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/* vi: set sw=4 ts=4: */
/*
* sigaction() for Xtensa uClibc
*
* Copyright (C) 2007, 2008 Tensilica Inc.
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <errno.h>
#include <signal.h>
#include <sys/syscall.h>
#include <string.h>
#include <bits/kernel_sigaction.h>
#define SA_RESTORER 0x04000000
extern void __default_sa_restorer (void);
/* Experimentally off - libc_hidden_proto(memcpy) */
int __libc_sigaction (int signum, const struct sigaction *act,
struct sigaction *oact)
{
struct kernel_sigaction kact, koact;
int result;
enum {
SIGSET_MIN_SIZE = sizeof(kact.sa_mask) < sizeof(act->sa_mask)
? sizeof(kact.sa_mask) : sizeof(act->sa_mask)
};
if (act) {
kact.k_sa_handler = act->sa_handler;
memcpy(&kact.sa_mask, &act->sa_mask, SIGSET_MIN_SIZE);
kact.sa_flags = act->sa_flags;
if (kact.sa_flags & SA_RESTORER) {
kact.sa_restorer = act->sa_restorer;
} else {
kact.sa_restorer = __default_sa_restorer;
kact.sa_flags |= SA_RESTORER;
}
}
/* NB: kernel (as of 2.6.25) will return EINVAL
* if sizeof(kact.sa_mask) does not match kernel's sizeof(sigset_t) */
result = __syscall_rt_sigaction(signum,
act ? __ptrvalue (&kact) : NULL,
oact ? __ptrvalue (&koact) : NULL,
sizeof(kact.sa_mask));
if (oact && result >= 0) {
oact->sa_handler = koact.k_sa_handler;
memcpy(&oact->sa_mask, &koact.sa_mask, SIGSET_MIN_SIZE);
oact->sa_flags = koact.sa_flags;
oact->sa_restorer = koact.sa_restorer;
}
return result;
}
#ifndef LIBC_SIGACTION
libc_hidden_proto (sigaction)
weak_alias (__libc_sigaction, sigaction)
libc_hidden_weak (sigaction)
#endif
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