mirror of
https://github.com/clearlinux/graphene.git
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Michał Kowalczyk
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* SPDX-License-Identifier: LGPL-3.0-or-later */
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/* Copyright (C) 2020 Invisible Things Lab
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* Michał Kowalczyk <mkow@invisiblethingslab.com>
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*/
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/*
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* This file defines conversions between Linux syscall flags and PAL API flags.
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*
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* For Linux-based PALs there is pal_flag_conv.h in Linux-common, mirroring those conversions.
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*/
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#ifndef SHIM_FLAGS_CONV_H
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#define SHIM_FLAGS_CONV_H
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#include <asm/fcntl.h>
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#include <linux/fcntl.h>
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#include <linux/mman.h>
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#include "assert.h"
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#include "pal.h"
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static inline int LINUX_PROT_TO_PAL(int prot, int map_flags) {
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assert(WITHIN_MASK(prot, PROT_NONE | PROT_READ | PROT_WRITE | PROT_EXEC
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| PROT_GROWSDOWN | PROT_GROWSUP));
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return (prot & PROT_READ ? PAL_PROT_READ : 0) |
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(prot & PROT_WRITE ? PAL_PROT_WRITE : 0) |
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(prot & PROT_EXEC ? PAL_PROT_EXEC : 0) |
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(map_flags & MAP_PRIVATE ? PAL_PROT_WRITECOPY : 0);
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}
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static inline int LINUX_OPEN_FLAGS_TO_PAL_ACCESS(int access) {
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return (access & O_RDONLY ? PAL_ACCESS_RDONLY : 0) |
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(access & O_WRONLY ? PAL_ACCESS_WRONLY : 0) |
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(access & O_RDWR ? PAL_ACCESS_RDWR : 0) |
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(access & O_APPEND ? PAL_ACCESS_APPEND : 0);
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}
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static inline int LINUX_OPEN_FLAGS_TO_PAL_CREATE(int flags) {
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if (WITHIN_MASK(O_CREAT | O_EXCL, flags))
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return PAL_CREATE_ALWAYS;
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if (flags & O_CREAT)
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return PAL_CREATE_TRY;
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return 0;
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}
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static inline int LINUX_OPEN_FLAGS_TO_PAL_OPTIONS(int flags) {
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return (flags & O_CLOEXEC ? PAL_OPTION_CLOEXEC : 0) |
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(flags & O_NONBLOCK ? PAL_OPTION_NONBLOCK : 0);
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}
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#endif /* SHIM_FLAGS_CONV_H */
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