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-rw-r--r--libc/signal/sigaction.c19
-rw-r--r--libc/sysdeps/linux/arm/sigaction.c53
-rw-r--r--libc/sysdeps/linux/avr32/sigaction.c18
-rw-r--r--libc/sysdeps/linux/common/bits/kernel_sigaction.h11
-rw-r--r--libc/sysdeps/linux/common/bits/sigset.h31
-rw-r--r--libc/sysdeps/linux/i386/sigaction.c62
-rw-r--r--libc/sysdeps/linux/mips/bits/signum.h2
-rw-r--r--libc/sysdeps/linux/mips/sigaction.c52
-rw-r--r--libc/sysdeps/linux/x86_64/sigaction.c20
-rw-r--r--libc/sysdeps/linux/xtensa/sigaction.c29
10 files changed, 179 insertions, 118 deletions
diff --git a/libc/signal/sigaction.c b/libc/signal/sigaction.c
index 221951eeb..f430070e6 100644
--- a/libc/signal/sigaction.c
+++ b/libc/signal/sigaction.c
@@ -43,25 +43,32 @@ __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct kernel_sigaction kact, koact;
+ enum {
+ /* We try hard to actually have them equal,
+ * but just for paranoid reasons, be safe */
+ 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, sizeof (sigset_t));
+ memcpy (&kact.sa_mask, &act->sa_mask, SIGSET_MIN_SIZE);
kact.sa_flags = act->sa_flags;
# ifdef HAVE_SA_RESTORER
kact.sa_restorer = act->sa_restorer;
# endif
}
- /* XXX The size argument hopefully will have to be changed to the
- real size of the user-level sigset_t. */
+ /* 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(sig,
- act ? __ptrvalue (&kact) : NULL,
- oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
+ 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, sizeof (sigset_t));
+ memcpy (&oact->sa_mask, &koact.sa_mask, SIGSET_MIN_SIZE);
oact->sa_flags = koact.sa_flags;
# ifdef HAVE_SA_RESTORER
oact->sa_restorer = koact.sa_restorer;
diff --git a/libc/sysdeps/linux/arm/sigaction.c b/libc/sysdeps/linux/arm/sigaction.c
index 9c1160866..e3c19eba3 100644
--- a/libc/sysdeps/linux/arm/sigaction.c
+++ b/libc/sysdeps/linux/arm/sigaction.c
@@ -51,34 +51,41 @@ int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oa
{
int result;
struct kernel_sigaction kact, koact;
-
- if (act) {
- kact.k_sa_handler = act->sa_handler;
- memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
- kact.sa_flags = act->sa_flags;
+ 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;
# ifdef HAVE_SA_RESTORER
- if (kact.sa_flags & SA_RESTORER) {
- kact.sa_restorer = act->sa_restorer;
- } else {
- kact.sa_restorer = choose_restorer (kact.sa_flags);
- kact.sa_flags |= SA_RESTORER;
- }
+ if (kact.sa_flags & SA_RESTORER) {
+ kact.sa_restorer = act->sa_restorer;
+ } else {
+ kact.sa_restorer = choose_restorer (kact.sa_flags);
+ kact.sa_flags |= SA_RESTORER;
+ }
# endif
- }
+ }
- /* XXX The size argument hopefully will have to be changed to the
- real size of the user-level sigset_t. */
- result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
- oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
- if (oact && result >= 0) {
- oact->sa_handler = koact.k_sa_handler;
- memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
- oact->sa_flags = koact.sa_flags;
+ /* 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(sig,
+ 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;
# ifdef HAVE_SA_RESTORER
- oact->sa_restorer = koact.sa_restorer;
+ oact->sa_restorer = koact.sa_restorer;
# endif
- }
- return result;
+ }
+ return result;
}
diff --git a/libc/sysdeps/linux/avr32/sigaction.c b/libc/sysdeps/linux/avr32/sigaction.c
index 05caec7ee..45d0abb5a 100644
--- a/libc/sysdeps/linux/avr32/sigaction.c
+++ b/libc/sysdeps/linux/avr32/sigaction.c
@@ -27,10 +27,14 @@ int __libc_sigaction(int signum, const struct sigaction *act,
{
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, sizeof (kact.sa_mask));
+ 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;
@@ -39,14 +43,16 @@ int __libc_sigaction(int signum, const struct sigaction *act,
kact.sa_flags |= SA_RESTORER;
}
- result = __syscall_rt_sigaction(signum, act ? __ptrvalue(&kact) : NULL,
- oldact ? __ptrvalue(&koact) : NULL,
- _NSIG / 8);
+ /* 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,
+ oldact ? __ptrvalue(&koact) : NULL,
+ sizeof(kact.sa_mask));
if (oldact && result >= 0) {
oldact->sa_handler = koact.k_sa_handler;
- memcpy(&oldact->sa_mask, &koact.sa_mask,
- sizeof(oldact->sa_mask));
+ memcpy(&oldact->sa_mask, &koact.sa_mask, SIGSET_MIN_SIZE);
oldact->sa_flags = koact.sa_flags;
oldact->sa_restorer = koact.sa_restorer;
}
diff --git a/libc/sysdeps/linux/common/bits/kernel_sigaction.h b/libc/sysdeps/linux/common/bits/kernel_sigaction.h
index 99148e608..89aa2bb88 100644
--- a/libc/sysdeps/linux/common/bits/kernel_sigaction.h
+++ b/libc/sysdeps/linux/common/bits/kernel_sigaction.h
@@ -7,6 +7,10 @@
#undef NO_OLD_SIGACTION
#if defined(__mips__)
+/* We have libc/sysdeps/linux/mips/bits/kernel_sigaction.h,
+ * so this should never be used. Lets see whether it is true. */
+struct BUG_is_here { char BUG_is_here[-1]; };
+
#undef HAVE_SA_RESTORER
/* This is the sigaction structure from the Linux 2.1.24 kernel. */
#include <sgidefs.h>
@@ -18,11 +22,9 @@ struct old_kernel_sigaction {
#define _KERNEL_NSIG 128
#define _KERNEL_NSIG_BPW 32
#define _KERNEL_NSIG_WORDS (_KERNEL_NSIG / _KERNEL_NSIG_BPW)
-
typedef struct {
unsigned long sig[_KERNEL_NSIG_WORDS];
} kernel_sigset_t;
-
/* This is the sigaction structure from the Linux 2.1.68 kernel. */
struct kernel_sigaction {
unsigned int sa_flags;
@@ -31,7 +33,9 @@ struct kernel_sigaction {
void (*sa_restorer)(void);
int s_resv[1]; /* reserved */
};
+
#elif defined(__ia64__)
+
#define NO_OLD_SIGACTION
#undef HAVE_SA_RESTORER
struct kernel_sigaction {
@@ -39,7 +43,9 @@ struct kernel_sigaction {
unsigned long sa_flags;
sigset_t sa_mask;
};
+
#else
+
#define HAVE_SA_RESTORER
/* This is the sigaction structure from the Linux 2.1.20 kernel. */
struct old_kernel_sigaction {
@@ -55,6 +61,7 @@ struct kernel_sigaction {
void (*sa_restorer) (void);
sigset_t sa_mask;
};
+
#endif
#ifndef NO_OLD_SIGACTION
diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h
index 964b09178..7ec87eb1d 100644
--- a/libc/sysdeps/linux/common/bits/sigset.h
+++ b/libc/sysdeps/linux/common/bits/sigset.h
@@ -23,15 +23,24 @@
typedef int __sig_atomic_t;
/* A 'sigset_t' has a bit for each signal.
- * Signal 0 does not exist, so we have signals 1..64.
- * glibc has space for 1024 signals (!), but all arches supported
- * by Linux have 64 signals only.
- * See, for example, _NSIG (defined to 65) in signum.h
+ * glibc has space for 1024 signals (!), but most arches supported
+ * by Linux have 64 signals, and only MIPS has 128.
+ * There seems to be some historical baggage in sparc[64]
+ * where they might have (or had in the past) 32 signals only,
+ * I hope it's irrelevant now.
+ * Signal 0 does not exist, so we have signals 1..64, not 0..63.
+ * Note that struct sigaction has embedded sigset_t,
+ * and this necessitates translation in sigaction()
+ * to convert it to struct kernel_sigaction.
+ * See libc/.../sigaction.c, libc/.../kernel_sigaction.h
*/
-
-# define _SIGSET_NWORDS (64 / (8 * sizeof (unsigned long int)))
+#if defined(__mips__)
+# define _SIGSET_NWORDS (128 / (8 * sizeof (unsigned long)))
+#else
+# define _SIGSET_NWORDS (64 / (8 * sizeof (unsigned long)))
+#endif
typedef struct {
- unsigned long int __val[_SIGSET_NWORDS];
+ unsigned long __val[_SIGSET_NWORDS];
} __sigset_t;
#endif
@@ -53,10 +62,10 @@ typedef struct {
/* Return a mask that includes the bit for SIG only. */
/* Unsigned cast ensures shift/mask insns are used. */
# define __sigmask(sig) \
- (((unsigned long int) 1) << ((unsigned)((sig) - 1) % (8 * sizeof (unsigned long int))))
+ (((unsigned long) 1) << ((unsigned)((sig) - 1) % (8 * sizeof (unsigned long))))
/* Return the word index for SIG. */
-# define __sigword(sig) ((unsigned)((sig) - 1) / (8 * sizeof (unsigned long int)))
+# define __sigword(sig) ((unsigned)((sig) - 1) / (8 * sizeof (unsigned long)))
/* gcc 4.3.1 is not clever enough to optimize for _SIGSET_NWORDS == 1 and 2,
* which are about the only values which can be there */
@@ -161,8 +170,8 @@ libc_hidden_proto(__sigdelset)
_EXTERN_INLINE int \
NAME (CONST __sigset_t *__set, int __sig) \
{ \
- unsigned long int __mask = __sigmask (__sig); \
- unsigned long int __word = __sigword (__sig); \
+ unsigned long __mask = __sigmask (__sig); \
+ unsigned long __word = __sigword (__sig); \
return BODY; \
}
diff --git a/libc/sysdeps/linux/i386/sigaction.c b/libc/sysdeps/linux/i386/sigaction.c
index 32c8f64bc..e323d0938 100644
--- a/libc/sysdeps/linux/i386/sigaction.c
+++ b/libc/sysdeps/linux/i386/sigaction.c
@@ -39,38 +39,44 @@ extern void restore (void) __asm__ ("__restore") attribute_hidden;
If OACT is not NULL, put the old action for SIG in *OACT. */
int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
- int result;
- struct kernel_sigaction kact, koact;
+ int result;
+ struct kernel_sigaction kact, koact;
+ enum {
+ SIGSET_MIN_SIZE = sizeof(kact.sa_mask) < sizeof(act->sa_mask)
+ ? sizeof(kact.sa_mask) : sizeof(act->sa_mask)
+ };
#ifdef SIGCANCEL
- if (sig == SIGCANCEL) {
- __set_errno (EINVAL);
- return -1;
- }
+ if (sig == SIGCANCEL) {
+ __set_errno (EINVAL);
+ return -1;
+ }
#endif
- if (act) {
- kact.k_sa_handler = act->sa_handler;
- memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask));
- kact.sa_flags = act->sa_flags;
-
- kact.sa_flags = act->sa_flags | SA_RESTORER;
- kact.sa_restorer = ((act->sa_flags & SA_SIGINFO)
- ? &restore_rt : &restore);
- }
-
- /* XXX The size argument hopefully will have to be changed to the
- real size of the user-level sigset_t. */
- result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
- oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
-
- if (oact && result >= 0) {
- oact->sa_handler = koact.k_sa_handler;
- memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
- oact->sa_flags = koact.sa_flags;
- oact->sa_restorer = koact.sa_restorer;
- }
- return result;
+ 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;
+
+ kact.sa_flags = act->sa_flags | SA_RESTORER;
+ kact.sa_restorer = ((act->sa_flags & SA_SIGINFO)
+ ? &restore_rt : &restore);
+ }
+
+ /* 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(sig,
+ 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;
}
diff --git a/libc/sysdeps/linux/mips/bits/signum.h b/libc/sysdeps/linux/mips/bits/signum.h
index a9b684834..6176b90b9 100644
--- a/libc/sysdeps/linux/mips/bits/signum.h
+++ b/libc/sysdeps/linux/mips/bits/signum.h
@@ -65,7 +65,7 @@
#define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
-#define _NSIG 128 /* Biggest signal number + 1
+#define _NSIG 129 /* Biggest signal number + 1
(including real-time signals). */
#define SIGRTMIN (__libc_current_sigrtmin ())
diff --git a/libc/sysdeps/linux/mips/sigaction.c b/libc/sysdeps/linux/mips/sigaction.c
index edd265438..ca39740af 100644
--- a/libc/sysdeps/linux/mips/sigaction.c
+++ b/libc/sysdeps/linux/mips/sigaction.c
@@ -47,36 +47,42 @@ static void restore (void) __asm__ ("__restore");
If OACT is not NULL, put the old action for SIG in *OACT. */
int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
- int result;
- struct kernel_sigaction kact, koact;
-
- if (act) {
- kact.k_sa_handler = act->sa_handler;
- memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask));
- kact.sa_flags = act->sa_flags;
+ int result;
+ struct kernel_sigaction kact, koact;
+ 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;
# ifdef HAVE_SA_RESTORER
# if _MIPS_SIM == _ABIO32
- kact.sa_restorer = act->sa_restorer;
+ kact.sa_restorer = act->sa_restorer;
# else
- kact.sa_restorer = &restore_rt;
+ kact.sa_restorer = &restore_rt;
# endif
# endif
- }
-
- /* XXX The size argument hopefully will have to be changed to the
- real size of the user-level sigset_t. */
- result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
- oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
-
- if (oact && result >= 0) {
- oact->sa_handler = koact.k_sa_handler;
- memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
- oact->sa_flags = koact.sa_flags;
+ }
+
+ /* 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(sig,
+ 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;
# ifdef HAVE_SA_RESTORER
- oact->sa_restorer = koact.sa_restorer;
+ oact->sa_restorer = koact.sa_restorer;
# endif
- }
- return result;
+ }
+ return result;
}
diff --git a/libc/sysdeps/linux/x86_64/sigaction.c b/libc/sysdeps/linux/x86_64/sigaction.c
index 3d9e4ea29..e53e30442 100644
--- a/libc/sysdeps/linux/x86_64/sigaction.c
+++ b/libc/sysdeps/linux/x86_64/sigaction.c
@@ -50,23 +50,29 @@ __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct kernel_sigaction kact, koact;
+ 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, sizeof (sigset_t));
+ memcpy (&kact.sa_mask, &act->sa_mask, SIGSET_MIN_SIZE);
kact.sa_flags = act->sa_flags | SA_RESTORER;
kact.sa_restorer = &restore_rt;
}
- /* XXX The size argument hopefully will have to be changed to the
- real size of the user-level sigset_t. */
- result = INLINE_SYSCALL (rt_sigaction, 4,
- sig, act ? __ptrvalue (&kact) : NULL,
- oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
+ /* NB: kernel (as of 2.6.25) will return EINVAL
+ * if sizeof(kact.sa_mask) does not match kernel's sizeof(sigset_t) */
+ result = INLINE_SYSCALL (rt_sigaction, 4, sig,
+ 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, sizeof (sigset_t));
+ memcpy (&oact->sa_mask, &koact.sa_mask, SIGSET_MIN_SIZE);
oact->sa_flags = koact.sa_flags;
oact->sa_restorer = koact.sa_restorer;
}
diff --git a/libc/sysdeps/linux/xtensa/sigaction.c b/libc/sysdeps/linux/xtensa/sigaction.c
index 790a8f21f..c6c24fc36 100644
--- a/libc/sysdeps/linux/xtensa/sigaction.c
+++ b/libc/sysdeps/linux/xtensa/sigaction.c
@@ -20,14 +20,18 @@ extern void __default_sa_restorer (void);
/* Experimentally off - libc_hidden_proto(memcpy) */
int __libc_sigaction (int signum, const struct sigaction *act,
- struct sigaction *oldact)
+ struct sigaction *oact)
{
- struct kernel_sigaction kact, koldact;
+ 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, sizeof (kact.sa_mask));
+ memcpy(&kact.sa_mask, &act->sa_mask, SIGSET_MIN_SIZE);
kact.sa_flags = act->sa_flags;
if (kact.sa_flags & SA_RESTORER) {
@@ -38,15 +42,18 @@ int __libc_sigaction (int signum, const struct sigaction *act,
}
}
- result = __syscall_rt_sigaction(signum, act ? __ptrvalue (&kact) : NULL,
- oldact ? __ptrvalue (&koldact) : NULL,
- _NSIG / 8);
+ /* 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 (oldact && result >= 0) {
- oldact->sa_handler = koldact.k_sa_handler;
- memcpy(&oldact->sa_mask, &koldact.sa_mask, sizeof(oldact->sa_mask));
- oldact->sa_flags = koldact.sa_flags;
- oldact->sa_restorer = koldact.sa_restorer;
+ 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;