From f073a3e8c6735bd8fc24d35a957d8944087ea367 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Fri, 28 Jun 2019 10:17:45 +0930
Subject: [PATCH] [GOLD] PowerPC linkage table error

This fixes a segfault when attempring to output a "linkage table
error".  "object" is only non-NULL in the local symbol case.

	* powerpc.cc (Stub_table::plt_error): New function.
	(Stub_table::do_write): Use it.
	(Output_data_glink::do_write): Don't segfault emitting linkage
	table error.
---
 gold/ChangeLog  |  7 +++++++
 gold/powerpc.cc | 23 ++++++++++++++++++-----
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/gold/ChangeLog b/gold/ChangeLog
index 955e556c60a..225a85cdb68 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,10 @@
+2019-06-28  Alan Modra  <amodra@gmail.com>
+
+	* powerpc.cc (Stub_table::plt_error): New function.
+	(Stub_table::do_write): Use it.
+	(Output_data_glink::do_write): Don't segfault emitting linkage
+	table error.
+
 2019-06-28  Alan Modra  <amodra@gmail.com>
 
 	* powerpc.cc (Target_powerpc::Scan::get_reference_flags): Handle
diff --git a/gold/powerpc.cc b/gold/powerpc.cc
index 1f2407130b2..43010b8c055 100644
--- a/gold/powerpc.cc
+++ b/gold/powerpc.cc
@@ -4733,6 +4733,9 @@ class Stub_table : public Output_relaxed_input_section
     return bytes;
   }
 
+  void
+  plt_error(const Plt_stub_key& p);
+
   // Write out stubs.
   void
   do_write(Output_file*);
@@ -5384,6 +5387,19 @@ Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab)
     }
 }
 
+template<int size, bool big_endian>
+void
+Stub_table<size, big_endian>::plt_error(const Plt_stub_key& p)
+{
+  if (p.sym_)
+    gold_error(_("linkage table error against `%s'"),
+	       p.sym_->demangled_name().c_str());
+  else
+    gold_error(_("linkage table error against `%s:[local %u]'"),
+	       p.object_->name().c_str(),
+	       p.locsym_);
+}
+
 // Write out plt and long branch stub code.
 
 template<int size, bool big_endian>
@@ -5424,9 +5440,7 @@ Stub_table<size, big_endian>::do_write(Output_file* of)
 	      Address off = plt_addr - got_addr;
 
 	      if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
-		gold_error(_("%s: linkage table error against `%s'"),
-			   cs->first.object_->name().c_str(),
-			   cs->first.sym_->demangled_name().c_str());
+		this->plt_error(cs->first);
 
 	      bool plt_load_toc = this->targ_->abiversion() < 2;
 	      bool static_chain
@@ -5871,8 +5885,7 @@ Output_data_glink<size, big_endian>::do_write(Output_file* of)
 	  Address off = plt_addr - my_addr;
 
 	  if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
-	    gold_error(_("%s: linkage table error against `%s'"),
-		       ge->first->object()->name().c_str(),
+	    gold_error(_("linkage table error against `%s'"),
 		       ge->first->demangled_name().c_str());
 
 	  write_insn<big_endian>(p, addis_12_12 + ha(off)),	p += 4;
-- 
2.30.2