[pcsx_rearmed.git] / frontend / 3ds / sys / mman.h

#ifndef MMAN_H
#define MMAN_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <malloc.h>

#include "3ds_utils.h"

#define PROT_READ       0b001
#define PROT_WRITE      0b010
#define PROT_EXEC       0b100
#define MAP_PRIVATE     2
#define MAP_FIXED       0x10
#define MAP_ANONYMOUS   0x20

#define MAP_FAILED      ((void *)-1)

static void* dynarec_cache = NULL;
static void* dynarec_cache_mapping = NULL;

static inline void* mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
{
   (void)fd;
   (void)offset;

   void* addr_out;

   if((prot == (PROT_READ | PROT_WRITE | PROT_EXEC)) &&
      (flags == (MAP_PRIVATE | MAP_ANONYMOUS)))
   {
      if(__ctr_svchax)
      {
         /* this hack works only for pcsx_rearmed */
         uint32_t currentHandle;

         if (!dynarec_cache) {
            dynarec_cache = memalign(0x1000, len);
            if (!dynarec_cache)
               return MAP_FAILED;
         }

         svcDuplicateHandle(&currentHandle, 0xFFFF8001);
         svcControlProcessMemory(currentHandle, addr, dynarec_cache,
                                 len, MEMOP_MAP, prot);
         svcCloseHandle(currentHandle);
         dynarec_cache_mapping = addr;
         memset(addr, 0, len);
         return addr;
      }
      else
      {
         printf("tried to mmap RWX pages without svcControlProcessMemory access !\n");
         return MAP_FAILED;
      }

   }

   addr_out = memalign(0x1000, len);
   if (!addr_out)
      return MAP_FAILED;

   memset(addr_out, 0, len);
   return addr_out;
}

static inline int mprotect(void *addr, size_t len, int prot)
{
   if(__ctr_svchax)
   {
      uint32_t currentHandle;
      svcDuplicateHandle(&currentHandle, 0xFFFF8001);
      svcControlProcessMemory(currentHandle, addr, NULL,
                              len, MEMOP_PROT, prot);
      svcCloseHandle(currentHandle);
      return 0;
   }

   printf("mprotect called without svcControlProcessMemory access !\n");
   return -1;
}

static inline int munmap(void *addr, size_t len)
{
   if((addr == dynarec_cache_mapping) && __ctr_svchax)
   {
      uint32_t currentHandle;
      svcDuplicateHandle(&currentHandle, 0xFFFF8001);
      svcControlProcessMemory(currentHandle,
                              dynarec_cache, dynarec_cache_mapping,
                              len, MEMOP_UNMAP, 0b111);
      svcCloseHandle(currentHandle);
      dynarec_cache_mapping = NULL;

   }
   else
      free(addr);

   return 0;
}

#ifdef __cplusplus
};
#endif

#endif // MMAN_H
Commit	Line	Data
	1	#ifndef MMAN_H
	2	#define MMAN_H
	3
	4	#ifdef __cplusplus
	5	extern "C" {
	6	#endif
	7
	8	#include <stdlib.h>
	9	#include <stdio.h>
	10	#include <string.h>
	11	#include <stdint.h>
	12	#include <malloc.h>
	13
	14	#include "3ds_utils.h"
	15
	16	#define PROT_READ 0b001
	17	#define PROT_WRITE 0b010
	18	#define PROT_EXEC 0b100
	19	#define MAP_PRIVATE 2
	20	#define MAP_FIXED 0x10
	21	#define MAP_ANONYMOUS 0x20
	22
	23	#define MAP_FAILED ((void *)-1)
	24
	25	static void* dynarec_cache = NULL;
	26	static void* dynarec_cache_mapping = NULL;
	27
	28	static inline void* mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
	29	{
	30	(void)fd;
	31	(void)offset;
	32
	33	void* addr_out;
	34
	35	if((prot == (PROT_READ \| PROT_WRITE \| PROT_EXEC)) &&
	36	(flags == (MAP_PRIVATE \| MAP_ANONYMOUS)))
	37	{
	38	if(__ctr_svchax)
	39	{
	40	/* this hack works only for pcsx_rearmed */
	41	uint32_t currentHandle;
	42
	43	if (!dynarec_cache) {
	44	dynarec_cache = memalign(0x1000, len);
	45	if (!dynarec_cache)
	46	return MAP_FAILED;
	47	}
	48
	49	svcDuplicateHandle(&currentHandle, 0xFFFF8001);
	50	svcControlProcessMemory(currentHandle, addr, dynarec_cache,
	51	len, MEMOP_MAP, prot);
	52	svcCloseHandle(currentHandle);
	53	dynarec_cache_mapping = addr;
	54	memset(addr, 0, len);
	55	return addr;
	56	}
	57	else
	58	{
	59	printf("tried to mmap RWX pages without svcControlProcessMemory access !\n");
	60	return MAP_FAILED;
	61	}
	62
	63	}
	64
	65	addr_out = memalign(0x1000, len);
	66	if (!addr_out)
	67	return MAP_FAILED;
	68
	69	memset(addr_out, 0, len);
	70	return addr_out;
	71	}
	72
	73	static inline int mprotect(void *addr, size_t len, int prot)
	74	{
	75	if(__ctr_svchax)
	76	{
	77	uint32_t currentHandle;
	78	svcDuplicateHandle(&currentHandle, 0xFFFF8001);
	79	svcControlProcessMemory(currentHandle, addr, NULL,
	80	len, MEMOP_PROT, prot);
	81	svcCloseHandle(currentHandle);
	82	return 0;
	83	}
	84
	85	printf("mprotect called without svcControlProcessMemory access !\n");
	86	return -1;
	87	}
	88
	89	static inline int munmap(void *addr, size_t len)
	90	{
	91	if((addr == dynarec_cache_mapping) && __ctr_svchax)
	92	{
	93	uint32_t currentHandle;
	94	svcDuplicateHandle(&currentHandle, 0xFFFF8001);
	95	svcControlProcessMemory(currentHandle,
	96	dynarec_cache, dynarec_cache_mapping,
	97	len, MEMOP_UNMAP, 0b111);
	98	svcCloseHandle(currentHandle);
	99	dynarec_cache_mapping = NULL;
	100
	101	}
	102	else
	103	free(addr);
	104
	105	return 0;
	106	}
	107
	108	#ifdef __cplusplus
	109	};
	110	#endif
	111
	112	#endif // MMAN_H
	113