/*
* Copyright (c) 2008-2024 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"
.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:
#ifdef HAVE_BTI
bti c
#endif
cbz x0, .LreturnNilMethod
tst x0, #1
b.ne .LtaggedPointer_\name
ldr x2, [x0]
ldr x2, [x2, #64]
.Lmain_\name:
#ifdef OF_SELUID24
ldrb w3, [x1, #2]
ldr x2, [x2, x3, lsl #3]
#endif
ldrb w3, [x1, #1]
ldr x2, [x2, x3, lsl #3]
ldrb w3, [x1]
ldr x2, [x2, x3, lsl #3]
cbz x2, \notFound
mov x0, x2
ret
.LtaggedPointer_\name:
adrp x2, :got:objc_taggedPointerSecret
ldr x2, [x2, #:got_lo12:objc_taggedPointerSecret]
ldr x2, [x2]
eor x0, x0, x2
and x0, x0, #0xE
lsl x0, x0, #2
adrp x2, :got:objc_taggedPointerClasses
ldr x2, [x2, #:got_lo12:objc_taggedPointerClasses]
ldr x2, [x2, x0]
ldr x2, [x2, #64]
b .Lmain_\name
.type \name, %function
.size \name, .-\name
.endm
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
#ifdef HAVE_BTI
bti c
#endif
mov x2, x0
ldr x0, [x0]
cbz x0, .LreturnNilMethod
ldr x2, [x2, #8]
ldr x2, [x2, #64]
b .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
.LreturnNilMethod:
adr x0, .LnilMethod
ret
.LnilMethod:
mov x0, #0
ret
#if defined(OF_LINUX) || defined(OF_HAIKU) || defined(OF_HURD)
.section .note.GNU-stack, "", %progbits
#endif