On Jun 23, 2011, at 8:29 PM, Harold Hallikainen wrote:

> Is it possible to read the current stack pointer in C?
> If so, what would the instruction be?

Exactly or approximately?

void *returnsp()
{
   int a;
   return &a;
}

Should be pretty close (on almost any processor that uses stack frames =20
for local variables.)

Otherwise you get to look at inline assembler and/or assembler =20
subroutines.

Don't forget that the MIPS architecture doesn't have an explicit stack =20
(PUSH, POP, CALL, RETURN instructions) (too CISCy, I guess.)  So =20
you're at the mercy of everyone following the same subroutine linkage =20
and local variable conventions.

BillW

--=20
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