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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
#include "test_progs.h"
#include "read_vsyscall.skel.h"
#if defined(__x86_64__)
/* For VSYSCALL_ADDR */
#include <asm/vsyscall.h>
#else
/* To prevent build failure on non-x86 arch */
#define VSYSCALL_ADDR 0UL
#endif
struct read_ret_desc {
const char *name;
int ret;
} all_read[] = {
{ .name = "probe_read_kernel", .ret = -ERANGE },
{ .name = "probe_read_kernel_str", .ret = -ERANGE },
{ .name = "probe_read", .ret = -ERANGE },
{ .name = "probe_read_str", .ret = -ERANGE },
{ .name = "probe_read_user", .ret = -EFAULT },
{ .name = "probe_read_user_str", .ret = -EFAULT },
{ .name = "copy_from_user", .ret = -EFAULT },
{ .name = "copy_from_user_task", .ret = -EFAULT },
};
void test_read_vsyscall(void)
{
struct read_vsyscall *skel;
unsigned int i;
int err;
#if !defined(__x86_64__)
test__skip();
return;
#endif
skel = read_vsyscall__open_and_load();
if (!ASSERT_OK_PTR(skel, "read_vsyscall open_load"))
return;
skel->bss->target_pid = getpid();
err = read_vsyscall__attach(skel);
if (!ASSERT_EQ(err, 0, "read_vsyscall attach"))
goto out;
/* userspace may don't have vsyscall page due to LEGACY_VSYSCALL_NONE,
* but it doesn't affect the returned error codes.
*/
skel->bss->user_ptr = (void *)VSYSCALL_ADDR;
usleep(1);
for (i = 0; i < ARRAY_SIZE(all_read); i++)
ASSERT_EQ(skel->bss->read_ret[i], all_read[i].ret, all_read[i].name);
out:
read_vsyscall__destroy(skel);
}
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