Add jitter feature to Bochs.

[pintos-anon] / src / userprog / exception.c

diff --git a/src/userprog/exception.c b/src/userprog/exception.c
index 24985514aa5882d832e1035afd1effa43b7b61cc..4f3e4f9d120efcef5ddecf1fb845956e0e44f40d 100644 (file)
--- a/src/userprog/exception.c
+++ b/src/userprog/exception.c
@@ -1,9 +1,9 @@
-#include "exception.h"
+#include "userprog/exception.h"
 #include <inttypes.h>
-#include "lib.h"
-#include "gdt.h"
-#include "interrupt.h"
-#include "thread.h"
+#include <stdio.h>
+#include "userprog/gdt.h"
+#include "threads/interrupt.h"
+#include "threads/thread.h"
 
 static void kill (struct intr_frame *);
 static void page_fault (struct intr_frame *);
@@ -12,9 +12,10 @@ static void page_fault (struct intr_frame *);
    programs.
 
    In a real Unix-like OS, most of these interrupts would be
-   passed along to the user process in the form of signals, but
-   we don't implement signals.  Instead, we'll make them simply
-   kill the user process.
+   passed along to the user process in the form of signals, as
+   described in [SV-386] 3-24 and 3-25, but we don't implement
+   signals.  Instead, we'll make them simply kill the user
+   process.
 
    Page faults are an exception.  Here they are treated the same
    way as other exceptions, but this will need to change to
@@ -72,9 +73,8 @@ kill (struct intr_frame *f)
     case SEL_UCSEG:
       /* User's code segment, so it's a user exception, as we
          expected.  Kill the user process.  */
-      printk ("%s: dying due to interrupt %#04x (%s).\n",
-              thread_name (thread_current ()),
-              f->vec_no, intr_name (f->vec_no));
+      printf ("%s: dying due to interrupt %#04x (%s).\n",
+              thread_name (), f->vec_no, intr_name (f->vec_no));
       intr_dump_frame (f);
       thread_exit (); 
 
@@ -89,7 +89,7 @@ kill (struct intr_frame *f)
     default:
       /* Some other code segment?  Shouldn't happen.  Panic the
          kernel. */
-      printk ("Interrupt %#04x (%s) in unknown segment %04x\n",
+      printf ("Interrupt %#04x (%s) in unknown segment %04x\n",
              f->vec_no, intr_name (f->vec_no), f->cs);
       thread_exit ();
     }
@@ -101,7 +101,8 @@ kill (struct intr_frame *f)
 #define PF_U 0x4    /* 0: kernel, 1: user process. */
 
 /* Page fault handler.  This is a skeleton that must be filled in
-   to implement virtual memory.
+   to implement virtual memory.  Some solutions to project 2 may
+   also require modifying this code.
 
    At entry, the address that faulted is in CR2 (Control Register
    2) and information about the fault, formatted as described in
@@ -136,7 +137,7 @@ page_fault (struct intr_frame *f)
   /* To implement virtual memory, delete the rest of the function
      body, and replace it with code that brings in the page to
      which fault_addr refers. */
-  printk ("Page fault at %08"PRIx32": %s error %s page in %s context.\n",
+  printf ("Page fault at %08"PRIx32": %s error %s page in %s context.\n",
           fault_addr,
           not_present ? "not present" : "rights violation",
           write ? "writing" : "reading",