Commit 613dad49 authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add unit tests for new gotol insn 



Add unit tests for gotol insn.

Signed-off-by: default avatarYonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011329.3721881-1-yonghong.song@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent de1c2680

tools/testing/selftests/bpf/prog_tests/verifier.c

+2 −0
Original line number Diff line number Diff line
@@ -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); }

tools/testing/selftests/bpf/progs/verifier_gotol.c

0 → 100644
+44 −0
Original line number Diff line number Diff line 
// 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";