user: Demonstrate the C code that generates the assembly output below:

```asm
<sprintf>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  mov    $0x20,%edi
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,0x8(%rsp)
  call   <kmalloc@plt>
  mov    %rax,%r14
  mov    0x8(%rsp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,0x8(%rsp)
  movsbl (%rax),%edx
  test   %edx,%edx
  je     L86
  mov    %edx,%ecx
  lea    0x10(%rsp),%rdi
  lea    D4(%rip),%r15
  xor    %ebx,%ebx
  jmp    L74
  nopw   0x0(%rax,%rax,1)
L78:
  movslq %ebx,%rax
  add    $0x1,%ebx
  mov    %cl,(%r12,%rax,1)
  mov    0x8(%rsp),%rax
L26:
  lea    0x1(%rax),%rdx
  mov    %rdx,0x8(%rsp)
  movsbl (%rax),%edx
  mov    %edx,%ecx
  test   %edx,%edx
  je     L86
L74:
  cmp    $0x25,%edx
  jne    L78
  movsbl 0x1(%rax),%esi
  lea    0x2(%rax),%r13
  lea    0x8(%rdi),%rbp
  mov    %r13,0x8(%rsp)
  lea    -0x64(%rsi),%eax
  cmp    $0x14,%al
  ja     L25
  movzbl %al,%eax
  movslq (%r15,%rax,4),%rax
  add    %r15,%rax
  notrack jmp *%rax
  nopw   0x0(%rax,%rax,1)
L25:
  mov    (%rdi),%edx
  movslq %ebx,%rax
  mov    %rbp,%rdi
  add    $0x1,%ebx
  mov    %dl,(%r12,%rax,1)
  mov    %r13,%rax
  jmp    L26
  nopl   0x0(%rax)
  mov    (%rdi),%edx
  mov    %r14,%rdi
  call   <kernel_itoa@plt>
  mov    %r14,%rsi
L103:
  movzbl (%rsi),%edx
  test   %dl,%dl
  je     L36
L94:
  lea    0x1(%rbx),%eax
  movslq %ebx,%rbx
  cltq
  sub    %rbx,%rsi
  nopw   0x0(%rax,%rax,1)
L61:
  mov    %dl,-0x1(%r12,%rax,1)
  mov    %eax,%ebx
  add    $0x1,%rax
  movzbl -0x1(%rsi,%rax,1),%edx
  test   %dl,%dl
  jne    L61
L36:
  mov    %r13,%rax
  mov    %rbp,%rdi
  jmp    L26
  movss  (%rdi),%xmm0
  mov    $0x2,%esi
  mov    %r14,%rdi
  call   <kernel_ftoa@plt>
  mov    %r14,%rsi
  jmp    L103
  mov    (%rdi),%rsi
  test   %rsi,%rsi
  jne    L103
  lea    D12(%rip),%rsi
  mov    $0x28,%edx
  jmp    L94
  nopl   0x0(%rax,%rax,1)
L86:
  mov    %r14,%rdi
  mov    $0x20,%esi
  call   <kfree@plt>
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: retrieve_data
arguments: label: D12
datatype: string

tool: D12: (null)

assistant: ```c
int sprintf(char *string, const char *format, ...) {
  char **arg = (char **)&format;
  char *buffer = (char *)kmalloc(32);
  int _char;
  int i = 0;
  arg++;
  while ((_char = *format++) != 0) {
    if (_char != '%') {
      string[i++] = _char;
    } else {
      char *ptr;
      _char = *format++;
      switch (_char) {
      case 'd':
      case 'u':
      case 'x': {
        kernel_itoa(buffer, _char, *((int *)arg++));
        ptr = buffer;
        goto string;
        break;
      }
      case 'f': {
        kernel_ftoa(buffer, 2, *((float *)arg++));
        ptr = buffer;
        goto string;
        break;
      }
      case 's': {
        ptr = *arg++;
        if (!ptr) {
          ptr = "(null)";
        }
      string : {
        while (*ptr) {
          string[i++] = *ptr++;
        }
        break;
      }
      }
      default: {
        string[i++] = *((int *)arg++);
        break;
      }
      }
    }
  }
  kfree(buffer, 32);
  return 0;
}
```