Commit 79dbabc1 authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add unit tests for new bswap insns 



Add unit tests for bswap insns.

Signed-off-by: default avatarYonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011314.3720109-1-yonghong.song@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent f02ec3ff

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

+2 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include "verifier_bounds_deduction_non_const.skel.h"

#include "verifier_bounds_mix_sign_unsign.skel.h"

#include "verifier_bpf_get_stack.skel.h"

#include "verifier_bswap.skel.h"

#include "verifier_btf_ctx_access.skel.h"

#include "verifier_cfg.skel.h"

#include "verifier_cgroup_inv_retcode.skel.h"
@@ -115,6 +116,7 @@ void test_verifier_bounds_deduction(void) { RUN(verifier_bounds_deduction); 
void test_verifier_bounds_deduction_non_const(void)     { RUN(verifier_bounds_deduction_non_const); }

void test_verifier_bounds_mix_sign_unsign(void) { RUN(verifier_bounds_mix_sign_unsign); }

void test_verifier_bpf_get_stack(void)        { RUN(verifier_bpf_get_stack); }

void test_verifier_bswap(void)                { RUN(verifier_bswap); }

void test_verifier_btf_ctx_access(void)       { RUN(verifier_btf_ctx_access); }

void test_verifier_cfg(void)                  { RUN(verifier_cfg); }

void test_verifier_cgroup_inv_retcode(void)   { RUN(verifier_cgroup_inv_retcode); }

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

0 → 100644
+59 −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("BSWAP, 16")

__success __success_unpriv __retval(0x23ff)

__naked void bswap_16(void)

{

	asm volatile ("					\

	r0 = 0xff23;					\

	r0 = bswap16 r0;				\

	exit;						\

"	::: __clobber_all);

}



SEC("socket")

__description("BSWAP, 32")

__success __success_unpriv __retval(0x23ff0000)

__naked void bswap_32(void)

{

	asm volatile ("					\

	r0 = 0xff23;					\

	r0 = bswap32 r0;				\

	exit;						\

"	::: __clobber_all);

}



SEC("socket")

__description("BSWAP, 64")

__success __success_unpriv __retval(0x34ff12ff)

__naked void bswap_64(void)

{

	asm volatile ("					\

	r0 = %[u64_val] ll;					\

	r0 = bswap64 r0;				\

	exit;						\

"	:

	: [u64_val]"i"(0xff12ff34ff56ff78ull)

	: __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";