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case: # perf probe -x /lib/libc-2.28.9000.so memcpy # perf record -e probe_libc:memcpy -aR sleep 1 System hangup and cpu get in trap_c loop, because our hardware singlestep state could still get interrupt signal. When we get in uprobe_xol singlestep slot, we should disable irq in pt_regs->psr. And is_swbp_insn() need a csky arch implementation with a low 16bit mask. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Steven Rostedt (VMware) <rostedt@goodmis.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.