stack pointer

stack pointer

[Nitin Varyani]

struct task_struct { volatile long state; /* -1 unrunnable, 0 runnable, >0
stopped */* void *stack;* atomic_t usage; unsigned int flags; /* per
process flags, defined below */ unsigned int ptrace;


What does the field void *stack indicate here?
Is it the pointer to kernel stack of the process?

Where is the stack pointer for the current process stored in linux?
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stack pointer

[Valdis.Kletnieks at vt.edu]

On Mon, 07 Mar 2016 13:07:14 +0530, Nitin Varyani said:

> Where is the stack pointer for the current process stored in linux?

In the stack pointer register, of course. (And if the code was compiled
with -fomit-stack-pointer there isn't even one. :)

The fun and games starts when you talk about the stack for a process that
*isn't* currently active on a CPU....
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