1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
# Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB. If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# Makefile for elf subdirectory of GNU C Library.
subdir := elf
headers = elf.h bits/elfclass.h bits/dlfcn.h link.h dlfcn.h
routines = $(dl-routines) dl-open dl-close dl-symbol dl-support \
dl-addr enbl-secure dl-profstub
# The core dynamic linking functions are in libc for the static and
# profiled libraries.
dl-routines = $(addprefix dl-,load cache lookup object reloc deps \
runtime error init fini debug misc \
version profile)
# But they are absent from the shared libc, because that code is in ld.so.
elide-routines.os = $(dl-routines) dl-support enbl-secure
# ld.so uses those routines, plus some special stuff for being the program
# interpreter and operating independent of libc.
rtld-routines := rtld $(dl-routines) dl-sysdep dl-environ dl-minimal
distribute = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
dl-hash.h soinit.c sofini.c ldd.bash.in eval.c \
genrtldtbl.awk atomicity.h dl-procinfo.h ldsodefs.h \
dl-librecon.h interp.c sln.c dl-origin.h hp-timing.h
include ../Makeconfig
extra-libs = libdl
extra-libs-others = $(extra-libs)
libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr
ifeq ($(versioning),yes)
libdl-routines += dlopenold
libdl-shared-only-routines := dlopenold
endif
before-compile = $(objpfx)trusted-dirs.h
ifeq ($(versioning),yes)
ld-map = $(common-objpfx)libc.map
endif
ifeq (yes,$(build-shared))
extra-objs = $(rtld-routines:=.os) soinit.os sofini.os eval.os interp.os
generated = librtld.os dl-allobjs.os ld.so trusted-dirs.h trusted-dirs.st
install-others = $(inst_slibdir)/$(rtld-installed-name)
install-bin = ldd
generated += ldd
endif
others = sprof sln
install-bin += sprof
others-static = sln
install-rootsbin = sln
ifeq (yes,$(has-ldconfig))
others-static += ldconfig
others += ldconfig
install-rootsbin += ldconfig
endif
tests = loadtest restest1
include ../Rules
ifeq (yes,$(build-shared))
# Make sure these things are built in the `make lib' pass so they can be used
# to run programs during the `make others' pass.
lib-noranlib: $(objpfx)$(rtld-installed-name) \
$(addprefix $(objpfx),$(extra-objs))
endif
# Command to link into a larger single relocatable object.
reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
$(objpfx)dl-allobjs.os: $(rtld-routines:%=$(objpfx)%.os)
$(reloc-link) $^
# Link together the dynamic linker into a single relocatable object.
$(objpfx)librtld.os: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a
$(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
# Do we need a linker script?
rtld-ldscript-in := $(firstword $(wildcard $(+sysdep_dirs:%=%/rtld-ldscript.in)))
ifneq (,$(rtld-ldscript-in))
rtld-ldscript = $(objpfx)rtld-ldscript
generated += rtld-ldscript
LDFLAGS-rtld = -T $(rtld-ldscript)
before-compile += $(rtld-ldscript)
rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
include $(rtld-parms)
$(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms)
sed -e 's#@@rtld-oformat@@#$(rtld-oformat)#' \
-e 's#@@rtld-arch@@#$(rtld-arch)#' \
-e 's#@@rtld-entry@@#$(rtld-entry)#' \
-e 's#@@rtld-base@@#$(rtld-base)#' $< >$@
endif
$(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript)) \
$(ld-map)
$(LINK.o) -nostdlib -nostartfiles -shared -o $@ $(LDFLAGS-rtld) \
$(filter-out $(rtld-ldscript) $(map-file),$^) \
$(load-map-file) -Wl,-soname=$(rtld-installed-name)
# interp.c exists just to get this string into the libraries.
CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"'
ifneq (ld.so,$(rtld-installed-name))
# Make sure ld.so.1 exists in the build directory so we can link
# against it.
$(objpfx)$(rtld-installed-name): $(objpfx)ld.so
rm -f $@
ln -s $(<F) $@
generated += $(rtld-installed-name)
endif
# Build a file mentioning all trustworthy directories to look for shared
# libraries when using LD_LIBRARY_PATH in a setuid program. The user can
# add directories to the list by defining $(user-defined-trusted-dirs)
# before starting make.
$(objpfx)trusted-dirs.h: $(objpfx)trusted-dirs.st; @:
$(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig
$(make-target-directory)
dirs="$(subst :, ,$(default-rpath) $(user-defined-trusted-dirs))"; \
for dir in $$dirs; do \
echo " \"$$dir/\","; \
done > ${@:st=T}
$(move-if-change) ${@:st=T} ${@:st=h}
touch $@
CPPFLAGS-dl-load.c = -I$(objpfx).
CFLAGS-dl-load.c += -Wno-uninitialized
# Specify the dependencies of libdl.so; its commands come from the generic
# rule to build a shared library.
$(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
$(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force)
$(do-install-program)
$(inst_slibdir)/$(rtld-installed-name): \
$(inst_slibdir)/$(rtld-version-installed-name)
$(make-shlib-link)
# Special target called by parent to install just the dynamic linker.
.PHONY: ldso_install
ldso_install: $(inst_slibdir)/$(rtld-installed-name)
common-ldd-rewrite = -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
-e 's%@VERSION@%$(version)%g'
sh-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%/bin/sh%g;s/\$$"/"/g'
bash-ldd-rewrite = $(common-ldd-rewrite) -e 's%@BASH@%$(BASH)%g' \
-e 's%@TEXTDOMAINDIR@%$(localedir)%g'
ifneq ($(have-bash2),yes)
ldd-shell = sh
else
ldd-shell = bash
endif
ifeq ($(ldd-rewrite-script),no)
define gen-ldd
sed $($(ldd-shell)-ldd-rewrite) < $< > $@.new
endef
else
define gen-ldd
sed $($(ldd-shell)-ldd-rewrite) < $< | sed -f $(ldd-rewrite-script) > $@.new
endef
endif
$(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
$(common-objpfx)config.make
$(gen-ldd)
chmod 555 $@.new
mv -f $@.new $@
ifeq ($(build-shared),yes)
$(objpfx)sprof: $(objpfx)libdl.so$(libdl.so-version)
else
$(objpfx)sprof: $(objpfx)libdl.a
endif
# This macro is similar to build-shlib but it does not define a soname
# and it does not depend on the destination name to start with `lib'.
define build-module
$(LINK.o) -shared -o $@ $(sysdep-LDFLAGS) $(config-LDFLAGS) \
-B$(csu-objpfx) $(load-map-file) \
$(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link) \
-Wl,--whole-archive -Wl,-soname,$(@F) \
$(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
$(no-whole-archive) $(LDLIBS-$(@F:%.so=%).so)
endef
modules-names = testobj1 testobj2 testobj3 testobj1_1
test-modules = $(addprefix $(objpfx),$(addsuffix .so,$(modules-names)))
generated += $(test-modules)
$(objpfx)testobj1_1.so: $(objpfx)testobj1.so
LDLIBS-testobj1_1.so = $(objpfx)testobj1.so
$(objpfx)testobj2.so: $(objpfx)testobj1.so
LDLIBS-testobj2.so = $(objpfx)testobj1.so
$(test-modules): $(objpfx)%.so: %.c
$(build-module)
$(objpfx)loadtest: $(objpfx)libdl.so
LDFLAGS-loadtest = -rdynamic
$(objpfx)loadtest.out: $(test-modules)
$(objpfx)restest1: $(objpfx)libdl.so
LDFLAGS-restest1 = -rdynamic $(objpfx)testobj1.so $(objpfx)testobj1_1.so
$(objpfx)restest1.out: $(test-modules)
# muwahaha
LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
$(objpfx)libdl.so: $(objpfx)eval.os
|
