netdev - [PATCH net-next 1/2] net: filter: test fill/spill of all M[] regs

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Message-Id: <1401128255-6545-2-git-send-email-dborkman@redhat.com>
Date:	Mon, 26 May 2014 20:17:34 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	davem@...emloft.net
Cc:	ast@...mgrid.com, netdev@...r.kernel.org
Subject: [PATCH net-next 1/2] 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: Daniel Borkmann <dborkman@...hat.com>
---
 lib/test_bpf.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index af677cb..6be9119 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -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;
-- 
1.7.11.7

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