1# 2# CDDL HEADER START 3# 4# The contents of this file are subject to the terms of the 5# Common Development and Distribution License (the "License"). 6# You may not use this file except in compliance with the License. 7# 8# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9# or http://www.opensolaris.org/os/licensing. 10# See the License for the specific language governing permissions 11# and limitations under the License. 12# 13# When distributing Covered Code, include this CDDL HEADER in each 14# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15# If applicable, add the following below this CDDL HEADER, with the 16# fields enclosed by brackets "[]" replaced with your own identifying 17# information: Portions Copyright [yyyy] [name of copyright owner] 18# 19# CDDL HEADER END 20# 21 22# 23# Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24# Use is subject to license terms. 25# Copyright 2015 Igor Kozhukhov <ikozhukhov@gmail.com> 26# 27 28include $(SRC)/Makefile.master 29 30FILES= \ 31 $(MACH)_cc_map.noexeglobs \ 32 $(MACH)_gcc_map.noexeglobs 33 34$(BUILD64)FILES += \ 35 $(MACH64)_cc_map.noexeglobs \ 36 $(MACH64)_gcc_map.noexeglobs 37 38SYMS1= syms.1 39SYMS2= syms.2 40MAIN1= main.1 41MAIN2= main.2 42 43TEMPLATE1= map.noexeglobs.1.template 44TEMPLATE2= map.noexeglobs.2.template 45 46all install: $(FILES) 47 48lint: 49 50clean: 51 $(RM) $(SYMS1) $(SYMS2) $(MAIN1) $(MAIN2) 52 53clobber: clean 54 $(RM) $(FILES) 55 56# A number of dynamic executables have their own definitions of interfaces that 57# exist in system libraries. To prevent name-space pollution it is desirable 58# to demote the interfaces within these executable to locals. However, various 59# symbols defined by the compiler drivers crt/values files need to remain 60# global in any dynamic object that includes these files. These symbols 61# interpose on symbols in libc, or provide call backs for other system 62# libraries. The various compiler drivers (cc and gcc), and the crt/values 63# files that these drivers are configured to include, differ between the 64# various compilations environments (platform, 32/64-bit). Therefore, the 65# only means of creating a mapfile to demote symbols is to dynamically generate 66# the mapfile for a specific compilation environment. 67# 68# Here, template mapfiles are used to generate a number of compilation specific 69# mapfiles. These mapfiles are referenced by components of the build through 70# the MAPFILE.NGB macro defined in Makefile.master. These dynamically created 71# mapfiles are not delivered into the $ROOT area, and therefore are not 72# delivered as packaged components of the OSNet. 73 74$(MACH)_cc_map.noexeglobs := LINK = $(LINK.c) 75$(MACH64)_cc_map.noexeglobs := LINK = $(LINK64.c) 76 77$(MACH)_gcc_map.noexeglobs := CC = $(ONBLD_TOOLS)/bin/$(MACH)/cw -_gcc 78$(MACH)_gcc_map.noexeglobs := LINK = $(LINK.c) 79$(MACH64)_gcc_map.noexeglobs := CC = $(ONBLD_TOOLS)/bin/$(MACH)/cw -_gcc 80$(MACH64)_gcc_map.noexeglobs := LINK = $(LINK64.c) 81 82# This generic target creates two dynamic executables from an empty "main" 83# program. These objects are not executed, but are analyzed to determine the 84# global symbols each provides. 85# 86# The first executable demotes a family of known interfaces to local and allows 87# all other symbol definitions to remain global. This executables provides the 88# base for discovering all symbol definitions provided by the various 89# compilation environments. The second executable demotes all symbols to 90# locals. Within both executables, some symbols remain globals (_end, _etext, 91# etc.) as the link-editor has special knowledge of these symbols and their 92# expected visibility requirements. By inspecting the deferences between the 93# global symbols within the two executables, a mapfile can be generated to 94# ensure the symbols defined by the compilation environments files remain 95# global. 96 97%map.noexeglobs:main.c $(TEMPLATE1) $(TEMPLATE2) 98 $(LINK) -o $(MAIN1) -M$(TEMPLATE1) main.c 99 $(ELFDUMP) -s -N.dynsym $(MAIN1) | $(EGREP) "WEAK|GLOB" | \ 100 $(GREP) -v UNDEF | $(AWK) '{print $$9 }' | $(SORT) > $(SYMS1) 101 $(LINK) -o $(MAIN2) -M$(TEMPLATE2) main.c 102 $(ELFDUMP) -s -N.dynsym $(MAIN2) | $(EGREP) "WEAK|GLOB" | \ 103 $(GREP) -v UNDEF | $(AWK) '{print $$9 }' | $(SORT) > $(SYMS2) 104 $(ECHO) "# GENERATED FILE - DO NOT EDIT" > $@ 105 $(GREP) MAP-HEAD $(TEMPLATE2) | \ 106 $(SED) -e "s/ *# MAP-HEAD//" >> $@ 107 $(DIFF) $(SYMS1) $(SYMS2) | $(GREP) "^<" | \ 108 $(SED) -e "s/^< \(.*\)/ \1;/" >> $@ 109 $(GREP) MAP-TAIL $(TEMPLATE2) | \ 110 $(SED) -e "s/ *# MAP-TAIL//" >> $@ 111 $(RM) $(SYMS1) $(SYMS2) $(MAIN1) $(MAIN2) 112