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authorJohan Almbladh <johan.almbladh@anyfinetworks.com>2021-08-09 11:18:26 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2021-08-10 11:33:25 +0200
commit53e33f9928cd61272e8e7902a876cb8cdf3f5c07 (patch)
tree09145d782e1240852028d954d5c3b5a52712b540 /lib/test_bpf.c
parent66e5eb8474554bc021e8a221c336bdaef13f7a69 (diff)
bpf, tests: Add test for 32-bit context pointer argument passing
On a 32-bit architecture, the context pointer will occupy the low half of R1, and the other half will be zero. Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210809091829.810076-12-johan.almbladh@anyfinetworks.com
Diffstat (limited to 'lib/test_bpf.c')
-rw-r--r--lib/test_bpf.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 896d37f4f4b3..fcfaf45ae58a 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -2092,6 +2092,22 @@ static struct bpf_test tests[] = {
#undef NUMER
#undef DENOM
},
+#ifdef CONFIG_32BIT
+ {
+ "INT: 32-bit context pointer word order and zero-extension",
+ .u.insns_int = {
+ BPF_ALU32_IMM(BPF_MOV, R0, 0),
+ BPF_JMP32_IMM(BPF_JEQ, R1, 0, 3),
+ BPF_ALU64_IMM(BPF_RSH, R1, 32),
+ BPF_JMP32_IMM(BPF_JNE, R1, 0, 1),
+ BPF_ALU32_IMM(BPF_MOV, R0, 1),
+ BPF_EXIT_INSN(),
+ },
+ INTERNAL,
+ { },
+ { { 0, 1 } }
+ },
+#endif
{
"check: missing ret",
.u.insns = {