gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gold / object.cc

diff --git a/gold/object.cc b/gold/object.cc
index 7930de66fe630f3f689297c307e004c23392c9e4..c486a2011d5c4d5167272ca83d93cd20f90bbf3d 100644 (file)
--- a/gold/object.cc
+++ b/gold/object.cc
@@ -1,6 +1,6 @@
 // object.cc -- support for an object file for linking in gold
 
-// Copyright (C) 2006-2018 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -1380,6 +1380,18 @@ Sized_relobj_file<size, big_endian>::layout_gnu_property_section(
     }
 }
 
+// This a copy of lto_section defined in GCC (lto-streamer.h)
+
+struct lto_section
+{
+  int16_t major_version;
+  int16_t minor_version;
+  unsigned char slim_object;
+
+  /* Flags is a private field that is not defined publicly.  */
+  uint16_t flags;
+};
+
 // Lay out the input sections.  We walk through the sections and check
 // whether they should be included in the link.  If they should, we
 // pass them to the Layout object, which will return an output section
@@ -1865,6 +1877,23 @@ Sized_relobj_file<size, big_endian>::do_layout(Symbol_table* symtab,
                debug_types_sections.push_back(i);
            }
        }
+
+      /* GCC uses .gnu.lto_.lto.<some_hash> as a LTO bytecode information
+        section.  */
+      const char *lto_section_name = ".gnu.lto_.lto.";
+      if (strncmp (name, lto_section_name, strlen (lto_section_name)) == 0)
+       {
+         section_size_type contents_len;
+         const unsigned char* pcontents
+           = this->section_contents(i, &contents_len, false);
+         if (contents_len >= sizeof(lto_section))
+           {
+             const lto_section* lsection
+               = reinterpret_cast<const lto_section*>(pcontents);
+             if (lsection->slim_object)
+               layout->set_lto_slim_object();
+           }
+       }
     }
 
   if (!is_pass_two)
@@ -2083,7 +2112,7 @@ template<int size, bool big_endian>
 void
 Sized_relobj_file<size, big_endian>::do_add_symbols(Symbol_table* symtab,
                                                    Read_symbols_data* sd,
-                                                   Layout*)
+                                                   Layout* layout)
 {
   if (sd->symbols == NULL)
     {
@@ -2102,6 +2131,11 @@ Sized_relobj_file<size, big_endian>::do_add_symbols(Symbol_table* symtab,
 
   this->symbols_.resize(symcount);
 
+  if (!parameters->options().relocatable()
+      && layout->is_lto_slim_object ())
+    gold_info(_("%s: plugin needed to handle lto object"),
+             this->name().c_str());
+
   const char* sym_names =
     reinterpret_cast<const char*>(sd->symbol_names->data());
   symtab->add_from_relobj(this,
@@ -2612,6 +2646,10 @@ Sized_relobj_file<size, big_endian>::do_finalize_local_symbols(
              lv->set_output_symtab_index(index);
              ++index;
            }
+         if (lv->is_ifunc_symbol()
+             && (lv->has_output_symtab_entry()
+                 || lv->needs_output_dynsym_entry()))
+           symtab->set_has_gnu_output();
          break;
        case CFLV_DISCARDED:
        case CFLV_ERROR: