Migrate KE subsystem to C++

2025-09-09 23:20:50 +02:00
parent 465a23633e
commit 4947f788d5
52 changed files with 2213 additions and 710 deletions
--- a/xtoskrnl/ke/i686/kthread.cc
+++ b/xtoskrnl/ke/i686/kthread.cc
@@ -0,0 +1,122 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/i686/kthread.cc
+ * DESCRIPTION:     I686 thread manipulation support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.hh>
+
+
+/* Kernel Library */
+namespace KE
+{
+
+/**
+ * Initializes CPU architecture dependent context of a thread.
+ *
+ * @param Thread
+ *        Supplies a pointer to the thread being initialized.
+ *
+ * @param SystemRoutine
+ *        Supplies a pointer to the routine called during first scheduling.
+ *
+ * @param StartRoutine
+ *        Supplies a pointer to the routine called during thread startup.
+ *
+ * @param StartContext
+ *        Supplies a pointer to a context data that will be passed to start routine.
+ *
+ * @param ContextRecord
+ *        Supplies a pointer to a context record which stores the initial state of the user mode thread.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+KThread::InitializeThreadContext(IN PKTHREAD Thread,
+                                 IN PKSYSTEM_ROUTINE SystemRoutine,
+                                 IN PKSTART_ROUTINE StartRoutine,
+                                 IN PVOID StartContext,
+                                 IN PCONTEXT ContextRecord)
+{
+    PKTHREAD_INIT_FRAME ThreadFrame;
+    PFX_SAVE_FORMAT FxSaveFormat;
+
+    /* Set initial thread frame */
+    ThreadFrame = (PKTHREAD_INIT_FRAME)((ULONG_PTR)Thread->InitialStack - sizeof(KTHREAD_INIT_FRAME));
+
+    /* Fill floating point save area with zeroes */
+    RtlZeroMemory(&ThreadFrame->NpxFrame, sizeof(FX_SAVE_AREA));
+
+    /* Check if context provided for this thread */
+    if(ContextRecord)
+    {
+        /* User mode thread needs further initialization, this is not completed */
+        UNIMPLEMENTED;
+
+        /* Fill trap frame with zeroes */
+        RtlZeroMemory(&ThreadFrame->TrapFrame, sizeof(KTRAP_FRAME));
+
+        /* Disable debug registers and enable context registers */
+        ContextRecord->ContextFlags &= ~CONTEXT_DEBUG_REGISTERS | CONTEXT_CONTROL;
+
+        /* This is user mode thread */
+        ThreadFrame->StartFrame.UserMode = TRUE;
+        Thread->PreviousMode = UserMode;
+
+        /* Disable coprocessor floating point state */
+        Thread->NpxState = NPX_STATE_UNLOADED;
+        Thread->Header.NpxIrql = PASSIVE_LEVEL;
+
+        /* Set initial floating point state */
+        FxSaveFormat = (PFX_SAVE_FORMAT)ContextRecord->ExtendedRegisters;
+        FxSaveFormat->ControlWord = 0x27F;
+        FxSaveFormat->MxCsr = 0x1F80;
+        ContextRecord->FloatSave.Cr0NpxState = 0;
+        ThreadFrame->NpxFrame.Cr0NpxState = 0;
+        ThreadFrame->NpxFrame.NpxSavedCpu = 0;
+
+        /* Clear DR6 and DR7 registers */
+        ThreadFrame->TrapFrame.Dr6 = 0;
+        ThreadFrame->TrapFrame.Dr7 = 0;
+
+        /* Set DS, ES and SS segments for user mode */
+        ThreadFrame->TrapFrame.SegDs |= RPL_MASK;
+        ThreadFrame->TrapFrame.SegEs |= RPL_MASK;
+        ThreadFrame->TrapFrame.SegSs |= RPL_MASK;
+
+        /* Set user mode thread in the trap frame */
+        ThreadFrame->TrapFrame.PreviousMode = UserMode;
+    }
+    else
+    {
+        /* This is kernel mode thread */
+        ThreadFrame->StartFrame.UserMode = FALSE;
+        Thread->PreviousMode = KernelMode;
+
+        /* Disable coprocessor floating point state */
+        Thread->NpxState = NPX_STATE_UNLOADED;
+
+        /* Set initial floating point state */
+        ThreadFrame->NpxFrame.FxArea.ControlWord = 0x27F;
+        ThreadFrame->NpxFrame.FxArea.MxCsr = 0x1F80;
+    }
+
+    /* Initialize thread startup information */
+    ThreadFrame->StartFrame.StartContext = StartContext;
+    ThreadFrame->StartFrame.StartRoutine = StartRoutine;
+    ThreadFrame->StartFrame.SystemRoutine = SystemRoutine;
+
+    /* Initialize switch frame */
+    ThreadFrame->SwitchFrame.ApcBypassDisabled = TRUE;
+    ThreadFrame->SwitchFrame.ExceptionList = (PEXCEPTION_REGISTRATION_RECORD) - 1;
+
+    /* Set thread stack */
+    Thread->KernelStack = &ThreadFrame->SwitchFrame;
+}
+
+} /* namespace */