Protect BBL data, not just text

h/t @michaeljclark
7 years ago · e2e2e9db2e
1 changed files with 2 additions and 2 deletions
--- a/bbl/bbl.c
+++ b/bbl/bbl.c
@ -66,9 +66,9 @@ static void protect_memory(void)
    return setup_pmp();

  // Prevent S-mode access to our part of memory.
-  extern char _ftext, _etext, _end;
+  extern char _ftext, _end;
  a0 = (uintptr_t)&_ftext >> PMP_SHIFT;
-  a1 = (uintptr_t)&_etext >> PMP_SHIFT;
+  a1 = (uintptr_t)&_end >> PMP_SHIFT;
  cfg = PMP_TOR << 8;
  // Give S-mode free rein of everything else.
  a2 = -1;