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Message-Id: <20190704085224.65223-1-iii@linux.ibm.com> Date: Thu, 4 Jul 2019 10:52:24 +0200 From: Ilya Leoshkevich <iii@...ux.ibm.com> To: bpf@...r.kernel.org, netdev@...r.kernel.org, ys114321@...il.com Cc: Ilya Leoshkevich <iii@...ux.ibm.com> Subject: [PATCH v2 bpf-next] selftests/bpf: fix "alu with different scalars 1" on s390 BPF_LDX_MEM is used to load the least significant byte of the retrieved test_val.index, however, on big-endian machines it ends up retrieving the most significant byte. Use the correct least significant byte offset on big-endian machines. Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com> --- v1->v2: - use __BYTE_ORDER instead of __BYTE_ORDER__. tools/testing/selftests/bpf/verifier/value_ptr_arith.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/bpf/verifier/value_ptr_arith.c b/tools/testing/selftests/bpf/verifier/value_ptr_arith.c index c3de1a2c9dc5..e5940c4e8b8f 100644 --- a/tools/testing/selftests/bpf/verifier/value_ptr_arith.c +++ b/tools/testing/selftests/bpf/verifier/value_ptr_arith.c @@ -183,7 +183,11 @@ BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), +#if __BYTE_ORDER == __LITTLE_ENDIAN BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), +#else + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, sizeof(int) - 1), +#endif BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3), BPF_MOV64_IMM(BPF_REG_2, 0), BPF_MOV64_IMM(BPF_REG_3, 0x100000), -- 2.21.0
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