1 files changed, 107 insertions, 0 deletions
diff --git a/frontend/3ds/sys/mman.h b/frontend/3ds/sys/mman.h
new file mode 100644
index 0000000..61dde6c
--- /dev/null
+++ b/frontend/3ds/sys/mman.h
@@ -0,0 +1,107 @@
+#ifndef MMAN_H
+#define MMAN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <stdio.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);
+
+         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 = malloc(len);
+   if(!addr_out)
+      return MAP_FAILED;
+
+   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
+