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# A default mapfile for optimizing the creation of a filter shared object. 25# Creates a single, read-only, executable text segment to catch all loadable 26# sections. 27# 28# Filters that consist solely of a symbol table can be built directly from 29# ld(1) so that no .init/.fini sections are created. Although the filter can 30# be constructed as a single read-only segment, the execute attribute of the 31# segment is maintained to allow for simple .init processing (i.e., .init 32# processing that requires no relocations), and to accommodate older versions 33# of dbx that produce warning messages if they find objects without traditional 34# text segments. 35# 36# If a filter is required to execute .init code that references global data 37# then the filter will require relocation (i.e., it will have to be written to 38# by ld.so.1). Filters of this sort should *not* use this mapfile. 39# 40# This compaction of a filter into a single segment allows ld.so.1 to optimize 41# its processing of a filter. If the filter is small enough this segment may 42# be handled in a single page mapping (for example libdl.so.1). 43# 44# The assignment of all allocatable sections to this segment insures that the 45# .dynamic, and any .data or .bss sections, become part of the text. Note that 46# the compiler has a habit of generating empty .data and .bss sections. 47# 48# Override the default alignment so that this single paged object can be mapped 49# more flexibly. 50 51filter = LOAD ?RX A0x1000; 52filter : ?A; 53