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selftests/bpf: Add unit tests for new bswap insns

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Add unit tests for bswap insns.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011314.3720109-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2023-07-27 18:13:14 -07:00 committed by Alexei Starovoitov
parent f02ec3ff3f
commit 79dbabc175
2 changed files with 61 additions and 0 deletions
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2
tools/testing/selftests/bpf/prog_tests/verifier.c
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@ -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); }

59
tools/testing/selftests/bpf/progs/verifier_bswap.c Normal file
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@ -0,0 +1,59 @@
// 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";