bd000d73ad
----------------------------- The compatibility code and/or emulators have been updated: iBCS2 now mostly uses the older syscalls. SVR4 now properly handles all signals. This has been achieved by using the new sigset_t throughout the emulator. The Linuxulator has been severely updated. Internally the new Linux sigset_t is made the default. These are then mapped to and from the new FreeBSD sigset_t. Also, rt_sigsuspend has been implemented in the Linuxulator. Implementing this syscall basicly caused all this sigset_t changing in the first place and the syscall has been used throughout the change as a means for testing. It basicly is too much work to undo the implementation so that it can later be added again. A special note on the use of sv_sigtbl and sv_sigsize in struct sysentvec: Every signal larger than sv_sigsize is not translated and is passed on to the signal handler unmodified. Signals in the range 1 upto and including sv_sigsize are translated. The rationale is that only the system defined signals need to be translated. The emulators also have been updated so that the translation tables are only indexed for valid (system defined) signals. This change also fixes the translation bug already in the SVR4 emulator.
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/*
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* Copyright (c) 1995 Steven Wallace
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* All rights reserved.
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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, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Steven Wallace.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysent.h>
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#include <sys/signalvar.h>
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#include <sys/proc.h>
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#include <i386/ibcs2/ibcs2_syscall.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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extern int bsd_to_ibcs2_errno[];
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extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
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extern int szsigcode;
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extern char sigcode[];
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struct sysentvec ibcs2_svr3_sysvec = {
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sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
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ibcs2_sysent,
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0xFF,
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IBCS2_SIGTBLSZ,
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bsd_to_ibcs2_sig,
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ELAST + 1,
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bsd_to_ibcs2_errno,
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0, /* trap-to-signal translation function */
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0, /* fixup */
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sendsig,
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sigcode, /* use generic trampoline */
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&szsigcode, /* use generic trampoline size */
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0, /* prepsyscall */
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"IBCS2 COFF",
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NULL /* we don't have a COFF coredump function */
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};
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/*
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* Create an "ibcs2" module that does nothing but allow checking for
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* the presence of the subsystem.
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*/
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static int
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ibcs2_modevent(module_t mod, int type, void *unused)
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{
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struct proc *p = NULL;
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switch(type) {
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case MOD_UNLOAD:
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/* if this was an ELF module we'd use elf_brand_inuse()... */
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for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
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if (p->p_sysent == &ibcs2_svr3_sysvec)
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return EBUSY;
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}
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default:
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/* do not care */
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}
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return 0;
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}
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static moduledata_t ibcs2_mod = {
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"ibcs2",
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ibcs2_modevent,
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0
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};
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DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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