enterpgdir -> entrypgdir

entry.S

@@ -44,11 +44,11 @@ entry:
   orl     $(CR4_PSE), %eax
   movl    %eax, %cr4
   # Set page directory
-  movl    $(V2P_WO(enterpgdir)), %eax
+  movl    $(V2P_WO(entrypgdir)), %eax
   movl    %eax, %cr3
   # Turn on paging.
   movl    %cr0, %eax
-  orl     $(CR0_PE|CR0_PG|CR0_WP), %eax
+  orl     $(CR0_PG|CR0_WP), %eax
   movl    %eax, %cr0
 
   # now switch to using addresses above KERNBASE

main.c

@@ -60,7 +60,7 @@ mpmain(void)
   scheduler();     // start running processes
 }
 
-pde_t enterpgdir[];  // For entry.S
+pde_t entrypgdir[];  // For entry.S
 
 // Start the non-boot (AP) processors.
 static void
@@ -83,15 +83,15 @@ startothers(void)
 
     // Tell entryother.S what stack to use, the address of mpenter and pgdir;
     // We cannot use kpgdir yet, because the AP processor is running in low 
-    // memory, so we use enterpgdir for the APs too.  kalloc can return addresses
+    // memory, so we use entrypgdir for the APs too.  kalloc can return addresses
     // above 4Mbyte (the machine may have much more physical memory than 4Mbyte), which 
-    // aren't mapped by enterpgdir, so we must allocate a stack using enter_alloc();
+    // aren't mapped by entrypgdir, so we must allocate a stack using enter_alloc();
     // This introduces the constraint that xv6 cannot use kalloc until after these 
     // last enter_alloc invocations.
     stack = enter_alloc();
     *(void**)(code-4) = stack + KSTACKSIZE;
     *(void**)(code-8) = mpenter;
-    *(int**)(code-12) = (void *) v2p(enterpgdir);
+    *(int**)(code-12) = (void *) v2p(entrypgdir);
 
     lapicstartap(c->id, v2p(code));
 
@@ -106,7 +106,7 @@ startothers(void)
 // hence the "__aligned__" attribute.  
 // Use PTE_PS in page directory entry to enable 4Mbyte pages.
 __attribute__((__aligned__(PGSIZE)))
-pde_t enterpgdir[NPDENTRIES] = {
+pde_t entrypgdir[NPDENTRIES] = {
   // Map VA's [0, 4MB) to PA's [0, 4MB)
   [0] = (0) + PTE_P + PTE_W + PTE_PS,
   // Map VA's [KERNBASE, KERNBASE+4MB) to PA's [0, 4MB)

usertests.c

@@ -1,3 +1,4 @@
+#include "param.h"
 #include "types.h"
 #include "stat.h"
 #include "user.h"
@@ -240,8 +241,10 @@ pipe1(void)
       if(cc > sizeof(buf))
         cc = sizeof(buf);
     }
-    if(total != 5 * 1033)
+    if(total != 5 * 1033){
       printf(1, "pipe1 oops 3 total %d\n", total);
+      exit();
+    }
     close(fds[0]);
     wait();
   } else {
@@ -401,10 +404,12 @@ sharedfd(void)
   }
   close(fd);
   unlink("sharedfd");
-  if(nc == 10000 && np == 10000)
+  if(nc == 10000 && np == 10000){
     printf(1, "sharedfd ok\n");
-  else
+  } else {
     printf(1, "sharedfd oops %d %d\n", nc, np);
+    exit();
+  }
 }
 
 // two processes write two different files at the same
@@ -423,7 +428,7 @@ twofiles(void)
   pid = fork();
   if(pid < 0){
     printf(1, "fork failed\n");
-    return;
+    exit();
   }
 
   fname = pid ? "f1" : "f2";
@@ -1582,6 +1587,14 @@ fsfull()
   printf(1, "fsfull test finished\n");
 }
 
+unsigned long randstate = 1;
+unsigned int
+rand()
+{
+  randstate = randstate * 1664525 + 1013904223;
+  return randstate;
+}
+
 int
 main(int argc, char *argv[])
 {