ObjFW  Check-in [18c524e13d]

Overview
Comment:Move x86/Mach-O assembly to Intel syntax

A workaround for the assembler bugs has been found.

Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: 18c524e13d3e573306688211e86e39281e7be6d6043f61db66c31bc6399dad5d
User & Date: js on 2023-10-28 18:04:09
Other Links: manifest | tags
Context
2023-10-28
18:35
Use more local labels in assembly check-in: cb18f26404 user: js tags: trunk
18:04
Move x86/Mach-O assembly to Intel syntax check-in: 18c524e13d user: js tags: trunk
17:05
Move x86/Mach-O assembly to Intel syntax check-in: 54ee8929f0 user: js tags: trunk
Changes
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Modified src/forwarding/apple-forwarding-amd64.S from [9954d86ee8] to [5acd78427e].

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 * file.
 */

#include "config.h"

.globl _OFForward
.globl _OFForward_stret

.intel_syntax noprefix

/* Work around assembler bugs. */
.macro call
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	CALL	$0
	.intel_syntax noprefix
.endmacro
.macro jmp
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	JMP	$0
	.intel_syntax noprefix
.endmacro

.section __TEXT, __objc_methname, cstring_literals
str_forwardingTargetForSelector_:
	.asciz "forwardingTargetForSelector:"

.section __DATA, __objc_selrefs, literal_pointers, no_dead_strip
sel_forwardingTargetForSelector_:
	.quad str_forwardingTargetForSelector_

.section __DATA, __objc_imageinfo, regular, no_dead_strip
	.long 0, 0

.section __TEXT, __text, regular, pure_instructions
_OFForward:
	pushq	%rbp
	movq	%rsp, %rbp
	push	rbp
	mov	rbp, rsp

	/* Save all arguments */
	subq	$0xC0, %rsp	/* 16-byte alignment */
	movq	%rax, -0x8(%rbp)
	movq	%rdi, -0x10(%rbp)
	movq	%rsi, -0x18(%rbp)
	movq	%rdx, -0x20(%rbp)
	movq	%rcx, -0x28(%rbp)
	movq	%r8, -0x30(%rbp)
	movq	%r9, -0x38(%rbp)
	movaps	%xmm0, -0x50(%rbp)
	movaps	%xmm1, -0x60(%rbp)
	movaps	%xmm2, -0x70(%rbp)
	movaps	%xmm3, -0x80(%rbp)
	movaps	%xmm4, -0x90(%rbp)
	movaps	%xmm5, -0xA0(%rbp)
	movaps	%xmm6, -0xB0(%rbp)
	movaps	%xmm7, -0xC0(%rbp)
	sub	rsp, 0xC0	/* 16-byte alignment */
	mov	[rbp - 0x08], rax
	mov	[rbp - 0x10], rdi
	mov	[rbp - 0x18], rsi
	mov	[rbp - 0x20], rdx
	mov	[rbp - 0x28], rcx
	mov	[rbp - 0x30], r8
	mov	[rbp - 0x38], r9
	movaps	[rbp - 0x50], xmm0
	movaps	[rbp - 0x60], xmm1
	movaps	[rbp - 0x70], xmm2
	movaps	[rbp - 0x80], xmm3
	movaps	[rbp - 0x90], xmm4
	movaps	[rbp - 0xA0], xmm5
	movaps	[rbp - 0xB0], xmm6
	movaps	[rbp - 0xC0], xmm7

	call	_object_getClass

	movq	%rax, %rdi
	movq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, rax
	mov	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_class_respondsToSelector

	testq	%rax, %rax
	test	rax, rax
	jz	0f

	movq	-0x10(%rbp), %rdi
	movq	sel_forwardingTargetForSelector_(%rip), %rsi
	movq	-0x18(%rbp), %rdx
	mov	rdi, [rbp - 0x10]
	mov	rsi, [rip + sel_forwardingTargetForSelector_]
	mov	rdx, [rbp - 0x18]
	call	_objc_msgSend

	testq	%rax, %rax
	test	rax, rax
	jz	0f
	cmpq	-0x10(%rbp), %rax
	cmp	rax, [rbp - 0x10]
	je	0f

	movq	%rax, %rdi
	mov	rdi, rax

	/* Restore all arguments, except %rdi */
	movaps	-0xC0(%rbp), %xmm7
	movaps	-0xB0(%rbp), %xmm6
	movaps	-0xA0(%rbp), %xmm5
	movaps	-0x90(%rbp), %xmm4
	movaps	-0x80(%rbp), %xmm3
	movaps	-0x70(%rbp), %xmm2
	movaps	-0x60(%rbp), %xmm1
	movaps	-0x50(%rbp), %xmm0
	movq	-0x38(%rbp), %r9
	movq	-0x30(%rbp), %r8
	movq	-0x28(%rbp), %rcx
	movq	-0x20(%rbp), %rdx
	movq	-0x18(%rbp), %rsi
	movq	-0x8(%rbp), %rax
	movaps	xmm7, [rbp - 0xC0]
	movaps	xmm6, [rbp - 0xB0]
	movaps	xmm5, [rbp - 0xA0]
	movaps	xmm4, [rbp - 0x90]
	movaps	xmm3, [rbp - 0x80]
	movaps	xmm2, [rbp - 0x70]
	movaps	xmm1, [rbp - 0x60]
	movaps	xmm0, [rbp - 0x50]
	mov	r9, [rbp - 0x38]
	mov	r8, [rbp - 0x30]
	mov	rcx, [rbp - 0x28]
	mov	rdx, [rbp - 0x20]
	mov	rsi, [rbp - 0x18]
	mov	rax, [rbp - 0x08]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_objc_msgSend

0:
	movq	-0x10(%rbp), %rdi
	movq	-0x18(%rbp), %rsi
	mov	rdi, [rbp - 0x10]
	mov	rsi, [rbp - 0x18]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_OFMethodNotFound

_OFForward_stret:
	pushq	%rbp
	movq	%rsp, %rbp
	push	rbp
	mov	rbp, rsp

	/* Save all arguments */
	subq	$0xC0, %rsp	/* 16-byte alignment */
	movq	%rax, -0x8(%rbp)
	movq	%rdi, -0x10(%rbp)
	movq	%rsi, -0x18(%rbp)
	movq	%rdx, -0x20(%rbp)
	movq	%rcx, -0x28(%rbp)
	movq	%r8, -0x30(%rbp)
	movq	%r9, -0x38(%rbp)
	movaps	%xmm0, -0x50(%rbp)
	movaps	%xmm1, -0x60(%rbp)
	movaps	%xmm2, -0x70(%rbp)
	movaps	%xmm3, -0x80(%rbp)
	movaps	%xmm4, -0x90(%rbp)
	movaps	%xmm5, -0xA0(%rbp)
	movaps	%xmm6, -0xB0(%rbp)
	movaps	%xmm7, -0xC0(%rbp)
	sub	rsp, 0xC0	/* 16-byte alignment */
	movq	[rbp - 0x08], rax
	movq	[rbp - 0x10], rdi
	movq	[rbp - 0x18], rsi
	movq	[rbp - 0x20], rdx
	movq	[rbp - 0x28], rcx
	movq	[rbp - 0x30], r8
	movq	[rbp - 0x38], r9
	movaps	[rbp - 0x50], xmm0
	movaps	[rbp - 0x60], xmm1
	movaps	[rbp - 0x70], xmm2
	movaps	[rbp - 0x80], xmm3
	movaps	[rbp - 0x90], xmm4
	movaps	[rbp - 0xA0], xmm5
	movaps	[rbp - 0xB0], xmm6
	movaps	[rbp - 0xC0], xmm7

	movq	%rsi, %rdi
	mov	rdi, rsi
	call	_object_getClass

	movq	%rax, %rdi
	movq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, rax
	mov	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_class_respondsToSelector
	testq	%rax, %rax
	test	rax, rax
	jz	0f

	movq	-0x18(%rbp), %rdi
	movq	sel_forwardingTargetForSelector_(%rip), %rsi
	movq	-0x20(%rbp), %rdx
	mov	rdi, [rbp - 0x18]
	mov	rsi, [rip + sel_forwardingTargetForSelector_]
	mov	rdx, [rbp - 0x20]
	call	_objc_msgSend

	testq	%rax, %rax
	test	rax, rax
	jz	0f
	cmpq	-0x18(%rbp), %rax
	cmp	rax, [rbp - 0x18]
	je	0f

	movq	%rax, %rsi
	mov	rsi, rax

	/* Restore all arguments, except %rsi */
	movaps	-0xC0(%rbp), %xmm7
	movaps	-0xB0(%rbp), %xmm6
	movaps	-0xA0(%rbp), %xmm5
	movaps	-0x90(%rbp), %xmm4
	movaps	-0x80(%rbp), %xmm3
	movaps	-0x70(%rbp), %xmm2
	movaps	-0x60(%rbp), %xmm1
	movaps	-0x50(%rbp), %xmm0
	movq	-0x38(%rbp), %r9
	movq	-0x30(%rbp), %r8
	movq	-0x28(%rbp), %rcx
	movq	-0x20(%rbp), %rdx
	movq	-0x10(%rbp), %rdi
	movq	-0x8(%rbp), %rax
	movaps	xmm7, [rbp - 0xC0]
	movaps	xmm6, [rbp - 0xB0]
	movaps	xmm5, [rbp - 0xA0]
	movaps	xmm4, [rbp - 0x90]
	movaps	xmm3, [rbp - 0x80]
	movaps	xmm2, [rbp - 0x70]
	movaps	xmm1, [rbp - 0x60]
	movaps	xmm0, [rbp - 0x50]
	mov	r9, [rbp - 0x38]
	mov	r8, [rbp - 0x30]
	mov	rcx, [rbp - 0x28]
	mov	rdx, [rbp - 0x20]
	mov	rdi, [rbp - 0x10]
	mov	rax, [rbp - 0x08]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_objc_msgSend_stret

0:
	movq	-0x10(%rbp), %rdi
	movq	-0x18(%rbp), %rsi
	movq	-0x20(%rbp), %rdx
	mov	rdi, [rbp - 0x10]
	mov	rsi, [rbp - 0x18]
	mov	rdx, [rbp - 0x20]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_OFMethodNotFound_stret

Modified src/forwarding/forwarding-amd64-macho.S from [3f0c2bdab8] to [0969f9a066].

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#include "config.h"

#include "platform.h"

.globl _OFForward
.globl _OFForward_stret

.intel_syntax noprefix

/* Work around assembler bugs. */
.macro call
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	CALL	$0
	.intel_syntax noprefix
.endmacro
.macro jmp
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	JMP	$0
	.intel_syntax noprefix
.endmacro

.section __TEXT, __text, regular, pure_instructions
_OFForward:
	pushq	%rbp
	movq	%rsp, %rbp
	push	rbp
	mov	rbp, rsp

	/* Save all arguments */
	subq	$0xC0, %rsp	/* 16-byte alignment */
	movq	%rax, -0x8(%rbp)
	movq	%rdi, -0x10(%rbp)
	movq	%rsi, -0x18(%rbp)
	movq	%rdx, -0x20(%rbp)
	movq	%rcx, -0x28(%rbp)
	movq	%r8, -0x30(%rbp)
	movq	%r9, -0x38(%rbp)
	movaps	%xmm0, -0x50(%rbp)
	movaps	%xmm1, -0x60(%rbp)
	movaps	%xmm2, -0x70(%rbp)
	movaps	%xmm3, -0x80(%rbp)
	movaps	%xmm4, -0x90(%rbp)
	movaps	%xmm5, -0xA0(%rbp)
	movaps	%xmm6, -0xB0(%rbp)
	movaps	%xmm7, -0xC0(%rbp)
	sub	rsp, 0xC0	/* 16-byte alignment */
	movq	[rbp - 0x08], rax
	movq	[rbp - 0x10], rdi
	movq	[rbp - 0x18], rsi
	movq	[rbp - 0x20], rdx
	movq	[rbp - 0x28], rcx
	movq	[rbp - 0x30], r8
	movq	[rbp - 0x38], r9
	movaps	[rbp - 0x50], xmm0
	movaps	[rbp - 0x60], xmm1
	movaps	[rbp - 0x70], xmm2
	movaps	[rbp - 0x80], xmm3
	movaps	[rbp - 0x90], xmm4
	movaps	[rbp - 0xA0], xmm5
	movaps	[rbp - 0xB0], xmm6
	movaps	[rbp - 0xC0], xmm7

	call	_object_getClass

	movq	%rax, %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, rax
	lea	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_class_respondsToSelector

	testq	%rax, %rax
	test	rax, rax
	jz	0f

	movq	-0x10(%rbp), %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, [rbp - 0x10]
	lea	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_objc_msg_lookup

	movq	-0x10(%rbp), %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	movq	-0x18(%rbp), %rdx
	movq	rdi, [rbp - 0x10]
	leaq	rsi, [rip + sel_forwardingTargetForSelector_]
	movq	rdx, [rbp - 0x18]
	call	*%rax

	testq	%rax, %rax
	test	rax, rax
	jz	0f
	cmpq	-0x10(%rbp), %rax
	cmp	rax, [rbp - 0x10]
	je	0f

	movq	%rax, -0x10(%rbp)
	mov	[rbp - 0x10], rax

	movq	%rax, %rdi
	movq	-0x18(%rbp), %rsi
	mov	rdi, rax
	mov	rsi, [rbp - 0x18]
	call	_objc_msg_lookup
	movq	%rax, %r11
	mov	r11, rax

	/* Restore all arguments */
	movaps	-0xC0(%rbp), %xmm7
	movaps	-0xB0(%rbp), %xmm6
	movaps	-0xA0(%rbp), %xmm5
	movaps	-0x90(%rbp), %xmm4
	movaps	-0x80(%rbp), %xmm3
	movaps	-0x70(%rbp), %xmm2
	movaps	-0x60(%rbp), %xmm1
	movaps	-0x50(%rbp), %xmm0
	movq	-0x38(%rbp), %r9
	movq	-0x30(%rbp), %r8
	movq	-0x28(%rbp), %rcx
	movq	-0x20(%rbp), %rdx
	movq	-0x18(%rbp), %rsi
	movq	-0x10(%rbp), %rdi
	movq	-0x8(%rbp), %rax
	movaps	xmm7, [rbp - 0xC0]
	movaps	xmm6, [rbp - 0xB0]
	movaps	xmm5, [rbp - 0xA0]
	movaps	xmm4, [rbp - 0x90]
	movaps	xmm3, [rbp - 0x80]
	movaps	xmm2, [rbp - 0x70]
	movaps	xmm1, [rbp - 0x60]
	movaps	xmm0, [rbp - 0x50]
	mov	r9, [rbp - 0x38]
	mov	r8, [rbp - 0x30]
	mov	rcx, [rbp - 0x28]
	mov	rdx, [rbp - 0x20]
	mov	rsi, [rbp - 0x18]
	mov	rdi, [rbp - 0x10]
	mov	rax, [rbp - 0x08]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmpq	*%r11
	jmp	*%r11

0:
	movq	-0x10(%rbp), %rdi
	movq	-0x18(%rbp), %rsi
	mov	rdi, [rbp - 0x10]
	mov	rsi, [rbp - 0x18]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_OFMethodNotFound

_OFForward_stret:
	pushq	%rbp
	movq	%rsp, %rbp
	push	rbp
	mov	rbp, rsp

	/* Save all arguments */
	subq	$0xC0, %rsp	/* 16-byte alignment */
	movq	%rax, -0x8(%rbp)
	movq	%rdi, -0x10(%rbp)
	movq	%rsi, -0x18(%rbp)
	movq	%rdx, -0x20(%rbp)
	movq	%rcx, -0x28(%rbp)
	movq	%r8, -0x30(%rbp)
	movq	%r9, -0x38(%rbp)
	movaps	%xmm0, -0x50(%rbp)
	movaps	%xmm1, -0x60(%rbp)
	movaps	%xmm2, -0x70(%rbp)
	movaps	%xmm3, -0x80(%rbp)
	movaps	%xmm4, -0x90(%rbp)
	movaps	%xmm5, -0xA0(%rbp)
	movaps	%xmm6, -0xB0(%rbp)
	movaps	%xmm7, -0xC0(%rbp)
	sub	rsp, 0xC0	/* 16-byte alignment */
	mov	[rbp - 0x08], rax
	mov	[rbp - 0x10], rdi
	mov	[rbp - 0x18], rsi
	mov	[rbp - 0x20], rdx
	mov	[rbp - 0x28], rcx
	mov	[rbp - 0x30], r8
	mov	[rbp - 0x38], r9
	movaps	[rbp - 0x50], xmm0
	movaps	[rbp - 0x60], xmm1
	movaps	[rbp - 0x70], xmm2
	movaps	[rbp - 0x80], xmm3
	movaps	[rbp - 0x90], xmm4
	movaps	[rbp - 0xA0], xmm5
	movaps	[rbp - 0xB0], xmm6
	movaps	[rbp - 0xC0], xmm7

	movq	%rsi, %rdi
	mov	rdi, rsi
	call	_object_getClass

	movq	%rax, %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, rax
	lea	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_class_respondsToSelector

	testq	%rax, %rax
	test	rax, rax
	jz	0f

	movq	-0x18(%rbp), %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	mov	rdi, [rbp - 0x18]
	lea	rsi, [rip + sel_forwardingTargetForSelector_]
	call	_objc_msg_lookup

	movq	-0x18(%rbp), %rdi
	leaq	sel_forwardingTargetForSelector_(%rip), %rsi
	movq	-0x20(%rbp), %rdx
	mov	rdi, [rbp - 0x18]
	lea	rsi, [rip + sel_forwardingTargetForSelector_]
	mov	rdx, [rbp - 0x20]
	call	*%rax

	testq	%rax, %rax
	test	rax, rax
	jz	0f
	cmpq	-0x18(%rbp), %rax
	cmp	rax, [rbp - 0x18]
	je	0f

	movq	%rax, -0x18(%rbp)
	mov	[rbp - 0x18], rax

	movq	%rax, %rdi
	movq	-0x20(%rbp), %rsi
	mov	rdi, rax
	mov	rsi, [rbp - 0x20]
	call	_objc_msg_lookup_stret
	movq	%rax, %r11
	mov	r11, rax

	/* Restore all arguments */
	movaps	-0xC0(%rbp), %xmm7
	movaps	-0xB0(%rbp), %xmm6
	movaps	-0xA0(%rbp), %xmm5
	movaps	-0x90(%rbp), %xmm4
	movaps	-0x80(%rbp), %xmm3
	movaps	-0x70(%rbp), %xmm2
	movaps	-0x60(%rbp), %xmm1
	movaps	-0x50(%rbp), %xmm0
	movq	-0x38(%rbp), %r9
	movq	-0x30(%rbp), %r8
	movq	-0x28(%rbp), %rcx
	movq	-0x20(%rbp), %rdx
	movq	-0x18(%rbp), %rsi
	movq	-0x10(%rbp), %rdi
	movq	-0x8(%rbp), %rax
	movaps	xmm7, [rbp - 0xC0]
	movaps	xmm6, [rbp - 0xB0]
	movaps	xmm5, [rbp - 0xA0]
	movaps	xmm4, [rbp - 0x90]
	movaps	xmm3, [rbp - 0x80]
	movaps	xmm2, [rbp - 0x70]
	movaps	xmm1, [rbp - 0x60]
	movaps	xmm0, [rbp - 0x50]
	mov	r9, [rbp - 0x38]
	mov	r8, [rbp - 0x30]
	mov	rcx, [rbp - 0x28]
	mov	rdx, [rbp - 0x20]
	mov	rsi, [rbp - 0x18]
	mov	rdi, [rbp - 0x10]
	mov	rax, [rbp - 0x08]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmpq	*%r11
	jmp	*%r11

0:
	movq	-0x10(%rbp), %rdi
	movq	-0x18(%rbp), %rsi
	movq	-0x20(%rbp), %rdx
	mov	rdi, [rbp - 0x10]
	mov	rsi, [rbp - 0x18]
	mov	rdx, [rbp - 0x20]

	movq	%rbp, %rsp
	popq	%rbp
	mov	rsp, rbp
	pop	rbp

	jmp	_OFMethodNotFound_stret

init:
	leaq	module(%rip), %rdi
	lea	rdi, [rip + module]
	jmp	___objc_exec_class

.section __DATA, __mod_init_func, mod_init_funcs
	.quad init

.section __TEXT, __cstring, cstring_literals
str_forwardingTargetForSelector_:
︙

Modified src/runtime/lookup-asm/lookup-asm-amd64-macho.S from [f313fe156e] to [ca53a90db3].

︙
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#include "config.h"

.globl _objc_msg_lookup
.globl _objc_msg_lookup_stret
.globl _objc_msg_lookup_super
.globl _objc_msg_lookup_super_stret

.intel_syntax

/* Work around assembler bugs. */
.macro jmp
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	JMP	$0
	.intel_syntax noprefix
.endmacro
.macro jz
	.att_syntax
	/* Use uppercase instruction to avoid recursion. */
	JZ	$0
	.intel_syntax noprefix
.endmacro

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

	testb	$$1, %dil
	test	dil, 1
	jnz	LtaggedPointer_$0

	movq	(%rdi), %r8
	movq	64(%r8), %r8
	mov	r8, [rdi]
	mov	r8, [r8 + 64]

Lmain_$0:
	movq	(%rsi), %rax
	movzbl	%ah, %ecx
	movzbl	%al, %edx
	mov	rax, [rsi]
	movzx	ecx, ah
	movzx	edx, al
#ifdef OF_SELUID24
	shrl	$$16, %eax
	shr	eax, 16

	movq	(%r8,%rax,8), %r8
	mov	r8, [r8 + 8 * rax]
#endif
	movq	(%r8,%rcx,8), %r8
	movq	(%r8,%rdx,8), %rax
	movq	r8, [r8 + 8 * rcx]
	movq	rax, [r8 + 8 * rdx]

	testq	%rax, %rax
	test	rax, rax
	jz	$1

	ret

LtaggedPointer_$0:
	movq	_objc_taggedPointerSecret@GOTPCREL(%rip), %rax
	xorq	(%rax), %rdi
	andb	$$0xE, %dil
	movzbl	%dil, %r8d
	mov	rax, [rip + _objc_taggedPointerSecret@GOTPCREL]
	xor	rdi, [rax]
	andb	dil, 0xE
	movzx	r8d, dil

	movq	_objc_taggedPointerClasses@GOTPCREL(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	64(%r8), %r8
	mov	rax, [rip + _objc_taggedPointerClasses@GOTPCREL]
	mov	r8, [rax + 4 * r8]
	mov	r8, [r8 + 64]

	jmp	Lmain_$0
.endmacro

.macro GENERATE_LOOKUP_SUPER
$0:
	movq	%rdi, %r8
	movq	(%rdi), %rdi
	testq	%rdi, %rdi
	mov	r8, rdi
	mov	rdi, [rdi]
	test	rdi, rdi
	jz	returnNilMethod

	movq	8(%r8), %r8
	movq	64(%r8), %r8
	movq	r8, [r8 + 8]
	movq	r8, [r8 + 64]
	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
	lea	rax, [rip + nilMethod]
	ret

nilMethod:
	xorq	%rax, %rax
	xor	rax, rax
	ret

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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