Commit 53e33f99 authored by Johan Almbladh's avatar Johan Almbladh Committed by Daniel Borkmann
Browse files

bpf, tests: Add test for 32-bit context pointer argument passing 



On a 32-bit architecture, the context pointer will occupy the low
half of R1, and the other half will be zero.

Signed-off-by: default avatarJohan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210809091829.810076-12-johan.almbladh@anyfinetworks.com
parent 66e5eb84

lib/test_bpf.c

+16 −0
Original line number Diff line number Diff line
@@ -2092,6 +2092,22 @@ static struct bpf_test tests[] = { 
#undef NUMER

#undef DENOM

	},

#ifdef CONFIG_32BIT

	{

		"INT: 32-bit context pointer word order and zero-extension",

		.u.insns_int = {

			BPF_ALU32_IMM(BPF_MOV, R0, 0),

			BPF_JMP32_IMM(BPF_JEQ, R1, 0, 3),

			BPF_ALU64_IMM(BPF_RSH, R1, 32),

			BPF_JMP32_IMM(BPF_JNE, R1, 0, 1),

			BPF_ALU32_IMM(BPF_MOV, R0, 1),

			BPF_EXIT_INSN(),

		},

		INTERNAL,

		{ },

		{ { 0, 1 } }

	},

#endif

	{

		"check: missing ret",

		.u.insns = {