bf740a905f
The kernel is responsible for mapping the vDSO into userspace processes, including mapping the text section as executable. Handle the mapping of the vDSO for BTI similarly, mapping the text section as guarded pages so the BTI annotations in the vDSO become effective when they are present. This will mean that we can have BTI active for the vDSO in processes that do not otherwise support BTI. This should not be an issue for any expected use of the vDSO. Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20200506195138.22086-12-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
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.