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Kernel: Add AArch64 support to sys$fork

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Idan Horowitz 2023-04-02 03:20:15 +03:00 • committed by Andrew Kaster
parent 3fa9c9bda4
commit 8669f4ce45
1 changed files with 8 additions and 3 deletions
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11
Kernel/Syscalls/fork.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -121,8 +122,8 @@ ErrorOr<FlatPtr> Process::sys$fork(RegisterState& regs)
child_first_thread->m_alternative_signal_stack = Thread::current()->m_alternative_signal_stack;
child_first_thread->m_alternative_signal_stack_size = Thread::current()->m_alternative_signal_stack_size;
#if ARCH(X86_64)
auto& child_regs = child_first_thread->m_regs;
#if ARCH(X86_64)
child_regs.rax = 0; // fork() returns 0 in the child :^)
child_regs.rbx = regs.rbx;
child_regs.rcx = regs.rcx;
@ -146,8 +147,12 @@ ErrorOr<FlatPtr> Process::sys$fork(RegisterState& regs)
dbgln_if(FORK_DEBUG, "fork: child will begin executing at {:#04x}:{:p} with stack {:p}, kstack {:p}",
child_regs.cs, child_regs.rip, child_regs.rsp, child_regs.rsp0);
#elif ARCH(AARCH64)
(void)regs;
TODO_AARCH64();
child_regs.x[0] = 0; // fork() returns 0 in the child :^)
for (size_t i = 1; i < array_size(child_regs.x); ++i)
child_regs.x[i] = regs.x[i];
child_regs.spsr_el1 = regs.spsr_el1;
child_regs.elr_el1 = regs.elr_el1;
child_regs.sp_el0 = regs.sp_el0;
#else
# error Unknown architecture
#endif