51 lines
3.2 KiB
C
51 lines
3.2 KiB
C
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/*-*- 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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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: 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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