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| author | Johan Almbladh <johan.almbladh@anyfinetworks.com> | 2021-08-09 11:18:24 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-08-10 11:33:18 +0200 |
| commit | e5009b4636cb593c06243197fd0742ed2e6ac510 (patch) | |
| tree | 9df3bcc0e85d3306af2698be21436744c9c36758 /lib/test_bpf.c | |
| parent | 84024a4e86d9b2085f3444190b30d5f88c76e07b (diff) | |
| download | lwn-e5009b4636cb593c06243197fd0742ed2e6ac510.tar.gz lwn-e5009b4636cb593c06243197fd0742ed2e6ac510.zip | |
bpf, tests: Add word-order tests for load/store of double words
A double word (64-bit) load/store may be implemented as two successive
32-bit operations, one for each word. Check that the order of those
operations is consistent with the machine endianness.
Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210809091829.810076-10-johan.almbladh@anyfinetworks.com
Diffstat (limited to 'lib/test_bpf.c')
| -rw-r--r-- | lib/test_bpf.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index e3c256963020..402c199cc119 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -5420,6 +5420,42 @@ static struct bpf_test tests[] = { { { 0, 0xffffffff } }, .stack_depth = 40, }, + { + "STX_MEM_DW: Store double word: first word in memory", + .u.insns_int = { + BPF_LD_IMM64(R0, 0), + BPF_LD_IMM64(R1, 0x0123456789abcdefLL), + BPF_STX_MEM(BPF_DW, R10, R1, -40), + BPF_LDX_MEM(BPF_W, R0, R10, -40), + BPF_EXIT_INSN(), + }, + INTERNAL, + { }, +#ifdef __BIG_ENDIAN + { { 0, 0x01234567 } }, +#else + { { 0, 0x89abcdef } }, +#endif + .stack_depth = 40, + }, + { + "STX_MEM_DW: Store double word: second word in memory", + .u.insns_int = { + BPF_LD_IMM64(R0, 0), + BPF_LD_IMM64(R1, 0x0123456789abcdefLL), + BPF_STX_MEM(BPF_DW, R10, R1, -40), + BPF_LDX_MEM(BPF_W, R0, R10, -36), + BPF_EXIT_INSN(), + }, + INTERNAL, + { }, +#ifdef __BIG_ENDIAN + { { 0, 0x89abcdef } }, +#else + { { 0, 0x01234567 } }, +#endif + .stack_depth = 40, + }, /* BPF_STX | BPF_ATOMIC | BPF_W/DW */ { "STX_XADD_W: Test: 0x12 + 0x10 = 0x22", |