Source code of Windows XP (NT5)
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245 lines
3.7 KiB

/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
stubs.c
Abstract:
This module implements stub routines for the boot code.
Author:
David N. Cutler (davec) 7-Nov-1990
Environment:
Kernel mode only.
Revision History:
--*/
#define _BLDR_
#include "ntos.h"
//
// Define global data.
//
ULONG BlDcacheFillSize = 32;
VOID
KeBugCheck (
IN ULONG BugCheckCode
)
/*++
Routine Description:
This function crashes the system in a controlled manner.
Arguments:
BugCheckCode - Supplies the reason for the bug check.
Return Value:
None.
--*/
{
//
// Print out the bug check code and break.
//
DbgPrint("\n*** BugCheck (%lx) ***\n\n", BugCheckCode);
while(TRUE) {
DbgBreakPoint();
};
return;
}
LARGE_INTEGER
KeQueryPerformanceCounter (
OUT PLARGE_INTEGER Frequency OPTIONAL
)
/*++
Routine Description:
This routine is a stub for the kernel debugger and always returns a
value of zero.
Arguments:
Frequency - Supplies an optional pointer to a variable which receives
the performance counter frequency in Hertz.
Return Value:
A value of zero is returned.
--*/
{
LARGE_INTEGER Counter;
//
// Return the current system time as the function value.
//
Counter.LowPart = 0;
Counter.HighPart = 0;
return Counter;
}
VOID
KeStallExecutionProcessor (
IN ULONG MicroSeconds
)
/*++
Routine Description:
This function stalls execution for the specified number of microseconds.
Arguments:
MicroSeconds - Supplies the number of microseconds that execution is to be
stalled.
Return Value:
None.
--*/
{
ULONG Index;
ULONG Limit;
PULONG Store;
ULONG Value;
//
// ****** begin temporary code ******
//
// This code must be replaced with a smarter version. For now it assumes
// an execution rate of 40,000,000 instructions per second and 4 instructions
// per iteration.
//
Store = &Value;
Limit = (MicroSeconds * 40 / 4);
for (Index = 0; Index < Limit; Index += 1) {
*Store = Index;
}
return;
}
PVOID
MmDbgReadCheck (
IN PVOID VirtualAddress
)
/*++
Routine Description:
This routine returns the phyiscal address for a virtual address
which is valid (mapped) for read access.
Arguments:
VirtualAddress - Supplies the virtual address to check.
Return Value:
Returns NULL if the address is not valid or readable, otherwise
returns the physical address of the corresponding virtual address.
--*/
{
return VirtualAddress;
}
PVOID
MmDbgTranslatePhysicalAddress (
IN PHYSICAL_ADDRESS PhysicalAddress
)
/*++
Routine Description:
This routine returns the phyiscal address for a physical address
which is valid (mapped).
Arguments:
PhysicalAddress - Supplies the physical address to check.
Return Value:
Returns NULL if the address is not valid or readable, otherwise
returns the physical address of the corresponding virtual address.
--*/
{
return (PVOID)PhysicalAddress.LowPart;
}
PVOID
MmDbgWriteCheck (
IN PVOID VirtualAddress
)
/*++
Routine Description:
This routine returns the phyiscal address for a virtual address
which is valid (mapped) for write access.
Arguments:
VirtualAddress - Supplies the virtual address to check.
Return Value:
Returns NULL if the address is not valid or readable, otherwise
returns the physical address of the corresponding virtual address.
--*/
{
return VirtualAddress;
}
VOID
RtlAssert(
IN PVOID FailedAssertion,
IN PVOID FileName,
IN ULONG LineNumber,
IN PCHAR Message OPTIONAL
)
{
DbgPrint( "\n*** Assertion failed\n");
while (TRUE) {
DbgBreakPoint();
}
}