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selftests/bpf: Enable test_bpf_syscall_macro: Syscall_arg1 on s390 and arm64

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Considering that CO-RE direct read access to the first system call
argument is already available on s390 and arm64, let's enable
test_bpf_syscall_macro:syscall_arg1 on these architectures.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240831041934.1629216-4-pulehui@huaweicloud.com
This commit is contained in:
Pu Lehui 2024-08-31 04:19:33 +00:00 • committed by Andrii Nakryiko
parent 9ab94078e8
commit 4a4c4c0d0a
2 changed files with 0 additions and 6 deletions
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4
tools/testing/selftests/bpf/prog_tests/test_bpf_syscall_macro.c
View file

@ -38,11 +38,7 @@ void test_bpf_syscall_macro(void)
/* check whether args of syscall are copied correctly */
prctl(exp_arg1, exp_arg2, exp_arg3, exp_arg4, exp_arg5);
#if defined(__aarch64__) || defined(__s390__)
ASSERT_NEQ(skel->bss->arg1, exp_arg1, "syscall_arg1");
#else
ASSERT_EQ(skel->bss->arg1, exp_arg1, "syscall_arg1");
#endif
ASSERT_EQ(skel->bss->arg2, exp_arg2, "syscall_arg2");
ASSERT_EQ(skel->bss->arg3, exp_arg3, "syscall_arg3");
/* it cannot copy arg4 when uses PT_REGS_PARM4 on x86_64 */

2
tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
View file

@ -43,9 +43,7 @@ int BPF_KPROBE(handle_sys_prctl)
/* test for PT_REGS_PARM */
#if !defined(bpf_target_arm64) && !defined(bpf_target_s390)
bpf_probe_read_kernel(&tmp, sizeof(tmp), &PT_REGS_PARM1_SYSCALL(real_regs));
#endif
arg1 = tmp;
bpf_probe_read_kernel(&arg2, sizeof(arg2), &PT_REGS_PARM2_SYSCALL(real_regs));
bpf_probe_read_kernel(&arg3, sizeof(arg3), &PT_REGS_PARM3_SYSCALL(real_regs));