51 lines
3.2 KiB
C
51 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ This program is free software; you can redistribute it and/or modify │
|
|
│ it under the terms of the GNU General Public License as published by │
|
|
│ the Free Software Foundation; version 2 of the License. │
|
|
│ │
|
|
│ This program is distributed in the hope that it will be useful, but │
|
|
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
|
|
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
|
|
│ General Public License for more details. │
|
|
│ │
|
|
│ You should have received a copy of the GNU General Public License │
|
|
│ along with this program; if not, write to the Free Software │
|
|
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
|
│ 02110-1301 USA │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/nt/enum/pageflags.h"
|
|
#include "libc/nt/memory.h"
|
|
#include "libc/sysv/consts/map.h"
|
|
#include "libc/sysv/consts/prot.h"
|
|
|
|
#define HAS(X, BITS) (((X) & (BITS)) == (BITS))
|
|
|
|
/**
|
|
* Converts System Five memory protection flags to Windows NT, Part 1.
|
|
* @see libc/sysv/consts.sh
|
|
*/
|
|
privileged uint32_t prot2nt(int prot, int flags) {
|
|
return (HAS(prot, PROT_READ | PROT_WRITE | PROT_EXEC)
|
|
? (HAS(flags, MAP_SHARED) || HAS(flags, MAP_ANONYMOUS))
|
|
? kNtPageExecuteReadwrite
|
|
: kNtPageExecuteWritecopy
|
|
: HAS(prot, PROT_READ | PROT_WRITE)
|
|
? (HAS(flags, MAP_SHARED) || HAS(flags, MAP_ANONYMOUS))
|
|
? kNtPageReadwrite
|
|
: kNtPageReadwrite /* kNtPageWritecopy */
|
|
: HAS(prot, PROT_READ | PROT_EXEC)
|
|
? kNtPageExecuteRead
|
|
: HAS(prot, PROT_EXEC)
|
|
? kNtPageExecute
|
|
: HAS(prot, PROT_READ) ? kNtPageReadonly
|
|
: kNtPageNoaccess) |
|
|
((prot | flags) &
|
|
(kNtSecReserve | kNtSecCommit | kNtSecImage | kNtSecImageNoExecute |
|
|
kNtSecLargePages | kNtSecNocache | kNtSecWritecombine));
|
|
}
|