The elfutils project provides libraries and tools for ELF files and DWARF data.

The project home is http://elfutils.org/

Releases are published at ftp://sourceware.org/pub/elfutils/
Which can also be found at https://sourceware.org/elfutils/ftp/

To build a release do: ./configure && make && make check
Please check the configure summary to make sure all recommended
features are enabled. There should be no failures after make check.

Please reports bugs at https://sourceware.org/bugzilla/

The current elfutils source code can be checked out with
git clone git://sourceware.org/git/elfutils.git

To build a git checkout do:
  autoreconf -i -f && \
  ./configure --enable-maintainer-mode && \
  make && make check

The developer mailinglist to send patches to is
elfutils-devel@sourceware.org.
https://sourceware.org/ml/elfutils-devel/

To subscribe send an email to elfutils-devel-subscribe@sourceware.org
Or use the form at https://sourceware.org/mailman/listinfo/elfutils-devel

See the CONTRIBUTING file for how to propose patches to the code.

See the NOTES files for some design decisions and notes.

See the SECURITY file for defining and handling security-sensitive bugs.

[
  {
    "Name": "elfutils",
    "License": "LGPL-2.1, LGPL-3.0, GPL-2.0",
    "License File": "COPYING-GPLV2",
    "Version Number": "0.190",
    "Owner": "zhanghaibo0@huawei.com",
    "Upstream URL": "https://sourceware.org/elfutils/",
    "Description": "A collection of tools and libraries for reading, creating and modifying ELF binaries, finding and processing DWARF debug data, symbols, thread status, and stack trace of processes and core files on GNU/Linux."
  }
]

# elfutils

仓库包含第三方开源软件elfutils，elfutils是一个用于读取、创建和修改ELF二进制文件，查找和处理GNU/Linux上进程和核心文件的DWARF调试数据、符号、线程状态和堆栈跟踪的工具和库的集合。libabigail软件依赖了elfutils。

## 目录结构

```
backends/      不同平台的后端实现
doc/           文档
lib/           公共库源码
libasm/        asm相关库源码
libcpu/        cpu相关库源码
libdw/         dw相关库源码
libdwelf/      dwelf相关库源码
libdwfl/       dwfl相关库源码
libebl/        ebl相关库源码
libelf/        elf相关库源码
src/           源文件
tests/         测试目录
COPYING        证书文件
COPYING-GPLV2  证书文件
COPYING-LGPLV3 证书文件
README         README说明
```

## OpenHarmony如何使用elfutils

OpenHarmony上elfutils是用作libabigail的依赖软件，libabigail在生成ABI特征文件的时候，需要通过elfutils读取二进制库内的DWARF调试数据。

## OpenHarmony如何集成elfutils

libabigail的编译依赖了elfutils，elfutils被集成到libabigail工具中。

### 1.elfutils的编译

elfutils的编译入口在其根目录下的BUILD.gn中。简单示意如下：

```makefile
# Build libelf
ohos_static_library("libelf_static") {
  configs = [ ":elfutils_defaults" ]

  sources = sources_libelf
  include_dirs = [
    "//third_party/elfutils",
    "//third_party/elfutils/lib",
    "//third_party/elfutils/libelf",
  ]
  deps = [ "//third_party/zlib:libz" ]

  subsystem_name = "thirdparty"
  part_name = "elfutils"
}

# Build libdw
ohos_static_library("libdw_static") {
  configs = [ ":elfutils_defaults" ]

  sources = sources_backends
  sources += sources_libcpu
  sources += sources_libdw
  sources += sources_libdwelf
  sources += sources_libdwfl
  sources += sources_libebl

  include_dirs = [
    "//third_party/elfutils",
    "//third_party/elfutils/lib",
    "//third_party/elfutils/libasm",
    "//third_party/elfutils/libelf",
    "//third_party/elfutils/libcpu",
    "//third_party/elfutils/libdw",
    "//third_party/elfutils/libdwelf",
    "//third_party/elfutils/libdwfl",
    "//third_party/elfutils/libebl",
  ]
  deps = [ ":libelf_static" ]

  subsystem_name = "thirdparty"
  part_name = "elfutils"
}

```

### 2.使用elfutils

libabigail的编译依赖了elfutils。简单示意如下：

```makefile
ohos_static_library("libabigail_static") {
  configs = [ "//third_party/libabigail:libabigail_defaults" ]

  sources = [
    ......
  ]

  include_dirs = [
    ......
  ]

  external_deps = [
    "//third_party/elfutils:libdw_static",
  ]

  subsystem_name = "thirdparty"
  part_name = "libabigail"
}
```
## elfutils相关内容

[elfutils官网](https://sourceware.org/elfutils/)

## License

- `LGPL V3.0`


- `GPL V2.0`


- `GPL V3.0`

## 风险提示

**<u>‍elfutils是LGPLV3和GPLV3协议类型的三方开源软件，请谨慎使用，使用时须履行相应的开源义务。</u>**