diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/s390/kernel/compat_signal.c | 79 |
1 files changed, 35 insertions, 44 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index f204d6920368..598b0b42668b 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -320,38 +320,39 @@ static inline int map_signal(int sig) return sig; } -static int setup_frame32(int sig, struct k_sigaction *ka, - sigset_t *set, struct pt_regs * regs) +static int setup_frame32(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { - sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); + int sig = ksig->sig; + sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(sigframe32)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) - goto give_sigsegv; + return -EFAULT; if (save_sigregs32(regs, &frame->sregs)) - goto give_sigsegv; + return -EFAULT; if (save_sigregs_gprs_high(regs, frame->gprs_high)) - goto give_sigsegv; + return -EFAULT; if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE; } else { regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 __force __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (__force __u64) frame; @@ -359,7 +360,7 @@ static int setup_frame32(int sig, struct k_sigaction *ka, regs->psw.mask = PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); - regs->psw.addr = (__force __u64) ka->sa.sa_handler; + regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (__force __u64) &frame->sc; @@ -376,25 +377,21 @@ static int 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 __force __user *) &frame->signo)) - goto give_sigsegv; + return -EFAULT; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } -static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs * regs) +static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { int err = 0; - rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); + rt_sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe32)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; - if (copy_siginfo_to_user32(&frame->info, info)) - goto give_sigsegv; + if (copy_siginfo_to_user32(&frame->info, &ksig->info)) + return -EFAULT; /* Create the ucontext. */ err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); @@ -404,22 +401,22 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, err |= save_sigregs_gprs_high(regs, frame->gprs_high); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE; } else { regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 __force __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (__force __u64) frame; @@ -427,36 +424,30 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, regs->psw.mask = PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); - regs->psw.addr = (__u64 __force) ka->sa.sa_handler; + regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler; - regs->gprs[2] = map_signal(sig); + regs->gprs[2] = map_signal(ksig->sig); regs->gprs[3] = (__force __u64) &frame->info; regs->gprs[4] = (__force __u64) &frame->uc; regs->gprs[5] = task_thread_info(current)->last_break; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } /* * OK, we're invoking a handler */ -void handle_signal32(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) +void handle_signal32(struct ksignal *ksig, sigset_t *oldset, + struct pt_regs *regs) { int ret; /* Set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame32(sig, ka, info, oldset, regs); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) + ret = setup_rt_frame32(ksig, oldset, regs); else - ret = setup_frame32(sig, ka, oldset, regs); - if (ret) - return; - signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLE_STEP)); + ret = setup_frame32(ksig, oldset, regs); + + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP)); } |