refactor: elf parsing utility and exec related

[lunaix-os.git] / lunaix-os / kernel / mm / mmap.c

diff --git a/lunaix-os/kernel/mm/mmap.c b/lunaix-os/kernel/mm/mmap.c
index f700fd533179d9528ff84191e6f14402d0f5eca2..8eb7482b60af4b3bf7686a8e478ae0f54f1c7f52 100644 (file)
--- a/lunaix-os/kernel/mm/mmap.c
+++ b/lunaix-os/kernel/mm/mmap.c
@@ -139,6 +139,15 @@ found:
     return 0;
 }
 
+int
+mem_remap(void** addr_out,
+          struct mm_region** remapped,
+          void* addr,
+          struct v_file* file,
+          struct mmap_param* param)
+{
+}
+
 void
 mem_sync_pages(ptr_t mnt,
                struct mm_region* region,
@@ -288,24 +297,25 @@ __DEFINE_LXSYSCALL3(void*, sys_mmap, void*, addr, size_t, length, va_list, lst)
     if (!addr) {
         addr = UMMAP_START;
     } else if (addr < UMMAP_START || addr + length >= UMMAP_END) {
-        errno = ENOMEM;
-        goto done;
-    }
-
-    struct v_fd* vfd;
-    if ((errno = vfs_getfd(fd, &vfd))) {
-        goto done;
+        if (!(options & (MAP_FIXED | MAP_FIXED_NOREPLACE))) {
+            errno = ENOMEM;
+            goto done;
+        }
     }
 
-    struct v_file* file = vfd->file;
+    struct v_file* file = NULL;
 
     if (!(options & MAP_ANON)) {
+        struct v_fd* vfd;
+        if ((errno = vfs_getfd(fd, &vfd))) {
+            goto done;
+        }
+
+        file = vfd->file;
         if (!file->ops->read_page) {
             errno = ENODEV;
             goto done;
         }
-    } else {
-        file = NULL;
     }
 
     struct mmap_param param = { .flags = options,