WIP work towards msvc support

dll/msvcrt.cpp

@@ -1,27 +1,131 @@
 #include "common.h"
 
+#include <spawn.h>
+#include <string>
+
+// from https://codebrowser.dev/glibc/glibc/sysdeps/x86/fpu_control.h.html
+#define _FPU_GETCW(cw) __asm__ __volatile__ ("fnstcw %0" : "=m" (*&cw))
+#define _FPU_SETCW(cw) __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw))
+
+typedef void (WIN_ENTRY *_PVFV)(void);
+
 namespace msvcrt {
 	int _commode;
 	int _fmode;
 
+	int fpcntrl;
+
+	char **___initenv;
+	char **__pgmptr;
+
 	// Stub because we're only ever a console application
-	void WIN_FUNC __set_app_type(int at) {
+	void WIN_ENTRY __set_app_type(int at) {
 	}
 
-	int* WIN_FUNC __p__fmode() {
+	int* WIN_ENTRY __p__fmode() {
 		return &_fmode;
 	}
 
-	int* WIN_FUNC __p__commode() {
+	int* WIN_ENTRY __p__commode() {
 		return &_commode;
 	}
-}
 
+	char*** WIN_ENTRY __p___initenv(void) {
+		return &___initenv;
+	}
+
+	char **WIN_ENTRY __p__pgmptr(void) {
+		if (!__pgmptr) {
+			__pgmptr = (char**)malloc(1000000);
+			// TODO put something in here?
+		}
+		return __pgmptr;
+	}
+
+	FILE* WIN_ENTRY __p__iob(void) {
+		return nullptr;
+	}
+
+	unsigned int WIN_ENTRY _controlfp(unsigned int new_value, unsigned int mask) {
+		DEBUG_LOG("_controlfp called with value: 0x%X, mask: 0x%X\n", new_value, mask);
+
+		_FPU_GETCW(fpcntrl);
+		fpcntrl = ((fpcntrl & ~mask) | (new_value & mask));
+		_FPU_SETCW(fpcntrl);
+
+		return fpcntrl;
+	}
+
+	void WIN_ENTRY _initterm(_PVFV *start, _PVFV *end) {
+		_PVFV* it = start;
+
+		while (it < end) {
+			if (*it != nullptr) {
+				(**it)();
+			}
+			it++;
+		}
+	}
+
+	int WIN_ENTRY __getmainargs(int* argc, char*** argv, char*** env, int doWildCard, void* startInfo) {
+		DEBUG_LOG("__getmainargs: %p, %p, %p, %i, %p\n", argc, argv, env, doWildCard, startInfo);
+		*argc = wibo::argc;
+		*argv = wibo::argv;
+
+		return 0; // success
+	}
+
+	void WIN_ENTRY setbuf(FILE* file, char *buf) {
+
+	}
+
+	int WIN_ENTRY _spawnvp(int mode, char* cmdname, char** argv) {
+		DEBUG_LOG("_spawnvp: %s\n", cmdname);
+
+		setenv("WIBO_DEBUG_INDENT", std::to_string(wibo::debugIndent + 1).c_str(), true);
+
+		char *new_argv[]  = {cmdname};
+
+		pid_t pid;
+		if (posix_spawn(&pid, wibo::executableName, NULL, NULL, new_argv, environ)) {
+			return 0;
+		};
+
+		return 1;
+	}
+}
 
 static void *resolveByName(const char *name) {
 	if (strcmp(name, "__set_app_type") == 0) return (void *) msvcrt::__set_app_type;
 	if (strcmp(name, "__p__fmode") == 0) return (void *) msvcrt::__p__fmode;
 	if (strcmp(name, "__p__commode") == 0) return (void *) msvcrt::__p__commode;
+	if (strcmp(name, "__p___initenv") == 0) return (void *) msvcrt::__p___initenv;
+	if (strcmp(name, "__p__pgmptr") == 0) return (void *) msvcrt::__p__pgmptr;
+	if (strcmp(name, "__p__iob") == 0) return (void *) msvcrt::__p__iob;
+	if (strcmp(name, "_controlfp") == 0) return (void *) msvcrt::_controlfp;
+	if (strcmp(name, "_initterm") == 0) return (void *) msvcrt::_initterm;
+	if (strcmp(name, "__getmainargs") == 0) return (void *) msvcrt::__getmainargs;
+	if (strcmp(name, "setbuf") == 0) return (void *) msvcrt::setbuf;
+	if (strcmp(name, "_spawnvp") == 0) return (void *) msvcrt::_spawnvp;
+
+	// 1:1 mappings with linux funcs
+	if (strcmp(name, "exit") == 0) return (void *) exit;
+	if (strcmp(name, "fopen") == 0) return (void *) fopen;
+	if (strcmp(name, "fclose") == 0) return (void *) fclose;
+	if (strcmp(name, "free") == 0) return (void *) free;
+	if (strcmp(name, "getenv") == 0) return (void *) getenv;
+	if (strcmp(name, "malloc") == 0) return (void *) malloc;
+	if (strcmp(name, "memcpy") == 0) return (void *) memcpy;
+	if (strcmp(name, "memmove") == 0) return (void *) memmove;
+	if (strcmp(name, "memset") == 0) return (void *) memset;
+	if (strcmp(name, "strcat") == 0) return (void *) strcat;
+	if (strcmp(name, "strchr") == 0) return (void *) strchr;
+	if (strcmp(name, "strcmp") == 0) return (void *) strcmp;
+	if (strcmp(name, "strncmp") == 0) return (void *) strncmp;
+	if (strcmp(name, "strcpy") == 0) return (void *) strcpy;
+	if (strcmp(name, "strlen") == 0) return (void *) strlen;
+	if (strcmp(name, "strncpy") == 0) return (void *) strncpy;
+	if (strcmp(name, "strtoul") == 0) return (void *) strtoul;
 	return nullptr;
 }
 
@@ -33,6 +137,8 @@ wibo::Module lib_msvcrt = {
 		"msvcrt40.dll",
 		"msvcr70",
 		"msvcr70.dll",
+		"msvcr71",
+		"msvcr71.dll",
 		nullptr,
 	},
 	resolveByName,