1# 2# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 3# 4# CDDL HEADER START 5# 6# The contents of this file are subject to the terms of the 7# Common Development and Distribution License (the "License"). 8# You may not use this file except in compliance with the License. 9# 10# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 11# or http://www.opensolaris.org/os/licensing. 12# See the License for the specific language governing permissions 13# and limitations under the License. 14# 15# When distributing Covered Code, include this CDDL HEADER in each 16# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 17# If applicable, add the following below this CDDL HEADER, with the 18# fields enclosed by brackets "[]" replaced with your own identifying 19# information: Portions Copyright [yyyy] [name of copyright owner] 20# 21# CDDL HEADER END 22# 23# Link-editor mapfile to create a non-executable bss segment definition 24# within an executable. This mapfile is similar to map.noexdata that 25# can be used on x86 architectures to create a non-executable data 26# segment. On SPARC, the data segment contains a Procedure Linkage 27# Table (PLT) that must remain executable. 28# 29# As the bss segment is extended by sbrk(2) to enlarge the heap, a 30# non-executable bss segment also results in a non-exutable heap. 31# 32# The link-editor does not use this file automatically, so one must 33# use the -M option to cc or ld: 34# 35# cc -M /usr/lib/ld/map.noexbss myprogram.c 36# 37 38$mapfile_version 2 39 40LOAD_SEGMENT bss { 41 FLAGS = READ WRITE; 42}; 43 44# See also /usr/lib/ld/map.noexdata. 45