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内核编程中 C的基本语法问题
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发表于:
2014-10-29 21:49
14397
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鄙人基础太差
学习内核时候 看前人的代码
(ULONG)pCurrentEprocess = (ULONG)pListActiveProcess->Flink;
(ULONG)pCurrentEprocess = (ULONG)pCurrentEprocess ->g_Offset_Eprocess_Flink;
其中上面两句编译错误
1>driver.cpp(453): error C2106: “=”: 左操作数必须为左值
1>driver.cpp(454): error C2106: “=”: 左操作数必须为左值
难道代码有问题？
NTSTATUS
LookupProcessByName(
IN PCHAR pcProcessName,
OUT PEPROCESS *pEprocess
)
{
NTSTATUS status;
ULONG uCurrentProcessId = 0;
ULONG uStartProcessId = 0;
ULONG uCount = 0;
ULONG uLength = 0;
PLIST_ENTRY pListActiveProcess;
PEPROCESS pCurrentEprocess = NULL;
if (!ARGUMENT_PRESENT(pcProcessName) || !ARGUMENT_PRESENT(pEprocess))
{
return STATUS_INVALID_PARAMETER;
}
uLength = strlen(pcProcessName);
pCurrentEprocess = g_pEprocess_System;
uStartProcessId = *((PULONG)((ULONG)pCurrentEprocess + g_Offset_Eprocess_ProcessId));
uCurrentProcessId = uStartProcessId;
while(1)
{
if(_strnicmp(pcProcessName, (PVOID)((ULONG)pCurrentEprocess + g_Offset_Eprocess_Name), uLength) == 0)
{
*pEprocess = pCurrentEprocess;
status = STATUS_SUCCESS;
break;
}
else if ((uCount >= 1) && (uStartProcessId == uCurrentProcessId))
{
*pEprocess = 0x00000000;
status = STATUS_NOT_FOUND;
break;
}
else
{
pListActiveProcess = (LIST_ENTRY *)((ULONG)pCurrentEprocess + g_Offset_Eprocess_Flink);
(ULONG)pCurrentEprocess = (ULONG)pListActiveProcess->Flink;
//这句左值错误
(ULONG)pCurrentEprocess = (ULONG)pCurrentEprocess - g_Offset_Eprocess_Flink; //这句左值错误
uCurrentProcessId = *(PULONG)((ULONG)pCurrentEprocess + g_Offset_Eprocess_ProcessId);
uCount++;
}
}
return status;
}
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