From 54dfe5dd9abc547f63060d132dad2c024a47de1e Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 1 Feb 2006 03:06:38 -0800 Subject: [PATCH] s390: Add support for new syscalls/TIF_RESTORE_SIGMASK Add support for the new *at, pselect6 and ppoll system calls. This includes adding required support for TIF_RESTORE_SIGMASK. Signed-off-by: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/kernel/compat_signal.c | 102 +++++++++------------------------------ 1 file changed, 23 insertions(+), 79 deletions(-) (limited to 'arch/s390/kernel/compat_signal.c') diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index fa2b3bc22f2..ef706694a0c 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -1,8 +1,7 @@ /* - * arch/s390/kernel/signal32.c + * arch/s390/kernel/compat_signal.c * - * S390 version - * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Copyright (C) IBM Corp. 2000,2006 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) * Gerhard Tonn (ton@de.ibm.com) * @@ -52,8 +51,6 @@ typedef struct struct ucontext32 uc; } rt_sigframe32; -asmlinkage int FASTCALL(do_signal(struct pt_regs *regs, sigset_t *oldset)); - int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) { int err; @@ -161,66 +158,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) return err; } -/* - * Atomically swap in the new signal mask, and wait for a signal. - */ -asmlinkage int -sys32_sigsuspend(struct pt_regs * regs,int history0, int history1, old_sigset_t mask) -{ - sigset_t saveset; - - mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - regs->gprs[2] = -EINTR; - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - schedule(); - if (do_signal(regs, &saveset)) - return -EINTR; - } -} - -asmlinkage int -sys32_rt_sigsuspend(struct pt_regs * regs, compat_sigset_t __user *unewset, - size_t sigsetsize) -{ - sigset_t saveset, newset; - compat_sigset_t set32; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - - if (copy_from_user(&set32, unewset, sizeof(set32))) - return -EFAULT; - switch (_NSIG_WORDS) { - case 4: newset.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32); - case 3: newset.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32); - case 2: newset.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32); - case 1: newset.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32); - } - sigdelsetmask(&newset, ~_BLOCKABLE); - - spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - regs->gprs[2] = -EINTR; - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - schedule(); - if (do_signal(regs, &saveset)) - return -EINTR; - } -} - asmlinkage long sys32_sigaction(int sig, const struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) @@ -520,7 +457,7 @@ static inline int map_signal(int sig) return sig; } -static void setup_frame32(int sig, struct k_sigaction *ka, +static int setup_frame32(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) { sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); @@ -565,13 +502,14 @@ static void setup_frame32(int sig, struct k_sigaction *ka, /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) goto give_sigsegv; - return; + return 0; give_sigsegv: force_sigsegv(sig, current); + return -EFAULT; } -static void setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, +static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs * regs) { int err = 0; @@ -615,31 +553,37 @@ static void setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, regs->gprs[2] = map_signal(sig); regs->gprs[3] = (__u64) &frame->info; regs->gprs[4] = (__u64) &frame->uc; - return; + return 0; give_sigsegv: force_sigsegv(sig, current); + return -EFAULT; } /* * OK, we're invoking a handler */ -void +int handle_signal32(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset, struct pt_regs * regs) { + int ret; + /* Set up the stack frame */ if (ka->sa.sa_flags & SA_SIGINFO) - setup_rt_frame32(sig, ka, info, oldset, regs); + ret = setup_rt_frame32(sig, ka, info, oldset, regs); else - setup_frame32(sig, ka, oldset, regs); - - 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); + ret = setup_frame32(sig, ka, oldset, regs); + + if (ret == 0) { + 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; } -- cgit v1.2.3-70-g09d2