[PATCH] D45902: Add "-z lazy" and "-z relro".

[Rui Ueyama via Phabricator via llvm-commits]

ruiu created this revision.
ruiu added a reviewer: tmsriram.
Herald added subscribers: arichardson, emaste.
Herald added a reviewer: espindola.

Add "-z lazy" and "-z relro".


https://reviews.llvm.org/D45902

Files:
  lld/ELF/Driver.cpp


Index: lld/ELF/Driver.cpp
===================================================================
--- lld/ELF/Driver.cpp
+++ lld/ELF/Driver.cpp
@@ -313,6 +313,17 @@
   return false;
 }
 
+static bool
+getZFlag(opt::InputArgList &Args, StringRef K1, StringRef K2, bool Default) {
+  for (auto *Arg : llvm::reverse(Args.filtered(OPT_z))) {
+    if (K1 == Arg->getValue())
+      return true;
+    if (K2 == Arg->getValue())
+      return false;
+  }
+  return Default;
+}
+
 void LinkerDriver::main(ArrayRef<const char *> ArgsArr) {
   ELFOptTable Parser;
   opt::InputArgList Args = Parser.parse(ArgsArr.slice(1));
@@ -754,9 +765,9 @@
   Config->ZNocopyreloc = hasZOption(Args, "nocopyreloc");
   Config->ZNodelete = hasZOption(Args, "nodelete");
   Config->ZNodlopen = hasZOption(Args, "nodlopen");
-  Config->ZNow = hasZOption(Args, "now");
+  Config->ZNow = getZFlag(Args, "now", "lazy", true);
   Config->ZOrigin = hasZOption(Args, "origin");
-  Config->ZRelro = !hasZOption(Args, "norelro");
+  Config->ZRelro = getZFlag(Args, "relro", "norelro", true);
   Config->ZRetpolineplt = hasZOption(Args, "retpolineplt");
   Config->ZRodynamic = hasZOption(Args, "rodynamic");
   Config->ZStackSize = args::getZOptionValue(Args, OPT_z, "stack-size", 0);


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