mirror of
https://github.com/libretro/ppsspp.git
synced 2024-11-24 16:49:50 +00:00
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// Copyright (C) 2003 Dolphin Project.
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, version 2.0 or later versions.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License 2.0 for more details.
|
|
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
|
// If not, see http://www.gnu.org/licenses/
|
|
|
|
// Official SVN repository and contact information can be found at
|
|
// http://code.google.com/p/dolphin-emu/
|
|
|
|
#ifndef _THUNK_H_
|
|
#define _THUNK_H_
|
|
|
|
#include <map>
|
|
|
|
#include "Common.h"
|
|
#if defined(ARM)
|
|
#include "ArmEmitter.h"
|
|
#else
|
|
#include "x64Emitter.h"
|
|
#endif
|
|
|
|
// This simple class creates a wrapper around a C/C++ function that saves all fp state
|
|
// before entering it, and restores it upon exit. This is required to be able to selectively
|
|
// call functions from generated code, without inflicting the performance hit and increase
|
|
// of complexity that it means to protect the generated code from this problem.
|
|
|
|
// This process is called thunking.
|
|
|
|
// There will only ever be one level of thunking on the stack, plus,
|
|
// we don't want to pollute the stack, so we store away regs somewhere global.
|
|
// NOT THREAD SAFE. This may only be used from the CPU thread.
|
|
// Any other thread using this stuff will be FATAL.
|
|
#if defined(ARM)
|
|
class ThunkManager : public ArmGen::ARMXCodeBlock
|
|
#else
|
|
class ThunkManager : public Gen::XCodeBlock
|
|
#endif
|
|
{
|
|
std::map<void *, const u8 *> thunks;
|
|
|
|
const u8 *save_regs;
|
|
const u8 *load_regs;
|
|
|
|
public:
|
|
ThunkManager() {
|
|
Init();
|
|
}
|
|
~ThunkManager() {
|
|
Shutdown();
|
|
}
|
|
void *ProtectFunction(void *function, int num_params);
|
|
private:
|
|
void Init();
|
|
void Shutdown();
|
|
void Reset();
|
|
};
|
|
|
|
#endif // _THUNK_H_
|