1# 2# Copyright 2009 Sun Microsystems, Inc. All rights reserved. 3# Use is subject to license terms. 4# 5# CDDL HEADER START 6# 7# The contents of this file are subject to the terms of the 8# Common Development and Distribution License (the "License"). 9# You may not use this file except in compliance with the License. 10# 11# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 12# or http://www.opensolaris.org/os/licensing. 13# See the License for the specific language governing permissions 14# and limitations under the License. 15# 16# When distributing Covered Code, include this CDDL HEADER in each 17# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 18# If applicable, add the following below this CDDL HEADER, with the 19# fields enclosed by brackets "[]" replaced with your own identifying 20# information: Portions Copyright [yyyy] [name of copyright owner] 21# 22# CDDL HEADER END 23# 24# Link-editor mapfile to create a non-executable bss segment definition 25# within an executable. This mapfile is similar to map.noexdata that 26# can be used on x86 architectures to create a non-executable data 27# segment. On SPARC, the data segment contains a Procedure Linkage 28# Table (PLT) that must remain executable. 29# 30# As the bss segment is extended by sbrk(2) to enlarge the heap, a 31# non-executable bss segment also results in a non-exutable heap. 32# 33# The link-editor does not use this file automatically, so one must 34# use the -M option to cc or ld: 35# 36# cc -M /usr/lib/ld/map.noexbss myprogram.c 37# 38bss = ?RW; 39 40# See also /usr/lib/ld/map.noexdata. 41