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selftests/bpf: verifier/xdp.c converted to inline assembly

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Test verifier/xdp.c automatically converted to use inline assembly.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230325025524.144043-43-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman 2023-03-25 04:55:23 +02:00 committed by Alexei Starovoitov
parent a8036aea2d
commit ffb515c933
3 changed files with 26 additions and 14 deletions
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2
tools/testing/selftests/bpf/prog_tests/verifier.c
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@ -39,6 +39,7 @@
#include "verifier_value_or_null.skel.h"
#include "verifier_var_off.skel.h"
#include "verifier_xadd.skel.h"
#include "verifier_xdp.skel.h"
__maybe_unused
static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
@ -100,3 +101,4 @@ void test_verifier_value(void) { RUN(verifier_value); }
void test_verifier_value_or_null(void) { RUN(verifier_value_or_null); }
void test_verifier_var_off(void) { RUN(verifier_var_off); }
void test_verifier_xadd(void) { RUN(verifier_xadd); }
void test_verifier_xdp(void) { RUN(verifier_xdp); }

24
tools/testing/selftests/bpf/progs/verifier_xdp.c Normal file
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@ -0,0 +1,24 @@
// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/xdp.c */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
SEC("xdp")
__description("XDP, using ifindex from netdev")
__success __retval(1)
__naked void xdp_using_ifindex_from_netdev(void)
{
asm volatile (" \
r0 = 0; \
r2 = *(u32*)(r1 + %[xdp_md_ingress_ifindex]); \
if r2 < 1 goto l0_%=; \
r0 = 1; \
l0_%=: exit; \
" :
: __imm_const(xdp_md_ingress_ifindex, offsetof(struct xdp_md, ingress_ifindex))
: __clobber_all);
}
char _license[] SEC("license") = "GPL";

14
tools/testing/selftests/bpf/verifier/xdp.c
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@ -1,14 +0,0 @@
{
"XDP, using ifindex from netdev",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct xdp_md, ingress_ifindex)),
BPF_JMP_IMM(BPF_JLT, BPF_REG_2, 1, 1),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_XDP,
.retval = 1,
},