aboutsummaryrefslogtreecommitdiffstats
path: root/arch/h8300/kernel/signal.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/h8300/kernel/signal.c')
-rw-r--r--arch/h8300/kernel/signal.c287
1 files changed, 0 insertions, 287 deletions
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
deleted file mode 100644
index 75a1c36b105a..000000000000
--- a/arch/h8300/kernel/signal.c
+++ /dev/null
@@ -1,287 +0,0 @@
-/*
- * linux/arch/h8300/kernel/signal.c
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * uClinux H8/300 support by Yoshinori Sato <ysato@users.sourceforge.jp>
- * and David McCullough <davidm@snapgear.com>
- *
- * Based on
- * Linux/m68k by Hamish Macdonald
- */
-
-/*
- * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
- * Atari :-) Current limitation: Only one sigstack can be active at one time.
- * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
- * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
- * signal handlers!
- */
-
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/highuid.h>
-#include <linux/personality.h>
-#include <linux/tty.h>
-#include <linux/binfmts.h>
-#include <linux/tracehook.h>
-
-#include <asm/setup.h>
-#include <linux/uaccess.h>
-#include <asm/traps.h>
-#include <asm/ucontext.h>
-
-/*
- * Do a signal return; undo the signal stack.
- *
- * Keep the return code on the stack quadword aligned!
- * That makes the cache flush below easier.
- */
-
-struct rt_sigframe {
- long dummy_er0;
- long dummy_vector;
-#if defined(CONFIG_CPU_H8S)
- short dummy_exr;
-#endif
- long dummy_pc;
- char *pretcode;
- struct siginfo *pinfo;
- void *puc;
- unsigned char retcode[8];
- struct siginfo info;
- struct ucontext uc;
- int sig;
-} __packed __aligned(2);
-
-static inline int
-restore_sigcontext(struct sigcontext *usc, int *pd0)
-{
- struct pt_regs *regs = current_pt_regs();
- int err = 0;
- unsigned int ccr;
- unsigned int usp;
- unsigned int er0;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
- /* restore passed registers */
-#define COPY(r) do { err |= get_user(regs->r, &usc->sc_##r); } while (0)
- COPY(er1);
- COPY(er2);
- COPY(er3);
- COPY(er5);
- COPY(pc);
- ccr = regs->ccr & 0x10;
- COPY(ccr);
-#undef COPY
- regs->ccr &= 0xef;
- regs->ccr |= ccr;
- regs->orig_er0 = -1; /* disable syscall checks */
- err |= __get_user(usp, &usc->sc_usp);
- regs->sp = usp;
-
- err |= __get_user(er0, &usc->sc_er0);
- *pd0 = er0;
- return err;
-}
-
-asmlinkage int sys_rt_sigreturn(void)
-{
- unsigned long usp = rdusp();
- struct rt_sigframe *frame = (struct rt_sigframe *)(usp - 4);
- sigset_t set;
- int er0;
-
- if (!access_ok(frame, sizeof(*frame)))
- goto badframe;
- if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
- goto badframe;
-
- set_current_blocked(&set);
-
- if (restore_sigcontext(&frame->uc.uc_mcontext, &er0))
- goto badframe;
-
- if (restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- return er0;
-
-badframe:
- force_sig(SIGSEGV);
- return 0;
-}
-
-static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
- unsigned long mask)
-{
- int err = 0;
-
- err |= __put_user(regs->er0, &sc->sc_er0);
- err |= __put_user(regs->er1, &sc->sc_er1);
- err |= __put_user(regs->er2, &sc->sc_er2);
- err |= __put_user(regs->er3, &sc->sc_er3);
- err |= __put_user(regs->er4, &sc->sc_er4);
- err |= __put_user(regs->er5, &sc->sc_er5);
- err |= __put_user(regs->er6, &sc->sc_er6);
- err |= __put_user(rdusp(), &sc->sc_usp);
- err |= __put_user(regs->pc, &sc->sc_pc);
- err |= __put_user(regs->ccr, &sc->sc_ccr);
- err |= __put_user(mask, &sc->sc_mask);
-
- return err;
-}
-
-static inline void __user *
-get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size)
-{
- return (void __user *)((sigsp(rdusp(), ksig) - frame_size) & -8UL);
-}
-
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
- struct pt_regs *regs)
-{
- struct rt_sigframe *frame;
- int err = 0;
- unsigned char *ret;
-
- frame = get_sigframe(ksig, regs, sizeof(*frame));
-
- if (!access_ok(frame, sizeof(*frame)))
- return -EFAULT;
-
- if (ksig->ka.sa.sa_flags & SA_SIGINFO)
- err |= copy_siginfo_to_user(&frame->info, &ksig->info);
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __save_altstack(&frame->uc.uc_stack, rdusp());
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
- err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
- if (err)
- return -EFAULT;
-
- /* Set up to return from userspace. */
- ret = (unsigned char *)&frame->retcode;
- if (ksig->ka.sa.sa_flags & SA_RESTORER)
- ret = (unsigned char *)(ksig->ka.sa.sa_restorer);
- else {
- /* sub.l er0,er0; mov.b #__NR_rt_sigreturn,r0l; trapa #0 */
- err |= __put_user(0x1a80f800 + (__NR_rt_sigreturn & 0xff),
- (unsigned long *)(frame->retcode + 0));
- err |= __put_user(0x5700,
- (unsigned short *)(frame->retcode + 4));
- }
- err |= __put_user(ret, &frame->pretcode);
-
- if (err)
- return -EFAULT;
-
- /* Set up registers for signal handler */
- regs->sp = (unsigned long)frame;
- regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
- regs->er0 = ksig->sig;
- regs->er1 = (unsigned long)&(frame->info);
- regs->er2 = (unsigned long)&frame->uc;
- regs->er5 = current->mm->start_data; /* GOT base */
-
- return 0;
-}
-
-static void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka)
-{
- switch (regs->er0) {
- case -ERESTARTNOHAND:
- if (!ka)
- goto do_restart;
- regs->er0 = -EINTR;
- break;
- case -ERESTART_RESTARTBLOCK:
- if (!ka) {
- regs->er0 = __NR_restart_syscall;
- regs->pc -= 2;
- } else
- regs->er0 = -EINTR;
- break;
- case -ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART)) {
- regs->er0 = -EINTR;
- break;
- }
- fallthrough;
- case -ERESTARTNOINTR:
-do_restart:
- regs->er0 = regs->orig_er0;
- regs->pc -= 2;
- break;
- }
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
- sigset_t *oldset = sigmask_to_save();
- int ret;
- /* are we from a system call? */
- if (regs->orig_er0 >= 0)
- handle_restart(regs, &ksig->ka);
-
- ret = setup_rt_frame(ksig, oldset, regs);
-
- signal_setup_done(ret, ksig, 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.
- */
-static void do_signal(struct pt_regs *regs)
-{
- struct ksignal ksig;
-
- current->thread.esp0 = (unsigned long) regs;
-
- if (get_signal(&ksig)) {
- /* Whee! Actually deliver the signal. */
- handle_signal(&ksig, regs);
- return;
- }
- /* Did we come from a system call? */
- if (regs->orig_er0 >= 0)
- handle_restart(regs, NULL);
-
- /* If there's no signal to deliver, we just restore the saved mask. */
- restore_saved_sigmask();
-}
-
-asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
-{
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
- do_signal(regs);
-
- if (thread_info_flags & _TIF_NOTIFY_RESUME)
- tracehook_notify_resume(regs);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.