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Write more memory mapping tests

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Microsoft claims to support COW but it's probably not true.
This commit is contained in:
Justine Tunney 2021-02-04 18:24:33 -08:00
parent 74d48f7cb6
commit 2fdc19e7a7
6 changed files with 83 additions and 29 deletions
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7
libc/runtime/winmain.greg.c
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@ -107,9 +107,10 @@ static noasan textwindows wontreturn void WinMainNew(void) {
*(/*unconst*/ int *)&__hostos = WINDOWS;
addr = NtGetVersion() < kNtVersionWindows10 ? 0xff00000 : 0x777000000000;
size = ROUNDUP(STACKSIZE + sizeof(struct WinArgs), FRAMESIZE);
_mmi.p[0].h = __sys_mmap_nt((char *)addr, size,
PROT_READ | PROT_WRITE | PROT_EXEC, -1, 0)
.maphandle;
_mmi.p[0].h =
sys_mmap_nt((char *)addr, size, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE, -1, 0)
.maphandle;
_mmi.p[0].x = addr >> 16;
_mmi.p[0].y = (addr >> 16) + ((size >> 16) - 1);
_mmi.p[0].prot = PROT_READ | PROT_WRITE | PROT_EXEC;