ObjFW  Check-in [22e2cd67a2]

Overview
Comment:Move x86/Mach-O assembly back to AT&T syntax

Support for the Intel syntax is too buggy in toolchains to be usable.

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Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: 22e2cd67a2f7a53ff2d382ca6d4370436aecbb1a05b8e61be8eb3c299f36fd4f
User & Date: js on 2023-10-31 23:14:36
Other Links: manifest | tags
Context
2023-10-31
23:53
OFMatrix4x4: Add Enhanced 3DNow! implementation check-in: 089a51310c user: js tags: trunk
23:14
Move x86/Mach-O assembly back to AT&T syntax check-in: 22e2cd67a2 user: js tags: trunk
23:06
Move AMD64/Mach-O assembly back to AT&T syntax check-in: 700468b00c user: js tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified src/forwarding/apple-forwarding-x86.S from [fe22007392] to [8d690ddaf5].

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 */

#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, __cstring, cstring_literals
Lstr_forwardingTargetForSelector_:
	.asciz "forwardingTargetForSelector:"

.section __OBJC, __message_refs, literal_pointers, no_dead_strip
Lsel_forwardingTargetForSelector_:
	.long Lstr_forwardingTargetForSelector_

.section __OBJC, __image_info
	.long 0, 0

.section __TEXT, __text, regular, pure_instructions
_OFForward:
	push	ebp
	mov	ebp, esp

	push	ebx
	sub	esp, 20

	call	LgetEIP
0:

	mov	eax, [ebp + 8]
	mov	[esp], eax
	call	_object_getClass

	mov	[esp], eax
	mov	eax, [ebx + Lsel_forwardingTargetForSelector_ - 0b]
	mov	[esp + 4], eax
	call	_class_respondsToSelector

	test	eax, eax
	jz	0f

	mov	eax, [ebp + 8]
	mov	[esp], eax
	mov	eax, [ebx + Lsel_forwardingTargetForSelector_ - 0b]
	mov	[esp + 4], eax
	mov	eax, [ebp + 12]
	mov	[esp + 8], eax
	call	_objc_msgSend

	test	eax, eax
	jz	0f
	cmp	eax, [ebp + 8]
	je	0f

	mov	[ebp + 8], eax

	add	esp, 20
	pop	ebx
	pop	ebp

	jmp	_objc_msgSend

0:
	add	esp, 20
	pop	ebx
	pop	ebp

	jmp	_OFMethodNotFound

_OFForward_stret:
	push	ebp
	mov	ebp, esp

	push	ebx
	sub	esp, 20

	call	LgetEIP
0:

	mov	eax, [ebp + 12]
	mov	[esp], eax
	call	_object_getClass

	mov	[esp], eax
	mov	eax, [ebx + Lsel_forwardingTargetForSelector_ - 0b]
	mov	[esp + 4], eax
	call	_class_respondsToSelector

	test	eax, eax
	jz	0f

	mov	eax, [ebp + 12]
	mov	[esp], eax
	mov	eax, [ebx + Lsel_forwardingTargetForSelector_ - 0b]
	mov	[esp + 4], eax
	mov	eax, [ebp + 16]
	mov	[esp + 8], eax
	call	_objc_msgSend

	test	eax, eax
	jz	0f
	cmp	eax, [ebp + 12]
	je	0f

	mov	[ebp + 12], %eax

	add	esp, 20
	pop	ebx
	pop	ebp

	jmp	_objc_msgSend_stret

0:
	add	esp, 20
	pop	ebx
	pop	ebp

	jmp	_OFMethodNotFound_stret

LgetEIP:
	mov	ebx, [esp]
	ret








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 */

#include "config.h"

.globl _OFForward
.globl _OFForward_stret

















.section __TEXT, __cstring, cstring_literals
Lstr_forwardingTargetForSelector_:
	.asciz "forwardingTargetForSelector:"

.section __OBJC, __message_refs, literal_pointers, no_dead_strip
Lsel_forwardingTargetForSelector_:
	.long Lstr_forwardingTargetForSelector_

.section __OBJC, __image_info
	.long 0, 0

.section __TEXT, __text, regular, pure_instructions
_OFForward:
	pushl	%ebp
	movl	%esp, %ebp

	pushl	%ebx
	subl	$20, %esp

	call	LgetEIP
0:

	movl	8(%ebp), %eax
	movl	%eax, (%esp)
	call	_object_getClass

	movl	%eax, (%esp)
	movl	Lsel_forwardingTargetForSelector_-0b(%ebx), %eax
	movl	%eax, 4(%esp)
	call	_class_respondsToSelector

	testl	%eax, %eax
	jz	0f

	movl	8(%ebp), %eax
	movl	%eax, (%esp)
	movl	Lsel_forwardingTargetForSelector_-0b(%ebx), %eax
	movl	%eax, 4(%esp)
	movl	12(%ebp), %eax
	movl	%eax, 8(%esp)
	call	_objc_msgSend

	testl	%eax, %eax
	jz	0f
	cmpl	8(%ebp), %eax
	je	0f

	movl	%eax, 8(%ebp)

	addl	$20, %esp
	popl	%ebx
	popl	%ebp

	jmp	_objc_msgSend

0:
	addl	$20, %esp
	popl	%ebx
	popl	%ebp

	jmp	_OFMethodNotFound

_OFForward_stret:
	pushl	%ebp
	movl	%esp, %ebp

	pushl	%ebx
	subl	$20, %esp

	call	LgetEIP
0:

	movl	12(%ebp), %eax
	movl	%eax, (%esp)
	call	_object_getClass

	movl	%eax, (%esp)
	movl	Lsel_forwardingTargetForSelector_-0b(%ebx), %eax
	movl	%eax, 4(%esp)
	call	_class_respondsToSelector

	testl	%eax, %eax
	jz	0f

	movl	12(%ebp), %eax
	movl	%eax, (%esp)
	movl	Lsel_forwardingTargetForSelector_-0b(%ebx), %eax
	movl	%eax, 4(%esp)
	movl	16(%ebp), %eax
	movl	%eax, 8(%esp)
	call	_objc_msgSend

	testl	%eax, %eax
	jz	0f
	cmpl	12(%ebp), %eax
	je	0f

	movl	%eax, 12(%ebp)

	addl	$20, %esp
	popl	%ebx
	popl	%ebp

	jmp	_objc_msgSend_stret

0:
	addl	$20, %esp
	popl	%ebx
	popl	%ebp

	jmp	_OFMethodNotFound_stret

LgetEIP:
	movl	(%esp), %ebx
	ret

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