Parse a SECTIONS clause in a linker script.

1 files changed, 113 insertions, 0 deletions

diff --git a/gold/script-sections.h b/gold/script-sections.h
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+++ b/gold/script-sections.h
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+// script-sections.h -- linker script SECTIONS for gold   -*- C++ -*-
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This is for the support of the SECTIONS clause in linker scripts.
+
+#ifndef GOLD_SCRIPT_SECTIONS_H
+#define GOLD_SCRIPT_SECTIONS_H
+
+#include <cstdio>
+#include <vector>
+
+namespace gold
+{
+
+struct Parser_output_section_header;
+struct Parser_output_section_trailer;
+struct Input_section_spec;
+class Expression;
+class Sections_element;
+class Output_section_definition;
+
+class Script_sections
+{
+ public:
+  Script_sections();
+
+  // Start a SECTIONS clause.
+  void
+  start_sections();
+
+  // Finish a SECTIONS clause.
+  void
+  finish_sections();
+
+  // Return whether we ever saw a SECTIONS clause.  If we did, then
+  // all section layout needs to go through this class.
+  bool
+  saw_sections_clause() const
+  { return this->saw_sections_clause_; }
+
+  // Return whether we are currently processing a SECTIONS clause.
+  bool
+  in_sections_clause() const
+  { return this->in_sections_clause_; }
+
+  // Start processing entries for an output section.
+  void
+  start_output_section(const char* name, size_t namelen,
+		       const Parser_output_section_header*);
+
+  // Finish processing entries for an output section.
+  void
+  finish_output_section(const Parser_output_section_trailer*);
+
+  // Add a data item to the current output section.
+  void
+  add_data(int size, bool is_signed, Expression* val);
+
+  // Add a symbol to be defined.
+  void
+  add_symbol_assignment(const char* name, size_t length, Expression* value,
+			bool provide, bool hidden);
+  // Add an assertion.
+  void
+  add_assertion(Expression* check, const char* message, size_t messagelen);
+
+  // Add a setting for the fill value.
+  void
+  add_fill(Expression* val);
+
+  // Add an input section specification.
+  void
+  add_input_section(const Input_section_spec* spec, bool keep);
+
+  // Print the contents to the FILE.  This is for debugging.
+  void
+  print(FILE*) const;
+
+ private:
+  typedef std::vector<Sections_element*> Sections_elements;
+
+  // True if we ever saw a SECTIONS clause.
+  bool saw_sections_clause_;
+  // True if we are currently processing a SECTIONS clause.
+  bool in_sections_clause_;
+  // The list of elements in the SECTIONS clause.
+  Sections_elements* sections_elements_;
+  // The current output section, if there is one.
+  Output_section_definition* output_section_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_SCRIPT_SECTIONS_H