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d3023897b4
The DIE_TRAP notifier chain is run both for kprobe traps and for BUG/WARN traps. The kprobe code assumes to be only called for BREAKPOINT_INSTRUCTION, and concludes to have hit a concurrently removed kprobe if it finds anything else at the faulting locations. This includes TRAPA_BUG_OPCODE used for BUG and WARN. The consequence is that kprobe_handler returns 1. This makes kprobe_exceptions_notify return NOTIFY_STOP, and prevents handling the BUG statement. This also prevents moving $pc away from the trap instruction, so the system locks up in an endless loop Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> |
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| README | ||
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 Restructured Text 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.