lkml.org 
[lkml]   [2015]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 10/11] selftests/seccomp: Make seccomp tests work on big endian
Date
The seccomp_bpf test uses BPF_LD|BPF_W|BPF_ABS to load 32-bit values
from seccomp_data->args. On big endian machines this will load the high
word of the argument, which is not what the test wants.

Borrow a hack from samples/seccomp/bpf-helper.h which changes the offset
on big endian to account for this.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index c5abe7fd7590..2303a8dff9a2 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -82,7 +82,13 @@ struct seccomp_data {
};
#endif

+#if __BYTE_ORDER == __LITTLE_ENDIAN
#define syscall_arg(_n) (offsetof(struct seccomp_data, args[_n]))
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define syscall_arg(_n) (offsetof(struct seccomp_data, args[_n]) + sizeof(__u32))
+#else
+#error "wut? Unknown __BYTE_ORDER?!"
+#endif

#define SIBLING_EXIT_UNKILLED 0xbadbeef
#define SIBLING_EXIT_FAILURE 0xbadface
--
2.1.0


\
 
 \ /
  Last update: 2015-07-23 12:41    [W:0.101 / U:1.624 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site