user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x1020304,-0x3c(%rbp)
  lea    -0x3c(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  lea    -0x3c(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x20(%rbp)
  lea    -0x3c(%rbp),%rax
  add    $0x2,%rax
  mov    %rax,-0x18(%rbp)
  lea    -0x3c(%rbp),%rax
  add    $0x3,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x3c(%rbp),%eax
  shr    $0x18,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x3c(%rbp),%eax
  sar    $0x10,%eax
  and    $0xff,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x3c(%rbp),%eax
  sar    $0x8,%eax
  and    $0xff,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x3c(%rbp),%eax
  and    $0xff,%eax
  mov    %eax,-0x2c(%rbp)
  lea    D43(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    -0x3c(%rbp),%edx
  lea    -0x3c(%rbp),%rax
  mov    %rax,%rsi
  lea    D39(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%edi
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%esi
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%r8d
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%edx
  mov    -0x18(%rbp),%r9
  mov    -0x20(%rbp),%rcx
  mov    -0x28(%rbp),%rax
  sub    $0x8,%rsp
  push   %rdi
  push   -0x10(%rbp)
  push   %rsi
  mov    %rax,%rsi
  lea    D25(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  add    $0x20,%rsp
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x38(%rbp)
  jne    L38
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x34(%rbp)
  jne    L38
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x30(%rbp)
  jne    L38
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x2c(%rbp)
  jne    L38
  lea    D35(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  jmp    L9
L38:
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x2c(%rbp)
  jne    L11
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x30(%rbp)
  jne    L11
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x34(%rbp)
  jne    L11
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    %eax,-0x38(%rbp)
  jne    L11
  lea    D9(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  jmp    L9
L11:
  lea    D23(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
L9:
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L2
  call   <__stack_chk_fail@plt>
L2:
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D43
data_type: string
name: unpack_data
arguments: data_label: D39
data_type: string
name: unpack_data
arguments: data_label: D25
data_type: string
name: unpack_data
arguments: data_label: D35
data_type: string
name: unpack_data
arguments: data_label: D9
data_type: string
name: unpack_data
arguments: data_label: D23
data_type: string

tool: D43: Big/Little Endian Testing...

tool: D39: n is at address: 0x%x with value: 0x%x


tool: D25: n is in sequence of [0x%x:0x%x, 0x%x:0x%x, 0x%x:0x%x, 0x%x:0x%x]


tool: D35: Endian test : This is a big endian machine.

tool: D9: Endian test : This is a little endian machine.

tool: D23: Endian test : This is a unknown endian machine.

assistant: ```c
int main() {
  char *p0, *p1, *p2, *p3;
  int n, n0, n1, n2, n3;
  n = 0x01020304;
  p0 = ((char *)&n) + 0;
  p1 = ((char *)&n) + 1;
  p2 = ((char *)&n) + 2;
  p3 = ((char *)&n) + 3;
  n0 = (n & 0xff000000) >> 24;
  n1 = (n & 0x00ff0000) >> 16;
  n2 = (n & 0x0000ff00) >> 8;
  n3 = (n & 0x000000ff) >> 0;
  printf("Big/Little Endian Testing...\n");
  printf("n is at address: 0x%x with value: 0x%x\n", &n, n);
  printf("n is in sequence of [0x%x:0x%x, 0x%x:0x%x, 0x%x:0x%x, 0x%x:0x%x]\n", p0, *p0, p1, *p1, p2, *p2, p3, *p3);
  if ((*p0 == n0) && (*p1 == n1) && (*p2 == n2) && (*p3 == n3))
    printf("Endian test : This is a big endian machine.\n");
  else if ((*p0 == n3) && (*p1 == n2) && (*p2 == n1) && (*p3 == n0))
    printf("Endian test : This is a little endian machine.\n");
  else
    printf("Endian test : This is a unknown endian machine.\n");
  return 0;
}
```