ibcs2_sysvec.c revision 185169
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 185169 2008-11-22 12:36:15Z kib $"); 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 .sv_size = sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]), 63 .sv_table = ibcs2_sysent, 64 .sv_mask = 0xff, 65 .sv_sigsize = IBCS2_SIGTBLSZ, 66 .sv_sigtbl = bsd_to_ibcs2_sig, 67 .sv_errsize = ELAST + 1, 68 .sv_errtbl = bsd_to_ibcs2_errno, 69 .sv_transtrap = NULL, 70 .sv_fixup = ibcs2_fixup, 71 .sv_sendsig = sendsig, 72 .sv_sigcode = sigcode, /* use generic trampoline */ 73 .sv_szsigcode = &szsigcode, 74 .sv_prepsyscall = NULL, 75 .sv_name = "IBCS2 COFF", 76 .sv_coredump = NULL, /* we don't have a COFF coredump function */ 77 .sv_imgact_try = NULL, 78 .sv_minsigstksz = IBCS2_MINSIGSTKSZ, 79 .sv_pagesize = PAGE_SIZE, 80 .sv_minuser = VM_MIN_ADDRESS, 81 .sv_maxuser = VM_MAXUSER_ADDRESS, 82 .sv_usrstack = USRSTACK, 83 .sv_psstrings = PS_STRINGS, 84 .sv_stackprot = VM_PROT_ALL, 85 .sv_copyout_strings = exec_copyout_strings, 86 .sv_setregs = exec_setregs, 87 .sv_fixlimit = NULL, 88 .sv_maxssiz = NULL, 89 .sv_flags = SV_ABI_UNDEF | SV_IA32 | SV_ILP32 90}; 91 92static int 93ibcs2_fixup(register_t **stack_base, struct image_params *imgp) 94{ 95 96 return (suword(--(*stack_base), imgp->args->argc)); 97} 98 99/* 100 * Create an "ibcs2" module that does nothing but allow checking for 101 * the presence of the subsystem. 102 */ 103static int 104ibcs2_modevent(module_t mod, int type, void *unused) 105{ 106 struct proc *p = NULL; 107 int rval = 0; 108 109 switch(type) { 110 case MOD_LOAD: 111 break; 112 case MOD_UNLOAD: 113 /* if this was an ELF module we'd use elf_brand_inuse()... */ 114 sx_slock(&allproc_lock); 115 FOREACH_PROC_IN_SYSTEM(p) { 116 if (p->p_sysent == &ibcs2_svr3_sysvec) { 117 rval = EBUSY; 118 break; 119 } 120 } 121 sx_sunlock(&allproc_lock); 122 break; 123 default: 124 rval = EOPNOTSUPP; 125 break; 126 } 127 return (rval); 128} 129static moduledata_t ibcs2_mod = { 130 "ibcs2", 131 ibcs2_modevent, 132 0 133}; 134DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 135