c8b3446170
The perf call-graph option can trace the callchain between functions. This commit add the perf callchain for nds32. There are kerenl callchain and user callchain. The kerenl callchain can trace the function in kernel space. There are two type for user callchain. One for the 'optimize for size' config is set, and another one for the config is not set. The difference between two types is that the index of frame-pointer in user stack is not the same. For example: With optimize for size: User Stack: --------- | lp | --------- | gp | --------- | fp | Without optimize for size: User Stack: 1. non-leaf function: --------- | lp | --------- | fp | 2. leaf function: --------- | fp | Signed-off-by: Nickhu <nickhu@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.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.