lib/libmain.c

   1 // Called from entry.S to get us going.
   2 // entry.S already took care of defining envs, pages, vpd, and vpt.
   3
   4 #include <inc/lib.h>
   5
   6 extern void umain(int argc, char **argv);
   7
   8 volatile struct Env *env;
   9 char *binaryname = "(PROGRAM NAME UNKNOWN)";
  10
  11 void
  12 libmain(int argc, char **argv)
  13 {
  14         // set env to point at our env structure in envs[].
  15         // LAB 3: Your code here.
  16         envid_t envid;
  17
  18         envid = sys_getenvid();
  19         env = &envs[ENVX(envid)];
  20
  21         // save the name of the program so that panic() can use it
  22         if (argc > 0)
  23                 binaryname = argv[0];
  24
  25         // call user main routine
  26         umain(argc, argv);
  27
  28         // exit gracefully
  29         exit();
  30 }
  31