/*-*- 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__ */