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lib/test_bpf: Add additional BPF_ADD tests

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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>
This commit is contained in:
Naveen N. Rao 2016-04-05 15:32:56 +05:30 committed by David S. Miller
parent b64b50eac4
commit 9c94f6c8e0
1 changed files with 128 additions and 0 deletions
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128
lib/test_bpf.c
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@ -2565,6 +2565,70 @@ 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 = {
@ -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",