50 lines
3.1 KiB
C
50 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/nt/enum/pageflags.h"
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#include "libc/nt/memory.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/prot.h"
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#define HAS(X, BITS) (((X) & (BITS)) == (BITS))
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/**
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* Converts System Five memory protection flags to Windows NT, Part 1.
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* @see libc/sysv/consts.sh
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*/
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privileged uint32_t prot2nt(int prot, int flags) {
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return (HAS(prot, PROT_READ | PROT_WRITE | PROT_EXEC)
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? (HAS(flags, MAP_SHARED) || HAS(flags, MAP_ANONYMOUS))
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? kNtPageExecuteReadwrite
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: kNtPageExecuteWritecopy
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: HAS(prot, PROT_READ | PROT_WRITE)
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? (HAS(flags, MAP_SHARED) || HAS(flags, MAP_ANONYMOUS))
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? kNtPageReadwrite
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: kNtPageReadwrite /* kNtPageWritecopy */
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: HAS(prot, PROT_READ | PROT_EXEC)
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? kNtPageExecuteRead
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: HAS(prot, PROT_EXEC)
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? kNtPageExecute
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: HAS(prot, PROT_READ) ? kNtPageReadonly
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: kNtPageNoaccess) |
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((prot | flags) &
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(kNtSecReserve | kNtSecCommit | kNtSecImage | kNtSecImageNoExecute |
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kNtSecLargePages | kNtSecNocache | kNtSecWritecombine));
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}
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