Artifact 55f7a74c19d0803ec311709587a9e6773a0cf4d9dbc27c844c26bb89ed06a3c3:
- File
src/forwarding/forwarding-amd64-elf.S
— part of check-in
[0c332aa2d2]
at
2013-12-27 02:07:14
on branch trunk
— Rework forwarding API and ABI.
It matches the Apple API and ABI now and the forwarding handler itself
determines whether it should forward or not.This moves handling of +[resolve{Class,Instance}Method:] to the runtime
and allows adding new kinds of forwarding without changing the runtime.Also fixes a potential stack problem in the forwarding for MIPS. (user: js, size: 4529) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 * Jonathan Schleifer <js@webkeks.org> * * 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. */ .globl of_forward .globl of_forward_stret .section .text of_forward: pushq %rbp movq %rsp, %rbp /* Save all arguments */ subq $0xC0, %rsp /* 16-byte alignment */ movq %rax, -0x8(%rbp) movq %rdi, -0x10(%rbp) movq %rsi, -0x18(%rbp) movq %rdx, -0x20(%rbp) movq %rcx, -0x28(%rbp) movq %r8, -0x30(%rbp) movq %r9, -0x38(%rbp) movdqa %xmm0, -0x50(%rbp) movdqa %xmm1, -0x60(%rbp) movdqa %xmm2, -0x70(%rbp) movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) call object_getClass@PLT movq %rax, %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call class_respondsToSelector@PLT testq %rax, %rax jz fail movq -0x10(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x10(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x18(%rbp), %rdx call *%rax testq %rax, %rax jz fail cmpq -0x10(%rbp), %rax je fail movq %rax, -0x10(%rbp) movq %rax, %rdi movq -0x18(%rbp), %rsi call objc_msg_lookup@PLT movq %rax, %r11 /* Restore all arguments */ movdqa -0xC0(%rbp), %xmm7 movdqa -0xB0(%rbp), %xmm6 movdqa -0xA0(%rbp), %xmm5 movdqa -0x90(%rbp), %xmm4 movdqa -0x80(%rbp), %xmm3 movdqa -0x70(%rbp), %xmm2 movdqa -0x60(%rbp), %xmm1 movdqa -0x50(%rbp), %xmm0 movq -0x38(%rbp), %r9 movq -0x30(%rbp), %r8 movq -0x28(%rbp), %rcx movq -0x20(%rbp), %rdx movq -0x18(%rbp), %rsi movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 fail: movq -0x10(%rbp), %rdi movq -0x18(%rbp), %rsi movq %rbp, %rsp popq %rbp jmp of_method_not_found@PLT .type of_forward, %function .size of_forward, .-of_forward of_forward_stret: pushq %rbp movq %rsp, %rbp /* Save all arguments */ subq $0xC0, %rsp /* 16-byte alignment */ movq %rax, -0x8(%rbp) movq %rdi, -0x10(%rbp) movq %rsi, -0x18(%rbp) movq %rdx, -0x20(%rbp) movq %rcx, -0x28(%rbp) movq %r8, -0x30(%rbp) movq %r9, -0x38(%rbp) movdqa %xmm0, -0x50(%rbp) movdqa %xmm1, -0x60(%rbp) movdqa %xmm2, -0x70(%rbp) movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) movq %rsi, %rdi call object_getClass@PLT movq %rax, %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call class_respondsToSelector@PLT testq %rax, %rax jz fail_stret movq -0x18(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x18(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x20(%rbp), %rdx call *%rax testq %rax, %rax jz fail_stret cmpq -0x18(%rbp), %rax je fail_stret movq %rax, -0x18(%rbp) movq %rax, %rdi movq -0x20(%rbp), %rsi call objc_msg_lookup_stret@PLT movq %rax, %r11 /* Restore all arguments */ movdqa -0xC0(%rbp), %xmm7 movdqa -0xB0(%rbp), %xmm6 movdqa -0xA0(%rbp), %xmm5 movdqa -0x90(%rbp), %xmm4 movdqa -0x80(%rbp), %xmm3 movdqa -0x70(%rbp), %xmm2 movdqa -0x60(%rbp), %xmm1 movdqa -0x50(%rbp), %xmm0 movq -0x38(%rbp), %r9 movq -0x30(%rbp), %r8 movq -0x28(%rbp), %rcx movq -0x20(%rbp), %rdx movq -0x18(%rbp), %rsi movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 fail_stret: movq -0x10(%rbp), %rdi movq -0x18(%rbp), %rsi movq -0x20(%rbp), %rdx movq %rbp, %rsp popq %rbp jmp of_method_not_found_stret@PLT .type of_forward_stret, %function .size of_forward_stret, .-of_forward_stret init: leaq module(%rip), %rdi jmp __objc_exec_class@PLT .section .ctors, "aw", %progbits .quad init .section .rodata str_forwardingTargetForSelector_: .asciz "forwardingTargetForSelector:" .section .data sel_forwardingTargetForSelector_: .quad str_forwardingTargetForSelector_, 0 .quad 0, 0 symtab: .quad 0, sel_forwardingTargetForSelector_ .short 0, 0 .long 0 .quad 0 module: .quad 8, 32, 0, symtab #ifdef __linux__ .section .note.GNU-stack, "", %progbits #endif