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  1. 22 Jul, 2016 1 commit
    • Luis R. Rodriguez's avatar
      scripts: add Linux .cocciconfig for coccinelle · dd951fc1
      Luis R. Rodriguez authored 
      Coccinelle supports reading .cocciconfig, the order of precedence for
variables for .cocciconfig is as follows:

 o Your current user's home directory is processed first
 o Your directory from which spatch is called is processed next
 o The directory provided with the --dir option is processed last, if used

Since coccicheck runs through make, it naturally runs from the kernel
proper dir, as such the second rule above would be implied for picking up a
.cocciconfig when using 'make coccicheck'.

'make coccicheck' also supports using M= targets.If you do not supply
any M= target, it is assumed you want to target the entire kernel.
The kernel coccicheck script has:

    if [ "$KBUILD_EXTMOD" = "" ] ; then
        OPTIONS="--dir $srctree $COCCIINCLUDE"
    else
        OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
    fi

KBUILD_EXTMOD is set when an explicit target with M= is used. For both cases
the spatch --dir argument is used, as such third rule applies when
...
      dd951fc1
  3. 07 Jun, 2016 1 commit
    • Emese Revfy's avatar
      GCC plugin infrastructure · 6b90bd4b
      Emese Revfy authored 
      This patch allows to build the whole kernel with GCC plugins. It was ported from
grsecurity/PaX. The infrastructure supports building out-of-tree modules and
building in a separate directory. Cross-compilation is supported too.
Currently the x86, arm, arm64 and uml architectures enable plugins.

The directory of the gcc plugins is scripts/gcc-plugins. You can use a file or a directory
there. The plugins compile with these options:
 * -fno-rtti: gcc is compiled with this option so the plugins must use it too
 * -fno-exceptions: this is inherited from gcc too
 * -fasynchronous-unwind-tables: this is inherited from gcc too
 * -ggdb: it is useful for debugging a plugin (better backtrace on internal
    errors)
 * -Wno-narrowing: to suppress warnings from gcc headers (ipa-utils.h)
 * -Wno-unused-variable: to suppress warnings from gcc headers (gcc_version
    variable, plugin-version.h)

The infrastructure introduces a new Makefile target called gcc-plugins. It
supports all gcc versio...
      6b90bd4b
  5. 28 Apr, 2016 1 commit
  7. 28 Aug, 2015 1 commit
  9. 07 Aug, 2015 1 commit
    • David Woodhouse's avatar
      modsign: Use single PEM file for autogenerated key · fb117949
      David Woodhouse authored 
      
The current rule for generating signing_key.priv and signing_key.x509 is
a classic example of a bad rule which has a tendency to break parallel
make. When invoked to create *either* target, it generates the other
target as a side-effect that make didn't predict.

So let's switch to using a single file signing_key.pem which contains
both key and certificate. That matches what we do in the case of an
external key specified by CONFIG_MODULE_SIG_KEY anyway, so it's also
slightly cleaner.
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      fb117949
  11. 15 Jun, 2015 2 commits
  13. 17 Apr, 2015 1 commit
  15. 17 Feb, 2015 1 commit
  17. 13 Feb, 2015 1 commit
  19. 27 Nov, 2014 1 commit
  21. 25 Nov, 2014 1 commit
  23. 27 Oct, 2014 1 commit
  25. 30 Jul, 2014 1 commit
    • Andi Kleen's avatar
      kbuild: Support split debug info v4 · 866ced95
      Andi Kleen authored 
      This is an alternative approach to lower the overhead of debug info
(as we discussed a few days ago)

gcc 4.7+ and newer binutils have a new "split debug info" debug info
model where the debug info is only written once into central ".dwo" files.

This avoids having to copy it around multiple times, from the object
files to the final executable. It lowers the disk space
requirements. In addition it defaults to compressed debug data.

More details here: http://gcc.gnu.org/wiki/DebugFission

This patch adds a new option to enable it. It has to be an option,
because it'll undoubtedly break everyone's debuginfo packaging scheme.
gdb/objdump/etc. all still work, if you have new enough versions.

I don't see big compile wins (maybe a second or two faster or so), but the
object dirs with debuginfo get significantly smaller. My standard kernel
config (slightly bigger than defconfig) shrinks from 2.9G disk space
to 1.1G objdir (with non reduced debuginfo). I presume if you are IO...
      866ced95
  27. 16 Apr, 2014 1 commit
  29. 11 Feb, 2014 1 commit
  31. 31 Jul, 2013 1 commit
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  37. 10 Oct, 2012 1 commit
  39. 01 Jul, 2011 1 commit
  41. 28 Apr, 2011 1 commit
    • Sam Ravnborg's avatar
      kbuild: asm-generic support · d8ecc5cd
      Sam Ravnborg authored 
      There is an increasing amount of header files
shared between individual architectures in asm-generic.
To avoid a lot of dummy wrapper files that just
include the corresponding file in asm-generic provide
some basic support in kbuild for this.

With the following patch an architecture can maintain
a list of files in the file arch/$(ARCH)/include/asm/Kbuild

To use a generic file just add:

        generic-y += <name-of-header-file.h>

For each file listed kbuild will generate the necessary
wrapper in arch/$(ARCH)/include/generated/asm.

When installing userspace headers a wrapper is likewise created.

The original inspiration for this came from the unicore32
patchset - although a different method is used.

The patch includes several improvements from Arnd Bergmann.
Michael Marek contributed Makefile.asm-generic.

Remis Baima did an intial implementation along to achive
the same - see https://patchwork.kernel.org/patch/13352/

Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
Acked-...
      d8ecc5cd
  43. 22 Feb, 2011 1 commit
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  63. 09 Jun, 2009 1 commit
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