9638d3e2e6
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
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/*
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* Copyright (c) 2014 The FreeBSD Foundation.
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* All rights reserved.
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*
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* Portions of this software were developed by Konstantin Belousov
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include "libc_private.h"
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#define SLOT(a, b) \
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[INTERPOS_##a] = (interpos_func_t)b
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interpos_func_t __libc_interposing[INTERPOS_MAX] = {
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SLOT(accept, __sys_accept),
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SLOT(accept4, __sys_accept4),
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SLOT(aio_suspend, __sys_aio_suspend),
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SLOT(close, __sys_close),
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SLOT(connect, __sys_connect),
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SLOT(fcntl, __sys_fcntl),
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SLOT(fsync, __sys_fsync),
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SLOT(fork, __sys_fork),
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SLOT(msync, __sys_msync),
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SLOT(nanosleep, __sys_nanosleep),
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SLOT(openat, __sys_openat),
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SLOT(poll, __sys_poll),
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SLOT(pselect, __sys_pselect),
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SLOT(read, __sys_read),
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SLOT(readv, __sys_readv),
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SLOT(recvfrom, __sys_recvfrom),
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SLOT(recvmsg, __sys_recvmsg),
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SLOT(select, __sys_select),
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SLOT(sendmsg, __sys_sendmsg),
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SLOT(sendto, __sys_sendto),
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SLOT(setcontext, __sys_setcontext),
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SLOT(sigaction, __sys_sigaction),
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SLOT(sigprocmask, __sys_sigprocmask),
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SLOT(sigsuspend, __sys_sigsuspend),
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SLOT(sigwait, __libc_sigwait),
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SLOT(sigtimedwait, __sys_sigtimedwait),
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SLOT(sigwaitinfo, __sys_sigwaitinfo),
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SLOT(swapcontext, __sys_swapcontext),
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SLOT(system, __libc_system),
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SLOT(tcdrain, __libc_tcdrain),
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SLOT(wait4, __sys_wait4),
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SLOT(write, __sys_write),
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SLOT(writev, __sys_writev),
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SLOT(_pthread_mutex_init_calloc_cb, _pthread_mutex_init_calloc_cb_stub),
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SLOT(spinlock, __libc_spinlock_stub),
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SLOT(spinunlock, __libc_spinunlock_stub),
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SLOT(kevent, __sys_kevent),
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SLOT(wait6, __sys_wait6),
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SLOT(ppoll, __sys_ppoll),
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SLOT(map_stacks_exec, __libc_map_stacks_exec),
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SLOT(fdatasync, __sys_fdatasync),
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SLOT(clock_nanosleep, __sys_clock_nanosleep),
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SLOT(distribute_static_tls, __libc_distribute_static_tls),
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};
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#undef SLOT
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interpos_func_t *
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__libc_interposing_slot(int interposno)
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{
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return (&__libc_interposing[interposno]);
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}
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