linux-kernel - [PATCH v8 0/2] bpftool: Refactor config parsing and add CET symbol matching

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Message-Id: <20250829061107.23905-1-chenyuan_fl@163.com>
Date: Fri, 29 Aug 2025 07:11:05 +0100
From: chenyuan_fl@....com
To: qmo@...nel.org,
	ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org
Cc: yonghong.song@...ux.dev,
	olsajiri@...il.com,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	chenyuan@...inos.cn
Subject: [PATCH v8 0/2] bpftool: Refactor config parsing and add CET symbol matching

From: Yuan CHen <chenyuan@...inos.cn>

1. **Refactor kernel config parsing**  
   - Moves duplicate config file handling from feature.c to common.c  
   - Keeps all existing functionality while enabling code reuse  

2. **Add CET-aware symbol matching**  
   - Adjusts kprobe hook detection for x86_64 CET (endbr32/64 prefixes)  
   - Matches symbols at both original and CET-adjusted addresses  

Changed in PATCH v4:
* Refactor repeated code into a function.
* Add detection for the x86 architecture.

Changed int PATH v5:
* Remove detection for the x86 architecture.

 Changed in PATCH v6:
* Add new helper patch (1/2) to refactor kernel config reading
* Use the new read_kernel_config() in CET symbol matching (2/2) to check CONFIG_X86_KERNEL_IBT

Changed in PATCH v7:
* Display actual kprobe attachment addresses instead of symbol addresses

Yuan Chen (2):
  bpftool: Refactor kernel config reading into common helper
  bpftool: Add CET-aware symbol matching for x86_64 architectures

 tools/bpf/bpftool/common.c  | 93 +++++++++++++++++++++++++++++++++++++
 tools/bpf/bpftool/feature.c | 86 ++--------------------------------
 tools/bpf/bpftool/link.c    | 38 ++++++++++++++-
 tools/bpf/bpftool/main.h    |  9 ++++
 4 files changed, 142 insertions(+), 84 deletions(-)

-- 
2.39.5