traps.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* traps.c: high-level exception handler for FR-V 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/user.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/linkage.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/setup.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/fpu.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/system.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/pgtable.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/siginfo.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/unaligned.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_backtrace(struct pt_regs *, unsigned long); 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern asmlinkage void __break_hijack_kernel_event(void); 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * instruction access error 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void insn_access_error(unsigned long esfr1, unsigned long epcr0, unsigned long esr0) 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Insn Access Error --\n" 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EPCR0 : %08lx\n" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR0 : %08lx\n", 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds epcr0, esr0); 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGSEGV; 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = SEGV_ACCERR; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) ((epcr0 & EPCR0_V) ? (epcr0 & EPCR0_PC) : __frame->pc); 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end insn_access_error() */ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * handler for: 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - illegal instruction 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - privileged instruction 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - unsupported trap 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - debug exceptions 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void illegal_instruction(unsigned long esfr1, unsigned long epcr0, unsigned long esr0) 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Illegal Instruction --\n" 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EPCR0 : %08lx\n" 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR0 : %08lx\n" 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESFR1 : %08lx\n", 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds epcr0, esr0, esfr1); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) ((epcr0 & EPCR0_PC) ? (epcr0 & EPCR0_PC) : __frame->pc); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (__frame->tbr & TBR_TT) { 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TBR_TT_ILLEGAL_INSTR: 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGILL; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = ILL_ILLOPC; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TBR_TT_PRIV_INSTR: 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGILL; 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = ILL_PRVOPC; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TBR_TT_TRAP2 ... TBR_TT_TRAP126: 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGILL; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = ILL_ILLTRP; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* GDB uses "tira gr0, #1" as a breakpoint instruction. */ 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TBR_TT_TRAP1: 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TBR_TT_BREAK: 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGTRAP; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (__frame->__status & REG__STATUS_STEPPED) ? TRAP_TRACE : TRAP_BRKPT; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end illegal_instruction() */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void media_exception(unsigned long msr0, unsigned long msr1) 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Media Exception --\n" 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MSR0 : %08lx\n" 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MSR1 : %08lx\n", 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msr0, msr1); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGFPE; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = FPE_MDAOVF; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) __frame->pc; 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end media_exception() */ 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * instruction or data access exception 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void memory_access_exception(unsigned long esr0, 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ear0, 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long epcr0) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_MMU 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long fixup; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((esr0 & ESRx_EC) == ESRx_EC_DATA_ACCESS) 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (handle_misalignment(esr0, ear0, epcr0) == 0) 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fixup = search_exception_table(__frame->pc)) != 0) { 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __frame->pc = fixup; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Memory Access Exception --\n" 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR0 : %08lx\n" 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EAR0 : %08lx\n" 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EPCR0 : %08lx\n", 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esr0, ear0, epcr0); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGSEGV; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = SEGV_ACCERR; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = NULL; 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((esr0 & (ESRx_VALID | ESR0_EAV)) == (ESRx_VALID | ESR0_EAV)) 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) ear0; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end memory_access_exception() */ 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * data access error 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - double-word data load from CPU control area (0xFExxxxxx) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - read performed on inactive or self-refreshing SDRAM 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - error notification from slave device 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - misaligned address 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - access to out of bounds memory region 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - user mode accessing privileged memory region 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - write to R/O memory region 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void data_access_error(unsigned long esfr1, unsigned long esr15, unsigned long ear15) 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Data Access Error --\n" 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR15 : %08lx\n" 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EAR15 : %08lx\n", 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esr15, ear15); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGSEGV; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = SEGV_ACCERR; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (((esr15 & (ESRx_VALID|ESR15_EAV)) == (ESRx_VALID|ESR15_EAV)) ? ear15 : 0); 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end data_access_error() */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * data store error - should only happen if accessing inactive or self-refreshing SDRAM 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void data_store_error(unsigned long esfr1, unsigned long esr15) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Data Store Error --\n" 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR15 : %08lx\n", 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esr15); 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG(); 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end data_store_error() */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void division_exception(unsigned long esfr1, unsigned long esr0, unsigned long isr) 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Division Exception --\n" 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR0 : %08lx\n" 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ISR : %08lx\n", 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esr0, isr); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_signo = SIGFPE; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_code = FPE_INTDIV; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_errno = 0; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info.si_addr = (void *) __frame->pc; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig_info(info.si_signo, &info, current); 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end division_exception() */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage void compound_exception(unsigned long esfr1, 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long esr0, unsigned long esr14, unsigned long esr15, 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long msr0, unsigned long msr1) 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds die_if_kernel("-- Compound Exception --\n" 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR0 : %08lx\n" 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR15 : %08lx\n" 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ESR15 : %08lx\n" 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MSR0 : %08lx\n" 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MSR1 : %08lx\n", 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esr0, esr14, esr15, msr0, msr1); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG(); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end compound_exception() */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The architecture-independent backtrace generator 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid dump_stack(void) 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_stack(NULL, NULL); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_stack(struct task_struct *task, unsigned long *sp) 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_trace_task(struct task_struct *tsk) 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("CONTEXT: stack=0x%lx frame=0x%p LR=0x%lx RET=0x%lx\n", 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsk->thread.sp, tsk->thread.frame, tsk->thread.lr, tsk->thread.sched_lr); 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char *regnames[] = { 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "PSR ", "ISR ", "CCR ", "CCCR", 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "LR ", "LCR ", "PC ", "_stt", 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "sys ", "GR8*", "GNE0", "GNE1", 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "IACH", "IACL", 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "TBR ", "SP ", "FP ", "GR3 ", 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR4 ", "GR5 ", "GR6 ", "GR7 ", 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR8 ", "GR9 ", "GR10", "GR11", 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR12", "GR13", "GR14", "GR15", 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR16", "GR17", "GR18", "GR19", 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR20", "GR21", "GR22", "GR23", 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "GR24", "GR25", "GR26", "GR27", 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "EFRM", "CURR", "GR30", "BFRM" 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_regs(struct pt_regs *regs) 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uint32_t *reg; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int loop; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Frame: @%08x [%s]\n", 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (uint32_t) regs, 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psr & PSR_S ? "kernel" : "user"); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reg = (uint32_t *) regs; 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (loop = 0; loop < REG__END; loop++) { 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s %08x", regnames[loop + 0], reg[loop + 0]); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (loop == REG__END - 1 || loop % 5 == 4) 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" | "); 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Process %s (pid: %d)\n", current->comm, current->pid); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid die_if_kernel(const char *str, ...) 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buffer[256]; 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_list va; 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (user_mode(__frame)) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_start(va, str); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vsprintf(buffer, str, va); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_end(va); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds console_verbose(); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n===================================\n"); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s\n", buffer); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_backtrace(__frame, 0); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __break_hijack_kernel_event(); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_exit(SIGSEGV); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dump the contents of an exception frame 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void show_backtrace_regs(struct pt_regs *frame) 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uint32_t *reg; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int loop; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* print the registers for this frame */ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("<-- %s Frame: @%p -->\n", 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame->psr & PSR_S ? "Kernel Mode" : "User Mode", 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reg = (uint32_t *) frame; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (loop = 0; loop < REG__END; loop++) { 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s %08x", regnames[loop + 0], reg[loop + 0]); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (loop == REG__END - 1 || loop % 5 == 4) 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" | "); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("--------\n"); 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end show_backtrace_regs() */ 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * generate a backtrace of the kernel stack 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid show_backtrace(struct pt_regs *frame, unsigned long sp) 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pt_regs *frame0; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tos = 0, stop = 0, base; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int format; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base = ((((unsigned long) frame) + 8191) & ~8191) - sizeof(struct user_context); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame0 = (struct pt_regs *) base; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sp) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tos = sp; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stop = (unsigned long) frame; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\nProcess %s (pid: %d)\n\n", current->comm, current->pid); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* dump stack segment between frames */ 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds //printk("%08lx -> %08lx\n", tos, stop); 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds format = 0; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (tos < stop) { 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (format == 0) 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" %04lx :", tos & 0xffff); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" %08lx", *(unsigned long *) tos); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tos += 4; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds format++; 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (format == 8) { 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds format = 0; 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (format > 0) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* dump frame 0 outside of the loop */ 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (frame == frame0) 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tos = frame->sp; 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (((unsigned long) frame) + sizeof(*frame) != tos) { 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("-- TOS %08lx does not follow frame %p --\n", 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tos, frame); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_backtrace_regs(frame); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* dump the stack between this frame and the next */ 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stop = (unsigned long) frame->next_frame; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (stop != base && 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (stop < tos || 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stop > base || 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (stop < base && stop + sizeof(*frame) > base) || 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stop & 3)) { 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("-- next_frame %08lx is invalid (range %08lx-%08lx) --\n", 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stop, tos, base); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* move to next frame */ 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame = frame->next_frame; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* we can always dump frame 0, even if the rest of the stack is corrupt */ 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds show_backtrace_regs(frame0); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end show_backtrace() */ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * initialise traps 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init trap_init (void) 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end trap_init() */ 432