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 dl-dtprocnum.h
  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,$(use-ldconfig))
  70 ifeq (yes,$(build-shared))
  71 others-static   += ldconfig
  72 others          += ldconfig
  73 install-rootsbin += ldconfig
  74
  75 ldconfig-modules := cache readlib xmalloc xstrdup
  76 extra-objs      += $(ldconfig-modules:=.o)
  77
  78 # To find xmalloc.c and xstrdup.c
  79 vpath %.c ../locale/programs
  80
  81 endif
  82 endif
  83
  84 ifeq (yes,$(build-shared))
  85 tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
  86         constload1 order $(tests-vis-$(have-protected))
  87 tests-vis-yes = vismain
  88 endif
  89 modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
  90                 testobj1_1 failobj constload2 constload3 \
  91                 dep1 dep2 dep3 dep4 $(modules-vis-$(have-protected))
  92 modules-vis-yes = vismod1 vismod2 vismod3
  93 extra-objs += $(addsuffix .os,$(strip $(modules-names)))
  94
  95 include ../Rules
  96
  97 ifeq (yes,$(build-shared))
  98 # Make sure these things are built in the `make lib' pass so they can be used
  99 # to run programs during the `make others' pass.
 100 lib-noranlib: $(objpfx)$(rtld-installed-name) \
 101               $(addprefix $(objpfx),$(extra-objs))
 102 endif
 103
 104 # Command to link into a larger single relocatable object.
 105 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
 106
 107 $(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
 108         $(reloc-link) $^
 109
 110 # Link together the dynamic linker into a single relocatable object.
 111 $(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
 112         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
 113
 114 # Do we need a linker script?
 115 rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
 116
 117 ifneq (,$(rtld-ldscript-in))
 118 rtld-ldscript = $(objpfx)rtld-ldscript
 119 generated += rtld-ldscript
 120
 121 LDFLAGS-rtld = -T $(rtld-ldscript)
 122 before-compile += $(rtld-ldscript)
 123
 124 rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
 125 include $(rtld-parms)
 126
 127 $(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
 128         sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
 129             -e 's#@@rtld-arch@@#$(rtld-arch)#' \
 130             -e 's#@@rtld-entry@@#$(rtld-entry)#' \
 131             -e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
 132 endif
 133
 134 $(objpfx)ld.so: $(objpfx)librtld.os $(rtld-ldscript) $(ld-map)
 135         $(LINK.o) -nostdlib -nostartfiles -shared -o $@ $(LDFLAGS-rtld) \
 136                   $(filter-out $(rtld-ldscript) $(map-file),$^)         \
 137                   $(load-map-file) -Wl,-soname=$(rtld-installed-name)
 138
 139 # interp.c exists just to get this string into the libraries.
 140 CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"'
 141
 142 ifneq (ld.so,$(rtld-installed-name))
 143 # Make sure ld.so.1 exists in the build directory so we can link
 144 # against it.
 145 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 146         rm -f $@
 147         ln -s $(<F) $@
 148 generated += $(rtld-installed-name)
 149 endif
 150
 151 # Build a file mentioning all trustworthy directories to look for shared
 152 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 153 # add directories to the list by defining $(user-defined-trusted-dirs)
 154 # before starting make.
 155 $(objpfx)trusted-dirs.h: $(objpfx)trusted-dirs.st; @:
 156 $(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig
 157         $(make-target-directory)
 158         echo "$(subst :, ,$(default-rpath) $(user-defined-trusted-dirs))"    \
 159         | $(AWK) -f gen-trusted-dirs.awk > ${@:st=T};
 160         $(move-if-change) ${@:st=T} ${@:st=h}
 161         touch $@
 162 CPPFLAGS-dl-load.c = -I$(objpfx).
 163
 164 ifeq (yes,$(build-shared))
 165 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force)
 166         $(make-target-directory)
 167         $(INSTALL_PROGRAM) $< $@.new
 168
 169 $(inst_slibdir)/$(rtld-installed-name): \
 170   $(inst_slibdir)/$(rtld-version-installed-name) \
 171   $(inst_slibdir)/libc-$(version).so
 172         rm -f $@ $<
 173         $(symbolic-link-prog) $<.new $@
 174         ln $<.new $<
 175         rm -f $@
 176         $(symbolic-link-prog) $(<F) $@
 177         rm -f $<.new
 178
 179 # Special target called by parent to install just the dynamic linker.
 180 .PHONY: ldso_install
 181 ldso_install: $(inst_slibdir)/$(rtld-installed-name)
 182 endif
 183
 184
 185 common-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 186                      -e 's%@VERSION@%$(version)%g'
 187 sh-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%/bin/sh%g;s/\$$"/"/g'
 188 bash-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
 189                    -e 's%@TEXTDOMAINDIR@%$(msgcatdir)%g'
 190
 191 ifneq ($(have-bash2),yes)
 192 ldd-shell = sh
 193 else
 194 ldd-shell = bash
 195 endif
 196
 197 ifeq ($(ldd-rewrite-script),no)
 198 define gen-ldd
 199 sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
 200 endef
 201 else
 202 define gen-ldd
 203 sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
 204 endef
 205 endif
 206
 207 $(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
 208               $(common-objpfx)config.make
 209         $(gen-ldd)
 210         chmod 555 $@.new
 211         mv -f $@.new $@
 212
 213 $(objpfx)sprof: $(libdl)
 214
 215 $(objpfx)ldconfig: $(ldconfig-modules:%=$(objpfx)%.o)
 216
 217 test-modules = $(addprefix $(objpfx),$(addsuffix .so,$(strip $(modules-names))))
 218 generated += $(addsuffix .so,$(strip $(modules-names)))
 219
 220 $(objpfx)testobj1.so: $(libdl)
 221 $(objpfx)testobj1_1.so: $(objpfx)testobj1.so $(libdl)
 222 $(objpfx)testobj2.so: $(objpfx)testobj1.so $(libdl)
 223 $(objpfx)testobj3.so: $(libdl)
 224 $(objpfx)testobj4.so: $(libdl)
 225 $(objpfx)testobj5.so: $(libdl)
 226 $(objpfx)testobj6.so: $(libdl)
 227 $(objpfx)failobj.so: $(objpfx)testobj6.so
 228 $(objpfx)dep1.so: $(objpfx)dep2.so $(objpfx)dep4.so
 229 $(objpfx)dep2.so: $(objpfx)dep3.so $(objpfx)dep4.so
 230 $(objpfx)dep4.so: $(objpfx)dep3.so
 231
 232 $(test-modules): $(objpfx)%.so: $(objpfx)%.os
 233         $(build-module)
 234
 235 $(objpfx)loadtest: $(libdl)
 236 LDFLAGS-loadtest = -rdynamic
 237
 238 $(objpfx)loadtest.out: $(test-modules)
 239
 240 $(objpfx)restest1: $(objpfx)testobj1.so $(objpfx)testobj1_1.so $(libdl)
 241 LDFLAGS-restest1 = -rdynamic
 242
 243 $(objpfx)restest1.out: $(test-modules)
 244
 245 preloadtest-preloads = testobj1 testobj2 testobj3 testobj4 testobj5
 246 $(objpfx)preloadtest: $(objpfx)testobj6.so
 247 LDFLAGS-preloadtest = -rdynamic
 248 $(objpfx)preloadtest.out: $(preloadtest-preloads:%=$(objpfx)%.so)
 249 preloadtest-ENV = \
 250   LD_PRELOAD=$(subst $(empty) ,:,$(strip $(preloadtest-preloads:=.so)))
 251
 252 $(objpfx)loadfail: $(libdl)
 253 LDFLAGS-loadfail = -rdynamic
 254
 255 $(objpfx)loadfail.out: $(objpfx)failobj.so
 256
 257 $(objpfx)multiload: $(libdl)
 258 LDFLAGS-multiload = -rdynamic
 259 CFLAGS-multiload.c = -DOBJDIR=\"$(elf-objpfx)\"
 260
 261 $(objpfx)multiload.out: $(objpfx)testobj1.so
 262
 263 $(objpfx)origtest: $(libdl)
 264 $(objpfx)origtest.out: $(objpfx)testobj1.so
 265
 266 ifeq ($(have-thread-library),yes)
 267 $(objpfx)resolvfail: $(libdl) $(shared-thread-library)
 268 else
 269 $(objpfx)resolvfail: $(libdl)
 270 endif
 271
 272 $(objpfx)constload1: $(libdl)
 273 $(objpfx)constload1.out: $(objpfx)constload2.so $(objpfx)constload3.so
 274
 275 $(objpfx)order: $(addprefix $(objpfx),dep4.so dep3.so dep2.so dep1.so)
 276
 277 $(objpfx)order.out: $(objpfx)order
 278         $(elf-objpfx)$(rtld-installed-name) \
 279           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
 280           $(objpfx)order > $@
 281         (echo "0123456789" | cmp $@ -) > /dev/null
 282
 283 $(objpfx)vismain: $(addprefix $(objpfx),vismod1.so vismod2.so)
 284 $(objpfx)vismain.out: $(addprefix $(objpfx),vismod3.so)
 285 vismain-ENV = LD_PRELOAD=$(addprefix $(objpfx),vismod3.so)