linux-kernel - [PATCH v2 16/32] tools/nolibc: use pselect6

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Message-Id: <20250407-nolibc-kselftest-harness-v2-16-f8812f76e930@linutronix.de>
Date: Mon, 07 Apr 2025 08:52:39 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Shuah Khan <shuah@...nel.org>, Shuah Khan <skhan@...uxfoundation.org>, 
 Willy Tarreau <w@....eu>, 
 Thomas Weißschuh <linux@...ssschuh.net>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v2 16/32] tools/nolibc: use pselect6_time64 if available

riscv32 does not have any of the older select systemcalls.
Use pselect6_time64 instead.
poll() is also used to implement sleep().

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Acked-by: Willy Tarreau <w@....eu>
---
 tools/include/nolibc/sys.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 08c1c074bec89a27e53e5d461a3ebbf71ec323d1..a5decdba402236fa0935207f9207c771ac2700bf 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -1023,6 +1023,14 @@ int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeva
 		t.tv_nsec = timeout->tv_usec * 1000;
 	}
 	return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
+#elif defined(__NR_pselect6_time64)
+	struct __kernel_timespec t;
+
+	if (timeout) {
+		t.tv_sec  = timeout->tv_sec;
+		t.tv_nsec = timeout->tv_usec * 1000;
+	}
+	return my_syscall6(__NR_pselect6_time64, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
 #else
 	return __nolibc_enosys(__func__, nfds, rfds, wfds, efds, timeout);
 #endif

-- 
2.49.0