mirror of
https://github.com/opnsense/src.git
synced 2026-06-08 08:12:27 -04:00
d40daefca6
This allows, for instance, to interpose opendir() with an implementation that calls into fdopendir(), without causing multiple symbol definitions when libc is linked in statically. This is aligned with the quality of implementation principle that single object file from a static library should not provide more than one app-visible symbol. [The copyright for fopendir() was copied, it might be refined by the author] Reviewed by: brooks Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D49089
98 lines
3.7 KiB
Makefile
98 lines
3.7 KiB
Makefile
# This makefiles adds the necessary libc dependencies for RTLD without pulling
|
|
# in all of the complex libc bits such as locales, etc.
|
|
|
|
.include <bsd.compiler.mk>
|
|
|
|
LIBC_SRCTOP=${SRCTOP}/lib/libc
|
|
.if exists(${LIBC_SRCTOP}/${MACHINE_ARCH:S/powerpc64le/powerpc64/})
|
|
LIBC_ARCH=${MACHINE_ARCH:S/powerpc64le/powerpc64/}
|
|
.else
|
|
LIBC_ARCH=${MACHINE_CPUARCH}
|
|
.endif
|
|
|
|
CFLAGS+= -I${SRCTOP}/libexec/rtld-elf/rtld-libc
|
|
|
|
# Build all the libc files that use interposed symbols or pthreads again for
|
|
# RTLD. We compile with a different libc_private.h and namespace.h that
|
|
# redirects all calls to interposed functions to use the non-interposed version
|
|
# instead.
|
|
.PATH: ${LIBC_SRCTOP}/gen
|
|
SRCS+= fdopendir.c opendir.c opendir2.c closedir.c readdir.c telldir.c
|
|
|
|
# Avoid further dependencies by providing simple implementations of libc
|
|
# functions such as __error(), etc.
|
|
.PATH: ${SRCTOP}/libexec/rtld-elf/rtld-libc
|
|
SRCS+= rtld_libc.c
|
|
|
|
# Now build the remaining files from libc:
|
|
.PATH: ${LIBC_SRCTOP}/stdlib
|
|
SRCS+= reallocf.c realpath.c merge.c reallocarray.c
|
|
# TODO: fix merge.c to build with WARNS=6
|
|
.if ${COMPILER_TYPE} == "clang"
|
|
CFLAGS.merge.c+=-Wno-error=null-pointer-arithmetic
|
|
.endif
|
|
.PATH: ${LIBC_SRCTOP}/gen
|
|
SRCS+= errlst.c getcwd.c getprogname.c raise.c sigsetops.c sysctlnametomib.c \
|
|
__xuname.c
|
|
# errlst.c needs the errlst.h header from libc:
|
|
CFLAGS.errlst.c+=-I${LIBC_SRCTOP}/include
|
|
|
|
# use generic versions of string functions to avoid potential ifunc dispatch
|
|
.PATH: ${LIBC_SRCTOP}/string
|
|
SRCS+= bcopy.c bzero.c memchr.c memcmp.c memcpy.c memmove.c memset.c strcat.c \
|
|
strchr.c strchrnul.c strcmp.c strcpy.c strcspn.c strdup.c strlcat.c \
|
|
strlcpy.c strlen.c strncmp.c strncpy.c strrchr.c strsep.c strspn.c \
|
|
strstr.c strtok.c
|
|
CFLAGS.memchr.c+=-Wno-cast-qual
|
|
CFLAGS.strchr.c+=-Wno-cast-qual
|
|
CFLAGS.strchrnul.c+=-Wno-cast-qual
|
|
CFLAGS.strcspn.c+=-Wno-sign-compare
|
|
CFLAGS.strrchr.c+=-Wno-cast-qual
|
|
CFLAGS.strspn.c+=-Wno-sign-compare
|
|
CFLAGS.strstr.c+=-Wno-cast-qual -Wno-sign-compare
|
|
CFLAGS.strtok.c+=-Wno-cast-qual
|
|
|
|
# Also use all the syscall .o files from libc_nossp_pic:
|
|
_libc_other_objects= sigsetjmp lstat stat fstat fstatat fstatfs syscall \
|
|
cerror geteuid getegid sigfastblock munmap mprotect \
|
|
sysarch __sysctl issetugid __getcwd utrace getpid \
|
|
thr_self thr_kill pread mmap lseek _exit \
|
|
getdirentries _close _fcntl _open _openat _read \
|
|
_sigprocmask _write readlink ___realpathat _setjmp setjmp setjmperr
|
|
|
|
|
|
# Finally add additional architecture-dependent libc dependencies
|
|
.if ${LIBC_ARCH} == "arm"
|
|
# ARM needs aeabi_unwind_cpp for _setjmp
|
|
_libc_other_objects+=aeabi_unwind_cpp
|
|
.elif ${LIBC_ARCH} == "i386"
|
|
# i386 needs i386_set_gsbase for allocate_initial_tls()
|
|
_libc_other_objects+=i386_set_gsbase
|
|
.elif ${LIBC_ARCH} == "powerpc" || ${LIBC_ARCH} == "powerpcspe"
|
|
# ppc needs __syncicache and abs for reloc.c
|
|
_libc_other_objects+=syncicache abs
|
|
.elif ${LIBC_ARCH} == "powerpc64"
|
|
# ppc64 needs __syncicache for reloc.c
|
|
_libc_other_objects+=syncicache
|
|
.endif
|
|
|
|
# Extract all the .o files from libc_nossp_pic.a. This ensures that
|
|
# we don't accidentally pull in the interposing table or similar by linking
|
|
# directly against libc_nossp_pic.a
|
|
_rtld_libc_objs=
|
|
.for _obj in ${_libc_other_objects}
|
|
_rtld_libc_objs+=${_obj}.nossppico
|
|
CLEANFILES+=${_obj}.nossppico
|
|
# LDFLAGS+= -Wl,--trace-symbol=${_obj}
|
|
.endfor
|
|
# LDFLAGS+= -Wl,--trace
|
|
|
|
# We insert all the .o files from libc_nossp_pic.a into a new rtld_libc.a file
|
|
# to ensure that only .o files that are actually used end up being included.
|
|
rtld_libc.a: ${LIBC_NOSSP_PIC} ${SRCTOP}/libexec/rtld-elf/rtld-libc/Makefile.inc
|
|
@rm -f ${.TARGET}
|
|
${AR} x ${LIBC_NOSSP_PIC} ${_rtld_libc_objs}
|
|
${AR} cr ${.TARGET} ${_rtld_libc_objs}
|
|
CLEANFILES+=rtld_libc.a
|
|
LDADD+=${.OBJDIR}/rtld_libc.a
|
|
beforelinking: rtld_libc.a
|