/*
* 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"
#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 not_found
\name:
movl 4(%esp), %edx
testl %edx, %edx
jz ret_nil
movl (%edx), %edx
movl 32(%edx), %edx
.Lmain_\name:
movl 8(%esp), %eax
#ifdef OF_SELUID24
movzbl 2(%eax), %ecx
movl (%edx,%ecx,4), %edx
#endif
movzbl 1(%eax), %ecx
movl (%edx,%ecx,4), %edx
movzbl (%eax), %ecx
movl (%edx,%ecx,4), %eax
testl %eax, %eax
jz 0f
ret
0:
call get_eip
1:
addl $_GLOBAL_OFFSET_TABLE_, %eax
movl \not_found@GOT(%eax), %eax
jmp *%eax
.type \name, %function
.size \name, .-\name
.endm
.macro generate_lookup_super name lookup
\name:
movl 4(%esp), %edx
movl (%edx), %eax
cmpl $0, %eax
je ret_nil
movl %eax, 4(%esp)
movl 4(%edx), %edx
movl 32(%edx), %edx
jmp .Lmain_\lookup
.type \name, %function
.size \name, .-\name
.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:
call get_eip
0:
addl $nil_method-0b, %eax
ret
nil_method:
xorl %eax, %eax
ret
get_eip:
movl (%esp), %eax
ret
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif