118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*-
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* Copyright (c) 2002 Jake Burkholder.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/cpufunc.h>
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#include <machine/instr.h>
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#include <signal.h>
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#include "__sparc_utrap_private.h"
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static u_long
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__unaligned_load(u_char *p, int size)
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{
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u_long val;
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int i;
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val = 0;
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for (i = 0; i < size; i++)
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val = (val << 8) | p[i];
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return (val);
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}
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static void
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__unaligned_store(u_char *p, u_long val, int size)
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{
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int i;
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for (i = 0; i < size; i++)
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p[i] = val >> (i * 8);
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}
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int
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__unaligned_fixup(struct utrapframe *uf)
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{
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u_char *addr;
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u_long val;
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u_int insn;
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int sig;
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sig = 0;
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addr = (u_char *)uf->uf_sfar;
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insn = *(u_int *)uf->uf_pc;
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flushw();
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switch (IF_OP(insn)) {
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case IOP_LDST:
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switch (IF_F3_OP3(insn)) {
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case INS3_LDUH:
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val = __unaligned_load(addr, 2);
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__emul_store_reg(uf, IF_F3_RD(insn), val);
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break;
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case INS3_LDUW:
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val = __unaligned_load(addr, 4);
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__emul_store_reg(uf, IF_F3_RD(insn), val);
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break;
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case INS3_LDX:
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val = __unaligned_load(addr, 8);
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__emul_store_reg(uf, IF_F3_RD(insn), val);
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break;
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case INS3_LDSH:
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val = __unaligned_load(addr, 2);
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__emul_store_reg(uf, IF_F3_RD(insn),
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IF_SEXT(val, 16));
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break;
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case INS3_LDSW:
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val = __unaligned_load(addr, 4);
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__emul_store_reg(uf, IF_F3_RD(insn),
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IF_SEXT(val, 32));
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break;
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case INS3_STH:
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val = __emul_fetch_reg(uf, IF_F3_RD(insn));
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__unaligned_store(addr, val, 2);
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break;
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case INS3_STW:
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val = __emul_fetch_reg(uf, IF_F3_RD(insn));
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__unaligned_store(addr, val, 4);
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break;
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case INS3_STX:
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val = __emul_fetch_reg(uf, IF_F3_RD(insn));
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__unaligned_store(addr, val, 8);
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break;
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default:
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sig = SIGILL;
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break;
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}
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break;
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default:
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sig = SIGILL;
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break;
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}
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return (sig);
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}
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