189 lines
7.9 KiB
C
189 lines
7.9 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016 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 of GPLv3 applies to this file: Requiring preservation of specified
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* reasonable legal notices or author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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*/
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#include "exceptions.h"
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#include "fs.h"
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#include "strings.h"
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#include "memory.h"
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#include "screen.h"
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#include "draw.h"
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#include "utils.h"
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#include "../build/arm9_exceptions.h"
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#include "../build/arm11_exceptions.h"
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void installArm9Handlers(void)
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{
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const u32 offsets[] = {0x08, 0x18, 0x20, 0x28};
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memcpy((void *)0x01FF8000, arm9_exceptions + 32, arm9_exceptions_size - 32);
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/* IRQHandler is at 0x08000000, but we won't handle it for some reasons
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svcHandler is at 0x08000010, but we won't handle svc either */
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for(u32 i = 0; i < 4; i++)
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{
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*(vu32 *)(0x08000000 + offsets[i]) = 0xE51FF004;
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*(vu32 *)(0x08000000 + offsets[i] + 4) = *((u32 *)arm9_exceptions + 1 + i);
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}
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}
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void installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset)
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{
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u32 *initFPU;
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for(initFPU = exceptionsPage; initFPU < (exceptionsPage + 0x400) && (initFPU[0] != 0xE59F0008 || initFPU[1] != 0xE5900000); initFPU++);
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u32 *mcuReboot;
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for(mcuReboot = exceptionsPage; mcuReboot < (exceptionsPage + 0x400) && (mcuReboot[0] != 0xE59F4104 || mcuReboot[1] != 0xE3A0A0C2); mcuReboot++);
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mcuReboot--;
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u32 *freeSpace;
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for(freeSpace = initFPU; freeSpace < (exceptionsPage + 0x400) && (freeSpace[0] != 0xFFFFFFFF || freeSpace[1] != 0xFFFFFFFF); freeSpace++);
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memcpy(freeSpace, arm11_exceptions + 32, arm11_exceptions_size - 32);
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exceptionsPage[1] = MAKE_BRANCH(exceptionsPage + 1, (u8 *)freeSpace + *(u32 *)(arm11_exceptions + 8) - 32); //Undefined Instruction
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exceptionsPage[3] = MAKE_BRANCH(exceptionsPage + 3, (u8 *)freeSpace + *(u32 *)(arm11_exceptions + 12) - 32); //Prefetch Abort
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exceptionsPage[4] = MAKE_BRANCH(exceptionsPage + 4, (u8 *)freeSpace + *(u32 *)(arm11_exceptions + 16) - 32); //Data Abort
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exceptionsPage[7] = MAKE_BRANCH(exceptionsPage + 7, (u8 *)freeSpace + *(u32 *)(arm11_exceptions + 4) - 32); //FIQ
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for(u32 *pos = freeSpace; pos < (u32 *)((u8 *)freeSpace + arm11_exceptions_size - 32); pos++)
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{
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switch(*pos) //Perform relocations
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{
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case 0xFFFF3000: *pos = stackAddress; break;
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case 0xEBFFFFFE: *pos = MAKE_BRANCH_LINK(pos, initFPU); break;
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case 0xEAFFFFFE: *pos = MAKE_BRANCH(pos, mcuReboot); break;
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case 0xE12FFF1C: pos[1] = 0xFFFF0000 + 4 * (u32)(freeSpace - exceptionsPage) + pos[1] - 32; break; //bx r12 (mainHandler)
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case 0xBEEFBEEF: *pos = codeSetOffset; break;
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default: break;
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}
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}
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}
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void detectAndProcessExceptionDumps(void)
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{
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volatile ExceptionDumpHeader *dumpHeader = (volatile ExceptionDumpHeader *)0x25000000;
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if(dumpHeader->magic[0] == 0xDEADC0DE && dumpHeader->magic[1] == 0xDEADCAFE && (dumpHeader->processor == 9 || dumpHeader->processor == 11))
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{
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vu32 *regs = (vu32 *)((vu8 *)dumpHeader + sizeof(ExceptionDumpHeader));
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vu8 *additionalData = (vu8 *)dumpHeader + dumpHeader->totalSize - dumpHeader->additionalDataSize;
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const char *handledExceptionNames[] = {
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"FIQ", "undefined instruction", "prefetch abort", "data abort"
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};
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const char *registerNames[] = {
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"R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "R10", "R11", "R12",
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"SP", "LR", "PC", "CPSR", "FPEXC"
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};
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char hexstring[] = "00000000";
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char arm11Str[] = "Processor: ARM11 (core X)";
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if(dumpHeader->processor == 11) arm11Str[29] = '0' + (char)dumpHeader->core;
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initScreens();
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drawString("An exception occurred", 10, 10, COLOR_RED);
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int posY = drawString(dumpHeader->processor == 11 ? arm11Str : "Processor: ARM9", 10, 30, COLOR_WHITE) + SPACING_Y;
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posY = drawString("Exception type: ", 10, posY, COLOR_WHITE);
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posY = drawString(handledExceptionNames[dumpHeader->type], 10 + 17 * SPACING_X, posY, COLOR_WHITE);
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if(dumpHeader->type == 2)
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{
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if((regs[16] & 0x20) == 0 && dumpHeader->codeDumpSize >= 4)
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{
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u32 instr = *(vu32 *)((vu8 *)dumpHeader + sizeof(ExceptionDumpHeader) + dumpHeader->registerDumpSize + dumpHeader->codeDumpSize - 4);
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if(instr == 0xE12FFF7E)
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posY = drawString("(kernel panic)", 10 + 32 * SPACING_X, posY, COLOR_WHITE);
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else if(instr == 0xEF00003C)
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posY = drawString("(svcBreak)", 10 + 32 * SPACING_X, posY, COLOR_WHITE);
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}
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else if((regs[16] & 0x20) == 0 && dumpHeader->codeDumpSize >= 2)
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{
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u16 instr = *(vu16 *)((vu8 *)dumpHeader + sizeof(ExceptionDumpHeader) + dumpHeader->registerDumpSize + dumpHeader->codeDumpSize - 2);
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if(instr == 0xDF3C)
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posY = drawString("(svcBreak)", 10 + 32 * SPACING_X, posY, COLOR_WHITE);
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}
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}
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if(dumpHeader->processor == 11 && dumpHeader->additionalDataSize != 0)
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{
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posY += SPACING_Y;
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char processNameStr[] = "Current process: --------";
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memcpy(processNameStr + 17, (char *)additionalData, 8);
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posY = drawString(processNameStr, 10, posY, COLOR_WHITE);
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}
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posY += 3 * SPACING_Y;
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for(u32 i = 0; i < 17; i += 2)
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{
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posY = drawString(registerNames[i], 10, posY, COLOR_WHITE);
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hexItoa(regs[i], hexstring);
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posY = drawString(hexstring, 10 + 7 * SPACING_X, posY, COLOR_WHITE);
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if(dumpHeader->processor != 9 || i != 16)
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{
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posY = drawString(registerNames[i + 1], 10 + 22 * SPACING_X, posY, COLOR_WHITE);
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hexItoa(i == 16 ? regs[20] : regs[i + 1], hexstring);
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posY = drawString(hexstring, 10 + 29 * SPACING_X, posY, COLOR_WHITE);
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}
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posY += SPACING_Y;
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}
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posY += 2 * SPACING_Y;
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u32 mode = regs[16] & 0xF;
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if(dumpHeader->type == 3 && (mode == 7 || mode == 11))
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{
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posY = drawString("Incorrect dump: failed to dump code and/or stack", 10, posY, 0x00FFFF) + 2 * SPACING_Y; //In yellow
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if(dumpHeader->processor != 9) posY -= SPACING_Y;
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}
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u32 size = dumpHeader->totalSize;
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char path[42];
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char fileName[] = "crash_dump_00000000.dmp";
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char *pathFolder = dumpHeader->processor == 9 ? "/luma/dumps/arm9" : "/luma/dumps/arm11";
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findDumpFile(pathFolder, fileName);
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memcpy(path, pathFolder, strlen(pathFolder) + 1);
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concatenateStrings(path, "/");
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concatenateStrings(path, fileName);
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if(fileWrite((void *)dumpHeader, path, size))
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{
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posY = drawString("You can find a dump in the following file:", 10, posY, COLOR_WHITE) + SPACING_Y;
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posY = drawString(path, 10, posY, COLOR_WHITE) + 2 * SPACING_Y;
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}
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else posY = drawString("Error writing the dump file", 10, posY, COLOR_RED) + SPACING_Y;
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drawString("Press any button to shutdown", 10, posY, COLOR_WHITE);
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memset32((void *)dumpHeader, 0, size);
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waitInput();
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mcuPowerOff();
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}
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} |