[GOLD] Symbol flag for PowerPC64 localentry:0 tracking

This patch provides a flag for PowerPC64 ELFv2 use in class Symbol,
and modifies Sized_target::resolve to return whether the symbol has
been resolved.  If not, normal processing continues.  I use this for
PowerPC64 ELFv2 to keep track of whether a symbol has any definition
with non-zero localentry, in order to disable --plt-localentry for
that symbol.

	PR 21847
	* powerpc.cc (Target_powerpc::is_elfv2_localentry0): Test
	non_zero_localentry.
	(Target_powerpc::resolve): New function.
	(powerpc_info): Set has_resolve for 64-bit.
	* target.h (Sized_target::resolve): Return bool.
	* resolve.cc (Symbol_table::resolve): Continue with normal
	processing when target resolve returns false.
	* symtab.h (Symbol::non_zero_localentry, set_non_zero_localentry):
	New accessors.
	(Symbol::non_zero_localentry_): New flag bit.
	* symtab.cc (Symbol::init_fields): Init non_zero_localentry_.

1 files changed, 12 insertions, 0 deletions

diff --git a/gold/symtab.h b/gold/symtab.h
index 77552ae7ca8..c371731b5eb 100644
--- a/gold/symtab.h
+++ b/gold/symtab.h
@@ -883,6 +883,16 @@ class Symbol
   set_is_protected()
   { this->is_protected_ = true; }
 
+  // Return state of PowerPC64 ELFv2 specific flag.
+  bool
+  non_zero_localentry() const
+  { return this->non_zero_localentry_; }
+
+  // Set PowerPC64 ELFv2 specific flag.
+  void
+  set_non_zero_localentry()
+  { this->non_zero_localentry_ = true; }
+
  protected:
   // Instances of this class should always be created at a specific
   // size.
@@ -1084,6 +1094,8 @@ class Symbol
   // The visibility_ field will be STV_DEFAULT in this case because we
   // must treat it as such from outside the shared object.
   bool is_protected_  : 1;
+  // Used by PowerPC64 ELFv2 to track st_other localentry (bit 36).
+  bool non_zero_localentry_ : 1;
 };
 
 // The parts of a symbol which are size specific.  Using a template