ObjFW  Diff

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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
.macro GENERATE_LOOKUP name notFound
\name:
	cmpwi	%r3, 0
	beq-	ret_nil
	beq-	returnNilMethod

	andi.	%r0, %r3, 1
	bne-	.Ltagged_pointer_\name
	bne-	.LtaggedPointer_\name

	lwz	%r5, 0(%r3)
	lwz	%r5, 32(%r5)

.Lmain_\name:
	lwz	%r8, 0(%r4)
#ifdef OF_SELUID24
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	bl	0f
0:
	mflr	%r30
	addis	%r30, %r30, .Lbiased_got2-0b@ha
	addi	%r30, %r30, .Lbiased_got2-0b@l

	lwz	%r0, .Lgot_\not_found-.Lbiased_got2(%r30)
	lwz	%r0, .Lgot_\notFound-.Lbiased_got2(%r30)
	mtctr	%r0

	lwz	%r30, 8(%r1)
	lwz	%r0, 20(%r1)
	addi	%r1, %r1, 16
	mtlr	%r0

	bctr
#else
	b	\not_found
	b	\notFound
#endif

.Ltagged_pointer_\name:
.LtaggedPointer_\name:
#if defined(OF_PIC)
	mflr	%r7
	bl	0f
0:
	mflr	%r6
	mtlr	%r7
	addis	%r6, %r6, .Lbiased_got2-0b@ha
	addi	%r6, %r6, .Lbiased_got2-0b@l

	lwz	%r5, .Lgot_objc_tagged_pointer_secret-.Lbiased_got2(%r6)
	lwz	%r5, .Lgot_objc_taggedPointerSecret-.Lbiased_got2(%r6)
	lwz	%r5, 0(%r5)
#elif defined(OF_BASEREL)
	addis	%r5, %r13, objc_tagged_pointer_secret@drel@ha
	lwz	%r5, objc_tagged_pointer_secret@drel@l(%r5)
	addis	%r5, %r13, objc_taggedPointerSecret@drel@ha
	lwz	%r5, objc_taggedPointerSecret@drel@l(%r5)
#else
	lis	%r5, objc_tagged_pointer_secret@ha
	lwz	%r5, objc_tagged_pointer_secret@l(%r5)
	lis	%r5, objc_taggedPointerSecret@ha
	lwz	%r5, objc_taggedPointerSecret@l(%r5)
#endif
	xor	%r5, %r3, %r5
	rlwinm	%r5, %r5, 1, 0x1C

#if defined(OF_PIC)
	lwz	%r6, .Lgot_objc_tagged_pointer_classes-.Lbiased_got2(%r6)
	lwz	%r6, .Lgot_objc_taggedPointerClasses-.Lbiased_got2(%r6)
#elif defined(OF_BASEREL)
	addis	%r6, %r13, objc_tagged_pointer_classes@drel@ha
	addi	%r6, %r6, objc_tagged_pointer_classes@drel@l
	addis	%r6, %r13, objc_taggedPointerClasses@drel@ha
	addi	%r6, %r6, objc_taggedPointerClasses@drel@l
#else
	lis	%r6, objc_tagged_pointer_classes@ha
	addi	%r6, %r6, objc_tagged_pointer_classes@l
	lis	%r6, objc_taggedPointerClasses@ha
	addi	%r6, %r6, objc_taggedPointerClasses@l
#endif
	lwzx	%r5, %r6, %r5
	lwz	%r5, 32(%r5)

	b	.Lmain_\name
.type \name, @function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	mr	%r5, %r3
	lwz	%r3, 0(%r3)
	cmpwi	%r3, 0
	beq-	ret_nil
	beq-	returnNilMethod

	lwz	%r5, 4(%r5)
	lwz	%r5, 32(%r5)

	b	.Lmain_\lookup
.type \name, @function
.size \name, .-\name
.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
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

ret_nil:
returnNilMethod:
	mflr	%r0
	bl	get_pc
	bl	getPC
	mtlr	%r0
0:
	addi	%r3, %r3, nil_method-0b
	addi	%r3, %r3, nilMethod-0b
	blr

nil_method:
nilMethod:
	li	%r3, 0
	blr

get_pc:
getPC:
	mflr	%r3
	blr

#ifdef OF_PIC
.section .got2, "aw"
.Lbiased_got2 = .+0x8000
.Lgot_objc_method_not_found:
	.long objc_method_not_found
.Lgot_objc_method_not_found_stret:
	.long objc_method_not_found_stret
.Lgot_objc_tagged_pointer_secret:
	.long objc_tagged_pointer_secret
.Lgot_objc_tagged_pointer_classes:
	.long objc_tagged_pointer_classes
.Lgot_objc_methodNotFound:
	.long objc_methodNotFound
.Lgot_objc_methodNotFound_stret:
	.long objc_methodNotFound_stret
.Lgot_objc_taggedPointerSecret:
	.long objc_taggedPointerSecret
.Lgot_objc_taggedPointerClasses:
	.long objc_taggedPointerClasses
#endif

#ifdef OF_LINUX
.section .note.GNU-stack, "", @progbits
#endif