X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fcompat_signal.c;h=2bbe78a2f4b6291d969a60f8c7452cdb761f0596;hb=refs%2Fheads%2Fvserver;hp=d05d65ac96940832776685c0f8b537269bc95231;hpb=f7f1b0f1e2fbadeab12d24236000e778aa9b1ead;p=linux-2.6.git diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index d05d65ac9..2bbe78a2f 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) * @@ -11,7 +10,6 @@ * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson */ -#include #include #include #include @@ -30,6 +28,7 @@ #include #include #include +#include #include "compat_linux.h" #include "compat_ptrace.h" @@ -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; @@ -143,7 +140,7 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) break; case __SI_FAULT >> 16: err |= __get_user(tmp, &from->si_addr); - to->si_addr = (void *)(u64) (tmp & PSW32_ADDR_INSN); + to->si_addr = (void __user *)(u64) (tmp & PSW32_ADDR_INSN); break; case __SI_POLL >> 16: err |= __get_user(to->si_band, &from->si_band); @@ -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) @@ -233,12 +170,12 @@ sys32_sigaction(int sig, const struct old_sigaction32 __user *act, compat_old_sigset_t mask; if (!access_ok(VERIFY_READ, act, sizeof(*act)) || __get_user(sa_handler, &act->sa_handler) || - __get_user(sa_restorer, &act->sa_restorer)) + __get_user(sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) return -EFAULT; new_ka.sa.sa_handler = (__sighandler_t) sa_handler; new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer; - __get_user(new_ka.sa.sa_flags, &act->sa_flags); - __get_user(mask, &act->sa_mask); siginitset(&new_ka.sa.sa_mask, mask); } @@ -249,18 +186,15 @@ sys32_sigaction(int sig, const struct old_sigaction32 __user *act, sa_restorer = (unsigned long) old_ka.sa.sa_restorer; if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || __put_user(sa_handler, &oact->sa_handler) || - __put_user(sa_restorer, &oact->sa_restorer)) + __put_user(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; } -int -do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact); - asmlinkage long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact, size_t sigsetsize) @@ -338,7 +272,7 @@ sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss, err |= __get_user(kss.ss_flags, &uss->ss_flags); if (err) return -EFAULT; - kss.ss_sp = (void *) ss_sp; + kss.ss_sp = (void __user *) ss_sp; } set_fs (KERNEL_DS); @@ -461,14 +395,12 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs) goto badframe; err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp); - st.ss_sp = (void *) A((unsigned long)ss_sp); + st.ss_sp = compat_ptr(ss_sp); err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size); err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags); if (err) goto badframe; - /* It is more difficult to avoid calling this function than to - call it and ignore errors. */ set_fs (KERNEL_DS); do_sigaltstack((stack_t __user *)&st, NULL, regs->gprs[15]); set_fs (old_fs); @@ -498,7 +430,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) /* This is the X/Open sanctioned signal stack switching. */ if (ka->sa.sa_flags & SA_ONSTACK) { - if (! on_sig_stack(sp)) + if (! sas_ss_flags(sp)) sp = current->sas_ss_sp + current->sas_ss_size; } @@ -522,7 +454,7 @@ 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)); @@ -567,13 +499,14 @@ 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; @@ -617,32 +550,39 @@ 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); + ret = setup_frame32(sig, ka, oldset, regs); - if (!(ka->sa.sa_flags & SA_NODEFER)) { + if (ret == 0) { spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); - sigaddset(¤t->blocked,sig); + if (!(ka->sa.sa_flags & SA_NODEFER)) + sigaddset(¤t->blocked,sig); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); + + tracehook_report_handle_signal(sig, ka, oldset, regs); } -} + return ret; +}