mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-05 10:31:46 +09:00
c1aff5682d
Currently literal pool register is loaded using basr, which makes it point not to the beginning of the literal pool, but rather to the next instruction. In case JITed code is larger than 512k, this renders literal pool register absolutely useless due to long displacement range restrictions. The solution is to use larl to make literal pool register point to the very beginning of the literal pool. This makes it always possible to address 512k worth of literal pool entries using long displacement. However, for short programs, in which the entire literal pool is covered by basr-generated base, it is still beneficial to use basr, since it is 4 bytes shorter than larl. Detect situations when basr-generated base does not cover the entire literal pool, and in such cases use larl instead. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191118180340.68373-4-iii@linux.ibm.com
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.