mirror of
https://github.com/DarkMatterCore/nxdumptool.git
synced 2024-10-30 07:21:46 +00:00
8f75b6b923
Affects both utilsAppendFormattedStringToBuffer() and logWriteFormattedStringToBuffer(). Fixes logging issues within both the exception handler and memory debugging code. Other changes include: * bfttf: rename BfttfFontType_Total -> BfttfFontType_Count. * config: rename "append_authoringtool_data" -> "generate_authoringtool_data". * fs_ext: update FsGameCardCertificate struct * gamecard: fix gamecardReadLotusAsicFirmwareBlob() not returning false if FS .data segment memory couldn't be retrieved; update GameCardInfo struct to reflect a recently discovered area that's not zeroed out. * mem: expand MemoryProgramSegmentType enum; define extra macros for PID buffer size and memory page type checks; force empty memory page attribute and R/X permission checks while looking for the last FS .text segment; make memory page filtering code more readable. * npdm: rename KernelCapability enums; rename entry_value -> bitmask in all KernelCapability descriptor structs. * tik: force byte-for-byte memory lookup while dumping volatile tickets. * libs: update libusbhsfs to latest commit. * codebase: add missing comments to some enums; add missing "None" and "Count" elements to some enums. "Count" entries from enums with bitmasks will only reflect the number of available bitmask values. Enums with hex values remain unchanged. * PoC builds: use EXIT_SUCCESS and EXIT_FAILURE as return values. * nxdt_rw_poc: move "end" jump label within main() to avoid a crash if utilsInitializeResources() fails; reflect changes in config.c.
231 lines
8.2 KiB
C++
231 lines
8.2 KiB
C++
/*
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* exception_handler.cpp
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*
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* Copyright (c) 2019-2020, WerWolv.
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* Copyright (c) 2020-2023, DarkMatterCore <pabloacurielz@gmail.com>.
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*
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* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
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* Loosely based on debug_helpers.cpp from EdiZon-Rewrite.
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*
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* nxdumptool 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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* nxdumptool 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 <https://www.gnu.org/licenses/>.
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*/
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#include <nxdt_utils.h>
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#include <borealis.hpp>
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/* Helper macros. */
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#define FP_MASK 0xFFFFFFFFFF000000UL
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#define STACK_TRACE_SIZE 0x20
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#define IS_HB_ADDR(x) (info.addr && info.size && (x) >= info.addr && (x) < (info.addr + info.size))
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#define EH_ADD_FMT_STR(fmt, ...) utilsAppendFormattedStringToBuffer(&exception_str, &exception_str_size, fmt, ##__VA_ARGS__)
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namespace i18n = brls::i18n; /* For getStr(). */
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using namespace i18n::literals; /* For _i18n. */
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extern bool g_borealisInitialized;
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extern "C" {
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/* Overrides for libnx weak symbols. */
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u32 __nx_applet_exit_mode = 0;
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alignas(16) u8 __nx_exception_stack[0x8000];
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u64 __nx_exception_stack_size = sizeof(__nx_exception_stack);
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}
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namespace nxdt::utils {
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static void GetHomebrewMemoryInfo(MemoryInfo *out)
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{
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if (!out)
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{
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LOG_MSG_ERROR("Invalid parameters!");
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return;
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}
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u32 p = 0;
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Result rc = 0;
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/* Find the memory region in which this function is stored. */
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/* The start of it will be the base address the homebrew was mapped to. */
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rc = svcQueryMemory(out, &p, static_cast<u64>(reinterpret_cast<uintptr_t>(&GetHomebrewMemoryInfo)));
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if (R_FAILED(rc)) LOG_MSG_ERROR("svcQueryMemory failed! (0x%X).", rc);
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}
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#if LOG_LEVEL < LOG_LEVEL_NONE
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static bool UnwindStack(u64 *out_stack_trace, u32 *out_stack_trace_size, size_t max_stack_trace_size, u64 cur_fp)
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{
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if (!out_stack_trace || !out_stack_trace_size || !max_stack_trace_size || !cur_fp)
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{
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LOG_MSG_ERROR("Invalid parameters!");
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return false;
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}
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struct StackFrame {
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u64 fp; ///< Frame Pointer (pointer to previous stack frame).
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u64 lr; ///< Link Register (return address).
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};
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*out_stack_trace_size = 0;
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u64 fp_base = (cur_fp & FP_MASK);
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for(size_t i = 0; i < max_stack_trace_size; i++)
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{
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/* Last check fixes a crash while dealing with certain stack frame addresses. */
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if (!cur_fp || (cur_fp % sizeof(u64)) || (cur_fp & FP_MASK) != fp_base) break;
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auto cur_trace = reinterpret_cast<StackFrame*>(cur_fp);
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out_stack_trace[(*out_stack_trace_size)++] = cur_trace->lr;
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cur_fp = cur_trace->fp;
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}
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return (*out_stack_trace_size > 0);
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}
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#endif /* LOG_LEVEL < LOG_LEVEL_NONE */
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static void NORETURN AbortProgramExecution(std::string str)
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{
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if (g_borealisInitialized)
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{
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/* Display crash frame and exit Borealis. */
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brls::Application::crash(str);
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while(brls::Application::mainLoop());
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} else {
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/* Print error message using console output. */
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utilsPrintConsoleError(str.c_str());
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}
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/* Clean up resources. */
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utilsCloseResources();
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/* Exit application. */
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__nx_applet_exit_mode = 1;
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exit(EXIT_FAILURE);
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__builtin_unreachable();
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}
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}
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extern "C" {
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/* libnx abort function override. */
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void diagAbortWithResult(Result res)
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{
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/* Log error. */
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LOG_MSG_ERROR("*** libnx aborted with error code: 0x%X ***", res);
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/* Abort program execution. */
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std::string crash_str = (g_borealisInitialized ? i18n::getStr("generic/libnx_abort"_i18n, res) : fmt::format("Fatal error triggered in libnx!\nError code: 0x{:08X}.", res));
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nxdt::utils::AbortProgramExecution(crash_str);
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}
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/* libnx exception handler override. */
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void __libnx_exception_handler(ThreadExceptionDump *ctx)
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{
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MemoryInfo info = {0};
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std::string error_desc_str, crash_str;
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/* Get homebrew memory info. */
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nxdt::utils::GetHomebrewMemoryInfo(&info);
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switch(ctx->error_desc)
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{
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case ThreadExceptionDesc_InstructionAbort:
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error_desc_str = "Instruction Abort";
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break;
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case ThreadExceptionDesc_MisalignedPC:
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error_desc_str = "Misaligned Program Counter";
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break;
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case ThreadExceptionDesc_MisalignedSP:
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error_desc_str = "Misaligned Stack Pointer";
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break;
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case ThreadExceptionDesc_SError:
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error_desc_str = "SError";
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break;
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case ThreadExceptionDesc_BadSVC:
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error_desc_str = "Bad SVC";
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break;
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case ThreadExceptionDesc_Trap:
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error_desc_str = "SIGTRAP";
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break;
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case ThreadExceptionDesc_Other:
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error_desc_str = "Segmentation Fault";
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break;
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default:
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error_desc_str = "Unknown";
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break;
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}
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#if LOG_LEVEL < LOG_LEVEL_NONE
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char *exception_str = NULL;
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size_t exception_str_size = 0;
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u32 stack_trace_size = 0;
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u64 stack_trace[STACK_TRACE_SIZE] = {0};
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/* Log exception type. */
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LOG_MSG_ERROR("*** Exception Triggered ***");
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EH_ADD_FMT_STR("Type: %s (0x%X)\r\n", error_desc_str.c_str(), ctx->error_desc);
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/* Log CPU registers. */
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EH_ADD_FMT_STR("Registers:");
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for(size_t i = 0; i < MAX_ELEMENTS(ctx->cpu_gprs); i++)
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{
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u64 reg = ctx->cpu_gprs[i].x;
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EH_ADD_FMT_STR("\r\n X%02lu: 0x%lX", i, reg);
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if (IS_HB_ADDR(reg)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", reg - info.addr);
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}
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EH_ADD_FMT_STR("\r\n FP: 0x%lX", ctx->fp.x);
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if (IS_HB_ADDR(ctx->fp.x)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", ctx->fp.x - info.addr);
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EH_ADD_FMT_STR("\r\n LR: 0x%lX", ctx->lr.x);
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if (IS_HB_ADDR(ctx->lr.x)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", ctx->lr.x - info.addr);
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EH_ADD_FMT_STR("\r\n SP: 0x%lX", ctx->sp.x);
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if (IS_HB_ADDR(ctx->sp.x)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", ctx->sp.x - info.addr);
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EH_ADD_FMT_STR("\r\n PC: 0x%lX", ctx->pc.x);
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if (IS_HB_ADDR(ctx->pc.x)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", ctx->pc.x - info.addr);
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EH_ADD_FMT_STR("\r\n");
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/* Unwind stack. */
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if (nxdt::utils::UnwindStack(stack_trace, &stack_trace_size, STACK_TRACE_SIZE, ctx->fp.x))
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{
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/* Log stack trace. */
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EH_ADD_FMT_STR("Stack Trace:");
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for(u32 i = 0; i < stack_trace_size; i++)
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{
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u64 addr = stack_trace[i];
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EH_ADD_FMT_STR("\r\n [%02u]: 0x%lX", stack_trace_size - i - 1, addr);
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if (IS_HB_ADDR(addr)) EH_ADD_FMT_STR(" (BASE + 0x%lX)", addr - info.addr);
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}
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EH_ADD_FMT_STR("\r\n");
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}
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/* Write log string. */
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logWriteStringToLogFile(exception_str);
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/* Free exception info string. */
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if (exception_str) free(exception_str);
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#endif /* LOG_LEVEL < LOG_LEVEL_NONE */
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/* Abort program execution. */
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crash_str = (g_borealisInitialized ? i18n::getStr("generic/exception_triggered"_i18n, error_desc_str, ctx->error_desc) : \
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fmt::format("Fatal exception triggered!\nReason: {} (0x{:X}).", error_desc_str, ctx->error_desc));
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crash_str += (fmt::format("\nPC: 0x{:X}", ctx->pc.x) + (IS_HB_ADDR(ctx->pc.x) ? fmt::format(" (BASE + 0x{:X}).", ctx->pc.x - info.addr) : "."));
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nxdt::utils::AbortProgramExecution(crash_str);
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}
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}
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