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| author |   Emese Revfy <re.emese@gmail.com> | 2016-06-20 20:42:34 +0200 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2016-10-10 14:51:45 -0700 |
| commit | 0766f788eb727e2e330d55d30545db65bcf2623f (patch) | |
| tree | 0436ae3b005558a4fb827459fe5c602037fe764a /include/linux/init.h | |
| parent | gcc-plugins: Add latent_entropy plugin (diff) | |
| download | linux-dev-0766f788eb727e2e330d55d30545db65bcf2623f.tar.xz linux-dev-0766f788eb727e2e330d55d30545db65bcf2623f.zip | |
latent_entropy: Mark functions with __latent_entropy
The __latent_entropy gcc attribute can be used only on functions and
variables. If it is on a function then the plugin will instrument it for
gathering control-flow entropy. If the attribute is on a variable then
the plugin will initialize it with random contents. The variable must
be an integer, an integer array type or a structure with integer fields.
These specific functions have been selected because they are init
functions (to help gather boot-time entropy), are called at unpredictable
times, or they have variable loops, each of which provide some level of
latent entropy.
Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: expanded commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/init.h')
| -rw-r--r-- | include/linux/init.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/init.h b/include/linux/init.h index 6935d02474aa..1e5c131d5c9a 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -39,7 +39,7 @@ /* These are for everybody (although not all archs will actually discard it in modules) */ -#define __init __section(.init.text) __cold notrace +#define __init __section(.init.text) __cold notrace __latent_entropy #define __initdata __section(.init.data) #define __initconst __constsection(.init.rodata) #define __exitdata __section(.exit.data) @@ -86,7 +86,8 @@ #define __exit __section(.exit.text) __exitused __cold notrace /* Used for MEMORY_HOTPLUG */ -#define __meminit __section(.meminit.text) __cold notrace +#define __meminit __section(.meminit.text) __cold notrace \ + __latent_entropy #define __meminitdata __section(.meminit.data) #define __meminitconst __constsection(.meminit.rodata) #define __memexit __section(.memexit.text) __exitused __cold notrace |