diff options
Diffstat (limited to 'support/xsignal.h')
| -rw-r--r-- | support/xsignal.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/support/xsignal.h b/support/xsignal.h index f330888..d89e2bc 100644 --- a/support/xsignal.h +++ b/support/xsignal.h @@ -37,6 +37,23 @@ void xsigaction (int sig, const struct sigaction *newact, void xpthread_sigmask (int how, const sigset_t *set, sigset_t *oldset); +/* Allocate and activate an alternate signal stack. This stack will + have SIZE + MINSIGSTKSZ bytes of space, rounded up to a whole + number of pages. There will be large (at least 1 MiB) inaccessible + guard bands on either side of it. The return value is a cookie + that can be passed to xfree_sigstack to deactivate and deallocate + the stack again. It is not necessary to call sigaltstack after + calling this function. Terminates the process on error. */ +void *xalloc_sigstack (size_t size); + +/* Deactivate and deallocate a signal stack created by xalloc_sigstack. */ +void xfree_sigstack (void *stack); + +/* Extract the actual address and size of the alternate signal stack from + the cookie returned by xalloc_sigstack. */ +void xget_sigstack_location (const void *stack, unsigned char **addrp, + size_t *sizep); + __END_DECLS #endif /* SUPPORT_SIGNAL_H */ |