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The sys_foo() naming scheme used by the syscall wrappers may collide with application symbols. Especially as 'sys_' is an obvious naming scheme an application may choose for its own custom systemcall wrappers. Avoid these conflicts by using an leading underscore which moves the names into the implementation's namespace. This naming scheme was chosen over a '__nolibc_' prefix, as these functions are not an implementation detail but a documented interface meant to be used by applications. While this may break some existing users, adapting them should be straightforward. Given that nolibc is most-likely vendored, no unexpected breakage should happen. No in-tree users are affected. These conflicts happen when compiling some of the kernel selftests with nolibc. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260319-nolibc-namespacing-v1-1-33c22eaddb5e@weissschuh.net
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* poll definitions for NOLIBC
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* Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
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*/
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/* make sure to include all global symbols */
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#include "nolibc.h"
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#ifndef _NOLIBC_POLL_H
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#define _NOLIBC_POLL_H
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#include "arch.h"
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#include "sys.h"
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#include <linux/poll.h>
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#include <linux/time.h>
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/*
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* int poll(struct pollfd *fds, int nfds, int timeout);
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*/
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static __attribute__((unused))
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int _sys_poll(struct pollfd *fds, int nfds, int timeout)
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{
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#if defined(__NR_ppoll_time64)
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struct __kernel_timespec t;
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if (timeout >= 0) {
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t.tv_sec = timeout / 1000;
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t.tv_nsec = (timeout % 1000) * 1000000;
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}
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return __nolibc_syscall5(__NR_ppoll_time64, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
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#else
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struct __kernel_old_timespec t;
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if (timeout >= 0) {
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t.tv_sec = timeout / 1000;
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t.tv_nsec = (timeout % 1000) * 1000000;
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}
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return __nolibc_syscall5(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
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#endif
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}
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static __attribute__((unused))
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int poll(struct pollfd *fds, int nfds, int timeout)
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{
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return __sysret(_sys_poll(fds, nfds, timeout));
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}
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#endif /* _NOLIBC_POLL_H */
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