165 lines
6.1 KiB
C
165 lines
6.1 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016-2018 Aurora Wright, TuxSH
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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 3 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 <http://www.gnu.org/licenses/>.
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*
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* Additional Terms 7.b and 7.c of GPLv3 apply to this file:
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* * Requiring preservation of specified reasonable legal notices or
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* author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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* * Prohibiting misrepresentation of the origin of that material,
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* or requiring that modified versions of such material be marked in
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* reasonable ways as different from the original version.
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*/
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#include "fatalExceptionHandlers.h"
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#include "utils.h"
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#include "kernel.h"
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#include "memory.h"
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#include "mmu.h"
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#include "globals.h"
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#define REG_DUMP_SIZE 4 * 23
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#define CODE_DUMP_SIZE 96
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// Return true if parameters are invalid
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static bool checkExceptionHandlerValidity(KProcess *process, vu32 *threadLocalStorage)
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{
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if (process == NULL)
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return true;
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u32 stackBottom = threadLocalStorage[0x11];
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u32 exceptionBuf = threadLocalStorage[0x12];
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MemoryInfo memInfo;
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PageInfo pageInfo;
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KProcessHwInfo *hwInfo = hwInfoOfProcess(process);
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u32 perm = KProcessHwInfo__GetAddressUserPerm(hwInfo, threadLocalStorage[0x10]);
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if (stackBottom != 1)
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{
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if (KProcessHwInfo__QueryMemory(hwInfo, &memInfo, &pageInfo, (void *)stackBottom)
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|| (memInfo.permissions & MEMPERM_RW) != MEMPERM_RW)
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return true;
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}
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if (exceptionBuf > 1)
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{
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if (KProcessHwInfo__QueryMemory(hwInfo, &memInfo, &pageInfo, (void *)exceptionBuf)
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|| (memInfo.permissions & MEMPERM_RW) != MEMPERM_RW)
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return true;
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}
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return (perm & MEMPERM_RX) != MEMPERM_RX;
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}
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bool isExceptionFatal(u32 spsr, u32 *regs, u32 index)
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{
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if(CONFIG(DISABLEARM11EXCHANDLERS)) return false;
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if((spsr & 0x1F) != 0x10) return true;
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KThread *thread = currentCoreContext->objectContext.currentThread;
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KProcess *currentProcess = currentCoreContext->objectContext.currentProcess;
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if(thread != NULL && thread->threadLocalStorage != NULL && *((vu32 *)thread->threadLocalStorage + 0x10) != 0)
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return checkExceptionHandlerValidity(currentProcess, (vu32 *)thread->threadLocalStorage);
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if(currentProcess != NULL)
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{
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if(debugOfProcess(currentProcess) != NULL)
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return false;
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thread = KPROCESS_GET_RVALUE(currentProcess, mainThread);
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if(thread != NULL && thread->threadLocalStorage != NULL && *((vu32 *)thread->threadLocalStorage + 0x10) != 0)
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return checkExceptionHandlerValidity(currentProcess, thread->threadLocalStorage);
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if(index == 3 && strcmp(codeSetOfProcess(currentProcess)->processName, "menu") == 0 && // workaround a Home Menu bug leading to a dabort
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regs[0] == 0x3FFF && regs[2] == 0 && regs[5] == 2 && regs[7] == 1)
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return false;
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}
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return true;
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}
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extern u32 safecpy_sz;
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bool isDataAbortExceptionRangeControlled(u32 spsr, u32 addr)
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{
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return (!(spsr & 0x20) && (spsr & 0x1F) != 0x10) && (
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((u32)kernelUsrCopyFuncsStart <= addr && addr < (u32)kernelUsrCopyFuncsEnd) ||
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((u32)safecpy <= addr && addr < (u32)safecpy + safecpy_sz)
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);
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}
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void fatalExceptionHandlersMain(u32 *registerDump, u32 type, u32 cpuId)
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{
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ExceptionDumpHeader dumpHeader;
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u8 codeDump[CODE_DUMP_SIZE];
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u8 *finalBuffer = (u8 *)PA_PTR(0x25000000);
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u8 *final = finalBuffer;
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dumpHeader.magic[0] = 0xDEADC0DE;
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dumpHeader.magic[1] = 0xDEADCAFE;
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dumpHeader.versionMajor = 1;
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dumpHeader.versionMinor = 2;
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dumpHeader.processor = 11;
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dumpHeader.core = cpuId & 0xF;
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dumpHeader.type = type;
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dumpHeader.registerDumpSize = REG_DUMP_SIZE;
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dumpHeader.codeDumpSize = CODE_DUMP_SIZE;
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u32 cpsr = registerDump[16];
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u32 pc = registerDump[15] - (type < 3 ? (((cpsr & 0x20) != 0 && type == 1) ? 2 : 4) : 8);
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registerDump[15] = pc;
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//Dump code
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u8 *instr = (u8 *)pc + ((cpsr & 0x20) ? 2 : 4) - (dumpHeader.codeDumpSize >> 1) ; //wouldn't work well on 32-bit Thumb instructions, but it isn't much of a problem
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dumpHeader.codeDumpSize = ((u32)instr & (((cpsr & 0x20) != 0) ? 1 : 3)) != 0 ? 0 : safecpy(codeDump, instr, dumpHeader.codeDumpSize);
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//Copy register dump and code dump
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final = (u8 *)(finalBuffer + sizeof(ExceptionDumpHeader));
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memcpy(final, registerDump, dumpHeader.registerDumpSize);
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final += dumpHeader.registerDumpSize;
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memcpy(final, codeDump, dumpHeader.codeDumpSize);
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final += dumpHeader.codeDumpSize;
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//Dump stack in place
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dumpHeader.stackDumpSize = safecpy(final, (const void *)registerDump[13], 0x1000 - (registerDump[13] & 0xFFF));
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final += dumpHeader.stackDumpSize;
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if(currentCoreContext->objectContext.currentProcess)
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{
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vu64 *additionalData = (vu64 *)final;
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KCodeSet *currentCodeSet = codeSetOfProcess(currentCoreContext->objectContext.currentProcess);
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if(currentCodeSet != NULL)
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{
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dumpHeader.additionalDataSize = 16;
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memcpy((void *)additionalData, currentCodeSet->processName, 8);
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additionalData[1] = currentCodeSet->titleId;
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}
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else dumpHeader.additionalDataSize = 0;
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}
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else dumpHeader.additionalDataSize = 0;
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dumpHeader.totalSize = sizeof(ExceptionDumpHeader) + dumpHeader.registerDumpSize + dumpHeader.codeDumpSize + dumpHeader.stackDumpSize + dumpHeader.additionalDataSize;
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//Copy header (actually optimized by the compiler)
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*(ExceptionDumpHeader *)finalBuffer = dumpHeader;
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}
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