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Kernel: Move ThreadRegisters into arch-specific directory

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These are architecture-specific anyway, so they belong in the Arch
directory. This commit also adds ThreadRegisters::set_initial_state to
factor out the logic in Thread.cpp.
This commit is contained in:
Timon Kruiper 2022-12-27 14:04:07 +01:00 • committed by Andrew Kaster
parent 0d2dffb95b
commit a3cbaa3449
6 changed files with 133 additions and 75 deletions
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27
Kernel/Thread.cpp
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@ -77,33 +77,12 @@ Thread::Thread(NonnullLockRefPtr<Process> process, NonnullOwnPtr<Memory::Region>
reset_fpu_state();
// Only IF is set when a process boots.
m_regs.set_flags(0x0202);
#if ARCH(X86_64)
if (m_process->is_kernel_process())
m_regs.cs = GDT_SELECTOR_CODE0;
else
m_regs.cs = GDT_SELECTOR_CODE3 | 3;
#elif ARCH(AARCH64)
TODO_AARCH64();
#else
# error Unknown architecture
#endif
m_regs.cr3 = m_process->address_space().with([](auto& space) { return space->page_directory().cr3(); });
m_kernel_stack_base = m_kernel_stack_region->vaddr().get();
m_kernel_stack_top = m_kernel_stack_region->vaddr().offset(default_kernel_stack_size).get() & ~(FlatPtr)0x7u;
if (m_process->is_kernel_process()) {
m_regs.set_sp(m_kernel_stack_top);
m_regs.set_sp0(m_kernel_stack_top);
} else {
// Ring 3 processes get a separate stack for ring 0.
// The ring 3 stack will be assigned by exec().
m_regs.set_sp0(m_kernel_stack_top);
}
m_process->address_space().with([&](auto& space) {
m_regs.set_initial_state(m_process->is_kernel_process(), *space, m_kernel_stack_top);
});
// We need to add another reference if we could successfully create
// all the resources needed for this thread. The reason for this is that