cheri: elf: elfptr_t l_map_start in link_map struct

Use a capability for the load segment start that covers all load
segments so pointers can be derived from it.

It should have RX permission and a separate capability used for
writable pointers.

diff --git a/include/link.h b/include/link.h
index 0ac82d7c774f0975bbc9eaae4792e881eab67aeb..7632ae33d36d11b6f6ac470ba1d87092bd303929 100644 (file)
--- a/include/link.h
+++ b/include/link.h
@@ -252,7 +252,8 @@ struct link_map
 
     /* Start and finish of memory map for this object.  l_map_start
        need not be the same as l_addr.  */
-    ElfW(Addr) l_map_start, l_map_end;
+    elfptr_t l_map_start;
+    ElfW(Addr) l_map_end;
     /* End of the executable part of the mapping.  */
     ElfW(Addr) l_text_end;