[BZ 16372] fixing tst-longjmp_chk2 on ia64

[Andreas Schwab]

Mike Frysinger <vapier@gentoo.org> writes:

> i was going through the outstanding ia64 test failures when i came across tst-
> longjmp_chk2.  that test is designed to make sure the longjmp fortify logic 
> handles signal stacks correctly which the current ia64 code does not.  to 
> implement this, you have to call sigaltstack from asm code, and my ia64 skills 
> are bad :).
>
> here's what i've got so far:
> #define CHECK_RSP(reg) \
>         /* First see if target stack is within current one.  */ \
>         cmp.ltu p0, p8 = reg, r12;                              \
> (p8)    br.cond.dpnt .Lok;;                                     \
>                                                                 \
>         /* Maybe it's an alternative signal stack.  */          \
>         adds r34 = -sizeSS, r12;                                \

How did you allocate the space for the stack_t?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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