linux-kernel - [RFC][PATCH v3 04/16] Documentation: kmemdump: Add section for coreimage ELF

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Message-ID: <20250912150855.2901211-5-eugen.hristev@linaro.org>
Date: Fri, 12 Sep 2025 18:08:43 +0300
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	tglx@...utronix.de,
	andersson@...nel.org,
	pmladek@...e.com,
	rdunlap@...radead.org,
	corbet@....net,
	david@...hat.com,
	mhocko@...e.com
Cc: tudor.ambarus@...aro.org,
	mukesh.ojha@....qualcomm.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-hardening@...r.kernel.org,
	jonechou@...gle.com,
	rostedt@...dmis.org,
	linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org,
	Eugen Hristev <eugen.hristev@...aro.org>
Subject: [RFC][PATCH v3 04/16] Documentation: kmemdump: Add section for coreimage ELF

Add section describing the utility of coreimage ELF generation for
kmemdump.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 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