elf/Makefile

   1 # Copyright (C) 1995-1999, 2000 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 link.h
  24 routines        = $(dl-routines) dl-open dl-close dl-symbol dl-support \
  25                   dl-addr enbl-secure dl-profstub dl-origin dl-libc dl-sym
  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-cache.h dl-hash.h soinit.c sofini.c ldd.bash.in \
  40                    genrtldtbl.awk atomicity.h dl-procinfo.h ldsodefs.h \
  41                    dl-librecon.h interp.c sln.c dl-dst.h hp-timing.h \
  42                    do-lookup.h dl-lookupcfg.h sprof.c gen-trusted-dirs.awk \
  43                    testobj1.c testobj2.c testobj3.c testobj4.c testobj5.c \
  44                    testobj6.c testobj1_1.c failobj.c \
  45                    ldconfig.h ldconfig.c cache.c readlib.c readelflib.c \
  46                    dep1.c dep2.c dep3.c dep4.c
  47
  48 include ../Makeconfig
  49
  50 before-compile = $(objpfx)trusted-dirs.h
  51
  52 ifeq ($(versioning),yes)
  53 ld-map          = $(common-objpfx)ld.map
  54 endif
  55
  56 ifeq (yes,$(build-shared))
  57 extra-objs      = $(rtld-routines:=.os) soinit.os sofini.os interp.os
  58 generated       = librtld.os dl-allobjs.os ld.so trusted-dirs.h trusted-dirs.st
  59 install-others  = $(inst_slibdir)/$(rtld-installed-name)
  60 install-bin     = ldd
  61 generated      += ldd
  62 endif
  63
  64 others          = sprof sln
  65 install-bin     += sprof
  66 others-static   = sln
  67 install-rootsbin = sln
  68
  69 ifeq (yes,$(use-ldconfig))
  70 others-static   += ldconfig
  71 others          += ldconfig
  72 install-rootsbin += ldconfig
  73
  74 ldconfig-modules := cache readlib xmalloc xstrdup
  75 extra-objs      += $(ldconfig-modules:=.o)
  76
  77 # To find xmalloc.c and xstrdup.c
  78 vpath %.c ../locale/programs
  79
  80 endif
  81
  82 ifeq (yes,$(build-shared))
  83 tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
  84         constload1 order $(tests-vis-$(have-protected))
  85 tests-vis-yes = vismain
  86 endif
  87 modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
  88                 testobj1_1 failobj constload2 constload3 \
  89                 dep1 dep2 dep3 dep4 $(modules-vis-$(have-protected))
  90 modules-vis-yes = vismod1 vismod2 vismod3
  91 extra-objs += $(modules-names:=.os)
  92
  93 include ../Rules
  94
  95 ifeq (yes,$(build-shared))
  96 # Make sure these things are built in the `make lib' pass so they can be used
  97 # to run programs during the `make others' pass.
  98 lib-noranlib: $(objpfx)$(rtld-installed-name) \
  99               $(addprefix $(objpfx),$(extra-objs))
 100 endif
 101
 102 # Command to link into a larger single relocatable object.
 103 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
 104
 105 $(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
 106         $(reloc-link) $^
 107
 108 # Link together the dynamic linker into a single relocatable object.
 109 $(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
 110         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
 111
 112 # Do we need a linker script?
 113 rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
 114
 115 ifneq (,$(rtld-ldscript-in))
 116 rtld-ldscript = $(objpfx)rtld-ldscript
 117 generated += rtld-ldscript
 118
 119 LDFLAGS-rtld = -T $(rtld-ldscript)
 120 before-compile += $(rtld-ldscript)
 121
 122 rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
 123 include $(rtld-parms)
 124
 125 $(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
 126         sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
 127             -e 's#@@rtld-arch@@#$(rtld-arch)#' \
 128             -e 's#@@rtld-entry@@#$(rtld-entry)#' \
 129             -e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
 130 endif
 131
 132 $(objpfx)ld.so: $(objpfx)librtld.os $(rtld-ldscript) $(ld-map)
 133         $(LINK.o) -nostdlib -nostartfiles -shared -o $@ $(LDFLAGS-rtld) \
 134                   $(filter-out $(rtld-ldscript) $(map-file),$^)         \
 135                   $(load-map-file) -Wl,-soname=$(rtld-installed-name)
 136
 137 # interp.c exists just to get this string into the libraries.
 138 CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"'
 139
 140 ifneq (ld.so,$(rtld-installed-name))
 141 # Make sure ld.so.1 exists in the build directory so we can link
 142 # against it.
 143 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 144         rm -f $@
 145         ln -s $(<F) $@
 146 generated += $(rtld-installed-name)
 147 endif
 148
 149 # Build a file mentioning all trustworthy directories to look for shared
 150 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 151 # add directories to the list by defining $(user-defined-trusted-dirs)
 152 # before starting make.
 153 $(objpfx)trusted-dirs.h: $(objpfx)trusted-dirs.st; @:
 154 $(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig
 155         $(make-target-directory)
 156         echo "$(subst :, ,$(default-rpath) $(user-defined-trusted-dirs))"    \
 157         | $(AWK) -f gen-trusted-dirs.awk > ${@:st=T};
 158         $(move-if-change) ${@:st=T} ${@:st=h}
 159         touch $@
 160 CPPFLAGS-dl-load.c = -I$(objpfx).
 161
 162 ifeq (yes,$(build-shared))
 163 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force)
 164         $(make-target-directory)
 165         $(INSTALL_PROGRAM) $< $@.new
 166
 167 $(inst_slibdir)/$(rtld-installed-name): \
 168   $(inst_slibdir)/$(rtld-version-installed-name) \
 169   $(inst_slibdir)/libc-$(version).so
 170         rm -f $@ $<
 171         $(symbolic-link-prog) $<.new $@
 172         ln $<.new $<
 173         rm -f $@
 174         $(symbolic-link-prog) $(<F) $@
 175         rm -f $<.new
 176
 177 # Special target called by parent to install just the dynamic linker.
 178 .PHONY: ldso_install
 179 ldso_install: $(inst_slibdir)/$(rtld-installed-name)
 180 endif
 181
 182
 183 common-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 184                      -e 's%@VERSION@%$(version)%g'
 185 sh-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%/bin/sh%g;s/\$$"/"/g'
 186 bash-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
 187                    -e 's%@TEXTDOMAINDIR@%$(msgcatdir)%g'
 188
 189 ifneq ($(have-bash2),yes)
 190 ldd-shell = sh
 191 else
 192 ldd-shell = bash
 193 endif
 194
 195 ifeq ($(ldd-rewrite-script),no)
 196 define gen-ldd
 197 sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
 198 endef
 199 else
 200 define gen-ldd
 201 sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
 202 endef
 203 endif
 204
 205 $(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
 206               $(common-objpfx)config.make
 207         $(gen-ldd)
 208         chmod 555 $@.new
 209         mv -f $@.new $@
 210
 211 $(objpfx)sprof: $(libdl)
 212
 213 $(objpfx)ldconfig: $(ldconfig-modules:%=$(objpfx)%.o)
 214
 215 test-modules = $(addprefix $(objpfx),$(addsuffix .so,$(modules-names)))
 216 generated += $(addsuffix .so,$(modules-names))
 217
 218 $(objpfx)testobj1.so: $(libdl)
 219 $(objpfx)testobj1_1.so: $(objpfx)testobj1.so $(libdl)
 220 $(objpfx)testobj2.so: $(objpfx)testobj1.so $(libdl)
 221 $(objpfx)testobj3.so: $(libdl)
 222 $(objpfx)testobj4.so: $(libdl)
 223 $(objpfx)testobj5.so: $(libdl)
 224 $(objpfx)testobj6.so: $(libdl)
 225 $(objpfx)failobj.so: $(objpfx)testobj6.so
 226 $(objpfx)dep1.so: $(objpfx)dep2.so $(objpfx)dep4.so
 227 $(objpfx)dep2.so: $(objpfx)dep3.so $(objpfx)dep4.so
 228 $(objpfx)dep4.so: $(objpfx)dep3.so
 229
 230 $(test-modules): $(objpfx)%.so: $(objpfx)%.os
 231         $(build-module)
 232
 233 $(objpfx)loadtest: $(libdl)
 234 LDFLAGS-loadtest = -rdynamic
 235
 236 $(objpfx)loadtest.out: $(test-modules)
 237
 238 $(objpfx)restest1: $(objpfx)testobj1.so $(objpfx)testobj1_1.so $(libdl)
 239 LDFLAGS-restest1 = -rdynamic
 240
 241 $(objpfx)restest1.out: $(test-modules)
 242
 243 preloadtest-preloads = testobj1 testobj2 testobj3 testobj4 testobj5
 244 $(objpfx)preloadtest: $(objpfx)testobj6.so
 245 LDFLAGS-preloadtest = -rdynamic
 246 $(objpfx)preloadtest.out: $(preloadtest-preloads:%=$(objpfx)%.so)
 247 preloadtest-ENV = \
 248   LD_PRELOAD=$(subst $(empty) ,:,$(strip $(preloadtest-preloads:=.so)))
 249
 250 $(objpfx)loadfail: $(libdl)
 251 LDFLAGS-loadfail = -rdynamic
 252
 253 $(objpfx)loadfail.out: $(objpfx)failobj.so
 254
 255 $(objpfx)multiload: $(libdl)
 256 LDFLAGS-multiload = -rdynamic
 257 CFLAGS-multiload.c = -DOBJDIR=\"$(elf-objpfx)\"
 258
 259 $(objpfx)multiload.out: $(objpfx)testobj1.so
 260
 261 $(objpfx)origtest: $(libdl)
 262 $(objpfx)origtest.out: $(objpfx)testobj1.so
 263
 264 ifeq ($(have-thread-library),yes)
 265 $(objpfx)resolvfail: $(libdl) $(shared-thread-library)
 266 else
 267 $(objpfx)resolvfail: $(libdl)
 268 endif
 269
 270 $(objpfx)constload1: $(libdl)
 271 $(objpfx)constload1.out: $(objpfx)constload2.so $(objpfx)constload3.so
 272
 273 $(objpfx)order: $(addprefix $(objpfx),dep4.so dep3.so dep2.so dep1.so)
 274
 275 $(objpfx)order.out: $(objpfx)order
 276         $(elf-objpfx)$(rtld-installed-name) \
 277           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
 278           $(objpfx)order > $@
 279         (echo "0123456789" | cmp $@ -) > /dev/null
 280
 281 $(objpfx)vismain: $(addprefix $(objpfx),vismod1.so vismod2.so)
 282 $(objpfx)vismain.out: $(addprefix $(objpfx),vismod3.so)
 283 vismain-ENV = LD_PRELOAD=$(addprefix $(objpfx),vismod3.so)