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([145.224.119.89]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-624841586c1sm1302244d50.6.2025.09.12.08.10.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Sep 2025 08:10:09 -0700 (PDT) From: Eugen Hristev To: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, tglx@linutronix.de, andersson@kernel.org, pmladek@suse.com, rdunlap@infradead.org, corbet@lwn.net, david@redhat.com, mhocko@suse.com Cc: tudor.ambarus@linaro.org, mukesh.ojha@oss.qualcomm.com, linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, jonechou@google.com, rostedt@goodmis.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, Eugen Hristev Subject: [RFC][PATCH v3 04/16] Documentation: kmemdump: Add section for coreimage ELF Date: Fri, 12 Sep 2025 18:08:43 +0300 Message-ID: <20250912150855.2901211-5-eugen.hristev@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250912150855.2901211-1-eugen.hristev@linaro.org> References: <20250912150855.2901211-1-eugen.hristev@linaro.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add section describing the utility of coreimage ELF generation for kmemdump. Signed-off-by: Eugen Hristev --- Documentation/dev-tools/kmemdump.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/dev-tools/kmemdump.rst b/Documentation/dev-tools/kmemdump.rst index 504321de951a..5616843e0407 100644 --- a/Documentation/dev-tools/kmemdump.rst +++ b/Documentation/dev-tools/kmemdump.rst @@ -27,6 +27,14 @@ are limited. Although the kernel has multiple debugging mechanisms, kmemdump fits a particular model which is not covered by the others. +kmemdump can also prepare specific regions of the kernel that can be +put together to form a minimal core image file. To achieve this, the first +region is an ELF header with program headers for each region, and another +region contains specific ELF NOTE section with vmcoreinfo. +There are also multiple regions registered with basic kernel information +that will allow debugging tools like 'crash' to load the image. +To enable this feature, use CONFIG_KMEMDUMP_COREIMAGE. + kmemdump Internals ================== -- 2.43.0