frontend/switch/sys/mman.h


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#ifndef MMAN_H
#define MMAN_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <malloc.h>
#include <switch.h>
#include <stdlib.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;
    Result rc = svcMapPhysicalMemory(addr, len);
    if (R_FAILED(rc))
    {
        printf("mmap failed\n");
        return malloc(len);
    }

    return addr;

//   if((prot == (PROT_READ | PROT_WRITE | PROT_EXEC)) &&
//      (flags == (MAP_PRIVATE | MAP_ANONYMOUS)))
//   {
//      if(true)// __ctr_svchax)
//     {
//         /* this hack works only for pcsx_rearmed */
//         uint32_t currentHandle;
//
//         if(!dynarec_cache)
//            dynarec_cache = memalign(0x1000, len);
//
//         //svcDuplicateHandle(&currentHandle, 0xFFFF8001);
//         //svcControlProcessMemory(currentHandle, addr, dynarec_cache,
//         //                        len, MEMOP_MAP, prot);
//         svcCloseHandle(currentHandle);
//         dynarec_cache_mapping = addr;
//         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;
//
//   return addr_out;
}

static inline int mprotect(void *addr, size_t len, int prot)
{
    return 0;
   //if(true) // __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)
{
    Result rc = svcUnmapPhysicalMemory(addr, len);
    if (R_FAILED(rc))
    {
        printf("munmap failed\n");
        free(addr);
    }
    return 0;
//   if((addr == dynarec_cache_mapping) && true)//__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