mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
47 lines
2.5 KiB
C
47 lines
2.5 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 │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/nt/enum/pageflags.h"
|
|
#include "libc/runtime/directmap.internal.h"
|
|
#include "libc/sysv/consts/prot.h"
|
|
|
|
privileged uint32_t __prot2nt(int prot, bool iscow) {
|
|
switch (prot & (PROT_READ | PROT_WRITE | PROT_EXEC)) {
|
|
case PROT_READ:
|
|
return kNtPageReadonly;
|
|
case PROT_EXEC:
|
|
case PROT_EXEC | PROT_READ:
|
|
return kNtPageExecuteRead;
|
|
case PROT_WRITE:
|
|
case PROT_READ | PROT_WRITE:
|
|
if (iscow) {
|
|
return kNtPageWritecopy;
|
|
} else {
|
|
return kNtPageReadwrite;
|
|
}
|
|
case PROT_WRITE | PROT_EXEC:
|
|
case PROT_READ | PROT_WRITE | PROT_EXEC:
|
|
if (iscow) {
|
|
return kNtPageExecuteWritecopy;
|
|
} else {
|
|
return kNtPageExecuteReadwrite;
|
|
}
|
|
default:
|
|
return kNtPageNoaccess;
|
|
}
|
|
}
|