ibcs2_sysvec.c revision 256281
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: stable/10/sys/i386/ibcs2/ibcs2_sysvec.c 256119 2013-10-07 16:57:48Z dim $"); 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]; 57static int ibcs2_fixup(register_t **, struct image_params *); 58 59struct sysentvec ibcs2_svr3_sysvec = { 60 .sv_size = sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]), 61 .sv_table = ibcs2_sysent, 62 .sv_mask = 0xff, 63 .sv_sigsize = IBCS2_SIGTBLSZ, 64 .sv_sigtbl = bsd_to_ibcs2_sig, 65 .sv_errsize = ELAST + 1, 66 .sv_errtbl = bsd_to_ibcs2_errno, 67 .sv_transtrap = NULL, 68 .sv_fixup = ibcs2_fixup, 69 .sv_sendsig = sendsig, 70 .sv_sigcode = sigcode, /* use generic trampoline */ 71 .sv_szsigcode = &szsigcode, 72 .sv_prepsyscall = NULL, 73 .sv_name = "IBCS2 COFF", 74 .sv_coredump = NULL, /* we don't have a COFF coredump function */ 75 .sv_imgact_try = NULL, 76 .sv_minsigstksz = IBCS2_MINSIGSTKSZ, 77 .sv_pagesize = PAGE_SIZE, 78 .sv_minuser = VM_MIN_ADDRESS, 79 .sv_maxuser = VM_MAXUSER_ADDRESS, 80 .sv_usrstack = USRSTACK, 81 .sv_psstrings = PS_STRINGS, 82 .sv_stackprot = VM_PROT_ALL, 83 .sv_copyout_strings = exec_copyout_strings, 84 .sv_setregs = exec_setregs, 85 .sv_fixlimit = NULL, 86 .sv_maxssiz = NULL, 87 .sv_flags = SV_ABI_UNDEF | SV_IA32 | SV_ILP32, 88 .sv_set_syscall_retval = cpu_set_syscall_retval, 89 .sv_fetch_syscall_args = cpu_fetch_syscall_args, 90 .sv_syscallnames = NULL, 91 .sv_schedtail = NULL, 92}; 93 94static int 95ibcs2_fixup(register_t **stack_base, struct image_params *imgp) 96{ 97 98 return (suword(--(*stack_base), imgp->args->argc)); 99} 100 101/* 102 * Create an "ibcs2" module that does nothing but allow checking for 103 * the presence of the subsystem. 104 */ 105static int 106ibcs2_modevent(module_t mod, int type, void *unused) 107{ 108 struct proc *p = NULL; 109 int rval = 0; 110 111 switch(type) { 112 case MOD_LOAD: 113 break; 114 case MOD_UNLOAD: 115 /* if this was an ELF module we'd use elf_brand_inuse()... */ 116 sx_slock(&allproc_lock); 117 FOREACH_PROC_IN_SYSTEM(p) { 118 if (p->p_sysent == &ibcs2_svr3_sysvec) { 119 rval = EBUSY; 120 break; 121 } 122 } 123 sx_sunlock(&allproc_lock); 124 break; 125 default: 126 rval = EOPNOTSUPP; 127 break; 128 } 129 return (rval); 130} 131static moduledata_t ibcs2_mod = { 132 "ibcs2", 133 ibcs2_modevent, 134 0 135}; 136DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 137