[RFC,v3,6/6] Implement and document DF_1_UNIQUE handling in gold

Message ID 20200626150849.14135-7-vivek@collabora.com
State New
Headers show
Series
  • binutils patches to add DF_1_UNIQUE
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Commit Message

Alan Modra via Binutils June 26, 2020, 3:08 p.m.
---
 gold/layout.cc | 2 ++
 gold/options.h | 3 +++
 2 files changed, 5 insertions(+)

-- 
2.11.0

Patch

diff --git a/gold/layout.cc b/gold/layout.cc
index 13e533aaf2..b82d8c30fd 100644
--- a/gold/layout.cc
+++ b/gold/layout.cc
@@ -5356,6 +5356,8 @@  Layout::finish_dynamic_section(const Input_objects* input_objects,
     flags |= elfcpp::DF_1_GROUP;
   if (parameters->options().pie())
     flags |= elfcpp::DF_1_PIE;
+  if (parameters->options().unique())
+    flags |= elfcpp::DF_1_UNIQUE;
   if (flags != 0)
     odyn->add_constant(elfcpp::DT_FLAGS_1, flags);
 }
diff --git a/gold/options.h b/gold/options.h
index 3c8d25a662..8902b94a84 100644
--- a/gold/options.h
+++ b/gold/options.h
@@ -1463,6 +1463,9 @@  class General_options
   DEFINE_bool(interpose, options::DASH_Z, '\0', false,
 	      N_("Mark object to interpose all DSOs but executable"),
 	      NULL);
+  DEFINE_bool(unique, options::DASH_Z, '\0', false,
+              N_("Mark DSO to be loaded at most once, and only in the main namespace"),
+              N_("Do not mark the DSO as one to be loaded only in the main namespace"));
   DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0',
 		    N_("Mark object for lazy runtime binding"),
 		    NULL, true);