sys/i386/ibcs2/ibcs2_sysvec.c

   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("$FreeBSD$");
  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
  53 MODULE_VERSION(ibcs2, 1);
  54
  55 extern int bsd_to_ibcs2_errno[];
  56 extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
  57 static int ibcs2_fixup(register_t **, struct image_params *);
  58
  59 struct sysentvec ibcs2_svr3_sysvec = {
  60         .sv_size        = nitems(ibcs2_sysent),
  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         .sv_thread_detach = NULL,
  93         .sv_trap        = NULL,
  94 };
  95
  96 static int
  97 ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
  98 {
  99
 100         return (suword(--(*stack_base), imgp->args->argc));
 101 }
 102
 103 /*
 104  * Create an "ibcs2" module that does nothing but allow checking for
 105  * the presence of the subsystem.
 106  */
 107 static int
 108 ibcs2_modevent(module_t mod, int type, void *unused)
 109 {
 110         struct proc *p = NULL;
 111         int rval = 0;
 112
 113         switch(type) {
 114         case MOD_LOAD:
 115                 break;
 116         case MOD_UNLOAD:
 117                 /* if this was an ELF module we'd use elf_brand_inuse()... */
 118                 sx_slock(&allproc_lock);
 119                 FOREACH_PROC_IN_SYSTEM(p) {
 120                         if (p->p_sysent == &ibcs2_svr3_sysvec) {
 121                                 rval = EBUSY;
 122                                 break;
 123                         }
 124                 }
 125                 sx_sunlock(&allproc_lock);
 126                 break;
 127         default:
 128                 rval = EOPNOTSUPP;
 129                 break;
 130         }
 131         return (rval);
 132 }
 133 static moduledata_t ibcs2_mod = {
 134         "ibcs2",
 135         ibcs2_modevent,
 136         0
 137 };
 138 DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);