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mn10300: Use get_signal() signal_setup_done() 

Use the more generic functions get_signal() signal_setup_done()
for signal delivery.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2013-10-07 14:22:50 +02:00 committed by Richard Weinberger
parent 81d103bf80
commit 8b166553a9
1 changed files with 36 additions and 53 deletions
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89
arch/mn10300/kernel/signal.c
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@ -207,16 +207,16 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
/* /*
* set up a normal signal frame * set up a normal signal frame
*/ */
static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, static int setup_frame(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs) struct pt_regs *regs)
{ {
struct sigframe __user *frame; struct sigframe __user *frame;
int rsig; int rsig, sig = ksig->sig;
frame = get_sigframe(ka, regs, sizeof(*frame)); frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv; return -EFAULT;
rsig = sig; rsig = sig;
if (sig < 32 && if (sig < 32 &&
@ -226,40 +226,40 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
if (__put_user(rsig, &frame->sig) < 0 || if (__put_user(rsig, &frame->sig) < 0 ||
__put_user(&frame->sc, &frame->psc) < 0) __put_user(&frame->sc, &frame->psc) < 0)
goto give_sigsegv; return -EFAULT;
if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0])) if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0]))
goto give_sigsegv; return -EFAULT;
if (_NSIG_WORDS > 1) { if (_NSIG_WORDS > 1) {
if (__copy_to_user(frame->extramask, &set->sig[1], if (__copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask))) sizeof(frame->extramask)))
goto give_sigsegv; return -EFAULT;
} }
/* set up to return from userspace. If provided, use a stub already in /* set up to return from userspace. If provided, use a stub already in
* userspace */ * userspace */
if (ka->sa.sa_flags & SA_RESTORER) { if (ksig->ka.sa.sa_flags & SA_RESTORER) {
if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
goto give_sigsegv; return -EFAULT;
} else { } else {
if (__put_user((void (*)(void))frame->retcode, if (__put_user((void (*)(void))frame->retcode,
&frame->pretcode)) &frame->pretcode))
goto give_sigsegv; return -EFAULT;
/* this is mov $,d0; syscall 0 */ /* this is mov $,d0; syscall 0 */
if (__put_user(0x2c, (char *)(frame->retcode + 0)) || if (__put_user(0x2c, (char *)(frame->retcode + 0)) ||
__put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) || __put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) ||
__put_user(0x00, (char *)(frame->retcode + 2)) || __put_user(0x00, (char *)(frame->retcode + 2)) ||
__put_user(0xf0, (char *)(frame->retcode + 3)) || __put_user(0xf0, (char *)(frame->retcode + 3)) ||
__put_user(0xe0, (char *)(frame->retcode + 4))) __put_user(0xe0, (char *)(frame->retcode + 4)))
goto give_sigsegv; return -EFAULT;
flush_icache_range((unsigned long) frame->retcode, flush_icache_range((unsigned long) frame->retcode,
(unsigned long) frame->retcode + 5); (unsigned long) frame->retcode + 5);
} }
/* set up registers for signal handler */ /* set up registers for signal handler */
regs->sp = (unsigned long) frame; regs->sp = (unsigned long) frame;
regs->pc = (unsigned long) ka->sa.sa_handler; regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->d0 = sig; regs->d0 = sig;
regs->d1 = (unsigned long) &frame->sc; regs->d1 = (unsigned long) &frame->sc;
@ -270,25 +270,21 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
#endif #endif
return 0; return 0;
give_sigsegv:
force_sigsegv(sig, current);
return -EFAULT;
} }
/* /*
* set up a realtime signal frame * set up a realtime signal frame
*/ */
static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
sigset_t *set, struct pt_regs *regs) struct pt_regs *regs)
{ {
struct rt_sigframe __user *frame; struct rt_sigframe __user *frame;
int rsig; int rsig, sig = ksig->sig;
frame = get_sigframe(ka, regs, sizeof(*frame)); frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv; return -EFAULT;
rsig = sig; rsig = sig;
if (sig < 32 && if (sig < 32 &&
@ -299,8 +295,8 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (__put_user(rsig, &frame->sig) || if (__put_user(rsig, &frame->sig) ||
__put_user(&frame->info, &frame->pinfo) || __put_user(&frame->info, &frame->pinfo) ||
__put_user(&frame->uc, &frame->puc) || __put_user(&frame->uc, &frame->puc) ||
copy_siginfo_to_user(&frame->info, info)) copy_siginfo_to_user(&frame->info, &ksig->info))
goto give_sigsegv; return -EFAULT;
/* create the ucontext. */ /* create the ucontext. */
if (__put_user(0, &frame->uc.uc_flags) || if (__put_user(0, &frame->uc.uc_flags) ||
@ -309,13 +305,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
setup_sigcontext(&frame->uc.uc_mcontext, setup_sigcontext(&frame->uc.uc_mcontext,
&frame->fpuctx, regs, set->sig[0]) || &frame->fpuctx, regs, set->sig[0]) ||
__copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set))) __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 /* set up to return from userspace. If provided, use a stub already in
* userspace */ * userspace */
if (ka->sa.sa_flags & SA_RESTORER) { if (ksig->ka.sa.sa_flags & SA_RESTORER) {
if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
goto give_sigsegv; return -EFAULT;
} else { } else {
if (__put_user((void(*)(void))frame->retcode, if (__put_user((void(*)(void))frame->retcode,
&frame->pretcode) || &frame->pretcode) ||
@ -326,7 +323,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
__put_user(0x00, (char *)(frame->retcode + 2)) || __put_user(0x00, (char *)(frame->retcode + 2)) ||
__put_user(0xf0, (char *)(frame->retcode + 3)) || __put_user(0xf0, (char *)(frame->retcode + 3)) ||
__put_user(0xe0, (char *)(frame->retcode + 4))) __put_user(0xe0, (char *)(frame->retcode + 4)))
goto give_sigsegv; return -EFAULT;
flush_icache_range((u_long) frame->retcode, flush_icache_range((u_long) frame->retcode,
(u_long) frame->retcode + 5); (u_long) frame->retcode + 5);
@ -334,7 +331,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up registers for signal handler */ /* Set up registers for signal handler */
regs->sp = (unsigned long) frame; regs->sp = (unsigned long) frame;
regs->pc = (unsigned long) ka->sa.sa_handler; regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->d0 = sig; regs->d0 = sig;
regs->d1 = (long) &frame->info; regs->d1 = (long) &frame->info;
@ -345,10 +342,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
#endif #endif
return 0; return 0;
give_sigsegv:
force_sigsegv(sig, current);
return -EFAULT;
} }
static inline void stepback(struct pt_regs *regs) static inline void stepback(struct pt_regs *regs)
@ -360,9 +353,7 @@ static inline void stepback(struct pt_regs *regs)
/* /*
* handle the actual delivery of a signal to userspace * handle the actual delivery of a signal to userspace
*/ */
static int handle_signal(int sig, static int handle_signal(struct ksignal *ksig, struct pt_regs *regs)
siginfo_t *info, struct k_sigaction *ka,
struct pt_regs *regs)
{ {
sigset_t *oldset = sigmask_to_save(); sigset_t *oldset = sigmask_to_save();
int ret; int ret;
@ -377,7 +368,7 @@ static int handle_signal(int sig,
break; break;
case -ERESTARTSYS: case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) { if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
regs->d0 = -EINTR; regs->d0 = -EINTR;
break; break;
} }
@ -390,15 +381,12 @@ static int handle_signal(int sig,
} }
/* Set up the stack frame */ /* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO) if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(sig, ka, info, oldset, regs); ret = setup_rt_frame(ksig, oldset, regs);
else else
ret = setup_frame(sig, ka, oldset, regs); ret = setup_frame(ksig, oldset, regs);
if (ret)
return ret;
signal_delivered(sig, info, ka, regs, signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
test_thread_flag(TIF_SINGLESTEP));
return 0; return 0;
} }
@ -407,15 +395,10 @@ static int handle_signal(int sig,
*/ */
static void do_signal(struct pt_regs *regs) static void do_signal(struct pt_regs *regs)
{ {
struct k_sigaction ka; struct ksignal ksig;
siginfo_t info;
int signr;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
if (handle_signal(signr, &info, &ka, regs) == 0) {
}
if (get_signal(&ksig)) {
handle_signal(&ksig, regs);
return; return;
} }