[GOLD] Got_offset_list: addend field

This is the first in a series of patches aimed at supporting GOT
entries against symbol plus addend generally for PowerPC64 rather than
just section symbol plus addend as gold has currently.

This patch adds an addend field to Got_offset_list, so that both local
and global symbols can have GOT entries with addend.

	PR 28192
	* object.h (Got_offset_list): Add addend_ field, init in both
	constructors.  Adjust all accessors to suit.
	(Sized_relobj::do_local_has_got_offset): Adjust to suit.
	(Sized_relobj::do_local_got_offset): Likewise.
	(Sized_relobj::do_set_local_got_offset): Likewise.
	* symtab.h (Symbol::has_got_offset): Add optional addend param.
	(Symbol::got_offset, Symbol::set_got_offset): Likewise.
	* incremental.cc (Local_got_offset_visitor::visit): Add unused
	uint64_t parameter with FIXME.
	(Global_got_offset_visitor::visit): Add unused uint64_t parameter.

3 files changed, 34 insertions, 22 deletions

diff --git a/gold/incremental.cc b/gold/incremental.cc
index ab258dd189..52941985e6 100644
--- a/gold/incremental.cc
+++ b/gold/incremental.cc
@@ -1848,7 +1848,7 @@ class Local_got_offset_visitor : public Got_offset_list::Visitor
   { }
 
   void
-  visit(unsigned int got_type, unsigned int got_offset)
+  visit(unsigned int got_type, unsigned int got_offset, uint64_t)
   {
     unsigned int got_index = got_offset / this->info_.got_entry_size;
     gold_assert(got_index < this->info_.got_count);
@@ -1860,6 +1860,12 @@ class Local_got_offset_visitor : public Got_offset_list::Visitor
     unsigned char* pov = this->info_.got_desc_p + got_index * 8;
     elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index);
     elfcpp::Swap<32, big_endian>::writeval(pov + 4, this->info_.input_index);
+    // FIXME: the uint64_t addend should be written here if powerpc64
+    // sym+addend got entries are to be supported, with similar changes
+    // to Global_got_offset_visitor and support to read them back in
+    // do_process_got_plt.
+    // FIXME: don't we need this for section symbol plus addend anyway?
+    // (See 2015-12-03 commit 7ef8ae7c5f35)
   }
 
  private:
@@ -1879,7 +1885,7 @@ class Global_got_offset_visitor : public Got_offset_list::Visitor
   { }
 
   void
-  visit(unsigned int got_type, unsigned int got_offset)
+  visit(unsigned int got_type, unsigned int got_offset, uint64_t)
   {
     unsigned int got_index = got_offset / this->info_.got_entry_size;
     gold_assert(got_index < this->info_.got_count);
diff --git a/gold/object.h b/gold/object.h
index 38f4a2fd3f..66e565c1b4 100644
--- a/gold/object.h
+++ b/gold/object.h
@@ -214,11 +214,13 @@ class Got_offset_list
 {
  public:
   Got_offset_list()
-    : got_type_(-1U), got_offset_(0), got_next_(NULL)
+    : got_type_(-1U), got_offset_(0), addend_(0), got_next_(NULL)
   { }
 
-  Got_offset_list(unsigned int got_type, unsigned int got_offset)
-    : got_type_(got_type), got_offset_(got_offset), got_next_(NULL)
+  Got_offset_list(unsigned int got_type, unsigned int got_offset,
+		  uint64_t addend)
+    : got_type_(got_type), got_offset_(got_offset), addend_(addend),
+      got_next_(NULL)
   { }
 
   ~Got_offset_list()
@@ -236,29 +238,31 @@ class Got_offset_list
   {
     this->got_type_ = -1U;
     this->got_offset_ = 0;
+    this->addend_ = 0;
     this->got_next_ = NULL;
   }
 
   // Set the offset for the GOT entry of type GOT_TYPE.
   void
-  set_offset(unsigned int got_type, unsigned int got_offset)
+  set_offset(unsigned int got_type, unsigned int got_offset, uint64_t addend)
   {
     if (this->got_type_ == -1U)
       {
         this->got_type_ = got_type;
         this->got_offset_ = got_offset;
+        this->addend_ = addend;
       }
     else
       {
         for (Got_offset_list* g = this; g != NULL; g = g->got_next_)
           {
-            if (g->got_type_ == got_type)
+            if (g->got_type_ == got_type && g->addend_ == addend)
               {
                 g->got_offset_ = got_offset;
                 return;
               }
           }
-        Got_offset_list* g = new Got_offset_list(got_type, got_offset);
+        Got_offset_list* g = new Got_offset_list(got_type, got_offset, addend);
         g->got_next_ = this->got_next_;
         this->got_next_ = g;
       }
@@ -266,11 +270,11 @@ class Got_offset_list
 
   // Return the offset for a GOT entry of type GOT_TYPE.
   unsigned int
-  get_offset(unsigned int got_type) const
+  get_offset(unsigned int got_type, uint64_t addend) const
   {
     for (const Got_offset_list* g = this; g != NULL; g = g->got_next_)
       {
-        if (g->got_type_ == got_type)
+        if (g->got_type_ == got_type && g->addend_ == addend)
           return g->got_offset_;
       }
     return -1U;
@@ -297,7 +301,7 @@ class Got_offset_list
     { }
 
     virtual void
-    visit(unsigned int, unsigned int) = 0;
+    visit(unsigned int, unsigned int, uint64_t) = 0;
   };
 
   // Loop over all GOT offset entries, calling a visitor class V for each.
@@ -307,12 +311,13 @@ class Got_offset_list
     if (this->got_type_ == -1U)
       return;
     for (const Got_offset_list* g = this; g != NULL; g = g->got_next_)
-      v->visit(g->got_type_, g->got_offset_);
+      v->visit(g->got_type_, g->got_offset_, g->addend_);
   }
 
  private:
   unsigned int got_type_;
   unsigned int got_offset_;
+  uint64_t addend_;
   Got_offset_list* got_next_;
 };
 
@@ -2134,7 +2139,7 @@ class Sized_relobj : public Relobj
     Local_got_offsets::const_iterator p =
         this->local_got_offsets_.find(key);
     return (p != this->local_got_offsets_.end()
-            && p->second->get_offset(got_type) != -1U);
+            && p->second->get_offset(got_type, addend) != -1U);
   }
 
   // Return the GOT offset of type GOT_TYPE of the local symbol
@@ -2147,7 +2152,7 @@ class Sized_relobj : public Relobj
     Local_got_offsets::const_iterator p =
         this->local_got_offsets_.find(key);
     gold_assert(p != this->local_got_offsets_.end());
-    unsigned int off = p->second->get_offset(got_type);
+    unsigned int off = p->second->get_offset(got_type, addend);
     gold_assert(off != -1U);
     return off;
   }
@@ -2162,10 +2167,10 @@ class Sized_relobj : public Relobj
     Local_got_offsets::const_iterator p =
         this->local_got_offsets_.find(key);
     if (p != this->local_got_offsets_.end())
-      p->second->set_offset(got_type, got_offset);
+      p->second->set_offset(got_type, got_offset, addend);
     else
       {
-        Got_offset_list* g = new Got_offset_list(got_type, got_offset);
+	Got_offset_list* g = new Got_offset_list(got_type, got_offset, addend);
         std::pair<Local_got_offsets::iterator, bool> ins =
             this->local_got_offsets_.insert(std::make_pair(key, g));
         gold_assert(ins.second);
diff --git a/gold/symtab.h b/gold/symtab.h
index 104429a5af..a60cfb9ca1 100644
--- a/gold/symtab.h
+++ b/gold/symtab.h
@@ -428,22 +428,23 @@ class Symbol
   // Return whether this symbol has an entry in the GOT section.
   // For a TLS symbol, this GOT entry will hold its tp-relative offset.
   bool
-  has_got_offset(unsigned int got_type) const
-  { return this->got_offsets_.get_offset(got_type) != -1U; }
+  has_got_offset(unsigned int got_type, uint64_t addend = 0) const
+  { return this->got_offsets_.get_offset(got_type, addend) != -1U; }
 
   // Return the offset into the GOT section of this symbol.
   unsigned int
-  got_offset(unsigned int got_type) const
+  got_offset(unsigned int got_type, uint64_t addend = 0) const
   {
-    unsigned int got_offset = this->got_offsets_.get_offset(got_type);
+    unsigned int got_offset = this->got_offsets_.get_offset(got_type, addend);
     gold_assert(got_offset != -1U);
     return got_offset;
   }
 
   // Set the GOT offset of this symbol.
   void
-  set_got_offset(unsigned int got_type, unsigned int got_offset)
-  { this->got_offsets_.set_offset(got_type, got_offset); }
+  set_got_offset(unsigned int got_type, unsigned int got_offset,
+		 uint64_t addend = 0)
+  { this->got_offsets_.set_offset(got_type, got_offset, addend); }
 
   // Return the GOT offset list.
   const Got_offset_list*