buffer problem

NTDEV
1

I have a global buffer defined as

#define SIZEB 3000000
PCHAR buffer;

in driver entry i allocate and initialize the buffer as

buffer=ExAllocatePool( NonPagedPoolCacheAligned ,SIZEB);
RtlFillBytes(buffer,SIZEB,‘1’);

In another function that is called in some dispatcher, I write

if(buffer[OFFSET]==‘2’){
KdPrint((“\n 2 buffer[%u] is : %c”,OFFSET,buff[OFFSET]));
}
else if(buffer[OFFSET]==‘1’){
KdPrint((“\n 1 buffer[%u] is : %c”,OFFSET,buff[OFFSET]));
}

I cannot get the reason why in the debugger I never see the contents
of the location OFFSET!!!

any help

2

One possibility is that OFFSET is not in the range 0 … SIZEB-1

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Albert Pinto
Sent: 09 August 2005 17:26
To: Windows System Software Devs Interest List
Subject: [ntdev] buffer problem

I have a global buffer defined as

#define SIZEB 3000000
PCHAR buffer;

in driver entry i allocate and initialize the buffer as

buffer=ExAllocatePool( NonPagedPoolCacheAligned ,SIZEB);
RtlFillBytes(buffer,SIZEB,‘1’);

In another function that is called in some dispatcher, I write

if(buffer[OFFSET]==‘2’){
KdPrint((“\n 2 buffer[%u] is : %c”,OFFSET,buff[OFFSET]));
}
else if(buffer[OFFSET]==‘1’){
KdPrint((“\n 1 buffer[%u] is : %c”,OFFSET,buff[OFFSET]));
}

I cannot get the reason why in the debugger I never see the
contents of the location OFFSET!!!

any help

Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256

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