi,%rcx
  sub    %rdx,%rcx
  sar    $0x2,%rcx
  call   <printf@plt>
  lea    D35(%rip),%rdi
  call   <puts@plt>
  xor    %eax,%eax
  lea    0x8(%rbx),%rdx
  lea    0x10(%rbx),%rsi
  lea    D71(%rip),%rdi
  call   <printf@plt>
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  add    $0x38,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %r12
  ret
L5:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_label: D26
datatype: string
name: unpack_data
arguments: data_label: D17
datatype: byte[16]
name: unpack_data
arguments: data_label: D142
datatype: string
name: unpack_data
arguments: data_label: D103
datatype: string
name: unpack_data
arguments: data_label: D9
datatype: string
name: unpack_data
arguments: data_label: D149
datatype: string
name: unpack_data
arguments: data_label: D106
datatype: string
name: unpack_data
arguments: data_label: D7
datatype: string
name: unpack_data
arguments: data_label: D13
datatype: string
name: unpack_data
arguments: data_label: D43
datatype: string
name: unpack_data
arguments: data_label: D139
datatype: string
name: unpack_data
arguments: data_label: D117
datatype: string
name: unpack_data
arguments: data_label: D44
datatype: string
name: unpack_data
arguments: data_label: D35
datatype: string
name: unpack_data
arguments: data_label: D71
datatype: string

tool: D26: pointer value, dereferenced pointer, pointer address:

tool: {"D17": [0x64,0x00,0x00,0x00,0xc8,0x00,0x00,0x00,0x2c,0x01,0x00,0x00,0x90,0x01,0x00,0x00]}

tool: D142: ptr1 = %p, *ptr1 = %d, &ptr1 = %p


tool: D103: 
adding an int to a pointer:

tool: D9: ptr1 + 4 = %p, *(ptr1 + 4) = %d


tool: D149: 
values after ptr1++:

tool: D106: ptr1 + 4 = %p, *ptr1 = %d, &ptr1 = %p


tool: D7: 
values after ptr2--:

tool: D13: ptr2 = %p, *ptr2 = %d, &ptr2 = %p


tool: D43: 
Pointers reset to original values:

tool: D139: ptr1 = %p, ptr2 = %p


tool: D117: 
subtracting one pointer from another:

tool: D44: ptr2 = %p, ptr1 = %p, ptr2 - ptr1 = %ld


tool: D35: 
subtracting an int from a pointer:

tool: D71: ptr3 = %p, ptr3 - 2 = %p


assistant: ```c
int main() {
  int urn[5] = {100, 200, 300, 400, 500};
  int *ptr1, *ptr2, *ptr3;
  ptr1 = urn;
  ptr2 = &urn[2];
  printf("pointer value, dereferenced pointer, pointer address:\n");
  printf("ptr1 = %p, *ptr1 = %d, &ptr1 = %p\n", ptr1, *ptr1, &ptr1);
  ptr3 = ptr1 + 4;
  printf("\nadding an int to a pointer:\n");
  printf("ptr1 + 4 = %p, *(ptr1 + 4) = %d\n", ptr1 + 4, *(ptr1 + 4));
  ptr1++;
  printf("\nvalues after ptr1++:\n");
  printf("ptr1 + 4 = %p, *ptr1 = %d, &ptr1 = %p\n", ptr1, *ptr1, &ptr1);
  ptr2--;
  printf("\nvalues after ptr2--:\n");
  printf("ptr2 = %p, *ptr2 = %d, &ptr2 = %p\n", ptr2, *ptr2, &ptr2);
  --ptr1;
  ++ptr2;
  printf("\nPointers reset to original values:\n");
  printf("ptr1 = %p, ptr2 = %p\n", ptr1, ptr2);
  printf("\nsubtracting one pointer from another:\n");
  printf("ptr2 = %p, ptr1 = %p, ptr2 - ptr1 = %ld\n", ptr2, ptr1, ptr2 - ptr1);
  printf("\nsubtracting an int from a pointer:\n");
  printf("ptr3 = %p, ptr3 - 2 = %p\n", ptr3, ptr3 - 2);
  return 0;
}
```