diff options
Diffstat (limited to 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/elf/Makefile b/elf/Makefile index b144e90..34be12e 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -20,18 +20,25 @@ subdir := elf -headers := elf.h libelf.h link.h dlfcn.h -routines := init-first +headers = elf.h link.h dlfcn.h +routines = init-first $(dl-routines) dl-open dl-symbol dl-support + +# The core dynamic linking functions are in libc for the static and +# profiled libraries. +dl-routines = $(addprefix dl-,load lookup object reloc deps \ + runtime error init fini) +# But they are absent from the shared libc, because that code is in ld.so. +elide-routines.so = $(dl-routines) dl-support + +# 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 \ + soinit.c sofini.c ldd.sh.in linux-compat.c -extra-libs = libelf libdl -libelf-routines := elf_hash +extra-libs = libdl libdl-routines := dlopen dlclose dlsym dlerror dladdr -libdl-inhibit-o = $(filter-out .so,$(object-suffixes)) # Build only shared. -rtld-routines := rtld $(addprefix dl-,minimal load lookup object reloc \ - deps runtime sysdep error init fini) -distribute = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \ - soinit.c sofini.c ldd.sh.in linux-compat.c all: # Make this the default target; it will be defined in Rules. @@ -43,7 +50,7 @@ generated = librtld.so dl-allobjs.so install-others = $(slibdir)/$(rtld-installed-name) install-bin = ldd -# Make sure these things is built in the `make lib' pass so it can be used +# 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)ld.so $(addprefix $(objpfx),$(extra-objs)) @@ -81,16 +88,17 @@ $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \ -Wl,-rpath=$(default-rpath) $^ endef +# The dl code in the static libc needs a default library path. +CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"' + # The Linux-compatible dynamic linker shared object is just the same # with one object file of compatibility initialization code added. $(objpfx)ld-linux.so.1: $(objpfx)linux-compat.so +# 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 - $(patsubst %/,cd %;,$(objpfx)) \ - $(LINK.o) -shared -o $(@:$(objpfx)%=%) \ - $(LDFLAGS.so) $(LDFLAGS-dl.so) \ - -Wl,--whole-archive $(^:$(objpfx)%=%) $(no-whole-archive) $(slibdir)/$(rtld-installed-name): $(objpfx)ld.so; $(do-install-program) $(slibdir)/ld-linux.so.1: $(objpfx)ld-linux.so.1; $(do-install-program) |