ibcs2_sysvec.c revision 139799
1/*- 2 * Copyright (c) 1995 Steven Wallace 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Steven Wallace. 16 * 4. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/i386/ibcs2/ibcs2_sysvec.c 139799 2005-01-06 23:22:04Z imp $"); 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/exec.h> 38#include <sys/imgact.h> 39#include <sys/lock.h> 40#include <sys/module.h> 41#include <sys/sysent.h> 42#include <sys/signalvar.h> 43#include <sys/proc.h> 44#include <sys/sx.h> 45 46#include <vm/vm.h> 47#include <vm/pmap.h> 48#include <vm/vm_param.h> 49 50#include <i386/ibcs2/ibcs2_syscall.h> 51#include <i386/ibcs2/ibcs2_signal.h> 52 53MODULE_VERSION(ibcs2, 1); 54 55extern int bsd_to_ibcs2_errno[]; 56extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL]; 57extern int szsigcode; 58extern char sigcode[]; 59static int ibcs2_fixup(register_t **, struct image_params *); 60 61struct sysentvec ibcs2_svr3_sysvec = { 62 sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]), 63 ibcs2_sysent, 64 0xFF, 65 IBCS2_SIGTBLSZ, 66 bsd_to_ibcs2_sig, 67 ELAST + 1, 68 bsd_to_ibcs2_errno, 69 NULL, /* trap-to-signal translation function */ 70 ibcs2_fixup, /* fixup */ 71 sendsig, 72 sigcode, /* use generic trampoline */ 73 &szsigcode, /* use generic trampoline size */ 74 NULL, /* prepsyscall */ 75 "IBCS2 COFF", 76 NULL, /* we don't have a COFF coredump function */ 77 NULL, 78 IBCS2_MINSIGSTKSZ, 79 PAGE_SIZE, 80 VM_MIN_ADDRESS, 81 VM_MAXUSER_ADDRESS, 82 USRSTACK, 83 PS_STRINGS, 84 VM_PROT_ALL, 85 exec_copyout_strings, 86 exec_setregs, 87 NULL 88}; 89 90static int 91ibcs2_fixup(register_t **stack_base, struct image_params *imgp) 92{ 93 94 return (suword(--(*stack_base), imgp->argc)); 95} 96 97/* 98 * Create an "ibcs2" module that does nothing but allow checking for 99 * the presence of the subsystem. 100 */ 101static int 102ibcs2_modevent(module_t mod, int type, void *unused) 103{ 104 struct proc *p = NULL; 105 int rval = 0; 106 107 switch(type) { 108 case MOD_UNLOAD: 109 /* if this was an ELF module we'd use elf_brand_inuse()... */ 110 sx_slock(&allproc_lock); 111 LIST_FOREACH(p, &allproc, p_list) { 112 if (p->p_sysent == &ibcs2_svr3_sysvec) { 113 rval = EBUSY; 114 break; 115 } 116 } 117 sx_sunlock(&allproc_lock); 118 default: 119 return (EOPNOTSUPP); 120 break; 121 } 122 return (rval); 123} 124static moduledata_t ibcs2_mod = { 125 "ibcs2", 126 ibcs2_modevent, 127 0 128}; 129DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 130