ObjFW  Diff

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/*
 * Copyright (c) 2008-2021 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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/*
 * Copyright (c) 2008-2022 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
.globl objc_msg_lookup_stret
.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro generate_lookup name not_found
\name:
	testq	%rcx, %rcx
	jz	ret_nil

	testb	$1, %cl
	jnz	.Ltagged_pointer_\name

	movq	(%rcx), %r8
	movq	56(%r8), %r8

.Lmain_\name:
	movq	%rcx, %r10
	movq	%rdx, %r11








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.globl objc_msg_lookup
.globl objc_msg_lookup_stret
.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	testq	%rcx, %rcx
	jz	returnNilMethod

	testb	$1, %cl
	jnz	.LtaggedPointer_\name

	movq	(%rcx), %r8
	movq	56(%r8), %r8

.Lmain_\name:
	movq	%rcx, %r10
	movq	%rdx, %r11
︙︙
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	jz	0f

	ret

0:
	movq	%r10, %rcx
	movq	%r11, %rdx
	jmp	\not_found

.Ltagged_pointer_\name:
	xorq	objc_tagged_pointer_secret(%rip), %rcx
	andb	$0xE, %cl
	movzbl	%cl, %r8d

	leaq	objc_tagged_pointer_classes(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	56(%r8), %r8

	jmp	.Lmain_\name
.def \name
.scl 2
.type 32
.endef
.endm

.macro generate_lookup_super name lookup
\name:
	movq	%rcx, %r8
	movq	(%rcx), %rcx
	testq	%rcx, %rcx
	jz	ret_nil

	movq	8(%r8), %r8
	movq	56(%r8), %r8
	jmp	.Lmain_\lookup
.def \name
.scl 2
.type 32
.endef
.endm

generate_lookup objc_msg_lookup objc_method_not_found
generate_lookup objc_msg_lookup_stret objc_method_not_found_stret
generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret

ret_nil:
	leaq	nil_method(%rip), %rax
	ret

nil_method:
	xorq	%rax, %rax
	ret








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	jz	0f

	ret

0:
	movq	%r10, %rcx
	movq	%r11, %rdx
	jmp	\notFound

.LtaggedPointer_\name:
	xorq	objc_taggedPointerSecret(%rip), %rcx
	andb	$0xE, %cl
	movzbl	%cl, %r8d

	leaq	objc_taggedPointerClasses(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	56(%r8), %r8

	jmp	.Lmain_\name
.def \name
.scl 2
.type 32
.endef
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	movq	%rcx, %r8
	movq	(%rcx), %rcx
	testq	%rcx, %rcx
	jz	returnNilMethod

	movq	8(%r8), %r8
	movq	56(%r8), %r8
	jmp	.Lmain_\lookup
.def \name
.scl 2
.type 32
.endef
.endm

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
	ret

nilMethod:
	xorq	%rax, %rax
	ret
Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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