and more generally because you are in process level and that there is a
mechanism called memory protection which means that each process can only
use it's particular memory space....
However, there is a solution: /dev/kmem which is an image of the whole
memory, read and write access. You obsiously need to be root to access is.
You can use open/lseek/read/write to play with it.
Cheers,
JeF
On Fri, 18 Jan 2002, Matthew Dalton wrote:
> > henry wrote:
> >
> > Dears:
> >
> > 1. Any tool to dump memory under linux ?
>
> gdb?
>
>
> > 2. Why cant I link lib for readl() ?
> > #include <asm/io.h>
> > int main()
> > {
> > return readl(0x40010000) ;
> > }
>
> readl() is a macro defined in asm/io.h
>
> Your program can't find it because it's defined within a #ifdef
> __KERNEL__ / #endif construct, and your code isn't part of the kernel.
>
>
> Matthew
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