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# Makefile for elf subdirectory of GNU C Library.
# Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB. If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
subdir := elf
headers = elf.h bits/elfclass.h bits/dlfcn.h link.h dlfcn.h
routines = $(dl-routines) dl-open dl-close dl-symbol dl-support \
dl-addr enbl-secure
# The core dynamic linking functions are in libc for the static and
# profiled libraries.
dl-routines = $(addprefix dl-,load cache lookup object reloc deps \
runtime error init fini debug misc \
version profile)
# But they are absent from the shared libc, because that code is in ld.so.
elide-routines.os = $(dl-routines) dl-support enbl-secure
# ld.so uses those routines, plus some special stuff for being the program
# interpreter and operating independent of libc.
rtld-routines := rtld $(dl-routines) dl-sysdep dl-minimal
ld-map = $(libc-map)
distribute = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
dl-hash.h soinit.c sofini.c ldd.sh.in ldd.bash.in eval.c \
genrtldtbl.awk atomicity.h dl-procinfo.h
extra-libs = libdl
extra-libs-others = $(extra-libs)
libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr
libdl-map := libdl.map
before-compile = $(objpfx)trusted-dirs.h $(objpfx)rtldtbl.h
all: # Make this the default target; it will be defined in Rules.
include ../Makeconfig
ifeq (yes,$(build-shared))
extra-objs = $(rtld-routines:=.os) soinit.os sofini.os eval.os
generated = librtld.os dl-allobjs.os ld.so trusted-dirs.h rtldtbl.h
install-others = $(inst_slibdir)/$(rtld-installed-name)
install-bin = ldd
generated += ldd
endif
others = sprof
install-bin = sprof
ifeq (yes,$(has-ldconfig))
others-static += ldconfig
others += ldconfig
install-rootsbin = ldconfig
endif
include ../Rules
ifeq (yes,$(build-shared))
# Make sure these things are built in the `make lib' pass so they can be used
# to run programs during the `make others' pass.
lib-noranlib: $(objpfx)$(rtld-installed-name) \
$(addprefix $(objpfx),$(extra-objs))
endif
# Command to link into a larger single relocatable object.
reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
$(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
$(reloc-link) $^
# Link together the dynamic linker into a single relocatable object.
$(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
$(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
# Do we need a linker script?
rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
ifneq (,$(rtld-ldscript-in))
rtld-ldscript = $(objpfx)rtld-ldscript
generated += rtld-ldscript
LDFLAGS-rtld = -T $(rtld-ldscript)
before-compile += $(rtld-ldscript)
rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
include $(rtld-parms)
$(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
-e 's#@@rtld-arch@@#$(rtld-arch)#' \
-e 's#@@rtld-entry@@#$(rtld-entry)#' \
-e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
endif
$(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript))
$(rtld-link) -Wl,-soname=$(rtld-installed-name)
define rtld-link
$(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
-Wl,-rpath=$(default-rpath) $(LDFLAGS-rtld) \
$(filter-out $(rtld-ldscript) $($(@F:.so=)-map),$^) \
$(load-map-file:%=-Wl,--version-script=%)
endef
# The dl code in the static libc needs a default library path.
CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
ifneq (ld.so,$(rtld-installed-name))
# Make sure ld.so.1 exists in the build directory so we can link
# against it.
$(objpfx)$(rtld-installed-name): $(objpfx)ld.so
rm -f $@
ln -s $(<F) $@
generated += $(rtld-installed-name)
endif
# Build a file mentioning all trustworthy directories to look for shared
# libraries when using LD_LIBRARY_PATH in a setuid program. The user can
# add directories to the list by defining $(user-defined-trusted-dirs)
# before starting make.
$(objpfx)trusted-dirs.h: Makefile
$(make-target-directory)
(for dir in `echo "$(default-rpath) $(user-defined-trusted-dirs)" | \
sed 's/:/ /g'`; do \
echo " \"$$dir\","; \
done;) > $@T
mv -f $@T $@
$(objpfx)rtldtbl.h: Makefile
$(make-target-directory)
echo "$(default-rpath)" | awk -f genrtldtbl.awk > $@T
mv -f $@T $@
CPPFLAGS-dl-load.c = -I$(objdir)/$(subdir)
CFLAGS-dl-load.c += -Wno-uninitialized
# Specify the dependencies of libdl.so; its commands come from the generic
# rule to build a shared library.
$(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
$(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so
$(do-install-program)
$(inst_slibdir)/$(rtld-installed-name): \
$(inst_slibdir)/$(rtld-version-installed-name)
$(make-shlib-link)
# Special target called by parent to install just the dynamic linker.
.PHONY: ldso_install
ldso_install: $(inst_slibdir)/$(rtld-installed-name)
ifneq ($(have-bash2),yes)
$(objpfx)ldd: ldd.sh.in $(common-objpfx)version.mk \
$(common-objpfx)soversions.mk $(common-objpfx)config.make
sed -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
-e 's%@VERSION@%$(version)%g' < $< > $@.new
chmod 555 $@.new
mv -f $@.new $@
else
$(objpfx)ldd: ldd.bash.in $(common-objpfx)version.mk \
$(common-objpfx)soversions.mk $(common-objpfx)config.make
sed -e 's%@BASH@%$(BASH)%g' \
-e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
-e 's%@VERSION@%$(version)%g' \
-e 's%@TEXTDOMAINDIR@%$(localedir)%g' < $< > $@.new
chmod 555 $@.new
mv -f $@.new $@
endif
ifeq ($(build-shared),yes)
$(objpfx)sprof: $(objpfx)libdl.so$(libdl.so-version)
else
$(objpfx)sprof: $(objpfx)libdl.a
endif
# muwahaha
LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
$(objpfx)libdl.so: $(objpfx)eval.os
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