This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weisssc...@linutronix.de>
---
tools/include/nolibc/Makefile | 1 +
tools/include/nolibc/nolibc.h | 1 +
tools/include/nolibc/sys/random.h | 32 ++++++++++++++++++++++++++++
tools/testing/selftests/nolibc/nolibc-test.c | 19 +++++++++++++++++
4 files changed, 53 insertions(+)
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile
index
e05862cd08051685112f067d6eb45716613dd43c..b22ff1e268b2e4bd788e974d6d8f2e1ef96dfc5f
100644
--- a/tools/include/nolibc/Makefile
+++ b/tools/include/nolibc/Makefile
@@ -47,6 +47,7 @@ all_files := \
sys.h \
sys/auxv.h \
sys/mman.h \
+ sys/random.h \
sys/stat.h \
sys/syscall.h \
sys/time.h \
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index
d1b949e094eeb7cc0fe875deeafa4c972ecf35b2..3f329feb379c4c808d2e56fbb2b7a6c4b08a7c0d
100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -98,6 +98,7 @@
#include "sys.h"
#include "sys/auxv.h"
#include "sys/mman.h"
+#include "sys/random.h"
#include "sys/stat.h"
#include "sys/syscall.h"
#include "sys/time.h"
diff --git a/tools/include/nolibc/sys/random.h
b/tools/include/nolibc/sys/random.h
new file mode 100644
index
0000000000000000000000000000000000000000..b5a904dffbfb5039ca8f9efb9eaf68e7bb1716b5
--- /dev/null
+++ b/tools/include/nolibc/sys/random.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * random definitions for NOLIBC
+ * Copyright (C) 2025 Thomas Weißschuh <thomas.weisssc...@linutronix.de>
+ */
+
+#ifndef _NOLIBC_SYS_RANDOM_H
+#define _NOLIBC_SYS_RANDOM_H
+
+#include "../arch.h"
+#include "../sys.h"
+
+/*
+ * ssize_t getrandom(void *buf, size_t buflen, unsigned int flags);
+ */
+
+static __attribute__((unused))
+ssize_t sys_getrandom(void *buf, size_t buflen, unsigned int flags)
+{
+ return my_syscall3(__NR_getrandom, buf, buflen, flags);
+}
+
+static __attribute__((unused))
+ssize_t getrandom(void *buf, size_t buflen, unsigned int flags)
+{
+ return __sysret(sys_getrandom(buf, buflen, flags));
+}
+
+/* make sure to include all global symbols */
+#include "../nolibc.h"
+
+#endif /* _NOLIBC_SYS_RANDOM_H */
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c
b/tools/testing/selftests/nolibc/nolibc-test.c
index
abe0ae794208762f6d91ad81e902fbf77253a1c1..95d08e9ccf5b3be924548100e9621cd47f39e8c2
100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -20,6 +20,7 @@
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
+#include <sys/random.h>
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/stat.h>
@@ -807,6 +808,23 @@ static int test_dirent(void)
return 0;
}
+int test_getrandom(void)
+{
+ uint64_t rng = 0;
+ ssize_t ret;
+
+ ret = getrandom(&rng, sizeof(rng), 0);
+ if (ret != sizeof(rng))
+ return ret;
+
+ if (!rng) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ return 0;
+}
+
int test_getpagesize(void)
{
int x = getpagesize();
@@ -1124,6 +1142,7 @@ int run_syscall(int min, int max)
CASE_TEST(getdents64_root); EXPECT_SYSNE(1,
test_getdents64("/"), -1); break;
CASE_TEST(getdents64_null); EXPECT_SYSER(1,
test_getdents64("/dev/null"), -1, ENOTDIR); break;
CASE_TEST(directories); EXPECT_SYSZR(proc,
test_dirent()); break;
+ CASE_TEST(getrandom); EXPECT_SYSZR(1,
test_getrandom()); break;
CASE_TEST(gettimeofday_tv); EXPECT_SYSZR(1, gettimeofday(&tv,
NULL)); break;
CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv,
&tz)); break;
CASE_TEST(getpagesize); EXPECT_SYSZR(1,
test_getpagesize()); break;
--
2.49.0
