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https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
cris: 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
Richard Weinberger
parent
e19c025bc9
commit
fa0197722e
2 changed files with 63 additions and 93 deletions
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@ -228,33 +228,33 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
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* user-mode trampoline.
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*/
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static int setup_frame(int sig, struct k_sigaction *ka,
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sigset_t *set, struct pt_regs *regs)
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static int setup_frame(struct ksignal *ksig, sigset_t *set,
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struct pt_regs *regs)
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{
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struct sigframe __user *frame;
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unsigned long return_ip;
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int err = 0;
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frame = get_sigframe(ka, regs, sizeof(*frame));
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frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
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if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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goto give_sigsegv;
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return -EFAULT;
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err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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if (_NSIG_WORDS > 1) {
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err |= __copy_to_user(frame->extramask, &set->sig[1],
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sizeof(frame->extramask));
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* Set up to return from userspace. If provided, use a stub
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already in userspace. */
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if (ka->sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ka->sa.sa_restorer;
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if (ksig->ka.sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ksig->ka.sa.sa_restorer;
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} else {
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/* trampoline - the desired return ip is the retcode itself */
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return_ip = (unsigned long)&frame->retcode;
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@ -265,42 +265,38 @@ static int setup_frame(int sig, struct k_sigaction *ka,
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* Set up registers for signal handler */
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regs->irp = (unsigned long) ka->sa.sa_handler; /* what we enter NOW */
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regs->irp = (unsigned long) ksig->ka.sa.sa_handler; /* what we enter NOW */
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regs->srp = return_ip; /* what we enter LATER */
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regs->r10 = sig; /* first argument is signo */
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regs->r10 = ksig->sig; /* first argument is signo */
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/* actually move the usp to reflect the stacked frame */
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wrusp((unsigned long)frame);
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return 0;
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give_sigsegv:
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force_sigsegv(sig, current);
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return -EFAULT;
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}
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static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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sigset_t *set, struct pt_regs *regs)
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static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
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struct pt_regs *regs)
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{
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struct rt_sigframe __user *frame;
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unsigned long return_ip;
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int err = 0;
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frame = get_sigframe(ka, regs, sizeof(*frame));
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frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
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if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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goto give_sigsegv;
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return -EFAULT;
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err |= __put_user(&frame->info, &frame->pinfo);
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err |= __put_user(&frame->uc, &frame->puc);
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err |= copy_siginfo_to_user(&frame->info, info);
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err |= copy_siginfo_to_user(&frame->info, &ksig->info);
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* Clear all the bits of the ucontext we don't use. */
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err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
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@ -312,12 +308,12 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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err |= __save_altstack(&frame->uc.uc_stack, rdusp());
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* Set up to return from userspace. If provided, use a stub
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already in userspace. */
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if (ka->sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ka->sa.sa_restorer;
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if (ksig->ka.sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ksig->ka.sa.sa_restorer;
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} else {
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/* trampoline - the desired return ip is the retcode itself */
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return_ip = (unsigned long)&frame->retcode;
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@ -329,18 +325,18 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* TODO what is the current->exec_domain stuff and invmap ? */
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/* Set up registers for signal handler */
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/* What we enter NOW */
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regs->irp = (unsigned long) ka->sa.sa_handler;
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regs->irp = (unsigned long) ksig->ka.sa.sa_handler;
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/* What we enter LATER */
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regs->srp = return_ip;
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/* First argument is signo */
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regs->r10 = sig;
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regs->r10 = ksig->sig;
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/* Second argument is (siginfo_t *) */
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regs->r11 = (unsigned long)&frame->info;
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/* Third argument is unused */
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@ -350,19 +346,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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wrusp((unsigned long)frame);
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return 0;
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give_sigsegv:
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force_sigsegv(sig, current);
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return -EFAULT;
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}
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/*
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* OK, we're invoking a handler
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*/
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static inline void handle_signal(int canrestart, unsigned long sig,
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siginfo_t *info, struct k_sigaction *ka,
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struct pt_regs *regs)
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static inline void handle_signal(int canrestart, struct ksignal *ksig,
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struct pt_regs *regs)
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{
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sigset_t *oldset = sigmask_to_save();
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int ret;
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@ -383,7 +374,7 @@ static inline void handle_signal(int canrestart, unsigned long sig,
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/* ERESTARTSYS means to restart the syscall if
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* there is no handler or the handler was
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* registered with SA_RESTART */
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if (!(ka->sa.sa_flags & SA_RESTART)) {
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if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
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regs->r10 = -EINTR;
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break;
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}
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@ -396,13 +387,12 @@ static inline void handle_signal(int canrestart, unsigned long sig,
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}
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/* Set up the stack frame */
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if (ka->sa.sa_flags & SA_SIGINFO)
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ret = setup_rt_frame(sig, ka, info, oldset, regs);
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if (ksig->ka.sa.sa_flags & SA_SIGINFO)
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ret = setup_rt_frame(ksig, oldset, regs);
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else
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ret = setup_frame(sig, ka, oldset, regs);
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ret = setup_frame(ksig, oldset, regs);
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if (ret == 0)
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signal_delivered(sig, info, ka, regs, 0);
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signal_setup_done(ret, ksig, 0);
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}
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/*
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@ -419,9 +409,7 @@ static inline void handle_signal(int canrestart, unsigned long sig,
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void do_signal(int canrestart, struct pt_regs *regs)
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{
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siginfo_t info;
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int signr;
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struct k_sigaction ka;
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struct ksignal ksig;
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/*
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* We want the common case to go fast, which
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@ -432,10 +420,9 @@ void do_signal(int canrestart, struct pt_regs *regs)
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if (!user_mode(regs))
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return;
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signr = get_signal_to_deliver(&info, &ka, regs, NULL);
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if (signr > 0) {
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if (get_signal(&ksig)) {
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/* Whee! Actually deliver the signal. */
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handle_signal(canrestart, signr, &info, &ka, regs);
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handle_signal(canrestart, &ksig, regs);
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return;
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}
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@ -215,23 +215,22 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
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* trampoline.
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*/
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static int
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setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
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struct pt_regs * regs)
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setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
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{
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int err;
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unsigned long return_ip;
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struct signal_frame __user *frame;
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err = 0;
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frame = get_sigframe(ka, regs, sizeof(*frame));
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frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
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if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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goto give_sigsegv;
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return -EFAULT;
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err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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if (_NSIG_WORDS > 1) {
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err |= __copy_to_user(frame->extramask, &set->sig[1],
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@ -239,14 +238,14 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/*
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* Set up to return from user-space. If provided, use a stub
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* already located in user-space.
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*/
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if (ka->sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ka->sa.sa_restorer;
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if (ksig->ka.sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long)ksig->ka.sa.sa_restorer;
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} else {
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/* Trampoline - the desired return ip is in the signal return page. */
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return_ip = cris_signal_return_page;
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@ -264,7 +263,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/*
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* Set up registers for signal handler.
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@ -273,42 +272,37 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
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* Where the code enter later.
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* First argument, signo.
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*/
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regs->erp = (unsigned long) ka->sa.sa_handler;
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regs->erp = (unsigned long) ksig->ka.sa.sa_handler;
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regs->srp = return_ip;
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regs->r10 = sig;
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regs->r10 = ksig->sig;
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/* Actually move the USP to reflect the stacked frame. */
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wrusp((unsigned long)frame);
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return 0;
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give_sigsegv:
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force_sigsegv(sig, current);
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return -EFAULT;
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}
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static int
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setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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sigset_t *set, struct pt_regs * regs)
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setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
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{
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int err;
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unsigned long return_ip;
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struct rt_signal_frame __user *frame;
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err = 0;
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frame = get_sigframe(ka, regs, sizeof(*frame));
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frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
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if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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goto give_sigsegv;
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return -EFAULT;
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/* TODO: what is the current->exec_domain stuff and invmap ? */
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err |= __put_user(&frame->info, &frame->pinfo);
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err |= __put_user(&frame->uc, &frame->puc);
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err |= copy_siginfo_to_user(&frame->info, info);
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err |= copy_siginfo_to_user(&frame->info, &ksig->info);
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/* Clear all the bits of the ucontext we don't use. */
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err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
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@ -317,14 +311,14 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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err |= __save_altstack(&frame->uc.uc_stack, rdusp());
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/*
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* Set up to return from user-space. If provided, use a stub
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* already located in user-space.
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*/
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if (ka->sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long) ka->sa.sa_restorer;
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if (ksig->ka.sa.sa_flags & SA_RESTORER) {
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return_ip = (unsigned long) ksig->ka.sa.sa_restorer;
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} else {
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/* Trampoline - the desired return ip is in the signal return page. */
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return_ip = cris_signal_return_page + 6;
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@ -345,7 +339,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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}
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if (err)
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goto give_sigsegv;
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return -EFAULT;
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/*
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* Set up registers for signal handler.
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@ -356,9 +350,9 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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* Second argument is (siginfo_t *).
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* Third argument is unused.
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*/
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regs->erp = (unsigned long) ka->sa.sa_handler;
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regs->erp = (unsigned long) ksig->ka.sa.sa_handler;
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regs->srp = return_ip;
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regs->r10 = sig;
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regs->r10 = ksig->sig;
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regs->r11 = (unsigned long) &frame->info;
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regs->r12 = 0;
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@ -366,17 +360,11 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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wrusp((unsigned long)frame);
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return 0;
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give_sigsegv:
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force_sigsegv(sig, current);
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return -EFAULT;
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}
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/* Invoke a signal handler to, well, handle the signal. */
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static inline void
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handle_signal(int canrestart, unsigned long sig,
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siginfo_t *info, struct k_sigaction *ka,
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struct pt_regs * regs)
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handle_signal(int canrestart, struct ksignal *ksig, struct pt_regs *regs)
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{
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sigset_t *oldset = sigmask_to_save();
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int ret;
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@ -404,7 +392,7 @@ handle_signal(int canrestart, unsigned long sig,
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* there is no handler, or the handler
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* was registered with SA_RESTART.
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*/
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if (!(ka->sa.sa_flags & SA_RESTART)) {
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if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
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regs->r10 = -EINTR;
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break;
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}
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@ -423,13 +411,12 @@ handle_signal(int canrestart, unsigned long sig,
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}
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/* Set up the stack frame. */
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if (ka->sa.sa_flags & SA_SIGINFO)
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ret = setup_rt_frame(sig, ka, info, oldset, regs);
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if (ksig->ka.sa.sa_flags & SA_SIGINFO)
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ret = setup_rt_frame(ksig, oldset, regs);
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else
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ret = setup_frame(sig, ka, oldset, regs);
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ret = setup_frame(ksig, oldset, regs);
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if (ret == 0)
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signal_delivered(sig, info, ka, regs, 0);
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signal_setup_done(ret, ksig, 0);
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}
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/*
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@ -446,9 +433,7 @@ handle_signal(int canrestart, unsigned long sig,
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void
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do_signal(int canrestart, struct pt_regs *regs)
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{
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int signr;
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siginfo_t info;
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struct k_sigaction ka;
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struct ksignal ksig;
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/*
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* The common case should go fast, which is why this point is
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@ -458,11 +443,9 @@ do_signal(int canrestart, struct pt_regs *regs)
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if (!user_mode(regs))
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return;
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signr = get_signal_to_deliver(&info, &ka, regs, NULL);
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if (signr > 0) {
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if (get_signal(&ksig)) {
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/* Whee! Actually deliver the signal. */
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handle_signal(canrestart, signr, &info, &ka, regs);
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handle_signal(canrestart, &ksig, regs);
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return;
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}
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