/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* Jonathan Schleifer <js@webkeks.org>
*
* 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.
*/
#if defined(__x86_64__) && defined(__ELF__)
.intel_syntax noprefix
.globl objc_msg_lookup
.globl objc_msg_lookup_super
.section .text
objc_msg_lookup:
test rdi, rdi
jz ret_nil
mov r8, [rdi]
mov r8, [r8+64]
lookup:
mov rax, [rsi]
movzx ecx, ah
movzx edx, al
shr eax, 16
mov r8, [r8+rax*8]
mov r8, [r8+rcx*8]
mov rax, [r8+rdx*8]
test rax, rax
jz forward
ret
forward:
mov rax, qword ptr objc_forward_handler@GOTPCREL[rip]
jmp [rax]
objc_msg_lookup_super:
mov rax, [rdi]
test rax, rax
jz ret_nil
mov r8, [rdi+8]
mov r8, [r8+64]
mov rdi, rax
jmp lookup
ret_nil:
lea rax, nil_method[rip]
ret
nil_method:
mov rax, rdi
ret
.type objc_msg_lookup, @function
.type objc_msg_lookup_super, @function
.size objc_msg_lookup, forward-objc_msg_lookup
.size objc_msg_lookup_super, ret_nil-objc_msg_lookup_super
#endif