0538aafc41
pwrite(2) syscalls are wrapped to provide compatibility with pre-7.x kernels which required padding before the off_t parameter. The fcntl(2) contains compatibility code to handle kernels before the struct flock was changed during the 8.x CURRENT development. The shims were reasonable to allow easier revert to the older kernel at that time. Now, two or three major releases later, shims do not serve any purpose. Such old kernels cannot handle current libc, so revert the compatibility code. Make padded syscalls support conditional under the COMPAT6 config option. For COMPAT32, the syscalls were under COMPAT6 already. Remove WITHOUT_SYSCALL_COMPAT build option, which only purpose was to (partially) disable the removed shims. Reviewed by: jhb, imp (previous versions) Discussed with: peter Sponsored by: The FreeBSD Foundation MFC after: 1 week
90 lines
3.1 KiB
C
90 lines
3.1 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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};
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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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