elf/Makefile

   1 # Copyright (C) 1995, 1996, 1997, 1998, 1999 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 dl-origin
  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.bash.in eval.c \
  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                   testobj1.c testobj2.c testobj3.c testobj4.c testobj5.c \
  43                   testobj6.c testobj1_1.c failobj.c do-lookup.h \
  44                   gen-trusted-dirs.awk
  45
  46 include ../Makeconfig
  47
  48 extra-libs       = libdl
  49 extra-libs-others = $(extra-libs)
  50 libdl-routines  := dlopen dlclose dlsym dlvsym dlerror dladdr
  51 ifeq ($(versioning),yes)
  52 libdl-routines  += dlopenold
  53 libdl-shared-only-routines := dlopenold
  54 endif
  55
  56 before-compile = $(objpfx)trusted-dirs.h
  57
  58 ifeq ($(versioning),yes)
  59 ld-map          = $(common-objpfx)ld.so.map
  60 endif
  61
  62 ifeq (yes,$(build-shared))
  63 extra-objs      = $(rtld-routines:=.os) soinit.os sofini.os eval.os interp.os
  64 generated       = librtld.os dl-allobjs.os ld.so trusted-dirs.h trusted-dirs.st
  65 install-others  = $(inst_slibdir)/$(rtld-installed-name)
  66 install-bin     = ldd
  67 generated      += ldd
  68 endif
  69
  70 others          = sprof sln
  71 install-bin     += sprof
  72 others-static   = sln
  73 install-rootsbin = sln
  74
  75 ifeq (yes,$(has-ldconfig))
  76 others-static   += ldconfig
  77 others          += ldconfig
  78 install-rootsbin += ldconfig
  79 endif
  80
  81 ifeq (yes,$(build-shared))
  82 tests = loadtest restest1 preloadtest loadfail multiload origtest
  83 endif
  84 modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
  85                 testobj1_1 failobj
  86 extra-objs += $(modules-names:=.os)
  87
  88 ifeq ($(build-shared),yes)
  89 libdl = $(objpfx)libdl.so$(libdl.so-version)
  90 else
  91 libdl = $(objpfx)libdl.a
  92 endif
  93
  94 include ../Rules
  95
  96
  97 ifeq (yes,$(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 $(addprefix $(objpfx),$(rtld-ldscript)) \
 135                 $(ld-map)
 136         $(LINK.o) -nostdlib -nostartfiles -shared -o $@ $(LDFLAGS-rtld) \
 137                   $(filter-out $(rtld-ldscript) $(map-file),$^)         \
 138                   $(load-map-file) -Wl,-soname=$(rtld-installed-name)
 139
 140 # interp.c exists just to get this string into the libraries.
 141 CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"'
 142
 143 ifneq (ld.so,$(rtld-installed-name))
 144 # Make sure ld.so.1 exists in the build directory so we can link
 145 # against it.
 146 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 147         rm -f $@
 148         ln -s $(<F) $@
 149 generated += $(rtld-installed-name)
 150 endif
 151
 152 # Build a file mentioning all trustworthy directories to look for shared
 153 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 154 # add directories to the list by defining $(user-defined-trusted-dirs)
 155 # before starting make.
 156 $(objpfx)trusted-dirs.h: $(objpfx)trusted-dirs.st; @:
 157 $(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig
 158         $(make-target-directory)
 159         echo "$(subst :, ,$(default-rpath) $(user-defined-trusted-dirs))"    \
 160         | $(AWK) -f gen-trusted-dirs.awk > ${@:st=T};
 161         $(move-if-change) ${@:st=T} ${@:st=h}
 162         touch $@
 163 CPPFLAGS-dl-load.c = -I$(objpfx).
 164 CFLAGS-dl-load.c += -Wno-uninitialized
 165
 166 # Specify the dependencies of libdl.so; its commands come from the generic
 167 # rule to build a shared library.
 168 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
 169
 170 ifeq (yes,$(build-shared))
 171 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force)
 172         $(do-install-program)
 173
 174 $(inst_slibdir)/$(rtld-installed-name): \
 175   $(inst_slibdir)/$(rtld-version-installed-name)
 176         $(make-shlib-link)
 177
 178 # Special target called by parent to install just the dynamic linker.
 179 .PHONY: ldso_install
 180 ldso_install: $(inst_slibdir)/$(rtld-installed-name)
 181 endif
 182
 183
 184 common-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 185                      -e 's%@VERSION@%$(version)%g'
 186 sh-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%/bin/sh%g;s/\$$"/"/g'
 187 bash-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
 188                    -e 's%@TEXTDOMAINDIR@%$(localedir)%g'
 189
 190 ifneq ($(have-bash2),yes)
 191 ldd-shell = sh
 192 else
 193 ldd-shell = bash
 194 endif
 195
 196 ifeq ($(ldd-rewrite-script),no)
 197 define gen-ldd
 198 sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
 199 endef
 200 else
 201 define gen-ldd
 202 sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
 203 endef
 204 endif
 205
 206 $(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
 207               $(common-objpfx)config.make
 208         $(gen-ldd)
 209         chmod 555 $@.new
 210         mv -f $@.new $@
 211
 212
 213 $(objpfx)sprof: $(libdl)
 214 \f
 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
 227 $(test-modules): $(objpfx)%.so: $(objpfx)%.os
 228         $(build-module)
 229
 230 $(objpfx)loadtest: $(libdl)
 231 LDFLAGS-loadtest = -rdynamic
 232
 233 $(objpfx)loadtest.out: $(test-modules)
 234
 235 $(objpfx)restest1: $(objpfx)testobj1.so $(objpfx)testobj1_1.so $(libdl)
 236 LDFLAGS-restest1 = -rdynamic
 237
 238 $(objpfx)restest1.out: $(test-modules)
 239
 240 preloadtest-preloads = testobj1 testobj2 testobj3 testobj4 testobj5
 241 $(objpfx)preloadtest: $(objpfx)testobj6.so
 242 LDFLAGS-preloadtest = -rdynamic
 243 $(objpfx)preloadtest.out: $(preloadtest-preloads:%=$(objpfx)%.so)
 244 preloadtest-ENV = \
 245   LD_PRELOAD=$(subst $(empty) ,:,$(strip $(preloadtest-preloads:=.so)))
 246
 247 $(objpfx)loadfail: $(libdl)
 248 LDFLAGS-loadfail = -rdynamic
 249
 250 $(objpfx)loadfail.out: $(objpfx)failobj.so
 251
 252 $(objpfx)multiload: $(libdl)
 253 LDFLAGS-multiload = -rdynamic
 254 CFLAGS-multiload.c = -DOBJDIR=\"$(elf-objpfx)\"
 255
 256 $(objpfx)multiload.out: $(objpfx)testobj1.so
 257
 258 $(objpfx)origtest: $(libdl)
 259 $(objpfx)origtest.out: $(objpfx)testobj1.so
 260 \f
 261 # muwahaha
 262
 263 LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
 264 $(objpfx)libdl.so: $(objpfx)eval.os