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[Kernel] Code reentrance for guest fibers.

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[Kernel] Code reentrance using exceptions for guest fibers.
This commit is contained in:
gibbed
2020-12-04 14:57:48 -06:00
committed by Rick Gibbed
parent d420215de1
commit 1513dd235b
4 changed files with 132 additions and 46 deletions
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26
src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
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@@ -205,22 +205,30 @@ dword_result_t NtSuspendThread(dword_t handle, lpdword_t suspend_count_ptr) {
}
DECLARE_XBOXKRNL_EXPORT1(NtSuspendThread, kThreading, kImplemented);
void KeSetCurrentStackPointers(lpvoid_t stack_ptr,
pointer_t<X_KTHREAD> cur_thread,
void KeSetCurrentStackPointers(lpvoid_t stack_ptr, pointer_t<X_KTHREAD> thread,
lpvoid_t stack_alloc_base, lpvoid_t stack_base,
lpvoid_t stack_limit) {
auto thread = XThread::GetCurrentThread();
auto context = thread->thread_state()->context();
context->r[1] = stack_ptr.guest_address();
auto current_thread = XThread::GetCurrentThread();
auto context = current_thread->thread_state()->context();
auto pcr = kernel_memory()->TranslateVirtual<X_KPCR*>(
static_cast<uint32_t>(context->r[13]));
auto pcr =
kernel_memory()->TranslateVirtual<X_KPCR*>((uint32_t)context->r[13]);
thread->stack_alloc_base = stack_alloc_base.value();
thread->stack_base = stack_base.value();
thread->stack_limit = stack_limit.value();
pcr->stack_base_ptr = stack_base.guest_address();
pcr->stack_end_ptr = stack_limit.guest_address();
context->r[1] = stack_ptr.guest_address();
// TODO: Do we need to set the stack info on cur_thread?
// If a fiber is set, and the thread matches, reenter to avoid issues with
// host stack overflowing.
if (thread->fiber_ptr &&
current_thread->guest_object() == thread.guest_address()) {
current_thread->Reenter(static_cast<uint32_t>(context->lr));
}
}
DECLARE_XBOXKRNL_EXPORT1(KeSetCurrentStackPointers, kThreading, kImplemented);
DECLARE_XBOXKRNL_EXPORT2(KeSetCurrentStackPointers, kThreading, kImplemented,
kHighFrequency);
dword_result_t KeSetAffinityThread(lpvoid_t thread_ptr, dword_t affinity,
lpdword_t previous_affinity_ptr) {