--- solx86_mmap.c	1996/12/23 06:51:19	3.1
+++ xc/programs/Xserver/hw/xfree86/os-support/solx86/solx86_mmap.c	2000/02/08 20:32:10	3.1.2.1
@@ -43,6 +43,8 @@
 	int fd;
 	unsigned char *ptr;
 	char	solx86_vtname[10];
+	int mlen;
+	int psize = 4096;	/* XXX x86 only */
 
 	/*
      	 * Solaris 2.1 x86 SVR4 (10/27/93)
@@ -56,8 +58,9 @@
         	ErrorF("xf86ReadBios: Failed to open %s (%s)\n", solx86_vtname,
                		strerror(errno));
         	return(-1);
-	}	
-	ptr = mmap((caddr_t)0, 0x8000, PROT_READ, MAP_SHARED, fd, (off_t)Base);
+	}
+	mlen = (Offset + Len + psize - 1) & ~psize;
+	ptr = mmap((caddr_t)0, mlen, PROT_READ, MAP_SHARED, fd, (off_t)Base);
 	if ((int)ptr == -1)
 	{
 		ErrorF("xf86ReadBios: %s mmap failed\n", solx86_vtname);
@@ -65,7 +68,7 @@
 		return(-1);
 	}
 	(void)memcpy(Buf, (void *)(ptr + Offset), Len);
-	(void)munmap((caddr_t)ptr, 0x8000);
+	(void)munmap((caddr_t)ptr, mlen);
 	(void)close(fd);
 	return(Len);
 }
--- bios_V4mmap.c	1996/12/23 06:51:24	3.4
+++ xc/programs/Xserver/hw/xfree86/os-support/sysv/bios_V4mmap.c	2000/02/08 20:32:11	3.4.2.1
@@ -42,6 +42,8 @@
 {
 	int fd;
 	unsigned char *ptr;
+	int mlen;
+	int psize = 4096;	/* XXX x86 only */
 
 	if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
 	{
@@ -49,7 +51,8 @@
 		       strerror(errno));
 		return(-1);
 	}
-	ptr = (unsigned char *)mmap((caddr_t)0, 0x8000, PROT_READ, MAP_SHARED,
+	mlen = (Offset + Len + psize - 1) & ~psize;
+	ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ, MAP_SHARED,
 				    fd, (off_t)Base);
 	if ((int)ptr == -1)
 	{
@@ -58,7 +61,7 @@
 		return(-1);
 	}
 	(void)memcpy(Buf, (void *)(ptr + Offset), Len);
-	(void)munmap((caddr_t)ptr, 0x8000);
+	(void)munmap((caddr_t)ptr, mlen);
 	(void)close(fd);
 	return(Len);
 }