X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fuserprog%2Fexception.h;h=f83e615bb1e010c8723510a99abb01d714c0f275;hb=eb5c6a0f64ab2b0a9efa853fa0ef53822af80047;hp=e37841018f6a72cb87687225dcd3f7f26280319d;hpb=6916b246f3be8c72d6e77fd98c4a1447fd2c1de7;p=pintos-anon

diff --git a/src/userprog/exception.h b/src/userprog/exception.h
index e378410..f83e615 100644
--- a/src/userprog/exception.h
+++ b/src/userprog/exception.h
@@ -1,6 +1,12 @@
 #ifndef USERPROG_EXCEPTION_H
 #define USERPROG_EXCEPTION_H
 
+/* Page fault error code bits that describe the cause of the exception.  */
+#define PF_P 0x1    /* 0: not-present page. 1: access rights violation. */
+#define PF_W 0x2    /* 0: read, 1: write. */
+#define PF_U 0x4    /* 0: kernel, 1: user process. */
+
 void exception_init (void);
+void exception_print_stats (void);
 
 #endif /* userprog/exception.h */