Move .oat files to ELF format
Generates .oat in ELF file format using MCLinker
- Uses MCLinker IRBuilder to create a synthetic .o from OatWriter output.
- Uses new ElfFile for prelinking to support art image optimizations.
Adapted OatFile to load using dlopen, ElfFile, or memory, removing raw MemMap mechanism.
Changed image code to not assume oat data will be immediately after
image to allow space for ELF headers.
Passes test-art and works with installd.
Change-Id: Idc026eddb5de93f4b97490c405f3ed7b39589749
diff --git a/src/elf_writer.h b/src/elf_writer.h
new file mode 100644
index 0000000..0402c40
--- /dev/null
+++ b/src/elf_writer.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ELF_WRITER_H_
+#define ART_SRC_ELF_WRITER_H_
+
+#include "compiler.h"
+#include "os.h"
+
+namespace art {
+
+class ElfWriter {
+ public:
+ // Write an ELF file. Returns true on success, false on failure.
+ static bool Create(File* file, std::vector<uint8_t>& oat_contents, const Compiler& compiler);
+
+ // Fixup an ELF file so that that oat header will be loaded at oat_begin.
+ // Returns true on success, false on failure.
+ static bool Fixup(File* file, uintptr_t oat_data_begin);
+
+ // Looks up information about location of oat file in elf file container.
+ // Used for ImageWriter to perform memory layout.
+ static void GetOatElfInformation(File* file,
+ size_t& oat_loaded_size,
+ size_t& oat_data_offset);
+
+ private:
+ ElfWriter(const Compiler& compiler);
+ ~ElfWriter();
+
+ bool Write(std::vector<uint8_t>& oat_contents, File* elf_file);
+
+ // Fixup .dynamic d_ptr values for the expected base_address.
+ static bool FixupDynamic(ElfFile& elf_file, uintptr_t base_address);
+
+ // Fixup Elf32_Shdr p_vaddr to load at the desired address.
+ static bool FixupSectionHeaders(ElfFile& elf_file,uintptr_t base_address);
+
+ // Fixup Elf32_Phdr p_vaddr to load at the desired address.
+ static bool FixupProgramHeaders(ElfFile& elf_file,uintptr_t base_address);
+
+ // Fixup symbol table
+ static bool FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic);
+
+ const Compiler* compiler_;
+};
+
+} // namespace art
+
+#endif // ART_SRC_ELF_WRITER_H_