Artifact a240f9cb415258165465ef05293daf231a62da398b67c57a9e47cb519154b5e4:
- File
src/runtime/lookup-asm/lookup-asm-x86-elf.S
— part of check-in
[a338982b3b]
at
2023-10-25 22:26:18
on branch trunk
— Move x86/ELF assembly back to Intel syntax
This used to be in Intel syntax, but was moved back to AT&T syntax for
consistency with the Mach-O version, where the assembler doesn't support
the Intel syntax properly. However, it makes more sense to use Intel
syntax where possible. (user: js, size: 2408) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im> * * All rights reserved. * * This file is part of ObjFW. It may be distributed under the terms of the * Q Public License 1.0, which can be found in the file LICENSE.QPL included in * the packaging of this file. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * 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 notFound \name: mov edx, [esp + 4] test edx, edx jz short returnNilMethod test dl, 1 jnz short .LtaggedPointer_\name mov edx, [edx] mov edx, [edx + 32] .Lmain_\name: mov eax, [esp + 8] #ifdef OF_SELUID24 movzx ecx, byte ptr [eax + 2] mov edx, [edx + 4 * ecx] #endif movzx ecx, byte ptr [eax + 1] mov edx, [edx + 4 * ecx] movzx ecx, byte ptr [eax] mov eax, [edx + 4 * ecx] test eax, eax jz short 0f ret 0: call getEIP add eax, offset _GLOBAL_OFFSET_TABLE_ mov eax, [eax + \notFound@GOT] jmp eax .LtaggedPointer_\name: call getEIP add eax, offset _GLOBAL_OFFSET_TABLE_ mov ecx, [eax + objc_taggedPointerSecret@GOT] xor edx, [ecx] and dl, 0xE movzx edx, dl mov eax, [eax + objc_taggedPointerClasses@GOT] mov edx, [eax + 2 * edx] mov edx, [edx + 32] jmp short .Lmain_\name .type \name, %function .size \name, .-\name .endm .macro GENERATE_LOOKUP_SUPER name lookup \name: mov edx, [esp + 4] mov eax, [edx] test eax, eax jz short returnNilMethod mov [esp + 4], eax mov edx, [edx + 4] mov edx, [edx + 32] jmp short .Lmain_\lookup .type \name, %function .size \name, .-\name .endm GENERATE_LOOKUP objc_msg_lookup objc_methodNotFound GENERATE_LOOKUP objc_msg_lookup_stret objc_methodNotFound_stret GENERATE_LOOKUP_SUPER objc_msg_lookup_super objc_msg_lookup GENERATE_LOOKUP_SUPER objc_msg_lookup_super_stret objc_msg_lookup_stret returnNilMethod: call getEIP add eax, offset _GLOBAL_OFFSET_TABLE_ lea eax, [eax + nilMethod@GOTOFF] ret nilMethod: xor eax, eax ret getEIP: mov eax, [esp] ret #if defined(OF_LINUX) || defined(OF_HAIKU) || defined(OF_HURD) .section .note.GNU-stack, "", %progbits #endif