--- Net2/arch/i386/include/segments.h	2018/04/24 18:04:01	1.1.1.1
+++ Net2/arch/i386/include/segments.h	2018/04/24 18:12:30	1.1.1.2
@@ -42,6 +42,10 @@
  *	William F. Jolitz (william@ernie.berkeley.edu) 6/20/1989
  */
 
+#if __GNUC__ >= 2
+#pragma pack(1)
+#endif
+
 /*
  * Selectors
  */
@@ -92,7 +96,6 @@ union	descriptor	{
 	struct	segment_descriptor sd;
 	struct	gate_descriptor gd;
 };
-#define	d_type	gd.gd_type
 
 	/* system segments and gate types */
 #define	SDT_SYSNULL	 0	/* system null */
@@ -172,11 +175,11 @@ extern ssdtosd() ;	/* to decode a ssd */
 extern sdtossd() ;	/* to encode a sd */
 
 /*
- * region descriptors, used to load gdt/idt tables before segments yet exist
+ * region descriptors, used to load gdt/idt tables before segments yet exist.
  */
 struct region_descriptor {
-	unsigned rd_limit:16 ;		/* segment extent */
-	char *rd_base;			/* base address  */
+	unsigned rd_limit:16;		/* segment extent */
+	unsigned rd_base:32;		/* base address  */
 };
 
 /*
@@ -188,3 +191,14 @@ struct region_descriptor {
 #define	SEGEX_TI	0x04	/* local descriptor table */
 				/* other bits are affected descriptor index */
 #define SEGEX_IDX(s)	((s)>>3)&0x1fff)
+
+/*
+ * Size of IDT table
+ */
+
+#define	NIDT	256
+#define	NRSVIDT	32		/* reserved entries for cpu exceptions */
+
+#if __GNUC__ >= 2
+#pragma pack(4)
+#endif