elf/Makefile

   1 # Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Library General Public License as
   6 # published by the Free Software Foundation; either version 2 of the
   7 # License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Library General Public License for more details.
  13
  14 # You should have received a copy of the GNU Library General Public
  15 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 # Boston, MA 02111-1307, USA.
  18
  19 # Makefile for elf subdirectory of GNU C Library.
  20
  21 subdir          := elf
  22
  23 headers         = elf.h bits/elfclass.h bits/dlfcn.h link.h dlfcn.h
  24 routines        = $(dl-routines) dl-open dl-close dl-symbol dl-support \
  25                   dl-addr enbl-secure dl-profstub
  26
  27 # The core dynamic linking functions are in libc for the static and
  28 # profiled libraries.
  29 dl-routines     = $(addprefix dl-,load cache lookup object reloc deps \
  30                                   runtime error init fini debug misc \
  31                                   version profile)
  32 # But they are absent from the shared libc, because that code is in ld.so.
  33 elide-routines.os = $(dl-routines) dl-support enbl-secure
  34
  35 # ld.so uses those routines, plus some special stuff for being the program
  36 # interpreter and operating independent of libc.
  37 rtld-routines   := rtld $(dl-routines) dl-sysdep dl-environ dl-minimal
  38 distribute      = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
  39                   dl-hash.h soinit.c sofini.c ldd.sh.in ldd.bash.in eval.c \
  40                   genrtldtbl.awk atomicity.h dl-procinfo.h ldsodefs.h \
  41                   dl-librecon.h interp.c sln.c
  42
  43 extra-libs       = libdl
  44 extra-libs-others = $(extra-libs)
  45 libdl-routines  := dlopen dlclose dlsym dlvsym dlerror dladdr
  46
  47 before-compile = $(objpfx)trusted-dirs.h
  48
  49
  50 all: # Make this the default target; it will be defined in Rules.
  51
  52 include ../Makeconfig
  53
  54 ifeq ($(versioning),yes)
  55 ld-map          = $(common-objpfx)libc.map
  56 endif
  57
  58 ifeq (yes,$(build-shared))
  59 extra-objs      = $(rtld-routines:=.os) soinit.os sofini.os eval.os interp.os
  60 generated       = librtld.os dl-allobjs.os ld.so trusted-dirs.h trusted-dirs.st
  61 install-others  = $(inst_slibdir)/$(rtld-installed-name)
  62 install-bin     = ldd
  63 generated      += ldd
  64 endif
  65
  66 others          = sprof sln
  67 install-bin     += sprof
  68 others-static   = sln
  69 install-rootsbin = sln
  70
  71 ifeq (yes,$(has-ldconfig))
  72 others-static   += ldconfig
  73 others          += ldconfig
  74 install-rootsbin += ldconfig
  75 endif
  76
  77 include ../Rules
  78
  79
  80 ifeq (yes,$(build-shared))
  81 # Make sure these things are built in the `make lib' pass so they can be used
  82 # to run programs during the `make others' pass.
  83 lib-noranlib: $(objpfx)$(rtld-installed-name) \
  84               $(addprefix $(objpfx),$(extra-objs))
  85 endif
  86
  87 # Command to link into a larger single relocatable object.
  88 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
  89
  90 $(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
  91         $(reloc-link) $^
  92
  93 # Link together the dynamic linker into a single relocatable object.
  94 $(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
  95         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
  96
  97 # Do we need a linker script?
  98 rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
  99
 100 ifneq (,$(rtld-ldscript-in))
 101 rtld-ldscript = $(objpfx)rtld-ldscript
 102 generated += rtld-ldscript
 103
 104 LDFLAGS-rtld = -T $(rtld-ldscript)
 105 before-compile += $(rtld-ldscript)
 106
 107 rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
 108 include $(rtld-parms)
 109
 110 $(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
 111         sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
 112             -e 's#@@rtld-arch@@#$(rtld-arch)#' \
 113             -e 's#@@rtld-entry@@#$(rtld-entry)#' \
 114             -e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
 115 endif
 116
 117 $(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript)) \
 118                 $(ld-map)
 119         $(LINK.o) -nostdlib -nostartfiles -shared -o $@         \
 120                 -Wl,-rpath=$(default-rpath) $(LDFLAGS-rtld)     \
 121                 $(filter-out $(rtld-ldscript) $(map-file),$^)   \
 122                 $(load-map-file) -Wl,-soname=$(rtld-installed-name)
 123
 124 # The dl code in the static libc needs a default library path.
 125 CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
 126
 127 # interp.c exists just to get this string into the libraries.
 128 CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"'
 129
 130 ifneq (ld.so,$(rtld-installed-name))
 131 # Make sure ld.so.1 exists in the build directory so we can link
 132 # against it.
 133 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 134         rm -f $@
 135         ln -s $(<F) $@
 136 generated += $(rtld-installed-name)
 137 endif
 138
 139 # Build a file mentioning all trustworthy directories to look for shared
 140 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 141 # add directories to the list by defining $(user-defined-trusted-dirs)
 142 # before starting make.
 143 $(objpfx)trusted-dirs.h: $(objpfx)trusted-dirs.st; @:
 144 $(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig
 145         $(make-target-directory)
 146         dirs="$(subst :, ,$(default-rpath) $(user-defined-trusted-dirs))";   \
 147         for dir in $$dirs; do                                                \
 148           echo "  \"$$dir/\",";                                              \
 149         done > ${@:st=T}
 150         $(move-if-change) ${@:st=T} ${@:st=h}
 151         touch $@
 152 CPPFLAGS-dl-load.c = -I$(objpfx).
 153 CFLAGS-dl-load.c += -Wno-uninitialized
 154
 155 # Specify the dependencies of libdl.so; its commands come from the generic
 156 # rule to build a shared library.
 157 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
 158
 159 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force)
 160         $(do-install-program)
 161
 162 $(inst_slibdir)/$(rtld-installed-name): \
 163   $(inst_slibdir)/$(rtld-version-installed-name)
 164         $(make-shlib-link)
 165
 166 # Special target called by parent to install just the dynamic linker.
 167 .PHONY: ldso_install
 168 ldso_install: $(inst_slibdir)/$(rtld-installed-name)
 169
 170
 171 common-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 172                      -e 's%@VERSION@%$(version)%g'
 173 sh-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%/bin/sh%g;s/\$$"/"/g'
 174 bash-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
 175                    -e 's%@TEXTDOMAINDIR@%$(localedir)%g'
 176
 177 ifneq ($(have-bash2),yes)
 178 ldd-shell = sh
 179 else
 180 ldd-shell = bash
 181 endif
 182
 183 ifeq ($(ldd-rewrite-script),no)
 184 define gen-ldd
 185 sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
 186 endef
 187 else
 188 define gen-ldd
 189 sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
 190 endef
 191 endif
 192
 193 $(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
 194               $(common-objpfx)config.make
 195         $(gen-ldd)
 196         chmod 555 $@.new
 197         mv -f $@.new $@
 198
 199
 200 ifeq ($(build-shared),yes)
 201 $(objpfx)sprof: $(objpfx)libdl.so$(libdl.so-version)
 202 else
 203 $(objpfx)sprof: $(objpfx)libdl.a
 204 endif
 205 \f
 206 # muwahaha
 207
 208 LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
 209 $(objpfx)libdl.so: $(objpfx)eval.os