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/* ========================================
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
======================================== */
#include <HALKit/AMD64/Processor.h>
#include <KernelKit/ProcessScheduler.h>
namespace Kernel {
/***********************************************************************************/
/// @brief Unimplemented function (crashes by default)
/// @param
/***********************************************************************************/
EXTERN_C Void __ne_pure_call(USER_PROCESS* process) {
if (process) process->Crash();
}
/***********************************************************************************/
/// @brief Validate user stack.
/// @param stack_ptr the frame pointer.
/***********************************************************************************/
EXTERN_C Bool hal_check_task(HAL::StackFramePtr stack_ptr) {
if (!stack_ptr) return No;
return stack_ptr->SP > 0 && stack_ptr->IP > 0;
}
/// @brief Wakes up thread.
/// Wakes up thread from the hang state.
Void mp_wakeup_thread(HAL::StackFrame* stack) {
if (!hal_check_task(stack)) return;
// RIP is always in R15. R15 is reserved for the RIP.
stack->IP = stack->R15;
Kernel::UserProcessHelper::StartScheduling();
}
/// @brief makes the thread sleep on a loop.
/// hooks and hangs thread to prevent code from executing.
Void mp_hang_thread(HAL::StackFrame* stack) {
if (!hal_check_task(stack)) return;
// Store IP in R15
stack->R15 = stack->IP;
stack->IP = 0UL;
}
} // namespace Kernel
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