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/* Copyright (C) 2010-2015 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (memmap.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdint.h>
#include <memmap.h>
#ifndef PROT_READ
#define PROT_READ 0x1 /* Page can be read */
#endif
#ifndef PROT_WRITE
#define PROT_WRITE 0x2 /* Page can be written. */
#endif
#ifndef PROT_READWRITE
#define PROT_READWRITE 0x3 /* Page can be written to and read from. */
#endif
#ifndef PROT_EXEC
#define PROT_EXEC 0x4 /* Page can be executed. */
#endif
#ifndef PROT_NONE
#define PROT_NONE 0x0 /* Page can not be accessed. */
#endif
#ifndef MAP_FAILED
#define MAP_FAILED ((void *) -1)
#endif
#ifdef _WIN32
void* mmap(void *addr, size_t len, int prot, int flags, int fildes, size_t offset)
{
void *map = (void*)NULL;
HANDLE handle = INVALID_HANDLE_VALUE;
switch (prot)
{
case PROT_READ:
default:
{
handle = CreateFileMapping((HANDLE) _get_osfhandle(fildes), 0, PAGE_READONLY, 0,
len, 0);
if (!handle)
break;
map = (void*)MapViewOfFile(handle, FILE_MAP_READ, 0, 0, len);
CloseHandle(handle);
break;
}
case PROT_WRITE:
{
handle = CreateFileMapping((HANDLE) _get_osfhandle(fildes),0,PAGE_READWRITE,0,
len, 0);
if (!handle)
break;
map = (void*)MapViewOfFile(handle, FILE_MAP_WRITE, 0, 0, len);
CloseHandle(handle);
break;
}
case PROT_READWRITE:
{
handle = CreateFileMapping((HANDLE) _get_osfhandle(fildes),0,PAGE_READWRITE,0,
len, 0);
if (!handle)
break;
map = (void*)MapViewOfFile(handle, FILE_MAP_ALL_ACCESS, 0, 0, len);
CloseHandle(handle);
break;
}
}
if (map == (void*)NULL)
return((void*)MAP_FAILED);
return((void*) ((int8_t*)map + offset));
}
int munmap(void *addr, size_t length)
{
if (!UnmapViewOfFile(addr))
return -1;
return 0;
}
int mprotect(void *addr, size_t len, int prot)
{
/* Incomplete, just assumes PAGE_EXECUTE_READWRITE right now
* instead of correctly handling prot */
prot = 0;
if (prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
prot = PAGE_EXECUTE_READWRITE;
return VirtualProtect(addr, len, prot, 0);
}
#elif !defined(HAVE_MMAN)
void* mmap(void *addr, size_t len, int prot, int flags, int fildes, size_t offset)
{
return malloc(len);
}
int munmap(void *addr, size_t len)
{
free(addr);
return 0;
}
int mprotect(void *addr, size_t len, int prot)
{
/* stub - not really needed at this point since this codepath has no dynarecs */
return 0;
}
#endif
#if defined(__MACH__) && defined(__arm__)
#include <libkern/OSCacheControl.h>
#endif
int memsync(void *start, void *end)
{
size_t len = (char*)end - (char*)start;
#if defined(__MACH__) && defined(__arm__)
sys_dcache_flush(start ,len);
sys_icache_invalidate(start, len);
return 0;
#elif defined(__arm__) && !defined(__QNX__)
(void)len;
__clear_cache(start, end);
return 0;
#elif defined(HAVE_MMAN)
return msync(start, len, MS_SYNC | MS_INVALIDATE
#ifdef __QNX__
MS_CACHE_ONLY
#endif
);
#else
(void)len;
return 0;
#endif
}
int memprotect(void *addr, size_t len)
{
return mprotect(addr, len, PROT_READ | PROT_WRITE | PROT_EXEC);
}
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