mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
0402c91af9
modified: arch/score/include/asm/cacheflush.h modified: arch/score/include/asm/delay.h modified: arch/score/include/asm/errno.h modified: arch/score/include/asm/pgtable-bits.h modified: arch/score/include/asm/pgtable.h modified: arch/score/include/asm/ptrace.h modified: arch/score/include/asm/unistd.h modified: arch/score/kernel/entry.S modified: arch/score/kernel/process.c modified: arch/score/kernel/ptrace.c modified: arch/score/kernel/signal.c modified: arch/score/kernel/sys_score.c modified: arch/score/kernel/traps.c modified: arch/score/mm/cache.c Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
350 lines
8.9 KiB
C
350 lines
8.9 KiB
C
/*
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* arch/score/kernel/traps.c
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Chen Liqin <liqin.chen@sunplusct.com>
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* Lennox Wu <lennox.wu@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <asm/cacheflush.h>
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#include <asm/irq.h>
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#include <asm/irq_regs.h>
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unsigned long exception_handlers[32];
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/*
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* The architecture-independent show_stack generator
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*/
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void show_stack(struct task_struct *task, unsigned long *sp)
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{
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int i;
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long stackdata;
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sp = sp ? sp : (unsigned long *)&sp;
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printk(KERN_NOTICE "Stack: ");
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i = 1;
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while ((long) sp & (PAGE_SIZE - 1)) {
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if (i && ((i % 8) == 0))
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printk(KERN_NOTICE "\n");
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if (i > 40) {
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printk(KERN_NOTICE " ...");
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break;
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}
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if (__get_user(stackdata, sp++)) {
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printk(KERN_NOTICE " (Bad stack address)");
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break;
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}
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printk(KERN_NOTICE " %08lx", stackdata);
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i++;
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}
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printk(KERN_NOTICE "\n");
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}
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static void show_trace(long *sp)
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{
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int i;
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long addr;
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sp = sp ? sp : (long *) &sp;
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printk(KERN_NOTICE "Call Trace: ");
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i = 1;
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while ((long) sp & (PAGE_SIZE - 1)) {
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if (__get_user(addr, sp++)) {
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if (i && ((i % 6) == 0))
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printk(KERN_NOTICE "\n");
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printk(KERN_NOTICE " (Bad stack address)\n");
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break;
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}
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if (kernel_text_address(addr)) {
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if (i && ((i % 6) == 0))
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printk(KERN_NOTICE "\n");
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if (i > 40) {
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printk(KERN_NOTICE " ...");
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break;
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}
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printk(KERN_NOTICE " [<%08lx>]", addr);
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i++;
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}
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}
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printk(KERN_NOTICE "\n");
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}
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static void show_code(unsigned int *pc)
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{
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long i;
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printk(KERN_NOTICE "\nCode:");
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for (i = -3; i < 6; i++) {
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unsigned long insn;
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if (__get_user(insn, pc + i)) {
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printk(KERN_NOTICE " (Bad address in epc)\n");
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break;
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}
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printk(KERN_NOTICE "%c%08lx%c", (i ? ' ' : '<'),
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insn, (i ? ' ' : '>'));
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}
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}
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/*
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* FIXME: really the generic show_regs should take a const pointer argument.
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*/
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void show_regs(struct pt_regs *regs)
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{
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printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
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regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3],
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regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
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printk("r8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
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regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11],
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regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]);
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printk("r16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
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regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19],
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regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]);
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printk("r24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
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regs->regs[24], regs->regs[25], regs->regs[26], regs->regs[27],
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regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]);
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printk("CEH : %08lx\n", regs->ceh);
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printk("CEL : %08lx\n", regs->cel);
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printk("EMA:%08lx, epc:%08lx %s\nPSR: %08lx\nECR:%08lx\nCondition : %08lx\n",
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regs->cp0_ema, regs->cp0_epc, print_tainted(), regs->cp0_psr,
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regs->cp0_ecr, regs->cp0_condition);
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}
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static void show_registers(struct pt_regs *regs)
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{
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show_regs(regs);
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printk(KERN_NOTICE "Process %s (pid: %d, stackpage=%08lx)\n",
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current->comm, current->pid, (unsigned long) current);
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show_stack(current_thread_info()->task, (long *) regs->regs[0]);
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show_trace((long *) regs->regs[0]);
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show_code((unsigned int *) regs->cp0_epc);
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printk(KERN_NOTICE "\n");
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}
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/*
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* The architecture-independent dump_stack generator
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*/
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void dump_stack(void)
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{
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show_stack(current_thread_info()->task,
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(long *) get_irq_regs()->regs[0]);
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}
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EXPORT_SYMBOL(dump_stack);
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void __die(const char *str, struct pt_regs *regs, const char *file,
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const char *func, unsigned long line)
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{
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console_verbose();
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printk("%s", str);
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if (file && func)
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printk(" in %s:%s, line %ld", file, func, line);
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printk(":\n");
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show_registers(regs);
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do_exit(SIGSEGV);
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}
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void __die_if_kernel(const char *str, struct pt_regs *regs,
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const char *file, const char *func, unsigned long line)
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{
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if (!user_mode(regs))
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__die(str, regs, file, func, line);
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}
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asmlinkage void do_adelinsn(struct pt_regs *regs)
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{
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printk("do_ADE-linsn:ema:0x%08lx:epc:0x%08lx\n",
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regs->cp0_ema, regs->cp0_epc);
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die_if_kernel("do_ade execution Exception\n", regs);
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force_sig(SIGBUS, current);
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}
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asmlinkage void do_adedata(struct pt_regs *regs)
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{
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const struct exception_table_entry *fixup;
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fixup = search_exception_tables(regs->cp0_epc);
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if (fixup) {
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regs->cp0_epc = fixup->fixup;
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return;
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}
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printk("do_ADE-data:ema:0x%08lx:epc:0x%08lx\n",
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regs->cp0_ema, regs->cp0_epc);
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die_if_kernel("do_ade execution Exception\n", regs);
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force_sig(SIGBUS, current);
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}
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asmlinkage void do_pel(struct pt_regs *regs)
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{
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die_if_kernel("do_pel execution Exception", regs);
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force_sig(SIGFPE, current);
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}
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asmlinkage void do_cee(struct pt_regs *regs)
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{
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die_if_kernel("do_cee execution Exception", regs);
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force_sig(SIGFPE, current);
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}
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asmlinkage void do_cpe(struct pt_regs *regs)
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{
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die_if_kernel("do_cpe execution Exception", regs);
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force_sig(SIGFPE, current);
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}
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asmlinkage void do_be(struct pt_regs *regs)
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{
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die_if_kernel("do_be execution Exception", regs);
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force_sig(SIGBUS, current);
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}
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asmlinkage void do_ov(struct pt_regs *regs)
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{
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siginfo_t info;
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die_if_kernel("do_ov execution Exception", regs);
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info.si_code = FPE_INTOVF;
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info.si_signo = SIGFPE;
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info.si_errno = 0;
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info.si_addr = (void *)regs->cp0_epc;
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force_sig_info(SIGFPE, &info, current);
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}
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asmlinkage void do_tr(struct pt_regs *regs)
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{
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die_if_kernel("do_tr execution Exception", regs);
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force_sig(SIGTRAP, current);
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}
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asmlinkage void do_ri(struct pt_regs *regs)
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{
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unsigned long epc_insn;
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unsigned long epc = regs->cp0_epc;
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read_tsk_long(current, epc, &epc_insn);
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if (current->thread.single_step == 1) {
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if ((epc == current->thread.addr1) ||
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(epc == current->thread.addr2)) {
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user_disable_single_step(current);
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force_sig(SIGTRAP, current);
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return;
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} else
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BUG();
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} else if ((epc_insn == BREAKPOINT32_INSN) ||
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((epc_insn & 0x0000FFFF) == 0x7002) ||
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((epc_insn & 0xFFFF0000) == 0x70020000)) {
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force_sig(SIGTRAP, current);
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return;
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} else {
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die_if_kernel("do_ri execution Exception", regs);
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force_sig(SIGILL, current);
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}
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}
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asmlinkage void do_ccu(struct pt_regs *regs)
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{
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die_if_kernel("do_ccu execution Exception", regs);
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force_sig(SIGILL, current);
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}
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asmlinkage void do_reserved(struct pt_regs *regs)
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{
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/*
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* Game over - no way to handle this if it ever occurs. Most probably
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* caused by a new unknown cpu type or after another deadly
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* hard/software error.
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*/
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die_if_kernel("do_reserved execution Exception", regs);
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show_regs(regs);
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panic("Caught reserved exception - should not happen.");
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}
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/*
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* NMI exception handler.
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*/
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void nmi_exception_handler(struct pt_regs *regs)
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{
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die_if_kernel("nmi_exception_handler execution Exception", regs);
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die("NMI", regs);
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}
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/* Install CPU exception handler */
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void *set_except_vector(int n, void *addr)
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{
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unsigned long handler = (unsigned long) addr;
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unsigned long old_handler = exception_handlers[n];
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exception_handlers[n] = handler;
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return (void *)old_handler;
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}
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void __init trap_init(void)
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{
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int i;
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pgd_current = (unsigned long)init_mm.pgd;
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/* DEBUG EXCEPTION */
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memcpy((void *)DEBUG_VECTOR_BASE_ADDR,
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&debug_exception_vector, DEBUG_VECTOR_SIZE);
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/* NMI EXCEPTION */
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memcpy((void *)GENERAL_VECTOR_BASE_ADDR,
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&general_exception_vector, GENERAL_VECTOR_SIZE);
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/*
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* Initialise exception handlers
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*/
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for (i = 0; i <= 31; i++)
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set_except_vector(i, handle_reserved);
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set_except_vector(1, handle_nmi);
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set_except_vector(2, handle_adelinsn);
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set_except_vector(3, handle_tlb_refill);
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set_except_vector(4, handle_tlb_invaild);
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set_except_vector(5, handle_ibe);
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set_except_vector(6, handle_pel);
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set_except_vector(7, handle_sys);
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set_except_vector(8, handle_ccu);
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set_except_vector(9, handle_ri);
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set_except_vector(10, handle_tr);
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set_except_vector(11, handle_adedata);
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set_except_vector(12, handle_adedata);
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set_except_vector(13, handle_tlb_refill);
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set_except_vector(14, handle_tlb_invaild);
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set_except_vector(15, handle_mod);
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set_except_vector(16, handle_cee);
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set_except_vector(17, handle_cpe);
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set_except_vector(18, handle_dbe);
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flush_icache_range(DEBUG_VECTOR_BASE_ADDR, IRQ_VECTOR_BASE_ADDR);
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atomic_inc(&init_mm.mm_count);
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current->active_mm = &init_mm;
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cpu_cache_init();
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}
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