ObjFW  Diff

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/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
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.globl _objc_msg_lookup_super
.globl _objc_msg_lookup_super_stret

.section __TEXT, __text, regular, pure_instructions
.macro GENERATE_LOOKUP
$0:
	testq	%rdi, %rdi
	jz	returnNilMethod
	jz	LreturnNilMethod

	testb	$$1, %dil
	jnz	LtaggedPointer_$0

	movq	(%rdi), %r8
	movq	64(%r8), %r8

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.endmacro

.macro GENERATE_LOOKUP_SUPER
$0:
	movq	%rdi, %r8
	movq	(%rdi), %rdi
	testq	%rdi, %rdi
	jz	returnNilMethod
	jz	LreturnNilMethod

	movq	8(%r8), %r8
	movq	64(%r8), %r8
	jmp	Lmain_$1
.endmacro

GENERATE_LOOKUP _objc_msg_lookup, _objc_methodNotFound
GENERATE_LOOKUP _objc_msg_lookup_stret, _objc_methodNotFound_stret
GENERATE_LOOKUP_SUPER _objc_msg_lookup_super, _objc_msg_lookup
GENERATE_LOOKUP_SUPER _objc_msg_lookup_super_stret, _objc_msg_lookup_stret

returnNilMethod:
	leaq	nilMethod(%rip), %rax
LreturnNilMethod:
	leaq	LnilMethod(%rip), %rax
	ret

nilMethod:
LnilMethod:
	xorq	%rax, %rax
	ret