Index: sys/arch/virt68k/include/vmparam.h
===================================================================
RCS file: /cvsroot/src/sys/arch/virt68k/include/vmparam.h,v
retrieving revision 1.3
diff -p -u -r1.3 vmparam.h
--- sys/arch/virt68k/include/vmparam.h	8 Feb 2025 23:44:53 -0000	1.3
+++ sys/arch/virt68k/include/vmparam.h	20 Jun 2025 12:21:00 -0000
@@ -52,16 +52,8 @@
 
 /*
  * USRSTACK is the top (end) of the user stack.
- *
- * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
- * is for HPUX compatibility.  Why??  Because HPUX's debuggers
- * have the user's stack hard-wired at FFF00000 for post-mortems,
- * and we must be compatible...
- */
-#define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
-#define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
-#define	P1PAGES		0x100000
-#define	HIGHPAGES	(0x100000/PAGE_SIZE)
+ */
+#define	USRSTACK	VM_MAXUSER_ADDRESS
 
 /*
  * Virtual memory related constants, all in bytes
@@ -73,13 +65,13 @@
 #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
 #endif
 #ifndef MAXDSIZ
-#define	MAXDSIZ		(64*1024*1024)		/* max data size */
+#define	MAXDSIZ		(128*1024*1024)		/* max data size */
 #endif
 #ifndef	DFLSSIZ
 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
 #endif
 #ifndef	MAXSSIZ
-#define	MAXSSIZ		MAXDSIZ			/* max stack size */
+#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
 #endif
 
 /*
@@ -102,8 +94,8 @@
  * room for the Sysmap, because that's where the Hibler pmap puts it).
  */
 #define VM_MIN_ADDRESS		((vaddr_t)0)
-#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
-#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
+#define VM_MAXUSER_ADDRESS	((vaddr_t)0x1E000000)
+#define VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0xFF000000-PAGE_SIZE*NPTEPG))