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cosmopolitan/libc/runtime/winmain.greg.c
Justine Tunney 31194165d2
Remove .internal from more header filenames
2024-08-04 12:52:25 -07:00

336 lines
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et 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/assert.h"
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/intrin/dll.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/maps.h"
#include "libc/intrin/nomultics.h"
#include "libc/intrin/weaken.h"
#include "libc/limits.h"
#include "libc/macros.h"
#include "libc/nexgen32e/rdtsc.h"
#include "libc/nt/accounting.h"
#include "libc/nt/console.h"
#include "libc/nt/enum/consolemodeflags.h"
#include "libc/nt/enum/filemapflags.h"
#include "libc/nt/enum/pageflags.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/signals.h"
#include "libc/nt/struct/systeminfo.h"
#include "libc/nt/systeminfo.h"
#include "libc/nt/thunk/msabi.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/winargs.internal.h"
#include "libc/serialize.h"
#include "libc/sock/internal.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/prot.h"
#ifdef __x86_64__
#define abi __msabi textwindows dontinstrument
// clang-format off
__msabi extern typeof(AddVectoredExceptionHandler) *const __imp_AddVectoredExceptionHandler;
__msabi extern typeof(CreateFileMapping) *const __imp_CreateFileMappingW;
__msabi extern typeof(DuplicateHandle) *const __imp_DuplicateHandle;
__msabi extern typeof(FreeEnvironmentStrings) *const __imp_FreeEnvironmentStringsW;
__msabi extern typeof(GetCommandLine) *const __imp_GetCommandLineW;
__msabi extern typeof(GetConsoleMode) *const __imp_GetConsoleMode;
__msabi extern typeof(GetCurrentDirectory) *const __imp_GetCurrentDirectoryW;
__msabi extern typeof(GetCurrentProcessId) *const __imp_GetCurrentProcessId;
__msabi extern typeof(GetEnvironmentStrings) *const __imp_GetEnvironmentStringsW;
__msabi extern typeof(GetEnvironmentVariable) *const __imp_GetEnvironmentVariableW;
__msabi extern typeof(GetFileAttributes) *const __imp_GetFileAttributesW;
__msabi extern typeof(GetStdHandle) *const __imp_GetStdHandle;
__msabi extern typeof(GetSystemInfo) *const __imp_GetSystemInfo;
__msabi extern typeof(GetSystemInfo) *const __imp_GetSystemInfo;
__msabi extern typeof(GetUserName) *const __imp_GetUserNameW;
__msabi extern typeof(MapViewOfFileEx) *const __imp_MapViewOfFileEx;
__msabi extern typeof(SetConsoleCP) *const __imp_SetConsoleCP;
__msabi extern typeof(SetConsoleMode) *const __imp_SetConsoleMode;
__msabi extern typeof(SetConsoleOutputCP) *const __imp_SetConsoleOutputCP;
__msabi extern typeof(SetEnvironmentVariable) *const __imp_SetEnvironmentVariableW;
__msabi extern typeof(SetStdHandle) *const __imp_SetStdHandle;
__msabi extern typeof(VirtualProtect) *const __imp_VirtualProtect;
__msabi extern typeof(WriteFile) *const __imp_WriteFile;
// clang-format on
void cosmo(int, char **, char **, long (*)[2]) wontreturn;
void __stack_call(int, char **, char **, long (*)[2],
void (*)(int, char **, char **, long (*)[2]),
intptr_t) wontreturn;
__funline int IsAlpha(int c) {
return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
}
static abi char16_t *StrStr(const char16_t *haystack, const char16_t *needle) {
size_t i;
for (;;) {
for (i = 0;; ++i) {
if (!needle[i])
return (/*unconst*/ char16_t *)haystack;
if (!haystack[i])
break;
if (needle[i] != haystack[i])
break;
}
if (!*haystack++)
break;
}
return 0;
}
static abi void PrintError(const char *s, size_t n) {
#define PrintError(s) PrintError(s, sizeof(s) - 1)
__imp_WriteFile(__imp_GetStdHandle(kNtStdErrorHandle), s, n, 0, 0);
}
// detect the unholiest of environments
static abi bool32 IsWslChimera(void) {
char16_t path[PATH_MAX];
return __imp_GetCurrentDirectoryW(PATH_MAX, path) && //
path[0] == '\\' && //
path[1] == '\\' && //
path[2] == 'w' && //
path[3] == 's' && //
path[4] == 'l';
}
// returns true if utf-8 path is a win32-style path that exists
static abi bool32 WinFileExists(const char *path) {
uint16_t path16[PATH_MAX];
size_t z = ARRAYLEN(path16);
size_t n = tprecode8to16(path16, z, path).ax;
if (n >= z - 1)
return false;
return __imp_GetFileAttributesW(path16) != -1u;
}
// this ensures close(1) won't accidentally close(2) for example
static abi void DeduplicateStdioHandles(void) {
for (long i = 0; i < 3; ++i) {
int64_t h1 = __imp_GetStdHandle(kNtStdio[i]);
for (long j = i + 1; j < 3; ++j) {
int64_t h2 = __imp_GetStdHandle(kNtStdio[j]);
if (h1 == h2) {
int64_t h3;
__imp_DuplicateHandle(-1, h2, -1, &h3, 0, false,
kNtDuplicateSameAccess);
__imp_SetStdHandle(kNtStdio[j], h3);
}
}
}
}
static bool32 HasEnvironmentVariable(const char16_t *name) {
char16_t buf[4];
return __imp_GetEnvironmentVariableW(name, buf, ARRAYLEN(buf));
}
static abi unsigned OnWinCrash(struct NtExceptionPointers *ep) {
int code, sig = __sig_crash_sig(ep->ExceptionRecord->ExceptionCode, &code);
TerminateThisProcess(sig);
}
// main function of windows init process
// i.e. first process spawned that isn't forked
static abi wontreturn void WinInit(const char16_t *cmdline) {
__oldstack = (intptr_t)__builtin_frame_address(0);
__imp_SetConsoleOutputCP(kNtCpUtf8);
// make console into utf-8 ansi/xterm style tty
if ((intptr_t)v_ntsubsystem == kNtImageSubsystemWindowsCui) {
__imp_SetConsoleCP(kNtCpUtf8);
__imp_SetConsoleOutputCP(kNtCpUtf8);
for (int i = 0; i <= 2; ++i) {
uint32_t m;
intptr_t h = __imp_GetStdHandle(kNtStdio[i]);
if (__imp_GetConsoleMode(h, &m)) {
if (!i) {
m |= kNtEnableMouseInput | kNtEnableWindowInput |
kNtEnableProcessedInput;
} else {
m &= ~kNtDisableNewlineAutoReturn;
m |= kNtEnableProcessedOutput | kNtEnableVirtualTerminalProcessing;
}
__imp_SetConsoleMode(h, m);
}
}
}
// so crash signals can be reported to cosmopolitan bash
__imp_AddVectoredExceptionHandler(true, (void *)OnWinCrash);
// allocate memory for stack and argument block
intptr_t stackhand;
char *stackaddr = (char *)GetStaticStackAddr(0);
size_t stacksize = GetStaticStackSize();
__imp_MapViewOfFileEx(
(stackhand = __imp_CreateFileMappingW(-1, 0, kNtPageExecuteReadwrite,
stacksize >> 32, stacksize, NULL)),
kNtFileMapWrite | kNtFileMapExecute, 0, 0, stacksize, stackaddr);
int stackprot = (intptr_t)ape_stack_prot;
if (~stackprot & PROT_EXEC) {
uint32_t old;
__imp_VirtualProtect(stackaddr, stacksize, kNtPageReadwrite, &old);
}
uint32_t oldattr;
__imp_VirtualProtect(stackaddr, GetGuardSize(),
kNtPageReadwrite | kNtPageGuard, &oldattr);
if (_weaken(__maps_stack)) {
struct NtSystemInfo si;
__imp_GetSystemInfo(&si);
_weaken(__maps_stack)(stackaddr, si.dwPageSize, GetGuardSize(), stacksize,
stackprot, stackhand);
}
struct WinArgs *wa =
(struct WinArgs *)(stackaddr + (stacksize - sizeof(struct WinArgs)));
// define $TERM if it's not already present
// programs like emacs will stop the world and nag if it's not set
if (!HasEnvironmentVariable(u"TERM")) {
__imp_SetEnvironmentVariableW(u"TERM", u"xterm-256color");
}
// define $USER as GetUserName() if not set
// Windows doesn't define this environment variable by default
uint32_t vsize = ARRAYLEN(wa->tmp16);
if (!HasEnvironmentVariable(u"USER") &&
__imp_GetUserNameW(&wa->tmp16, &vsize)) {
__imp_SetEnvironmentVariableW(u"USER", wa->tmp16);
}
// define $HOME as $HOMEDRIVE$HOMEPATH if not set
// Windows doesn't define this environment variable by default
uint32_t vlen;
if (!HasEnvironmentVariable(u"HOME") &&
(vlen = __imp_GetEnvironmentVariableW(u"HOMEDRIVE", wa->tmp16,
ARRAYLEN(wa->tmp16))) <
ARRAYLEN(wa->tmp16) &&
(vlen += __imp_GetEnvironmentVariableW(u"HOMEPATH", wa->tmp16 + vlen,
ARRAYLEN(wa->tmp16) - vlen)) <
ARRAYLEN(wa->tmp16) &&
vlen) {
__imp_SetEnvironmentVariableW(u"HOME", wa->tmp16);
}
// parse utf-16 command into utf-8 argv array in argument block
int count = GetDosArgv(cmdline, wa->argblock, ARRAYLEN(wa->argblock),
wa->argv, ARRAYLEN(wa->argv));
// normalize executable path
if (wa->argv[0] && !WinFileExists(wa->argv[0])) {
unsigned i, n = 0;
while (wa->argv[0][n])
++n;
if (n + 4 < sizeof(wa->argv0buf)) {
for (i = 0; i < n; ++i) {
wa->argv0buf[i] = wa->argv[0][i];
}
WRITE32LE(wa->argv0buf + i, READ32LE(".com"));
if (WinFileExists(wa->argv0buf)) {
wa->argv[0] = wa->argv0buf;
}
}
}
// munge argv so dos paths become cosmo paths
for (int i = 0; wa->argv[i]; ++i) {
if (wa->argv[i][0] == '\\' && //
wa->argv[i][1] == '\\') {
// don't munge new technology style paths
continue;
}
if (!WinFileExists(wa->argv[i])) {
// don't munge if we're not certain it's a file
continue;
}
// use forward slashes
for (int j = 0; wa->argv[i][j]; ++j) {
if (wa->argv[i][j] == '\\') {
wa->argv[i][j] = '/';
}
}
// turn c:/... into /c/...
if (IsAlpha(wa->argv[i][0]) && //
wa->argv[i][1] == ':' && //
wa->argv[i][2] == '/') {
wa->argv[i][1] = wa->argv[i][0];
wa->argv[i][0] = '/';
}
}
// translate utf-16 win32 environment into utf-8 environment variables
char16_t *env16 = __imp_GetEnvironmentStringsW();
GetDosEnviron(env16, wa->envblock, ARRAYLEN(wa->envblock) - 8, wa->envp,
ARRAYLEN(wa->envp) - 1);
__imp_FreeEnvironmentStringsW(env16);
__envp = &wa->envp[0];
// handover control to cosmopolitan runtime
__stack_call(count, wa->argv, wa->envp, wa->auxv, cosmo,
(uintptr_t)(stackaddr + (stacksize - sizeof(struct WinArgs))));
}
abi int64_t WinMain(int64_t hInstance, int64_t hPrevInstance,
const char *lpCmdLine, int64_t nCmdShow) {
const char16_t *cmdline;
extern char os asm("__hostos");
os = _HOSTWINDOWS; // madness https://news.ycombinator.com/item?id=21019722
kStartTsc = rdtsc();
if (!IsTiny() && IsWslChimera()) {
PrintError("error: APE is running on WIN32 inside WSL. You need to run: "
"sudo sh -c 'echo -1 > /proc/sys/fs/binfmt_misc/WSLInterop'\n");
return 77 << 8; // exit(77)
}
struct NtSystemInfo si;
__imp_GetSystemInfo(&si);
__pagesize = si.dwPageSize;
__gransize = si.dwAllocationGranularity;
__umask = 077;
__pid = __imp_GetCurrentProcessId();
cmdline = __imp_GetCommandLineW();
#if SYSDEBUG
// sloppy flag-only check for early initialization
if (StrStr(cmdline, u"--strace"))
++__strace;
#endif
if (_weaken(WinSockInit)) {
_weaken(WinSockInit)();
}
DeduplicateStdioHandles();
if (_weaken(WinMainForked)) {
_weaken(WinMainForked)();
}
WinInit(cmdline);
}
#endif /* __x86_64__ */
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