+++ /dev/null
-/*
- * PROJECT: ReactOS Kernel
- * LICENSE: BSD - See COPYING.ARM in the top level directory
- * FILE: ntoskrnl/ke/arm/usercall.c
- * PURPOSE: Implements system calls and user-mode callbacks for ARM
- * PROGRAMMERS: ReactOS Portable Systems Group
- */
-
-/* INCLUDES *******************************************************************/
-
-#include <ntoskrnl.h>
-#define NDEBUG
-#include <debug.h>
-
-/* GLOBALS ********************************************************************/
-
-//
-// System call wrapper generator
-//
-#define BUILD_SYSCALLS \
-SYSCALL(00, ()) \
-SYSCALL(01, (_1)) \
-SYSCALL(02, (_1, _2)) \
-SYSCALL(03, (_1, _2, _3)) \
-SYSCALL(04, (_1, _2, _3, _4 )) \
-SYSCALL(05, (_1, _2, _3, _4, _5)) \
-SYSCALL(06, (_1, _2, _3, _4, _5, _6)) \
-SYSCALL(07, (_1, _2, _3, _4, _5, _6, _7)) \
-SYSCALL(08, (_1, _2, _3, _4, _5, _6, _7, _8)) \
-SYSCALL(09, (_1, _2, _3, _4, _5, _6, _7, _8, _9)) \
-SYSCALL(0A, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a)) \
-SYSCALL(0B, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b)) \
-SYSCALL(0C, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c)) \
-SYSCALL(0D, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c, d)) \
-SYSCALL(0E, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c, d, e)) \
-SYSCALL(0F, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c, d, e, f)) \
-SYSCALL(10, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c, d, e, f, _10)) \
-SYSCALL(11, (_1, _2, _3, _4, _5, _6, _7, _8, _9, a, b, c, d, e, f, _10, _11))
-
-//
-// Generate function pointer definitions
-//
-#define PROTO
-#include "ke_i.h"
-BUILD_SYSCALLS
-
-//
-// Generate function code
-//
-#define FUNC
-#include "ke_i.h"
-BUILD_SYSCALLS
-
-/* SYSTEM CALL STUBS **********************************************************/
-
-typedef NTSTATUS (*PKI_SYSCALL_PARAM_HANDLER)(IN PVOID p, IN PVOID *g);
-PKI_SYSCALL_PARAM_HANDLER KiSyscallHandlers[0x12] =
-{
- KiSyscall00Param,
- KiSyscall01Param,
- KiSyscall02Param,
- KiSyscall03Param,
- KiSyscall04Param,
- KiSyscall05Param,
- KiSyscall06Param,
- KiSyscall07Param,
- KiSyscall08Param,
- KiSyscall09Param,
- KiSyscall0AParam,
- KiSyscall0BParam,
- KiSyscall0CParam,
- KiSyscall0DParam,
- KiSyscall0EParam,
- KiSyscall0FParam,
- KiSyscall10Param,
- KiSyscall11Param,
-};
-
-/* FUNCIONS *******************************************************************/
-
-VOID
-KiSystemService(IN PKTHREAD Thread,
- IN PKTRAP_FRAME TrapFrame,
- IN ULONG Instruction)
-{
- ULONG Id, Number, ArgumentCount, i;
- PKPCR Pcr;
- ULONG_PTR ServiceTable, Offset;
- PKSERVICE_TABLE_DESCRIPTOR DescriptorTable;
- PVOID SystemCall;
- PVOID* Argument;
- PVOID Arguments[0x11]; // Maximum 17 arguments
- KIRQL OldIrql;
- ASSERT(TrapFrame->Reserved == 0xBADB0D00);
-
- //
- // Increase count of system calls
- //
- Pcr = KeGetPcr();
- Pcr->CurrentPrcb->KeSystemCalls++;
-
- //
- // Get the system call ID
- //
- Id = Instruction & 0xFFFFF;
- //DPRINT1("[SWI] (%x) %p (%d) \n", Id, Thread, Thread->PreviousMode);
-
- //
- // Get the descriptor table
- //
- ServiceTable = (ULONG_PTR)Thread->ServiceTable;
- Offset = ((Id >> SERVICE_TABLE_SHIFT) & SERVICE_TABLE_MASK);
- ServiceTable += Offset;
- DescriptorTable = (PVOID)ServiceTable;
-
- //
- // Get the service call number and validate it
- //
- Number = Id & SERVICE_NUMBER_MASK;
- if (Number > DescriptorTable->Limit)
- {
- //
- // Check if this is a GUI call
- //
- UNIMPLEMENTED;
- ASSERT(FALSE);
- }
-
- //
- // Save the function responsible for handling this system call
- //
- SystemCall = (PVOID)DescriptorTable->Base[Number];
-
- //
- // Check if this is a GUI call
- //
- if (Offset & SERVICE_TABLE_TEST)
- {
- //
- // TODO
- //
- UNIMPLEMENTED;
- ASSERT(FALSE);
- }
-
- //
- // Check how many arguments this system call takes
- //
- ArgumentCount = DescriptorTable->Number[Number] / 4;
- ASSERT(ArgumentCount <= 17);
-
- //
- // Copy the register-arguments first
- // First four arguments are in a1, a2, a3, a4
- //
- Argument = (PVOID*)&TrapFrame->R0;
- for (i = 0; (i < ArgumentCount) && (i < 4); i++)
- {
- //
- // Copy them into the kernel stack
- //
- Arguments[i] = *Argument;
- Argument++;
- }
-
- //
- // If more than four, we'll have some on the user stack
- //
- if (ArgumentCount > 4)
- {
- //
- // Check where the stack is
- //
- if (Thread->PreviousMode == UserMode)
- {
- //
- // FIXME-USER: Validate the user stack
- //
- ASSERT(FALSE);
- Argument = (PVOID*)TrapFrame->Sp;
- }
- else
- {
- //
- // We were called from the kernel
- //
- Argument = (PVOID*)(TrapFrame + 1);
- }
-
- //
- // Copy the rest
- //
- for (i = 4; i < ArgumentCount; i++)
- {
- //
- // Copy into kernel stack
- //
- Arguments[i] = *Argument;
- Argument++;
- }
- }
-
- //
- // We can safely enable interrupts here
- //
- _enable();
-
- //
- // Do the system call and save result in EAX
- //
- TrapFrame->R0 = KiSyscallHandlers[ArgumentCount]((PVOID)SystemCall,
- (PVOID)Arguments);
-
- //
- // Check if this was a user call
- //
- if (KiGetPreviousMode(TrapFrame) == UserMode)
- {
- //
- // Make sure we didn't return at elevated IRQL
- //
- OldIrql = KeGetCurrentIrql();
- if (OldIrql != PASSIVE_LEVEL)
- {
- //
- // Forcibly put us in a sane state
- //
- KeGetPcr()->CurrentIrql = 0;
- _disable();
-
- //
- // Fail
- //
- KeBugCheckEx(IRQL_GT_ZERO_AT_SYSTEM_SERVICE,
- (ULONG_PTR)SystemCall,
- OldIrql,
- 0,
- 0);
- }
-
- //
- // Make sure we're not attached and that APCs are not disabled
- //
- if ((KeGetCurrentThread()->ApcStateIndex != CurrentApcEnvironment) ||
- (KeGetCurrentThread()->CombinedApcDisable != 0))
- {
- //
- // Fail
- //
- KeBugCheckEx(APC_INDEX_MISMATCH,
- (ULONG_PTR)SystemCall,
- KeGetCurrentThread()->ApcStateIndex,
- KeGetCurrentThread()->CombinedApcDisable,
- 0);
- }
- }
-
- //
- // Restore the old trap frame
- //
- Thread->TrapFrame = KiGetLinkedTrapFrame(TrapFrame);
-}
-
-VOID
-NTAPI
-KiInitializeUserApc(IN PKEXCEPTION_FRAME ExceptionFrame,
- IN PKTRAP_FRAME TrapFrame,
- IN PKNORMAL_ROUTINE NormalRoutine,
- IN PVOID NormalContext,
- IN PVOID SystemArgument1,
- IN PVOID SystemArgument2)
-{
- CONTEXT Context;
- ULONG_PTR Stack;
- ULONG ContextLength;
- DPRINT1("User APC: %p %p %p\n", NormalContext, SystemArgument1, SystemArgument2);
-
- //
- // Build the user mode context
- //
- Context.ContextFlags = CONTEXT_FULL;
- KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context);
-
- //
- // Setup the context on the user stack
- //
- ContextLength = sizeof(CONTEXT);
- Stack = (ULONG_PTR)(Context.Sp & ~7) - ContextLength;
-
- //
- // Make sure the stack is valid, and copy the context
- //
- ProbeForWrite((PVOID)Stack, ContextLength, sizeof(QUAD));
- RtlMoveMemory((PVOID)Stack, &Context, sizeof(CONTEXT));
-
- //
- // Setup the trap frame when we return to user mode
- //
- TrapFrame->R0 = (ULONG)NormalContext;
- TrapFrame->R1 = (ULONG)SystemArgument1;
- TrapFrame->R2 = (ULONG)SystemArgument2;
- TrapFrame->R3 = (ULONG)NormalRoutine;
- TrapFrame->Sp = Stack;
- TrapFrame->Lr = (ULONG)KeUserApcDispatcher;
-}
-
-NTSTATUS
-NTAPI
-KeUserModeCallback(IN ULONG RoutineIndex,
- IN PVOID Argument,
- IN ULONG ArgumentLength,
- OUT PVOID *Result,
- OUT PULONG ResultLength)
-{
- ASSERT(FALSE);
- return STATUS_NOT_IMPLEMENTED;
-}
-
-NTSTATUS
-NTAPI
-KiCallUserMode(
- IN PVOID *OutputBuffer,
- IN PULONG OutputLength)
-{
- ASSERT(FALSE);
- return STATUS_NOT_IMPLEMENTED;
-}
-
-NTSTATUS
-NTAPI
-NtCallbackReturn(
- _In_ PVOID Result,
- _In_ ULONG ResultLength,
- _In_ NTSTATUS CallbackStatus)
-{
- ASSERT(FALSE);
- return STATUS_NOT_IMPLEMENTED;
-}
-
projects / reactos.git / blobdiff