> Livia Catarina Soares wrote:
> > 1- Where is the kernel stack ??
> > Is it above the address "0xC0000000" in the kernel memory ??
>
> There is one kernel stack for every user process, and it is mapped in
> kernel memory (above PAGE_OFFSET). Note that even in an interrupt
> context, the kernel stack of whatever user process was running is used.
> ^^^^^^^^^^^^
The kernel stack is a kernel stack. It is not associated with a
user process. If this was not true, a user could crash the system.
#include <stdio.h>
int main()
{
__asm__(
"nop \n \
movl $0,%esp \n"
);
for(;;)
;
}
All interrupts are handled on the kernel stack.
Cheers,
Dick Johnson
***** FILE SYSTEM WAS MODIFIED *****
Penguin : Linux version 2.2.5 on an i686 machine (400.59 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
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