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/*-
* Copyright (c) 2002 Jake Burkholder.
* 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 OR CONTRIBUTORS 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("$FreeBSD$");
#include <sys/types.h>
#include <machine/cpufunc.h>
#include <machine/instr.h>
#include <signal.h>
#include "__sparc_utrap_private.h"
static u_long
__unaligned_load(u_char *p, int size)
{
u_long val;
int i;
val = 0;
for (i = 0; i < size; i++)
val = (val << 8) | p[i];
return (val);
}
static void
__unaligned_store(u_char *p, u_long val, int size)
{
int i;
for (i = 0; i < size; i++)
p[i] = val >> (i * 8);
}
int
__unaligned_fixup(struct utrapframe *uf)
{
u_char *addr;
u_long val;
u_int insn;
int sig;
sig = 0;
addr = (u_char *)uf->uf_sfar;
insn = *(u_int *)uf->uf_pc;
flushw();
switch (IF_OP(insn)) {
case IOP_LDST:
switch (IF_F3_OP3(insn)) {
case INS3_LDUH:
val = __unaligned_load(addr, 2);
__emul_store_reg(uf, IF_F3_RD(insn), val);
break;
case INS3_LDUW:
val = __unaligned_load(addr, 4);
__emul_store_reg(uf, IF_F3_RD(insn), val);
break;
case INS3_LDX:
val = __unaligned_load(addr, 8);
__emul_store_reg(uf, IF_F3_RD(insn), val);
break;
case INS3_LDSH:
val = __unaligned_load(addr, 2);
__emul_store_reg(uf, IF_F3_RD(insn),
IF_SEXT(val, 16));
break;
case INS3_LDSW:
val = __unaligned_load(addr, 4);
__emul_store_reg(uf, IF_F3_RD(insn),
IF_SEXT(val, 32));
break;
case INS3_STH:
val = __emul_fetch_reg(uf, IF_F3_RD(insn));
__unaligned_store(addr, val, 2);
break;
case INS3_STW:
val = __emul_fetch_reg(uf, IF_F3_RD(insn));
__unaligned_store(addr, val, 4);
break;
case INS3_STX:
val = __emul_fetch_reg(uf, IF_F3_RD(insn));
__unaligned_store(addr, val, 8);
break;
default:
sig = SIGILL;
break;
}
break;
default:
sig = SIGILL;
break;
}
return (sig);
}
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