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Commit 9c94f6c8 authored by Naveen N. Rao's avatar Naveen N. Rao Committed by David S. Miller
Browse files

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: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b64b50ea

lib/test_bpf.c

+128 −0
Original line number Diff line number Diff line
@@ -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",