Difference between revisions of "SystemTap"

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(Prepare)
(linux-3.3.8)
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You can run {{ic|sudo abs; cp -r /var/abs/core/linux .}} to get the original kernel build files.
 
You can run {{ic|sudo abs; cp -r /var/abs/core/linux .}} to get the original kernel build files.
  
 +
===modify config===
 
Edit '''config''' (for 32-bit systems) or '''config.x86_64''' (for 64-bit systems), turn on these options:
 
Edit '''config''' (for 32-bit systems) or '''config.x86_64''' (for 64-bit systems), turn on these options:
 
* CONFIG_DEBUG_INFO=y
 
* CONFIG_DEBUG_INFO=y
Line 21: Line 22:
 
By default only ''CONFIG_DEBUG_INFO'' and ''CONFIG_KPROBES'' are not set.
 
By default only ''CONFIG_DEBUG_INFO'' and ''CONFIG_KPROBES'' are not set.
  
Once modifying '''config.x86_64''', save and close it.
+
With current core/linux (3.3.8) you can simply do this:
Run {{ic|md5sum config.x86_64}} to get a new md5sum.
+
{{hc|i686|<nowiki>
 +
echo "CONFIG_DEBUG_INFO=y" >> config
 +
echo "CONFIG_KPROBES=y" >> config
 +
</nowiki>}}
 +
{{hc|x86_64|<nowiki>
 +
echo "CONFIG_DEBUG_INFO=y" >> config.x86_64
 +
echo "CONFIG_KPROBES=y" >> config.x86_64
 +
</nowiki>}}
 +
 
 +
===update checksum===
 +
Run {{ic|md5sum config[.x86_64]}} to get a new md5sum.
  
 
In '''PKGBUILD''' file, the {{ic|<nowiki>md5sums=('sum-of-first' ... 'sum-of-last')</nowiki>}} has the same order with
 
In '''PKGBUILD''' file, the {{ic|<nowiki>md5sums=('sum-of-first' ... 'sum-of-last')</nowiki>}} has the same order with

Revision as of 04:33, 9 June 2012

This subsection contains articles on how to compile/modify/boot the Arch Linux kernels.

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Systemtap provides free software (GPL) infrastructure to simplify the gathering of information about the running Linux system.

Easy and fast

Officially, it is recommended to build a linux-custom package to run systemtap, but rebuilding the original linux package can be very easy and efficient.

Prepare

You can run sudo abs; cp -r /var/abs/core/linux . to get the original kernel build files.

modify config

Edit config (for 32-bit systems) or config.x86_64 (for 64-bit systems), turn on these options:

  • CONFIG_DEBUG_INFO=y
  • CONFIG_KPROBES=y
  • CONFIG_RELAY=y
  • CONFIG_DEBUG_FS=y
  • CONFIG_MODULES=y
  • CONFIG_MODULE_UNLOAD=y
  • CONFIG_UTRACE=y

By default only CONFIG_DEBUG_INFO and CONFIG_KPROBES are not set.

With current core/linux (3.3.8) you can simply do this:

i686
echo "CONFIG_DEBUG_INFO=y" >> config
echo "CONFIG_KPROBES=y" >> config
x86_64
echo "CONFIG_DEBUG_INFO=y" >> config.x86_64
echo "CONFIG_KPROBES=y" >> config.x86_64

update checksum

Run md5sum config[.x86_64] to get a new md5sum.

In PKGBUILD file, the md5sums=('sum-of-first' ... 'sum-of-last') has the same order with source=('first-source' ... 'last-source'), put your new md5sum in the right place.

Build and Install

Optional: you can set MAKEFLAGS="-j16" in /etc/makepkg.conf to speed up the compilation.

Run makepkg to compile, then simply sudo pacman -U *.pkg.tar.gz to install the packages. pacman will tell you reinstall, That's great!

linux and linux-headers should be reinstalled, linux-docs does not matter.

Via this method, external modules (e.g. nvidia and virtualbox) don't need to be rebuilt.

Systemtap

Simply install systemtap from AUR: systemtapAUR, all done.

Build custom kernel

Please reference this README