ObjFW  Check-in [4491aefd93]

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Comment:lookup-asm-x86*-win*.S: Obfuscate tagged pointers
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SHA3-256: 4491aefd937697ced417d06b966154557476efb61a60061f94ac4ad7fac17725
User & Date: js on 2020-07-12 13:46:26
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Context
2020-07-12
14:17
Obfuscate tagged pointers on PowerPC/ELF check-in: eee832144e user: js tags: tagged-pointers
13:46
lookup-asm-x86*-win*.S: Obfuscate tagged pointers check-in: 4491aefd93 user: js tags: tagged-pointers
13:31
lookup-asm-arm-elf.S: Obfuscate tagged pointers check-in: 761d528376 user: js tags: tagged-pointers
Changes
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Modified src/runtime/lookup-asm/lookup-asm-x86-win32.S from [a3d86ba076] to [5502257c39].

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	test	eax, eax
	jz	\not_found

	ret

.Ltagged_pointer_\name:

	and	dl, 0xE
	movzx	edx, dl

	mov	eax, offset _objc_tagged_pointer_classes
	mov	edx, [eax+edx*2]
	mov	edx, [edx+32]

	jmp	short .Lmain_\name
.endm

.macro generate_lookup_super name lookup
\name:








>



|
<








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	test	eax, eax
	jz	\not_found

	ret

.Ltagged_pointer_\name:
	xor	edx, _objc_tagged_pointer_secret
	and	dl, 0xE
	movzx	edx, dl

	mov	edx, [_objc_tagged_pointer_classes+edx*2]

	mov	edx, [edx+32]

	jmp	short .Lmain_\name
.endm

.macro generate_lookup_super name lookup
\name:
︙︙

Modified src/runtime/lookup-asm/lookup-asm-x86_64-win64.S from [c662475fba] to [fde9955f30].

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0:
	mov	rcx, r10
	mov	rdx, r11
	jmp	\not_found

.Ltagged_pointer_\name:

	and	cl, 0xE
	movzx	r8, cl

	mov	rax, offset objc_tagged_pointer_classes
	mov	r8, [rax+r8*4]
	mov	r8, [r8+56]

	jmp	short .Lmain_\name
.endm

.macro generate_lookup_super name lookup
\name:








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<








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0:
	mov	rcx, r10
	mov	rdx, r11
	jmp	\not_found

.Ltagged_pointer_\name:
	xor	rcx, objc_tagged_pointer_secret
	and	cl, 0xE
	movzx	r8, cl

	mov	r8, [objc_tagged_pointer_classes+r8*4]

	mov	r8, [r8+56]

	jmp	short .Lmain_\name
.endm

.macro generate_lookup_super name lookup
\name:
︙︙

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