> For the complete documentation index, see [llms.txt](https://richardweiyang-2.gitbook.io/systemtap_with_examples/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://richardweiyang-2.gitbook.io/systemtap_with_examples/installation/installation_build_ubuntu.md). # Build package from source As a kernel dev, I would build and install kernel from source. After doing so, we need to reinstall linux-header and linux-image for systemtap to work with the correct kernel version. This is a kind of struggling to me again. The step I found is a little tricky. Maybe there is a better way, while I just managed to do this in the following steps. If you have a better way, I'd appreciate it a lot. The general idea is get from kernel make target **deb-pkg** and the document in [Ubuntu wiki -- Systemtap](https://wiki.ubuntu.com/Kernel/Systemtap#Where_to_get_debug_symbols_for_kernel_X.3F). I am curious about why the **deb-pkg** target doesn't work as it should. And the first steps in [Ubuntu wiki -- Systemtap](https://wiki.ubuntu.com/Kernel/Systemtap#Where_to_get_debug_symbols_for_kernel_X.3F) doesn't function on my machine. Maybe I missed some critical steps in both parts. The good news is I managed to combine the first part in **deb-pkg** and the last part in [Ubuntu wiki -- Systemtap](https://wiki.ubuntu.com/Kernel/Systemtap#Where_to_get_debug_symbols_for_kernel_X.3F), and finally get the package I need. ## Kernel Build Tip To use systemtap with kernel, you need to make sure kernel built with following configurations. * CONFIG\_DEBUG\_INFO=y * CONFIG\_DEBUG\_INFO\_REDUCED=n * CONFIG\_KPROBES=y * CONFIG\_RELAY=y * CONFIG\_DEBUG\_FS=y * CONFIG\_MODULES=y * CONFIG\_MODULE\_UNLOAD=y And one more tip not recorded in document -- a modification in Makefile. If not modified, some functions will not get proper context variables. ``` diff --git a/Makefile b/Makefile index c13f8b85ba60..40c984c60280 100644 --- a/Makefile +++ b/Makefile @@ -731,7 +731,7 @@ KBUILD_CFLAGS += -fomit-frame-pointer endif endif -KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) +KBUILD_CFLAGS += $(call cc-option, -fvar-tracking-assignments) ifdef CONFIG_DEBUG_INFO ifdef CONFIG_DEBUG_INFO_SPLIT ``` ## Create Rules The first step is to run ``` make deb-pkg ``` in kernel source directory. I named this "create rules", since this creates config files in debian directory. Before running **make deb-pkg**, we need to make some modification as below. ``` diff --git a/scripts/package/Makefile b/scripts/package/Makefile index 73503ebce632..a1117548120e 100644 --- a/scripts/package/Makefile +++ b/scripts/package/Makefile @@ -68,12 +68,12 @@ binrpm-pkg: FORCE clean-files += $(objtree)/*.spec deb-pkg: FORCE - $(MAKE) clean + #$(MAKE) clean $(CONFIG_SHELL) $(srctree)/scripts/package/mkdebian $(call cmd,src_tar,$(KDEB_SOURCENAME)) origversion=$$(dpkg-parsechangelog -SVersion |sed 's/-[^-]*$$//');\ mv $(KDEB_SOURCENAME).tar.gz ../$(KDEB_SOURCENAME)_$${origversion}.orig.tar.gz - +dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) -i.git -us -uc + #+dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) -i.git -us -uc bindeb-pkg: FORCE $(CONFIG_SHELL) $(srctree)/scripts/package/mkdebian diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian index 663a7f343b42..40ec6caabc2c 100755 --- a/scripts/package/mkdebian +++ b/scripts/package/mkdebian @@ -212,7 +212,6 @@ binary-arch: clean: rm -rf debian/*tmp debian/files - \$(MAKE) clean binary: binary-arch EOF ``` Here is the reason for those changes. You could skip it if you don't want to know the detail now. * First we comment out "make clean" to forbid rebuild the kernel again. As you know, each time to rebuild the whole kernel will take a huge amount of time. * Second we comment out the "dpkg-buildpackage" command. I didn't manage to run this command. * Third we remote the "make clean" in debian/rules. Since in next step, the command will first call the clean rule and then rebuild. If you don't want to waste too much time, remove it. ## Create Package After the previous step, we may get debian directory in kernel source code and a tar file of the source tree. Now it is time to run the following command to get the package we want. ``` AUTOBUILD=1 fakeroot debian/rules binary-arch skipdbg=false ``` Those packages are in parent directory. Enjoy and have fun! --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://richardweiyang-2.gitbook.io/systemtap_with_examples/installation/installation_build_ubuntu.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.