Current Path : /sys/ia64/ia64/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/ia64/ia64/emulate.c |
/*- * Copyright (c) 2006 Marcel Moolenaar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/ia64/ia64/emulate.c 160040 2006-06-29 19:59:18Z marcel $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/proc.h> #include <machine/frame.h> #include <machine/md_var.h> #include <ia64/disasm/disasm.h> int ia64_emulate(struct trapframe *tf, struct thread *td) { struct asm_bundle bundle; struct asm_inst *i; int slot; if (!asm_decode(tf->tf_special.iip, &bundle)) return (SIGILL); slot = ((tf->tf_special.psr & IA64_PSR_RI) == IA64_PSR_RI_0) ? 0 : ((tf->tf_special.psr & IA64_PSR_RI) == IA64_PSR_RI_1) ? 1 : 2; if (slot == 1 && bundle.b_templ[slot] == 'L') slot++; i = bundle.b_inst + slot; switch (i->i_op) { case ASM_OP_BRL: /* * We get the fault even if the predicate is false, so we * need to check the predicate first and simply advance to * the next bundle in that case. */ if (!(tf->tf_special.pr & (1UL << i->i_oper[0].o_value))) { tf->tf_special.psr &= ~IA64_PSR_RI; tf->tf_special.iip += 16; return (0); } /* * The brl.cond is the simplest form. We only have to set * the IP to the address in the instruction and return. */ if (i->i_cmpltr[0].c_type == ASM_CT_COND) { tf->tf_special.psr &= ~IA64_PSR_RI; tf->tf_special.iip += i->i_oper[1].o_value; return (0); } /* Sanity check... */ if (i->i_cmpltr[0].c_type != ASM_CT_CALL) break; /* * The brl.call is more difficult as we need to set-up the * call properly. */ break; default: break; } return (SIGILL); }