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Optimize memory layout

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Justine Tunney 2022-09-12 04:19:32 -07:00
parent 0305194d98
commit b69f3d2488
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GPG key ID: BE714B4575D6E328
41 changed files with 383 additions and 347 deletions
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15
libc/runtime/winmain.greg.c
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@ -166,8 +166,8 @@ __msabi static textwindows wontreturn void WinMainNew(const char16_t *cmdline) {
char outflagsbuf[128];
const char16_t *env16;
int i, prot, count, version;
size_t allocsize, stacksize;
intptr_t stackaddr, allocaddr;
size_t allocsize, argsize, stacksize;
version = NtGetPeb()->OSMajorVersion;
__oldstack = (intptr_t)__builtin_frame_address(0);
if ((intptr_t)v_ntsubsystem == kNtImageSubsystemWindowsCui && version >= 10) {
@ -190,15 +190,14 @@ __msabi static textwindows wontreturn void WinMainNew(const char16_t *cmdline) {
rc);
}
}
_Static_assert(sizeof(struct WinArgs) % FRAMESIZE == 0, "");
_mmi.p = _mmi.s;
_mmi.n = ARRAYLEN(_mmi.s);
argsize = ROUNDUP(sizeof(struct WinArgs), FRAMESIZE);
stackaddr = GetStaticStackAddr(0);
stacksize = GetStackSize();
allocsize = argsize + stacksize;
allocaddr = stackaddr - argsize;
NTTRACE("WinMainNew() mapping %'zu byte arg block + stack at %p", allocsize,
allocaddr);
allocaddr = stackaddr;
allocsize = stacksize + sizeof(struct WinArgs);
NTTRACE("WinMainNew() mapping %'zu byte stack at %p", allocsize, allocaddr);
MapViewOfFileEx(
(_mmi.p[0].h =
CreateFileMapping(-1, &kNtIsInheritable, kNtPageExecuteReadwrite,
@ -209,12 +208,12 @@ __msabi static textwindows wontreturn void WinMainNew(const char16_t *cmdline) {
VirtualProtect((void *)allocaddr, allocsize, kNtPageReadwrite, &oldprot);
}
_mmi.p[0].x = allocaddr >> 16;
_mmi.p[0].y = (allocaddr >> 16) + ((allocsize >> 16) - 1);
_mmi.p[0].y = (allocaddr >> 16) + ((allocsize - 1) >> 16);
_mmi.p[0].prot = prot;
_mmi.p[0].flags = 0x00000026; // stack+anonymous
_mmi.p[0].size = allocsize;
_mmi.i = 1;
wa = (struct WinArgs *)allocaddr;
wa = (struct WinArgs *)(allocaddr + stacksize);
NTTRACE("WinMainNew() loading arg block");
count = GetDosArgv(cmdline, wa->argblock, ARRAYLEN(wa->argblock), wa->argv,
ARRAYLEN(wa->argv));