This is used in various selftests and will be handy when integrating those with nolibc.
Signed-off-by: Thomas Weißschuh thomas.weissschuh@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.weissschuh@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;