Fernando S
GitHub
commit
276764cfe9
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// Copyright 2022 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <map>
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#include <span>
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#include <boost/icl/interval_set.hpp>
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#include <dynarmic/interface/A64/a64.h>
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#include <dynarmic/interface/A64/config.h>
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#include "common/alignment.h"
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#include "common/common_funcs.h"
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#include "common/div_ceil.h"
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#include "common/logging/log.h"
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#include "core/hle/service/jit/jit_context.h"
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#include "core/memory.h"
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namespace Service::JIT {
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constexpr std::array<u8, 4> STOP_ARM64 = {
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0x01, 0x00, 0x00, 0xd4, // svc #0
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};
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constexpr std::array<u8, 8> RESOLVE_ARM64 = {
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0x21, 0x00, 0x00, 0xd4, // svc #1
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0xc0, 0x03, 0x5f, 0xd6, // ret
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};
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constexpr std::array<u8, 4> PANIC_ARM64 = {
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0x41, 0x00, 0x00, 0xd4, // svc #2
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};
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constexpr std::array<u8, 60> MEMMOVE_ARM64 = {
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0x1f, 0x00, 0x01, 0xeb, // cmp x0, x1
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0x83, 0x01, 0x00, 0x54, // b.lo #+34
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0x42, 0x04, 0x00, 0xd1, // sub x2, x2, 1
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0x22, 0x01, 0xf8, 0xb7, // tbnz x2, #63, #+36
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0x23, 0x68, 0x62, 0x38, // ldrb w3, [x1, x2]
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0x03, 0x68, 0x22, 0x38, // strb w3, [x0, x2]
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0xfc, 0xff, 0xff, 0x17, // b #-16
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0x24, 0x68, 0x63, 0x38, // ldrb w4, [x1, x3]
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0x04, 0x68, 0x23, 0x38, // strb w4, [x0, x3]
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0x63, 0x04, 0x00, 0x91, // add x3, x3, 1
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0x7f, 0x00, 0x02, 0xeb, // cmp x3, x2
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0x8b, 0xff, 0xff, 0x54, // b.lt #-16
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0xc0, 0x03, 0x5f, 0xd6, // ret
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0x03, 0x00, 0x80, 0xd2, // mov x3, 0
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0xfc, 0xff, 0xff, 0x17, // b #-16
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};
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constexpr std::array<u8, 28> MEMSET_ARM64 = {
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0x03, 0x00, 0x80, 0xd2, // mov x3, 0
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0x7f, 0x00, 0x02, 0xeb, // cmp x3, x2
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0x4b, 0x00, 0x00, 0x54, // b.lt #+8
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0xc0, 0x03, 0x5f, 0xd6, // ret
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0x01, 0x68, 0x23, 0x38, // strb w1, [x0, x3]
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0x63, 0x04, 0x00, 0x91, // add x3, x3, 1
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0xfb, 0xff, 0xff, 0x17, // b #-20
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};
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struct HelperFunction {
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const char* name;
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const std::span<const u8> data;
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};
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constexpr std::array<HelperFunction, 6> HELPER_FUNCTIONS{{
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{"_stop", STOP_ARM64},
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{"_resolve", RESOLVE_ARM64},
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{"_panic", PANIC_ARM64},
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{"memcpy", MEMMOVE_ARM64},
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{"memmove", MEMMOVE_ARM64},
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{"memset", MEMSET_ARM64},
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}};
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struct Elf64_Dyn {
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u64 d_tag;
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u64 d_un;
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};
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struct Elf64_Rela {
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u64 r_offset;
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u64 r_info;
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s64 r_addend;
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};
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static constexpr u32 Elf64_RelaType(const Elf64_Rela* rela) {
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return static_cast<u32>(rela->r_info);
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}
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constexpr int DT_RELA = 7; /* Address of Rela relocs */
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constexpr int DT_RELASZ = 8; /* Total size of Rela relocs */
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constexpr int R_AARCH64_RELATIVE = 1027; /* Adjust by program base. */
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constexpr size_t STACK_ALIGN = 16;
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class JITContextImpl;
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using IntervalSet = boost::icl::interval_set<VAddr>::type;
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using IntervalType = boost::icl::interval_set<VAddr>::interval_type;
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class DynarmicCallbacks64 : public Dynarmic::A64::UserCallbacks {
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public:
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explicit DynarmicCallbacks64(Core::Memory::Memory& memory_, std::vector<u8>& local_memory_,
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IntervalSet& mapped_ranges_, JITContextImpl& parent_)
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: memory{memory_}, local_memory{local_memory_},
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mapped_ranges{mapped_ranges_}, parent{parent_} {}
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u8 MemoryRead8(u64 vaddr) override {
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return ReadMemory<u8>(vaddr);
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}
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u16 MemoryRead16(u64 vaddr) override {
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return ReadMemory<u16>(vaddr);
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}
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u32 MemoryRead32(u64 vaddr) override {
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return ReadMemory<u32>(vaddr);
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}
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u64 MemoryRead64(u64 vaddr) override {
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return ReadMemory<u64>(vaddr);
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}
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u128 MemoryRead128(u64 vaddr) override {
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return ReadMemory<u128>(vaddr);
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}
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std::string MemoryReadCString(u64 vaddr) {
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std::string result;
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u8 next;
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while ((next = MemoryRead8(vaddr++)) != 0) {
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result += next;
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}
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return result;
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}
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void MemoryWrite8(u64 vaddr, u8 value) override {
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WriteMemory<u8>(vaddr, value);
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}
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void MemoryWrite16(u64 vaddr, u16 value) override {
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WriteMemory<u16>(vaddr, value);
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}
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void MemoryWrite32(u64 vaddr, u32 value) override {
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WriteMemory<u32>(vaddr, value);
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}
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void MemoryWrite64(u64 vaddr, u64 value) override {
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WriteMemory<u64>(vaddr, value);
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}
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void MemoryWrite128(u64 vaddr, u128 value) override {
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WriteMemory<u128>(vaddr, value);
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}
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bool MemoryWriteExclusive8(u64 vaddr, u8 value, u8) override {
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return WriteMemory<u8>(vaddr, value);
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}
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bool MemoryWriteExclusive16(u64 vaddr, u16 value, u16) override {
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return WriteMemory<u16>(vaddr, value);
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}
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bool MemoryWriteExclusive32(u64 vaddr, u32 value, u32) override {
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return WriteMemory<u32>(vaddr, value);
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}
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bool MemoryWriteExclusive64(u64 vaddr, u64 value, u64) override {
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return WriteMemory<u64>(vaddr, value);
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}
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bool MemoryWriteExclusive128(u64 vaddr, u128 value, u128) override {
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return WriteMemory<u128>(vaddr, value);
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}
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void CallSVC(u32 swi) override;
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void ExceptionRaised(u64 pc, Dynarmic::A64::Exception exception) override;
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void InterpreterFallback(u64 pc, size_t num_instructions) override;
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void AddTicks(u64 ticks) override {}
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u64 GetTicksRemaining() override {
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return std::numeric_limits<u32>::max();
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}
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u64 GetCNTPCT() override {
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return 0;
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}
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template <class T>
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T ReadMemory(u64 vaddr) {
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T ret{};
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if (boost::icl::contains(mapped_ranges, vaddr)) {
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memory.ReadBlock(vaddr, &ret, sizeof(T));
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} else if (vaddr + sizeof(T) > local_memory.size()) {
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LOG_CRITICAL(Service_JIT, "plugin: unmapped read @ 0x{:016x}", vaddr);
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} else {
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std::memcpy(&ret, local_memory.data() + vaddr, sizeof(T));
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}
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return ret;
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}
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template <class T>
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bool WriteMemory(u64 vaddr, const T value) {
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if (boost::icl::contains(mapped_ranges, vaddr)) {
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memory.WriteBlock(vaddr, &value, sizeof(T));
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} else if (vaddr + sizeof(T) > local_memory.size()) {
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LOG_CRITICAL(Service_JIT, "plugin: unmapped write @ 0x{:016x}", vaddr);
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} else {
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std::memcpy(local_memory.data() + vaddr, &value, sizeof(T));
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}
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return true;
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}
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private:
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Core::Memory::Memory& memory;
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std::vector<u8>& local_memory;
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IntervalSet& mapped_ranges;
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JITContextImpl& parent;
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};
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class JITContextImpl {
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public:
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explicit JITContextImpl(Core::Memory::Memory& memory_) : memory{memory_} {
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callbacks =
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std::make_unique<DynarmicCallbacks64>(memory, local_memory, mapped_ranges, *this);
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user_config.callbacks = callbacks.get();
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jit = std::make_unique<Dynarmic::A64::Jit>(user_config);
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}
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bool LoadNRO(std::span<const u8> data) {
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local_memory.clear();
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local_memory.insert(local_memory.end(), data.begin(), data.end());
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if (FixupRelocations()) {
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InsertHelperFunctions();
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InsertStack();
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return true;
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} else {
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return false;
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}
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}
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bool FixupRelocations() {
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const VAddr mod_offset{callbacks->MemoryRead32(4)};
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if (callbacks->MemoryRead32(mod_offset) != Common::MakeMagic('M', 'O', 'D', '0')) {
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return false;
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}
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VAddr dynamic_offset{mod_offset + callbacks->MemoryRead32(mod_offset + 4)};
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VAddr rela_dyn = 0;
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size_t num_rela = 0;
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while (true) {
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const auto dyn{callbacks->ReadMemory<Elf64_Dyn>(dynamic_offset)};
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dynamic_offset += sizeof(Elf64_Dyn);
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if (!dyn.d_tag) {
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break;
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}
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if (dyn.d_tag == DT_RELA) {
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rela_dyn = dyn.d_un;
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}
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if (dyn.d_tag == DT_RELASZ) {
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num_rela = dyn.d_un / sizeof(Elf64_Rela);
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}
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}
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for (size_t i = 0; i < num_rela; i++) {
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const auto rela{callbacks->ReadMemory<Elf64_Rela>(rela_dyn + i * sizeof(Elf64_Rela))};
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if (Elf64_RelaType(&rela) != R_AARCH64_RELATIVE) {
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continue;
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}
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const VAddr contents{callbacks->MemoryRead64(rela.r_offset)};
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callbacks->MemoryWrite64(rela.r_offset, contents + rela.r_addend);
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}
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return true;
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}
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void InsertHelperFunctions() {
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for (const auto& [name, contents] : HELPER_FUNCTIONS) {
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helpers[name] = local_memory.size();
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local_memory.insert(local_memory.end(), contents.begin(), contents.end());
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}
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}
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void InsertStack() {
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const u64 pad_amount{Common::AlignUp(local_memory.size(), STACK_ALIGN) -
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local_memory.size()};
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local_memory.insert(local_memory.end(), 0x10000 + pad_amount, 0);
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top_of_stack = local_memory.size();
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heap_pointer = top_of_stack;
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}
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void MapProcessMemory(VAddr dest_address, std::size_t size) {
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mapped_ranges.add(IntervalType{dest_address, dest_address + size});
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}
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void PushArgument(const void* data, size_t size) {
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const size_t num_words = Common::DivCeil(size, sizeof(u64));
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const size_t current_pos = argument_stack.size();
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argument_stack.insert(argument_stack.end(), num_words, 0);
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std::memcpy(argument_stack.data() + current_pos, data, size);
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}
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void SetupArguments() {
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for (size_t i = 0; i < 8 && i < argument_stack.size(); i++) {
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jit->SetRegister(i, argument_stack[i]);
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}
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if (argument_stack.size() > 8) {
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const VAddr new_sp = Common::AlignDown(
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top_of_stack - (argument_stack.size() - 8) * sizeof(u64), STACK_ALIGN);
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for (size_t i = 8; i < argument_stack.size(); i++) {
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callbacks->MemoryWrite64(new_sp + (i - 8) * sizeof(u64), argument_stack[i]);
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}
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jit->SetSP(new_sp);
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}
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argument_stack.clear();
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heap_pointer = top_of_stack;
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}
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u64 CallFunction(VAddr func) {
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jit->SetRegister(30, helpers["_stop"]);
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jit->SetSP(top_of_stack);
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SetupArguments();
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jit->SetPC(func);
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jit->Run();
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return jit->GetRegister(0);
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}
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VAddr GetHelper(const std::string& name) {
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return helpers[name];
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}
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VAddr AddHeap(const void* data, size_t size) {
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const size_t num_bytes{Common::AlignUp(size, STACK_ALIGN)};
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if (heap_pointer + num_bytes > local_memory.size()) {
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local_memory.insert(local_memory.end(),
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(heap_pointer + num_bytes) - local_memory.size(), 0);
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}
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const VAddr location{heap_pointer};
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std::memcpy(local_memory.data() + location, data, size);
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heap_pointer += num_bytes;
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return location;
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}
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void GetHeap(VAddr location, void* data, size_t size) {
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std::memcpy(data, local_memory.data() + location, size);
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}
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std::unique_ptr<DynarmicCallbacks64> callbacks;
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std::vector<u8> local_memory;
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std::vector<u64> argument_stack;
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IntervalSet mapped_ranges;
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Dynarmic::A64::UserConfig user_config;
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std::unique_ptr<Dynarmic::A64::Jit> jit;
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std::map<std::string, VAddr, std::less<>> helpers;
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Core::Memory::Memory& memory;
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VAddr top_of_stack;
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VAddr heap_pointer;
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};
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void DynarmicCallbacks64::CallSVC(u32 swi) {
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switch (swi) {
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case 0:
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parent.jit->HaltExecution();
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break;
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case 1: {
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// X0 contains a char* for a symbol to resolve
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std::string name{MemoryReadCString(parent.jit->GetRegister(0))};
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const auto helper{parent.helpers[name]};
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if (helper != 0) {
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parent.jit->SetRegister(0, helper);
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} else {
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LOG_WARNING(Service_JIT, "plugin requested unknown function {}", name);
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parent.jit->SetRegister(0, parent.helpers["_panic"]);
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}
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break;
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}
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case 2:
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default:
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LOG_CRITICAL(Service_JIT, "plugin panicked!");
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parent.jit->HaltExecution();
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break;
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}
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}
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void DynarmicCallbacks64::ExceptionRaised(u64 pc, Dynarmic::A64::Exception exception) {
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LOG_CRITICAL(Service_JIT, "Illegal operation PC @ {:08x}", pc);
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parent.jit->HaltExecution();
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}
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void DynarmicCallbacks64::InterpreterFallback(u64 pc, size_t num_instructions) {
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LOG_CRITICAL(Service_JIT, "Unimplemented instruction PC @ {:08x}", pc);
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parent.jit->HaltExecution();
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}
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JITContext::JITContext(Core::Memory::Memory& memory)
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: impl{std::make_unique<JITContextImpl>(memory)} {}
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JITContext::~JITContext() {}
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bool JITContext::LoadNRO(std::span<const u8> data) {
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return impl->LoadNRO(data);
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}
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void JITContext::MapProcessMemory(VAddr dest_address, std::size_t size) {
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impl->MapProcessMemory(dest_address, size);
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}
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u64 JITContext::CallFunction(VAddr func) {
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return impl->CallFunction(func);
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}
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void JITContext::PushArgument(const void* data, size_t size) {
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impl->PushArgument(data, size);
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}
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VAddr JITContext::GetHelper(const std::string& name) {
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return impl->GetHelper(name);
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}
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VAddr JITContext::AddHeap(const void* data, size_t size) {
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return impl->AddHeap(data, size);
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}
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void JITContext::GetHeap(VAddr location, void* data, size_t size) {
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impl->GetHeap(location, data, size);
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}
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} // namespace Service::JIT
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@ -0,0 +1,65 @@
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// Copyright 2022 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <span>
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#include <string>
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#include "common/common_types.h"
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namespace Core::Memory {
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class Memory;
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}
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namespace Service::JIT {
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class JITContextImpl;
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class JITContext {
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public:
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explicit JITContext(Core::Memory::Memory& memory);
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~JITContext();
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[[nodiscard]] bool LoadNRO(std::span<const u8> data);
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void MapProcessMemory(VAddr dest_address, std::size_t size);
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|
||||
template <typename T, typename... Ts>
|
||||
u64 CallFunction(VAddr func, T argument, Ts... rest) {
|
||||
static_assert(std::is_trivially_copyable_v<T>);
|
||||
PushArgument(&argument, sizeof(argument));
|
||||
|
||||
if constexpr (sizeof...(rest) > 0) {
|
||||
return CallFunction(func, rest...);
|
||||
} else {
|
||||
return CallFunction(func);
|
||||
}
|
||||
}
|
||||
|
||||
u64 CallFunction(VAddr func);
|
||||
VAddr GetHelper(const std::string& name);
|
||||
|
||||
template <typename T>
|
||||
VAddr AddHeap(T argument) {
|
||||
return AddHeap(&argument, sizeof(argument));
|
||||
}
|
||||
VAddr AddHeap(const void* data, size_t size);
|
||||
|
||||
template <typename T>
|
||||
T GetHeap(VAddr location) {
|
||||
static_assert(std::is_trivially_copyable_v<T>);
|
||||
T result;
|
||||
GetHeap(location, &result, sizeof(result));
|
||||
return result;
|
||||
}
|
||||
void GetHeap(VAddr location, void* data, size_t size);
|
||||
|
||||
private:
|
||||
std::unique_ptr<JITContextImpl> impl;
|
||||
|
||||
void PushArgument(const void* data, size_t size);
|
||||
};
|
||||
|
||||
} // namespace Service::JIT
|
||||
Loading…
Reference in New Issue