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f4cac27dc0
This is a preparatory rework to allow uncoupling virtual and physical addresses spaces. The vmcore ELF program headers describe virtual memory regions of a crashed kernel. User level tools use that information for the kernel text and data analysis (e.g vmcore-dmesg extracts the kernel log). Currently the kernel image is covered by program headers describing the identity mapping regions. But in the future the kernel image will be mapped into separate region outside of the identity mapping. Create the additional ELF program header that covers kernel image only, so that vmcore tools could locate kernel text and data. Further, the identity mapping in crashed and capture kernels will have different base address. Due to that __va() macro can not be used in the capture kernel. Instead, read crashed kernel identity mapping base address from os_info and use it for PT_LOAD type program headers creation. Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.