Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 791caeb0 authored by David Daney's avatar David Daney Committed by David S. Miller
Browse files

test_bpf: Add a couple of tests for BPF_JSGE. 



Some JITs can optimize comparisons with zero.  Add a couple of
BPF_JSGE tests against immediate zero.

Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ae08ea97

lib/test_bpf.c

+38 −0
Original line number Diff line number Diff line
@@ -4504,6 +4504,44 @@ static struct bpf_test tests[] = { 
		{ },

		{ { 0, 1 } },

	},

	{

		"JMP_JSGE_K: Signed jump: value walk 1",

		.u.insns_int = {

			BPF_ALU32_IMM(BPF_MOV, R0, 0),

			BPF_LD_IMM64(R1, -3),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 6),

			BPF_ALU64_IMM(BPF_ADD, R1, 1),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 4),

			BPF_ALU64_IMM(BPF_ADD, R1, 1),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 2),

			BPF_ALU64_IMM(BPF_ADD, R1, 1),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 1),

			BPF_EXIT_INSN(),		/* bad exit */

			BPF_ALU32_IMM(BPF_MOV, R0, 1),	/* good exit */

			BPF_EXIT_INSN(),

		},

		INTERNAL,

		{ },

		{ { 0, 1 } },

	},

	{

		"JMP_JSGE_K: Signed jump: value walk 2",

		.u.insns_int = {

			BPF_ALU32_IMM(BPF_MOV, R0, 0),

			BPF_LD_IMM64(R1, -3),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 4),

			BPF_ALU64_IMM(BPF_ADD, R1, 2),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 2),

			BPF_ALU64_IMM(BPF_ADD, R1, 2),

			BPF_JMP_IMM(BPF_JSGE, R1, 0, 1),

			BPF_EXIT_INSN(),		/* bad exit */

			BPF_ALU32_IMM(BPF_MOV, R0, 1),	/* good exit */

			BPF_EXIT_INSN(),

		},

		INTERNAL,

		{ },

		{ { 0, 1 } },

	},

	/* BPF_JMP | BPF_JGT | BPF_K */

	{

		"JMP_JGT_K: if (3 > 2) return 1",