2 * Copyright (c) 2006 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <machine/frame.h>
35 #include <machine/md_var.h>
37 #include <ia64/disasm/disasm.h>
40 ia64_emulate(struct trapframe *tf, struct thread *td)
42 struct asm_bundle bundle;
46 if (!asm_decode(tf->tf_special.iip, &bundle))
49 slot = ((tf->tf_special.psr & IA64_PSR_RI) == IA64_PSR_RI_0) ? 0 :
50 ((tf->tf_special.psr & IA64_PSR_RI) == IA64_PSR_RI_1) ? 1 : 2;
51 if (slot == 1 && bundle.b_templ[slot] == 'L')
54 i = bundle.b_inst + slot;
58 * We get the fault even if the predicate is false, so we
59 * need to check the predicate first and simply advance to
60 * the next bundle in that case.
62 if (!(tf->tf_special.pr & (1UL << i->i_oper[0].o_value))) {
63 tf->tf_special.psr &= ~IA64_PSR_RI;
64 tf->tf_special.iip += 16;
68 * The brl.cond is the simplest form. We only have to set
69 * the IP to the address in the instruction and return.
71 if (i->i_cmpltr[0].c_type == ASM_CT_COND) {
72 tf->tf_special.psr &= ~IA64_PSR_RI;
73 tf->tf_special.iip += i->i_oper[1].o_value;
77 if (i->i_cmpltr[0].c_type != ASM_CT_CALL)
80 * The brl.call is more difficult as we need to set-up the