Add build system scaffolding and libc headers

1 files changed, 101 insertions, 0 deletions

diff --git a/include/arch/x86_64/linux/eventpoll.h b/include/arch/x86_64/linux/eventpoll.h
new file mode 100644
index 00000000..a550e6de
--- /dev/null
+++ b/include/arch/x86_64/linux/eventpoll.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ *  include/linux/eventpoll.h ( Efficient event polling implementation )
+ *  Copyright (C) 2001,...,2006	 Davide Libenzi
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Davide Libenzi <davidel@xmailserver.org>
+ *
+ */
+
+#ifndef _LINUX_EVENTPOLL_H
+#define _LINUX_EVENTPOLL_H
+
+/* For O_CLOEXEC */
+#include <linux/fcntl.h>
+#include <linux/types.h>
+
+/* Flags for epoll_create1.  */
+#define EPOLL_CLOEXEC O_CLOEXEC
+
+/* Valid opcodes to issue to sys_epoll_ctl() */
+#define EPOLL_CTL_ADD 1
+#define EPOLL_CTL_DEL 2
+#define EPOLL_CTL_MOD 3
+
+/* Epoll event masks */
+#define EPOLLIN	    (__poll_t)0x00000001
+#define EPOLLPRI    (__poll_t)0x00000002
+#define EPOLLOUT    (__poll_t)0x00000004
+#define EPOLLERR    (__poll_t)0x00000008
+#define EPOLLHUP    (__poll_t)0x00000010
+#define EPOLLNVAL   (__poll_t)0x00000020
+#define EPOLLRDNORM (__poll_t)0x00000040
+#define EPOLLRDBAND (__poll_t)0x00000080
+#define EPOLLWRNORM (__poll_t)0x00000100
+#define EPOLLWRBAND (__poll_t)0x00000200
+#define EPOLLMSG    (__poll_t)0x00000400
+#define EPOLLRDHUP  (__poll_t)0x00002000
+
+/*
+ * Internal flag - wakeup generated by io_uring, used to detect recursion back
+ * into the io_uring poll handler.
+ */
+#define EPOLL_URING_WAKE ((__poll_t)(1U << 27))
+
+/* Set exclusive wakeup mode for the target file descriptor */
+#define EPOLLEXCLUSIVE ((__poll_t)(1U << 28))
+
+/*
+ * Request the handling of system wakeup events so as to prevent system suspends
+ * from happening while those events are being processed.
+ *
+ * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be
+ * re-allowed until epoll_wait is called again after consuming the wakeup
+ * event(s).
+ *
+ * Requires CAP_BLOCK_SUSPEND
+ */
+#define EPOLLWAKEUP ((__poll_t)(1U << 29))
+
+/* Set the One Shot behaviour for the target file descriptor */
+#define EPOLLONESHOT ((__poll_t)(1U << 30))
+
+/* Set the Edge Triggered behaviour for the target file descriptor */
+#define EPOLLET ((__poll_t)(1U << 31))
+
+/*
+ * On x86-64 make the 64bit structure have the same alignment as the
+ * 32bit structure. This makes 32bit emulation easier.
+ *
+ * UML/x86_64 needs the same packing as x86_64
+ */
+#ifdef __x86_64__
+#define EPOLL_PACKED __attribute__((packed))
+#else
+#define EPOLL_PACKED
+#endif
+
+struct epoll_event {
+	__poll_t events;
+	__u64 data;
+} EPOLL_PACKED;
+
+struct epoll_params {
+	__u32 busy_poll_usecs;
+	__u16 busy_poll_budget;
+	__u8 prefer_busy_poll;
+
+	/* pad the struct to a multiple of 64bits */
+	__u8 __pad;
+};
+
+#define EPOLL_IOC_TYPE 0x8A
+#define EPIOCSPARAMS   _IOW(EPOLL_IOC_TYPE, 0x01, struct epoll_params)
+#define EPIOCGPARAMS   _IOR(EPOLL_IOC_TYPE, 0x02, struct epoll_params)
+
+#endif /* _LINUX_EVENTPOLL_H */