ObjFW  Check-in [55e786c880]

Overview
Comment:Obfuscate tagged pointers on SPARC/ELF
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Timelines: family | ancestors | descendants | both | tagged-pointers
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SHA3-256: 55e786c88059b29dc676c9cf66f68ad5d125dcfd322a9d6ae33c9cc551d2e7c4
User & Date: js on 2020-07-12 15:17:46
Other Links: branch diff | manifest | tags
Context
2020-07-12
18:00
Merge trunk into branch "tagged-pointers" check-in: aba47e526e user: js tags: tagged-pointers
15:17
Obfuscate tagged pointers on SPARC/ELF check-in: 55e786c880 user: js tags: tagged-pointers
14:17
Obfuscate tagged pointers on PowerPC/ELF check-in: eee832144e user: js tags: tagged-pointers
Changes
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Modified src/runtime/lookup-asm/lookup-asm-sparc-elf.S from [e419c60c5d] to [77dbe58098].

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0:
	mov	%o7, %g1
	call	\not_found
	 mov	%g1, %o7

.Ltagged_pointer_\name:
	and	%o0, 0xE, %o2
	sll	%o2, 1, %o2

#ifdef OF_PIC
	mov	%o7, %g1
	sethi	%hi(_GLOBAL_OFFSET_TABLE_ - 4), %o3
	call	0f
	 or	%o3, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o3
0:
	add	%o7, %o3, %o3
	mov	%g1, %o7


	sethi	%hi(objc_tagged_pointer_classes), %o0
	or	%o0, %lo(objc_tagged_pointer_classes), %o0

	ld	[%o3 + %o0], %o0
#else





	sethi	%hi(objc_tagged_pointer_classes), %o0
	or	%o0, %lo(objc_tagged_pointer_classes), %o0


#endif
	ld	[%o0 + %o2], %o2

	ba	.Lmain_\name
	 ld	[%o2 + 32], %o2
.type \name, %function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup








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0:
	mov	%o7, %g1
	call	\not_found
	 mov	%g1, %o7

.Ltagged_pointer_\name:



#ifdef OF_PIC
	mov	%o7, %g1
	sethi	%hi(_GLOBAL_OFFSET_TABLE_-4), %o3
	call	0f
	 or	%o3, %lo(_GLOBAL_OFFSET_TABLE_+4), %o3
0:
	add	%o7, %o3, %o3
	mov	%g1, %o7
#endif

	sethi	%hi(objc_tagged_pointer_secret), %o2
	or	%o2, %lo(objc_tagged_pointer_secret), %o2
#ifdef OF_PIC
	ld	[%o3 + %o2], %o2
#endif
	ld	[%o2], %o2
	xor	%o0, %o2, %o0
	and	%o0, 0xE, %o0
	sll	%o0, 1, %o0

	sethi	%hi(objc_tagged_pointer_classes), %o2
	or	%o2, %lo(objc_tagged_pointer_classes), %o2
#ifdef OF_PIC
	ld	[%o3 + %o2], %o2
#endif

	ld	[%o2 + %o0], %o2
	ba	.Lmain_\name
	 ld	[%o2 + 32], %o2
.type \name, %function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup
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generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret

ret_nil:
#ifdef OF_PIC
	mov	%o7, %g1

	sethi	%hi(_GLOBAL_OFFSET_TABLE_ - 4), %o1
	call	0f
	 add	%o1, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o1
0:
	add	%o7, %o1, %o1

	sethi	%hi(nil_method), %o0
	or	%o0, %lo(nil_method), %o0

	jmpl	%g1 + 8, %g0








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generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret

ret_nil:
#ifdef OF_PIC
	mov	%o7, %g1

	sethi	%hi(_GLOBAL_OFFSET_TABLE_-4), %o1
	call	0f
	 add	%o1, %lo(_GLOBAL_OFFSET_TABLE_+4), %o1
0:
	add	%o7, %o1, %o1

	sethi	%hi(nil_method), %o0
	or	%o0, %lo(nil_method), %o0

	jmpl	%g1 + 8, %g0
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Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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