X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fthreads%2Finit.c;h=ef67071aec53daceb476b02faf3af4fe48fd7824;hb=059da604af2d69cf3a765df3d63db693edf51d3b;hp=9774493d9e31f8af5687d421d3f0d987e17f389f;hpb=34a1a2cf11500505e74ae5796e88de0d8de00958;p=pintos-anon

diff --git a/src/threads/init.c b/src/threads/init.c
index 9774493..ef67071 100644
--- a/src/threads/init.c
+++ b/src/threads/init.c
@@ -62,27 +62,33 @@ int main (void) NO_RETURN;
 int
 main (void)
 {
-  /* Initialize everything needed for printf() first. */
+  /* Clear BSS and get machine's RAM size. */  
   ram_init ();
+
+  /* Initialize ourselves as a thread so we can use locks. */
   thread_init ();
+
+  /* Initialize the console so we can use printf(). */
   vga_init ();
   serial_init_poll ();
   console_init ();
 
   /* Greet user. */
-  printf ("Pintos booting with %'zd kB RAM...\n", ram_pages * (PGSIZE / 1024));
+  printf ("Pintos booting with %'zu kB RAM...\n", ram_pages * PGSIZE / 1024);
 
   /* Parse command line. */
   argv_init ();
 
-  /* Initialize memory system, segments, paging. */
+  /* Initialize memory system. */
   palloc_init ();
+  malloc_init ();
   paging_init ();
+
+  /* Segmentation. */
 #ifdef USERPROG
   tss_init ();
   gdt_init ();
 #endif
-  malloc_init ();
 
   /* Set random seed if argv_init() didn't. */
   random_init (0);
@@ -122,14 +128,15 @@ main (void)
 #endif
     }
 #else
+  /* Run the compiled-in test function. */
   test ();
 #endif
 
+  /* Finish up. */
   if (do_power_off) 
     power_off ();
-
-  /* Terminate this thread. */
-  thread_exit ();
+  else 
+    thread_exit ();
 }
 
 /* Clear BSS and obtain RAM size from loader. */
@@ -222,9 +229,11 @@ argv_init (void)
 #ifdef USERPROG
     else if (!strcmp (argv[i], "-ex")) 
       initial_program = argv[++i];
+    else if (!strcmp (argv[i], "-ul"))
+      user_page_limit = atoi (argv[++i]);
 #endif
 #ifdef FILESYS
-  else if (!strcmp (argv[i], "-f"))
+    else if (!strcmp (argv[i], "-f"))
       format_filesys = true;
     else if (!strcmp (argv[i], "-ci")) 
       {
@@ -250,6 +259,7 @@ argv_init (void)
           " -d CLASS[,...]      Enable the given classes of debug messages.\n"
 #ifdef USERPROG
           " -ex 'PROG [ARG...]' Run PROG, passing the optional arguments.\n"
+          " -ul USER_MAX        Limit user memory to USER_MAX pages.\n"
 #endif
 #ifdef FILESYS
           " -f                  Format the filesystem disk (hdb or hd0:1).\n"