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Kernel: Only get register dump when we have a trap

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Co-authored-by: Tom <tomut@yahoo.com>
This commit is contained in:
Andreas Kling 2021-08-08 23:29:02 +02:00
parent cebdb0b575
commit b7129c57df
1 changed files with 3 additions and 3 deletions
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6
Kernel/Scheduler.cpp
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@ -316,8 +316,8 @@ bool Scheduler::context_switch(Thread* thread)
enter_current(*from_thread, false);
VERIFY(thread == Thread::current());
if (thread->process().is_user_process()) {
auto& regs = Thread::current()->get_register_dump_from_stack();
if (thread->process().is_user_process() && thread->previous_mode() != Thread::PreviousMode::KernelMode && thread->current_trap()) {
auto& regs = thread->get_register_dump_from_stack();
auto iopl = get_iopl_from_eflags(regs.flags());
if (iopl != 0) {
PANIC("Switched to thread {} with non-zero IOPL={}", Thread::current()->tid().value(), iopl);
@ -346,7 +346,7 @@ void Scheduler::enter_current(Thread& prev_thread, bool is_first)
} else if (!is_first) {
// Check if we have any signals we should deliver (even if we don't
// end up switching to another thread).
if (!current_thread->is_in_block() && current_thread->previous_mode() != Thread::PreviousMode::KernelMode) {
if (!current_thread->is_in_block() && current_thread->previous_mode() != Thread::PreviousMode::KernelMode && current_thread->current_trap()) {
ScopedSpinLock lock(current_thread->get_lock());
if (current_thread->state() == Thread::Running && current_thread->pending_signals_for_state()) {
current_thread->dispatch_one_pending_signal();