/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* 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"
.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:
testq %rcx, %rcx
jz ret_nil
movq (%rcx), %r8
movq 56(%r8), %r8
.Lmain_\name:
movq %rcx, %r10
movq %rdx, %r11
movq (%rdx), %rax
movzbl %ah, %ecx
movzbl %al, %edx
#ifdef OF_SELUID24
shrl $16, %eax
movq (%r8,%rax,8), %r8
#endif
movq (%r8,%rcx,8), %r8
movq (%r8,%rdx,8), %rax
testq %rax, %rax
jz 0f
ret
0:
movq %r10, %rcx
movq %r11, %rdx
jmp \not_found
.endm
.macro generate_lookup_super name lookup
\name:
movq %rcx, %r8
movq (%rcx), %rcx
testq %rcx, %rcx
jz ret_nil
movq 8(%r8), %r8
movq 56(%r8), %r8
jmp .Lmain_\lookup
.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:
leaq nil_method(%rip), %rax
ret
nil_method:
xorq %rax, %rax
ret