mirror of
https://github.com/libretro/ppsspp.git
synced 2024-11-25 01:00:01 +00:00
100 lines
2.9 KiB
C++
100 lines
2.9 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/
|
|
|
|
#pragma once
|
|
|
|
#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)
|
|
typedef ArmGen::ARMXEmitter ThunkEmitter;
|
|
typedef ArmGen::ARMXCodeBlock ThunkCodeBlock;
|
|
#else
|
|
typedef Gen::XEmitter ThunkEmitter;
|
|
typedef Gen::XCodeBlock ThunkCodeBlock;
|
|
#endif
|
|
|
|
class ThunkManager : public ThunkCodeBlock
|
|
{
|
|
std::map<const void *, const u8 *> thunks;
|
|
|
|
const u8 *save_regs;
|
|
const u8 *load_regs;
|
|
|
|
public:
|
|
ThunkManager() {
|
|
Init();
|
|
}
|
|
~ThunkManager() {
|
|
Shutdown();
|
|
}
|
|
const void *ProtectFunction(const void *function, int num_params);
|
|
|
|
template <typename Tr>
|
|
const void *ProtectFunction(Tr (*func)()) {
|
|
return ProtectFunction((const void *)func, 0);
|
|
}
|
|
|
|
template <typename Tr, typename T1>
|
|
const void *ProtectFunction(Tr (*func)(T1)) {
|
|
return ProtectFunction((const void *)func, 1);
|
|
}
|
|
|
|
template <typename Tr, typename T1, typename T2>
|
|
const void *ProtectFunction(Tr (*func)(T1, T2)) {
|
|
return ProtectFunction((const void *)func, 2);
|
|
}
|
|
|
|
template <typename Tr, typename T1, typename T2, typename T3>
|
|
const void *ProtectFunction(Tr (*func)(T1, T2, T3)) {
|
|
return ProtectFunction((const void *)func, 3);
|
|
}
|
|
|
|
template <typename Tr, typename T1, typename T2, typename T3, typename T4>
|
|
const void *ProtectFunction(Tr (*func)(T1, T2, T3, T4)) {
|
|
return ProtectFunction((const void *)func, 4);
|
|
}
|
|
|
|
void Enter(ThunkEmitter *emit, bool withinCall = false);
|
|
void Leave(ThunkEmitter *emit, bool withinCall = false);
|
|
|
|
private:
|
|
void Init();
|
|
void Shutdown();
|
|
void Reset();
|
|
|
|
int ThunkStackOffset();
|
|
int ThunkBytesNeeded();
|
|
};
|