119 lines
4.0 KiB
C
119 lines
4.0 KiB
C
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/ke/amd64/kthread.c
|
|
* DESCRIPTION: AMD64 thread manipulation support
|
|
* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
|
|
*/
|
|
|
|
#include <xtos.h>
|
|
|
|
|
|
/**
|
|
* 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
|
|
KepInitializeThreadContext(IN PKTHREAD Thread,
|
|
IN PKSYSTEM_ROUTINE SystemRoutine,
|
|
IN PKSTART_ROUTINE StartRoutine,
|
|
IN PVOID StartContext,
|
|
IN PCONTEXT ContextRecord)
|
|
{
|
|
PKTHREAD_INIT_FRAME ThreadFrame;
|
|
|
|
/* Set initial thread frame */
|
|
ThreadFrame = ((PKTHREAD_INIT_FRAME)Thread->InitialStack) - 1;
|
|
|
|
/* Fill floating point save area with zeroes */
|
|
RtlZeroMemory(&ThreadFrame->NpxFrame, sizeof(FLOATING_SAVE_AREA));
|
|
|
|
/* Check if context provided for this thread */
|
|
if(ContextRecord)
|
|
{
|
|
/* User mode thread needs further initialization, this is not completed */
|
|
UNIMPLEMENTED;
|
|
|
|
/* Fill exception and trap frames with zeroes */
|
|
RtlZeroMemory(&ThreadFrame->ExceptionFrame, sizeof(KEXCEPTION_FRAME));
|
|
RtlZeroMemory(&ThreadFrame->TrapFrame, sizeof(KTRAP_FRAME));
|
|
|
|
/* Disable debug registers and enable context registers */
|
|
ContextRecord->ContextFlags &= ~CONTEXT_DEBUG_REGISTERS | CONTEXT_CONTROL;
|
|
|
|
/* Align the stack and reserve space for 4 parameters and return value */
|
|
ContextRecord->Rsp = (ContextRecord->Rsp & ~15) - 40;
|
|
|
|
/* Set CS and SS segments for user mode */
|
|
ContextRecord->SegCs = KGDT_R3_CODE | RPL_MASK;
|
|
ContextRecord->SegSs = KGDT_R3_DATA | RPL_MASK;
|
|
|
|
/* This is user mode thread */
|
|
Thread->PreviousMode = UserMode;
|
|
|
|
/* Enable floating point state */
|
|
Thread->NpxState = NPX_STATE_SCRUB;
|
|
|
|
/* Set initial floating point state */
|
|
ThreadFrame->NpxFrame.ControlWord = 0x27F;
|
|
ThreadFrame->NpxFrame.TagWord = 0xFFFF;
|
|
|
|
/* Clear DR6 and DR7 registers */
|
|
ThreadFrame->TrapFrame.Dr6 = 0;
|
|
ThreadFrame->TrapFrame.Dr7 = 0;
|
|
|
|
/* Set initial MXCSR register value */
|
|
ThreadFrame->TrapFrame.MxCsr = INITIAL_MXCSR;
|
|
|
|
/* Initialize exception frame */
|
|
ThreadFrame->ExceptionFrame.P1Home = (ULONG64)StartContext;
|
|
ThreadFrame->ExceptionFrame.P2Home = (ULONG64)StartRoutine;
|
|
ThreadFrame->ExceptionFrame.P3Home = (ULONG64)SystemRoutine;
|
|
ThreadFrame->ExceptionFrame.P4Home = (ULONG64)SystemRoutine;
|
|
}
|
|
else
|
|
{
|
|
/* This is kernel mode thread */
|
|
Thread->PreviousMode = KernelMode;
|
|
|
|
/* Disable floating point state */
|
|
Thread->NpxState = NPX_STATE_UNUSED;
|
|
|
|
/* Set thread start address */
|
|
ThreadFrame->StartFrame.Return = (ULONG64)NULL;
|
|
}
|
|
|
|
/* Initialize thread startup information */
|
|
ThreadFrame->StartFrame.P1Home = (ULONG64)StartContext;
|
|
ThreadFrame->StartFrame.P2Home = (ULONG64)StartRoutine;
|
|
ThreadFrame->StartFrame.P3Home = (ULONG64)SystemRoutine;
|
|
ThreadFrame->StartFrame.P4Home = (ULONG64)SystemRoutine;
|
|
|
|
/* Initialize switch frame */
|
|
ThreadFrame->SwitchFrame.ApcBypass = APC_LEVEL;
|
|
ThreadFrame->SwitchFrame.MxCsr = INITIAL_MXCSR;
|
|
ThreadFrame->SwitchFrame.Rbp = (ULONG64)&ThreadFrame->TrapFrame;
|
|
|
|
/* Set thread stack */
|
|
Thread->KernelStack = &ThreadFrame->SwitchFrame;
|
|
}
|