do you have pdf or link to find that ??
thank's to all :) On Thu, Sep 16, 2010 at 8:11 PM, sanjeev sharma <[email protected] > wrote: > Linux Architecture or OS Book would be prefer... > > Sanjeev > > > > On Thu, Sep 16, 2010 at 6:37 PM, jhoni maux <[email protected]> wrote: > >> oh, thank's for all guys :) >> >> what is privilege ring of CPU (0 and 3) can you give a detil about that ?? >> >> may i know where is the place to find some guide or reference >> about user space and kernel space >> >> >> On Thu, Sep 16, 2010 at 6:32 PM, arshad hussain >> <[email protected]>wrote: >> >>> On 9/16/2010 11:56 AM, jhoni maux wrote: >>> >>>> HI, >>>> >>>> Now i'm learn kernel module programming, but i'm still confuse about >>>> user space context and kernel space context. >>>> >>> >>> Here I think 'user space context' and 'user space' implies >>> the same thing. >>> >>> >>> >>> anyone know about what >>> >>>> the different between user space and kernel space and how to see the >>>> underlaying between user space and kernel space ?? >>>> >>> >>> So... >>> >>> In 'Kernel space' the running program can access all the >>> CPU instruction set. While in user space the programs >>> has access to limited CPU instruction. This is accomplished >>> through setting proper privilege bits in the Segment selector >>> and Descriptors. For example 'user space' program cannot issue >>> cli instruction... >>> >>> CPU designers also call 'kernel space' as Ring0. while >>> 'user space' is known as Ring3. >>> >>> Thanks >>> >>> -- >>> To unsubscribe from this list: send an email with >>> "unsubscribe kernelnewbies" to [email protected] >>> Please read the FAQ at http://kernelnewbies.org/FAQ >>> >>> >> >
