From: Jon Medhurst <tixy@yxit.co.uk>
Date: Tue, 26 Apr 2011 14:15:56 +0000 (+0100)
Subject: ARM: kprobes: Infrastructure for table driven decoding of CPU instructions
X-Git-Tag: v3.1-rc1~258^2^2~2^2~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d1a095aa1e6e2a233bfb1729e15233e77f69d54;p=pandora-kernel.git

ARM: kprobes: Infrastructure for table driven decoding of CPU instructions

The existing ARM instruction decoding functions are a mass of if/else
code. Rather than follow this pattern for Thumb instruction decoding
this patch implements an infrastructure for a new table driven scheme.

This has several advantages:

- Reduces the kernel size by approx 2kB. (The ARM instruction decoding
  will eventually have -3.1kB code, +1.3kB data; with similar or better
  estimated savings for Thumb decoding.)

- Allows programmatic checking of decoding consistency and test case
  coverage.

- Provides more uniform source code and is therefore, arguably, clearer.

For a detailed explanation of how decoding tables work see the in-source
documentation in kprobes.h, and also for kprobe_decode_insn().

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
---

Reading git-diff-tree failed