ObjFW  Check-in [8648662754]

Overview
Comment:Revert lookup-asm-x86_64-elf.S back to AT&T syntax

This is for consistency with the Mach-O version.

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SHA3-256: 8648662754de254c531280a10a49f38cc1e9c78847b153a7aebe389bf549b3a8
User & Date: js on 2021-02-01 00:11:21
Other Links: manifest | tags
Context
2021-02-01
00:39
Revert lookup-asm-x86-win32.S back to AT&T syntax check-in: 603524c162 user: js tags: trunk
00:11
Revert lookup-asm-x86_64-elf.S back to AT&T syntax check-in: 8648662754 user: js tags: trunk
2021-01-31
23:52
Revert lookup-asm-x86_64-macho.S to AT&T syntax check-in: b57d18acaa user: js tags: trunk
Changes
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Modified src/runtime/lookup-asm/lookup-asm-x86_64-elf.S from [70f37dd9e8] to [b420f1d31a].

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 * file.
 */

#include "config.h"

#include "platform.h"

.intel_syntax noprefix

.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
\name:
	test	rdi, rdi
	jz	short ret_nil
	testq	%rdi, %rdi
	jz	ret_nil

	bt	edi, 0
	jc	short .Ltagged_pointer_\name
	btl	$0, %edi
	jc	.Ltagged_pointer_\name

	mov	r8, [rdi]
	mov	r8, [r8+64]
	movq	(%rdi), %r8
	movq	64(%r8), %r8

.Lmain_\name:
	mov	rax, [rsi]
	movzx	ecx, ah
	movzx	edx, al
	movq	(%rsi), %rax
	movzbl	%ah, %ecx
	movzbl	%al, %edx
#ifdef OF_SELUID24
	shr	eax, 16
	shrl	$16, %eax

	mov	r8,  [r8+rax*8]
	movq	(%r8,%rax,8), %r8
#endif
	mov	r8,  [r8+rcx*8]
	mov	rax, [r8+rdx*8]
	movq	(%r8,%rcx,8), %r8
	movq	(%r8,%rdx,8), %rax

	test	rax, rax
	jz	short \not_found@PLT
	testq	%rax, %rax
	jz	\not_found@PLT

	ret

.Ltagged_pointer_\name:
	mov	rax, [rip+objc_tagged_pointer_secret@GOTPCREL]
	xor	rdi, [rax]
	and	dil, 0xE
	movzx	r8, dil
	movq	objc_tagged_pointer_secret@GOTPCREL(%rip), %rax
	xorq	(%rax), %rdi
	andb	$0xE, %dil
	movzbl	%dil, %r8d

	mov	rax, [rip+objc_tagged_pointer_classes@GOTPCREL]
	mov	r8, [rax+r8*4]
	mov	r8, [r8+64]
	movq	objc_tagged_pointer_classes@GOTPCREL(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	64(%r8), %r8

	jmp	short .Lmain_\name
	jmp	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup
\name:
	mov	r8, rdi
	mov	rdi, [rdi]
	test	rdi, rdi
	jz	short ret_nil
	movq	%rdi, %r8
	movq	(%rdi), %rdi
	testq	%rdi, %rdi
	jz	ret_nil

	mov	r8, [r8+8]
	mov	r8, [r8+64]
	jmp	short .Lmain_\lookup
	movq	8(%r8), %r8
	movq	64(%r8), %r8
	jmp	.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

ret_nil:
	lea	rax, [rip+nil_method]
	leaq	nil_method(%rip), %rax
	ret

nil_method:
	xor	rax, rax
	xorq	%rax, %rax
	ret

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

Modified src/runtime/lookup-asm/lookup-asm-x86_64-macho.S from [799d4a8d9c] to [caad23b303].

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	ret

Ltagged_pointer_$0:
	movq	_objc_tagged_pointer_secret@GOTPCREL(%rip), %rax
	xorq	(%rax), %rdi
	andb	$$0xE, %dil
	movzbq	%dil, %r8
	movzbl	%dil, %r8d

	movq	_objc_tagged_pointer_classes@GOTPCREL(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	64(%r8), %r8

	jmp	Lmain_$0
.endmacro
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generate_lookup_super _objc_msg_lookup_super_stret, _objc_msg_lookup_stret

ret_nil:
	leaq	nil_method(%rip), %rax
	ret

nil_method:
	movq	%rdi, %rax
	xorq	%rax, %rax
	ret

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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