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Diffstat (limited to 'arch/avr32/kernel/signal.c')
-rw-r--r--arch/avr32/kernel/signal.c298
1 files changed, 0 insertions, 298 deletions
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
deleted file mode 100644
index b80c0b3d2bab..000000000000
--- a/arch/avr32/kernel/signal.c
+++ /dev/null
@@ -1,298 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * Based on linux/arch/sh/kernel/signal.c
- * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/tracehook.h>
-
-#include <asm/uaccess.h>
-#include <asm/ucontext.h>
-#include <asm/syscalls.h>
-
-struct rt_sigframe
-{
- struct siginfo info;
- struct ucontext uc;
- unsigned long retcode;
-};
-
-static int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
-{
- int err = 0;
-
-#define COPY(x) err |= __get_user(regs->x, &sc->x)
- COPY(sr);
- COPY(pc);
- COPY(lr);
- COPY(sp);
- COPY(r12);
- COPY(r11);
- COPY(r10);
- COPY(r9);
- COPY(r8);
- COPY(r7);
- COPY(r6);
- COPY(r5);
- COPY(r4);
- COPY(r3);
- COPY(r2);
- COPY(r1);
- COPY(r0);
-#undef COPY
-
- /*
- * Don't allow anyone to pretend they're running in supervisor
- * mode or something...
- */
- err |= !valid_user_regs(regs);
-
- return err;
-}
-
-
-asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- sigset_t set;
-
- /* Always make any pending restarted system calls return -EINTR */
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
- frame = (struct rt_sigframe __user *)regs->sp;
- pr_debug("SIG return: frame = %p\n", frame);
-
- if (!access_ok(VERIFY_READ, 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(regs, &frame->uc.uc_mcontext))
- goto badframe;
-
- if (restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
- regs->pc, regs->lr, regs->sp);
-
- return regs->r12;
-
-badframe:
- force_sig(SIGSEGV, current);
- return 0;
-}
-
-static int
-setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
-{
- int err = 0;
-
-#define COPY(x) err |= __put_user(regs->x, &sc->x)
- COPY(sr);
- COPY(pc);
- COPY(lr);
- COPY(sp);
- COPY(r12);
- COPY(r11);
- COPY(r10);
- COPY(r9);
- COPY(r8);
- COPY(r7);
- COPY(r6);
- COPY(r5);
- COPY(r4);
- COPY(r3);
- COPY(r2);
- COPY(r1);
- COPY(r0);
-#undef COPY
-
- return err;
-}
-
-static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
-{
- unsigned long sp = regs->sp;
-
- if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
-
- return (void __user *)((sp - framesize) & ~3);
-}
-
-static int
-setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- int err = 0;
-
- frame = get_sigframe(ka, regs, sizeof(*frame));
- err = -EFAULT;
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
- goto out;
-
- /*
- * Set up the return code:
- *
- * mov r8, __NR_rt_sigreturn
- * scall
- *
- * Note: This will blow up since we're using a non-executable
- * stack. Better use SA_RESTORER.
- */
-#if __NR_rt_sigreturn > 127
-# error __NR_rt_sigreturn must be < 127 to fit in a short mov
-#endif
- err = __put_user(0x3008d733 | (__NR_rt_sigreturn << 20),
- &frame->retcode);
-
- err |= copy_siginfo_to_user(&frame->info, info);
-
- /* Set up the ucontext */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(NULL, &frame->uc.uc_link);
- err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
- err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-
- if (err)
- goto out;
-
- regs->r12 = sig;
- regs->r11 = (unsigned long) &frame->info;
- regs->r10 = (unsigned long) &frame->uc;
- regs->sp = (unsigned long) frame;
- if (ka->sa.sa_flags & SA_RESTORER)
- regs->lr = (unsigned long)ka->sa.sa_restorer;
- else {
- printk(KERN_NOTICE "[%s:%d] did not set SA_RESTORER\n",
- current->comm, current->pid);
- regs->lr = (unsigned long) &frame->retcode;
- }
-
- pr_debug("SIG deliver [%s:%d]: sig=%d sp=0x%lx pc=0x%lx->0x%p lr=0x%lx\n",
- current->comm, current->pid, sig, regs->sp,
- regs->pc, ka->sa.sa_handler, regs->lr);
-
- regs->pc = (unsigned long) ka->sa.sa_handler;
-
-out:
- return err;
-}
-
-static inline void setup_syscall_restart(struct pt_regs *regs)
-{
- if (regs->r12 == -ERESTART_RESTARTBLOCK)
- regs->r8 = __NR_restart_syscall;
- else
- regs->r12 = regs->r12_orig;
- regs->pc -= 2;
-}
-
-static inline void
-handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
- struct pt_regs *regs, int syscall)
-{
- int ret;
-
- /*
- * Set up the stack frame
- */
- ret = setup_rt_frame(sig, ka, info, sigmask_to_save(), regs);
-
- /*
- * Check that the resulting registers are sane
- */
- ret |= !valid_user_regs(regs);
-
- /*
- * Block the signal if we were successful.
- */
- if (ret != 0)
- force_sigsegv(sig, current);
- else
- signal_delivered(sig, info, ka, regs, 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, int syscall)
-{
- siginfo_t info;
- int signr;
- struct k_sigaction ka;
-
- /*
- * We want the common case to go fast, which is why we may in
- * certain cases get here from kernel mode. Just return
- * without doing anything if so.
- */
- if (!user_mode(regs))
- return;
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (syscall) {
- switch (regs->r12) {
- case -ERESTART_RESTARTBLOCK:
- case -ERESTARTNOHAND:
- if (signr > 0) {
- regs->r12 = -EINTR;
- break;
- }
- /* fall through */
- case -ERESTARTSYS:
- if (signr > 0 && !(ka.sa.sa_flags & SA_RESTART)) {
- regs->r12 = -EINTR;
- break;
- }
- /* fall through */
- case -ERESTARTNOINTR:
- setup_syscall_restart(regs);
- }
- }
-
- if (signr == 0) {
- /* No signal to deliver -- put the saved sigmask back */
- restore_saved_sigmask();
- return;
- }
-
- handle_signal(signr, &ka, &info, regs, syscall);
-}
-
-asmlinkage void do_notify_resume(struct pt_regs *regs, struct thread_info *ti)
-{
- int syscall = 0;
-
- if ((sysreg_read(SR) & MODE_MASK) == MODE_SUPERVISOR)
- syscall = 1;
-
- if (ti->flags & _TIF_SIGPENDING)
- do_signal(regs, syscall);
-
- if (ti->flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
-}
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