user: What would the C source look like for the assembly code provided here?

```asm
<makesignal>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x128,%rsp
  mov    %rdi,-0x118(%rbp)
  mov    %rsi,-0x120(%rbp)
  mov    %rdx,-0x128(%rbp)
  mov    %rcx,-0xc8(%rbp)
  mov    %r8,-0xc0(%rbp)
  mov    %r9,-0xb8(%rbp)
  test   %al,%al
  je     L21
  movaps %xmm0,-0xb0(%rbp)
  movaps %xmm1,-0xa0(%rbp)
  movaps %xmm2,-0x90(%rbp)
  movaps %xmm3,-0x80(%rbp)
  movaps %xmm4,-0x70(%rbp)
  movaps %xmm5,-0x60(%rbp)
  movaps %xmm6,-0x50(%rbp)
  movaps %xmm7,-0x40(%rbp)
L21:
  mov    %fs:0x28,%rax
  mov    %rax,-0xe8(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%r13
  mov    D19(%rip),%rax
  mov    (%rax),%ebx
  movslq %ebx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x108(%rbp)
  movslq %ebx,%rax
  mov    %rax,-0x140(%rbp)
  movq   $0x0,-0x138(%rbp)
  movslq %ebx,%rax
  mov    %rax,-0x150(%rbp)
  movq   $0x0,-0x148(%rbp)
  movslq %ebx,%rax
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L66:
  cmp    %rdx,%rsp
  je     L31
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L66
L31:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L75
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L75:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x100(%rbp)
  mov    D19(%rip),%rax
  mov    (%rax),%r12d
  movslq %r12d,%rax
  sub    $0x1,%rax
  mov    %rax,-0xf8(%rbp)
  movslq %r12d,%rax
  mov    %rax,%r14
  mov    $0x0,%r15d
  movslq %r12d,%rax
  mov    %rax,%r10
  mov    $0x0,%r11d
  movslq %r12d,%rax
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L34:
  cmp    %rdx,%rsp
  je     L60
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L34
L60:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L38
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L38:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0xf0(%rbp)
  mov    -0x128(%rbp),%rdx
  mov    -0x10c(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <va_start@plt>
  mov    -0x128(%rbp),%rcx
  mov    -0x120(%rbp),%rdx
  mov    -0xf0(%rbp),%rax
  mov    %r12d,%esi
  mov    %rax,%rdi
  call   <fmtship@plt>
  mov    -0x10c(%rbp),%ecx
  mov    -0xf0(%rbp),%rdx
  mov    -0x100(%rbp),%rax
  mov    %ebx,%esi
  mov    %rax,%rdi
  call   <vsnprintf@plt>
  mov    -0x10c(%rbp),%eax
  mov    %eax,%edi
  call   <va_end@plt>
  mov    -0x100(%rbp),%rdx
  mov    -0x118(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <send_signal@plt>
  mov    %r13,%rsp
  nop
  mov    -0xe8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L52
  call   <__stack_chk_fail@plt>
L52:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
void makesignal(struct ship *from, const char *fmt, struct ship *ship, ...) {
  char message[BUFSIZ];
  char format[BUFSIZ];
  va_list ap;
  va_start(ap, ship);
  fmtship(format, sizeof(format), fmt, ship);
  vsnprintf(message, sizeof(message), format, ap);
  va_end(ap);
  send_signal(from, message);
}
```