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selftests/bpf: Add unit tests for new gotol insn

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Add unit tests for gotol insn.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011329.3721881-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2023-07-27 18:13:29 -07:00 committed by Alexei Starovoitov
parent de1c26809e
commit 613dad4980
2 changed files with 46 additions and 0 deletions
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2
tools/testing/selftests/bpf/prog_tests/verifier.c
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@ -25,6 +25,7 @@
#include "verifier_direct_stack_access_wraparound.skel.h"
#include "verifier_div0.skel.h"
#include "verifier_div_overflow.skel.h"
#include "verifier_gotol.skel.h"
#include "verifier_helper_access_var_len.skel.h"
#include "verifier_helper_packet_access.skel.h"
#include "verifier_helper_restricted.skel.h"
@ -131,6 +132,7 @@ void test_verifier_direct_packet_access(void) { RUN(verifier_direct_packet_acces
void test_verifier_direct_stack_access_wraparound(void) { RUN(verifier_direct_stack_access_wraparound); }
void test_verifier_div0(void) { RUN(verifier_div0); }
void test_verifier_div_overflow(void) { RUN(verifier_div_overflow); }
void test_verifier_gotol(void) { RUN(verifier_gotol); }
void test_verifier_helper_access_var_len(void) { RUN(verifier_helper_access_var_len); }
void test_verifier_helper_packet_access(void) { RUN(verifier_helper_packet_access); }
void test_verifier_helper_restricted(void) { RUN(verifier_helper_restricted); }

44
tools/testing/selftests/bpf/progs/verifier_gotol.c Normal file
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@ -0,0 +1,44 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
SEC("socket")
__description("gotol, small_imm")
__success __success_unpriv __retval(1)
__naked void gotol_small_imm(void)
{
asm volatile (" \
call %[bpf_ktime_get_ns]; \
if r0 == 0 goto l0_%=; \
gotol l1_%=; \
l2_%=: \
gotol l3_%=; \
l1_%=: \
r0 = 1; \
gotol l2_%=; \
l0_%=: \
r0 = 2; \
l3_%=: \
exit; \
" :
: __imm(bpf_ktime_get_ns)
: __clobber_all);
}
#else
SEC("socket")
__description("cpuv4 is not supported by compiler or jit, use a dummy test")
__success
int dummy_test(void)
{
return 0;
}
#endif
char _license[] SEC("license") = "GPL";