syscall_emul: implement MAP_FIXED option to mmap()

1 files changed, 9 insertions, 1 deletions

diff --git a/src/mem/page_table.hh b/src/mem/page_table.hh
index 61da5f322..d60f4a433 100644
--- a/src/mem/page_table.hh
+++ b/src/mem/page_table.hh
@@ -79,11 +79,19 @@ class PageTable
     Addr pageAlign(Addr a)  { return (a & ~offsetMask); }
     Addr pageOffset(Addr a) { return (a &  offsetMask); }
 
-    void allocate(Addr vaddr, int64_t size);
+    void allocate(Addr vaddr, int64_t size, bool clobber = false);
     void remap(Addr vaddr, int64_t size, Addr new_vaddr);
     void deallocate(Addr vaddr, int64_t size);
 
     /**
+     * Check if any pages in a region are already allocated
+     * @param vaddr The starting virtual address of the region.
+     * @param size The length of the region.
+     * @return True if no pages in the region are mapped.
+     */
+    bool isUnmapped(Addr vaddr, int64_t size);
+
+    /**
      * Lookup function
      * @param vaddr The virtual address.
      * @return entry The page table entry corresponding to vaddr.