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Initialize thread context for AMD64
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This commit is contained in:
Rafal Kupiec 2023-03-14 17:37:20 +01:00
parent 8f653c47dc
commit 5677719038
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
3 changed files with 109 additions and 1 deletions
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29
sdk/xtdk/amd64/ketypes.h
View File

@ -88,6 +88,14 @@
#define EFLAGS_ID_MASK 0x00200000L
#define EFLAGS_USER_SANITIZE 0x003F4DD7L
/* Context control flags */
#define CONTEXT_ARCHITECTURE 0x00100000
#define CONTEXT_CONTROL (CONTEXT_ARCHITECTURE | 0x01)
#define CONTEXT_INTEGER (CONTEXT_ARCHITECTURE | 0x02)
#define CONTEXT_SEGMENTS (CONTEXT_ARCHITECTURE | 0x04)
#define CONTEXT_FLOATING_POINT (CONTEXT_ARCHITECTURE | 0x08)
#define CONTEXT_DEBUG_REGISTERS (CONTEXT_ARCHITECTURE | 0x10)
/* Interrupt request levels definitions */
#define PASSIVE_LEVEL 0
#define LOW_LEVEL 0
@ -321,6 +329,17 @@ typedef struct _KEXCEPTION_FRAME
ULONG64 Return;
} KEXCEPTION_FRAME, *PKEXCEPTION_FRAME;
/* Thread start frame definition */
typedef struct _KSTART_FRAME
{
ULONG64 P1Home;
ULONG64 P2Home;
ULONG64 P3Home;
ULONG64 P4Home;
ULONG64 Reserved;
ULONG64 Return;
} KSTART_FRAME, *PKSTART_FRAME;
/* Switch frame definition */
typedef struct _KSWITCH_FRAME
{
@ -422,6 +441,16 @@ typedef struct _KTRAP_FRAME
ULONG CodePatchCycle;
} KTRAP_FRAME, *PKTRAP_FRAME;
/* Thread initialization frame definition */
typedef struct _KTHREAD_INIT_FRAME
{
KSWITCH_FRAME SwitchFrame;
KSTART_FRAME StartFrame;
KEXCEPTION_FRAME ExceptionFrame;
KTRAP_FRAME TrapFrame;
FLOATING_SAVE_AREA NpxFrame;
} KTHREAD_INIT_FRAME, *PKTHREAD_INIT_FRAME;
/* Special kernel registers structure definition */
typedef struct _KSPECIAL_REGISTERS
{

1
sdk/xtdk/ketypes.h
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@ -388,6 +388,7 @@ typedef struct _KTHREAD
SINGLE_LIST_ENTRY SwapListEntry;
};
PKQUEUE Queue;
CHAR PreviousMode;
SHORT SpecialApcDisable;
PTHREAD_ENVIRONMENT_BLOCK EnvironmentBlock;
union

80
xtoskrnl/ke/amd64/kthread.c
View File

@ -39,5 +39,83 @@ KepInitializeThreadContext(IN PKTHREAD Thread,
IN PVOID StartContext,
IN PCONTEXT ContextRecord)
{
UNIMPLEMENTED;
PKTHREAD_INIT_FRAME ThreadFrame;
/* Set initial thread frame */
ThreadFrame = (PKTHREAD_INIT_FRAME)Thread->InitialStack - sizeof(KTHREAD_INIT_FRAME);
/* Fill floating point save area with zeroes */
RtlZeroMemory(&ThreadFrame->NpxFrame, sizeof(FLOATING_SAVE_AREA));
/* Check if context provided for this thread */
if(ContextRecord)
{
/* 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 = 1;
/* Set initial floating point state */
ThreadFrame->NpxFrame.ControlWord = 0x27F;
ThreadFrame->NpxFrame.StatusWord = 0;
ThreadFrame->NpxFrame.TagWord = 0xFFFF;
ThreadFrame->NpxFrame.ErrorOffset = 0;
ThreadFrame->NpxFrame.ErrorSelector = 0;
ThreadFrame->NpxFrame.ErrorOpcode = 0;
ThreadFrame->NpxFrame.DataOffset = 0;
ThreadFrame->NpxFrame.DataSelector = 0;
/* 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 = 0;
/* Set thread startup frame return information */
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.Rbp = (ULONG64)&ThreadFrame->TrapFrame + 128;
ThreadFrame->SwitchFrame.MxCsr = INITIAL_MXCSR;
/* Set thread stack */
Thread->InitialStack = &ThreadFrame->NpxFrame;
Thread->KernelStack = &ThreadFrame->SwitchFrame;
}