11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/arch/h8300/boot/traps.c -- general exception handling code 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp> 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Cloned from Linux/m68k. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * No original Copyright holder listed, 85e71c6051585da46b898b21bd8e5b6df2795f03fSimon Arlott * Probable original (C) Roman Zippel (assigned DJD, 1999) 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * License. See the file COPYING in the main directory of this archive 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 239791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato#include <linux/bug.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/traps.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/page.h> 289791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato 299791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Satostatic DEFINE_SPINLOCK(die_lock); 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this must be called very early as the kernel might 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * use some instruction that are emulated on the 060 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init base_trap_init(void) 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init trap_init (void) 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void set_esp0 (unsigned long ssp) 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->thread.esp0 = ssp; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic dumping code. Used for panic and debug. 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void dump(struct pt_regs *fp) 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long *sp; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *tp; 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\nCURRENT PROCESS:\n\n"); 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("COMM=%s PID=%d\n", current->comm, current->pid); 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (current->mm) { 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->start_code, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->end_code, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->start_data, 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->end_data, 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->end_data, 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->brk); 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) current->mm->start_stack, 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) PAGE_SIZE+(unsigned long)current); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_regs(fp); 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\nCODE:"); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tp = ((unsigned char *) fp->pc) - 0x20; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((i % 0x10) == 0) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n%08x: ", (int) (tp + i)); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%08x ", (int) *sp++); 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\nKERNEL STACK:"); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tp = ((unsigned char *) fp) - 0x40; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((i % 0x10) == 0) 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n%08x: ", (int) (tp + i)); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%08x ", (int) *sp++); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("(Possibly corrupted stack page??)\n"); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n\n"); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 98b857189d94e0d8a05943349618c4f84dbc57144cDavid Howellsvoid die(const char *str, struct pt_regs *fp, unsigned long err) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1009791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato static int diecount; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1029791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato oops_enter(); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1049791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato console_verbose(); 1059791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato spin_lock_irq(&die_lock); 1069791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato report_bug(fp->pc, fp); 1079791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++diecount); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump(fp); 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1109791af55b5edb44d89608b9934a0022e7a27f625Yoshinori Sato spin_unlock_irq(&die_lock); 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_exit(SIGSEGV); 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern char _start, _etext; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define check_kernel_text(addr) \ 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((addr >= (unsigned long)(&_start)) && \ 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (addr < (unsigned long)(&_etext))) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int kstack_depth_to_print = 24; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_stack(struct task_struct *task, unsigned long *esp) 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long *stack, addr; 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (esp == NULL) 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esp = (unsigned long *) &esp; 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack = esp; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Stack from %08lx:", (unsigned long)stack); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < kstack_depth_to_print; i++) { 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i % 8 == 0) 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n "); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" %08lx", *stack++); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\nCall Trace:"); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = 0; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack = esp; 1438778beb981b7e5df3472b05475e4c7905dad1f3dYoshinori Sato while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) { 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds addr = *stack++; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the address is either in the text segment of the 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * kernel, or in the region which contains vmalloc'ed 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * memory, it *may* be the address of a calling 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * routine; if so, print it so that someone tracing 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * down the cause of the crash will be able to figure 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * out the call path that was taken. 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (check_kernel_text(addr)) { 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i % 4 == 0) 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n "); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" [<%08lx>]", addr); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_trace_task(struct task_struct *tsk) 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_stack(tsk,(unsigned long *)tsk->thread.esp0); 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid dump_stack(void) 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_stack(NULL,NULL); 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(dump_stack); 174