diff options
Diffstat (limited to 'arch/score/kernel/traps.c')
| -rw-r--r-- | arch/score/kernel/traps.c | 346 |
1 files changed, 0 insertions, 346 deletions
diff --git a/arch/score/kernel/traps.c b/arch/score/kernel/traps.c deleted file mode 100644 index 12daf45369b4..000000000000 --- a/arch/score/kernel/traps.c +++ /dev/null @@ -1,346 +0,0 @@ -/* - * arch/score/kernel/traps.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/extable.h> -#include <linux/ptrace.h> -#include <linux/sched/mm.h> -#include <linux/sched/signal.h> -#include <linux/sched/debug.h> -#include <linux/mm_types.h> - -#include <asm/cacheflush.h> -#include <asm/irq.h> -#include <asm/irq_regs.h> -#include <linux/uaccess.h> - -unsigned long exception_handlers[32]; - -/* - * The architecture-independent show_stack generator - */ -void show_stack(struct task_struct *task, unsigned long *sp) -{ - int i; - long stackdata; - - sp = sp ? sp : (unsigned long *)&sp; - - printk(KERN_NOTICE "Stack: "); - i = 1; - while ((long) sp & (PAGE_SIZE - 1)) { - if (i && ((i % 8) == 0)) - printk(KERN_NOTICE "\n"); - if (i > 40) { - printk(KERN_NOTICE " ..."); - break; - } - - if (__get_user(stackdata, sp++)) { - printk(KERN_NOTICE " (Bad stack address)"); - break; - } - - printk(KERN_NOTICE " %08lx", stackdata); - i++; - } - printk(KERN_NOTICE "\n"); -} - -static void show_trace(long *sp) -{ - int i; - long addr; - - sp = sp ? sp : (long *) &sp; - - printk(KERN_NOTICE "Call Trace: "); - i = 1; - while ((long) sp & (PAGE_SIZE - 1)) { - if (__get_user(addr, sp++)) { - if (i && ((i % 6) == 0)) - printk(KERN_NOTICE "\n"); - printk(KERN_NOTICE " (Bad stack address)\n"); - break; - } - - if (kernel_text_address(addr)) { - if (i && ((i % 6) == 0)) - printk(KERN_NOTICE "\n"); - if (i > 40) { - printk(KERN_NOTICE " ..."); - break; - } - - printk(KERN_NOTICE " [<%08lx>]", addr); - i++; - } - } - printk(KERN_NOTICE "\n"); -} - -static void show_code(unsigned int *pc) -{ - long i; - - printk(KERN_NOTICE "\nCode:"); - - for (i = -3; i < 6; i++) { - unsigned long insn; - if (__get_user(insn, pc + i)) { - printk(KERN_NOTICE " (Bad address in epc)\n"); - break; - } - printk(KERN_NOTICE "%c%08lx%c", (i ? ' ' : '<'), - insn, (i ? ' ' : '>')); - } -} - -/* - * FIXME: really the generic show_regs should take a const pointer argument. - */ -void show_regs(struct pt_regs *regs) -{ - show_regs_print_info(KERN_DEFAULT); - - printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", - regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3], - regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]); - printk("r8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", - regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11], - regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]); - printk("r16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", - regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19], - regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]); - printk("r24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", - regs->regs[24], regs->regs[25], regs->regs[26], regs->regs[27], - regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]); - - printk("CEH : %08lx\n", regs->ceh); - printk("CEL : %08lx\n", regs->cel); - - printk("EMA:%08lx, epc:%08lx %s\nPSR: %08lx\nECR:%08lx\nCondition : %08lx\n", - regs->cp0_ema, regs->cp0_epc, print_tainted(), regs->cp0_psr, - regs->cp0_ecr, regs->cp0_condition); -} - -static void show_registers(struct pt_regs *regs) -{ - show_regs(regs); - printk(KERN_NOTICE "Process %s (pid: %d, stackpage=%08lx)\n", - current->comm, current->pid, (unsigned long) current); - show_stack(current_thread_info()->task, (long *) regs->regs[0]); - show_trace((long *) regs->regs[0]); - show_code((unsigned int *) regs->cp0_epc); - printk(KERN_NOTICE "\n"); -} - -void __die(const char *str, struct pt_regs *regs, const char *file, - const char *func, unsigned long line) -{ - console_verbose(); - printk("%s", str); - if (file && func) - printk(" in %s:%s, line %ld", file, func, line); - printk(":\n"); - show_registers(regs); - do_exit(SIGSEGV); -} - -void __die_if_kernel(const char *str, struct pt_regs *regs, - const char *file, const char *func, unsigned long line) -{ - if (!user_mode(regs)) - __die(str, regs, file, func, line); -} - -asmlinkage void do_adelinsn(struct pt_regs *regs) -{ - printk("do_ADE-linsn:ema:0x%08lx:epc:0x%08lx\n", - regs->cp0_ema, regs->cp0_epc); - die_if_kernel("do_ade execution Exception\n", regs); - force_sig(SIGBUS, current); -} - -asmlinkage void do_adedata(struct pt_regs *regs) -{ - const struct exception_table_entry *fixup; - fixup = search_exception_tables(regs->cp0_epc); - if (fixup) { - regs->cp0_epc = fixup->fixup; - return; - } - printk("do_ADE-data:ema:0x%08lx:epc:0x%08lx\n", - regs->cp0_ema, regs->cp0_epc); - die_if_kernel("do_ade execution Exception\n", regs); - force_sig(SIGBUS, current); -} - -asmlinkage void do_pel(struct pt_regs *regs) -{ - die_if_kernel("do_pel execution Exception", regs); - force_sig(SIGFPE, current); -} - -asmlinkage void do_cee(struct pt_regs *regs) -{ - die_if_kernel("do_cee execution Exception", regs); - force_sig(SIGFPE, current); -} - -asmlinkage void do_cpe(struct pt_regs *regs) -{ - die_if_kernel("do_cpe execution Exception", regs); - force_sig(SIGFPE, current); -} - -asmlinkage void do_be(struct pt_regs *regs) -{ - die_if_kernel("do_be execution Exception", regs); - force_sig(SIGBUS, current); -} - -asmlinkage void do_ov(struct pt_regs *regs) -{ - siginfo_t info; - - die_if_kernel("do_ov execution Exception", regs); - - info.si_code = FPE_INTOVF; - info.si_signo = SIGFPE; - info.si_errno = 0; - info.si_addr = (void *)regs->cp0_epc; - force_sig_info(SIGFPE, &info, current); -} - -asmlinkage void do_tr(struct pt_regs *regs) -{ - die_if_kernel("do_tr execution Exception", regs); - force_sig(SIGTRAP, current); -} - -asmlinkage void do_ri(struct pt_regs *regs) -{ - unsigned long epc_insn; - unsigned long epc = regs->cp0_epc; - - read_tsk_long(current, epc, &epc_insn); - if (current->thread.single_step == 1) { - if ((epc == current->thread.addr1) || - (epc == current->thread.addr2)) { - user_disable_single_step(current); - force_sig(SIGTRAP, current); - return; - } else - BUG(); - } else if ((epc_insn == BREAKPOINT32_INSN) || - ((epc_insn & 0x0000FFFF) == 0x7002) || - ((epc_insn & 0xFFFF0000) == 0x70020000)) { - force_sig(SIGTRAP, current); - return; - } else { - die_if_kernel("do_ri execution Exception", regs); - force_sig(SIGILL, current); - } -} - -asmlinkage void do_ccu(struct pt_regs *regs) -{ - die_if_kernel("do_ccu execution Exception", regs); - force_sig(SIGILL, current); -} - -asmlinkage void do_reserved(struct pt_regs *regs) -{ - /* - * Game over - no way to handle this if it ever occurs. Most probably - * caused by a new unknown cpu type or after another deadly - * hard/software error. - */ - die_if_kernel("do_reserved execution Exception", regs); - show_regs(regs); - panic("Caught reserved exception - should not happen."); -} - -/* - * NMI exception handler. - */ -void nmi_exception_handler(struct pt_regs *regs) -{ - die_if_kernel("nmi_exception_handler execution Exception", regs); - die("NMI", regs); -} - -/* Install CPU exception handler */ -void *set_except_vector(int n, void *addr) -{ - unsigned long handler = (unsigned long) addr; - unsigned long old_handler = exception_handlers[n]; - - exception_handlers[n] = handler; - return (void *)old_handler; -} - -void __init trap_init(void) -{ - int i; - - pgd_current = (unsigned long)init_mm.pgd; - /* DEBUG EXCEPTION */ - memcpy((void *)DEBUG_VECTOR_BASE_ADDR, - &debug_exception_vector, DEBUG_VECTOR_SIZE); - /* NMI EXCEPTION */ - memcpy((void *)GENERAL_VECTOR_BASE_ADDR, - &general_exception_vector, GENERAL_VECTOR_SIZE); - - /* - * Initialise exception handlers - */ - for (i = 0; i <= 31; i++) - set_except_vector(i, handle_reserved); - - set_except_vector(1, handle_nmi); - set_except_vector(2, handle_adelinsn); - set_except_vector(3, handle_tlb_refill); - set_except_vector(4, handle_tlb_invaild); - set_except_vector(5, handle_ibe); - set_except_vector(6, handle_pel); - set_except_vector(7, handle_sys); - set_except_vector(8, handle_ccu); - set_except_vector(9, handle_ri); - set_except_vector(10, handle_tr); - set_except_vector(11, handle_adedata); - set_except_vector(12, handle_adedata); - set_except_vector(13, handle_tlb_refill); - set_except_vector(14, handle_tlb_invaild); - set_except_vector(15, handle_mod); - set_except_vector(16, handle_cee); - set_except_vector(17, handle_cpe); - set_except_vector(18, handle_dbe); - flush_icache_range(DEBUG_VECTOR_BASE_ADDR, IRQ_VECTOR_BASE_ADDR); - - mmgrab(&init_mm); - current->active_mm = &init_mm; - cpu_cache_init(); -} |