/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-â
âvi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/nt/enum/status.h"
#include "libc/macros.internal.h"
#ifdef __x86_64__

//	@fileoverview NTDLL.DLL Non-Mandatory Importer
//
//	This module lets us import Microsoft's private APIs in a way
//	that ensures executables won't fail to load in the future,
//	should Microsoft ever choose to delete these APIs.

	.initro 202,_init_ntdll.1
	.type	kNtdllProcRvas,@object
kNtdllProcRvas:
	.previous/*
	...
	decentralized content
	...
	*/.initro 202,_init_ntdll.3
	.quad	0
	.previous

	.init.start 202,_init_ntdll
	push	%r12
	push	%r13
	lea	_ntdllmissingno(%rip),%r13
	sub	$32,%rsp
	loadstr	"ntdll.dll",cx
	call	*__imp_GetModuleHandleA(%rip)
	mov	%rax,%r12
0:	lodsq
	test	%rax,%rax
	jz	1f
	.weak	__executable_start
	lea	__executable_start(%rax),%rdx
	mov	%r12,%rcx
	call	*__imp_GetProcAddress(%rip)
	test	%rax,%rax
	cmovz	%r13,%rax
	stosq
	jmp	0b
1:	add	$32,%rsp
	pop	%r13
	pop	%r12
	.init.end 202,_init_ntdll,globl,hidden

	.text.windows
_ntdllmissingno:
	mov	$kNtStatusDllNotFound,%eax
	ret
	.previous

#endif /* __x86_64__ */
