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
  17 // === IMPORTS ===
  18 extern int      UI_Initialise(int Width, int Height);
  19 extern void     UI_MainLoop(void);
  20 extern int      VFS_Init(void);
  21 extern int      Video_Install(char **Arguments);
  22 extern int      NativeKeyboard_Install(char **Arguments);
  23 extern int      NativeFS_Install(char **Arguments);
  24 extern void     Debug_SetKTerminal(char *Path);
  25 extern int      VT_Install(char **Arguments);
  26 extern int      VFS_Mount(const char *Device, const char *MountPoint, const char *Filesystem, const char *Options);
  27 extern int      VFS_MkDir(const char *Path);
  28 extern int      SyscallServer(void);
  29 extern const char       gsKernelVersion[];
  30 extern const char       gsGitHash[];
  31 extern int      giBuildNumber;
  32
  33 // === GLOBALS ===
  34 const char      *gsAcessDir = "../Usermode/Output/x86_64";
  35
  36 // === CODE ===
  37 int main(int argc, char *argv[])
  38 {
  39         char    **rootapp = NULL;
  40          int    rootapp_argc, i;
  41         // Parse command line settings
  42         for( i = 1; i < argc; i ++ )
  43         {
  44                 if( strcmp(argv[i], "--distroot") == 0 ) {
  45                         gsAcessDir = argv[++i];
  46                 }
  47                 else if( strcmp(argv[i], "--rootapp") == 0 ) {
  48                         rootapp = &argv[++i];
  49                         rootapp_argc = argc - i;
  50                         break;
  51                 }
  52                 else {
  53                         fprintf(stderr, "Unknown command line option '%s'\n", argv[i]);
  54                         return -1;
  55                 }
  56         }
  57
  58         // Kernel build information
  59         printf("Acess2 Native v%s\n", gsKernelVersion);
  60         printf(" Build %i, Git Hash %s\n", giBuildNumber, gsGitHash);
  61
  62         // Start UI subsystem
  63         UI_Initialise(800, 480);
  64
  65         // - Ignore SIGUSR1 (used to wake threads)
  66         signal(SIGUSR1, SIG_IGN);
  67
  68         // Initialise VFS
  69         VFS_Init();
  70         // - Start IO Drivers
  71         if( Video_Install(NULL) ) {
  72                 Log_Error("Init", "Unable to load NativeVideo");
  73         }
  74         if( NativeKeyboard_Install(NULL) ) {
  75                 Log_Error("Init", "Unable to load NativeKeyboard");
  76         }
  77         NativeFS_Install(NULL);
  78         // - Start VTerm
  79         {
  80                 char    *args[] = {
  81                         "Video=NativeVideo",
  82                         "Input=NativeKeyboard",
  83                         NULL
  84                         };
  85                 VT_Install(args);
  86         }
  87
  88         VFS_MkDir("/Acess");
  89         VFS_Mount(gsAcessDir, "/Acess", "nativefs", "");
  90
  91         Debug_SetKTerminal("/Devices/VTerm/8");
  92
  93         // Start syscall server
  94         SyscallServer();
  95
  96         // Spawn root application
  97         if( rootapp )
  98         {
  99                  int    pid;
 100                 char    *args[7+rootapp_argc+1];
 101
 102                 args[0] = "ld-acess";
 103                 args[1] = "--open";     args[2] = "/Devices/VTerm/0";
 104                 args[3] = "--open";     args[4] = "/Devices/VTerm/0";
 105                 args[5] = "--open";     args[6] = "/Devices/VTerm/0";
 106                 for( i = 0; i < rootapp_argc; i ++ )
 107                         args[7+i] = rootapp[i];
 108                 args[7+rootapp_argc] = NULL;
 109
 110                 pid = fork();
 111                 if(pid < 0) {
 112                         perror("Starting root application [fork(2)]");
 113                         return 1;
 114                 }
 115                 if(pid == 0)
 116                 {
 117                         #ifdef __LINUX__
 118                         prctl(PR_SET_PDEATHSIG, SIGHUP);        // LINUX ONLY!
 119                         #endif
 120                         execv("./ld-acess", args);
 121                 }
 122                 printf("Root application running as PID %i\n", pid);
 123         }
 124
 125         UI_MainLoop();
 126
 127         return 0;
 128 }
 129
 130 void AcessNative_Exit(void)
 131 {
 132         // TODO: Close client applications too
 133         exit(0);
 134 }
 135
 136 uint64_t DivMod64U(uint64_t Num, uint64_t Den, uint64_t *Rem)
 137 {
 138         if(Rem) *Rem = Num % Den;
 139         return Num / Den;
 140 }
 141
 142 int Module_EnsureLoaded(const char *Name)
 143 {
 144         return 0;
 145 }
 146