diff options
| author |   Will Drewry <wad@chromium.org> | 2012-04-18 19:50:25 -0500 |
|---|---|---|
| committer |   James Morris <james.l.morris@oracle.com> | 2012-04-19 13:44:06 +1000 |
| commit | 561381a146a31ff91d7a2370c10871b02ac7343c (patch) | |
| tree | e98955e4b362fd25fd8f11603804ecb74c7f4208 /samples/seccomp/bpf-direct.c | |
| parent | Yama: add additional ptrace scopes (diff) | |
| download | wireguard-linux-561381a146a31ff91d7a2370c10871b02ac7343c.tar.xz wireguard-linux-561381a146a31ff91d7a2370c10871b02ac7343c.zip | |
samples/seccomp: fix dependencies on arch macros
This change fixes the compilation error triggered here for
i386 allmodconfig in linux-next:
http://kisskb.ellerman.id.au/kisskb/buildresult/6123842/
Logic attempting to predict the host architecture has been
removed from the Makefile. Instead, the bpf-direct sample
should now compile on any architecture, but if the architecture
is not supported, it will compile a minimal main() function.
This change also ensures the samples are not compiled when
there is no seccomp filter support.
(Note, I wasn't able to reproduce the error locally, but
the existing approach was clearly flawed. This tweak
should resolve your issue and avoid other future weirdness.)
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Drewry <wad@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'samples/seccomp/bpf-direct.c')
| -rw-r--r-- | samples/seccomp/bpf-direct.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/samples/seccomp/bpf-direct.c b/samples/seccomp/bpf-direct.c index 26f523e6ed74..151ec3f52189 100644 --- a/samples/seccomp/bpf-direct.c +++ b/samples/seccomp/bpf-direct.c @@ -8,6 +8,11 @@ * and can serve as a starting point for developing * applications using prctl(PR_SET_SECCOMP, 2, ...). */ +#if defined(__i386__) || defined(__x86_64__) +#define SUPPORTED_ARCH 1 +#endif + +#if defined(SUPPORTED_ARCH) #define __USE_GNU 1 #define _GNU_SOURCE 1 @@ -43,8 +48,6 @@ #define REG_ARG3 REG_R10 #define REG_ARG4 REG_R8 #define REG_ARG5 REG_R9 -#else -#error Unsupported platform #endif #ifndef PR_SET_NO_NEW_PRIVS @@ -174,3 +177,14 @@ int main(int argc, char **argv) payload("Error message going to STDERR\n")); return 0; } +#else /* SUPPORTED_ARCH */ +/* + * This sample is x86-only. Since kernel samples are compiled with the + * host toolchain, a non-x86 host will result in using only the main() + * below. + */ +int main(void) +{ + return 1; +} +#endif /* SUPPORTED_ARCH */ |