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- Make rand64() thread safe
- Introduce lemur64 lcg prng
- Improve strace on New Technology
- Improve msync() on New Technology
This commit is contained in:
Justine Tunney 2022-04-07 00:15:35 -07:00
parent 43ba3009b2
commit 29bf8b1a30
73 changed files with 888 additions and 269 deletions
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36
libc/calls/directmap-nt.c
View file

@ -30,7 +30,7 @@ textwindows noasan struct DirectMap sys_mmap_nt(void *addr, size_t size,
int64_t handle, int64_t off) {
size_t i;
struct DirectMap dm;
uint32_t flags1, flags2;
struct ProtectNt fl;
const struct NtSecurityAttributes *sec;
if (flags & MAP_PRIVATE) {
@ -42,37 +42,19 @@ textwindows noasan struct DirectMap sys_mmap_nt(void *addr, size_t size,
if ((prot & PROT_WRITE) && (flags & MAP_PRIVATE) && handle != -1) {
// windows has cow pages but they can't propagate across fork()
if (prot & PROT_EXEC) {
flags1 = kNtPageExecuteWritecopy;
flags2 = kNtFileMapCopy | kNtFileMapExecute;
fl = (struct ProtectNt){kNtPageExecuteWritecopy,
kNtFileMapCopy | kNtFileMapExecute};
} else {
flags1 = kNtPageWritecopy;
flags2 = kNtFileMapCopy;
}
} else if (prot & PROT_WRITE) {
if (prot & PROT_EXEC) {
flags1 = kNtPageExecuteReadwrite;
flags2 = kNtFileMapWrite | kNtFileMapExecute;
} else {
flags1 = kNtPageReadwrite;
flags2 = kNtFileMapWrite;
}
} else if (prot & PROT_READ) {
if (prot & PROT_EXEC) {
flags1 = kNtPageExecuteRead;
flags2 = kNtFileMapRead | kNtFileMapExecute;
} else {
flags1 = kNtPageReadonly;
flags2 = kNtFileMapRead;
fl = (struct ProtectNt){kNtPageWritecopy, kNtFileMapCopy};
}
} else {
flags1 = kNtPageNoaccess;
flags2 = 0;
fl = __nt2prot(prot);
}
if ((dm.maphandle = CreateFileMapping(handle, sec, flags1, (size + off) >> 32,
(size + off), 0))) {
if ((dm.addr = MapViewOfFileEx(dm.maphandle, flags2, off >> 32, off, size,
addr))) {
if ((dm.maphandle = CreateFileMapping(handle, sec, fl.flags1,
(size + off) >> 32, (size + off), 0))) {
if ((dm.addr = MapViewOfFileEx(dm.maphandle, fl.flags2, off >> 32, off,
size, addr))) {
return dm;
}
CloseHandle(dm.maphandle);