806d7daafe
syscall compare against a variable sv_minsigstksz in struct sysentvec as to properly take the size of the machine- and ABI dependent struct sigframe into account. The SVR4 and iBCS2 modules continue to have a minsigstksz of 8192 to preserve behavior. The real values (if different) are not known at this time. Other ABI modules use the real values. The native MINSIGSTKSZ is now defined as follows: Arch MINSIGSTKSZ ---- ----------- alpha 4096 i386 2048 ia64 12288 Reviewed by: mjacob Suggested by: bde
137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/*-
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* Copyright (c) 1998-1999 Andrew Gallatin
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* All rights reserved.
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*
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* Based heavily on linux_sysvec.c
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* Which is Copyright (c) 1994-1996 Søren Schmidt
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough 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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/* XXX we use functions that might not exist. */
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#include "opt_compat.h"
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#ifndef COMPAT_43
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#error "Unable to compile Osf1-emulator due to missing COMPAT_43 option!"
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#endif
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/sysent.h>
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#include <sys/imgact.h>
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#include <sys/imgact_aout.h>
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#include <sys/imgact_elf.h>
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#include <sys/malloc.h>
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#include <alpha/osf1/exec_ecoff.h>
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#include <alpha/osf1/osf1_signal.h>
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#include <alpha/osf1/osf1_syscall.h>
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#include <alpha/osf1/osf1_util.h>
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#include <alpha/osf1/osf1.h>
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MODULE_VERSION(osf1, 1);
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int osf1_szsigcode;
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extern char sigcode[];
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static int osf1_freebsd_fixup __P((long **stack_base,
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struct image_params *imgp));
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struct sysentvec osf1_sysvec = {
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OSF1_SYS_MAXSYSCALL,
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osf1_sysent,
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0x0,
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NSIG,
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bsd_to_osf1_sig,
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0,
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0,
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0, /* trap-to-signal translation function */
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osf1_freebsd_fixup, /* fixup */
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osf1_sendsig,
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sigcode, /* use generic trampoline */
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&osf1_szsigcode, /* use generic trampoline size */
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0, /* prepsyscall */
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"OSF/1 ECOFF",
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NULL, /* we don't have an ECOFF coredump function */
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NULL,
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OSF1_MINSIGSTKSZ
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};
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/*
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* Do some magic to setup the stack properly for the osf1 dynamic loader
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* OSF/1 binaries need an auxargs vector describing the name of the
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* executable (must be a full path).
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*
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* If we're executing a dynamic binary, the loader will expect its
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* name, /sbin/loader, to be in the auxargs vectore as well.
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* Bear in mind that when we execute a dynamic binary, we begin by
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* executing the loader. The loader then takes care of mapping
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* executable (which is why it needs the full path)
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* and its requisite shared libs, then it transfers control
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* to the executable after calling set_program_attributes().
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*/
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#define AUXARGS_ENTRY(pos, id, val) {suword(pos++, id); suword(pos++, val);}
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static int
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osf1_freebsd_fixup(long **stack_base, struct image_params *imgp)
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{
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char *destp;
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int sz;
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long *pos;
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struct ps_strings *arginfo;
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Osf_Auxargs *args;
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args = (Osf_Auxargs *)imgp->auxargs;
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pos = *stack_base + (imgp->argc + imgp->envc + 2);
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arginfo = (struct ps_strings *)PS_STRINGS;
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sz = *(imgp->proc->p_sysent->sv_szsigcode);
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destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE -
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roundup((ARG_MAX - imgp->stringspace), sizeof(char *));
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destp -= imgp->stringspace;
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destp -= strlen(args->executable)+2;
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copyout(args->executable, destp, strlen(args->executable)+1);
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AUXARGS_ENTRY(pos, OSF1_EXEC_NAME, (long)destp);
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if (args->loader) {
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/* the loader seems to want the name here, then it overwrites it with
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the FD of the executable. I have NFC what's going on here.. */
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AUXARGS_ENTRY(pos, OSF1_EXEC_NAME, (long)destp);
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destp-= (strlen("/sbin/loader")+1);
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copyout("/sbin/loader", destp, strlen("/sbin/loader")+1);
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AUXARGS_ENTRY(pos, OSF1_LOADER_NAME, (long)destp);
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AUXARGS_ENTRY(pos, OSF1_LOADER_FLAGS, 0);
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}
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free(imgp->auxargs, M_TEMP);
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imgp->auxargs = NULL;
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(*stack_base)--;
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**stack_base = (long)imgp->argc;
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return 0;
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}
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