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
|
# Makefile for elf subdirectory of GNU C Library.
# Copyright (C) 1995, 1996, 1997 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.
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
# 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-minimal
distribute = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
dl-hash.h soinit.c sofini.c ldd.sh.in ldd.bash.in eval.c \
genrtldtbl.awk atomicity.h
extra-libs = libdl
extra-libs-others = $(extra-libs)
libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr
libdl-map := libdl.map
before-compile = $(objpfx)trusted-dirs.h $(objpfx)rtldtbl.h
# We need GNU awk for the genrtldtbl.awk script.
GAWK = gawk
all: # Make this the default target; it will be defined in Rules.
include ../Makeconfig
ifeq (yes,$(build-shared))
extra-objs = $(rtld-routines:=.os) soinit.os sofini.os eval.os
generated = librtld.os dl-allobjs.os trusted-dirs.h rtldtbl.h
install-others = $(inst_slibdir)/$(rtld-installed-name)
install-bin = ldd
endif
ifeq (yes,$(has-ldconfig))
extra-objs += ldconfig.o
install-rootsbin = ldconfig
$(objpfx)ldconfig: $(objpfx)ldconfig.o
$(CC) -nostdlib -nostartfiles -o $@ $(sysdep-LDFLAGS) -static \
$(addprefix $(csu-objpfx),start.o) $(+preinit) \
$(filter-out $(addprefix $(csu-objpfx),start.o) $(+preinit) \
$(link-extra-libs) $(common-objpfx)libc% $(+postinit),$^) \
$(link-extra-libs) $(common-objpfx)libc.a $(gnulib) $(+postinit)
endif
include ../Rules
ifeq (yes,$(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))
LDFLAGS-rtld = -T $(objpfx)rtld-ldscript
before-compile += $(objpfx)rtld-ldscript
rtld-parms = $(wildcard $(+sysdep_dirs:%=%/rtld-parms))
include $(rtld-parms)
generated += rtld-ldscript
$(objpfx)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)#' $< >$@
$(objpfx)ld.so: $(objpfx)librtld.os $(objpfx)rtld-ldscript
$(rtld-link) -Wl,-soname=$(rtld-installed-name)
define rtld-link
$(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
-Wl,-rpath=$(default-rpath) $(LDFLAGS-rtld) \
$(filter-out $(objpfx)rtld-ldscript,$^)
endef
else
$(objpfx)ld.so: $(objpfx)librtld.os
$(rtld-link) -Wl,-soname=$(rtld-installed-name)
define rtld-link
$(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
-Wl,-rpath=$(default-rpath) $^
endef
endif
# The dl code in the static libc needs a default library path.
CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
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) $@
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: Makefile
$(make-target-directory)
(for dir in `echo "$(default-rpath) $(user-defined-trusted-dirs)" | \
sed 's/:/ /g'`; do \
echo " \"$$dir\","; \
done;) > $@T
mv -f $@T $@
$(objpfx)rtldtbl.h: Makefile
$(make-target-directory)
echo "$(default-rpath)" | $(GAWK) -f genrtldtbl.awk > $@T
mv -f $@T $@
CPPFLAGS-dl-load.c = -I$(objdir)/$(subdir)
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
$(do-install-program)
$(inst_slibdir)/$(rtld-installed-name): \
$(inst_slibdir)/$(rtld-version-installed-name)
$(make-shlib-link)
ifneq ($(have-bash2),yes)
$(objpfx)ldd: ldd.sh.in $(common-objpfx)version.mk \
$(common-objpfx)soversions.mk $(common-objpfx)config.make
sed -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
-e 's%@VERSION@%$(version)%g' < $< > $@.new
chmod 555 $@.new
mv -f $@.new $@
else
$(objpfx)ldd: ldd.bash.in $(common-objpfx)version.mk \
$(common-objpfx)soversions.mk $(common-objpfx)config.make
sed -e 's%@BASH@%$(BASH)%g' \
-e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
-e 's%@VERSION@%$(version)%g' \
-e 's%@TEXTDOMAINDIR@%$(localedir)%g' < $< > $@.new
chmod 555 $@.new
mv -f $@.new $@
endif
# muwahaha
LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
$(objpfx)libdl.so: $(objpfx)eval.os
|
