ObjFW  Check-in [a0e61a4760]

Overview
Comment:lookup-asm-powerpc-elf.S: Support tagged pointers
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SHA3-256: a0e61a47608ae351f9b54dfbee4d0645ff03abd482bf98dff324d95fe3ca43c5
User & Date: js on 2020-07-08 19:52:02
Other Links: branch diff | manifest | tags
Context
2020-07-09
00:11
lookup-asm-arm-elf.S: Support tagged pointers check-in: eb007abba9 user: js tags: tagged-pointers
2020-07-08
19:52
lookup-asm-powerpc-elf.S: Support tagged pointers check-in: a0e61a4760 user: js tags: tagged-pointers
00:17
Merge trunk into branch "tagged-pointers" check-in: 3e57593e8d user: js tags: tagged-pointers
Changes
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Modified src/runtime/lookup-asm/lookup-asm-powerpc-elf.S from [5f9a77b0a0] to [022ff654de].

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.section .text
.macro generate_lookup name not_found
\name:
	cmpwi	%r3, 0
	beq-	ret_nil

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

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

.Lmain_\name:
	lwz	%r8, 0(%r4)
#ifdef OF_SELUID24
	rlwinm	%r6, %r8, 18, 0x3FC
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	cmpwi	%r5, 0
	beq-	0f

	mr	%r3, %r5
	blr

0:
	stwu	%r1, -16(%r1)
	mflr	%r0	
	stw	%r0, 20(%r1)
	stw	%r30, 8(%r1)
	b	\not_found@plt

	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)
	mtctr	%r0

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

	bctr

.Ltagged_pointer_\name:
	mflr	%r7
	bl	0f
0:
	mflr	%r6
	mtlr	%r7
	addis	%r6, %r6, .Lbiased_got2-0b@ha
	addi	%r6, %r6, .Lbiased_got2-0b@l

	rlwinm	%r5, %r3, 1, 0x1C

	lwz	%r6, .Lgot_objc_tagged_pointer_classes-.Lbiased_got2(%r6)
	lwzx	%r5, %r6, %r5
	lwz	%r5, 32(%r5)

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

.macro generate_lookup_super name lookup
\name:
	mr	%r5, %r3
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	li	%r3, 0
	blr

get_pc:
	mflr	%r3
	blr

.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_classes:
	.long objc_tagged_pointer_classes

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

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