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freebsd/lib/libthr/Makefile
Konstantin Belousov 5d00c5a657 Fix initial exec TLS mode for dynamically loaded shared objects.
If dso uses initial exec TLS mode, rtld tries to allocate TLS in
static space. If there is no space left, the dlopen(3) fails. If space
if allocated, initial content from PT_TLS segment is distributed to
all threads' pcbs, which was missed and caused un-initialized TLS
segment for such dso after dlopen(3).

The mode is auto-detected either due to the relocation used, or if the
DF_STATIC_TLS dynamic flag is set.  In the later case, the TLS segment
is tried to allocate earlier, which increases chance of the dlopen(3)
to succeed.  LLD was recently fixed to properly emit the flag, ld.bdf
did it always.

Initial test by:	dumbbell
Tested by:	emaste (amd64), ian (arm)
Tested by:	Gerald Aryeetey <aryeeteygerald_rogers.com> (arm64)
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D19072
2019-03-29 17:52:57 +00:00

78 lines
1.9 KiB
Makefile

# $FreeBSD$
#
# All library objects contain FreeBSD revision strings by default; they may be
# excluded as a space-saving measure. To produce a library that does
# not contain these strings, add -DSTRIP_FBSDID (see <sys/cdefs.h>) to CFLAGS
# below.
PACKAGE= clibs
SHLIBDIR?= /lib
.include <src.opts.mk>
MK_SSP= no
LIB=thr
SHLIB_MAJOR= 3
NO_WTHREAD_SAFETY=1
NO_WCAST_ALIGN.gcc=1 # for gcc 4.2
CFLAGS+=-DPTHREAD_KERNEL
CFLAGS+=-I${SRCTOP}/lib/libc/include
CFLAGS+=-I${SRCTOP}/lib/libc/${MACHINE_CPUARCH}
CFLAGS+=-I${.CURDIR}/thread
CFLAGS+=-I${SRCTOP}/include
CFLAGS+=-I${.CURDIR}/arch/${MACHINE_CPUARCH}/include
CFLAGS+=-I${.CURDIR}/sys
CFLAGS+=-I${SRCTOP}/libexec/rtld-elf
CFLAGS+=-I${SRCTOP}/libexec/rtld-elf/${MACHINE_CPUARCH}
CFLAGS+=-I${SRCTOP}/lib/libthread_db
CFLAGS+=-Winline
CFLAGS.thr_stack.c+= -Wno-cast-align
CFLAGS.rtld_malloc.c+= -Wno-cast-align
.include <bsd.compiler.mk>
.if !(${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} < 40300)
CFLAGS.thr_symbols.c+= -Wno-missing-variable-declarations
.endif
.ifndef NO_THREAD_UNWIND_STACK
CFLAGS+=-fexceptions
CFLAGS+=-D_PTHREAD_FORCED_UNWIND
.endif
LDFLAGS+=-Wl,-znodelete
VERSION_DEF=${SRCTOP}/lib/libc/Versions.def
SYMBOL_MAPS=${.CURDIR}/pthread.map
MAN= libthr.3
# enable extra internal consistency checks
CFLAGS+=-D_PTHREADS_INVARIANTS
PRECIOUSLIB=
.PATH: ${.CURDIR}/arch/${MACHINE_CPUARCH}/${MACHINE_CPUARCH}
.PATH: ${SRCTOP}/libexec/rtld-elf
.if exists(${.CURDIR}/arch/${MACHINE_CPUARCH}/Makefile.inc)
.include "${.CURDIR}/arch/${MACHINE_CPUARCH}/Makefile.inc"
.endif
.include "${.CURDIR}/sys/Makefile.inc"
.include "${.CURDIR}/thread/Makefile.inc"
SRCS+= rtld_malloc.c
.if ${MK_INSTALLLIB} != "no"
SYMLINKS+=lib${LIB}.a ${LIBDIR}/libpthread.a
.endif
.if !defined(NO_PIC)
SYMLINKS+=lib${LIB}.so ${LIBDIR}/libpthread.so
.endif
.if ${MK_PROFILE} != "no"
SYMLINKS+=lib${LIB}_p.a ${LIBDIR}/libpthread_p.a
.endif
HAS_TESTS=
SUBDIR.${MK_TESTS}+= tests
.include <bsd.lib.mk>