__sparc_utrap_emul.c revision 95587 
1/*-
2 * Copyright (c) 2001 by Thomas Moestl <tmm@FreeBSD.org>.
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
23 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/lib/libc/sparc64/sys/__sparc_utrap_emul.c 95587 2002-04-27 21:56:28Z jake $");
28
29#include <sys/types.h>
30#include <machine/cpufunc.h>
31#include <machine/frame.h>
32#include <machine/instr.h>
33
34#include <signal.h>
35
36#include "__sparc_utrap_private.h"
37#include "fpu_reg.h"
38
39int
40__emul_insn(struct utrapframe *uf)
41{
42	u_long reg, res;
43	u_long *addr;
44	u_int insn;
45	int sig;
46	int rd;
47	int i;
48
49	sig = 0;
50	insn = *(u_int *)uf->uf_pc;
51	flushw();
52	switch (IF_OP(insn)) {
53	case IOP_MISC:
54		switch (IF_F3_OP3(insn)) {
55		case INS2_POPC:
56			if (IF_F3_RS1(insn) != 0) {
57				sig = SIGILL;
58				break;
59			}
60			reg = __emul_f3_op2(uf, insn);
61			for (i = 0; i < 64; i++)
62				res += (reg >> i) & 1;
63			__emul_store_reg(uf, IF_F3_RD(insn), res);
64			break;
65		default:
66			sig = SIGILL;
67			break;
68		}
69		break;
70	case IOP_LDST:
71		switch (IF_F3_OP3(insn)) {
72		case INS3_LDQF:
73			rd = IF_F3_RD(insn);
74			rd = (rd & ~3) | ((rd & 1) << 5);
75			addr = (u_long *)__emul_f3_memop_addr(uf, insn);
76			__fpu_setreg64(rd, addr[0]);
77			__fpu_setreg64(rd + 2, addr[1]);
78			break;
79		case INS3_STQF:
80			rd = IF_F3_RD(insn);
81			rd = (rd & ~3) | ((rd & 1) << 5);
82			addr = (u_long *)__emul_f3_memop_addr(uf, insn);
83			addr[0] = __fpu_getreg64(rd);
84			addr[1] = __fpu_getreg64(rd + 2);
85			break;
86		default:
87			sig = SIGILL;
88			break;
89		}
90		break;
91	default:
92		sig = SIGILL;
93		break;
94	}
95	return (sig);
96}
97
98u_long
99__emul_fetch_reg(struct utrapframe *uf, int reg)
100{
101	struct frame *frm;
102
103	if (reg == IREG_G0)
104		return (0);
105	else if (reg < IREG_O0)	/* global */
106		return (uf->uf_global[reg]);
107	else if (reg < IREG_L0)	/* out */
108		return (uf->uf_out[reg - IREG_O0]);
109	else {			/* local, in */
110		/*
111		 * The in registers are immediately after the locals in
112		 * the frame.
113		 */
114		frm = (struct frame *)(uf->uf_out[6] + SPOFF);
115		return (frm->fr_local[reg - IREG_L0]);
116	}
117}
118
119void
120__emul_store_reg(struct utrapframe *uf, int reg, u_long val)
121{
122	struct frame *frm;
123
124	if (reg == IREG_G0)
125		return;
126	if (reg < IREG_O0)	/* global */
127		uf->uf_global[reg] = val;
128	else if (reg < IREG_L0)	/* out */
129		uf->uf_out[reg - IREG_O0] = val;
130	else {
131		/*
132		 * The in registers are immediately after the locals in
133		 * the frame.
134		 */
135		frm = (struct frame *)(uf->uf_out[6] + SPOFF);
136		frm->fr_local[reg - IREG_L0] = val;
137	}
138}
139
140u_long
141__emul_f3_op2(struct utrapframe *uf, u_int insn)
142{
143
144	if (IF_F3_I(insn) != 0)
145		return (IF_SIMM(insn, 13));
146	else
147		return (__emul_fetch_reg(uf, IF_F3_RS2(insn)));
148}
149
150u_long
151__emul_f3_memop_addr(struct utrapframe *uf, u_int insn)
152{
153	u_long addr;
154
155	addr = __emul_f3_op2(uf, insn) + __emul_fetch_reg(uf, IF_F3_RS1(insn));
156	return (addr);
157}
158