/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#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:
beqz a0, .LreturnNilMethod
andi t0, a0, 1
bnez t0, .LtaggedPointer_\name
ld t0, (a0)
ld t0, 64(t0)
.Lmain_\name:
#ifdef OF_SELUID24
lbu t1, 2(a1)
slli t1, t1, 3
#endif
lbu t2, 1(a1)
slli t2, t2, 3
lbu t3, (a1)
slli t3, t3, 3
#ifdef OF_SELUID24
add t0, t0, t1
ld t0, (t0)
#endif
add t0, t0, t2
ld t0, (t0)
add t0, t0, t3
ld t0, (t0)
beqz t0, 0f
move a0, t0
ret
0:
tail \notFound@plt
.LtaggedPointer_\name:
la t1, objc_taggedPointerSecret
ld t1, (t1)
xor t1, a0, t1
andi t1, t1, 0xE
slli t1, t1, 2
la t0, objc_taggedPointerClasses
add t0, t0, t1
ld t0, (t0)
ld t0, 64(t0)
j .Lmain_\name
.type \name, @function
.size \name, .-\name
.endm
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
move t0, a0
ld a0, (a0)
beqz a0, .LreturnNilMethod
ld t0, 8(t0)
ld t0, 64(t0)
j .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:
lla a0, .LnilMethod
ret
.LnilMethod:
li a0, 0
ret
#ifdef OF_LINUX
.section .note.GNU-stack, "", @progbits
#endif