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@xxxxxxxxxxxxxxxxx>
---
lib/test_bpf.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 1115e39630ce..8b94902702ed 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -5417,6 +5417,42 @@ 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",
--
2.25.1
