PR ld/14265

	* script-sections.cc (Sections_element::output_section_name): Add
	keep return parameter.
	(Output_section_element::match_name): Add keep return parameter.
	Return the value of the keep_ member.
	* script-sections.h (class Output_section): Update
	output_section_name prototype.
	* layout.cc (Layout::keep_input_section): New public member
	function.
	(Layout::choose_output_section): Pass keep parameter to
	output_section_name.
	* layout.h (class Layout): Add keep_input_section.
	* object.cc (Sized_relobj_file::do_layout): Check for kept input
	sections.
	* testsuite/Makefile.am: Add a test.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/pr14265.c: Source file for the test.
	* testsuite/pr14265.t: Linker script for the test.
	* testsuite/pr14265.sh: Shell script for the test.

	* ld-gc/gc.exp: Add a new test.
	* ld-gc/pr14265.c: Source file for the new test.
	* ld-gc/pr14265.t: Linker script for the new test.
	* ld-gc/pr14265.d: Expected symbol dump.

1 files changed, 19 insertions, 12 deletions

diff --git a/gold/script-sections.cc b/gold/script-sections.cc
index f90c0b3..e5d3a93 100644
--- a/gold/script-sections.cc
+++ b/gold/script-sections.cc
@@ -582,7 +582,7 @@ class Sections_element
   // Output_section_definition.
   virtual const char*
   output_section_name(const char*, const char*, Output_section***,
-		      Script_sections::Section_type*)
+		      Script_sections::Section_type*, bool*)
   { return NULL; }
 
   // Initialize OSP with an output section.
@@ -800,7 +800,7 @@ class Output_section_element
   // Return whether this element matches FILE_NAME and SECTION_NAME.
   // The only real implementation is in Output_section_element_input.
   virtual bool
-  match_name(const char*, const char*) const
+  match_name(const char*, const char*, bool *) const
   { return false; }
 
   // Set section addresses.  This includes applying assignments if the
@@ -1238,10 +1238,10 @@ class Output_section_element_input : public Output_section_element
     *dot_section = this->final_dot_section_;
   }
 
-  // See whether we match FILE_NAME and SECTION_NAME as an input
-  // section.
+  // See whether we match FILE_NAME and SECTION_NAME as an input section.
+  // If we do then also indicate whether the section should be KEPT.
   bool
-  match_name(const char* file_name, const char* section_name) const;
+  match_name(const char* file_name, const char* section_name, bool* keep) const;
 
   // Set the section address.
   void
@@ -1393,15 +1393,19 @@ Output_section_element_input::match_file_name(const char* file_name) const
   return true;
 }
 
-// See whether we match FILE_NAME and SECTION_NAME.
+// See whether we match FILE_NAME and SECTION_NAME.  If we do then
+// KEEP indicates whether the section should survive garbage collection.
 
 bool
 Output_section_element_input::match_name(const char* file_name,
-					 const char* section_name) const
+					 const char* section_name,
+					 bool *keep) const
 {
   if (!this->match_file_name(file_name))
     return false;
 
+  *keep = this->keep_;
+
   // If there are no section name patterns, then we match.
   if (this->input_section_patterns_.empty())
     return true;
@@ -1861,7 +1865,8 @@ class Output_section_definition : public Sections_element
   // section name.
   const char*
   output_section_name(const char* file_name, const char* section_name,
-		      Output_section***, Script_sections::Section_type*);
+		      Output_section***, Script_sections::Section_type*,
+		      bool*);
 
   // Initialize OSP with an output section.
   void
@@ -2146,14 +2151,15 @@ Output_section_definition::output_section_name(
     const char* file_name,
     const char* section_name,
     Output_section*** slot,
-    Script_sections::Section_type* psection_type)
+    Script_sections::Section_type* psection_type,
+    bool* keep)
 {
   // Ask each element whether it matches NAME.
   for (Output_section_elements::const_iterator p = this->elements_.begin();
        p != this->elements_.end();
        ++p)
     {
-      if ((*p)->match_name(file_name, section_name))
+      if ((*p)->match_name(file_name, section_name, keep))
 	{
 	  // We found a match for NAME, which means that it should go
 	  // into this output section.
@@ -3365,7 +3371,8 @@ Script_sections::output_section_name(
     const char* file_name,
     const char* section_name,
     Output_section*** output_section_slot,
-    Script_sections::Section_type* psection_type)
+    Script_sections::Section_type* psection_type,
+    bool* keep)
 {
   for (Sections_elements::const_iterator p = this->sections_elements_->begin();
        p != this->sections_elements_->end();
@@ -3373,7 +3380,7 @@ Script_sections::output_section_name(
     {
       const char* ret = (*p)->output_section_name(file_name, section_name,
 						  output_section_slot,
-						  psection_type);
+						  psection_type, keep);
 
       if (ret != NULL)
 	{