include/elf:

	* common.h (SHT_GNU_INCREMENTAL_INPUTS): Define.
elfcpp:
	* elfcpp.h (SHT_GNU_INCREMENTAL_INPUTS): Define.
gold:
	* incremental.cc: New file.
	* Makefile.am (CCFILES): Add incremental.cc.
	* Makefile.in: Rebuild.

1 files changed, 145 insertions, 0 deletions

diff --git a/gold/incremental.cc b/gold/incremental.cc
new file mode 100644
index 0000000..665822d
--- /dev/null
+++ b/gold/incremental.cc
@@ -0,0 +1,145 @@
+// inremental.cc -- incremental linking support for gold
+
+// Copyright 2009 Free Software Foundation, Inc.
+// Written by Mikolaj Zalewski <mikolajz@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.
+
+#include "gold.h"
+#include "elfcpp.h"
+
+using elfcpp::Convert;
+
+namespace gold {
+
+// Version information. Will change frequently during the development, later
+// we could think about backward (and forward?) compatibility.
+const int INCREMENTAL_LINK_VERSION = 1;
+
+namespace internal {
+
+// Header of the .gnu_incremental_input section.
+struct Incremental_input_header_data
+{
+  // Incremental linker version.
+  elfcpp::Elf_Word version;
+
+  // Numer of input files in the link.
+  elfcpp::Elf_Word input_file_count;
+
+  // Offset of command line options in .gnu_incremental_strtab.
+  elfcpp::Elf_Word command_line_offset;
+
+  // Padding.
+  elfcpp::Elf_Word reserved;
+};
+
+// Data stored in .gnu_incremental_input after the header for each of the
+// Incremental_input_header_data::input_file_count input entries.
+struct Incremental_input_entry_data
+{
+  // Offset of file name in .gnu_incremental_strtab section.
+  elfcpp::Elf_Word filename_offset;
+
+  // Offset of data in .gnu_incremental_input.
+  elfcpp::Elf_Word data_offset;
+
+  // Timestamp (in seconds).
+  elfcpp::Elf_Xword timestamp_sec;
+
+  // Nano-second part of timestamp (if supported).
+  elfcpp::Elf_Word timestamp_usec;
+
+  // Type of the input entry.
+  elfcpp::Elf_Half input_type;
+
+  // Padding.
+  elfcpp::Elf_Half reserved;
+};
+
+}
+
+// Accessors.
+
+// See internal::Incremental_input_header for fields descriptions.
+template<int size, bool big_endian>
+class Incremental_input_header_write
+{
+ public:
+  Incremental_input_header_write(unsigned char *p)
+    : p_(reinterpret_cast<internal::Incremental_input_header_data>(p))
+  { }
+
+  void
+  put_version(elfcpp::Elf_Word v)
+  { this->p_->version = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  input_file_count(elfcpp::Elf_Word v)
+  { this->p_->input_file_count = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  command_line_offset(elfcpp::Elf_Word v)
+  { this->p_->command_line_offset = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  reserved(elfcpp::Elf_Word v)
+  { this->p_->reserved = Convert<32, big_endian>::convert_host(v); }
+
+ private:
+  internal::Incremental_input_header_data* p_;
+};
+
+// See internal::Incremental_input_entry for fields descriptions.
+template<int size, bool big_endian>
+class Incremental_input_entry_write
+{
+ public:
+  Incremental_input_entry_write(unsigned char *p)
+    : p_(reinterpret_cast<internal::Incremental_input_entry_data>(p))
+  { }
+
+  void
+  put_filename_offset(elfcpp::Elf_Word v)
+  { this->p_->filename_offset = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  put_data_offset(elfcpp::Elf_Word v)
+  { this->p_->data_offset = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  put_timestamp_sec(elfcpp::Elf_Word v)
+  { this->p_->timestamp_sec = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  put_timestamp_usec(elfcpp::Elf_Word v)
+  { this->p_->timestamp_usec = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  put_input_type(elfcpp::Elf_Word v)
+  { this->p_->input_type = Convert<32, big_endian>::convert_host(v); }
+
+  void
+  put_reserved(elfcpp::Elf_Word v)
+  { this->p_->reserved = Convert<32, big_endian>::convert_host(v); }
+
+ private:
+  internal::Incremental_input_entry_data* p_;
+};
+
+} // End namespace gold.