7a1591c1b6
Replace all uses of kern_mmap with kern_mmap_req move the old kern_mmap. Reand rename kern_mmap_req to kern_mmap . The helper saved some code churn initially, but having multiple interfaces is sub-optimal. Obtained from: CheriBSD Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D28292
168 lines
4.3 KiB
C
168 lines
4.3 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/proc.h>
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#include <sys/syscallsubr.h>
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#include <contrib/cloudabi/cloudabi_types_common.h>
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#include <compat/cloudabi/cloudabi_proto.h>
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/* Converts CloudABI's memory protection flags to FreeBSD's. */
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static int
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convert_mprot(cloudabi_mprot_t in, int *out)
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{
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/* Unknown protection flags. */
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if ((in & ~(CLOUDABI_PROT_EXEC | CLOUDABI_PROT_WRITE |
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CLOUDABI_PROT_READ)) != 0)
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return (ENOTSUP);
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/* W^X: Write and exec cannot be enabled at the same time. */
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if ((in & (CLOUDABI_PROT_EXEC | CLOUDABI_PROT_WRITE)) ==
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(CLOUDABI_PROT_EXEC | CLOUDABI_PROT_WRITE))
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return (ENOTSUP);
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*out = 0;
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if (in & CLOUDABI_PROT_EXEC)
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*out |= PROT_EXEC;
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if (in & CLOUDABI_PROT_WRITE)
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*out |= PROT_WRITE;
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if (in & CLOUDABI_PROT_READ)
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*out |= PROT_READ;
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return (0);
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}
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int
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cloudabi_sys_mem_advise(struct thread *td,
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struct cloudabi_sys_mem_advise_args *uap)
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{
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int behav;
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switch (uap->advice) {
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case CLOUDABI_ADVICE_DONTNEED:
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behav = MADV_DONTNEED;
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break;
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case CLOUDABI_ADVICE_NORMAL:
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behav = MADV_NORMAL;
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break;
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case CLOUDABI_ADVICE_RANDOM:
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behav = MADV_RANDOM;
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break;
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case CLOUDABI_ADVICE_SEQUENTIAL:
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behav = MADV_SEQUENTIAL;
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break;
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case CLOUDABI_ADVICE_WILLNEED:
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behav = MADV_WILLNEED;
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break;
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default:
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return (EINVAL);
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}
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return (kern_madvise(td, (uintptr_t)uap->mapping, uap->mapping_len,
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behav));
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}
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int
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cloudabi_sys_mem_map(struct thread *td, struct cloudabi_sys_mem_map_args *uap)
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{
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int error, flags, prot;
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/* Translate flags. */
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flags = 0;
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if (uap->flags & CLOUDABI_MAP_ANON)
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flags |= MAP_ANON;
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if (uap->flags & CLOUDABI_MAP_FIXED)
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flags |= MAP_FIXED;
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if (uap->flags & CLOUDABI_MAP_PRIVATE)
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flags |= MAP_PRIVATE;
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if (uap->flags & CLOUDABI_MAP_SHARED)
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flags |= MAP_SHARED;
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/* Translate protection. */
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error = convert_mprot(uap->prot, &prot);
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if (error != 0)
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return (error);
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return (kern_mmap(td, &(struct mmap_req){
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.mr_hint = (uintptr_t)uap->addr,
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.mr_len = uap->len,
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.mr_prot = prot,
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.mr_flags = flags,
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.mr_fd = uap->fd,
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.mr_pos = uap->off,
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}));
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}
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int
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cloudabi_sys_mem_protect(struct thread *td,
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struct cloudabi_sys_mem_protect_args *uap)
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{
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int error, prot;
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/* Translate protection. */
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error = convert_mprot(uap->prot, &prot);
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if (error != 0)
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return (error);
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return (kern_mprotect(td, (uintptr_t)uap->mapping, uap->mapping_len,
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prot));
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}
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int
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cloudabi_sys_mem_sync(struct thread *td, struct cloudabi_sys_mem_sync_args *uap)
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{
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int flags;
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/* Convert flags. */
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switch (uap->flags & (CLOUDABI_MS_ASYNC | CLOUDABI_MS_SYNC)) {
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case CLOUDABI_MS_ASYNC:
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flags = MS_ASYNC;
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break;
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case CLOUDABI_MS_SYNC:
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flags = MS_SYNC;
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break;
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default:
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return (EINVAL);
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}
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if ((uap->flags & CLOUDABI_MS_INVALIDATE) != 0)
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flags |= MS_INVALIDATE;
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return (kern_msync(td, (uintptr_t)uap->mapping, uap->mapping_len,
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flags));
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}
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int
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cloudabi_sys_mem_unmap(struct thread *td,
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struct cloudabi_sys_mem_unmap_args *uap)
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{
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return (kern_munmap(td, (uintptr_t)uap->mapping, uap->mapping_len));
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}
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