arm64支持objtool以及ORC推栈

【项目难度】：进阶

【项目描述】：objtool是x86上实现的二进制文件分析工具，其主要功能用于支持x86上的可靠推栈方案：通过编译时生成ORC推栈元数据，可以在内核运行时实现可靠推栈。由于可靠推栈是内核热补丁功能的必要条件，arm64目前只支持FP推栈，将objtool以及ORC推栈移植到arm64是有价值的。

【产出标准】：
1.openEuler 合入实现 arm64 ORC unwinder 的PR

2.功能测试的测试设计，测试用例与测试报告

【技术要求】：
linux内核开发技术栈

【导师姓名/导师邮箱】：
chenzhongjin@huawei.com

【成果提交仓库】：
https://gitee.com/openeuler/kernel

project name：objtool and ORC Unwinder Porting to arm64

【Difficulty】：Advanced

【Description】：
objtool is a binary file analysis tool implemented on x86 architecture. Its primary function is to support reliable stack unwinding on x86 by generating ORC stack unwinding metadata at compile time, which enables reliable stack unwinding at runtime in the kernel. Since reliable stack unwinding is a necessary condition for kernel hot patching, arm64 currently only supports FP stack unwinding. Porting objtool and ORC stack unwinding to arm64 is valuable.

【Output Requirements】：
 1. Merge the implementation of arm64 ORC unwinder into openEuler.
 2. Design of functional tests, test cases, and test reports.

【Technical Requirements】：
Linux kernel development experience

【Mentor/Email】：
 chenzhongjin@huawei.com
【Project Repository】：
https://gitee.com/openeuler/kernel

GVP openEuler/kernel

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