diff options
Diffstat (limited to 'src/core/arm')
-rw-r--r-- | src/core/arm/arm_interface.cpp | 201 | ||||
-rw-r--r-- | src/core/arm/arm_interface.h | 18 | ||||
-rw-r--r-- | src/core/arm/dynarmic/arm_dynarmic.cpp | 9 | ||||
-rw-r--r-- | src/core/arm/dynarmic/arm_dynarmic.h | 3 | ||||
-rw-r--r-- | src/core/arm/unicorn/arm_unicorn.cpp | 18 | ||||
-rw-r--r-- | src/core/arm/unicorn/arm_unicorn.h | 3 |
6 files changed, 211 insertions, 41 deletions
diff --git a/src/core/arm/arm_interface.cpp b/src/core/arm/arm_interface.cpp index 2223cbeed..372612c9b 100644 --- a/src/core/arm/arm_interface.cpp +++ b/src/core/arm/arm_interface.cpp @@ -2,26 +2,213 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. +#include <map> +#include <optional> +#include "common/bit_field.h" #include "common/common_types.h" #include "common/logging/log.h" #include "core/arm/arm_interface.h" +#include "core/core.h" +#include "core/loader/loader.h" #include "core/memory.h" namespace Core { -void ARM_Interface::LogBacktrace() const { - VAddr fp = GetReg(29); - VAddr lr = GetReg(30); - const VAddr sp = GetReg(13); - const VAddr pc = GetPC(); - LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", sp, pc); +namespace { + +constexpr u64 ELF_DYNAMIC_TAG_NULL = 0; +constexpr u64 ELF_DYNAMIC_TAG_STRTAB = 5; +constexpr u64 ELF_DYNAMIC_TAG_SYMTAB = 6; +constexpr u64 ELF_DYNAMIC_TAG_SYMENT = 11; + +enum class ELFSymbolType : u8 { + None = 0, + Object = 1, + Function = 2, + Section = 3, + File = 4, + Common = 5, + TLS = 6, +}; + +enum class ELFSymbolBinding : u8 { + Local = 0, + Global = 1, + Weak = 2, +}; + +enum class ELFSymbolVisibility : u8 { + Default = 0, + Internal = 1, + Hidden = 2, + Protected = 3, +}; + +struct ELFSymbol { + u32 name_index; + union { + u8 info; + + BitField<0, 4, ELFSymbolType> type; + BitField<4, 4, ELFSymbolBinding> binding; + }; + ELFSymbolVisibility visibility; + u16 sh_index; + u64 value; + u64 size; +}; +static_assert(sizeof(ELFSymbol) == 0x18, "ELFSymbol has incorrect size."); + +using Symbols = std::vector<std::pair<ELFSymbol, std::string>>; + +Symbols GetSymbols(VAddr text_offset) { + const auto mod_offset = text_offset + Memory::Read32(text_offset + 4); + + if (mod_offset < text_offset || (mod_offset & 0b11) != 0 || + Memory::Read32(mod_offset) != Common::MakeMagic('M', 'O', 'D', '0')) { + return {}; + } + + const auto dynamic_offset = Memory::Read32(mod_offset + 0x4) + mod_offset; + + VAddr string_table_offset{}; + VAddr symbol_table_offset{}; + u64 symbol_entry_size{}; + + VAddr dynamic_index = dynamic_offset; + while (true) { + const auto tag = Memory::Read64(dynamic_index); + const auto value = Memory::Read64(dynamic_index + 0x8); + dynamic_index += 0x10; + + if (tag == ELF_DYNAMIC_TAG_NULL) { + break; + } + + if (tag == ELF_DYNAMIC_TAG_STRTAB) { + string_table_offset = value; + } else if (tag == ELF_DYNAMIC_TAG_SYMTAB) { + symbol_table_offset = value; + } else if (tag == ELF_DYNAMIC_TAG_SYMENT) { + symbol_entry_size = value; + } + } + + if (string_table_offset == 0 || symbol_table_offset == 0 || symbol_entry_size == 0) { + return {}; + } + + const auto string_table_address = text_offset + string_table_offset; + const auto symbol_table_address = text_offset + symbol_table_offset; + + Symbols out; + + VAddr symbol_index = symbol_table_address; + while (symbol_index < string_table_address) { + ELFSymbol symbol{}; + Memory::ReadBlock(symbol_index, &symbol, sizeof(ELFSymbol)); + + VAddr string_offset = string_table_address + symbol.name_index; + std::string name; + for (u8 c = Memory::Read8(string_offset); c != 0; c = Memory::Read8(++string_offset)) { + name += static_cast<char>(c); + } + + symbol_index += symbol_entry_size; + out.push_back({symbol, name}); + } + + return out; +} + +std::optional<std::string> GetSymbolName(const Symbols& symbols, VAddr func_address) { + const auto iter = + std::find_if(symbols.begin(), symbols.end(), [func_address](const auto& pair) { + const auto& [symbol, name] = pair; + const auto end_address = symbol.value + symbol.size; + return func_address >= symbol.value && func_address < end_address; + }); + + if (iter == symbols.end()) { + return std::nullopt; + } + + return iter->second; +} + +} // Anonymous namespace + +constexpr u64 SEGMENT_BASE = 0x7100000000ull; + +std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const { + std::vector<BacktraceEntry> out; + + auto fp = GetReg(29); + auto lr = GetReg(30); + while (true) { - LOG_ERROR(Core_ARM, "{:016X}", lr); + out.push_back({"", 0, lr, 0}); if (!fp) { break; } lr = Memory::Read64(fp + 8) - 4; fp = Memory::Read64(fp); } + + std::map<VAddr, std::string> modules; + auto& loader{System::GetInstance().GetAppLoader()}; + if (loader.ReadNSOModules(modules) != Loader::ResultStatus::Success) { + return {}; + } + + std::map<std::string, Symbols> symbols; + for (const auto& module : modules) { + symbols.insert_or_assign(module.second, GetSymbols(module.first)); + } + + for (auto& entry : out) { + VAddr base = 0; + for (auto iter = modules.rbegin(); iter != modules.rend(); ++iter) { + const auto& module{*iter}; + if (entry.original_address >= module.first) { + entry.module = module.second; + base = module.first; + break; + } + } + + entry.offset = entry.original_address - base; + entry.address = SEGMENT_BASE + entry.offset; + + if (entry.module.empty()) + entry.module = "unknown"; + + const auto symbol_set = symbols.find(entry.module); + if (symbol_set != symbols.end()) { + const auto symbol = GetSymbolName(symbol_set->second, entry.offset); + if (symbol.has_value()) { + // TODO(DarkLordZach): Add demangling of symbol names. + entry.name = *symbol; + } + } + } + + return out; +} + +void ARM_Interface::LogBacktrace() const { + const VAddr sp = GetReg(13); + const VAddr pc = GetPC(); + LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", sp, pc); + LOG_ERROR(Core_ARM, "{:20}{:20}{:20}{:20}{}", "Module Name", "Address", "Original Address", + "Offset", "Symbol"); + LOG_ERROR(Core_ARM, ""); + + const auto backtrace = GetBacktrace(); + for (const auto& entry : backtrace) { + LOG_ERROR(Core_ARM, "{:20}{:016X} {:016X} {:016X} {}", entry.module, entry.address, + entry.original_address, entry.offset, entry.name); + } } + } // namespace Core diff --git a/src/core/arm/arm_interface.h b/src/core/arm/arm_interface.h index 978b1518f..45e94e625 100644 --- a/src/core/arm/arm_interface.h +++ b/src/core/arm/arm_interface.h @@ -5,6 +5,7 @@ #pragma once #include <array> +#include <vector> #include "common/common_types.h" namespace Common { @@ -43,13 +44,6 @@ public: /// Step CPU by one instruction virtual void Step() = 0; - /// Maps a backing memory region for the CPU - virtual void MapBackingMemory(VAddr address, std::size_t size, u8* memory, - Kernel::VMAPermission perms) = 0; - - /// Unmaps a region of memory that was previously mapped using MapBackingMemory - virtual void UnmapMemory(VAddr address, std::size_t size) = 0; - /// Clear all instruction cache virtual void ClearInstructionCache() = 0; @@ -152,6 +146,16 @@ public: /// Prepare core for thread reschedule (if needed to correctly handle state) virtual void PrepareReschedule() = 0; + struct BacktraceEntry { + std::string module; + u64 address; + u64 original_address; + u64 offset; + std::string name; + }; + + std::vector<BacktraceEntry> GetBacktrace() const; + /// fp (= r29) points to the last frame record. /// Note that this is the frame record for the *previous* frame, not the current one. /// Note we need to subtract 4 from our last read to get the proper address diff --git a/src/core/arm/dynarmic/arm_dynarmic.cpp b/src/core/arm/dynarmic/arm_dynarmic.cpp index 44307fa19..f1506b372 100644 --- a/src/core/arm/dynarmic/arm_dynarmic.cpp +++ b/src/core/arm/dynarmic/arm_dynarmic.cpp @@ -177,15 +177,6 @@ ARM_Dynarmic::ARM_Dynarmic(System& system, ExclusiveMonitor& exclusive_monitor, ARM_Dynarmic::~ARM_Dynarmic() = default; -void ARM_Dynarmic::MapBackingMemory(u64 address, std::size_t size, u8* memory, - Kernel::VMAPermission perms) { - inner_unicorn.MapBackingMemory(address, size, memory, perms); -} - -void ARM_Dynarmic::UnmapMemory(u64 address, std::size_t size) { - inner_unicorn.UnmapMemory(address, size); -} - void ARM_Dynarmic::SetPC(u64 pc) { jit->SetPC(pc); } diff --git a/src/core/arm/dynarmic/arm_dynarmic.h b/src/core/arm/dynarmic/arm_dynarmic.h index b701e97a3..504d46c68 100644 --- a/src/core/arm/dynarmic/arm_dynarmic.h +++ b/src/core/arm/dynarmic/arm_dynarmic.h @@ -23,9 +23,6 @@ public: ARM_Dynarmic(System& system, ExclusiveMonitor& exclusive_monitor, std::size_t core_index); ~ARM_Dynarmic() override; - void MapBackingMemory(VAddr address, std::size_t size, u8* memory, - Kernel::VMAPermission perms) override; - void UnmapMemory(u64 address, std::size_t size) override; void SetPC(u64 pc) override; u64 GetPC() const override; u64 GetReg(int index) const override; diff --git a/src/core/arm/unicorn/arm_unicorn.cpp b/src/core/arm/unicorn/arm_unicorn.cpp index 4e07fe8b5..97d5c2a8a 100644 --- a/src/core/arm/unicorn/arm_unicorn.cpp +++ b/src/core/arm/unicorn/arm_unicorn.cpp @@ -50,11 +50,14 @@ static void CodeHook(uc_engine* uc, uint64_t address, uint32_t size, void* user_ static bool UnmappedMemoryHook(uc_engine* uc, uc_mem_type type, u64 addr, int size, u64 value, void* user_data) { + auto* const system = static_cast<System*>(user_data); + ARM_Interface::ThreadContext ctx{}; - Core::CurrentArmInterface().SaveContext(ctx); + system->CurrentArmInterface().SaveContext(ctx); ASSERT_MSG(false, "Attempted to read from unmapped memory: 0x{:X}, pc=0x{:X}, lr=0x{:X}", addr, ctx.pc, ctx.cpu_registers[30]); - return {}; + + return false; } ARM_Unicorn::ARM_Unicorn(System& system) : system{system} { @@ -65,7 +68,7 @@ ARM_Unicorn::ARM_Unicorn(System& system) : system{system} { uc_hook hook{}; CHECKED(uc_hook_add(uc, &hook, UC_HOOK_INTR, (void*)InterruptHook, this, 0, -1)); - CHECKED(uc_hook_add(uc, &hook, UC_HOOK_MEM_INVALID, (void*)UnmappedMemoryHook, this, 0, -1)); + CHECKED(uc_hook_add(uc, &hook, UC_HOOK_MEM_INVALID, (void*)UnmappedMemoryHook, &system, 0, -1)); if (GDBStub::IsServerEnabled()) { CHECKED(uc_hook_add(uc, &hook, UC_HOOK_CODE, (void*)CodeHook, this, 0, -1)); last_bkpt_hit = false; @@ -76,15 +79,6 @@ ARM_Unicorn::~ARM_Unicorn() { CHECKED(uc_close(uc)); } -void ARM_Unicorn::MapBackingMemory(VAddr address, std::size_t size, u8* memory, - Kernel::VMAPermission perms) { - CHECKED(uc_mem_map_ptr(uc, address, size, static_cast<u32>(perms), memory)); -} - -void ARM_Unicorn::UnmapMemory(VAddr address, std::size_t size) { - CHECKED(uc_mem_unmap(uc, address, size)); -} - void ARM_Unicorn::SetPC(u64 pc) { CHECKED(uc_reg_write(uc, UC_ARM64_REG_PC, &pc)); } diff --git a/src/core/arm/unicorn/arm_unicorn.h b/src/core/arm/unicorn/arm_unicorn.h index 34e974b4d..fe2ffd70c 100644 --- a/src/core/arm/unicorn/arm_unicorn.h +++ b/src/core/arm/unicorn/arm_unicorn.h @@ -18,9 +18,6 @@ public: explicit ARM_Unicorn(System& system); ~ARM_Unicorn() override; - void MapBackingMemory(VAddr address, std::size_t size, u8* memory, - Kernel::VMAPermission perms) override; - void UnmapMemory(VAddr address, std::size_t size) override; void SetPC(u64 pc) override; u64 GetPC() const override; u64 GetReg(int index) const override; |