diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 170 |
1 files changed, 85 insertions, 85 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 44a46911ff98..2cc686b9f566 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -836,6 +836,91 @@ badframe: return 1; } +/* + * OK, we're invoking a handler + */ +int handle_signal32(struct ksignal *ksig, sigset_t *oldset, + struct task_struct *tsk) +{ + struct sigcontext __user *sc; + struct sigframe __user *frame; + struct mcontext __user *tm_mctx = NULL; + unsigned long newsp = 0; + int sigret; + unsigned long tramp; + struct pt_regs *regs = tsk->thread.regs; +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + /* Save the thread's msr before get_tm_stackpointer() changes it */ + unsigned long msr = regs->msr; +#endif + + /* Set up Signal Frame */ + frame = get_sigframe(ksig, tsk, sizeof(*frame), 1); + if (!access_ok(frame, sizeof(*frame))) + goto badframe; + sc = (struct sigcontext __user *) &frame->sctx; + +#if _NSIG != 64 +#error "Please adjust handle_signal()" +#endif + if (__put_user(to_user_ptr(ksig->ka.sa.sa_handler), &sc->handler) + || __put_user(oldset->sig[0], &sc->oldmask) +#ifdef CONFIG_PPC64 + || __put_user((oldset->sig[0] >> 32), &sc->_unused[3]) +#else + || __put_user(oldset->sig[1], &sc->_unused[3]) +#endif + || __put_user(to_user_ptr(&frame->mctx), &sc->regs) + || __put_user(ksig->sig, &sc->signal)) + goto badframe; + + if (vdso32_sigtramp && tsk->mm->context.vdso_base) { + sigret = 0; + tramp = tsk->mm->context.vdso_base + vdso32_sigtramp; + } else { + sigret = __NR_sigreturn; + tramp = (unsigned long) frame->mctx.tramp; + } + +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + tm_mctx = &frame->mctx_transact; + if (MSR_TM_ACTIVE(msr)) { + if (save_tm_user_regs(regs, &frame->mctx, &frame->mctx_transact, + sigret, msr)) + goto badframe; + } + else +#endif + { + if (save_user_regs(regs, &frame->mctx, tm_mctx, sigret, 1)) + goto badframe; + } + + regs->link = tramp; + +#ifdef CONFIG_PPC_FPU_REGS + tsk->thread.fp_state.fpscr = 0; /* turn off all fp exceptions */ +#endif + + /* create a stack frame for the caller of the handler */ + newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE; + if (put_user(regs->gpr[1], (u32 __user *)newsp)) + goto badframe; + + regs->gpr[1] = newsp; + regs->gpr[3] = ksig->sig; + regs->gpr[4] = (unsigned long) sc; + regs->nip = (unsigned long) (unsigned long)ksig->ka.sa.sa_handler; + /* enter the signal handler in big-endian mode */ + regs->msr &= ~MSR_LE; + return 0; + +badframe: + signal_fault(tsk, regs, "handle_signal32", frame); + + return 1; +} + static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig) { sigset_t set; @@ -1189,91 +1274,6 @@ SYSCALL_DEFINE3(debug_setcontext, struct ucontext __user *, ctx, #endif /* - * OK, we're invoking a handler - */ -int handle_signal32(struct ksignal *ksig, sigset_t *oldset, - struct task_struct *tsk) -{ - struct sigcontext __user *sc; - struct sigframe __user *frame; - struct mcontext __user *tm_mctx = NULL; - unsigned long newsp = 0; - int sigret; - unsigned long tramp; - struct pt_regs *regs = tsk->thread.regs; -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM - /* Save the thread's msr before get_tm_stackpointer() changes it */ - unsigned long msr = regs->msr; -#endif - - /* Set up Signal Frame */ - frame = get_sigframe(ksig, tsk, sizeof(*frame), 1); - if (!access_ok(frame, sizeof(*frame))) - goto badframe; - sc = (struct sigcontext __user *) &frame->sctx; - -#if _NSIG != 64 -#error "Please adjust handle_signal()" -#endif - if (__put_user(to_user_ptr(ksig->ka.sa.sa_handler), &sc->handler) - || __put_user(oldset->sig[0], &sc->oldmask) -#ifdef CONFIG_PPC64 - || __put_user((oldset->sig[0] >> 32), &sc->_unused[3]) -#else - || __put_user(oldset->sig[1], &sc->_unused[3]) -#endif - || __put_user(to_user_ptr(&frame->mctx), &sc->regs) - || __put_user(ksig->sig, &sc->signal)) - goto badframe; - - if (vdso32_sigtramp && tsk->mm->context.vdso_base) { - sigret = 0; - tramp = tsk->mm->context.vdso_base + vdso32_sigtramp; - } else { - sigret = __NR_sigreturn; - tramp = (unsigned long) frame->mctx.tramp; - } - -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM - tm_mctx = &frame->mctx_transact; - if (MSR_TM_ACTIVE(msr)) { - if (save_tm_user_regs(regs, &frame->mctx, &frame->mctx_transact, - sigret, msr)) - goto badframe; - } - else -#endif - { - if (save_user_regs(regs, &frame->mctx, tm_mctx, sigret, 1)) - goto badframe; - } - - regs->link = tramp; - -#ifdef CONFIG_PPC_FPU_REGS - tsk->thread.fp_state.fpscr = 0; /* turn off all fp exceptions */ -#endif - - /* create a stack frame for the caller of the handler */ - newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE; - if (put_user(regs->gpr[1], (u32 __user *)newsp)) - goto badframe; - - regs->gpr[1] = newsp; - regs->gpr[3] = ksig->sig; - regs->gpr[4] = (unsigned long) sc; - regs->nip = (unsigned long) (unsigned long)ksig->ka.sa.sa_handler; - /* enter the signal handler in big-endian mode */ - regs->msr &= ~MSR_LE; - return 0; - -badframe: - signal_fault(tsk, regs, "handle_signal32", frame); - - return 1; -} - -/* * Do a signal return; undo the signal stack. */ #ifdef CONFIG_PPC64 |