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
  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-minimal
  38 ld-map          = $(libc-map)
  39 distribute      = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
  40                   dl-hash.h soinit.c sofini.c ldd.sh.in ldd.bash.in eval.c \
  41                   genrtldtbl.awk atomicity.h dl-procinfo.h ldsodefs.h
  42
  43 extra-libs       = libdl
  44 extra-libs-others = $(extra-libs)
  45 libdl-routines  := dlopen dlclose dlsym dlvsym dlerror dladdr
  46 libdl-map       := libdl.map
  47
  48 before-compile = $(objpfx)trusted-dirs.h $(objpfx)rtldtbl.h
  49
  50
  51 all: # Make this the default target; it will be defined in Rules.
  52
  53 include ../Makeconfig
  54
  55 ifeq (yes,$(build-shared))
  56 extra-objs      = $(rtld-routines:=.os) soinit.os sofini.os eval.os
  57 generated       = librtld.os dl-allobjs.os ld.so trusted-dirs.h rtldtbl.h
  58 install-others  = $(inst_slibdir)/$(rtld-installed-name)
  59 install-bin     = ldd
  60 generated      += ldd
  61 endif
  62
  63 others          = sprof
  64 install-bin     += sprof
  65
  66 ifeq (yes,$(has-ldconfig))
  67 others-static   += ldconfig
  68 others          += ldconfig
  69 install-rootsbin = ldconfig
  70 endif
  71
  72 include ../Rules
  73
  74
  75 ifeq (yes,$(build-shared))
  76 # Make sure these things are built in the `make lib' pass so they can be used
  77 # to run programs during the `make others' pass.
  78 lib-noranlib: $(objpfx)$(rtld-installed-name) \
  79               $(addprefix $(objpfx),$(extra-objs))
  80 endif
  81
  82 # Command to link into a larger single relocatable object.
  83 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
  84
  85 $(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
  86         $(reloc-link) $^
  87
  88 # Link together the dynamic linker into a single relocatable object.
  89 $(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
  90         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
  91
  92 # Do we need a linker script?
  93 rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
  94
  95 ifneq (,$(rtld-ldscript-in))
  96 rtld-ldscript = $(objpfx)rtld-ldscript
  97 generated += rtld-ldscript
  98
  99 LDFLAGS-rtld = -T $(rtld-ldscript)
 100 before-compile += $(rtld-ldscript)
 101
 102 rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
 103 include $(rtld-parms)
 104
 105 $(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
 106         sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
 107             -e 's#@@rtld-arch@@#$(rtld-arch)#' \
 108             -e 's#@@rtld-entry@@#$(rtld-entry)#' \
 109             -e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
 110 endif
 111
 112 $(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript)) $(load-map-file)
 113         $(rtld-link) -Wl,-soname=$(rtld-installed-name)
 114
 115 define rtld-link
 116 $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
 117           -Wl,-rpath=$(default-rpath) $(LDFLAGS-rtld) \
 118           $(filter-out $(rtld-ldscript) $($(@F:.so=)-map),$^) \
 119           $(load-map-file:%=-Wl,--version-script=%)
 120 endef
 121
 122 # The dl code in the static libc needs a default library path.
 123 CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
 124
 125 ifneq (ld.so,$(rtld-installed-name))
 126 # Make sure ld.so.1 exists in the build directory so we can link
 127 # against it.
 128 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 129         rm -f $@
 130         ln -s $(<F) $@
 131 generated += $(rtld-installed-name)
 132 endif
 133
 134 # Build a file mentioning all trustworthy directories to look for shared
 135 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 136 # add directories to the list by defining $(user-defined-trusted-dirs)
 137 # before starting make.
 138 $(objpfx)trusted-dirs.h: Makefile
 139         $(make-target-directory)
 140         (for dir in `echo "$(default-rpath) $(user-defined-trusted-dirs)" |   \
 141                      sed 's/:/ /g'`; do                                       \
 142            echo "  \"$$dir\",";                                               \
 143          done;) > $@T
 144         mv -f $@T $@
 145 $(objpfx)rtldtbl.h: Makefile genrtldtbl.awk
 146         $(make-target-directory)
 147         echo "$(default-rpath)" | awk -f genrtldtbl.awk > $@T
 148         mv -f $@T $@
 149 CPPFLAGS-dl-load.c = -I$(objdir)/$(subdir)
 150 CFLAGS-dl-load.c += -Wno-uninitialized
 151
 152 # Specify the dependencies of libdl.so; its commands come from the generic
 153 # rule to build a shared library.
 154 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
 155
 156 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so
 157         $(do-install-program)
 158
 159 $(inst_slibdir)/$(rtld-installed-name): \
 160   $(inst_slibdir)/$(rtld-version-installed-name)
 161         $(make-shlib-link)
 162
 163 # Special target called by parent to install just the dynamic linker.
 164 .PHONY: ldso_install
 165 ldso_install: $(inst_slibdir)/$(rtld-installed-name)
 166
 167
 168 sh-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 169                  -e 's%@VERSION@%$(version)%g'
 170 bash-ldd-rewrite = $(sh-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
 171                    -e 's%@TEXTDOMAINDIR@%$(localedir)%g'
 172
 173 ifneq ($(have-bash2),yes)
 174 ldd-shell = bash
 175 else
 176 ldd-shell = sh
 177 endif
 178
 179 ifeq ($(ldd-rewrite-script),no)
 180 define gen-ldd
 181 sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
 182 endef
 183 else
 184 define gen-ldd
 185 sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
 186 endef
 187 endif
 188
 189 $(objpfx)ldd: ldd.$(ldd-shell).in $(common-objpfx)version.mk \
 190               $(common-objpfx)soversions.mk $(common-objpfx)config.make
 191         $(gen-ldd)
 192         chmod 555 $@.new
 193         mv -f $@.new $@
 194
 195
 196 ifeq ($(build-shared),yes)
 197 $(objpfx)sprof: $(objpfx)libdl.so$(libdl.so-version)
 198 else
 199 $(objpfx)sprof: $(objpfx)libdl.a
 200 endif
 201 \f
 202 # muwahaha
 203
 204 LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
 205 $(objpfx)libdl.so: $(objpfx)eval.os