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Diffstat (limited to 'arch/frv')
-rw-r--r--arch/frv/kernel/signal.c112
1 files changed, 42 insertions, 70 deletions
diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index d822700d4f1..dc3d59de087 100644
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -158,19 +158,10 @@ static int setup_sigcontext(struct sigcontext __user *sc, unsigned long mask)
/*
* Determine which stack to use..
*/
-static inline void __user *get_sigframe(struct k_sigaction *ka,
+static inline void __user *get_sigframe(struct ksignal *ksig,
size_t frame_size)
{
- unsigned long sp;
-
- /* Default to using normal stack */
- sp = __frame->sp;
-
- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (! sas_ss_flags(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
+ unsigned long sp = sigsp(__frame->sp, ksig);
return (void __user *) ((sp - frame_size) & ~7UL);
@@ -180,17 +171,17 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
/*
*
*/
-static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
+static int setup_frame(struct ksignal *ksig, sigset_t *set)
{
struct sigframe __user *frame;
- int rsig;
+ int rsig, sig = ksig->sig;
set_fs(USER_DS);
- frame = get_sigframe(ka, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
rsig = sig;
if (sig < 32 &&
@@ -199,22 +190,22 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
rsig = __current_thread_info->exec_domain->signal_invmap[sig];
if (__put_user(rsig, &frame->sig) < 0)
- goto give_sigsegv;
+ return -EFAULT;
if (setup_sigcontext(&frame->sc, set->sig[0]))
- goto give_sigsegv;
+ return -EFAULT;
if (_NSIG_WORDS > 1) {
if (__copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask)))
- goto give_sigsegv;
+ return -EFAULT;
}
/* Set up to return from userspace. If provided, use a stub
* already in userspace. */
- if (ka->sa.sa_flags & SA_RESTORER) {
- if (__put_user(ka->sa.sa_restorer, &frame->pretcode) < 0)
- goto give_sigsegv;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+ if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode) < 0)
+ return -EFAULT;
}
else {
/* Set up the following code on the stack:
@@ -224,7 +215,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) ||
__put_user(0x8efc0000|__NR_sigreturn, &frame->retcode[0]) ||
__put_user(0xc0700000, &frame->retcode[1]))
- goto give_sigsegv;
+ return -EFAULT;
flush_icache_range((unsigned long) frame->retcode,
(unsigned long) (frame->retcode + 2));
@@ -233,14 +224,14 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
/* Set up registers for the signal handler */
if (current->personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
- (struct fdpic_func_descriptor __user *) ka->sa.sa_handler;
+ (struct fdpic_func_descriptor __user *) ksig->ka.sa.sa_handler;
struct fdpic_func_descriptor desc;
if (copy_from_user(&desc, funcptr, sizeof(desc)))
- goto give_sigsegv;
+ return -EFAULT;
__frame->pc = desc.text;
__frame->gr15 = desc.GOT;
} else {
- __frame->pc = (unsigned long) ka->sa.sa_handler;
+ __frame->pc = (unsigned long) ksig->ka.sa.sa_handler;
__frame->gr15 = 0;
}
@@ -255,29 +246,23 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
#endif
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
-
} /* end setup_frame() */
/*****************************************************************************/
/*
*
*/
-static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set)
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set)
{
struct rt_sigframe __user *frame;
- int rsig;
+ int rsig, sig = ksig->sig;
set_fs(USER_DS);
- frame = get_sigframe(ka, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
rsig = sig;
if (sig < 32 &&
@@ -288,28 +273,28 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (__put_user(rsig, &frame->sig) ||
__put_user(&frame->info, &frame->pinfo) ||
__put_user(&frame->uc, &frame->puc))
- goto give_sigsegv;
+ return -EFAULT;
- if (copy_siginfo_to_user(&frame->info, info))
- goto give_sigsegv;
+ if (copy_siginfo_to_user(&frame->info, &ksig->info))
+ return -EFAULT;
/* Create the ucontext. */
if (__put_user(0, &frame->uc.uc_flags) ||
__put_user(NULL, &frame->uc.uc_link) ||
__save_altstack(&frame->uc.uc_stack, __frame->sp))
- goto give_sigsegv;
+ return -EFAULT;
if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0]))
- goto give_sigsegv;
+ return -EFAULT;
if (__copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))
- goto give_sigsegv;
+ return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
* already in userspace. */
- if (ka->sa.sa_flags & SA_RESTORER) {
- if (__put_user(ka->sa.sa_restorer, &frame->pretcode))
- goto give_sigsegv;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+ if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
+ return -EFAULT;
}
else {
/* Set up the following code on the stack:
@@ -319,7 +304,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) ||
__put_user(0x8efc0000|__NR_rt_sigreturn, &frame->retcode[0]) ||
__put_user(0xc0700000, &frame->retcode[1]))
- goto give_sigsegv;
+ return -EFAULT;
flush_icache_range((unsigned long) frame->retcode,
(unsigned long) (frame->retcode + 2));
@@ -328,14 +313,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up registers for signal handler */
if (current->personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
- (struct fdpic_func_descriptor __user *) ka->sa.sa_handler;
+ (struct fdpic_func_descriptor __user *) ksig->ka.sa.sa_handler;
struct fdpic_func_descriptor desc;
if (copy_from_user(&desc, funcptr, sizeof(desc)))
- goto give_sigsegv;
+ return -EFAULT;
__frame->pc = desc.text;
__frame->gr15 = desc.GOT;
} else {
- __frame->pc = (unsigned long) ka->sa.sa_handler;
+ __frame->pc = (unsigned long) ksig->ka.sa.sa_handler;
__frame->gr15 = 0;
}
@@ -349,21 +334,15 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sig, current->comm, current->pid, frame, __frame->pc,
frame->pretcode);
#endif
-
return 0;
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
-
} /* end setup_rt_frame() */
/*****************************************************************************/
/*
* OK, we're invoking a handler
*/
-static void handle_signal(unsigned long sig, siginfo_t *info,
- struct k_sigaction *ka)
+static void handle_signal(struct ksignal *ksig)
{
sigset_t *oldset = sigmask_to_save();
int ret;
@@ -378,7 +357,7 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
break;
case -ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART)) {
+ if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
__frame->gr8 = -EINTR;
break;
}
@@ -392,16 +371,12 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
}
/* Set up the stack frame */
- if (ka->sa.sa_flags & SA_SIGINFO)
- ret = setup_rt_frame(sig, ka, info, oldset);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ ret = setup_rt_frame(ksig, oldset);
else
- ret = setup_frame(sig, ka, oldset);
-
- if (ret)
- return;
+ ret = setup_frame(ksig, oldset);
- signal_delivered(sig, info, ka, __frame,
- test_thread_flag(TIF_SINGLESTEP));
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
} /* end handle_signal() */
/*****************************************************************************/
@@ -412,13 +387,10 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
*/
static void do_signal(void)
{
- struct k_sigaction ka;
- siginfo_t info;
- int signr;
+ struct ksignal ksig;
- signr = get_signal_to_deliver(&info, &ka, __frame, NULL);
- if (signr > 0) {
- handle_signal(signr, &info, &ka);
+ if (get_signal(&ksig)) {
+ handle_signal(&ksig);
return;
}