13b4b4df98
CloudABI executables already provide support for passing in vDSOs. This functionality is used by the emulator for OS X to inject system call handlers. On FreeBSD, we could use it to optimize calls to gettimeofday(), etc. Though I don't have any plans to optimize any system calls right now, let's go ahead and already pass in a vDSO. This will allow us to simplify the executables, as the traditional "syscall" shims can be removed entirely. It also means that we gain more flexibility with regards to adding and removing system calls. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D7438
85 lines
3.3 KiB
C
85 lines
3.3 KiB
C
/*-
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* Copyright (c) 2015 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _CLOUDABI_UTIL_H_
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#define _CLOUDABI_UTIL_H_
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#include <sys/socket.h>
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#include <contrib/cloudabi/cloudabi_types_common.h>
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struct file;
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struct sysentvec;
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struct thread;
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struct timespec;
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/* Fetches the time value of a clock. */
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int cloudabi_clock_time_get(struct thread *, cloudabi_clockid_t,
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cloudabi_timestamp_t *);
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/* Converts a FreeBSD errno to a CloudABI errno. */
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cloudabi_errno_t cloudabi_convert_errno(int);
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/* Converts FreeBSD's struct sockaddr to CloudABI's cloudabi_sockaddr_t. */
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void cloudabi_convert_sockaddr(const struct sockaddr *, socklen_t,
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cloudabi_sockaddr_t *);
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/* Converts a file descriptor to a CloudABI file descriptor type. */
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cloudabi_filetype_t cloudabi_convert_filetype(const struct file *);
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/* Converts CloudABI rights to a set of Capsicum capabilities. */
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int cloudabi_convert_rights(cloudabi_rights_t, cap_rights_t *);
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/* Removes rights that conflict with the file descriptor type. */
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void cloudabi_remove_conflicting_rights(cloudabi_filetype_t,
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cloudabi_rights_t *, cloudabi_rights_t *);
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/* Converts a struct timespec to a CloudABI timestamp. */
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int cloudabi_convert_timespec(const struct timespec *, cloudabi_timestamp_t *);
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/*
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* Blocking futex functions.
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*
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* These functions are called by CloudABI's polling system calls to
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* sleep on a lock or condition variable.
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*/
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int cloudabi_futex_condvar_wait(struct thread *, cloudabi_condvar_t *,
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cloudabi_scope_t, cloudabi_lock_t *, cloudabi_scope_t, cloudabi_clockid_t,
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cloudabi_timestamp_t, cloudabi_timestamp_t);
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int cloudabi_futex_lock_rdlock(struct thread *, cloudabi_lock_t *,
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cloudabi_scope_t, cloudabi_clockid_t, cloudabi_timestamp_t,
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cloudabi_timestamp_t);
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int cloudabi_futex_lock_wrlock(struct thread *, cloudabi_lock_t *,
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cloudabi_scope_t, cloudabi_clockid_t, cloudabi_timestamp_t,
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cloudabi_timestamp_t);
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/* vDSO setup and teardown. */
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void cloudabi_vdso_init(struct sysentvec *, char *, char *);
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void cloudabi_vdso_destroy(struct sysentvec *);
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#endif
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