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 #define VALGRIND_CLIENT 0
  18
  19 // === IMPORTS ===
  20 extern int      UI_Initialise(int Width, int Height);
  21 extern void     UI_MainLoop(void);
  22 extern int      VFS_Init(void);
  23 extern int      Video_Install(char **Arguments);
  24 extern int      NativeKeyboard_Install(char **Arguments);
  25 extern int      NativeFS_Install(char **Arguments);
  26 extern void     Debug_SetKTerminal(char *Path);
  27 extern int      VT_Install(char **Arguments);
  28 extern int      VFS_Mount(const char *Device, const char *MountPoint, const char *Filesystem, const char *Options);
  29 extern int      VFS_MkDir(const char *Path);
  30 extern int      SyscallServer(void);
  31 extern int      Server_Shutdown(void);
  32 extern const char       gsKernelVersion[];
  33 extern const char       gsGitHash[];
  34 extern int      giBuildNumber;
  35
  36 // === GLOBALS ===
  37 const char      *gsAcessDir = "../Usermode/Output/x86_64";
  38
  39 // === CODE ===
  40 int main(int argc, char *argv[])
  41 {
  42         char    **rootapp = NULL;
  43          int    rootapp_argc, i;
  44         // Parse command line settings
  45         for( i = 1; i < argc; i ++ )
  46         {
  47                 if( strcmp(argv[i], "--distroot") == 0 ) {
  48                         gsAcessDir = argv[++i];
  49                 }
  50                 else if( strcmp(argv[i], "--rootapp") == 0 ) {
  51                         rootapp = &argv[++i];
  52                         rootapp_argc = argc - i;
  53                         break;
  54                 }
  55                 else {
  56                         fprintf(stderr, "Unknown command line option '%s'\n", argv[i]);
  57                         return -1;
  58                 }
  59         }
  60
  61         // Kernel build information
  62         printf("Acess2 Native v%s\n", gsKernelVersion);
  63         printf(" Build %i, Git Hash %s\n", giBuildNumber, gsGitHash);
  64
  65         // Start UI subsystem
  66         UI_Initialise(800, 480);
  67
  68         // - Ignore SIGUSR1 (used to wake threads)
  69         signal(SIGUSR1, SIG_IGN);
  70
  71         // Initialise VFS
  72         VFS_Init();
  73         // - Start IO Drivers
  74         if( Video_Install(NULL) ) {
  75                 Log_Error("Init", "Unable to load NativeVideo");
  76         }
  77         if( NativeKeyboard_Install(NULL) ) {
  78                 Log_Error("Init", "Unable to load NativeKeyboard");
  79         }
  80         NativeFS_Install(NULL);
  81         // - Start VTerm
  82         {
  83                 char    *args[] = {
  84                         "Video=NativeVideo",
  85                         "Input=NativeKeyboard",
  86                         NULL
  87                         };
  88                 VT_Install(args);
  89         }
  90
  91         VFS_MkDir("/Acess");
  92         VFS_Mount(gsAcessDir, "/Acess", "nativefs", "");
  93
  94         Debug_SetKTerminal("/Devices/VTerm/8");
  95
  96         // Start syscall server
  97         SyscallServer();
  98
  99         // Spawn root application
 100         if( rootapp )
 101         {
 102                  int    pid;
 103                  int    argcount = 0;
 104                 char    *args[7+rootapp_argc+1+1];
 105
 106                 #if VALGRIND_CLIENT
 107                 args[argcount++] = "valgrind";
 108                 #endif
 109                 args[argcount++] = "./ld-acess";
 110                 args[argcount++] = "--open";    args[argcount++] = "/Devices/VTerm/0";
 111                 args[argcount++] = "--open";    args[argcount++] = "/Devices/VTerm/0";
 112                 args[argcount++] = "--open";    args[argcount++] = "/Devices/VTerm/0";
 113                 for( i = 0; i < rootapp_argc; i ++ )
 114                         args[argcount+i] = rootapp[i];
 115                 args[argcount+rootapp_argc] = NULL;
 116
 117                 pid = fork();
 118                 if(pid < 0) {
 119                         perror("Starting root application [fork(2)]");
 120                         return 1;
 121                 }
 122                 if(pid == 0)
 123                 {
 124                         #ifdef __LINUX__
 125                         prctl(PR_SET_PDEATHSIG, SIGHUP);        // LINUX ONLY!
 126                         #endif
 127                         #if VALGRIND_CLIENT
 128                         execv("valgrind", args);
 129                         #else
 130                         execv("./ld-acess", args);
 131                         #endif
 132                 }
 133                 printf("Root application running as PID %i\n", pid);
 134         }
 135
 136         UI_MainLoop();
 137
 138         return 0;
 139 }
 140
 141 void AcessNative_Exit(void)
 142 {
 143         // TODO: Close client applications too
 144         Server_Shutdown();
 145         exit(0);
 146 }
 147
 148 uint64_t DivMod64U(uint64_t Num, uint64_t Den, uint64_t *Rem)
 149 {
 150         if(Rem) *Rem = Num % Den;
 151         return Num / Den;
 152 }
 153
 154 int Module_EnsureLoaded(const char *Name)
 155 {
 156         return 0;
 157 }
 158