mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-10-14 23:10:33 +02:00
Henrik RydgårdandClaude Opus 5.5
0a8ec4d8f1
Helper thread stubs, fake syscall stubs and the module start trampoline go into memory that may have held code (freed kernel memory, a reused thread stack), and the debugger memory views can edit code. Invalidate what they write, which so far only happened by accident when the write hit the first instruction of a JIT block. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
// Copyright (c) 2014- PPSSPP Project.
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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, version 2.0 or later versions.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "Common/Serialize/Serializer.h"
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#include "Common/Serialize/SerializeFuncs.h"
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#include "Core/MemMapHelpers.h"
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#include "Core/HLE/HLE.h"
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#include "Core/HLE/ErrorCodes.h"
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#include "Core/HLE/HLEHelperThread.h"
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#include "Core/HLE/KernelWaitHelpers.h"
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#include "Core/HLE/sceKernelThread.h"
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#include "Core/HLE/sceKernelMemory.h"
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#include "Core/MIPS/MIPS.h"
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#include "Core/MIPS/MIPSCodeUtils.h"
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HLEHelperThread::HLEHelperThread(const char *threadName, const u32 instructions[], u32 instrCount, u32 prio, int stacksize) {
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u32 instrBytes = instrCount * sizeof(u32);
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u32 totalBytes = instrBytes + sizeof(u32) * 2;
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AllocEntry(totalBytes);
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_dbg_assert_(Memory::IsValid4AlignedAddress(entry_)); // after AllocEntry.
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Memory::Memcpy(entry_, instructions, instrBytes, "HelperMIPS");
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// Just to simplify things, we add the return here.
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Memory::WriteUnchecked_U32(MIPS_MAKE_JR_RA(), entry_ + instrBytes + 0);
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Memory::WriteUnchecked_U32(MIPS_MAKE_NOP(), entry_ + instrBytes + 4);
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// The memory may have held another helper's code, already compiled.
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currentMIPS->InvalidateICacheRangeDeferred(entry_, totalBytes);
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Create(threadName, prio, stacksize);
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}
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HLEHelperThread::HLEHelperThread(const char *threadName, const char *module, const char *func, u32 prio, int stacksize) {
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const u32 bytes = sizeof(u32) * 2;
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AllocEntry(bytes);
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_dbg_assert_(Memory::IsValid4AlignedAddress(entry_)); // after AllocEntry.
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Memory::WriteUnchecked_U32(MIPS_MAKE_JR_RA(), entry_ + 0);
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Memory::WriteUnchecked_U32(MIPS_MAKE_SYSCALL(module, func), entry_ + 4);
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currentMIPS->InvalidateICacheRangeDeferred(entry_, bytes);
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Create(threadName, prio, stacksize);
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}
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HLEHelperThread::~HLEHelperThread() {
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if (id_ > 0)
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__KernelDeleteThread(id_, SCE_KERNEL_ERROR_THREAD_TERMINATED, "helper deleted");
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if (entry_)
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kernelMemory.Free(entry_);
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}
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void HLEHelperThread::AllocEntry(u32 size) {
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entry_ = kernelMemory.Alloc(size, false, "HLEHelper");
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_dbg_assert_(Memory::IsValid4AlignedAddress(entry_)); // after AllocEntry.
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Memory::Memset(entry_, 0, size, "HLEHelperClear");
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currentMIPS->InvalidateICacheRangeDeferred(entry_, size);
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}
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void HLEHelperThread::Create(const char *threadName, u32 prio, int stacksize) {
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id_ = __KernelCreateThreadInternal(threadName, __KernelGetCurThreadModuleId(), entry_, prio, stacksize, 0x00001000);
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}
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void HLEHelperThread::DoState(PointerWrap &p) {
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auto s = p.Section("HLEHelperThread", 1);
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if (!s) {
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return;
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}
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Do(p, id_);
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Do(p, entry_);
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}
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void HLEHelperThread::Start(u32 a0, u32 a1) {
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__KernelStartThread(id_, a0, a1, true);
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}
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void HLEHelperThread::Terminate() {
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__KernelStopThread(id_, SCE_KERNEL_ERROR_THREAD_TERMINATED, "helper terminated");
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}
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bool HLEHelperThread::Stopped() {
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return KernelIsThreadDormant(id_);
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}
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void HLEHelperThread::ChangePriority(u32 prio) {
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KernelChangeThreadPriority(id_, prio);
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}
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void HLEHelperThread::Resume(WaitType waitType, SceUID uid, int result) {
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bool res = HLEKernel::ResumeFromWait(id_, waitType, uid, result);
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if (!res) {
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ERROR_LOG(Log::HLE, "Failed to wake helper thread from wait");
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}
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}
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void HLEHelperThread::Forget() {
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id_ = 0;
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entry_ = 0;
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}
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