Artifact dba62cdfa5685c66dd026db7dfe85b7212ead53683343e840ef3a9165bfb8c10:
- File
src/runtime/lookup-asm/lookup-asm-amd64-elf.S
— part of check-in
[de552578e7]
at
2024-02-26 20:32:55
on branch 1.0
— Use <cet.h> and _CET_ENDBR macro
This only uses endbr32/endbr64 when actually needed and emits the
necessary .note.gnu.property. (user: js, size: 2161) [annotate] [blame] [check-ins using] [more...]
/* * 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" #ifdef HAVE_CET_H # include <cet.h> #else # define _CET_ENDBR #endif .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: _CET_ENDBR testq %rdi, %rdi jz returnNilMethod testb $1, %dil jnz .LtaggedPointer_\name movq (%rdi), %r8 movq 64(%r8), %r8 .Lmain_\name: movq (%rsi), %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 \notFound@PLT ret .LtaggedPointer_\name: movq objc_taggedPointerSecret@GOTPCREL(%rip), %rax xorq (%rax), %rdi andb $0xE, %dil movzbl %dil, %r8d movq objc_taggedPointerClasses@GOTPCREL(%rip), %rax movq (%rax,%r8,4), %r8 movq 64(%r8), %r8 jmp .Lmain_\name .type \name, %function .size \name, .-\name .endm .macro GENERATE_LOOKUP_SUPER name lookup \name: _CET_ENDBR movq %rdi, %r8 movq (%rdi), %rdi testq %rdi, %rdi jz returnNilMethod movq 8(%r8), %r8 movq 64(%r8), %r8 jmp .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 returnNilMethod: leaq nilMethod(%rip), %rax ret nilMethod: xorq %rax, %rax ret #if defined(OF_LINUX) || defined(OF_HAIKU) || defined(OF_HURD) .section .note.GNU-stack, "", %progbits #endif