AcessNative/acesskernel_src/main.c

   1 /*
   2  * Acess2 Native Kernel
   3  * - Acess kernel emulation on another OS using SDL and UDP
   4  *
   5  * Kernel Main
   6  */
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <signal.h>
  10 #include <stdint.h>
  11 #ifdef __LINUX__
  12 #include <sys/prctl.h>
  13 #endif
  14 #include <unistd.h>
  15 #include <string.h>
  16 #include "../../KernelLand/Kernel/include/logdebug.h"
  17
  18 #define VALGRIND_CLIENT 0
  19
  20 // === IMPORTS ===
  21 extern int      UI_Initialise(int Width, int Height);
  22 extern void     UI_MainLoop(void);
  23 extern int      VFS_Init(void);
  24 extern int      PTY_Install(char **Arguments);
  25 extern int      Video_Install(char **Arguments);
  26 extern int      NativeKeyboard_Install(char **Arguments);
  27 extern int      NativeFS_Install(char **Arguments);
  28 extern void     Debug_SetKTerminal(char *Path);
  29 extern int      VT_Install(char **Arguments);
  30 extern int      Mouse_Install(char **Arguments);
  31 extern int      IPCPipe_Install(char **Arguments);
  32 extern int      Net_Install(char **Arguments);
  33 extern int      VFS_Mount(const char *Device, const char *MountPoint, const char *Filesystem, const char *Options);
  34 extern int      VFS_MkDir(const char *Path);
  35 extern int      SyscallServer(void);
  36 extern int      Server_Shutdown(void);
  37 extern const char       gsKernelVersion[];
  38 extern const char       gsGitHash[];
  39 extern int      giBuildNumber;
  40
  41 // === GLOBALS ===
  42 const char      *gsAcessDir = "../Usermode/Output/native";
  43
  44 // === CODE ===
  45 #ifndef __WIN32__
  46 #define P_NOWAIT        0
  47 int spawnv(int flags, const char *execuable, char * const argv[])
  48 {
  49         int pid = fork();
  50         if( pid != 0 )  return pid;
  51
  52         execv(execuable, argv);
  53         perror("spawnv - execve");
  54         for(;;);
  55 }
  56 #endif
  57
  58 int main(int argc, char *argv[])
  59 {
  60         char    **rootapp = NULL;
  61          int    rootapp_argc, i;
  62         // Parse command line settings
  63         for( i = 1; i < argc; i ++ )
  64         {
  65                 if( strcmp(argv[i], "--distroot") == 0 ) {
  66                         gsAcessDir = argv[++i];
  67                 }
  68                 else if( strcmp(argv[i], "--rootapp") == 0 ) {
  69                         rootapp = &argv[++i];
  70                         rootapp_argc = argc - i;
  71                         break;
  72                 }
  73                 else {
  74                         fprintf(stderr, "Unknown command line option '%s'\n", argv[i]);
  75                         return -1;
  76                 }
  77         }
  78
  79         // Kernel build information
  80         printf("Acess2 Native v%s\n", gsKernelVersion);
  81         printf(" Build %i, Git Hash %s\n", giBuildNumber, gsGitHash);
  82
  83         // Start UI subsystem
  84         UI_Initialise(800, 480);
  85
  86         // - Ignore SIGUSR1 (used to wake threads)
  87         #ifdef SIGUSR1
  88         signal(SIGUSR1, SIG_IGN);
  89         #endif
  90
  91         // Initialise VFS
  92         VFS_Init();
  93         // - Start IO Drivers
  94         if( Video_Install(NULL) ) {
  95                 Log_Error("Init", "Unable to load NativeVideo");
  96         }
  97         if( NativeKeyboard_Install(NULL) ) {
  98                 Log_Error("Init", "Unable to load NativeKeyboard");
  99         }
 100         NativeFS_Install(NULL);
 101         Mouse_Install(NULL);
 102         IPCPipe_Install(NULL);
 103         PTY_Install(NULL);
 104         Net_Install(NULL);
 105         // - Start VTerm
 106         {
 107                 char    *args[] = {
 108                         "Video=NativeVideo",
 109                         "Input=NativeKeyboard",
 110                         NULL
 111                         };
 112                 VT_Install(args);
 113         }
 114
 115         VFS_MkDir("/Acess");
 116         VFS_Mount(gsAcessDir, "/Acess", "nativefs", "");
 117
 118         Debug_SetKTerminal("/Devices/pts/vt7c");
 119
 120         // Start syscall server
 121         SyscallServer();
 122
 123         // Spawn root application
 124         if( rootapp )
 125         {
 126                  int    pid;
 127                  int    argcount = 0;
 128                 const char      *args[7+rootapp_argc+1+1];
 129
 130                 #if VALGRIND_CLIENT
 131                 args[argcount++] = "valgrind";
 132                 #endif
 133                 args[argcount++] = "./ld-acess";
 134                 args[argcount++] = "--open";    args[argcount++] = "/Devices/pts/vt0";
 135                 args[argcount++] = "--open";    args[argcount++] = "/Devices/pts/vt0";
 136                 args[argcount++] = "--open";    args[argcount++] = "/Devices/pts/vt0";
 137                 for( i = 0; i < rootapp_argc; i ++ )
 138                         args[argcount+i] = rootapp[i];
 139                 args[argcount+rootapp_argc] = NULL;
 140                 pid = spawnv(P_NOWAIT, "./ld-acess", (char *const*)args);
 141                 if(pid < 0) {
 142                         perror("Starting root application [fork(2)]");
 143                         return 1;
 144                 }
 145                 printf("Root application running as PID %i\n", pid);
 146         }
 147
 148         UI_MainLoop();
 149
 150         return 0;
 151 }
 152
 153 void AcessNative_Exit(void)
 154 {
 155         // TODO: Close client applications too
 156         Server_Shutdown();
 157         exit(0);
 158 }
 159
 160 uint64_t DivMod64U(uint64_t Num, uint64_t Den, uint64_t *Rem)
 161 {
 162         if(Rem) *Rem = Num % Den;
 163         return Num / Den;
 164 }
 165
 166 int Module_EnsureLoaded(const char *Name)
 167 {
 168         return 0;
 169 }
 170
 171 void Proc_PrintBacktrace(void)
 172 {
 173
 174 }
 175