Commit 108cc22a authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

net: filter: test fill/spill of all M[] regs 



This test for classic BPF probes stores and load combination
via X on all 16 registers of the scratch memory store. It
initially loads integer 100 and passes this value around
to each register while incrementing it every time, thus we
expect to have 116 as a result. Might be useful for JIT
testing.

Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c4438f03

lib/test_bpf.c

+90 −0
Original line number Diff line number Diff line
@@ -1485,6 +1485,96 @@ static struct bpf_test tests[] = { 
		{ },

		{ },

	},

	{	/* Mainly checking JIT here. */

		"M[]: STX + LDX",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 100),

			BPF_STMT(BPF_STX, 0),

			BPF_STMT(BPF_LDX | BPF_MEM, 0),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 1),

			BPF_STMT(BPF_LDX | BPF_MEM, 1),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 2),

			BPF_STMT(BPF_LDX | BPF_MEM, 2),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 3),

			BPF_STMT(BPF_LDX | BPF_MEM, 3),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 4),

			BPF_STMT(BPF_LDX | BPF_MEM, 4),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 5),

			BPF_STMT(BPF_LDX | BPF_MEM, 5),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 6),

			BPF_STMT(BPF_LDX | BPF_MEM, 6),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 7),

			BPF_STMT(BPF_LDX | BPF_MEM, 7),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 8),

			BPF_STMT(BPF_LDX | BPF_MEM, 8),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 9),

			BPF_STMT(BPF_LDX | BPF_MEM, 9),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 10),

			BPF_STMT(BPF_LDX | BPF_MEM, 10),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 11),

			BPF_STMT(BPF_LDX | BPF_MEM, 11),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 12),

			BPF_STMT(BPF_LDX | BPF_MEM, 12),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 13),

			BPF_STMT(BPF_LDX | BPF_MEM, 13),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 14),

			BPF_STMT(BPF_LDX | BPF_MEM, 14),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_STX, 15),

			BPF_STMT(BPF_LDX | BPF_MEM, 15),

			BPF_STMT(BPF_MISC | BPF_TXA, 0),

			BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 1),

			BPF_STMT(BPF_MISC | BPF_TAX, 0),

			BPF_STMT(BPF_RET | BPF_A, 0),

		},

		CLASSIC | FLAG_NO_DATA,

		{ },

		{ { 0, 116 } },

	},

};



static struct net_device dev;

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