ObjFW  Check-in [8e95cb1c77]

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Comment:forwarding: Don't grow the stack twice on ARM64
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SHA3-256: 8e95cb1c77624641a36b737f3b660a7c4e8fe2bdf17c4109146978b892fe35ba
User & Date: js on 2024-04-17 20:45:01
Other Links: manifest | tags
Context
2024-04-17
20:50
Add missing endbr / bti check-in: 171615d20a user: js tags: trunk
20:45
forwarding: Don't grow the stack twice on ARM64 check-in: 8e95cb1c77 user: js tags: trunk
2024-04-16
23:50
Don't use readdir_r check-in: c615b62ed8 user: js tags: trunk
Changes
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Modified src/forwarding/apple-forwarding-arm64.S from [2d0bee101c] to [78c7e0a619].

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.align 2
_OFForward:
_OFForward_stret:
#ifdef HAVE_BTI
	bti	c
#endif

	stp	fp, lr, [sp, #-208]!
	stp	fp, lr, [sp, #-224]!
	mov	fp, sp
	sub	sp, sp, #208

	/* Save all arguments, x8 and x19 */
	stp	x0, x1, [sp]
	stp	x2, x3, [sp, #16]
	stp	x4, x5, [sp, #32]
	stp	x6, x7, [sp, #48]
	stp	x8, x19, [sp, #64]
	stp	x0, x1, [sp, #16]
	stp	x2, x3, [sp, #32]
	stp	x4, x5, [sp, #48]
	stp	x6, x7, [sp, #64]
	stp	x8, x19, [sp, #80]

	/* Save all foating point arguments */
	stp	q0, q1, [sp, #80]
	stp	q2, q3, [sp, #112]
	stp	q4, q5, [sp, #144]
	stp	q6, q7, [sp, #176]
	stp	q0, q1, [sp, #96]
	stp	q2, q3, [sp, #128]
	stp	q4, q5, [sp, #160]
	stp	q6, q7, [sp, #192]

	bl	_object_getClass

	adrp	x19, Lsel_forwardingTargetForSelector_@PAGE
	add	x19, x19, Lsel_forwardingTargetForSelector_@PAGEOFF
	ldr	x19, [x19]

	mov	x1, x19
	bl	_class_respondsToSelector

	cbz	x0, 0f

	ldp	x0, x2, [sp]
	ldp	x0, x2, [sp, #16]
	mov	x1, x19
	bl	_objc_msgSend

	cbz	x0, 0f
	ldr	x1, [sp]
	ldr	x1, [sp, #16]
	cmp	x0, x1
	b.eq	0f

	/* Restore all arguments, x8 and x19, but not x0 */
	ldr	x1, [sp, #8]
	ldp	x2, x3, [sp, #16]
	ldp	x4, x5, [sp, #32]
	ldp	x6, x7, [sp, #48]
	ldp	x8, x19, [sp, #64]
	ldr	x1, [sp, #24]
	ldp	x2, x3, [sp, #32]
	ldp	x4, x5, [sp, #48]
	ldp	x6, x7, [sp, #64]
	ldp	x8, x19, [sp, #80]

	/* Restore all foating point arguments */
	ldp	q0, q1, [sp, #80]
	ldp	q2, q3, [sp, #112]
	ldp	q4, q5, [sp, #144]
	ldp	q6, q7, [sp, #176]
	ldp	q0, q1, [sp, #96]
	ldp	q2, q3, [sp, #128]
	ldp	q4, q5, [sp, #160]
	ldp	q6, q7, [sp, #192]

	mov	sp, fp
	ldp	fp, lr, [sp], #208
	ldp	fp, lr, [sp], #224

	b	_objc_msgSend

0:
	ldp	x0, x1, [sp]
	ldr	x19, [sp, #72]
	ldp	x0, x1, [sp, #16]
	ldr	x19, [sp, #88]

	mov	sp, fp
	ldp	fp, lr, [sp], #208
	ldp	fp, lr, [sp], #224

	b	_OFMethodNotFound

Modified src/forwarding/forwarding-arm64-elf.S from [8f1d6be95f] to [33f2532f58].

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.section .text
OFForward:
OFForward_stret:
#ifdef HAVE_BTI
	bti	c
#endif

	stp	fp, lr, [sp, #-208]!
	stp	fp, lr, [sp, #-224]!
	mov	fp, sp
	sub	sp, sp, #208

	/* Save all arguments, x8 and x19 */
	stp	x0, x1, [sp]
	stp	x2, x3, [sp, #16]
	stp	x4, x5, [sp, #32]
	stp	x6, x7, [sp, #48]
	stp	x8, x19, [sp, #64]
	stp	x0, x1, [sp, #16]
	stp	x2, x3, [sp, #32]
	stp	x4, x5, [sp, #48]
	stp	x6, x7, [sp, #64]
	stp	x8, x19, [sp, #80]

	/* Save all foating point arguments */
	stp	q0, q1, [sp, #80]
	stp	q2, q3, [sp, #112]
	stp	q4, q5, [sp, #144]
	stp	q6, q7, [sp, #176]
	stp	q0, q1, [sp, #96]
	stp	q2, q3, [sp, #128]
	stp	q4, q5, [sp, #160]
	stp	q6, q7, [sp, #192]

	bl	object_getClass

	adrp	x19, .Lsel_forwardingTargetForSelector_
	add	x19, x19, :lo12:.Lsel_forwardingTargetForSelector_

	mov	x1, x19
	bl	class_respondsToSelector

	cbz	x0, 0f

	ldr	x0, [sp]
	ldr	x0, [sp, #16]
	mov	x1, x19
	bl	objc_msg_lookup

	mov	x1, x19
	mov	x19, x0
	ldp	x0, x2, [sp]
	ldp	x0, x2, [sp, #16]
	blr	x19

	cbz	x0, 0f
	ldr	x1, [sp]
	ldr	x1, [sp, #16]
	cmp	x0, x1
	b.eq	0f

	mov	x19, x0
	ldr	x1, [sp, #8]
	ldr	x1, [sp, #24]
	bl	objc_msg_lookup

	mov	x16, x0
	mov	x0, x19

	/* Restore all arguments, x8 and x19, but not x0 */
	ldr	x1, [sp, #8]
	ldp	x2, x3, [sp, #16]
	ldp	x4, x5, [sp, #32]
	ldp	x6, x7, [sp, #48]
	ldp	x8, x19, [sp, #64]
	ldr	x1, [sp, #24]
	ldp	x2, x3, [sp, #32]
	ldp	x4, x5, [sp, #48]
	ldp	x6, x7, [sp, #64]
	ldp	x8, x19, [sp, #80]

	/* Restore all foating point arguments */
	ldp	q0, q1, [sp, #80]
	ldp	q2, q3, [sp, #112]
	ldp	q4, q5, [sp, #144]
	ldp	q6, q7, [sp, #176]
	ldp	q0, q1, [sp, #96]
	ldp	q2, q3, [sp, #128]
	ldp	q4, q5, [sp, #160]
	ldp	q6, q7, [sp, #192]

	mov	sp, fp
	ldp	fp, lr, [sp], #208
	ldp	fp, lr, [sp], #224

	br	x16

0:
	ldp	x0, x1, [sp]
	ldr	x19, [sp, #72]
	ldp	x0, x1, [sp, #16]
	ldr	x19, [sp, #88]

	mov	sp, fp
	ldp	fp, lr, [sp], #208
	ldp	fp, lr, [sp], #224

	b	OFMethodNotFound
.type OFForward, %function
.size OFForward, .-OFForward
.type OFForward_stret, %function
.size OFForward_stret, .-OFForward_stret
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Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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