+void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
+ enum psxMapTag tag);
+void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
+
+void *psxMap(unsigned long addr, size_t size, int is_fixed,
+ enum psxMapTag tag)
+{
+ int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+ void *req, *ret;
+
+ if (psxMapHook != NULL)
+ return psxMapHook(addr, size, is_fixed, tag);
+
+ if (is_fixed)
+ flags |= MAP_FIXED;
+
+ req = (void *)addr;
+ ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
+ if (ret == MAP_FAILED)
+ return NULL;
+
+ if (req != NULL && ret != req)
+ SysMessage("psxMap: warning: wanted to map @%p, got %p\n",
+ req, ret);
+
+ return ret;
+}
+
+void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
+{
+ if (psxUnmapHook != NULL) {
+ psxUnmapHook(ptr, size, tag);
+ return;
+ }
+
+ munmap(ptr, size);
+}
+