diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index f92856b98b70..640b5f3611ee 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -9,6 +9,7 @@ * this archive for more details. */ +#include #include #include #include @@ -16,6 +17,19 @@ #include "signal.h" +#ifdef CONFIG_PPC64 +static inline int is_32bit_task(void) +{ + return test_thread_flag(TIF_32BIT); +} +#else +static inline int is_32bit_task(void) +{ + return 1; +} +#endif + + /* * Restore the user process's signal mask */ @@ -28,8 +42,8 @@ void restore_sigmask(sigset_t *set) spin_unlock_irq(¤t->sighand->siglock); } -void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, - int has_handler) +static void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, + int has_handler) { unsigned long ret = regs->gpr[3]; int restart = 1; @@ -79,6 +93,95 @@ void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, } } +int do_signal(sigset_t *oldset, struct pt_regs *regs) +{ + siginfo_t info; + int signr; + struct k_sigaction ka; + int ret; + int is32 = is_32bit_task(); + +#ifdef CONFIG_PPC32 + if (try_to_freeze()) { + signr = 0; + if (!signal_pending(current)) + goto no_signal; + } +#endif + + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else if (!oldset) + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + +#ifdef CONFIG_PPC32 +no_signal: +#endif + /* Is there any syscall restart business here ? */ + check_syscall_restart(regs, &ka, signr > 0); + + if (signr <= 0) { + /* No signal to deliver -- put the saved sigmask back */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } + return 0; /* no signals delivered */ + } + +#ifdef CONFIG_PPC64 + /* + * Reenable the DABR before delivering the signal to + * user space. The DABR will have been cleared if it + * triggered inside the kernel. + */ + if (current->thread.dabr) + set_dabr(current->thread.dabr); +#endif + + if (is32) { + unsigned int newsp; + + if ((ka.sa.sa_flags & SA_ONSTACK) && + current->sas_ss_size && !on_sig_stack(regs->gpr[1])) + newsp = current->sas_ss_sp + current->sas_ss_size; + else + newsp = regs->gpr[1]; + + if (ka.sa.sa_flags & SA_SIGINFO) + ret = handle_rt_signal32(signr, &ka, &info, oldset, + regs, newsp); + else + ret = handle_signal32(signr, &ka, &info, oldset, + regs, newsp); +#ifdef CONFIG_PPC64 + } else { + ret = handle_rt_signal64(signr, &ka, &info, oldset, regs); +#endif + } + + if (ret) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked, ¤t->blocked, + &ka.sa.sa_mask); + if (!(ka.sa.sa_flags & SA_NODEFER)) + sigaddset(¤t->blocked, signr); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + /* + * A signal was successfully delivered; the saved sigmask is in + * its frame, and we can clear the TIF_RESTORE_SIGMASK flag. + */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + clear_thread_flag(TIF_RESTORE_SIGMASK); + } + + return ret; +} + long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, unsigned long r5, unsigned long r6, unsigned long r7, unsigned long r8, struct pt_regs *regs) diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h index 4b091d8b764c..190d4325f974 100644 --- a/arch/powerpc/kernel/signal.h +++ b/arch/powerpc/kernel/signal.h @@ -13,7 +13,17 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) extern void restore_sigmask(sigset_t *set); -extern void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, - int has_handler); + +extern int handle_signal32(unsigned long sig, struct k_sigaction *ka, + siginfo_t *info, sigset_t *oldset, + struct pt_regs *regs, unsigned long newsp); + +extern int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka, + siginfo_t *info, sigset_t *oldset, + struct pt_regs *regs, unsigned long newsp); + +extern int handle_rt_signal64(int signr, struct k_sigaction *ka, + siginfo_t *info, sigset_t *set, + struct pt_regs *regs); #endif /* _POWERPC_ARCH_SIGNAL_H */ diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 1d899a56fa13..32481e71d71e 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -56,7 +56,6 @@ #undef DEBUG_SIG #ifdef CONFIG_PPC64 -#define do_signal do_signal32 #define sys_sigsuspend compat_sys_sigsuspend #define sys_rt_sigsuspend compat_sys_rt_sigsuspend #define sys_rt_sigreturn compat_sys_rt_sigreturn @@ -231,8 +230,6 @@ static inline int restore_general_regs(struct pt_regs *regs, #endif /* CONFIG_PPC64 */ -int do_signal(sigset_t *oldset, struct pt_regs *regs); - /* * Atomically swap in the new signal mask, and wait for a signal. */ @@ -699,7 +696,7 @@ int compat_sys_sigaltstack(u32 __new, u32 __old, int r5, * Set up a signal frame for a "real-time" signal handler * (one which gets siginfo). */ -static int handle_rt_signal(unsigned long sig, struct k_sigaction *ka, +int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset, struct pt_regs *regs, unsigned long newsp) { @@ -990,7 +987,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx, /* * OK, we're invoking a handler */ -static int handle_signal(unsigned long sig, struct k_sigaction *ka, +int handle_signal32(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset, struct pt_regs *regs, unsigned long newsp) { @@ -1101,84 +1098,3 @@ badframe: force_sig(SIGSEGV, current); return 0; } - -/* - * Note that 'init' is a special process: it doesn't get signals it doesn't - * want to handle. Thus you cannot kill init even with a SIGKILL even by - * mistake. - */ -int do_signal(sigset_t *oldset, struct pt_regs *regs) -{ - siginfo_t info; - struct k_sigaction ka; - unsigned int newsp; - int signr, ret; - -#ifdef CONFIG_PPC32 - if (try_to_freeze()) { - signr = 0; - if (!signal_pending(current)) - goto no_signal; - } -#endif - - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - oldset = ¤t->saved_sigmask; - else if (!oldset) - oldset = ¤t->blocked; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); -#ifdef CONFIG_PPC32 -no_signal: -#endif - /* Is there any syscall restart business here ? */ - check_syscall_restart(regs, &ka, signr > 0); - - if (signr == 0) { - /* No signal to deliver -- put the saved sigmask back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } - return 0; /* no signals delivered */ - } - - if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size - && !on_sig_stack(regs->gpr[1])) - newsp = current->sas_ss_sp + current->sas_ss_size; - else - newsp = regs->gpr[1]; - newsp &= ~0xfUL; - -#ifdef CONFIG_PPC64 - /* - * Reenable the DABR before delivering the signal to - * user space. The DABR will have been cleared if it - * triggered inside the kernel. - */ - if (current->thread.dabr) - set_dabr(current->thread.dabr); -#endif - - /* Whee! Actually deliver the signal. */ - if (ka.sa.sa_flags & SA_SIGINFO) - ret = handle_rt_signal(signr, &ka, &info, oldset, regs, newsp); - else - ret = handle_signal(signr, &ka, &info, oldset, regs, newsp); - - if (ret) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka.sa.sa_mask); - if (!(ka.sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, signr); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - /* A signal was successfully delivered; the saved sigmask is in - its frame, and we can clear the TIF_RESTORE_SIGMASK flag */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - } - - return ret; -} diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 7e9c4b7e7e82..c17903cd384a 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -334,7 +334,7 @@ badframe: return 0; } -static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info, +int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { /* Handler is *really* a pointer to the function descriptor for @@ -417,87 +417,3 @@ badframe: force_sigsegv(signr, current); return 0; } - - -/* - * OK, we're invoking a handler - */ -static int handle_signal(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) -{ - int ret; - - /* Set up Signal Frame */ - ret = setup_rt_frame(sig, ka, info, oldset, regs); - - if (ret) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked,sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } - - return ret; -} - -/* - * Note that 'init' is a special process: it doesn't get signals it doesn't - * want to handle. Thus you cannot kill init even with a SIGKILL even by - * mistake. - */ -int do_signal(sigset_t *oldset, struct pt_regs *regs) -{ - siginfo_t info; - int signr; - struct k_sigaction ka; - - /* - * If the current thread is 32 bit - invoke the - * 32 bit signal handling code - */ - if (test_thread_flag(TIF_32BIT)) - return do_signal32(oldset, regs); - - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - oldset = ¤t->saved_sigmask; - else if (!oldset) - oldset = ¤t->blocked; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - - /* Is there any syscall restart business here ? */ - check_syscall_restart(regs, &ka, signr > 0); - - if (signr > 0) { - int ret; - - /* - * Reenable the DABR before delivering the signal to - * user space. The DABR will have been cleared if it - * triggered inside the kernel. - */ - if (current->thread.dabr) - set_dabr(current->thread.dabr); - - /* Whee! Actually deliver the signal. */ - ret = handle_signal(signr, &ka, &info, oldset, regs); - - /* If a signal was successfully delivered, the saved sigmask is in - its frame, and we can clear the TIF_RESTORE_SIGMASK flag */ - if (ret && test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - - return ret; - } - - /* No signal to deliver -- put the saved sigmask back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } - - return 0; -} -EXPORT_SYMBOL(do_signal);