ObjFW  Diff

.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	mov	edx, [esp + 4]
	test	edx, edx
	jz	short returnNilMethod
	jz	short .LreturnNilMethod

	test	dl, 1
	jnz	short .LtaggedPointer_\name

	mov	edx, [edx]
	mov	edx, [edx + 32]

	test	eax, eax
	jz	short 0f

	ret

0:
	call	getEIP
	call	.LgetEIP
	add	eax, offset _GLOBAL_OFFSET_TABLE_
	mov	eax, [eax + \notFound@GOT]
	jmp	eax

.LtaggedPointer_\name:
	call	getEIP
	call	.LgetEIP
	add	eax, offset _GLOBAL_OFFSET_TABLE_

	mov	ecx, [eax + objc_taggedPointerSecret@GOT]
	xor	edx, [ecx]
	and	dl, 0xE
	movzx	edx, dl

.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	mov	edx, [esp + 4]
	mov	eax, [edx]
	test	eax, eax
	jz	short returnNilMethod
	jz	short .LreturnNilMethod

	mov	[esp + 4], eax
	mov	edx, [edx + 4]
	mov	edx, [edx + 32]
	jmp	short .Lmain_\lookup
.type \name, %function
.size \name, .-\name
.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:
	call	getEIP
.LreturnNilMethod:
	call	.LgetEIP
	add	eax, offset _GLOBAL_OFFSET_TABLE_
	lea	eax, [eax + nilMethod@GOTOFF]
	lea	eax, [eax + .LnilMethod@GOTOFF]
	ret

nilMethod:
.LnilMethod:
	xor	eax, eax
	ret

getEIP:
.LgetEIP:
	mov	eax, [esp]
	ret

#if defined(OF_LINUX) || defined(OF_HAIKU) || defined(OF_HURD)
.section .note.GNU-stack, "", %progbits
#endif