diff options
Diffstat (limited to 'arch/m68knommu/kernel/signal.c')
| -rw-r--r-- | arch/m68knommu/kernel/signal.c | 188 |
1 files changed, 82 insertions, 106 deletions
diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c index 5ab6a04af14..36a81bb6835 100644 --- a/arch/m68knommu/kernel/signal.c +++ b/arch/m68knommu/kernel/signal.c @@ -53,65 +53,30 @@ void ret_from_user_signal(void); void ret_from_user_rt_signal(void); -asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs); /* * Atomically swap in the new signal mask, and wait for a signal. */ -asmlinkage int do_sigsuspend(struct pt_regs *regs) +asmlinkage int +sys_sigsuspend(int unused0, int unused1, old_sigset_t mask) { - old_sigset_t mask = regs->d3; - sigset_t saveset; - mask &= _BLOCKABLE; spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; + current->saved_sigmask = current->blocked; siginitset(¤t->blocked, mask); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - regs->d0 = -EINTR; - while (1) { - current->state = TASK_INTERRUPTIBLE; - schedule(); - if (do_signal(&saveset, regs)) - return -EINTR; - } -} - -asmlinkage int -do_rt_sigsuspend(struct pt_regs *regs) -{ - sigset_t *unewset = (sigset_t *)regs->d1; - size_t sigsetsize = (size_t)regs->d2; - sigset_t saveset, newset; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_restore_sigmask(); - if (copy_from_user(&newset, unewset, sizeof(newset))) - return -EFAULT; - sigdelsetmask(&newset, ~_BLOCKABLE); - - spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - regs->d0 = -EINTR; - while (1) { - current->state = TASK_INTERRUPTIBLE; - schedule(); - if (do_signal(&saveset, regs)) - return -EINTR; - } + return -ERESTARTNOHAND; } -asmlinkage int -sys_sigaction(int sig, const struct old_sigaction *act, - struct old_sigaction *oact) +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction __user *act, + struct old_sigaction __user *oact) { struct k_sigaction new_ka, old_ka; int ret; @@ -120,10 +85,10 @@ sys_sigaction(int sig, const struct old_sigaction *act, old_sigset_t mask; if (!access_ok(VERIFY_READ, act, sizeof(*act)) || __get_user(new_ka.sa.sa_handler, &act->sa_handler) || - __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) return -EFAULT; - __get_user(new_ka.sa.sa_flags, &act->sa_flags); - __get_user(mask, &act->sa_mask); siginitset(&new_ka.sa.sa_mask, mask); } @@ -132,17 +97,17 @@ sys_sigaction(int sig, const struct old_sigaction *act, if (!ret && oact) { if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || - __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) return -EFAULT; - __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); } return ret; } asmlinkage int -sys_sigaltstack(const stack_t *uss, stack_t *uoss) +sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) { return do_sigaltstack(uss, uoss, rdusp()); } @@ -157,10 +122,10 @@ sys_sigaltstack(const stack_t *uss, stack_t *uoss) struct sigframe { - char *pretcode; + char __user *pretcode; int sig; int code; - struct sigcontext *psc; + struct sigcontext __user *psc; char retcode[8]; unsigned long extramask[_NSIG_WORDS-1]; struct sigcontext sc; @@ -168,10 +133,10 @@ struct sigframe struct rt_sigframe { - char *pretcode; + char __user *pretcode; int sig; - struct siginfo *pinfo; - void *puc; + struct siginfo __user *pinfo; + void __user *puc; char retcode[8]; struct siginfo info; struct ucontext uc; @@ -198,8 +163,8 @@ static inline int restore_fpu_state(struct sigcontext *sc) goto out; __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %0,%/fp0-%/fp1\n\t" - "fmoveml %1,%/fpcr/%/fpsr/%/fpiar\n\t" + "fmovemx %0,%%fp0-%%fp1\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" ".chip 68k" : /* no outputs */ : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl)); @@ -218,7 +183,7 @@ out: #define uc_formatvec uc_filler[FPCONTEXT_SIZE/4] #define uc_extra uc_filler[FPCONTEXT_SIZE/4+1] -static inline int rt_restore_fpu_state(struct ucontext *uc) +static inline int rt_restore_fpu_state(struct ucontext __user *uc) { unsigned char fpstate[FPCONTEXT_SIZE]; int context_size = 0; @@ -228,7 +193,7 @@ static inline int rt_restore_fpu_state(struct ucontext *uc) if (FPU_IS_EMU) { /* restore fpu control register */ if (__copy_from_user(current->thread.fpcntl, - &uc->uc_mcontext.fpregs.f_pcr, 12)) + uc->uc_mcontext.fpregs.f_fpcntl, 12)) goto out; /* restore all other fpu register */ if (__copy_from_user(current->thread.fp, @@ -237,7 +202,7 @@ static inline int rt_restore_fpu_state(struct ucontext *uc) return 0; } - if (__get_user(*(long *)fpstate, (long *)&uc->uc_fpstate)) + if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate)) goto out; if (fpstate[0]) { context_size = fpstate[1]; @@ -249,15 +214,15 @@ static inline int rt_restore_fpu_state(struct ucontext *uc) sizeof(fpregs))) goto out; __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %0,%/fp0-%/fp7\n\t" - "fmoveml %1,%/fpcr/%/fpsr/%/fpiar\n\t" + "fmovemx %0,%%fp0-%%fp7\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" ".chip 68k" : /* no outputs */ : "m" (*fpregs.f_fpregs), - "m" (fpregs.f_pcr)); + "m" (*fpregs.f_fpcntl)); } if (context_size && - __copy_from_user(fpstate + 4, (long *)&uc->uc_fpstate + 1, + __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1, context_size)) goto out; __asm__ volatile (".chip 68k/68881\n\t" @@ -272,7 +237,7 @@ out: #endif static inline int -restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc, void *fp, +restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp, int *pd0) { int formatvec; @@ -312,10 +277,10 @@ badframe: static inline int rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, - struct ucontext *uc, int *pd0) + struct ucontext __user *uc, int *pd0) { int temp; - greg_t *gregs = uc->uc_mcontext.gregs; + greg_t __user *gregs = uc->uc_mcontext.gregs; unsigned long usp; int err; @@ -365,7 +330,7 @@ asmlinkage int do_sigreturn(unsigned long __unused) struct switch_stack *sw = (struct switch_stack *) &__unused; struct pt_regs *regs = (struct pt_regs *) (sw + 1); unsigned long usp = rdusp(); - struct sigframe *frame = (struct sigframe *)(usp - 4); + struct sigframe __user *frame = (struct sigframe __user *)(usp - 4); sigset_t set; int d0; @@ -397,7 +362,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused) struct switch_stack *sw = (struct switch_stack *) &__unused; struct pt_regs *regs = (struct pt_regs *) (sw + 1); unsigned long usp = rdusp(); - struct rt_sigframe *frame = (struct rt_sigframe *)(usp - 4); + struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4); sigset_t set; int d0; @@ -443,17 +408,17 @@ static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs) if (sc->sc_fpstate[0]) { fpu_version = sc->sc_fpstate[0]; __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %/fp0-%/fp1,%0\n\t" - "fmoveml %/fpcr/%/fpsr/%/fpiar,%1\n\t" + "fmovemx %%fp0-%%fp1,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" ".chip 68k" - : /* no outputs */ - : "m" (*sc->sc_fpregs), - "m" (*sc->sc_fpcntl) + : "=m" (*sc->sc_fpregs), + "=m" (*sc->sc_fpcntl) + : /* no inputs */ : "memory"); } } -static inline int rt_save_fpu_state(struct ucontext *uc, struct pt_regs *regs) +static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs) { unsigned char fpstate[FPCONTEXT_SIZE]; int context_size = 0; @@ -461,7 +426,7 @@ static inline int rt_save_fpu_state(struct ucontext *uc, struct pt_regs *regs) if (FPU_IS_EMU) { /* save fpu control register */ - err |= copy_to_user(&uc->uc_mcontext.fpregs.f_pcr, + err |= copy_to_user(uc->uc_mcontext.fpregs.f_pcntl, current->thread.fpcntl, 12); /* save all other fpu register */ err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs, @@ -474,24 +439,24 @@ static inline int rt_save_fpu_state(struct ucontext *uc, struct pt_regs *regs) ".chip 68k" : : "m" (*fpstate) : "memory"); - err |= __put_user(*(long *)fpstate, (long *)&uc->uc_fpstate); + err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate); if (fpstate[0]) { fpregset_t fpregs; context_size = fpstate[1]; fpu_version = fpstate[0]; __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %/fp0-%/fp7,%0\n\t" - "fmoveml %/fpcr/%/fpsr/%/fpiar,%1\n\t" + "fmovemx %%fp0-%%fp7,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" ".chip 68k" - : /* no outputs */ - : "m" (*fpregs.f_fpregs), - "m" (fpregs.f_pcr) + : "=m" (*fpregs.f_fpregs), + "=m" (*fpregs.f_fpcntl) + : /* no inputs */ : "memory"); err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs, sizeof(fpregs)); } if (context_size) - err |= copy_to_user((long *)&uc->uc_fpstate + 1, fpstate + 4, + err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4, context_size); return err; } @@ -516,10 +481,10 @@ static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, #endif } -static inline int rt_setup_ucontext(struct ucontext *uc, struct pt_regs *regs) +static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs) { struct switch_stack *sw = (struct switch_stack *)regs - 1; - greg_t *gregs = uc->uc_mcontext.gregs; + greg_t __user *gregs = uc->uc_mcontext.gregs; int err = 0; err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version); @@ -547,7 +512,7 @@ static inline int rt_setup_ucontext(struct ucontext *uc, struct pt_regs *regs) return err; } -static inline void * +static inline void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) { unsigned long usp; @@ -560,13 +525,13 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) if (!sas_ss_flags(usp)) usp = current->sas_ss_sp + current->sas_ss_size; } - return (void *)((usp - frame_size) & -8UL); + return (void __user *)((usp - frame_size) & -8UL); } -static void setup_frame (int sig, struct k_sigaction *ka, +static int setup_frame (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *regs) { - struct sigframe *frame; + struct sigframe __user *frame; struct sigcontext context; int err = 0; @@ -617,17 +582,17 @@ adjust_stack: tregs->pc = regs->pc; tregs->sr = regs->sr; } - return; + return err; give_sigsegv: force_sigsegv(sig, current); goto adjust_stack; } -static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, +static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { - struct rt_sigframe *frame; + struct rt_sigframe __user *frame; int err = 0; frame = get_sigframe(ka, regs, sizeof(*frame)); @@ -644,8 +609,8 @@ static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); - err |= __put_user(0, &frame->uc.uc_link); - err |= __put_user((void *)current->sas_ss_sp, + err |= __put_user(NULL, &frame->uc.uc_link); + err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); err |= __put_user(sas_ss_flags(rdusp()), &frame->uc.uc_stack.ss_flags); @@ -681,7 +646,7 @@ adjust_stack: tregs->pc = regs->pc; tregs->sr = regs->sr; } - return; + return err; give_sigsegv: force_sigsegv(sig, current); @@ -728,6 +693,7 @@ static void handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) { + int err; /* are we from a system call? */ if (regs->orig_d0 >= 0) /* If so, check system call restarting.. */ @@ -735,12 +701,12 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, /* set up the stack frame */ if (ka->sa.sa_flags & SA_SIGINFO) - setup_rt_frame(sig, ka, info, oldset, regs); + err = setup_rt_frame(sig, ka, info, oldset, regs); else - setup_frame(sig, ka, oldset, regs); + err = setup_frame(sig, ka, oldset, regs); - if (ka->sa.sa_flags & SA_ONESHOT) - ka->sa.sa_handler = SIG_DFL; + if (err) + return; spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); @@ -748,6 +714,8 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, sigaddset(¤t->blocked,sig); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); + + clear_thread_flag(TIF_RESTORE_SIGMASK); } /* @@ -755,11 +723,12 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, * want to handle. Thus you cannot kill init even with a SIGKILL even by * mistake. */ -asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs) +asmlinkage void do_signal(struct pt_regs *regs) { struct k_sigaction ka; siginfo_t info; int signr; + sigset_t *oldset; /* * We want the common case to go fast, which @@ -768,16 +737,18 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs) * if so. */ if (!user_mode(regs)) - return 1; + return; - if (!oldset) + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else oldset = ¤t->blocked; signr = get_signal_to_deliver(&info, &ka, regs, NULL); if (signr > 0) { /* Whee! Actually deliver the signal. */ handle_signal(signr, &ka, &info, oldset, regs); - return 1; + return; } /* Did we come from a system call? */ @@ -785,5 +756,10 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs) /* Restart the system call - no handlers present */ handle_restart(regs, NULL, 0); } - return 0; + + /* If there's no signal to deliver, we just restore the saved mask. */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } } |