lib/test_bpf: Add additional BPF_ADD tests

Some of these tests proved useful with the powerpc eBPF JIT port due to
sign-extended 16-bit immediate loads. Though some of these aspects get
covered in other tests, it is better to have explicit tests so as to
quickly tag the precise problem.

Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 128 insertions, 0 deletions

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 2fb31aa89b9d..8f22fbedc3a6 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -2566,6 +2566,70 @@ static struct bpf_test tests[] = {
                 { { 0, 0x1 } },
         },
         {
+                "ALU_ADD_K: 0 + 0xffff = 0xffff",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0xffff),
+                        BPF_ALU32_IMM(BPF_ADD, R2, 0xffff),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU_ADD_K: 0 + 0x7fffffff = 0x7fffffff",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0x7fffffff),
+                        BPF_ALU32_IMM(BPF_ADD, R2, 0x7fffffff),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU_ADD_K: 0 + 0x80000000 = 0x80000000",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0x80000000),
+                        BPF_ALU32_IMM(BPF_ADD, R2, 0x80000000),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU_ADD_K: 0 + 0x80008000 = 0x80008000",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0x80008000),
+                        BPF_ALU32_IMM(BPF_ADD, R2, 0x80008000),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
                 "ALU64_ADD_K: 1 + 2 = 3",
                 .u.insns_int = {
                         BPF_LD_IMM64(R0, 1),
@@ -2657,6 +2721,70 @@ static struct bpf_test tests[] = {
                 { },
                 { { 0, 0x1 } },
         },
+        {
+                "ALU64_ADD_K: 0 + 0xffff = 0xffff",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0xffff),
+                        BPF_ALU64_IMM(BPF_ADD, R2, 0xffff),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU64_ADD_K: 0 + 0x7fffffff = 0x7fffffff",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0x7fffffff),
+                        BPF_ALU64_IMM(BPF_ADD, R2, 0x7fffffff),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU64_ADD_K: 0 + 0x80000000 = 0xffffffff80000000",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0xffffffff80000000LL),
+                        BPF_ALU64_IMM(BPF_ADD, R2, 0x80000000),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
+        {
+                "ALU_ADD_K: 0 + 0x80008000 = 0xffffffff80008000",
+                .u.insns_int = {
+                        BPF_LD_IMM64(R2, 0x0),
+                        BPF_LD_IMM64(R3, 0xffffffff80008000LL),
+                        BPF_ALU64_IMM(BPF_ADD, R2, 0x80008000),
+                        BPF_JMP_REG(BPF_JEQ, R2, R3, 2),
+                        BPF_MOV32_IMM(R0, 2),
+                        BPF_EXIT_INSN(),
+                        BPF_MOV32_IMM(R0, 1),
+                        BPF_EXIT_INSN(),
+                },
+                INTERNAL,
+                { },
+                { { 0, 0x1 } },
+        },
         /* BPF_ALU | BPF_SUB | BPF_X */
         {
                 "ALU_SUB_X: 3 - 1 = 2",