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-rw-r--r--arch/score/kernel/signal.c308
1 files changed, 0 insertions, 308 deletions
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
deleted file mode 100644
index e381c8c4ff65..000000000000
--- a/arch/score/kernel/signal.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * arch/score/kernel/signal.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Chen Liqin <liqin.chen@sunplusct.com>
- * Lennox Wu <lennox.wu@sunplusct.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/uaccess.h>
-#include <linux/tracehook.h>
-
-#include <asm/cacheflush.h>
-#include <asm/syscalls.h>
-#include <asm/ucontext.h>
-
-struct rt_sigframe {
- u32 rs_ass[4]; /* argument save space */
- u32 rs_code[2]; /* signal trampoline */
- struct siginfo rs_info;
- struct ucontext rs_uc;
-};
-
-static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
-{
- int err = 0;
- unsigned long reg;
-
- reg = regs->cp0_epc; err |= __put_user(reg, &sc->sc_pc);
- err |= __put_user(regs->cp0_psr, &sc->sc_psr);
- err |= __put_user(regs->cp0_condition, &sc->sc_condition);
-
-
-#define save_gp_reg(i) { \
- reg = regs->regs[i]; \
- err |= __put_user(reg, &sc->sc_regs[i]); \
-} while (0)
- save_gp_reg(0); save_gp_reg(1); save_gp_reg(2);
- save_gp_reg(3); save_gp_reg(4); save_gp_reg(5);
- save_gp_reg(6); save_gp_reg(7); save_gp_reg(8);
- save_gp_reg(9); save_gp_reg(10); save_gp_reg(11);
- save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
- save_gp_reg(15); save_gp_reg(16); save_gp_reg(17);
- save_gp_reg(18); save_gp_reg(19); save_gp_reg(20);
- save_gp_reg(21); save_gp_reg(22); save_gp_reg(23);
- save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
- save_gp_reg(27); save_gp_reg(28); save_gp_reg(29);
-#undef save_gp_reg
-
- reg = regs->ceh; err |= __put_user(reg, &sc->sc_mdceh);
- reg = regs->cel; err |= __put_user(reg, &sc->sc_mdcel);
- err |= __put_user(regs->cp0_ecr, &sc->sc_ecr);
- err |= __put_user(regs->cp0_ema, &sc->sc_ema);
-
- return err;
-}
-
-static int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
-{
- int err = 0;
- u32 reg;
-
- err |= __get_user(regs->cp0_epc, &sc->sc_pc);
- err |= __get_user(regs->cp0_condition, &sc->sc_condition);
-
- err |= __get_user(reg, &sc->sc_mdceh);
- regs->ceh = (int) reg;
- err |= __get_user(reg, &sc->sc_mdcel);
- regs->cel = (int) reg;
-
- err |= __get_user(reg, &sc->sc_psr);
- regs->cp0_psr = (int) reg;
- err |= __get_user(reg, &sc->sc_ecr);
- regs->cp0_ecr = (int) reg;
- err |= __get_user(reg, &sc->sc_ema);
- regs->cp0_ema = (int) reg;
-
-#define restore_gp_reg(i) do { \
- err |= __get_user(reg, &sc->sc_regs[i]); \
- regs->regs[i] = reg; \
-} while (0)
- restore_gp_reg(0); restore_gp_reg(1); restore_gp_reg(2);
- restore_gp_reg(3); restore_gp_reg(4); restore_gp_reg(5);
- restore_gp_reg(6); restore_gp_reg(7); restore_gp_reg(8);
- restore_gp_reg(9); restore_gp_reg(10); restore_gp_reg(11);
- restore_gp_reg(12); restore_gp_reg(13); restore_gp_reg(14);
- restore_gp_reg(15); restore_gp_reg(16); restore_gp_reg(17);
- restore_gp_reg(18); restore_gp_reg(19); restore_gp_reg(20);
- restore_gp_reg(21); restore_gp_reg(22); restore_gp_reg(23);
- restore_gp_reg(24); restore_gp_reg(25); restore_gp_reg(26);
- restore_gp_reg(27); restore_gp_reg(28); restore_gp_reg(29);
-#undef restore_gp_reg
-
- return err;
-}
-
-/*
- * Determine which stack to use..
- */
-static void __user *get_sigframe(struct k_sigaction *ka,
- struct pt_regs *regs, size_t frame_size)
-{
- unsigned long sp;
-
- /* Default to using normal stack */
- sp = regs->regs[0];
- sp -= 32;
-
- /* This is the X/Open sanctioned signal stack switching. */
- if ((ka->sa.sa_flags & SA_ONSTACK) && (!on_sig_stack(sp)))
- sp = current->sas_ss_sp + current->sas_ss_size;
-
- return (void __user*)((sp - frame_size) & ~7);
-}
-
-asmlinkage long
-score_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- sigset_t set;
- int sig;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
- frame = (struct rt_sigframe __user *) regs->regs[0];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
- goto badframe;
-
- set_current_blocked(&set);
-
- sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
- if (sig < 0)
- goto badframe;
- else if (sig)
- force_sig(sig, current);
-
- if (restore_altstack(&frame->rs_uc.uc_stack))
- goto badframe;
- regs->is_syscall = 0;
-
- __asm__ __volatile__(
- "mv\tr0, %0\n\t"
- "la\tr8, syscall_exit\n\t"
- "br\tr8\n\t"
- : : "r" (regs) : "r8");
-
-badframe:
- force_sig(SIGSEGV, current);
-
- return 0;
-}
-
-static int setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs,
- sigset_t *set)
-{
- struct rt_sigframe __user *frame;
- int err = 0;
-
- frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- return -EFAULT;
-
- /*
- * Set up the return code ...
- *
- * li v0, __NR_rt_sigreturn
- * syscall
- */
- err |= __put_user(0x87788000 + __NR_rt_sigreturn*2,
- frame->rs_code + 0);
- err |= __put_user(0x80008002, frame->rs_code + 1);
- flush_cache_sigtramp((unsigned long) frame->rs_code);
-
- err |= copy_siginfo_to_user(&frame->rs_info, &ksig->info);
- err |= __put_user(0, &frame->rs_uc.uc_flags);
- err |= __put_user(NULL, &frame->rs_uc.uc_link);
- err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[0]);
- err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
- err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
-
- if (err)
- return -EFAULT;
-
- regs->regs[0] = (unsigned long) frame;
- regs->regs[3] = (unsigned long) frame->rs_code;
- regs->regs[4] = ksig->sig;
- regs->regs[5] = (unsigned long) &frame->rs_info;
- regs->regs[6] = (unsigned long) &frame->rs_uc;
- regs->regs[29] = (unsigned long) ksig->ka.sa.sa_handler;
- regs->cp0_epc = (unsigned long) ksig->ka.sa.sa_handler;
-
- return 0;
-}
-
-static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
- int ret;
-
- if (regs->is_syscall) {
- switch (regs->regs[4]) {
- case ERESTART_RESTARTBLOCK:
- case ERESTARTNOHAND:
- regs->regs[4] = EINTR;
- break;
- case ERESTARTSYS:
- if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
- regs->regs[4] = EINTR;
- break;
- }
- case ERESTARTNOINTR:
- regs->regs[4] = regs->orig_r4;
- regs->regs[7] = regs->orig_r7;
- regs->cp0_epc -= 8;
- }
-
- regs->is_syscall = 0;
- }
-
- /*
- * Set up the stack frame
- */
- ret = setup_rt_frame(ksig, regs, sigmask_to_save());
-
- signal_setup_done(ret, ksig, 0);
-}
-
-static void do_signal(struct pt_regs *regs)
-{
- struct ksignal ksig;
-
- /*
- * 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;
-
- if (get_signal(&ksig)) {
- /* Actually deliver the signal. */
- handle_signal(&ksig, regs);
- return;
- }
-
- if (regs->is_syscall) {
- if (regs->regs[4] == ERESTARTNOHAND ||
- regs->regs[4] == ERESTARTSYS ||
- regs->regs[4] == ERESTARTNOINTR) {
- regs->regs[4] = regs->orig_r4;
- regs->regs[7] = regs->orig_r7;
- regs->cp0_epc -= 8;
- }
-
- if (regs->regs[4] == ERESTART_RESTARTBLOCK) {
- regs->regs[27] = __NR_restart_syscall;
- regs->regs[4] = regs->orig_r4;
- regs->regs[7] = regs->orig_r7;
- regs->cp0_epc -= 8;
- }
-
- regs->is_syscall = 0; /* Don't deal with this again. */
- }
-
- /*
- * If there's no signal to deliver, we just put the saved sigmask
- * back
- */
- restore_saved_sigmask();
-}
-
-/*
- * notification of userspace execution resumption
- * - triggered by the TIF_WORK_MASK flags
- */
-asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
- __u32 thread_info_flags)
-{
- /* deal with pending signal delivery */
- if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(regs);
- if (thread_info_flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
-}