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|
# Use the following command to build local debug version of dynamic
# linker:
# make DEBUG_FLAGS=-g WITHOUT_TESTS=yes all
RTLD_ELF_DIR:= ${.PARSEDIR}
.include <src.opts.mk>
PACKAGE= clibs
MK_PIE= no # Always position independent using local rules
# Not compatible with sanitizer instrumentation or SSP.
MK_ASAN= no
MK_SSP= no
MK_UBSAN= no
.include <bsd.compat.pre.mk>
# SSP forced off already implies FORTIFY_SOURCE=0, but we must make sure that
# one cannot turn it back on.
FORTIFY_SOURCE= 0
.if !defined(NEED_COMPAT)
CONFS= libmap.conf
.endif
PROG?= ld-elf.so.1
.for _libcompat in ${_ALL_libcompats}
.if ${PROG:M*ld-elf${_libcompat}[-.]*} != ""
TAGS+= lib${_libcompat}
.endif
.endfor
SRCS= \
crtbrand.S \
rtld_start.S \
reloc.c \
rtld.c \
rtld_lock.c \
rtld_malloc.c \
rtld_printf.c \
map_object.c \
xmalloc.c \
debug.c \
libmap.c
MAN?= rtld.1
ACFLAGS+= -DLOCORE
CFLAGS+= -Wall -DIN_RTLD -ffreestanding
CFLAGS+= -I${SRCTOP}/lib/csu/common
.if exists(${RTLD_ELF_DIR}/${MACHINE_ARCH:S/powerpc64le/powerpc64/})
RTLD_ARCH= ${MACHINE_ARCH:S/powerpc64le/powerpc64/}
.else
RTLD_ARCH= ${MACHINE_CPUARCH}
.endif
CFLAGS+= -I${RTLD_ELF_DIR}/${RTLD_ARCH} -I${RTLD_ELF_DIR}
NO_WCAST_ALIGN= yes
INSTALLFLAGS= -C -b
PRECIOUSPROG=
BINDIR= /libexec
SYMLINKS= ../..${BINDIR}/${PROG} ${LIBEXECDIR}/${PROG}
MLINKS?= rtld.1 ld-elf.so.1.1 \
rtld.1 ld.so.1
CFLAGS+= -fpic -DPIC $(DEBUG)
LDFLAGS+= -shared -Wl,-Bsymbolic -Wl,-z,defs -nostdlib -e ${RTLD_ENTRY}
# Pull in the dependencies that we use from libc
.include "rtld-libc/Makefile.inc"
VERSION_DEF= ${LIBCSRCDIR}/Versions.def
SYMBOL_MAPS= ${RTLD_ELF_DIR}/Symbol.map
VERSION_MAP= Version.map
LDFLAGS+= -Wl,--version-script=${VERSION_MAP}
.if exists(${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map)
SYMBOL_MAPS+= ${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map
.endif
.sinclude "${RTLD_ELF_DIR}/${RTLD_ARCH}/Makefile.inc"
RTLD_ENTRY?= .rtld_start
# Always produce the map file so that may be inspected to confirm
# undesired code is not linked from libsys/libc.
MAPFILE= ld-elf.so.1.map
LDFLAGS+= -Wl,-Map=${MAPFILE} -Wl,--cref
CLEANFILES+= ${MAPFILE}
afterbuild:
@if grep __libsys_interposing ${MAPFILE} >/dev/null ; then \
echo "libsys_interposing leaked" 1>&2 ; \
exit 1 ; \
fi
@if grep __libc_interposing ${MAPFILE} >/dev/null ; then \
echo "libc_interposing leaked" 1>&2 ; \
exit 1 ; \
fi
@if grep xlocale ${MAPFILE} >/dev/null ; then \
echo "xlocale leaked" 1>&2 ; \
exit 1 ; \
fi
@if grep fprintf ${MAPFILE} >/dev/null ; then \
echo "stdio leaked" 1>&2 ; \
exit 1 ; \
fi
# Since moving rtld-elf to /libexec, we need to create a symlink.
# Fixup the existing binary that's there so we can symlink over it.
beforeinstall:
.if exists(${DESTDIR}/usr/libexec/${PROG}) && ${MK_STAGING} == "no"
-chflags -h noschg ${DESTDIR}/usr/libexec/${PROG}
.endif
.PATH: ${RTLD_ELF_DIR}/${RTLD_ARCH} ${SRCTOP}/lib/csu/common
.if ${.CURDIR} == ${RTLD_ELF_DIR}
HAS_TESTS=
SUBDIR.${MK_TESTS}+= tests
.endif
# Some of the required math functions (div & mod) are implemented in
# libcompiler_rt on some architectures.
LIBADD+= compiler_rt
.include <bsd.prog.mk>
${PROG_FULL}: ${VERSION_MAP}
.include <bsd.symver.mk>
.if ${COMPILER_TYPE} == "gcc"
# GCC warns about redeclarations even though they have __exported
# and are therefore not identical to the ones from the system headers.
CFLAGS+= -Wno-redundant-decls
.endif
# Add dependencies on libc and libsys archives after bsd.prog.mk
# includes bsd.libnames.mk so they are defined.
rtld_libc.a: ${LIBC_NOSSP_PIC} ${LIBSYS_PIC}
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