mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-12-11 07:34:08 +00:00
223 lines
5.8 KiB
C++
223 lines
5.8 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/
|
|
|
|
#include "Common.h"
|
|
#include "MemoryUtil.h"
|
|
#include "StringUtils.h"
|
|
|
|
#ifdef _WIN32
|
|
#include "CommonWindows.h"
|
|
#else
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
#ifdef __APPLE__
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
#endif
|
|
|
|
|
|
|
|
#if !defined(_WIN32) && defined(__x86_64__) && !defined(MAP_32BIT)
|
|
#include <unistd.h>
|
|
#ifdef __APPLE__
|
|
#define PAGE_MASK (4096-1)
|
|
#else
|
|
#define PAGE_MASK (getpagesize() - 1)
|
|
#endif
|
|
#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
|
|
#endif
|
|
|
|
#ifdef __SYMBIAN32__
|
|
#include <e32std.h>
|
|
#define CODECHUNK_SIZE 1024*1024*20
|
|
static RChunk* g_code_chunk = NULL;
|
|
static RHeap* g_code_heap = NULL;
|
|
static u8* g_next_ptr = NULL;
|
|
static u8* g_orig_ptr = NULL;
|
|
|
|
void ResetExecutableMemory(void* ptr)
|
|
{
|
|
// Just reset the ptr to the base
|
|
g_next_ptr = g_orig_ptr;
|
|
}
|
|
#endif
|
|
|
|
// This is purposely not a full wrapper for virtualalloc/mmap, but it
|
|
// provides exactly the primitive operations that PPSSPP needs.
|
|
|
|
void* AllocateExecutableMemory(size_t size, bool low)
|
|
{
|
|
#if defined(_WIN32)
|
|
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
|
|
#elif defined(__SYMBIAN32__)
|
|
//This function may be called more than once, and we want to create only one big
|
|
//memory chunk for all the executable code for the JIT
|
|
if( g_code_chunk == NULL && g_code_heap == NULL)
|
|
{
|
|
g_code_chunk = new RChunk();
|
|
g_code_chunk->CreateLocalCode(CODECHUNK_SIZE, CODECHUNK_SIZE + 3*GetPageSize());
|
|
g_code_heap = UserHeap::ChunkHeap(*g_code_chunk, CODECHUNK_SIZE, 1, CODECHUNK_SIZE + 3*GetPageSize());
|
|
g_next_ptr = reinterpret_cast<u8*>(g_code_heap->AllocZ(CODECHUNK_SIZE));
|
|
g_orig_ptr = g_next_ptr;
|
|
}
|
|
void* ptr = (void*)g_next_ptr;
|
|
g_next_ptr += size;
|
|
#else
|
|
static char *map_hint = 0;
|
|
#if defined(__x86_64__) && !defined(MAP_32BIT)
|
|
// This OS has no flag to enforce allocation below the 4 GB boundary,
|
|
// but if we hint that we want a low address it is very likely we will
|
|
// get one.
|
|
// An older version of this code used MAP_FIXED, but that has the side
|
|
// effect of discarding already mapped pages that happen to be in the
|
|
// requested virtual memory range (such as the emulated RAM, sometimes).
|
|
if (low && (!map_hint))
|
|
map_hint = (char*)round_page(512*1024*1024); /* 0.5 GB rounded up to the next page */
|
|
#endif
|
|
void* ptr = mmap(map_hint, size, PROT_READ | PROT_WRITE | PROT_EXEC,
|
|
MAP_ANON | MAP_PRIVATE
|
|
#if defined(__x86_64__) && defined(MAP_32BIT)
|
|
| (low ? MAP_32BIT : 0)
|
|
#endif
|
|
, -1, 0);
|
|
#endif /* defined(_WIN32) */
|
|
|
|
// printf("Mapped executable memory at %p (size %ld)\n", ptr,
|
|
// (unsigned long)size);
|
|
|
|
#if defined(__FreeBSD__)
|
|
if (ptr == MAP_FAILED)
|
|
{
|
|
ptr = NULL;
|
|
#else
|
|
if (ptr == NULL)
|
|
{
|
|
#endif
|
|
PanicAlert("Failed to allocate executable memory");
|
|
}
|
|
#if !defined(_WIN32) && defined(__x86_64__) && !defined(MAP_32BIT)
|
|
else if (low)
|
|
{
|
|
map_hint += size;
|
|
map_hint = (char*)round_page(map_hint); /* round up to the next page */
|
|
// printf("Next map will (hopefully) be at %p\n", map_hint);
|
|
}
|
|
#endif
|
|
|
|
return ptr;
|
|
}
|
|
|
|
void* AllocateMemoryPages(size_t size)
|
|
{
|
|
size = (size + 4095) & (~4095);
|
|
#ifdef _WIN32
|
|
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
|
|
#elif defined(__SYMBIAN32__)
|
|
void* ptr = malloc(size);
|
|
#else
|
|
void* ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
|
|
#endif
|
|
|
|
// printf("Mapped memory at %p (size %ld)\n", ptr,
|
|
// (unsigned long)size);
|
|
if (ptr == NULL)
|
|
PanicAlert("Failed to allocate raw memory");
|
|
|
|
return ptr;
|
|
}
|
|
|
|
void* AllocateAlignedMemory(size_t size,size_t alignment)
|
|
{
|
|
#ifdef _WIN32
|
|
void* ptr = _aligned_malloc(size,alignment);
|
|
#else
|
|
void* ptr = NULL;
|
|
#ifdef ANDROID
|
|
ptr = memalign(alignment, size);
|
|
#elif defined(__SYMBIAN32__)
|
|
// On Symbian, alignment won't matter as NEON isn't supported.
|
|
ptr = malloc(size);
|
|
#else
|
|
if(posix_memalign(&ptr, alignment, size) != 0)
|
|
ptr = NULL;
|
|
#endif
|
|
#endif
|
|
|
|
// printf("Mapped memory at %p (size %ld)\n", ptr,
|
|
// (unsigned long)size);
|
|
|
|
if (ptr == NULL)
|
|
PanicAlert("Failed to allocate aligned memory");
|
|
|
|
return ptr;
|
|
}
|
|
|
|
void FreeMemoryPages(void* ptr, size_t size)
|
|
{
|
|
size = (size + 4095) & (~4095);
|
|
if (ptr)
|
|
{
|
|
#ifdef _WIN32
|
|
|
|
if (!VirtualFree(ptr, 0, MEM_RELEASE))
|
|
PanicAlert("FreeMemoryPages failed!\n%s", GetLastErrorMsg());
|
|
ptr = NULL; // Is this our responsibility?
|
|
#elif defined(__SYMBIAN32__)
|
|
free(ptr);
|
|
#else
|
|
munmap(ptr, size);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void FreeAlignedMemory(void* ptr)
|
|
{
|
|
if (ptr)
|
|
{
|
|
#ifdef _WIN32
|
|
_aligned_free(ptr);
|
|
#else
|
|
free(ptr);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void WriteProtectMemory(void* ptr, size_t size, bool allowExecute)
|
|
{
|
|
#ifdef _WIN32
|
|
DWORD oldValue;
|
|
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
|
|
PanicAlert("WriteProtectMemory failed!\n%s", GetLastErrorMsg());
|
|
#else
|
|
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
|
|
#endif
|
|
}
|
|
|
|
void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute)
|
|
{
|
|
#ifdef _WIN32
|
|
DWORD oldValue;
|
|
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE, &oldValue))
|
|
PanicAlert("UnWriteProtectMemory failed!\n%s", GetLastErrorMsg());
|
|
#else
|
|
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);
|
|
#endif
|
|
}
|
|
|