cosmopolitan/libc/runtime/winmain.greg.c

192 lines
8.1 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/bits/bits.h"
#include "libc/bits/pushpop.h"
#include "libc/bits/weaken.h"
#include "libc/calls/internal.h"
#include "libc/dce.h"
#include "libc/fmt/fmt.h"
#include "libc/macros.h"
#include "libc/nt/console.h"
#include "libc/nt/enum/consolemodeflags.h"
#include "libc/nt/enum/filemapflags.h"
#include "libc/nt/enum/filetype.h"
#include "libc/nt/enum/loadlibrarysearch.h"
#include "libc/nt/enum/pageflags.h"
#include "libc/nt/enum/version.h"
#include "libc/nt/files.h"
#include "libc/nt/memory.h"
#include "libc/nt/pedef.internal.h"
#include "libc/nt/process.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/teb.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/memtrack.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/internal.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
struct WinArgs {
char *argv[512];
char *envp[512];
long auxv[1][2];
char argblock[ARG_MAX];
char envblock[ENV_MAX];
};
static struct CmdExe {
bool result;
struct OldNtConsole {
uint32_t codepage;
uint32_t mode;
int64_t handle;
} oldin, oldout;
} g_cmdexe;
static textwindows void RestoreCmdExe(void) {
if (g_cmdexe.oldin.handle) {
SetConsoleCP(g_cmdexe.oldin.codepage);
SetConsoleMode(g_cmdexe.oldin.handle, g_cmdexe.oldin.mode);
}
if (g_cmdexe.oldout.handle) {
SetConsoleOutputCP(g_cmdexe.oldout.codepage);
SetConsoleMode(g_cmdexe.oldout.handle, g_cmdexe.oldout.mode);
}
}
static textwindows void SetTrueColor(void) {
SetEnvironmentVariable(u"TERM", u"xterm-truecolor");
}
static textwindows void NormalizeCmdExe(void) {
int64_t handle, hstdin, hstdout, hstderr;
if ((int)weakaddr("v_ntsubsystem") == kNtImageSubsystemWindowsCui &&
NtGetVersion() >= kNtVersionWindows10) {
atexit(RestoreCmdExe);
hstdin = GetStdHandle(pushpop(kNtStdInputHandle));
hstdout = GetStdHandle(pushpop(kNtStdOutputHandle));
hstderr = GetStdHandle(pushpop(kNtStdErrorHandle));
if (GetFileType((handle = hstdin)) == kNtFileTypeChar) {
SetTrueColor();
g_cmdexe.oldin.handle = handle;
g_cmdexe.oldin.codepage = GetConsoleCP();
SetConsoleCP(kNtCpUtf8);
GetConsoleMode(handle, &g_cmdexe.oldin.mode);
SetConsoleMode(handle, g_cmdexe.oldin.mode | kNtEnableProcessedInput |
kNtEnableEchoInput | kNtEnableLineInput |
kNtEnableWindowInput |
kNtEnableVirtualTerminalInput);
}
if (GetFileType((handle = hstdout)) == kNtFileTypeChar ||
GetFileType((handle = hstderr)) == kNtFileTypeChar) {
SetTrueColor();
g_cmdexe.oldout.handle = handle;
g_cmdexe.oldout.codepage = GetConsoleOutputCP();
SetConsoleOutputCP(kNtCpUtf8);
GetConsoleMode(handle, &g_cmdexe.oldout.mode);
SetConsoleMode(handle, g_cmdexe.oldout.mode | kNtEnableProcessedOutput |
kNtEnableWrapAtEolOutput |
(NtGetVersion() >= kNtVersionWindows10
? kNtEnableVirtualTerminalProcessing
: 0));
}
}
}
static textwindows char *AllocateMemory(void *addr, size_t size, int64_t *h) {
return MapViewOfFileExNuma(
(*h = CreateFileMappingNuma(-1, NULL, pushpop(kNtPageExecuteReadwrite), 0,
size, NULL, kNtNumaNoPreferredNode)),
kNtFileMapRead | kNtFileMapWrite, 0, 0, size, addr,
kNtNumaNoPreferredNode);
}
static textwindows wontreturn void WinMainNew(void) {
int64_t h;
size_t size;
int i, count;
uint64_t data;
struct WinArgs *wa;
const char16_t *env16;
NormalizeCmdExe();
*(/*unconst*/ int *)&__hostos = WINDOWS;
size = ROUNDUP(STACKSIZE + sizeof(struct WinArgs), FRAMESIZE);
data = (intptr_t)AllocateMemory((char *)0x777000000000, size, &_mmi.p[0].h);
_mmi.p[0].x = data >> 16;
_mmi.p[0].y = (data >> 16) + ((size >> 16) - 1);
_mmi.p[0].prot = PROT_READ | PROT_WRITE;
_mmi.p[0].flags = MAP_PRIVATE | MAP_ANONYMOUS;
_mmi.i = pushpop(1L);
wa = (struct WinArgs *)(data + size - sizeof(struct WinArgs));
count = GetDosArgv(GetCommandLine(), wa->argblock, ARG_MAX, wa->argv, 512);
for (i = 0; wa->argv[0][i]; ++i) {
if (wa->argv[0][i] == '\\') {
wa->argv[0][i] = '/';
}
}
env16 = GetEnvironmentStrings();
GetDosEnviron(env16, wa->envblock, ENV_MAX, wa->envp, 512);
FreeEnvironmentStrings(env16);
wa->auxv[0][0] = pushpop(0L);
wa->auxv[0][1] = pushpop(0L);
_jmpstack((char *)data + STACKSIZE, _executive, count, wa->argv, wa->envp,
wa->auxv);
}
/**
* Main function on Windows NT.
*
* The Cosmopolitan Runtime provides the following services, which aim
* to bring Windows NT behavior closer in harmony with System Five:
*
* 1. We configure CMD.EXE for UTF-8 and enable ANSI colors on Win10.
*
* 2. Command line arguments are passed as a blob of UTF-16 text. We
* chop them up into an char *argv[] UTF-8 data structure, in
* accordance with the DOS conventions for argument quoting.
*
* 3. Environment variables are passed to us as a sorted UTF-16 double
* NUL terminated list. We translate this to char ** using UTF-8.
*
* 4. Allocates new stack at a high address. NT likes to choose a
* stack address that's beneath the program image. We want to be
* able to assume that stack addresses are located at higher
* addresses than heap and program memory.
*
* 5. Windows users are afraid of "drive-by downloads" where someone
* might accidentally an evil DLL to their Downloads folder which
* then overrides the behavior of a legitimate EXE being run from
* the downloads folder. Since we don't even use dynamic linking,
* we've cargo culted some API calls, that may harden against it.
*
* 6. Finally, we need fork. Microsoft designed Windows to prevent us
* from having fork() so we pass pipe handles in an environment
* variable literally copy all the memory.
*
* @param hInstance call GetModuleHandle(NULL) from main if you need it
*/
textwindows int64_t WinMain(int64_t hInstance, int64_t hPrevInstance,
const char *lpCmdLine, int nCmdShow) {
SetDefaultDllDirectories(kNtLoadLibrarySearchSearchSystem32);
if (weaken(winsockinit)) weaken(winsockinit)();
if (weaken(WinMainForked)) weaken(WinMainForked)();
WinMainNew();
}