2 # This makefiles adds the necessary libc dependencies for RTLD without pulling
3 # in all of the complex libc bits such as locales, etc.
5 .include <bsd.compiler.mk>
7 LIBC_SRCTOP=${SRCTOP}/lib/libc
8 .if exists(${LIBC_SRCTOP}/${MACHINE_ARCH})
9 LIBC_ARCH=${MACHINE_ARCH}
11 LIBC_ARCH=${MACHINE_CPUARCH}
14 CFLAGS+= -I${SRCTOP}/libexec/rtld-elf/rtld-libc
16 # Build all the libc files that use interposed symbols or pthreads again for
17 # RTLD. We compile with a different libc_private.h and namespace.h that
18 # redirects all calls to interposed functions to use the non-interposed version
20 .PATH: ${LIBC_SRCTOP}/gen
21 SRCS+= opendir.c closedir.c readdir.c telldir.c
23 # Avoid further dependencies by providing simple implementations of libc
24 # functions such as __error(), etc.
25 .PATH: ${SRCTOP}/libexec/rtld-elf/rtld-libc
28 # Now build the remaining files from libc:
29 .PATH: ${LIBC_SRCTOP}/stdlib
30 SRCS+= reallocf.c realpath.c getenv.c merge.c reallocarray.c
31 # TODO: fix merge.c to build with WARNS=6
32 .if ${COMPILER_TYPE} == "clang"
33 CFLAGS.merge.c+=-Wno-error=null-pointer-arithmetic
35 .PATH: ${LIBC_SRCTOP}/gen
36 SRCS+= errlst.c getcwd.c getprogname.c raise.c sigsetops.c sysctlnametomib.c \
38 # errlst.c needs the errlst.h header from libc:
39 CFLAGS.errlst.c+=-I${LIBC_SRCTOP}/include
41 # Use the string and memory .o files from libc instead of rebuilding them (they
42 # might be using optimized assembly and duplicating that logic here is awkward).
43 _libc_string_objects= bcmp bcopy bzero memset memchr memcmp memcpy memmove \
44 stpncpy strcat strchr strcmp stpcpy strcpy strcspn strdup strlcat strlcpy \
45 strlen strncmp strncpy strrchr strsep strspn strstr strtok
46 # Also use all the syscall .o files from libc_nossp_pic:
47 _libc_other_objects= sigsetjmp lstat stat fstat fstatat fstatfs syscall \
48 cerror geteuid getegid sigfastblock munmap mprotect \
49 sysarch __sysctl issetugid __getcwd utrace \
50 thr_self thr_kill pread mmap lseek _exit _fstat _fstatat _fstatfs \
51 getdirentries _getdirentries _close _fcntl _open _openat _read \
52 _sigprocmask _write readlink __realpathat _setjmp setjmp setjmperr
55 # Finally add additional architecture-dependent libc dependencies
56 .if ${LIBC_ARCH} == "arm"
57 # ARM needs aeabi_unwind_cpp for _setjmp
58 _libc_other_objects+=aeabi_unwind_cpp
59 .elif ${LIBC_ARCH} == "i386"
60 # __udivdi3 is needed by kvprintf() in rtld_printf.c
61 # i386 also needs i386_set_gsbase for allocate_initial_tls()
62 _libc_other_objects+=umoddi3 udivdi3 qdivrem i386_set_gsbase
63 .elif ${LIBC_ARCH} == "powerpc" || ${LIBC_ARCH} == "powerpcspe"
64 # ppc needs __syncicache for reloc.c and __umoddi3+__udivdi3 for rtld_printf.c
65 _libc_other_objects+=syncicache umoddi3 udivdi3 qdivrem
66 # for some reason there is also a reference to abs()
67 _libc_other_objects+=abs
68 .elif ${LIBC_ARCH} == "powerpc64"
69 # ppc64 needs __syncicache for reloc.c
70 _libc_other_objects+=syncicache
71 .elif ${LIBC_ARCH} == "mips"
72 # 32-bit MIPS needs __umoddi3+__udivdi3 for rtld_printf.c
73 .if ${MACHINE_ARCH:Mmipsn32*} == "" && ${MACHINE_ARCH:Mmips64*} == ""
74 _libc_other_objects+=umoddi3 udivdi3 qdivrem
78 # Extract all the .o files from libc_nossp_pic.a. This ensures that
79 # we don't accidentally pull in the interposing table or similar by linking
80 # directly against libc_nossp_pic.a
82 .for _obj in ${_libc_other_objects} ${_libc_string_objects}
83 _rtld_libc_objs+=${_obj}.nossppico
84 CLEANFILES+=${_obj}.nossppico
85 # LDFLAGS+= -Wl,--trace-symbol=${_obj}
87 # LDFLAGS+= -Wl,--trace
89 # We insert all the .o files from libc_nossp_pic.a into a new rtld_libc.a file
90 # to ensure that only .o files that are actually used end up being included.
91 rtld_libc.a: ${LIBC_NOSSP_PIC} ${SRCTOP}/libexec/rtld-elf/rtld-libc/Makefile.inc
92 ${AR} x ${LIBC_NOSSP_PIC} ${_rtld_libc_objs}
93 ${AR} cr ${.OBJDIR}/${.TARGET} ${_rtld_libc_objs}
94 CLEANFILES+=rtld_libc.a
95 LDADD+=${.OBJDIR}/rtld_libc.a
96 beforelinking: rtld_libc.a