Merge "Remove relocation_packer."
diff --git a/tools/relocation_packer/Android.bp b/tools/relocation_packer/Android.bp
deleted file mode 100644
index cd6053a..0000000
--- a/tools/relocation_packer/Android.bp
+++ /dev/null
@@ -1,86 +0,0 @@
-//
-// Copyright (C) 2015 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.
-//
-
-cc_defaults {
- name: "relocation_packer_flags",
- cflags: [
- "-Wall",
- "-Werror",
- ],
- cppflags: [
- "-Wextra",
- "-Wunused",
- "-Wold-style-cast",
- ],
-
- target: {
- darwin: {
- enabled: false,
- },
- },
-}
-
-cc_library_host_static {
- name: "lib_relocation_packer",
- defaults: ["relocation_packer_flags"],
- srcs: [
- "src/debug.cc",
- "src/delta_encoder.cc",
- "src/elf_file.cc",
- "src/packer.cc",
- "src/sleb128.cc",
- ],
-
- static_libs: [
- "libelf",
- "libz",
- ],
-}
-
-cc_binary_host {
- name: "relocation_packer",
- defaults: ["relocation_packer_flags"],
-
- srcs: ["src/main.cc"],
- static_libs: [
- "lib_relocation_packer",
- "libelf",
- "libz",
- "libbase",
- ],
-
- // Statically linking libc++ to make it work from prebuilts
- stl: "libc++_static",
-}
-
-cc_test_host {
- name: "relocation_packer_unit_tests",
- defaults: ["relocation_packer_flags"],
-
- srcs: [
- "src/debug_unittest.cc",
- "src/delta_encoder_unittest.cc",
- "src/elf_file_unittest.cc",
- "src/sleb128_unittest.cc",
- "src/packer_unittest.cc",
- ],
-
- static_libs: [
- "lib_relocation_packer",
- "libelf",
- "libz",
- ],
-}
diff --git a/tools/relocation_packer/Android.mk b/tools/relocation_packer/Android.mk
deleted file mode 100644
index 9905657..0000000
--- a/tools/relocation_packer/Android.mk
+++ /dev/null
@@ -1,44 +0,0 @@
-#
-# Copyright (C) 2015 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.
-#
-
-LOCAL_PATH := $(call my-dir)
-
-ifeq ($(HOST_OS),linux)
-
-# $(1) library name
-define copy-test-library
-include $(CLEAR_VARS)
-LOCAL_IS_HOST_MODULE := true
-LOCAL_MODULE := $(1)
-LOCAL_MODULE_CLASS := SHARED_LIBRARIES
-LOCAL_MODULE_PATH := $(HOST_OUT_EXECUTABLES)
-LOCAL_STRIP_MODULE := false
-LOCAL_SRC_FILES := test_data/$(1)
-include $(BUILD_PREBUILT)
-endef
-
-$(eval $(call copy-test-library,elf_file_unittest_relocs_arm32.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_arm32_packed.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_arm64.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_arm64_packed.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_ia32.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_ia32_packed.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_x64.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_x64_packed.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_mips32.so))
-$(eval $(call copy-test-library,elf_file_unittest_relocs_mips32_packed.so))
-
-endif
diff --git a/tools/relocation_packer/LICENSE b/tools/relocation_packer/LICENSE
deleted file mode 100644
index 972bb2e..0000000
--- a/tools/relocation_packer/LICENSE
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/tools/relocation_packer/src/debug.cc b/tools/relocation_packer/src/debug.cc
deleted file mode 100644
index 29d7ab0..0000000
--- a/tools/relocation_packer/src/debug.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "debug.h"
-
-#include <stdlib.h>
-#include <iostream>
-#include <string>
-
-namespace relocation_packer {
-
-// Construct a new message logger. Prints if level is less than or equal to
-// the level set with SetVerbose() and predicate is true.
-Logger::Logger(Severity severity, int level, bool predicate) {
- severity_ = severity;
- level_ = level;
- predicate_ = predicate;
-}
-
-// On destruction, flush and print the strings accumulated. Abort if FATAL.
-Logger::~Logger() {
- if (predicate_) {
- if (level_ <= max_level_) {
- std::ostream* log = severity_ == INFO ? info_stream_ : error_stream_;
- std::string tag;
- switch (severity_) {
- case INFO: tag = "INFO"; break;
- case WARNING: tag = "WARNING"; break;
- case ERROR: tag = "ERROR"; break;
- case FATAL: tag = "FATAL"; break;
- }
- stream_.flush();
- *log << tag << ": " << stream_.str() << std::endl;
- }
- if (severity_ == FATAL)
- abort();
- }
-}
-
-// Reset to initial state.
-void Logger::Reset() {
- max_level_ = -1;
- info_stream_ = &std::cout;
- error_stream_ = &std::cerr;
-}
-
-// Verbosity. Not thread-safe.
-int Logger::max_level_ = -1;
-
-// Logging streams. Not thread-safe.
-std::ostream* Logger::info_stream_ = &std::cout;
-std::ostream* Logger::error_stream_ = &std::cerr;
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/debug.h b/tools/relocation_packer/src/debug.h
deleted file mode 100644
index fdfb795..0000000
--- a/tools/relocation_packer/src/debug.h
+++ /dev/null
@@ -1,118 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Logging and checks. Avoids a dependency on base.
-//
-// LOG(tag) prints messages. Tags are INFO, WARNING, ERROR and FATAL.
-// INFO prints to stdout, the others to stderr. FATAL aborts after printing.
-//
-// LOG_IF(tag, predicate) logs if predicate evaluates to true, else silent.
-//
-// VLOG(level) logs INFO messages where level is less than or equal to the
-// verbosity level set with SetVerbose().
-//
-// VLOG_IF(level, predicate) logs INFO if predicate evaluates to true,
-// else silent.
-//
-// CHECK(predicate) logs a FATAL error if predicate is false.
-// NOTREACHED() always aborts.
-// Log streams can be changed with SetStreams(). Logging is not thread-safe.
-//
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_DEBUG_H_
-#define TOOLS_RELOCATION_PACKER_SRC_DEBUG_H_
-
-#include <limits.h>
-#include <ostream>
-#include <sstream>
-
-namespace relocation_packer {
-
-class Logger {
- public:
- enum Severity {INFO = 0, WARNING, ERROR, FATAL};
-
- // Construct a new message logger. Prints if level is less than or
- // equal to the level set with SetVerbose() and predicate is true.
- // |severity| is an enumerated severity.
- // |level| is the verbosity level.
- // |predicate| controls if the logger prints or is silent.
- Logger(Severity severity, int level, bool predicate);
-
- // On destruction, flush and print the strings accumulated in stream_.
- ~Logger();
-
- // Return the stream for this logger.
- std::ostream& GetStream() { return stream_; }
-
- // Set verbosity level. Messages with a level less than or equal to
- // this level are printed, others are discarded. Static, not thread-safe.
- static void SetVerbose(int level) { max_level_ = level; }
-
- // Set info and error logging streams. Static, not thread-safe.
- static void SetStreams(std::ostream* info_stream,
- std::ostream* error_stream) {
- info_stream_ = info_stream;
- error_stream_ = error_stream;
- }
-
- // Reset to initial state.
- static void Reset();
-
- private:
- // Message severity, verbosity level, and predicate.
- Severity severity_;
- int level_;
- bool predicate_;
-
- // String stream, accumulates message text.
- std::ostringstream stream_;
-
- // Verbosity for INFO messages. Not thread-safe.
- static int max_level_;
-
- // Logging streams. Not thread-safe.
- static std::ostream* info_stream_;
- static std::ostream* error_stream_;
-};
-
-} // namespace relocation_packer
-
-// Make logging severities visible globally.
-typedef relocation_packer::Logger::Severity LogSeverity;
-
-// LOG(severity) prints a message with the given severity, and aborts if
-// severity is FATAL. LOG_IF(severity, predicate) does the same but only if
-// predicate is true. INT_MIN is guaranteed to be less than or equal to
-// any verbosity level.
-#define LOG(severity) \
- (relocation_packer::Logger(relocation_packer::Logger::severity, INT_MIN, \
- true) \
- .GetStream())
-#define LOG_IF(severity, predicate) \
- (relocation_packer::Logger(relocation_packer::Logger::severity, INT_MIN, \
- (predicate)) \
- .GetStream())
-
-// VLOG(level) prints its message as INFO if level is less than or equal to
-// the current verbosity level.
-#define VLOG(level) \
- (relocation_packer::Logger(relocation_packer::Logger::INFO, (level), true) \
- .GetStream())
-#define VLOG_IF(level, predicate) \
- (relocation_packer::Logger(relocation_packer::Logger::INFO, (level), \
- (predicate)) \
- .GetStream())
-
-// CHECK(predicate) fails with a FATAL log message if predicate is false.
-#define CHECK(predicate) (LOG_IF(FATAL, !(predicate)) \
- << __FILE__ << ":" << __LINE__ << ": " \
- << __FUNCTION__ << ": CHECK '" #predicate "' failed")
-
-// NOTREACHED() always fails with a FATAL log message.
-#define NOTREACHED(_) (LOG(FATAL) \
- << __FILE__ << ":" << __LINE__ << ": " \
- << __FUNCTION__ << ": NOTREACHED() hit")
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_DEBUG_H_
diff --git a/tools/relocation_packer/src/debug_unittest.cc b/tools/relocation_packer/src/debug_unittest.cc
deleted file mode 100644
index b31e2ae..0000000
--- a/tools/relocation_packer/src/debug_unittest.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "debug.h"
-
-#include <sstream>
-#include "gtest/gtest.h"
-
-namespace relocation_packer {
-
-TEST(Debug, Log) {
- Logger::Reset();
- std::ostringstream info;
- std::ostringstream error;
- Logger::SetStreams(&info, &error);
-
- LOG(INFO) << "INFO log message";
- LOG(WARNING) << "WARNING log message";
- LOG(ERROR) << "ERROR log message";
-
- EXPECT_EQ("INFO: INFO log message\n", info.str());
- EXPECT_EQ("WARNING: WARNING log message\n"
- "ERROR: ERROR log message\n", error.str());
- Logger::Reset();
-}
-
-TEST(Debug, LogIf) {
- Logger::Reset();
- std::ostringstream info;
- std::ostringstream error;
- Logger::SetStreams(&info, &error);
-
- LOG_IF(INFO, true) << "INFO log message";
- LOG_IF(INFO, false) << "INFO log message, SHOULD NOT PRINT";
- LOG_IF(WARNING, true) << "WARNING log message";
- LOG_IF(WARNING, false) << "WARNING log message, SHOULD NOT PRINT";
- LOG_IF(ERROR, true) << "ERROR log message";
- LOG_IF(ERROR, false) << "ERROR log message, SHOULD NOT PRINT";
- LOG_IF(FATAL, false) << "FATAL log message, SHOULD NOT PRINT";
-
- EXPECT_EQ("INFO: INFO log message\n", info.str());
- EXPECT_EQ("WARNING: WARNING log message\n"
- "ERROR: ERROR log message\n", error.str());
- Logger::Reset();
-}
-
-TEST(Debug, Vlog) {
- Logger::Reset();
- std::ostringstream info;
- std::ostringstream error;
- Logger::SetStreams(&info, &error);
-
- VLOG(0) << "VLOG 0 INFO log message, SHOULD NOT PRINT";
- VLOG(1) << "VLOG 1 INFO log message, SHOULD NOT PRINT";
- VLOG(2) << "VLOG 2 INFO log message, SHOULD NOT PRINT";
-
- EXPECT_EQ("", info.str());
- EXPECT_EQ("", error.str());
-
- Logger::SetVerbose(1);
-
- VLOG(0) << "VLOG 0 INFO log message";
- VLOG(1) << "VLOG 1 INFO log message";
- VLOG(2) << "VLOG 2 INFO log message, SHOULD NOT PRINT";
-
- EXPECT_EQ("INFO: VLOG 0 INFO log message\n"
- "INFO: VLOG 1 INFO log message\n", info.str());
- EXPECT_EQ("", error.str());
- Logger::Reset();
-}
-
-TEST(Debug, VlogIf) {
- Logger::Reset();
- std::ostringstream info;
- std::ostringstream error;
- Logger::SetStreams(&info, &error);
-
- VLOG_IF(0, true) << "VLOG 0 INFO log message, SHOULD NOT PRINT";
- VLOG_IF(1, true) << "VLOG 1 INFO log message, SHOULD NOT PRINT";
- VLOG_IF(2, true) << "VLOG 2 INFO log message, SHOULD NOT PRINT";
-
- EXPECT_EQ("", info.str());
- EXPECT_EQ("", error.str());
-
- Logger::SetVerbose(1);
-
- VLOG_IF(0, true) << "VLOG 0 INFO log message";
- VLOG_IF(0, false) << "VLOG 0 INFO log message, SHOULD NOT PRINT";
- VLOG_IF(1, true) << "VLOG 1 INFO log message";
- VLOG_IF(1, false) << "VLOG 1 INFO log message, SHOULD NOT PRINT";
- VLOG_IF(2, true) << "VLOG 2 INFO log message, SHOULD NOT PRINT";
- VLOG_IF(2, false) << "VLOG 2 INFO log message, SHOULD NOT PRINT";
-
- EXPECT_EQ("INFO: VLOG 0 INFO log message\n"
- "INFO: VLOG 1 INFO log message\n", info.str());
- EXPECT_EQ("", error.str());
- Logger::Reset();
-}
-
-TEST(DebugDeathTest, Fatal) {
- ::testing::FLAGS_gtest_death_test_style = "threadsafe";
- Logger::Reset();
- EXPECT_DEATH(LOG(FATAL) << "FATAL log message", "FATAL: FATAL log message");
- EXPECT_DEATH(
- LOG_IF(FATAL, true) << "FATAL log message", "FATAL: FATAL log message");
-}
-
-TEST(DebugDeathTest, Check) {
- ::testing::FLAGS_gtest_death_test_style = "threadsafe";
- Logger::Reset();
- CHECK(0 == 0);
- EXPECT_DEATH(CHECK(0 == 1), "FATAL: .*:.*: .*: CHECK '0 == 1' failed");
-}
-
-TEST(DebugDeathTest, NotReached) {
- ::testing::FLAGS_gtest_death_test_style = "threadsafe";
- Logger::Reset();
- EXPECT_DEATH(NOTREACHED(), "FATAL: .*:.*: .*: NOTREACHED\\(\\) hit");
-}
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/delta_encoder.cc b/tools/relocation_packer/src/delta_encoder.cc
deleted file mode 100644
index 8349d7c..0000000
--- a/tools/relocation_packer/src/delta_encoder.cc
+++ /dev/null
@@ -1,307 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "delta_encoder.h"
-
-#include <vector>
-
-#include "debug.h"
-
-static constexpr uint32_t RELOCATION_GROUPED_BY_INFO_FLAG = 1;
-static constexpr uint32_t RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2;
-static constexpr uint32_t RELOCATION_GROUPED_BY_ADDEND_FLAG = 4;
-static constexpr uint32_t RELOCATION_GROUP_HAS_ADDEND_FLAG = 8;
-
-static bool is_relocation_grouped_by_info(uint64_t flags) {
- return (flags & RELOCATION_GROUPED_BY_INFO_FLAG) != 0;
-}
-
-static bool is_relocation_grouped_by_offset_delta(uint64_t flags) {
- return (flags & RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG) != 0;
-}
-
-static bool is_relocation_grouped_by_addend(uint64_t flags) {
- return (flags & RELOCATION_GROUPED_BY_ADDEND_FLAG) != 0;
-}
-
-static bool is_relocation_group_has_addend(uint64_t flags) {
- return (flags & RELOCATION_GROUP_HAS_ADDEND_FLAG) != 0;
-}
-
-namespace relocation_packer {
-
-// Encode relocations into a delta encoded (packed) representation.
-template <typename ELF>
-void RelocationDeltaCodec<ELF>::Encode(const std::vector<ElfRela>& relocations,
- std::vector<ElfAddr>* packed) {
- if (relocations.size() == 0)
- return;
-
- // Start with the relocation count, then append groups
- // TODO(dimitry): we might want to move it to DT_ANDROID_RELCOUNT section
- packed->push_back(static_cast<ElfAddr>(relocations.size()));
-
- // lets write starting offset (offset of the first reloc - first delta)
- ElfAddr start_offset = relocations.size() > 1 ?
- relocations[0].r_offset - (relocations[1].r_offset - relocations[0].r_offset) :
- relocations[0].r_offset;
-
- packed->push_back(start_offset);
-
- // this one is used to calculate delta
- ElfAddr previous_addend = 0;
- ElfAddr previous_offset = start_offset;
-
- for (size_t group_start = 0; group_start < relocations.size(); ) {
- ElfAddr group_flags = 0;
- ElfAddr group_offset_delta = 0;
- ElfAddr group_addend = 0;
- ElfAddr group_info = 0;
-
- ElfAddr group_size = 0;
-
- DetectGroup(relocations, group_start, previous_offset, &group_size, &group_flags,
- &group_offset_delta, &group_info, &group_addend);
-
- // write the group header
- packed->push_back(group_size);
- packed->push_back(group_flags);
-
- if (is_relocation_grouped_by_offset_delta(group_flags)) {
- packed->push_back(group_offset_delta);
- }
-
- if (is_relocation_grouped_by_info(group_flags)) {
- packed->push_back(group_info);
- }
-
- if (is_relocation_group_has_addend(group_flags) &&
- is_relocation_grouped_by_addend(group_flags)) {
- packed->push_back(group_addend - previous_addend);
- previous_addend = group_addend;
- }
-
- for (size_t i = 0; i < static_cast<size_t>(group_size); ++i) {
- CHECK((group_start + i) < relocations.size());
- const ElfRela* relocation = &relocations[group_start + i];
-
- if (!is_relocation_grouped_by_offset_delta(group_flags)) {
- packed->push_back(relocation->r_offset - previous_offset);
- }
- previous_offset = relocation->r_offset;
-
- if (!is_relocation_grouped_by_info(group_flags)) {
- packed->push_back(relocation->r_info);
- }
-
- if (is_relocation_group_has_addend(group_flags) &&
- !is_relocation_grouped_by_addend(group_flags)) {
- packed->push_back(relocation->r_addend - previous_addend);
- previous_addend = relocation->r_addend;
- }
- }
-
- // If the relocation group does not have an addend - reset it to 0
- // to simplify addend computation for the group following this one.
- if (!is_relocation_group_has_addend(group_flags)) {
- previous_addend = 0;
- }
-
- group_start += group_size;
- }
-}
-
-// Decode relocations from a delta encoded (packed) representation.
-template <typename ELF>
-void RelocationDeltaCodec<ELF>::Decode(const std::vector<ElfAddr>& packed,
- std::vector<ElfRela>* relocations) {
- if (packed.size() < 5) {
- return;
- }
-
- size_t ndx = 0;
- ElfAddr current_count = 0;
- ElfAddr total_count = packed[ndx++];
-
- ElfAddr offset = packed[ndx++];
- ElfAddr info = 0;
- ElfAddr addend = 0;
-
- while(current_count < total_count) {
- // read group
- ElfAddr group_size = packed[ndx++];
- ElfAddr group_flags = packed[ndx++];
- ElfAddr group_offset_delta = 0;
-
- if (is_relocation_grouped_by_offset_delta(group_flags)) {
- group_offset_delta = packed[ndx++];
- }
-
- if (is_relocation_grouped_by_info(group_flags)) {
- info = packed[ndx++];
- }
-
- if (is_relocation_group_has_addend(group_flags) &&
- is_relocation_grouped_by_addend(group_flags)) {
- addend += packed[ndx++];
- }
-
- // now read not grouped info
- for (ElfAddr i = 0; i<group_size; ++i) {
- if (is_relocation_grouped_by_offset_delta(group_flags)) {
- offset += group_offset_delta;
- } else {
- offset += packed[ndx++];
- }
-
- if (!is_relocation_grouped_by_info(group_flags)) {
- info = packed[ndx++];
- }
-
- if (is_relocation_group_has_addend(group_flags) &&
- !is_relocation_grouped_by_addend(group_flags)) {
- addend += packed[ndx++];
- }
-
- ElfRela reloc;
- reloc.r_offset = offset;
- reloc.r_info = info;
- reloc.r_addend = is_relocation_group_has_addend(group_flags) ? addend : 0;
- relocations->push_back(reloc);
- }
-
- if (!is_relocation_group_has_addend(group_flags)) {
- addend = 0;
- }
-
- current_count += group_size;
- }
-}
-
-// This function detects a way to group reloc_one and reloc_two, sets up group_flags
-// and initializes values for corresponding group_ fields. For example if relocations
-// can be grouped by r_info the function will set group_info variable.
-template <typename ELF>
-void RelocationDeltaCodec<ELF>::DetectGroupFields(const ElfRela& reloc_one,
- const ElfRela& reloc_two,
- ElfAddr current_offset_delta,
- ElfAddr* group_flags,
- ElfAddr* group_offset_delta,
- ElfAddr* group_info,
- ElfAddr* group_addend) {
- *group_flags = 0;
-
- const ElfAddr offset_delta = static_cast<ElfAddr>(reloc_two.r_offset) -
- static_cast<ElfAddr>(reloc_one.r_offset);
-
- if (offset_delta == current_offset_delta) {
- *group_flags |= RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG;
- if (group_offset_delta != nullptr) {
- *group_offset_delta = current_offset_delta;
- }
- }
-
- if (reloc_one.r_info == reloc_two.r_info) {
- *group_flags |= RELOCATION_GROUPED_BY_INFO_FLAG;
- if (group_info != nullptr) {
- *group_info = reloc_one.r_info;
- }
- }
-
- if (reloc_one.r_addend != 0 || reloc_two.r_addend != 0) {
- *group_flags |= RELOCATION_GROUP_HAS_ADDEND_FLAG;
- if (reloc_one.r_addend == reloc_two.r_addend) {
- *group_flags |= RELOCATION_GROUPED_BY_ADDEND_FLAG;
- if (group_addend != nullptr) {
- *group_addend = reloc_one.r_addend;
- }
- }
- }
-}
-
-// This function is used to detect if there is better group available
-// during RelocationDeltaCodec<ELF>::DetectGroup processing.
-// Current implementation prefers having groups without addend (== zero addend)
-// to any other groups field with the ratio 3:1. This is because addend tends
-// to be more unevenly distributed than other fields.
-static uint32_t group_weight(uint64_t flags) {
- uint32_t weight = 0;
- if (!is_relocation_group_has_addend(flags)) {
- weight += 3;
- } else if (is_relocation_grouped_by_addend(flags)) {
- weight += 1;
- }
-
- if (is_relocation_grouped_by_offset_delta(flags)) {
- weight += 1;
- }
-
- if (is_relocation_grouped_by_info(flags)) {
- weight += 1;
- }
-
- return weight;
-}
-
-template <typename ELF>
-void RelocationDeltaCodec<ELF>::DetectGroup(const std::vector<ElfRela>& relocations,
- size_t group_starts_with, ElfAddr previous_offset,
- ElfAddr* group_size, ElfAddr* group_flags,
- ElfAddr* group_offset_delta, ElfAddr* group_info,
- ElfAddr* group_addend) {
- CHECK(group_starts_with < relocations.size());
- CHECK(group_flags != nullptr);
-
- const ElfRela& reloc_one = relocations[group_starts_with++];
- if (group_starts_with == relocations.size()) {
- *group_flags = reloc_one.r_addend == 0 ? 0 : RELOCATION_GROUP_HAS_ADDEND_FLAG;
- *group_size = 1;
- return;
- }
-
- const ElfAddr offset_delta = reloc_one.r_offset - previous_offset;
-
- // detect group_flags
- DetectGroupFields(reloc_one, relocations[group_starts_with], offset_delta, group_flags,
- group_offset_delta, group_info, group_addend);
-
- if (group_starts_with + 1 == relocations.size()) {
- *group_size = 2;
- return;
- }
-
- ElfAddr cnt = 1;
- for (size_t i = group_starts_with; i < relocations.size() - 1; ++i) {
- ElfAddr candidate_flags;
- // check if next group (reloc_current; reloc_next) has better grouped_by flags
- DetectGroupFields(relocations[i], relocations[i+1], offset_delta, &candidate_flags,
- nullptr, nullptr, nullptr);
-
- if (group_weight(*group_flags) < group_weight(candidate_flags)) {
- break;
- }
- cnt++;
-
- if (candidate_flags != *group_flags) {
- break;
- }
-
- if (i + 1 == relocations.size() - 1) { // last one
- cnt++;
- }
- }
-
- // if as a result of checking candidates we ended up with cnt == 1
- // reset flags to the default state
- if (cnt == 1) {
- *group_flags = reloc_one.r_addend == 0 ? 0 : RELOCATION_GROUP_HAS_ADDEND_FLAG;
- }
-
- *group_size = cnt;
-}
-
-template class RelocationDeltaCodec<ELF32_traits>;
-template class RelocationDeltaCodec<ELF64_traits>;
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/delta_encoder.h b/tools/relocation_packer/src/delta_encoder.h
deleted file mode 100644
index 46c324c..0000000
--- a/tools/relocation_packer/src/delta_encoder.h
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Delta encode and decode REL/RELA section of elf file.
-//
-// The encoded data format is sequence of elements of ElfAddr type (unsigned long):
-//
-// [00] relocation_count - the total count of relocations
-// [01] initial r_offset - this is initial r_offset for the
-// relocation table.
-// followed by group structures:
-// [02] group
-// ...
-// [nn] group
-
-// the generalized format of the group is (! - always present ? - depends on group_flags):
-// --------------
-// ! group_size
-// ! group_flags
-// ? group_r_offset_delta when RELOCATION_GROUPED_BY_OFFSET_DELTA flag is set
-// ? group_r_info when RELOCATION_GROUPED_BY_INFO flag is set
-// ? group_r_addend_group_delta when RELOCATION_GROUP_HAS_ADDEND and RELOCATION_GROUPED_BY_ADDEND
-// flag is set
-//
-// The group description is followed by individual relocations.
-// please note that there is a case when individual relocation
-// section could be empty - that is if every field ends up grouped.
-//
-// The format for individual relocations section is:
-// ? r_offset_delta - when RELOCATION_GROUPED_BY_OFFSET_DELTA is not set
-// ? r_info - when RELOCATION_GROUPED_BY_INFO flag is not set
-// ? r_addend_delta - RELOCATION_GROUP_HAS_ADDEND is set and RELOCATION_GROUPED_BY_ADDEND is not set
-//
-// For example lets pack the following relocations:
-//
-// Relocation section '.rela.dyn' at offset 0xbf58 contains 939 entries:
-// Offset Info Type Symbol's Value Symbol's Name + Addend
-// 00000000000a2178 0000000000000403 R_AARCH64_RELATIVE 177a8
-// 00000000000a2180 0000000000000403 R_AARCH64_RELATIVE 177cc
-// 00000000000a2188 0000000000000403 R_AARCH64_RELATIVE 177e0
-// 00000000000a2190 0000000000000403 R_AARCH64_RELATIVE 177f4
-// 00000000000a2198 0000000000000403 R_AARCH64_RELATIVE 17804
-// 00000000000a21a0 0000000000000403 R_AARCH64_RELATIVE 17818
-// 00000000000a21a8 0000000000000403 R_AARCH64_RELATIVE 1782c
-// 00000000000a21b0 0000000000000403 R_AARCH64_RELATIVE 17840
-// 00000000000a21b8 0000000000000403 R_AARCH64_RELATIVE 17854
-// 00000000000a21c0 0000000000000403 R_AARCH64_RELATIVE 17868
-// 00000000000a21c8 0000000000000403 R_AARCH64_RELATIVE 1787c
-// 00000000000a21d0 0000000000000403 R_AARCH64_RELATIVE 17890
-// 00000000000a21d8 0000000000000403 R_AARCH64_RELATIVE 178a4
-// 00000000000a21e8 0000000000000403 R_AARCH64_RELATIVE 178b8
-//
-// The header is going to be
-// [00] 14 <- count
-// [01] 0x00000000000a2170 <- initial relocation (first relocation - delta,
-// the delta is 8 in this case)
-// -- starting the first and only group
-// [03] 14 <- group size
-// [03] 0xb <- flags RELOCATION_GROUP_HAS_ADDEND | RELOCATION_GROUPED_BY_OFFSET_DELTA
-// | RELOCATION_GROUPED_BY_INFO
-// [04] 8 <- offset delta
-// [05] 0x403 <- r_info
-// -- end of group definition, starting list of r_addend deltas
-// [06] 0x177a8
-// [07] 0x24 = 177cc - 177a8
-// [08] 0x14 = 177e0 - 177cc
-// [09] 0x14 = 177f4 - 177e0
-// [10] 0x10 = 17804 - 177f4
-// [11] 0x14 = 17818 - 17804
-// [12] 0x14 = 1782c - 17818
-// [13] 0x14 = 17840 - 1782c
-// [14] 0x14 = 17854 - 17840
-// [15] 0x14 = 17868 - 17854
-// [16] 0x14 = 1787c - 17868
-// [17] 0x14 = 17890 - 1787c
-// [18] 0x14 = 178a4 - 17890
-// [19] 0x14 = 178b8 - 178a4
-// -- the end.
-
-// TODO (dimitry): consider using r_addend_group_delta in the way we use group offset delta, it can
-// save us more bytes...
-
-// The input ends when sum(group_size) == relocation_count
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_DELTA_ENCODER_H_
-#define TOOLS_RELOCATION_PACKER_SRC_DELTA_ENCODER_H_
-
-#include <vector>
-
-#include "elf.h"
-#include "elf_traits.h"
-
-namespace relocation_packer {
-
-// A RelocationDeltaCodec packs vectors of relative relocations with
-// addends into more compact forms, and unpacks them to reproduce the
-// pre-packed data.
-template <typename ELF>
-class RelocationDeltaCodec {
- public:
- typedef typename ELF::Addr ElfAddr;
- typedef typename ELF::Rela ElfRela;
-
- // Encode relocations with addends into a more compact form.
- // |relocations| is a vector of relative relocation with addend structs.
- // |packed| is the vector of packed words into which relocations are packed.
- static void Encode(const std::vector<ElfRela>& relocations,
- std::vector<ElfAddr>* packed);
-
- // Decode relative relocations with addends from their more compact form.
- // |packed| is the vector of packed relocations.
- // |relocations| is a vector of unpacked relative relocations.
- static void Decode(const std::vector<ElfAddr>& packed,
- std::vector<ElfRela>* relocations);
-
- private:
- static void DetectGroup(const std::vector<ElfRela>& relocations,
- size_t group_starts_with, ElfAddr previous_offset,
- ElfAddr* group_size, ElfAddr* group_flags,
- ElfAddr* group_offset_delta, ElfAddr* group_info,
- ElfAddr* group_addend);
-
- static void DetectGroupFields(const ElfRela& reloc_one, const ElfRela& reloc_two,
- ElfAddr current_offset_delta, ElfAddr* group_flags,
- ElfAddr* group_offset_delta, ElfAddr* group_info,
- ElfAddr* group_addend);
-};
-
-} // namespace relocation_packer
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_DELTA_ENCODER_H_
diff --git a/tools/relocation_packer/src/delta_encoder_unittest.cc b/tools/relocation_packer/src/delta_encoder_unittest.cc
deleted file mode 100644
index 06d9c96..0000000
--- a/tools/relocation_packer/src/delta_encoder_unittest.cc
+++ /dev/null
@@ -1,223 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "delta_encoder.h"
-
-#include <vector>
-#include "elf.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-template <typename T>
-void AddRelocation(uint32_t addr,
- uint32_t info,
- int32_t addend,
- std::vector<T>* relocations) {
- T relocation;
- relocation.r_offset = addr;
- relocation.r_info = info;
- relocation.r_addend = addend;
- relocations->push_back(relocation);
-}
-
-template <typename T>
-bool CheckRelocation(uint32_t addr,
- uint32_t info,
- int32_t addend,
- const T& relocation) {
- return relocation.r_offset == addr &&
- relocation.r_info == info &&
- relocation.r_addend == addend;
-}
-
-} // namespace
-
-namespace relocation_packer {
-
-template <typename ELF>
-static void encode() {
- std::vector<typename ELF::Rela> relocations;
- std::vector<typename ELF::Addr> packed;
-
- RelocationDeltaCodec<ELF> codec;
-
- codec.Encode(relocations, &packed);
-
- ASSERT_EQ(0U, packed.size());
-
- // Initial relocation.
- AddRelocation(0xf00d0000, 11U, 10000, &relocations);
-
- codec.Encode(relocations, &packed);
-
- // size of reloc table, size of group, flags, 3 fields, zero
- EXPECT_EQ(7U, packed.size());
- // One pair present.
- size_t ndx = 0;
- EXPECT_EQ(1U, packed[ndx++]);
- EXPECT_EQ(0xf00d0000, packed[ndx++]);
- EXPECT_EQ(1U, packed[ndx++]); // group_size
- EXPECT_EQ(8U, packed[ndx++]); // flags
- // Delta from the neutral element is zero
- EXPECT_EQ(0U, packed[ndx++]); // offset_delta
- EXPECT_EQ(11U, packed[ndx++]); // info
- EXPECT_EQ(10000U, packed[ndx++]); // addend_delta
-
- // Add a second relocation, 4 byte offset delta, 12 byte addend delta.
- // same info
- AddRelocation(0xf00d0004, 11U, 10012, &relocations);
-
- packed.clear();
- codec.Encode(relocations, &packed);
-
- ndx = 0;
- EXPECT_EQ(8U, packed.size());
-
- EXPECT_EQ(2U, packed[ndx++]); // relocs count
- EXPECT_EQ(0xf00cfffc, packed[ndx++]); // initial offset
- EXPECT_EQ(2U, packed[ndx++]); // group count
- EXPECT_EQ(11U, packed[ndx++]); // flags
- EXPECT_EQ(4U, packed[ndx++]); // group offset delta
- EXPECT_EQ(11U, packed[ndx++]); // info
-
- EXPECT_EQ(10000U, packed[ndx++]); // addend delta
- EXPECT_EQ(12U, packed[ndx++]); // addend delta
-
- // Add a third relocation, 4 byte offset delta, 12 byte addend delta.
- // different info
- AddRelocation(0xf00d0008, 41U, 10024, &relocations);
-
- // Add three more relocations, 8 byte offset deltas, -24 byte addend deltas.
- AddRelocation(0xf00d0010, 42U, 10000, &relocations);
- AddRelocation(0xf00d0018, 42U, 9976, &relocations);
- AddRelocation(0xf00d0020, 42U, 9952, &relocations);
-
- AddRelocation(0xf00d2028, 1042U, 0, &relocations);
- AddRelocation(0xf00d2030, 3442U, 0, &relocations);
-
- packed.clear();
- codec.Encode(relocations, &packed);
-
- ndx = 0;
- EXPECT_EQ(26U, packed.size());
- // Total number of relocs
- EXPECT_EQ(8U, packed[ndx++]);
- EXPECT_EQ(0xf00cfffc, packed[ndx++]);
- // 2 in first group
- EXPECT_EQ(2U, packed[ndx++]);
- EXPECT_EQ(11U, packed[ndx++]); //flags
- EXPECT_EQ(4U, packed[ndx++]); // group offset delta
- EXPECT_EQ(11U, packed[ndx++]); // info
-
- // Initial relocation.
- EXPECT_EQ(10000U, packed[ndx++]); // addend delta
- // Two relocations, 4 byte offset deltas, 12 byte addend deltas.
- EXPECT_EQ(12U, packed[ndx++]); // addend delta
-
- // second group has only one reloc
- EXPECT_EQ(1U, packed[ndx++]); // count
- EXPECT_EQ(8U, packed[ndx++]); // flags
-
- EXPECT_EQ(4U, packed[ndx++]); // offset delta
- EXPECT_EQ(41U, packed[ndx++]); // info
- EXPECT_EQ(12U, packed[ndx++]); // addend delta
-
- // next - 3 relocs grouped by info
- EXPECT_EQ(3U, packed[ndx++]); // count
- EXPECT_EQ(11U, packed[ndx++]); // flags
- EXPECT_EQ(8U, packed[ndx++]); // group offset delta
- EXPECT_EQ(42U, packed[ndx++]); // info
- // Three relocations, 8 byte offset deltas, -24 byte addend deltas.
- EXPECT_EQ(static_cast<typename ELF::Addr>(-24), packed[ndx++]);
- EXPECT_EQ(static_cast<typename ELF::Addr>(-24), packed[ndx++]);
- EXPECT_EQ(static_cast<typename ELF::Addr>(-24), packed[ndx++]);
-
- // and last - 2 relocations without addend
- EXPECT_EQ(2U, packed[ndx++]);
- EXPECT_EQ(0U, packed[ndx++]); // flags
- // offset_deltas and r_infos for next 2 relocations
- EXPECT_EQ(0x2008U, packed[ndx++]); // offset delta
- EXPECT_EQ(1042U, packed[ndx++]); // r_info
- EXPECT_EQ(0x8U, packed[ndx++]); // offset delta
- EXPECT_EQ(3442U, packed[ndx++]); // r_info
-
- EXPECT_EQ(packed.size(), ndx);
-}
-
-TEST(Delta, Encode32) {
- encode<ELF32_traits>();
-}
-
-TEST(Delta, Encode64) {
- encode<ELF64_traits>();
-}
-
-template <typename ELF>
-static void decode() {
- std::vector<typename ELF::Addr> packed;
- std::vector<typename ELF::Rela> relocations;
-
- RelocationDeltaCodec<ELF> codec;
- codec.Decode(packed, &relocations);
-
- EXPECT_EQ(0U, relocations.size());
-
- // Six pairs.
- packed.push_back(6U); // count
- packed.push_back(0xc0ddfffc); // base offset
- packed.push_back(3U); // group count
- packed.push_back(11U); // flags
- packed.push_back(4U); // offset delta
- packed.push_back(11U); // info
- // Initial relocation.
- packed.push_back(10000U);
- // Two relocations, 4 byte offset deltas, 12 byte addend deltas.
- packed.push_back(12U); // addend
- packed.push_back(12U); // addend
-
- // Three relocations, 8 byte offset deltas, -24 byte addend deltas.
- packed.push_back(1U); // group count
- packed.push_back(9U); // flags
- packed.push_back(11U); // info
-
- packed.push_back(8U);
- packed.push_back(static_cast<typename ELF::Addr>(-24));
- // next group with 2 relocs
- packed.push_back(2U); // group count
- packed.push_back(11U); // flags
- packed.push_back(8U); // offset
- packed.push_back(42U); // info
-
- packed.push_back(static_cast<typename ELF::Addr>(-24)); // addend
- packed.push_back(static_cast<typename ELF::Addr>(-24)); // addend
-
- relocations.clear();
- codec.Decode(packed, &relocations);
-
- EXPECT_EQ(6U, relocations.size());
- // Initial relocation.
- EXPECT_TRUE(CheckRelocation(0xc0de0000, 11U, 10000, relocations[0]));
- // Two relocations, 4 byte offset deltas, 12 byte addend deltas.
- EXPECT_TRUE(CheckRelocation(0xc0de0004, 11U, 10012, relocations[1]));
- EXPECT_TRUE(CheckRelocation(0xc0de0008, 11U, 10024, relocations[2]));
- // Three relocations, 8 byte offset deltas, -24 byte addend deltas.
- EXPECT_TRUE(CheckRelocation(0xc0de0010, 11U, 10000, relocations[3]));
- EXPECT_TRUE(CheckRelocation(0xc0de0018, 42U, 9976, relocations[4]));
- EXPECT_TRUE(CheckRelocation(0xc0de0020, 42U, 9952, relocations[5]));
-}
-
-TEST(Delta, Decode32) {
- decode<ELF32_traits>();
-}
-
-TEST(Delta, Decode64) {
- decode<ELF64_traits>();
-}
-
-// TODO (dimitry): add more tests (fix by 19 January 2038 03:14:07 UTC)
-// TODO (dimtiry): 1. Incorrect packed array for decode
-// TODO (dimtiry): 2. Try to catch situation where it is likely to get series of groups with size 1
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/elf_file.cc b/tools/relocation_packer/src/elf_file.cc
deleted file mode 100644
index 275e486..0000000
--- a/tools/relocation_packer/src/elf_file.cc
+++ /dev/null
@@ -1,1001 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Implementation notes:
-//
-// We need to remove a piece from the ELF shared library. However, we also
-// want to avoid fixing DWARF cfi data and relative relocation addresses.
-// So after packing we shift offets and starting address of the RX segment
-// while preserving code/data vaddrs location.
-// This requires some fixups for symtab/hash/gnu_hash dynamic section addresses.
-
-#include "elf_file.h"
-
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <algorithm>
-#include <string>
-#include <vector>
-
-#include "debug.h"
-#include "elf_traits.h"
-#include "libelf.h"
-#include "packer.h"
-
-namespace relocation_packer {
-
-// Out-of-band dynamic tags used to indicate the offset and size of the
-// android packed relocations section.
-static constexpr int32_t DT_ANDROID_REL = DT_LOOS + 2;
-static constexpr int32_t DT_ANDROID_RELSZ = DT_LOOS + 3;
-
-static constexpr int32_t DT_ANDROID_RELA = DT_LOOS + 4;
-static constexpr int32_t DT_ANDROID_RELASZ = DT_LOOS + 5;
-
-static constexpr uint32_t SHT_ANDROID_REL = SHT_LOOS + 1;
-static constexpr uint32_t SHT_ANDROID_RELA = SHT_LOOS + 2;
-
-static const size_t kPageSize = 4096;
-
-// Alignment to preserve, in bytes. This must be at least as large as the
-// largest d_align and sh_addralign values found in the loaded file.
-// Out of caution for RELRO page alignment, we preserve to a complete target
-// page. See http://www.airs.com/blog/archives/189.
-static const size_t kPreserveAlignment = kPageSize;
-
-// Get section data. Checks that the section has exactly one data entry,
-// so that the section size and the data size are the same. True in
-// practice for all sections we resize when packing or unpacking. Done
-// by ensuring that a call to elf_getdata(section, data) returns NULL as
-// the next data entry.
-static Elf_Data* GetSectionData(Elf_Scn* section) {
- Elf_Data* data = elf_getdata(section, NULL);
- CHECK(data && elf_getdata(section, data) == NULL);
- return data;
-}
-
-// Rewrite section data. Allocates new data and makes it the data element's
-// buffer. Relies on program exit to free allocated data.
-static void RewriteSectionData(Elf_Scn* section,
- const void* section_data,
- size_t size) {
- Elf_Data* data = GetSectionData(section);
- CHECK(size == data->d_size);
- uint8_t* area = new uint8_t[size];
- memcpy(area, section_data, size);
- data->d_buf = area;
-}
-
-// Verbose ELF header logging.
-template <typename Ehdr>
-static void VerboseLogElfHeader(const Ehdr* elf_header) {
- VLOG(1) << "e_phoff = " << elf_header->e_phoff;
- VLOG(1) << "e_shoff = " << elf_header->e_shoff;
- VLOG(1) << "e_ehsize = " << elf_header->e_ehsize;
- VLOG(1) << "e_phentsize = " << elf_header->e_phentsize;
- VLOG(1) << "e_phnum = " << elf_header->e_phnum;
- VLOG(1) << "e_shnum = " << elf_header->e_shnum;
- VLOG(1) << "e_shstrndx = " << elf_header->e_shstrndx;
-}
-
-// Verbose ELF program header logging.
-template <typename Phdr>
-static void VerboseLogProgramHeader(size_t program_header_index,
- const Phdr* program_header) {
- std::string type;
- switch (program_header->p_type) {
- case PT_NULL: type = "NULL"; break;
- case PT_LOAD: type = "LOAD"; break;
- case PT_DYNAMIC: type = "DYNAMIC"; break;
- case PT_INTERP: type = "INTERP"; break;
- case PT_PHDR: type = "PHDR"; break;
- case PT_GNU_RELRO: type = "GNU_RELRO"; break;
- case PT_GNU_STACK: type = "GNU_STACK"; break;
- case PT_ARM_EXIDX: type = "EXIDX"; break;
- default: type = "(OTHER)"; break;
- }
- VLOG(1) << "phdr[" << program_header_index << "] : " << type;
- VLOG(1) << " p_offset = " << program_header->p_offset;
- VLOG(1) << " p_vaddr = " << program_header->p_vaddr;
- VLOG(1) << " p_paddr = " << program_header->p_paddr;
- VLOG(1) << " p_filesz = " << program_header->p_filesz;
- VLOG(1) << " p_memsz = " << program_header->p_memsz;
- VLOG(1) << " p_flags = " << program_header->p_flags;
- VLOG(1) << " p_align = " << program_header->p_align;
-}
-
-// Verbose ELF section header logging.
-template <typename Shdr>
-static void VerboseLogSectionHeader(const std::string& section_name,
- const Shdr* section_header) {
- VLOG(1) << "section " << section_name;
- VLOG(1) << " sh_addr = " << section_header->sh_addr;
- VLOG(1) << " sh_offset = " << section_header->sh_offset;
- VLOG(1) << " sh_size = " << section_header->sh_size;
- VLOG(1) << " sh_entsize = " << section_header->sh_entsize;
- VLOG(1) << " sh_addralign = " << section_header->sh_addralign;
-}
-
-// Verbose ELF section data logging.
-static void VerboseLogSectionData(const Elf_Data* data) {
- VLOG(1) << " data";
- VLOG(1) << " d_buf = " << data->d_buf;
- VLOG(1) << " d_off = " << data->d_off;
- VLOG(1) << " d_size = " << data->d_size;
- VLOG(1) << " d_align = " << data->d_align;
-}
-
-// Load the complete ELF file into a memory image in libelf, and identify
-// the .rel.dyn or .rela.dyn, .dynamic, and .android.rel.dyn or
-// .android.rela.dyn sections. No-op if the ELF file has already been loaded.
-template <typename ELF>
-bool ElfFile<ELF>::Load() {
- if (elf_)
- return true;
-
- Elf* elf = elf_begin(fd_, ELF_C_RDWR, NULL);
- CHECK(elf);
-
- if (elf_kind(elf) != ELF_K_ELF) {
- LOG(ERROR) << "File not in ELF format";
- return false;
- }
-
- auto elf_header = ELF::getehdr(elf);
- if (!elf_header) {
- LOG(ERROR) << "Failed to load ELF header: " << elf_errmsg(elf_errno());
- return false;
- }
-
- if (elf_header->e_type != ET_DYN) {
- LOG(ERROR) << "ELF file is not a shared object";
- return false;
- }
-
- // Require that our endianness matches that of the target, and that both
- // are little-endian. Safe for all current build/target combinations.
- const int endian = elf_header->e_ident[EI_DATA];
- CHECK(endian == ELFDATA2LSB);
- CHECK(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__);
-
- const int file_class = elf_header->e_ident[EI_CLASS];
- VLOG(1) << "endian = " << endian << ", file class = " << file_class;
- VerboseLogElfHeader(elf_header);
-
- auto elf_program_header = ELF::getphdr(elf);
- CHECK(elf_program_header != nullptr);
-
- const typename ELF::Phdr* dynamic_program_header = NULL;
- for (size_t i = 0; i < elf_header->e_phnum; ++i) {
- auto program_header = &elf_program_header[i];
- VerboseLogProgramHeader(i, program_header);
-
- if (program_header->p_type == PT_DYNAMIC) {
- CHECK(dynamic_program_header == NULL);
- dynamic_program_header = program_header;
- }
- }
- CHECK(dynamic_program_header != nullptr);
-
- size_t string_index;
- elf_getshdrstrndx(elf, &string_index);
-
- // Notes of the dynamic relocations, packed relocations, and .dynamic
- // sections. Found while iterating sections, and later stored in class
- // attributes.
- Elf_Scn* found_relocations_section = nullptr;
- Elf_Scn* found_dynamic_section = nullptr;
-
- // Notes of relocation section types seen. We require one or the other of
- // these; both is unsupported.
- bool has_rel_relocations = false;
- bool has_rela_relocations = false;
- bool has_android_relocations = false;
-
- Elf_Scn* section = NULL;
- while ((section = elf_nextscn(elf, section)) != nullptr) {
- auto section_header = ELF::getshdr(section);
- std::string name = elf_strptr(elf, string_index, section_header->sh_name);
- VerboseLogSectionHeader(name, section_header);
-
- // Note relocation section types.
- if (section_header->sh_type == SHT_REL || section_header->sh_type == SHT_ANDROID_REL) {
- has_rel_relocations = true;
- }
- if (section_header->sh_type == SHT_RELA || section_header->sh_type == SHT_ANDROID_RELA) {
- has_rela_relocations = true;
- }
-
- // Note special sections as we encounter them.
- if ((name == ".rel.dyn" || name == ".rela.dyn") &&
- section_header->sh_size > 0) {
- found_relocations_section = section;
-
- // Note if relocation section is already packed
- has_android_relocations =
- section_header->sh_type == SHT_ANDROID_REL ||
- section_header->sh_type == SHT_ANDROID_RELA;
- }
-
- if (section_header->sh_offset == dynamic_program_header->p_offset) {
- found_dynamic_section = section;
- }
-
- // Ensure we preserve alignment, repeated later for the data block(s).
- CHECK(section_header->sh_addralign <= kPreserveAlignment);
-
- Elf_Data* data = NULL;
- while ((data = elf_getdata(section, data)) != NULL) {
- CHECK(data->d_align <= kPreserveAlignment);
- VerboseLogSectionData(data);
- }
- }
-
- // Loading failed if we did not find the required special sections.
- if (!found_dynamic_section) {
- LOG(ERROR) << "Missing .dynamic section";
- return false;
- }
-
- if (found_relocations_section != nullptr) {
- // Loading failed if we could not identify the relocations type.
- if (!has_rel_relocations && !has_rela_relocations) {
- LOG(ERROR) << "No relocations sections found";
- return false;
- }
- if (has_rel_relocations && has_rela_relocations) {
- LOG(ERROR) << "Multiple relocations sections with different types found, "
- << "not currently supported";
- return false;
- }
- }
-
- elf_ = elf;
- relocations_section_ = found_relocations_section;
- dynamic_section_ = found_dynamic_section;
- relocations_type_ = has_rel_relocations ? REL : RELA;
- has_android_relocations_ = has_android_relocations;
- return true;
-}
-
-// Helper for ResizeSection(). Adjust the main ELF header for the hole.
-template <typename ELF>
-static void AdjustElfHeaderForHole(typename ELF::Ehdr* elf_header,
- typename ELF::Off hole_start,
- ssize_t hole_size) {
- if (elf_header->e_phoff > hole_start) {
- elf_header->e_phoff += hole_size;
- VLOG(1) << "e_phoff adjusted to " << elf_header->e_phoff;
- }
- if (elf_header->e_shoff > hole_start) {
- elf_header->e_shoff += hole_size;
- VLOG(1) << "e_shoff adjusted to " << elf_header->e_shoff;
- }
-}
-
-// Helper for ResizeSection(). Adjust all section headers for the hole.
-template <typename ELF>
-static void AdjustSectionHeadersForHole(Elf* elf,
- typename ELF::Off hole_start,
- ssize_t hole_size) {
- size_t string_index;
- elf_getshdrstrndx(elf, &string_index);
-
- Elf_Scn* section = NULL;
- while ((section = elf_nextscn(elf, section)) != NULL) {
- auto section_header = ELF::getshdr(section);
- std::string name = elf_strptr(elf, string_index, section_header->sh_name);
-
- if (section_header->sh_offset > hole_start) {
- section_header->sh_offset += hole_size;
- VLOG(1) << "section " << name
- << " sh_offset adjusted to " << section_header->sh_offset;
- } else {
- section_header->sh_addr -= hole_size;
- VLOG(1) << "section " << name
- << " sh_addr adjusted to " << section_header->sh_addr;
- }
- }
-}
-
-// Helpers for ResizeSection(). On packing, reduce p_align for LOAD segments
-// to 4kb if larger. On unpacking, restore p_align for LOAD segments if
-// packing reduced it to 4kb. Return true if p_align was changed.
-template <typename ELF>
-static bool ClampLoadSegmentAlignment(typename ELF::Phdr* program_header) {
- CHECK(program_header->p_type == PT_LOAD);
-
- // If large, reduce p_align for a LOAD segment to page size on packing.
- if (program_header->p_align > kPageSize) {
- program_header->p_align = kPageSize;
- return true;
- }
- return false;
-}
-
-template <typename ELF>
-static bool RestoreLoadSegmentAlignment(typename ELF::Phdr* program_headers,
- size_t count,
- typename ELF::Phdr* program_header) {
- CHECK(program_header->p_type == PT_LOAD);
-
- // If p_align was reduced on packing, restore it to its previous value
- // on unpacking. We do this by searching for a different LOAD segment
- // and setting p_align to that of the other LOAD segment found.
- //
- // Relies on the following observations:
- // - a packable ELF executable has more than one LOAD segment;
- // - before packing all LOAD segments have the same p_align;
- // - on packing we reduce only one LOAD segment's p_align.
- if (program_header->p_align == kPageSize) {
- for (size_t i = 0; i < count; ++i) {
- typename ELF::Phdr* other_header = &program_headers[i];
- if (other_header->p_type == PT_LOAD && other_header != program_header) {
- program_header->p_align = other_header->p_align;
- return true;
- }
- }
- LOG(WARNING) << "Cannot find a LOAD segment from which to restore p_align";
- }
- return false;
-}
-
-template <typename ELF>
-static bool AdjustLoadSegmentAlignment(typename ELF::Phdr* program_headers,
- size_t count,
- typename ELF::Phdr* program_header,
- ssize_t hole_size) {
- CHECK(program_header->p_type == PT_LOAD);
-
- bool status = false;
- if (hole_size < 0) {
- status = ClampLoadSegmentAlignment<ELF>(program_header);
- } else if (hole_size > 0) {
- status = RestoreLoadSegmentAlignment<ELF>(program_headers,
- count,
- program_header);
- }
- return status;
-}
-
-// Helper for ResizeSection(). Adjust the offsets of any program headers
-// that have offsets currently beyond the hole start, and adjust the
-// virtual and physical addrs (and perhaps alignment) of the others.
-template <typename ELF>
-static void AdjustProgramHeaderFields(typename ELF::Phdr* program_headers,
- size_t count,
- typename ELF::Off hole_start,
- ssize_t hole_size) {
- int alignment_changes = 0;
- for (size_t i = 0; i < count; ++i) {
- typename ELF::Phdr* program_header = &program_headers[i];
-
- // Do not adjust PT_GNU_STACK - it confuses gdb and results
- // in incorrect unwinding if the executable is stripped after
- // packing.
- if (program_header->p_type == PT_GNU_STACK) {
- continue;
- }
-
- if (program_header->p_offset > hole_start) {
- // The hole start is past this segment, so adjust offset.
- program_header->p_offset += hole_size;
- VLOG(1) << "phdr[" << i
- << "] p_offset adjusted to "<< program_header->p_offset;
- } else {
- program_header->p_vaddr -= hole_size;
- program_header->p_paddr -= hole_size;
-
- // If packing, clamp LOAD segment alignment to 4kb to prevent strip
- // from adjusting it unnecessarily if run on a packed file. If
- // unpacking, attempt to restore a reduced alignment to its previous
- // value. Ensure that we do this on at most one LOAD segment.
- if (program_header->p_type == PT_LOAD) {
- alignment_changes += AdjustLoadSegmentAlignment<ELF>(program_headers,
- count,
- program_header,
- hole_size);
- LOG_IF(FATAL, alignment_changes > 1)
- << "Changed p_align on more than one LOAD segment";
- }
-
- VLOG(1) << "phdr[" << i
- << "] p_vaddr adjusted to "<< program_header->p_vaddr
- << "; p_paddr adjusted to "<< program_header->p_paddr
- << "; p_align adjusted to "<< program_header->p_align;
- }
- }
-}
-
-// Helper for ResizeSection(). Find the first loadable segment in the
-// file. We expect it to map from file offset zero.
-template <typename ELF>
-static typename ELF::Phdr* FindLoadSegmentForHole(typename ELF::Phdr* program_headers,
- size_t count,
- typename ELF::Off hole_start) {
- for (size_t i = 0; i < count; ++i) {
- typename ELF::Phdr* program_header = &program_headers[i];
-
- if (program_header->p_type == PT_LOAD &&
- program_header->p_offset <= hole_start &&
- (program_header->p_offset + program_header->p_filesz) >= hole_start ) {
- return program_header;
- }
- }
- LOG(FATAL) << "Cannot locate a LOAD segment with hole_start=0x" << std::hex << hole_start;
- NOTREACHED();
-
- return nullptr;
-}
-
-// Helper for ResizeSection(). Rewrite program headers.
-template <typename ELF>
-static void RewriteProgramHeadersForHole(Elf* elf,
- typename ELF::Off hole_start,
- ssize_t hole_size) {
- const typename ELF::Ehdr* elf_header = ELF::getehdr(elf);
- CHECK(elf_header);
-
- typename ELF::Phdr* elf_program_header = ELF::getphdr(elf);
- CHECK(elf_program_header);
-
- const size_t program_header_count = elf_header->e_phnum;
-
- // Locate the segment that we can overwrite to form the new LOAD entry,
- // and the segment that we are going to split into two parts.
- typename ELF::Phdr* target_load_header =
- FindLoadSegmentForHole<ELF>(elf_program_header, program_header_count, hole_start);
-
- VLOG(1) << "phdr[" << target_load_header - elf_program_header << "] adjust";
- // Adjust PT_LOAD program header memsz and filesz
- target_load_header->p_filesz += hole_size;
- target_load_header->p_memsz += hole_size;
-
- // Adjust the offsets and p_vaddrs
- AdjustProgramHeaderFields<ELF>(elf_program_header,
- program_header_count,
- hole_start,
- hole_size);
-}
-
-// Helper for ResizeSection(). Locate and return the dynamic section.
-template <typename ELF>
-static Elf_Scn* GetDynamicSection(Elf* elf) {
- const typename ELF::Ehdr* elf_header = ELF::getehdr(elf);
- CHECK(elf_header);
-
- const typename ELF::Phdr* elf_program_header = ELF::getphdr(elf);
- CHECK(elf_program_header);
-
- // Find the program header that describes the dynamic section.
- const typename ELF::Phdr* dynamic_program_header = NULL;
- for (size_t i = 0; i < elf_header->e_phnum; ++i) {
- const typename ELF::Phdr* program_header = &elf_program_header[i];
-
- if (program_header->p_type == PT_DYNAMIC) {
- dynamic_program_header = program_header;
- }
- }
- CHECK(dynamic_program_header);
-
- // Now find the section with the same offset as this program header.
- Elf_Scn* dynamic_section = NULL;
- Elf_Scn* section = NULL;
- while ((section = elf_nextscn(elf, section)) != NULL) {
- typename ELF::Shdr* section_header = ELF::getshdr(section);
-
- if (section_header->sh_offset == dynamic_program_header->p_offset) {
- dynamic_section = section;
- }
- }
- CHECK(dynamic_section != NULL);
-
- return dynamic_section;
-}
-
-// Helper for ResizeSection(). Adjust the .dynamic section for the hole.
-template <typename ELF>
-void ElfFile<ELF>::AdjustDynamicSectionForHole(Elf_Scn* dynamic_section,
- typename ELF::Off hole_start,
- ssize_t hole_size,
- relocations_type_t relocations_type) {
- CHECK(relocations_type != NONE);
- Elf_Data* data = GetSectionData(dynamic_section);
-
- auto dynamic_base = reinterpret_cast<typename ELF::Dyn*>(data->d_buf);
- std::vector<typename ELF::Dyn> dynamics(
- dynamic_base,
- dynamic_base + data->d_size / sizeof(dynamics[0]));
-
- if (hole_size > 0) { // expanding
- hole_start += hole_size;
- }
-
- for (size_t i = 0; i < dynamics.size(); ++i) {
- typename ELF::Dyn* dynamic = &dynamics[i];
- const typename ELF::Sword tag = dynamic->d_tag;
-
- // Any tags that hold offsets are adjustment candidates.
- const bool is_adjustable = (tag == DT_PLTGOT ||
- tag == DT_HASH ||
- tag == DT_GNU_HASH ||
- tag == DT_STRTAB ||
- tag == DT_SYMTAB ||
- tag == DT_RELA ||
- tag == DT_INIT ||
- tag == DT_FINI ||
- tag == DT_REL ||
- tag == DT_JMPREL ||
- tag == DT_INIT_ARRAY ||
- tag == DT_FINI_ARRAY ||
- tag == DT_VERSYM ||
- tag == DT_VERNEED ||
- tag == DT_VERDEF ||
- tag == DT_ANDROID_REL||
- tag == DT_ANDROID_RELA);
-
- if (is_adjustable && dynamic->d_un.d_ptr <= hole_start) {
- dynamic->d_un.d_ptr -= hole_size;
- VLOG(1) << "dynamic[" << i << "] " << dynamic->d_tag
- << " d_ptr adjusted to " << dynamic->d_un.d_ptr;
- }
-
- // DT_RELSZ or DT_RELASZ indicate the overall size of relocations.
- // Only one will be present. Adjust by hole size.
- if (tag == DT_RELSZ || tag == DT_RELASZ || tag == DT_ANDROID_RELSZ || tag == DT_ANDROID_RELASZ) {
- dynamic->d_un.d_val += hole_size;
- VLOG(1) << "dynamic[" << i << "] " << dynamic->d_tag
- << " d_val adjusted to " << dynamic->d_un.d_val;
- }
-
- // Special case: DT_MIPS_RLD_MAP_REL stores the difference between dynamic
- // entry address and the address of the _r_debug (used by GDB)
- // since the dynamic section and target address are on the
- // different sides of the hole it needs to be adjusted accordingly
- if (tag == DT_MIPS_RLD_MAP_REL) {
- dynamic->d_un.d_val += hole_size;
- VLOG(1) << "dynamic[" << i << "] " << dynamic->d_tag
- << " d_val adjusted to " << dynamic->d_un.d_val;
- }
-
- // Ignore DT_RELCOUNT and DT_RELACOUNT: (1) nobody uses them and
- // technically (2) the relative relocation count is not changed.
-
- // DT_RELENT and DT_RELAENT don't change, ignore them as well.
- }
-
- void* section_data = &dynamics[0];
- size_t bytes = dynamics.size() * sizeof(dynamics[0]);
- RewriteSectionData(dynamic_section, section_data, bytes);
-}
-
-// Resize a section. If the new size is larger than the current size, open
-// up a hole by increasing file offsets that come after the hole. If smaller
-// than the current size, remove the hole by decreasing those offsets.
-template <typename ELF>
-void ElfFile<ELF>::ResizeSection(Elf* elf, Elf_Scn* section, size_t new_size,
- typename ELF::Word new_sh_type,
- relocations_type_t relocations_type) {
-
- size_t string_index;
- elf_getshdrstrndx(elf, &string_index);
- auto section_header = ELF::getshdr(section);
- std::string name = elf_strptr(elf, string_index, section_header->sh_name);
-
- if (section_header->sh_size == new_size) {
- return;
- }
-
- // Require that the section size and the data size are the same. True
- // in practice for all sections we resize when packing or unpacking.
- Elf_Data* data = GetSectionData(section);
- CHECK(data->d_off == 0 && data->d_size == section_header->sh_size);
-
- // Require that the section is not zero-length (that is, has allocated
- // data that we can validly expand).
- CHECK(data->d_size && data->d_buf);
-
- const auto hole_start = section_header->sh_offset;
- const ssize_t hole_size = new_size - data->d_size;
-
- VLOG_IF(1, (hole_size > 0)) << "expand section (" << name << ") size: " <<
- data->d_size << " -> " << (data->d_size + hole_size);
- VLOG_IF(1, (hole_size < 0)) << "shrink section (" << name << ") size: " <<
- data->d_size << " -> " << (data->d_size + hole_size);
-
- // libelf overrides sh_entsize for known sh_types, so it does not matter what we set
- // for SHT_REL/SHT_RELA.
- typename ELF::Xword new_entsize =
- (new_sh_type == SHT_ANDROID_REL || new_sh_type == SHT_ANDROID_RELA) ? 1 : 0;
-
- VLOG(1) << "Update section (" << name << ") entry size: " <<
- section_header->sh_entsize << " -> " << new_entsize;
-
- // Resize the data and the section header.
- data->d_size += hole_size;
- section_header->sh_size += hole_size;
- section_header->sh_entsize = new_entsize;
- section_header->sh_type = new_sh_type;
-
- // Add the hole size to all offsets in the ELF file that are after the
- // start of the hole. If the hole size is positive we are expanding the
- // section to create a new hole; if negative, we are closing up a hole.
-
- // Start with the main ELF header.
- typename ELF::Ehdr* elf_header = ELF::getehdr(elf);
- AdjustElfHeaderForHole<ELF>(elf_header, hole_start, hole_size);
-
- // Adjust all section headers.
- AdjustSectionHeadersForHole<ELF>(elf, hole_start, hole_size);
-
- // Rewrite the program headers to either split or coalesce segments,
- // and adjust dynamic entries to match.
- RewriteProgramHeadersForHole<ELF>(elf, hole_start, hole_size);
-
- Elf_Scn* dynamic_section = GetDynamicSection<ELF>(elf);
- AdjustDynamicSectionForHole(dynamic_section, hole_start, hole_size, relocations_type);
-}
-
-// Find the first slot in a dynamics array with the given tag. The array
-// always ends with a free (unused) element, and which we exclude from the
-// search. Returns dynamics->size() if not found.
-template <typename ELF>
-static size_t FindDynamicEntry(typename ELF::Sword tag,
- std::vector<typename ELF::Dyn>* dynamics) {
- // Loop until the penultimate entry. We exclude the end sentinel.
- for (size_t i = 0; i < dynamics->size() - 1; ++i) {
- if (dynamics->at(i).d_tag == tag) {
- return i;
- }
- }
-
- // The tag was not found.
- return dynamics->size();
-}
-
-// Replace dynamic entry.
-template <typename ELF>
-static void ReplaceDynamicEntry(typename ELF::Sword tag,
- const typename ELF::Dyn& dyn,
- std::vector<typename ELF::Dyn>* dynamics) {
- const size_t slot = FindDynamicEntry<ELF>(tag, dynamics);
- if (slot == dynamics->size()) {
- LOG(FATAL) << "Dynamic slot is not found for tag=" << tag;
- }
-
- // Replace this entry with the one supplied.
- dynamics->at(slot) = dyn;
- VLOG(1) << "dynamic[" << slot << "] overwritten with " << dyn.d_tag;
-}
-
-// Remove relative entries from dynamic relocations and write as packed
-// data into android packed relocations.
-template <typename ELF>
-bool ElfFile<ELF>::PackRelocations() {
- // Load the ELF file into libelf.
- if (!Load()) {
- LOG(ERROR) << "Failed to load as ELF";
- return false;
- }
-
- if (relocations_section_ == nullptr) {
- // There is nothing to do
- return true;
- }
-
- // Retrieve the current dynamic relocations section data.
- Elf_Data* data = GetSectionData(relocations_section_);
- // we always pack rela, because packed format is pretty much the same
- std::vector<typename ELF::Rela> relocations;
-
- if (relocations_type_ == REL) {
- // Convert data to a vector of relocations.
- const typename ELF::Rel* relocations_base = reinterpret_cast<typename ELF::Rel*>(data->d_buf);
- ConvertRelArrayToRelaVector(relocations_base,
- data->d_size / sizeof(typename ELF::Rel), &relocations);
- VLOG(1) << "Relocations : REL";
- } else if (relocations_type_ == RELA) {
- // Convert data to a vector of relocations with addends.
- const typename ELF::Rela* relocations_base = reinterpret_cast<typename ELF::Rela*>(data->d_buf);
- relocations = std::vector<typename ELF::Rela>(
- relocations_base,
- relocations_base + data->d_size / sizeof(relocations[0]));
-
- VLOG(1) << "Relocations : RELA";
- } else {
- NOTREACHED();
- }
-
- return PackTypedRelocations(&relocations);
-}
-
-// Helper for PackRelocations(). Rel type is one of ELF::Rel or ELF::Rela.
-template <typename ELF>
-bool ElfFile<ELF>::PackTypedRelocations(std::vector<typename ELF::Rela>* relocations) {
- typedef typename ELF::Rela Rela;
-
- if (has_android_relocations_) {
- LOG(INFO) << "Relocation table is already packed";
- return true;
- }
-
- // If no relocations then we have nothing packable. Perhaps
- // the shared object has already been packed?
- if (relocations->empty()) {
- LOG(ERROR) << "No relocations found";
- return false;
- }
-
- const size_t rel_size =
- relocations_type_ == RELA ? sizeof(typename ELF::Rela) : sizeof(typename ELF::Rel);
- const size_t initial_bytes = relocations->size() * rel_size;
-
- VLOG(1) << "Unpacked : " << initial_bytes << " bytes";
- std::vector<uint8_t> packed;
- RelocationPacker<ELF> packer;
-
- // Pack relocations: dry run to estimate memory savings.
- packer.PackRelocations(*relocations, &packed);
- const size_t packed_bytes_estimate = packed.size() * sizeof(packed[0]);
- VLOG(1) << "Packed (no padding): " << packed_bytes_estimate << " bytes";
-
- if (packed.empty()) {
- VLOG(1) << "Too few relocations to pack";
- return true;
- }
-
- // Pre-calculate the size of the hole we will close up when we rewrite
- // dynamic relocations. We have to adjust relocation addresses to
- // account for this.
- typename ELF::Shdr* section_header = ELF::getshdr(relocations_section_);
- ssize_t hole_size = initial_bytes - packed_bytes_estimate;
-
- // hole_size needs to be page_aligned.
- hole_size -= hole_size % kPreserveAlignment;
-
- VLOG(1) << "Compaction : " << hole_size << " bytes";
-
- // Adjusting for alignment may have removed any packing benefit.
- if (hole_size == 0) {
- VLOG(1) << "Too few relocations to pack after alignment";
- return true;
- }
-
- if (hole_size <= 0) {
- VLOG(1) << "Packing relocations saves no space";
- return true;
- }
-
- size_t data_padding_bytes = is_padding_relocations_ ?
- initial_bytes - packed_bytes_estimate :
- initial_bytes - hole_size - packed_bytes_estimate;
-
- // pad data
- std::vector<uint8_t> padding(data_padding_bytes, 0);
- packed.insert(packed.end(), padding.begin(), padding.end());
-
- const void* packed_data = &packed[0];
-
- // Run a loopback self-test as a check that packing is lossless.
- std::vector<Rela> unpacked;
- packer.UnpackRelocations(packed, &unpacked);
- CHECK(unpacked.size() == relocations->size());
- CHECK(!memcmp(&unpacked[0],
- &relocations->at(0),
- unpacked.size() * sizeof(unpacked[0])));
-
- // Rewrite the current dynamic relocations section with packed one then shrink it to size.
- const size_t bytes = packed.size() * sizeof(packed[0]);
- ResizeSection(elf_, relocations_section_, bytes,
- relocations_type_ == REL ? SHT_ANDROID_REL : SHT_ANDROID_RELA, relocations_type_);
- RewriteSectionData(relocations_section_, packed_data, bytes);
-
- // TODO (dimitry): fix string table and replace .rel.dyn/plt with .android.rel.dyn/plt
-
- // Rewrite .dynamic and rename relocation tags describing the packed android
- // relocations.
- Elf_Data* data = GetSectionData(dynamic_section_);
- const typename ELF::Dyn* dynamic_base = reinterpret_cast<typename ELF::Dyn*>(data->d_buf);
- std::vector<typename ELF::Dyn> dynamics(
- dynamic_base,
- dynamic_base + data->d_size / sizeof(dynamics[0]));
- section_header = ELF::getshdr(relocations_section_);
- {
- typename ELF::Dyn dyn;
- dyn.d_tag = relocations_type_ == REL ? DT_ANDROID_REL : DT_ANDROID_RELA;
- dyn.d_un.d_ptr = section_header->sh_addr;
- ReplaceDynamicEntry<ELF>(relocations_type_ == REL ? DT_REL : DT_RELA, dyn, &dynamics);
- }
- {
- typename ELF::Dyn dyn;
- dyn.d_tag = relocations_type_ == REL ? DT_ANDROID_RELSZ : DT_ANDROID_RELASZ;
- dyn.d_un.d_val = section_header->sh_size;
- ReplaceDynamicEntry<ELF>(relocations_type_ == REL ? DT_RELSZ : DT_RELASZ, dyn, &dynamics);
- }
-
- const void* dynamics_data = &dynamics[0];
- const size_t dynamics_bytes = dynamics.size() * sizeof(dynamics[0]);
- RewriteSectionData(dynamic_section_, dynamics_data, dynamics_bytes);
-
- Flush();
- return true;
-}
-
-// Find packed relative relocations in the packed android relocations
-// section, unpack them, and rewrite the dynamic relocations section to
-// contain unpacked data.
-template <typename ELF>
-bool ElfFile<ELF>::UnpackRelocations() {
- // Load the ELF file into libelf.
- if (!Load()) {
- LOG(ERROR) << "Failed to load as ELF";
- return false;
- }
-
- if (relocations_section_ == nullptr) {
- // There is nothing to do
- return true;
- }
-
- typename ELF::Shdr* section_header = ELF::getshdr(relocations_section_);
- // Retrieve the current packed android relocations section data.
- Elf_Data* data = GetSectionData(relocations_section_);
-
- // Convert data to a vector of bytes.
- const uint8_t* packed_base = reinterpret_cast<uint8_t*>(data->d_buf);
- std::vector<uint8_t> packed(
- packed_base,
- packed_base + data->d_size / sizeof(packed[0]));
-
- if ((section_header->sh_type == SHT_ANDROID_RELA || section_header->sh_type == SHT_ANDROID_REL) &&
- packed.size() > 3 &&
- packed[0] == 'A' &&
- packed[1] == 'P' &&
- packed[2] == 'S' &&
- packed[3] == '2') {
- LOG(INFO) << "Relocations : " << (relocations_type_ == REL ? "REL" : "RELA");
- } else {
- LOG(ERROR) << "Packed relocations not found (not packed?)";
- return false;
- }
-
- return UnpackTypedRelocations(packed);
-}
-
-// Helper for UnpackRelocations(). Rel type is one of ELF::Rel or ELF::Rela.
-template <typename ELF>
-bool ElfFile<ELF>::UnpackTypedRelocations(const std::vector<uint8_t>& packed) {
- // Unpack the data to re-materialize the relative relocations.
- const size_t packed_bytes = packed.size() * sizeof(packed[0]);
- LOG(INFO) << "Packed : " << packed_bytes << " bytes";
- std::vector<typename ELF::Rela> unpacked_relocations;
- RelocationPacker<ELF> packer;
- packer.UnpackRelocations(packed, &unpacked_relocations);
-
- const size_t relocation_entry_size =
- relocations_type_ == REL ? sizeof(typename ELF::Rel) : sizeof(typename ELF::Rela);
- const size_t unpacked_bytes = unpacked_relocations.size() * relocation_entry_size;
- LOG(INFO) << "Unpacked : " << unpacked_bytes << " bytes";
-
- // Retrieve the current dynamic relocations section data.
- Elf_Data* data = GetSectionData(relocations_section_);
-
- LOG(INFO) << "Relocations : " << unpacked_relocations.size() << " entries";
-
- // If we found the same number of null relocation entries in the dynamic
- // relocations section as we hold as unpacked relative relocations, then
- // this is a padded file.
-
- const bool is_padded = packed_bytes == unpacked_bytes;
-
- // Unless padded, pre-apply relative relocations to account for the
- // hole, and pre-adjust all relocation offsets accordingly.
- typename ELF::Shdr* section_header = ELF::getshdr(relocations_section_);
-
- if (!is_padded) {
- LOG(INFO) << "Expansion : " << unpacked_bytes - packed_bytes << " bytes";
- }
-
- // Rewrite the current dynamic relocations section with unpacked version of
- // relocations.
- const void* section_data = nullptr;
- std::vector<typename ELF::Rel> unpacked_rel_relocations;
- if (relocations_type_ == RELA) {
- section_data = &unpacked_relocations[0];
- } else if (relocations_type_ == REL) {
- ConvertRelaVectorToRelVector(unpacked_relocations, &unpacked_rel_relocations);
- section_data = &unpacked_rel_relocations[0];
- } else {
- NOTREACHED();
- }
-
- ResizeSection(elf_, relocations_section_, unpacked_bytes,
- relocations_type_ == REL ? SHT_REL : SHT_RELA, relocations_type_);
- RewriteSectionData(relocations_section_, section_data, unpacked_bytes);
-
- // Rewrite .dynamic to remove two tags describing packed android relocations.
- data = GetSectionData(dynamic_section_);
- const typename ELF::Dyn* dynamic_base = reinterpret_cast<typename ELF::Dyn*>(data->d_buf);
- std::vector<typename ELF::Dyn> dynamics(
- dynamic_base,
- dynamic_base + data->d_size / sizeof(dynamics[0]));
- {
- typename ELF::Dyn dyn;
- dyn.d_tag = relocations_type_ == REL ? DT_REL : DT_RELA;
- dyn.d_un.d_ptr = section_header->sh_addr;
- ReplaceDynamicEntry<ELF>(relocations_type_ == REL ? DT_ANDROID_REL : DT_ANDROID_RELA,
- dyn, &dynamics);
- }
-
- {
- typename ELF::Dyn dyn;
- dyn.d_tag = relocations_type_ == REL ? DT_RELSZ : DT_RELASZ;
- dyn.d_un.d_val = section_header->sh_size;
- ReplaceDynamicEntry<ELF>(relocations_type_ == REL ? DT_ANDROID_RELSZ : DT_ANDROID_RELASZ,
- dyn, &dynamics);
- }
-
- const void* dynamics_data = &dynamics[0];
- const size_t dynamics_bytes = dynamics.size() * sizeof(dynamics[0]);
- RewriteSectionData(dynamic_section_, dynamics_data, dynamics_bytes);
-
- Flush();
- return true;
-}
-
-// Flush rewritten shared object file data.
-template <typename ELF>
-void ElfFile<ELF>::Flush() {
- // Flag all ELF data held in memory as needing to be written back to the
- // file, and tell libelf that we have controlled the file layout.
- elf_flagelf(elf_, ELF_C_SET, ELF_F_DIRTY);
- elf_flagelf(elf_, ELF_C_SET, ELF_F_LAYOUT);
-
- // Write ELF data back to disk.
- const off_t file_bytes = elf_update(elf_, ELF_C_WRITE);
- if (file_bytes == -1) {
- LOG(ERROR) << "elf_update failed: " << elf_errmsg(elf_errno());
- }
-
- CHECK(file_bytes > 0);
- VLOG(1) << "elf_update returned: " << file_bytes;
-
- // Clean up libelf, and truncate the output file to the number of bytes
- // written by elf_update().
- elf_end(elf_);
- elf_ = NULL;
- const int truncate = ftruncate(fd_, file_bytes);
- CHECK(truncate == 0);
-}
-
-template <typename ELF>
-void ElfFile<ELF>::ConvertRelArrayToRelaVector(const typename ELF::Rel* rel_array,
- size_t rel_array_size,
- std::vector<typename ELF::Rela>* rela_vector) {
- for (size_t i = 0; i<rel_array_size; ++i) {
- typename ELF::Rela rela;
- rela.r_offset = rel_array[i].r_offset;
- rela.r_info = rel_array[i].r_info;
- rela.r_addend = 0;
- rela_vector->push_back(rela);
- }
-}
-
-template <typename ELF>
-void ElfFile<ELF>::ConvertRelaVectorToRelVector(const std::vector<typename ELF::Rela>& rela_vector,
- std::vector<typename ELF::Rel>* rel_vector) {
- for (auto rela : rela_vector) {
- typename ELF::Rel rel;
- rel.r_offset = rela.r_offset;
- rel.r_info = rela.r_info;
- CHECK(rela.r_addend == 0);
- rel_vector->push_back(rel);
- }
-}
-
-template class ElfFile<ELF32_traits>;
-template class ElfFile<ELF64_traits>;
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/elf_file.h b/tools/relocation_packer/src/elf_file.h
deleted file mode 100644
index d6acc76..0000000
--- a/tools/relocation_packer/src/elf_file.h
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// ELF shared object file updates handler.
-//
-// Provides functions to pack relocations in the .rel.dyn or .rela.dyn
-// sections, and unpack to return the file to its pre-packed state.
-//
-// SetPadding() causes PackRelocations() to pad .rel.dyn or .rela.dyn with
-// NONE-type entries rather than cutting a hole out of the shared object
-// file. This keeps all load addresses and offsets constant, and enables
-// easier debugging and testing.
-//
-// A packed shared object file is shorter than its non-packed original.
-// Unpacking a packed file restores the file to its non-packed state.
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_ELF_FILE_H_
-#define TOOLS_RELOCATION_PACKER_SRC_ELF_FILE_H_
-
-#include <string.h>
-#include <vector>
-
-#include "elf.h"
-#include "libelf.h"
-#include "packer.h"
-
-namespace relocation_packer {
-
-// An ElfFile reads shared objects, and shuttles relative relocations
-// between .rel.dyn or .rela.dyn and .android.rel.dyn or .android.rela.dyn
-// sections.
-template <typename ELF>
-class ElfFile {
- public:
- explicit ElfFile(int fd)
- : fd_(fd), is_padding_relocations_(false), elf_(NULL),
- relocations_section_(NULL), dynamic_section_(NULL),
- relocations_type_(NONE), has_android_relocations_(false) {}
- ~ElfFile() {}
-
- // Set padding mode. When padding, PackRelocations() will not shrink
- // the .rel.dyn or .rela.dyn section, but instead replace relative with
- // NONE-type entries.
- // |flag| is true to pad .rel.dyn or .rela.dyn, false to shrink it.
- inline void SetPadding(bool flag) { is_padding_relocations_ = flag; }
-
- // Transfer relative relocations from .rel.dyn or .rela.dyn to a packed
- // representation in .android.rel.dyn or .android.rela.dyn. Returns true
- // on success.
- bool PackRelocations();
-
- // Transfer relative relocations from a packed representation in
- // .android.rel.dyn or .android.rela.dyn to .rel.dyn or .rela.dyn. Returns
- // true on success.
- bool UnpackRelocations();
-
- private:
- enum relocations_type_t {
- NONE = 0, REL, RELA
- };
-
- // Load a new ElfFile from a filedescriptor. If flushing, the file must
- // be open for read/write. Returns true on successful ELF file load.
- // |fd| is an open file descriptor for the shared object.
- bool Load();
-
- // Templated packer, helper for PackRelocations(). Rel type is one of
- // ELF::Rel or ELF::Rela.
- bool PackTypedRelocations(std::vector<typename ELF::Rela>* relocations);
-
- // Templated unpacker, helper for UnpackRelocations(). Rel type is one of
- // ELF::Rel or ELF::Rela.
- bool UnpackTypedRelocations(const std::vector<uint8_t>& packed);
-
- // Write ELF file changes.
- void Flush();
-
- void AdjustRelativeRelocationTargets(typename ELF::Off hole_start,
- ssize_t hole_size,
- std::vector<typename ELF::Rela>* relocations);
-
- static void ResizeSection(Elf* elf, Elf_Scn* section, size_t new_size,
- typename ELF::Word new_sh_type, relocations_type_t relocations_type);
-
- static void AdjustDynamicSectionForHole(Elf_Scn* dynamic_section,
- typename ELF::Off hole_start,
- ssize_t hole_size,
- relocations_type_t relocations_type);
-
- static void ConvertRelArrayToRelaVector(const typename ELF::Rel* rel_array, size_t rel_array_size,
- std::vector<typename ELF::Rela>* rela_vector);
-
- static void ConvertRelaVectorToRelVector(const std::vector<typename ELF::Rela>& rela_vector,
- std::vector<typename ELF::Rel>* rel_vector);
-
-
- // File descriptor opened on the shared object.
- int fd_;
-
- // If set, pad rather than shrink .rel.dyn or .rela.dyn. Primarily for
- // debugging, allows packing to be checked without affecting load addresses.
- bool is_padding_relocations_;
-
- // Libelf handle, assigned by Load().
- Elf* elf_;
-
- // Sections that we manipulate, assigned by Load().
- Elf_Scn* relocations_section_;
- Elf_Scn* dynamic_section_;
-
- // Relocation type found, assigned by Load().
- relocations_type_t relocations_type_;
-
- // Elf-file has android relocations section
- bool has_android_relocations_;
-};
-
-} // namespace relocation_packer
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_ELF_FILE_H_
diff --git a/tools/relocation_packer/src/elf_file_unittest.cc b/tools/relocation_packer/src/elf_file_unittest.cc
deleted file mode 100644
index d5c8918..0000000
--- a/tools/relocation_packer/src/elf_file_unittest.cc
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "elf_file.h"
-
-#include <limits.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string>
-#include <vector>
-#include "debug.h"
-#include "elf_traits.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-void GetDataFilePath(const char* name, std::string* path) {
- std::string data_dir;
-
- const char* bindir = getenv("bindir");
- if (bindir) {
- data_dir = std::string(bindir);
- } else {
- char path[PATH_MAX];
- memset(path, 0, sizeof(path));
- ASSERT_NE(-1, readlink("/proc/self/exe", path, sizeof(path) - 1));
-
- data_dir = std::string(path);
- size_t pos = data_dir.rfind('/');
- ASSERT_NE(std::string::npos, pos);
-
- data_dir.erase(pos);
- }
-
- *path = data_dir + "/" + name;
-}
-
-void OpenRelocsTestFile(const char* name, FILE** stream) {
- std::string path;
- GetDataFilePath(name, &path);
-
- FILE* testfile = fopen(path.c_str(), "rb");
- ASSERT_FALSE(testfile == NULL) << "Error opening '" << path << "'";
-
- FILE* temporary = tmpfile();
- ASSERT_FALSE(temporary == NULL);
-
- static const size_t buffer_size = 4096;
- unsigned char buffer[buffer_size];
-
- size_t bytes;
- do {
- bytes = fread(buffer, 1, sizeof(buffer), testfile);
- ASSERT_EQ(bytes, fwrite(buffer, 1, bytes, temporary));
- } while (bytes > 0);
-
- ASSERT_EQ(0, fclose(testfile));
- ASSERT_EQ(0, fseek(temporary, 0, SEEK_SET));
- ASSERT_EQ(0, lseek(fileno(temporary), 0, SEEK_SET));
-
- *stream = temporary;
-}
-
-void OpenRelocsTestFiles(const std::string& arch, FILE** relocs_so, FILE** packed_relocs_so) {
- const std::string base = std::string("elf_file_unittest_relocs_") + arch;
- const std::string relocs = base + ".so";
- const std::string packed_relocs = base + "_packed.so";
-
- OpenRelocsTestFile(relocs.c_str(), relocs_so);
- OpenRelocsTestFile(packed_relocs.c_str(), packed_relocs_so);
-}
-
-void CloseRelocsTestFile(FILE* temporary) {
- fclose(temporary);
-}
-
-void CloseRelocsTestFiles(FILE* relocs_so, FILE* packed_relocs_so) {
- CloseRelocsTestFile(relocs_so);
- CloseRelocsTestFile(packed_relocs_so);
-}
-
-void CheckFileContentsEqual(FILE* first, FILE* second) {
- ASSERT_EQ(0, fseek(first, 0, SEEK_SET));
- ASSERT_EQ(0, fseek(second, 0, SEEK_SET));
-
- static const size_t buffer_size = 4096;
- unsigned char first_buffer[buffer_size];
- unsigned char second_buffer[buffer_size];
-
- do {
- size_t first_read = fread(first_buffer, 1, sizeof(first_buffer), first);
- size_t second_read = fread(second_buffer, 1, sizeof(second_buffer), second);
-
- EXPECT_EQ(first_read, second_read);
- EXPECT_EQ(0, memcmp(first_buffer, second_buffer, first_read));
- } while (!feof(first) && !feof(second));
-
- EXPECT_TRUE(feof(first) && feof(second));
-}
-
-template <typename ELF>
-static void ProcessUnpack(FILE* relocs_so, FILE* packed_relocs_so) {
- relocation_packer::ElfFile<ELF> elf_file(fileno(packed_relocs_so));
-
- // Ensure packing already packed elf-file does not fail the build.
- EXPECT_TRUE(elf_file.PackRelocations());
-
- // Unpack golden relocations, and check files are now identical.
- EXPECT_TRUE(elf_file.UnpackRelocations());
- CheckFileContentsEqual(packed_relocs_so, relocs_so);
-
- CloseRelocsTestFiles(relocs_so, packed_relocs_so);
-}
-
-static void RunUnpackRelocationsTestFor(const std::string& arch) {
- ASSERT_NE(static_cast<uint32_t>(EV_NONE), elf_version(EV_CURRENT));
-
- FILE* relocs_so = NULL;
- FILE* packed_relocs_so = NULL;
- OpenRelocsTestFiles(arch, &relocs_so, &packed_relocs_so);
-
- if (relocs_so != NULL && packed_relocs_so != NULL) {
- // lets detect elf class
- ASSERT_EQ(0, fseek(relocs_so, EI_CLASS, SEEK_SET))
- << "Invalid file length: " << strerror(errno);
- uint8_t elf_class = 0;
- ASSERT_EQ(1U, fread(&elf_class, 1, 1, relocs_so));
- ASSERT_EQ(0, fseek(relocs_so, 0, SEEK_SET));
- if (elf_class == ELFCLASS32) {
- ProcessUnpack<ELF32_traits>(relocs_so, packed_relocs_so);
- } else {
- ProcessUnpack<ELF64_traits>(relocs_so, packed_relocs_so);
- }
- }
-}
-
-template <typename ELF>
-static void ProcessPack(FILE* relocs_so, FILE* packed_relocs_so) {
- relocation_packer::ElfFile<ELF> elf_file(fileno(relocs_so));
-
- // Ensure unpacking fails (not packed).
- EXPECT_FALSE(elf_file.UnpackRelocations());
-
- // Pack relocations, and check files are now identical.
- EXPECT_TRUE(elf_file.PackRelocations());
- CheckFileContentsEqual(relocs_so, packed_relocs_so);
-
- CloseRelocsTestFiles(relocs_so, packed_relocs_so);
-}
-
-static void RunPackRelocationsTestFor(const std::string& arch) {
- ASSERT_NE(static_cast<uint32_t>(EV_NONE), elf_version(EV_CURRENT));
-
- FILE* relocs_so = NULL;
- FILE* packed_relocs_so = NULL;
- OpenRelocsTestFiles(arch, &relocs_so, &packed_relocs_so);
-
- if (relocs_so != NULL && packed_relocs_so != NULL) {
- // lets detect elf class
- ASSERT_EQ(0, fseek(packed_relocs_so, EI_CLASS, SEEK_SET))
- << "Invalid file length: " << strerror(errno);
- uint8_t elf_class = 0;
- ASSERT_EQ(1U, fread(&elf_class, 1, 1, packed_relocs_so));
- fseek(packed_relocs_so, 0, SEEK_SET);
- if (elf_class == ELFCLASS32) {
- ProcessPack<ELF32_traits>(relocs_so, packed_relocs_so);
- } else {
- ProcessPack<ELF64_traits>(relocs_so, packed_relocs_so);
- }
- }
-}
-
-} // namespace
-
-namespace relocation_packer {
-
-TEST(ElfFile, PackRelocationsArm32) {
- RunPackRelocationsTestFor("arm32");
-}
-
-TEST(ElfFile, PackRelocationsArm64) {
- RunPackRelocationsTestFor("arm64");
-}
-
-TEST(ElfFile, PackRelocationsMips32) {
- RunPackRelocationsTestFor("mips32");
-}
-
-TEST(ElfFile, PackRelocationsIa32) {
- RunPackRelocationsTestFor("ia32");
-}
-
-TEST(ElfFile, PackRelocationsX64) {
- RunPackRelocationsTestFor("x64");
-}
-
-TEST(ElfFile, UnpackRelocationsArm32) {
- RunUnpackRelocationsTestFor("arm32");
-}
-
-TEST(ElfFile, UnpackRelocationsArm64) {
- RunUnpackRelocationsTestFor("arm64");
-}
-
-TEST(ElfFile, UnpackRelocationsMips32) {
- RunUnpackRelocationsTestFor("mips32");
-}
-
-TEST(ElfFile, UnpackRelocationsIa32) {
- RunUnpackRelocationsTestFor("ia32");
-}
-
-TEST(ElfFile, UnpackRelocationsX64) {
- RunUnpackRelocationsTestFor("x64");
-}
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/elf_traits.h b/tools/relocation_packer/src/elf_traits.h
deleted file mode 100644
index 3e282b2..0000000
--- a/tools/relocation_packer/src/elf_traits.h
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Target-specific ELF type traits.
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_
-#define TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_
-
-#include "elf.h"
-#include "libelf.h"
-
-#if !defined(DT_MIPS_RLD_MAP_REL)
-#define DT_MIPS_RLD_MAP_REL 0x70000035
-#endif
-
-// ELF is a traits structure used to provide convenient aliases for
-// 32/64 bit Elf types and functions, depending on the target file.
-
-struct ELF32_traits {
- typedef Elf32_Addr Addr;
- typedef Elf32_Dyn Dyn;
- typedef Elf32_Ehdr Ehdr;
- typedef Elf32_Off Off;
- typedef Elf32_Phdr Phdr;
- typedef Elf32_Rel Rel;
- typedef Elf32_Rela Rela;
- typedef Elf32_Shdr Shdr;
- typedef Elf32_Sword Sword;
- typedef Elf32_Sxword Sxword;
- typedef Elf32_Sym Sym;
- typedef Elf32_Word Word;
- typedef Elf32_Xword Xword;
- typedef Elf32_Half Half;
-
- static inline Ehdr* getehdr(Elf* elf) { return elf32_getehdr(elf); }
- static inline Phdr* getphdr(Elf* elf) { return elf32_getphdr(elf); }
- static inline Shdr* getshdr(Elf_Scn* scn) { return elf32_getshdr(scn); }
- static inline Word elf_r_type(Word info) { return ELF32_R_TYPE(info); }
- static inline int elf_st_type(uint8_t info) { return ELF32_ST_TYPE(info); }
- static inline Word elf_r_sym(Word info) { return ELF32_R_SYM(info); }
-};
-
-struct ELF64_traits {
- typedef Elf64_Addr Addr;
- typedef Elf64_Dyn Dyn;
- typedef Elf64_Ehdr Ehdr;
- typedef Elf64_Off Off;
- typedef Elf64_Phdr Phdr;
- typedef Elf64_Rel Rel;
- typedef Elf64_Rela Rela;
- typedef Elf64_Shdr Shdr;
- typedef Elf64_Sword Sword;
- typedef Elf64_Sxword Sxword;
- typedef Elf64_Sym Sym;
- typedef Elf64_Word Word;
- typedef Elf64_Xword Xword;
- typedef Elf64_Half Half;
-
- static inline Ehdr* getehdr(Elf* elf) { return elf64_getehdr(elf); }
- static inline Phdr* getphdr(Elf* elf) { return elf64_getphdr(elf); }
- static inline Shdr* getshdr(Elf_Scn* scn) { return elf64_getshdr(scn); }
- static inline Xword elf_r_type(Xword info) { return ELF64_R_TYPE(info); }
- static inline int elf_st_type(uint8_t info) { return ELF64_ST_TYPE(info); }
- static inline Word elf_r_sym(Xword info) { return ELF64_R_SYM(info); }
-};
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_
diff --git a/tools/relocation_packer/src/main.cc b/tools/relocation_packer/src/main.cc
deleted file mode 100644
index 1589043..0000000
--- a/tools/relocation_packer/src/main.cc
+++ /dev/null
@@ -1,150 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Tool to pack and unpack relative relocations in a shared library.
-//
-// Invoke with -v to trace actions taken when packing or unpacking.
-// Invoke with -p to pad removed relocations with R_*_NONE. Suppresses
-// shrinking of .rel.dyn.
-// See PrintUsage() below for full usage details.
-//
-// NOTE: Breaks with libelf 0.152, which is buggy. libelf 0.158 works.
-
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <string>
-
-#include "debug.h"
-#include "elf_file.h"
-#include "elf_traits.h"
-#include "libelf.h"
-
-#include <android-base/unique_fd.h>
-
-static void PrintUsage(const char* argv0) {
- std::string temporary = argv0;
- const size_t last_slash = temporary.find_last_of("/");
- if (last_slash != temporary.npos) {
- temporary.erase(0, last_slash + 1);
- }
- const char* basename = temporary.c_str();
-
- printf(
- "Usage: %s [-u] [-v] [-p] file\n\n"
- "Pack or unpack relative relocations in a shared library.\n\n"
- " -u, --unpack unpack previously packed relative relocations\n"
- " -v, --verbose trace object file modifications (for debugging)\n"
- " -p, --pad do not shrink relocations, but pad (for debugging)\n\n",
- basename);
-
- printf(
- "Debug sections are not handled, so packing should not be used on\n"
- "shared libraries compiled for debugging or otherwise unstripped.\n");
-}
-
-int main(int argc, char* argv[]) {
- bool is_unpacking = false;
- bool is_verbose = false;
- bool is_padding = false;
-
- static const option options[] = {
- {"unpack", 0, 0, 'u'}, {"verbose", 0, 0, 'v'}, {"pad", 0, 0, 'p'},
- {"help", 0, 0, 'h'}, {NULL, 0, 0, 0}
- };
- bool has_options = true;
- while (has_options) {
- int c = getopt_long(argc, argv, "uvph", options, NULL);
- switch (c) {
- case 'u':
- is_unpacking = true;
- break;
- case 'v':
- is_verbose = true;
- break;
- case 'p':
- is_padding = true;
- break;
- case 'h':
- PrintUsage(argv[0]);
- return 0;
- case '?':
- LOG(INFO) << "Try '" << argv[0] << " --help' for more information.";
- return 1;
- case -1:
- has_options = false;
- break;
- default:
- NOTREACHED();
- return 1;
- }
- }
- if (optind != argc - 1) {
- LOG(INFO) << "Try '" << argv[0] << " --help' for more information.";
- return 1;
- }
-
- if (elf_version(EV_CURRENT) == EV_NONE) {
- LOG(WARNING) << "Elf Library is out of date!";
- }
-
- const char* file = argv[argc - 1];
- android::base::unique_fd fd(open(file, O_RDWR));
- if (fd.get() == -1) {
- LOG(ERROR) << file << ": " << strerror(errno);
- return 1;
- }
-
- if (is_verbose)
- relocation_packer::Logger::SetVerbose(1);
-
- // We need to detect elf class in order to create
- // correct implementation
- uint8_t e_ident[EI_NIDENT];
- if (TEMP_FAILURE_RETRY(read(fd.get(), e_ident, EI_NIDENT)) != EI_NIDENT) {
- LOG(ERROR) << file << ": failed to read elf header:" << strerror(errno);
- return 1;
- }
-
- if (TEMP_FAILURE_RETRY(lseek(fd.get(), 0, SEEK_SET)) != 0) {
- LOG(ERROR) << file << ": lseek to 0 failed:" << strerror(errno);
- return 1;
- }
-
- bool status = false;
-
- if (e_ident[EI_CLASS] == ELFCLASS32) {
- relocation_packer::ElfFile<ELF32_traits> elf_file(fd.get());
- elf_file.SetPadding(is_padding);
-
- if (is_unpacking) {
- status = elf_file.UnpackRelocations();
- } else {
- status = elf_file.PackRelocations();
- }
- } else if (e_ident[EI_CLASS] == ELFCLASS64) {
- relocation_packer::ElfFile<ELF64_traits> elf_file(fd.get());
- elf_file.SetPadding(is_padding);
-
- if (is_unpacking) {
- status = elf_file.UnpackRelocations();
- } else {
- status = elf_file.PackRelocations();
- }
- } else {
- LOG(ERROR) << file << ": unknown ELFCLASS: " << e_ident[EI_CLASS];
- return 1;
- }
-
- if (!status) {
- LOG(ERROR) << file << ": failed to pack/unpack file";
- return 1;
- }
-
- return 0;
-}
diff --git a/tools/relocation_packer/src/packer.cc b/tools/relocation_packer/src/packer.cc
deleted file mode 100644
index 433611f..0000000
--- a/tools/relocation_packer/src/packer.cc
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "packer.h"
-
-#include <vector>
-
-#include "debug.h"
-#include "delta_encoder.h"
-#include "elf_traits.h"
-#include "sleb128.h"
-
-namespace relocation_packer {
-
-// Pack relocations into a group encoded packed representation.
-template <typename ELF>
-void RelocationPacker<ELF>::PackRelocations(const std::vector<typename ELF::Rela>& relocations,
- std::vector<uint8_t>* packed) {
- // Run-length encode.
- std::vector<typename ELF::Addr> packed_words;
- RelocationDeltaCodec<ELF> codec;
- codec.Encode(relocations, &packed_words);
-
- // If insufficient data do nothing.
- if (packed_words.empty())
- return;
-
- Sleb128Encoder<typename ELF::Addr> sleb128_encoder;
-
- std::vector<uint8_t> sleb128_packed;
-
- sleb128_encoder.EnqueueAll(packed_words);
- sleb128_encoder.GetEncoding(&sleb128_packed);
-
- packed->push_back('A');
- packed->push_back('P');
- packed->push_back('S');
- packed->push_back('2');
- packed->insert(packed->end(), sleb128_packed.begin(), sleb128_packed.end());
-}
-
-// Unpack relative relocations from a run-length encoded packed
-// representation.
-template <typename ELF>
-void RelocationPacker<ELF>::UnpackRelocations(
- const std::vector<uint8_t>& packed,
- std::vector<typename ELF::Rela>* relocations) {
-
- std::vector<typename ELF::Addr> packed_words;
- CHECK(packed.size() > 4 &&
- packed[0] == 'A' &&
- packed[1] == 'P' &&
- packed[2] == 'S' &&
- packed[3] == '2');
-
- Sleb128Decoder<typename ELF::Addr> decoder(packed, 4);
- decoder.DequeueAll(&packed_words);
-
- RelocationDeltaCodec<ELF> codec;
- codec.Decode(packed_words, relocations);
-}
-
-template class RelocationPacker<ELF32_traits>;
-template class RelocationPacker<ELF64_traits>;
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/packer.h b/tools/relocation_packer/src/packer.h
deleted file mode 100644
index 63f50e2..0000000
--- a/tools/relocation_packer/src/packer.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Pack relative relocations into a more compact form.
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
-#define TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
-
-#include <stdint.h>
-#include <vector>
-
-#include "elf.h"
-
-namespace relocation_packer {
-
-// A RelocationPacker packs vectors of relocations into more
-// compact forms, and unpacks them to reproduce the pre-packed data.
-template <typename ELF>
-class RelocationPacker {
- public:
- // Pack relocations into a more compact form.
- // |relocations| is a vector of relocation structs.
- // |packed| is the vector of packed bytes into which relocations are packed.
- static void PackRelocations(const std::vector<typename ELF::Rela>& relocations,
- std::vector<uint8_t>* packed);
-
- // Unpack relocations from their more compact form.
- // |packed| is the vector of packed relocations.
- // |relocations| is a vector of unpacked relocation structs.
- static void UnpackRelocations(const std::vector<uint8_t>& packed,
- std::vector<typename ELF::Rela>* relocations);
-};
-
-} // namespace relocation_packer
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
diff --git a/tools/relocation_packer/src/packer_unittest.cc b/tools/relocation_packer/src/packer_unittest.cc
deleted file mode 100644
index 424b92c..0000000
--- a/tools/relocation_packer/src/packer_unittest.cc
+++ /dev/null
@@ -1,300 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "packer.h"
-
-#include <vector>
-#include "elf.h"
-#include "elf_traits.h"
-#include "gtest/gtest.h"
-
-
-template <typename ELF>
-static void AddRelocation(typename ELF::Addr addr,
- typename ELF::Xword info,
- typename ELF::Sxword addend,
- std::vector<typename ELF::Rela>* relocations) {
- typename ELF::Rela relocation;
- relocation.r_offset = addr;
- relocation.r_info = info;
- relocation.r_addend = addend;
-
- relocations->push_back(relocation);
-}
-
-template <typename ELF>
-static bool CheckRelocation(typename ELF::Addr addr,
- typename ELF::Xword info,
- typename ELF::Sxword addend,
- const typename ELF::Rela& relocation) {
- return relocation.r_offset == addr &&
- relocation.r_info == info &&
- relocation.r_addend == addend;
-}
-
-namespace relocation_packer {
-
-template <typename ELF>
-static void DoPackNoAddend() {
- std::vector<typename ELF::Rela> relocations;
- std::vector<uint8_t> packed;
- bool is_32 = sizeof(typename ELF::Addr) == 4;
- // Initial relocation.
- AddRelocation<ELF>(0xd1ce0000, 0x11, 0, &relocations);
- // Two more relocations, 4 byte deltas.
- AddRelocation<ELF>(0xd1ce0004, 0x11, 0, &relocations);
- AddRelocation<ELF>(0xd1ce0008, 0x11, 0, &relocations);
- // Three more relocations, 8 byte deltas.
- AddRelocation<ELF>(0xd1ce0010, 0x11, 0, &relocations);
- AddRelocation<ELF>(0xd1ce0018, 0x11, 0, &relocations);
- AddRelocation<ELF>(0xd1ce0020, 0x11, 0, &relocations);
-
- RelocationPacker<ELF> packer;
-
- packed.clear();
- packer.PackRelocations(relocations, &packed);
-
- ASSERT_EQ(18U, packed.size());
- // Identifier.
- size_t ndx = 0;
- EXPECT_EQ('A', packed[ndx++]);
- EXPECT_EQ('P', packed[ndx++]);
- EXPECT_EQ('S', packed[ndx++]);
- EXPECT_EQ('2', packed[ndx++]);
- // relocation count
- EXPECT_EQ(6, packed[ndx++]);
- // base relocation = 0xd1cdfffc -> fc, ff, b7, 8e, 7d/0d (32/64bit)
- EXPECT_EQ(0xfc, packed[ndx++]);
- EXPECT_EQ(0xff, packed[ndx++]);
- EXPECT_EQ(0xb7, packed[ndx++]);
- EXPECT_EQ(0x8e, packed[ndx++]);
- EXPECT_EQ(is_32 ? 0x7d : 0x0d, packed[ndx++]);
- // first group
- EXPECT_EQ(3, packed[ndx++]); // size
- EXPECT_EQ(3, packed[ndx++]); // flags
- EXPECT_EQ(4, packed[ndx++]); // r_offset_delta
- EXPECT_EQ(0x11, packed[ndx++]); // r_info
- // second group
- EXPECT_EQ(3, packed[ndx++]); // size
- EXPECT_EQ(3, packed[ndx++]); // flags
- EXPECT_EQ(8, packed[ndx++]); // r_offset_delta
- EXPECT_EQ(0x11, packed[ndx++]); // r_info
-
- EXPECT_EQ(ndx, packed.size());
-}
-
-TEST(Packer, PackNoAddend32) {
- DoPackNoAddend<ELF32_traits>();
-}
-
-TEST(Packer, PackNoAddend64) {
- DoPackNoAddend<ELF64_traits>();
-}
-
-template <typename ELF>
-static void DoUnpackNoAddend() {
- std::vector<typename ELF::Rela> relocations;
- std::vector<uint8_t> packed;
- bool is_32 = sizeof(typename ELF::Addr) == 4;
- packed.push_back('A');
- packed.push_back('P');
- packed.push_back('S');
- packed.push_back('2');
- // relocation count
- packed.push_back(6);
- // base relocation = 0xd1cdfffc -> fc, ff, b7, 8e, 7d/0d (32/64bit)
- packed.push_back(0xfc);
- packed.push_back(0xff);
- packed.push_back(0xb7);
- packed.push_back(0x8e);
- packed.push_back(is_32 ? 0x7d : 0x0d);
- // first group
- packed.push_back(3); // size
- packed.push_back(3); // flags
- packed.push_back(4); // r_offset_delta
- packed.push_back(0x11); // r_info
- // second group
- packed.push_back(3); // size
- packed.push_back(3); // flags
- packed.push_back(8); // r_offset_delta
- packed.push_back(0x11); // r_info
-
- RelocationPacker<ELF> packer;
- packer.UnpackRelocations(packed, &relocations);
-
- size_t ndx = 0;
- EXPECT_EQ(6U, relocations.size());
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0000, 0x11, 0, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0004, 0x11, 0, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0008, 0x11, 0, relocations[ndx++]));
-
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0010, 0x11, 0, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0018, 0x11, 0, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0020, 0x11, 0, relocations[ndx++]));
-
- EXPECT_EQ(ndx, relocations.size());
-}
-
-TEST(Packer, UnpackNoAddend32) {
- DoUnpackNoAddend<ELF32_traits>();
-}
-
-TEST(Packer, UnpackNoAddend64) {
- DoUnpackNoAddend<ELF64_traits>();
-}
-
-template <typename ELF>
-static void DoPackWithAddend() {
- std::vector<typename ELF::Rela> relocations;
-
- // Initial relocation.
- AddRelocation<ELF>(0xd1ce0000, 0x01, 10024, &relocations);
- // Two more relocations, 4 byte offset deltas, 12 byte addend deltas.
- AddRelocation<ELF>(0xd1ce0004, 0x01, 10012, &relocations);
- AddRelocation<ELF>(0xd1ce0008, 0x01, 10024, &relocations);
- // Three more relocations, 8 byte deltas, -24 byte addend deltas.
- AddRelocation<ELF>(0xd1ce0010, 0x01, 10000, &relocations);
- AddRelocation<ELF>(0xd1ce0018, 0x01, 9976, &relocations);
- AddRelocation<ELF>(0xd1ce0020, 0x01, 9952, &relocations);
-
- std::vector<uint8_t> packed;
-
- RelocationPacker<ELF> packer;
-
- packed.clear();
- packer.PackRelocations(relocations, &packed);
-
- EXPECT_EQ(26U, packed.size());
- size_t ndx = 0;
- // Identifier.
- EXPECT_EQ('A', packed[ndx++]);
- EXPECT_EQ('P', packed[ndx++]);
- EXPECT_EQ('S', packed[ndx++]);
- EXPECT_EQ('2', packed[ndx++]);
- // Relocation count
- EXPECT_EQ(6U, packed[ndx++]);
- // base relocation = 0xd1cdfffc -> fc, ff, b7, 8e, 0d/7d (depending on ELF::Addr)
- EXPECT_EQ(0xfc, packed[ndx++]);
- EXPECT_EQ(0xff, packed[ndx++]);
- EXPECT_EQ(0xb7, packed[ndx++]);
- EXPECT_EQ(0x8e, packed[ndx++]);
- if (sizeof(typename ELF::Addr) == 8) {
- // positive for uint64_t
- EXPECT_EQ(0x0d, packed[ndx++]);
- } else {
- // negative for uint32_t
- EXPECT_EQ(0x7d, packed[ndx++]);
- }
- // group 1
- EXPECT_EQ(0x03, packed[ndx++]); // size
- EXPECT_EQ(0x0b, packed[ndx++]); // flags
- EXPECT_EQ(0x04, packed[ndx++]); // r_offset_delta
- EXPECT_EQ(0x01, packed[ndx++]); // r_info
- // group 1 - addend 1: 10024 = 0xa8, 0xce, 0x80
- EXPECT_EQ(0xa8, packed[ndx++]);
- EXPECT_EQ(0xce, packed[ndx++]);
- EXPECT_EQ(0x00, packed[ndx++]);
- // group 1 - addend 2: -12 = 0x74
- EXPECT_EQ(0x74, packed[ndx++]);
- // group 1 - addend 3: +12 = 0x0c
- EXPECT_EQ(0x0c, packed[ndx++]);
-
- // group 2
- EXPECT_EQ(0x03, packed[ndx++]); // size
- EXPECT_EQ(0x0b, packed[ndx++]); // flags
- EXPECT_EQ(0x08, packed[ndx++]); // r_offset_delta
- EXPECT_EQ(0x01, packed[ndx++]); // r_info
-
- // group 2 - addend 1: -24 = 0x68
- EXPECT_EQ(0x68, packed[ndx++]);
- // group 2 - addend 2: -24 = 0x68
- EXPECT_EQ(0x68, packed[ndx++]);
- // group 2 - addend 3: -24 = 0x68
- EXPECT_EQ(0x68, packed[ndx++]);
-
- EXPECT_EQ(ndx, packed.size());
-}
-
-TEST(Packer, PackWithAddend) {
- DoPackWithAddend<ELF32_traits>();
- DoPackWithAddend<ELF64_traits>();
-}
-
-template <typename ELF>
-static void DoUnpackWithAddend() {
- std::vector<uint8_t> packed;
- // Identifier.
- packed.push_back('A');
- packed.push_back('P');
- packed.push_back('S');
- packed.push_back('2');
- // Relocation count
- packed.push_back(6U);
- // base relocation = 0xd1cdfffc -> fc, ff, b7, 8e, 0d
- packed.push_back(0xfc);
- packed.push_back(0xff);
- packed.push_back(0xb7);
- packed.push_back(0x8e);
- if (sizeof(typename ELF::Addr) == 8) {
- // positive for uint64_t
- packed.push_back(0x0d);
- } else {
- // negative for uint32_t
- packed.push_back(0x7d);
- }
- // group 1
- packed.push_back(0x03); // size
- packed.push_back(0x0b); // flags
- packed.push_back(0x04); // r_offset_delta
- packed.push_back(0x01); // r_info
- // group 1 - addend 1: 10024 = 0xa8, 0xce, 0x80
- packed.push_back(0xa8);
- packed.push_back(0xce);
- packed.push_back(0x00);
- // group 1 - addend 2: -12 = 0x74
- packed.push_back(0x74);
- // group 1 - addend 3: +12 = 0x0c
- packed.push_back(0x0c);
-
- // group 2
- packed.push_back(0x03); // size
- packed.push_back(0x0b); // flags
- packed.push_back(0x08); // r_offset_delta
- packed.push_back(0x01); // r_info
-
- // group 2 - addend 1: -24 = 0x68
- packed.push_back(0x68);
- // group 2 - addend 2: -24 = 0x68
- packed.push_back(0x68);
- // group 2 - addend 3: -24 = 0x68
- packed.push_back(0x68);
-
- std::vector<typename ELF::Rela> relocations;
-
- RelocationPacker<ELF> packer;
-
- relocations.clear();
- packer.UnpackRelocations(packed, &relocations);
-
- EXPECT_EQ(6U, relocations.size());
- size_t ndx = 0;
- // Initial relocation.
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0000, 0x01, 10024, relocations[ndx++]));
- // Two more relocations, 4 byte offset deltas, 12 byte addend deltas.
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0004, 0x01, 10012, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0008, 0x01, 10024, relocations[ndx++]));
- // Three more relocations, 8 byte offset deltas, -24 byte addend deltas.
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0010, 0x01, 10000, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0018, 0x01, 9976, relocations[ndx++]));
- EXPECT_TRUE(CheckRelocation<ELF>(0xd1ce0020, 0x01, 9952, relocations[ndx++]));
-
- EXPECT_EQ(ndx, relocations.size());
-}
-
-TEST(Packer, UnpackWithAddend) {
- DoUnpackWithAddend<ELF32_traits>();
- DoUnpackWithAddend<ELF64_traits>();
-}
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/sleb128.cc b/tools/relocation_packer/src/sleb128.cc
deleted file mode 100644
index 12c21e3..0000000
--- a/tools/relocation_packer/src/sleb128.cc
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sleb128.h"
-
-#include <limits.h>
-#include <stdint.h>
-#include <vector>
-
-#include "elf_traits.h"
-
-namespace {
-
-template <typename T>
-class uint_traits {};
-
-template <>
-class uint_traits<uint64_t> {
- public:
- typedef int64_t int_t;
-};
-
-template <>
-class uint_traits<uint32_t> {
- public:
- typedef int32_t int_t;
-};
-
-}
-
-namespace relocation_packer {
-
-// Empty constructor and destructor to silence chromium-style.
-template <typename uint_t>
-Sleb128Encoder<uint_t>::Sleb128Encoder() { }
-
-template <typename uint_t>
-Sleb128Encoder<uint_t>::~Sleb128Encoder() { }
-
-// Add a single value to the encoding. Values are encoded with variable
-// length. The least significant 7 bits of each byte hold 7 bits of data,
-// and the most significant bit is set on each byte except the last. The
-// value is sign extended up to a multiple of 7 bits (ensuring that the
-// most significant bit is zero for a positive number and one for a
-// negative number).
-template <typename uint_t>
-void Sleb128Encoder<uint_t>::Enqueue(uint_t value) {
- typedef typename uint_traits<uint_t>::int_t int_t;
- static const size_t size = CHAR_BIT * sizeof(value);
-
- bool more = true;
- const bool negative = static_cast<int_t>(value) < 0;
-
- while (more) {
- uint8_t byte = value & 127;
- value >>= 7;
-
- // Sign extend if encoding a -ve value.
- if (negative)
- value |= -(static_cast<uint_t>(1) << (size - 7));
-
- // The sign bit of byte is second high order bit.
- const bool sign_bit = byte & 64;
- if ((value == 0 && !sign_bit) || (value == static_cast<uint_t>(-1) && sign_bit))
- more = false;
- else
- byte |= 128;
- encoding_.push_back(byte);
- }
-}
-
-// Add a vector of values to the encoding.
-template <typename uint_t>
-void Sleb128Encoder<uint_t>::EnqueueAll(const std::vector<uint_t>& values) {
- for (size_t i = 0; i < values.size(); ++i) {
- Enqueue(values[i]);
- }
-}
-
-// Create a new decoder for the given encoded stream.
-template <typename uint_t>
-Sleb128Decoder<uint_t>::Sleb128Decoder(const std::vector<uint8_t>& encoding, size_t start_with) {
- encoding_ = encoding;
- cursor_ = start_with;
-}
-
-// Empty destructor to silence chromium-style.
-template <typename uint_t>
-Sleb128Decoder<uint_t>::~Sleb128Decoder() { }
-
-// Decode and retrieve a single value from the encoding. Consume bytes
-// until one without its most significant bit is found, and re-form the
-// value from the 7 bit fields of the bytes consumed.
-template <typename uint_t>
-uint_t Sleb128Decoder<uint_t>::Dequeue() {
- uint_t value = 0;
- static const size_t size = CHAR_BIT * sizeof(value);
-
- size_t shift = 0;
- uint8_t byte;
-
- // Loop until we reach a byte with its high order bit clear.
- do {
- byte = encoding_[cursor_++];
- value |= (static_cast<uint_t>(byte & 127) << shift);
- shift += 7;
- } while (byte & 128);
-
- // The sign bit is second high order bit of the final byte decoded.
- // Sign extend if value is -ve and we did not shift all of it.
- if (shift < size && (byte & 64))
- value |= -(static_cast<uint_t>(1) << shift);
-
- return static_cast<uint_t>(value);
-}
-
-// Decode and retrieve all remaining values from the encoding.
-template <typename uint_t>
-void Sleb128Decoder<uint_t>::DequeueAll(std::vector<uint_t>* values) {
- while (cursor_ < encoding_.size()) {
- values->push_back(Dequeue());
- }
-}
-
-template class Sleb128Encoder<uint32_t>;
-template class Sleb128Encoder<uint64_t>;
-template class Sleb128Decoder<uint32_t>;
-template class Sleb128Decoder<uint64_t>;
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/src/sleb128.h b/tools/relocation_packer/src/sleb128.h
deleted file mode 100644
index 3a63f66..0000000
--- a/tools/relocation_packer/src/sleb128.h
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// SLEB128 encoder and decoder for packed relative relocations.
-//
-// Packed relocations consist of a large number of relatively small
-// integer values. Encoding these as LEB128 saves space.
-//
-// For more on LEB128 see http://en.wikipedia.org/wiki/LEB128.
-
-#ifndef TOOLS_RELOCATION_PACKER_SRC_SLEB128_H_
-#define TOOLS_RELOCATION_PACKER_SRC_SLEB128_H_
-
-#include <stdint.h>
-#include <unistd.h>
-#include <vector>
-
-#include "elf_traits.h"
-
-namespace relocation_packer {
-
-// Encode packed words as a signed LEB128 byte stream.
-template<typename int_t>
-class Sleb128Encoder {
- public:
- // Explicit (but empty) constructor and destructor, for chromium-style.
- Sleb128Encoder();
- ~Sleb128Encoder();
-
- // Add a value to the encoding stream.
- // |value| is the signed int to add.
- void Enqueue(int_t value);
-
- // Add a vector of values to the encoding stream.
- // |values| is the vector of signed ints to add.
- void EnqueueAll(const std::vector<int_t>& values);
-
- // Retrieve the encoded representation of the values.
- // |encoding| is the returned vector of encoded data.
- void GetEncoding(std::vector<uint8_t>* encoding) { *encoding = encoding_; }
-
- private:
- // Growable vector holding the encoded LEB128 stream.
- std::vector<uint8_t> encoding_;
-};
-
-// Decode a LEB128 byte stream to produce packed words.
-template <typename int_t>
-class Sleb128Decoder {
- public:
- // Create a new decoder for the given encoded stream.
- // |encoding| is the vector of encoded data.
- explicit Sleb128Decoder(const std::vector<uint8_t>& encoding, size_t start_with);
-
- // Explicit (but empty) destructor, for chromium-style.
- ~Sleb128Decoder();
-
- // Retrieve the next value from the encoded stream.
- int_t Dequeue();
-
- // Retrieve all remaining values from the encoded stream.
- // |values| is the vector of decoded data.
- void DequeueAll(std::vector<int_t>* values);
-
- private:
- // Encoded LEB128 stream.
- std::vector<uint8_t> encoding_;
-
- // Cursor indicating the current stream retrieval point.
- size_t cursor_;
-};
-
-} // namespace relocation_packer
-
-#endif // TOOLS_RELOCATION_PACKER_SRC_SLEB128_H_
diff --git a/tools/relocation_packer/src/sleb128_unittest.cc b/tools/relocation_packer/src/sleb128_unittest.cc
deleted file mode 100644
index 49a553c..0000000
--- a/tools/relocation_packer/src/sleb128_unittest.cc
+++ /dev/null
@@ -1,166 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sleb128.h"
-
-#include <vector>
-#include "elf_traits.h"
-#include "gtest/gtest.h"
-
-namespace relocation_packer {
-
-TEST(Sleb128, Encoder64) {
- std::vector<uint64_t> values;
- values.push_back(624485U);
- values.push_back(0U);
- values.push_back(1U);
- values.push_back(63U);
- values.push_back(64U);
- values.push_back(static_cast<uint64_t>(-1));
- values.push_back(static_cast<uint64_t>(-624485));
-
- Sleb128Encoder<uint64_t> encoder;
- encoder.EnqueueAll(values);
-
- encoder.Enqueue(2147483647U);
- encoder.Enqueue(static_cast<uint64_t>(-2147483648));
- encoder.Enqueue(9223372036854775807ULL);
- encoder.Enqueue(static_cast<uint64_t>(-9223372036854775807LL - 1));
-
- std::vector<uint8_t> encoding;
- encoder.GetEncoding(&encoding);
-
- EXPECT_EQ(42u, encoding.size());
- // 624485
- EXPECT_EQ(0xe5, encoding[0]);
- EXPECT_EQ(0x8e, encoding[1]);
- EXPECT_EQ(0x26, encoding[2]);
- // 0
- EXPECT_EQ(0x00, encoding[3]);
- // 1
- EXPECT_EQ(0x01, encoding[4]);
- // 63
- EXPECT_EQ(0x3f, encoding[5]);
- // 64
- EXPECT_EQ(0xc0, encoding[6]);
- EXPECT_EQ(0x00, encoding[7]);
- // -1
- EXPECT_EQ(0x7f, encoding[8]);
- // -624485
- EXPECT_EQ(0x9b, encoding[9]);
- EXPECT_EQ(0xf1, encoding[10]);
- EXPECT_EQ(0x59, encoding[11]);
- // 2147483647
- EXPECT_EQ(0xff, encoding[12]);
- EXPECT_EQ(0xff, encoding[13]);
- EXPECT_EQ(0xff, encoding[14]);
- EXPECT_EQ(0xff, encoding[15]);
- EXPECT_EQ(0x07, encoding[16]);
- // -2147483648
- EXPECT_EQ(0x80, encoding[17]);
- EXPECT_EQ(0x80, encoding[18]);
- EXPECT_EQ(0x80, encoding[19]);
- EXPECT_EQ(0x80, encoding[20]);
- EXPECT_EQ(0x78, encoding[21]);
- // 9223372036854775807
- EXPECT_EQ(0xff, encoding[22]);
- EXPECT_EQ(0xff, encoding[23]);
- EXPECT_EQ(0xff, encoding[24]);
- EXPECT_EQ(0xff, encoding[25]);
- EXPECT_EQ(0xff, encoding[26]);
- EXPECT_EQ(0xff, encoding[27]);
- EXPECT_EQ(0xff, encoding[28]);
- EXPECT_EQ(0xff, encoding[29]);
- EXPECT_EQ(0xff, encoding[30]);
- EXPECT_EQ(0x00, encoding[31]);
- // -9223372036854775808
- EXPECT_EQ(0x80, encoding[32]);
- EXPECT_EQ(0x80, encoding[33]);
- EXPECT_EQ(0x80, encoding[34]);
- EXPECT_EQ(0x80, encoding[35]);
- EXPECT_EQ(0x80, encoding[36]);
- EXPECT_EQ(0x80, encoding[37]);
- EXPECT_EQ(0x80, encoding[38]);
- EXPECT_EQ(0x80, encoding[39]);
- EXPECT_EQ(0x80, encoding[40]);
- EXPECT_EQ(0x7f, encoding[41]);
-}
-
-TEST(Sleb128, Decoder) {
- std::vector<uint8_t> encoding;
- // 624485
- encoding.push_back(0xe5);
- encoding.push_back(0x8e);
- encoding.push_back(0x26);
- // 0
- encoding.push_back(0x00);
- // 1
- encoding.push_back(0x01);
- // 63
- encoding.push_back(0x3f);
- // 64
- encoding.push_back(0xc0);
- encoding.push_back(0x00);
- // -1
- encoding.push_back(0x7f);
- // -624485
- encoding.push_back(0x9b);
- encoding.push_back(0xf1);
- encoding.push_back(0x59);
- // 2147483647
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0x07);
- // -2147483648
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x78);
- // 9223372036854775807
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0xff);
- encoding.push_back(0x00);
- // -9223372036854775808
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x80);
- encoding.push_back(0x7f);
-
- Sleb128Decoder<uint64_t> decoder(encoding, 0);
-
- EXPECT_EQ(624485U, decoder.Dequeue());
-
- std::vector<uint64_t> dequeued;
- decoder.DequeueAll(&dequeued);
-
- EXPECT_EQ(10U, dequeued.size());
- EXPECT_EQ(0U, dequeued[0]);
- EXPECT_EQ(1U, dequeued[1]);
- EXPECT_EQ(63U, dequeued[2]);
- EXPECT_EQ(64U, dequeued[3]);
- EXPECT_EQ(static_cast<uint64_t>(-1), dequeued[4]);
- EXPECT_EQ(static_cast<uint64_t>(-624485), dequeued[5]);
- EXPECT_EQ(2147483647U, dequeued[6]);
- EXPECT_EQ(static_cast<uint64_t>(-2147483648), dequeued[7]);
- EXPECT_EQ(9223372036854775807ULL, dequeued[8]);
- EXPECT_EQ(static_cast<uint64_t>(-9223372036854775807LL - 1), dequeued[9]);
-}
-
-} // namespace relocation_packer
diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs.cc b/tools/relocation_packer/test_data/elf_file_unittest_relocs.cc
deleted file mode 100644
index 5e1fa74..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs.cc
+++ /dev/null
@@ -1,1014 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Test data for packing/unpacking. When compiled, creates a run of
-// relative relocations.
-//
-// See generate_elf_file_unittest_relocs.sh for instructions on how to build
-// unit test data from this source file.
-
-const int i = 0;
-
-// Generator:
-// python -c 'for i in xrange(0,1000):print"const void* pointer_%d = &i;"%i'
-const void* pointer_0 = &i;
-const void* pointer_1 = &i;
-const void* pointer_2 = &i;
-const void* pointer_3 = &i;
-const void* pointer_4 = &i;
-const void* pointer_5 = &i;
-const void* pointer_6 = &i;
-const void* pointer_7 = &i;
-const void* pointer_8 = &i;
-const void* pointer_9 = &i;
-const void* pointer_10 = &i;
-const void* pointer_11 = &i;
-const void* pointer_12 = &i;
-const void* pointer_13 = &i;
-const void* pointer_14 = &i;
-const void* pointer_15 = &i;
-const void* pointer_16 = &i;
-const void* pointer_17 = &i;
-const void* pointer_18 = &i;
-const void* pointer_19 = &i;
-const void* pointer_20 = &i;
-const void* pointer_21 = &i;
-const void* pointer_22 = &i;
-const void* pointer_23 = &i;
-const void* pointer_24 = &i;
-const void* pointer_25 = &i;
-const void* pointer_26 = &i;
-const void* pointer_27 = &i;
-const void* pointer_28 = &i;
-const void* pointer_29 = &i;
-const void* pointer_30 = &i;
-const void* pointer_31 = &i;
-const void* pointer_32 = &i;
-const void* pointer_33 = &i;
-const void* pointer_34 = &i;
-const void* pointer_35 = &i;
-const void* pointer_36 = &i;
-const void* pointer_37 = &i;
-const void* pointer_38 = &i;
-const void* pointer_39 = &i;
-const void* pointer_40 = &i;
-const void* pointer_41 = &i;
-const void* pointer_42 = &i;
-const void* pointer_43 = &i;
-const void* pointer_44 = &i;
-const void* pointer_45 = &i;
-const void* pointer_46 = &i;
-const void* pointer_47 = &i;
-const void* pointer_48 = &i;
-const void* pointer_49 = &i;
-const void* pointer_50 = &i;
-const void* pointer_51 = &i;
-const void* pointer_52 = &i;
-const void* pointer_53 = &i;
-const void* pointer_54 = &i;
-const void* pointer_55 = &i;
-const void* pointer_56 = &i;
-const void* pointer_57 = &i;
-const void* pointer_58 = &i;
-const void* pointer_59 = &i;
-const void* pointer_60 = &i;
-const void* pointer_61 = &i;
-const void* pointer_62 = &i;
-const void* pointer_63 = &i;
-const void* pointer_64 = &i;
-const void* pointer_65 = &i;
-const void* pointer_66 = &i;
-const void* pointer_67 = &i;
-const void* pointer_68 = &i;
-const void* pointer_69 = &i;
-const void* pointer_70 = &i;
-const void* pointer_71 = &i;
-const void* pointer_72 = &i;
-const void* pointer_73 = &i;
-const void* pointer_74 = &i;
-const void* pointer_75 = &i;
-const void* pointer_76 = &i;
-const void* pointer_77 = &i;
-const void* pointer_78 = &i;
-const void* pointer_79 = &i;
-const void* pointer_80 = &i;
-const void* pointer_81 = &i;
-const void* pointer_82 = &i;
-const void* pointer_83 = &i;
-const void* pointer_84 = &i;
-const void* pointer_85 = &i;
-const void* pointer_86 = &i;
-const void* pointer_87 = &i;
-const void* pointer_88 = &i;
-const void* pointer_89 = &i;
-const void* pointer_90 = &i;
-const void* pointer_91 = &i;
-const void* pointer_92 = &i;
-const void* pointer_93 = &i;
-const void* pointer_94 = &i;
-const void* pointer_95 = &i;
-const void* pointer_96 = &i;
-const void* pointer_97 = &i;
-const void* pointer_98 = &i;
-const void* pointer_99 = &i;
-const void* pointer_100 = &i;
-const void* pointer_101 = &i;
-const void* pointer_102 = &i;
-const void* pointer_103 = &i;
-const void* pointer_104 = &i;
-const void* pointer_105 = &i;
-const void* pointer_106 = &i;
-const void* pointer_107 = &i;
-const void* pointer_108 = &i;
-const void* pointer_109 = &i;
-const void* pointer_110 = &i;
-const void* pointer_111 = &i;
-const void* pointer_112 = &i;
-const void* pointer_113 = &i;
-const void* pointer_114 = &i;
-const void* pointer_115 = &i;
-const void* pointer_116 = &i;
-const void* pointer_117 = &i;
-const void* pointer_118 = &i;
-const void* pointer_119 = &i;
-const void* pointer_120 = &i;
-const void* pointer_121 = &i;
-const void* pointer_122 = &i;
-const void* pointer_123 = &i;
-const void* pointer_124 = &i;
-const void* pointer_125 = &i;
-const void* pointer_126 = &i;
-const void* pointer_127 = &i;
-const void* pointer_128 = &i;
-const void* pointer_129 = &i;
-const void* pointer_130 = &i;
-const void* pointer_131 = &i;
-const void* pointer_132 = &i;
-const void* pointer_133 = &i;
-const void* pointer_134 = &i;
-const void* pointer_135 = &i;
-const void* pointer_136 = &i;
-const void* pointer_137 = &i;
-const void* pointer_138 = &i;
-const void* pointer_139 = &i;
-const void* pointer_140 = &i;
-const void* pointer_141 = &i;
-const void* pointer_142 = &i;
-const void* pointer_143 = &i;
-const void* pointer_144 = &i;
-const void* pointer_145 = &i;
-const void* pointer_146 = &i;
-const void* pointer_147 = &i;
-const void* pointer_148 = &i;
-const void* pointer_149 = &i;
-const void* pointer_150 = &i;
-const void* pointer_151 = &i;
-const void* pointer_152 = &i;
-const void* pointer_153 = &i;
-const void* pointer_154 = &i;
-const void* pointer_155 = &i;
-const void* pointer_156 = &i;
-const void* pointer_157 = &i;
-const void* pointer_158 = &i;
-const void* pointer_159 = &i;
-const void* pointer_160 = &i;
-const void* pointer_161 = &i;
-const void* pointer_162 = &i;
-const void* pointer_163 = &i;
-const void* pointer_164 = &i;
-const void* pointer_165 = &i;
-const void* pointer_166 = &i;
-const void* pointer_167 = &i;
-const void* pointer_168 = &i;
-const void* pointer_169 = &i;
-const void* pointer_170 = &i;
-const void* pointer_171 = &i;
-const void* pointer_172 = &i;
-const void* pointer_173 = &i;
-const void* pointer_174 = &i;
-const void* pointer_175 = &i;
-const void* pointer_176 = &i;
-const void* pointer_177 = &i;
-const void* pointer_178 = &i;
-const void* pointer_179 = &i;
-const void* pointer_180 = &i;
-const void* pointer_181 = &i;
-const void* pointer_182 = &i;
-const void* pointer_183 = &i;
-const void* pointer_184 = &i;
-const void* pointer_185 = &i;
-const void* pointer_186 = &i;
-const void* pointer_187 = &i;
-const void* pointer_188 = &i;
-const void* pointer_189 = &i;
-const void* pointer_190 = &i;
-const void* pointer_191 = &i;
-const void* pointer_192 = &i;
-const void* pointer_193 = &i;
-const void* pointer_194 = &i;
-const void* pointer_195 = &i;
-const void* pointer_196 = &i;
-const void* pointer_197 = &i;
-const void* pointer_198 = &i;
-const void* pointer_199 = &i;
-const void* pointer_200 = &i;
-const void* pointer_201 = &i;
-const void* pointer_202 = &i;
-const void* pointer_203 = &i;
-const void* pointer_204 = &i;
-const void* pointer_205 = &i;
-const void* pointer_206 = &i;
-const void* pointer_207 = &i;
-const void* pointer_208 = &i;
-const void* pointer_209 = &i;
-const void* pointer_210 = &i;
-const void* pointer_211 = &i;
-const void* pointer_212 = &i;
-const void* pointer_213 = &i;
-const void* pointer_214 = &i;
-const void* pointer_215 = &i;
-const void* pointer_216 = &i;
-const void* pointer_217 = &i;
-const void* pointer_218 = &i;
-const void* pointer_219 = &i;
-const void* pointer_220 = &i;
-const void* pointer_221 = &i;
-const void* pointer_222 = &i;
-const void* pointer_223 = &i;
-const void* pointer_224 = &i;
-const void* pointer_225 = &i;
-const void* pointer_226 = &i;
-const void* pointer_227 = &i;
-const void* pointer_228 = &i;
-const void* pointer_229 = &i;
-const void* pointer_230 = &i;
-const void* pointer_231 = &i;
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-const void* pointer_856 = &i;
-const void* pointer_857 = &i;
-const void* pointer_858 = &i;
-const void* pointer_859 = &i;
-const void* pointer_860 = &i;
-const void* pointer_861 = &i;
-const void* pointer_862 = &i;
-const void* pointer_863 = &i;
-const void* pointer_864 = &i;
-const void* pointer_865 = &i;
-const void* pointer_866 = &i;
-const void* pointer_867 = &i;
-const void* pointer_868 = &i;
-const void* pointer_869 = &i;
-const void* pointer_870 = &i;
-const void* pointer_871 = &i;
-const void* pointer_872 = &i;
-const void* pointer_873 = &i;
-const void* pointer_874 = &i;
-const void* pointer_875 = &i;
-const void* pointer_876 = &i;
-const void* pointer_877 = &i;
-const void* pointer_878 = &i;
-const void* pointer_879 = &i;
-const void* pointer_880 = &i;
-const void* pointer_881 = &i;
-const void* pointer_882 = &i;
-const void* pointer_883 = &i;
-const void* pointer_884 = &i;
-const void* pointer_885 = &i;
-const void* pointer_886 = &i;
-const void* pointer_887 = &i;
-const void* pointer_888 = &i;
-const void* pointer_889 = &i;
-const void* pointer_890 = &i;
-const void* pointer_891 = &i;
-const void* pointer_892 = &i;
-const void* pointer_893 = &i;
-const void* pointer_894 = &i;
-const void* pointer_895 = &i;
-const void* pointer_896 = &i;
-const void* pointer_897 = &i;
-const void* pointer_898 = &i;
-const void* pointer_899 = &i;
-const void* pointer_900 = &i;
-const void* pointer_901 = &i;
-const void* pointer_902 = &i;
-const void* pointer_903 = &i;
-const void* pointer_904 = &i;
-const void* pointer_905 = &i;
-const void* pointer_906 = &i;
-const void* pointer_907 = &i;
-const void* pointer_908 = &i;
-const void* pointer_909 = &i;
-const void* pointer_910 = &i;
-const void* pointer_911 = &i;
-const void* pointer_912 = &i;
-const void* pointer_913 = &i;
-const void* pointer_914 = &i;
-const void* pointer_915 = &i;
-const void* pointer_916 = &i;
-const void* pointer_917 = &i;
-const void* pointer_918 = &i;
-const void* pointer_919 = &i;
-const void* pointer_920 = &i;
-const void* pointer_921 = &i;
-const void* pointer_922 = &i;
-const void* pointer_923 = &i;
-const void* pointer_924 = &i;
-const void* pointer_925 = &i;
-const void* pointer_926 = &i;
-const void* pointer_927 = &i;
-const void* pointer_928 = &i;
-const void* pointer_929 = &i;
-const void* pointer_930 = &i;
-const void* pointer_931 = &i;
-const void* pointer_932 = &i;
-const void* pointer_933 = &i;
-const void* pointer_934 = &i;
-const void* pointer_935 = &i;
-const void* pointer_936 = &i;
-const void* pointer_937 = &i;
-const void* pointer_938 = &i;
-const void* pointer_939 = &i;
-const void* pointer_940 = &i;
-const void* pointer_941 = &i;
-const void* pointer_942 = &i;
-const void* pointer_943 = &i;
-const void* pointer_944 = &i;
-const void* pointer_945 = &i;
-const void* pointer_946 = &i;
-const void* pointer_947 = &i;
-const void* pointer_948 = &i;
-const void* pointer_949 = &i;
-const void* pointer_950 = &i;
-const void* pointer_951 = &i;
-const void* pointer_952 = &i;
-const void* pointer_953 = &i;
-const void* pointer_954 = &i;
-const void* pointer_955 = &i;
-const void* pointer_956 = &i;
-const void* pointer_957 = &i;
-const void* pointer_958 = &i;
-const void* pointer_959 = &i;
-const void* pointer_960 = &i;
-const void* pointer_961 = &i;
-const void* pointer_962 = &i;
-const void* pointer_963 = &i;
-const void* pointer_964 = &i;
-const void* pointer_965 = &i;
-const void* pointer_966 = &i;
-const void* pointer_967 = &i;
-const void* pointer_968 = &i;
-const void* pointer_969 = &i;
-const void* pointer_970 = &i;
-const void* pointer_971 = &i;
-const void* pointer_972 = &i;
-const void* pointer_973 = &i;
-const void* pointer_974 = &i;
-const void* pointer_975 = &i;
-const void* pointer_976 = &i;
-const void* pointer_977 = &i;
-const void* pointer_978 = &i;
-const void* pointer_979 = &i;
-const void* pointer_980 = &i;
-const void* pointer_981 = &i;
-const void* pointer_982 = &i;
-const void* pointer_983 = &i;
-const void* pointer_984 = &i;
-const void* pointer_985 = &i;
-const void* pointer_986 = &i;
-const void* pointer_987 = &i;
-const void* pointer_988 = &i;
-const void* pointer_989 = &i;
-const void* pointer_990 = &i;
-const void* pointer_991 = &i;
-const void* pointer_992 = &i;
-const void* pointer_993 = &i;
-const void* pointer_994 = &i;
-const void* pointer_995 = &i;
-const void* pointer_996 = &i;
-const void* pointer_997 = &i;
-const void* pointer_998 = &i;
-const void* pointer_999 = &i;
diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32.so
deleted file mode 100755
index 5e339ae..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32_packed.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32_packed.so
deleted file mode 100755
index 253dd97..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm32_packed.so
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64.so
deleted file mode 100755
index d3d0194..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64_packed.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64_packed.so
deleted file mode 100755
index 269b975..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_arm64_packed.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32.so
deleted file mode 100755
index 42db62c..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32_packed.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32_packed.so
deleted file mode 100755
index 27817cc..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_ia32_packed.so
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32.so
deleted file mode 100755
index 6da324b..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32_packed.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32_packed.so
deleted file mode 100755
index b11ca48..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32_packed.so
+++ /dev/null
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diff --git a/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64.so b/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64.so
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index 6cb689e..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64.so
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deleted file mode 100755
index 60b9ad1..0000000
--- a/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64_packed.so
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