766 lines
18 KiB
C
766 lines
18 KiB
C
/*
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* Unaligned memory access handler
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*
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* Copyright (C) 2001 Randolph Chung <tausq@debian.org>
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* Significantly tweaked by LaMont Jones <lamont@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched/signal.h>
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#include <linux/sched/debug.h>
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#include <linux/signal.h>
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#include <linux/ratelimit.h>
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#include <linux/uaccess.h>
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#include <asm/hardirq.h>
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#include <asm/traps.h>
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/* #define DEBUG_UNALIGNED 1 */
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#ifdef DEBUG_UNALIGNED
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#define DPRINTF(fmt, args...) do { printk(KERN_DEBUG "%s:%d:%s ", __FILE__, __LINE__, __func__ ); printk(KERN_DEBUG fmt, ##args ); } while (0)
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#else
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#define DPRINTF(fmt, args...)
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#endif
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#ifdef CONFIG_64BIT
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#define RFMT "%016lx"
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#else
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#define RFMT "%08lx"
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#endif
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#define FIXUP_BRANCH(lbl) \
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"\tldil L%%" #lbl ", %%r1\n" \
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"\tldo R%%" #lbl "(%%r1), %%r1\n" \
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"\tbv,n %%r0(%%r1)\n"
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/* If you use FIXUP_BRANCH, then you must list this clobber */
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#define FIXUP_BRANCH_CLOBBER "r1"
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/* 1111 1100 0000 0000 0001 0011 1100 0000 */
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#define OPCODE1(a,b,c) ((a)<<26|(b)<<12|(c)<<6)
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#define OPCODE2(a,b) ((a)<<26|(b)<<1)
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#define OPCODE3(a,b) ((a)<<26|(b)<<2)
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#define OPCODE4(a) ((a)<<26)
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#define OPCODE1_MASK OPCODE1(0x3f,1,0xf)
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#define OPCODE2_MASK OPCODE2(0x3f,1)
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#define OPCODE3_MASK OPCODE3(0x3f,1)
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#define OPCODE4_MASK OPCODE4(0x3f)
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/* skip LDB - never unaligned (index) */
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#define OPCODE_LDH_I OPCODE1(0x03,0,0x1)
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#define OPCODE_LDW_I OPCODE1(0x03,0,0x2)
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#define OPCODE_LDD_I OPCODE1(0x03,0,0x3)
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#define OPCODE_LDDA_I OPCODE1(0x03,0,0x4)
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#define OPCODE_LDCD_I OPCODE1(0x03,0,0x5)
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#define OPCODE_LDWA_I OPCODE1(0x03,0,0x6)
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#define OPCODE_LDCW_I OPCODE1(0x03,0,0x7)
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/* skip LDB - never unaligned (short) */
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#define OPCODE_LDH_S OPCODE1(0x03,1,0x1)
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#define OPCODE_LDW_S OPCODE1(0x03,1,0x2)
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#define OPCODE_LDD_S OPCODE1(0x03,1,0x3)
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#define OPCODE_LDDA_S OPCODE1(0x03,1,0x4)
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#define OPCODE_LDCD_S OPCODE1(0x03,1,0x5)
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#define OPCODE_LDWA_S OPCODE1(0x03,1,0x6)
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#define OPCODE_LDCW_S OPCODE1(0x03,1,0x7)
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/* skip STB - never unaligned */
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#define OPCODE_STH OPCODE1(0x03,1,0x9)
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#define OPCODE_STW OPCODE1(0x03,1,0xa)
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#define OPCODE_STD OPCODE1(0x03,1,0xb)
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/* skip STBY - never unaligned */
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/* skip STDBY - never unaligned */
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#define OPCODE_STWA OPCODE1(0x03,1,0xe)
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#define OPCODE_STDA OPCODE1(0x03,1,0xf)
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#define OPCODE_FLDWX OPCODE1(0x09,0,0x0)
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#define OPCODE_FLDWXR OPCODE1(0x09,0,0x1)
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#define OPCODE_FSTWX OPCODE1(0x09,0,0x8)
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#define OPCODE_FSTWXR OPCODE1(0x09,0,0x9)
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#define OPCODE_FLDWS OPCODE1(0x09,1,0x0)
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#define OPCODE_FLDWSR OPCODE1(0x09,1,0x1)
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#define OPCODE_FSTWS OPCODE1(0x09,1,0x8)
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#define OPCODE_FSTWSR OPCODE1(0x09,1,0x9)
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#define OPCODE_FLDDX OPCODE1(0x0b,0,0x0)
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#define OPCODE_FSTDX OPCODE1(0x0b,0,0x8)
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#define OPCODE_FLDDS OPCODE1(0x0b,1,0x0)
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#define OPCODE_FSTDS OPCODE1(0x0b,1,0x8)
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#define OPCODE_LDD_L OPCODE2(0x14,0)
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#define OPCODE_FLDD_L OPCODE2(0x14,1)
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#define OPCODE_STD_L OPCODE2(0x1c,0)
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#define OPCODE_FSTD_L OPCODE2(0x1c,1)
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#define OPCODE_LDW_M OPCODE3(0x17,1)
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#define OPCODE_FLDW_L OPCODE3(0x17,0)
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#define OPCODE_FSTW_L OPCODE3(0x1f,0)
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#define OPCODE_STW_M OPCODE3(0x1f,1)
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#define OPCODE_LDH_L OPCODE4(0x11)
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#define OPCODE_LDW_L OPCODE4(0x12)
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#define OPCODE_LDWM OPCODE4(0x13)
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#define OPCODE_STH_L OPCODE4(0x19)
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#define OPCODE_STW_L OPCODE4(0x1A)
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#define OPCODE_STWM OPCODE4(0x1B)
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#define MAJOR_OP(i) (((i)>>26)&0x3f)
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#define R1(i) (((i)>>21)&0x1f)
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#define R2(i) (((i)>>16)&0x1f)
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#define R3(i) ((i)&0x1f)
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#define FR3(i) ((((i)<<1)&0x1f)|(((i)>>6)&1))
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#define IM(i,n) (((i)>>1&((1<<(n-1))-1))|((i)&1?((0-1L)<<(n-1)):0))
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#define IM5_2(i) IM((i)>>16,5)
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#define IM5_3(i) IM((i),5)
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#define IM14(i) IM((i),14)
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#define ERR_NOTHANDLED -1
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#define ERR_PAGEFAULT -2
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int unaligned_enabled __read_mostly = 1;
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static int emulate_ldh(struct pt_regs *regs, int toreg)
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{
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unsigned long saddr = regs->ior;
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unsigned long val = 0;
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int ret;
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DPRINTF("load " RFMT ":" RFMT " to r%d for 2 bytes\n",
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regs->isr, regs->ior, toreg);
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__asm__ __volatile__ (
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" mtsp %4, %%sr1\n"
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"1: ldbs 0(%%sr1,%3), %%r20\n"
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"2: ldbs 1(%%sr1,%3), %0\n"
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" depw %%r20, 23, 24, %0\n"
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" copy %%r0, %1\n"
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"3: \n"
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" .section .fixup,\"ax\"\n"
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"4: ldi -2, %1\n"
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FIXUP_BRANCH(3b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b, 4b)
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ASM_EXCEPTIONTABLE_ENTRY(2b, 4b)
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: "=r" (val), "=r" (ret)
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: "0" (val), "r" (saddr), "r" (regs->isr)
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: "r20", FIXUP_BRANCH_CLOBBER );
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DPRINTF("val = 0x" RFMT "\n", val);
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if (toreg)
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regs->gr[toreg] = val;
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return ret;
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}
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static int emulate_ldw(struct pt_regs *regs, int toreg, int flop)
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{
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unsigned long saddr = regs->ior;
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unsigned long val = 0;
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int ret;
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DPRINTF("load " RFMT ":" RFMT " to r%d for 4 bytes\n",
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regs->isr, regs->ior, toreg);
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__asm__ __volatile__ (
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" zdep %3,28,2,%%r19\n" /* r19=(ofs&3)*8 */
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" mtsp %4, %%sr1\n"
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" depw %%r0,31,2,%3\n"
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"1: ldw 0(%%sr1,%3),%0\n"
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"2: ldw 4(%%sr1,%3),%%r20\n"
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" subi 32,%%r19,%%r19\n"
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" mtctl %%r19,11\n"
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" vshd %0,%%r20,%0\n"
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" copy %%r0, %1\n"
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"3: \n"
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" .section .fixup,\"ax\"\n"
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"4: ldi -2, %1\n"
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FIXUP_BRANCH(3b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b, 4b)
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ASM_EXCEPTIONTABLE_ENTRY(2b, 4b)
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: "=r" (val), "=r" (ret)
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: "0" (val), "r" (saddr), "r" (regs->isr)
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: "r19", "r20", FIXUP_BRANCH_CLOBBER );
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DPRINTF("val = 0x" RFMT "\n", val);
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if (flop)
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((__u32*)(regs->fr))[toreg] = val;
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else if (toreg)
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regs->gr[toreg] = val;
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return ret;
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}
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static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
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{
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unsigned long saddr = regs->ior;
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__u64 val = 0;
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int ret;
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DPRINTF("load " RFMT ":" RFMT " to r%d for 8 bytes\n",
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regs->isr, regs->ior, toreg);
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#ifdef CONFIG_PA20
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#ifndef CONFIG_64BIT
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if (!flop)
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return -1;
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#endif
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__asm__ __volatile__ (
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" depd,z %3,60,3,%%r19\n" /* r19=(ofs&7)*8 */
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" mtsp %4, %%sr1\n"
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" depd %%r0,63,3,%3\n"
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"1: ldd 0(%%sr1,%3),%0\n"
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"2: ldd 8(%%sr1,%3),%%r20\n"
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" subi 64,%%r19,%%r19\n"
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" mtsar %%r19\n"
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" shrpd %0,%%r20,%%sar,%0\n"
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" copy %%r0, %1\n"
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"3: \n"
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" .section .fixup,\"ax\"\n"
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"4: ldi -2, %1\n"
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FIXUP_BRANCH(3b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
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ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
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: "=r" (val), "=r" (ret)
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: "0" (val), "r" (saddr), "r" (regs->isr)
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: "r19", "r20", FIXUP_BRANCH_CLOBBER );
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#else
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{
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unsigned long valh=0,vall=0;
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__asm__ __volatile__ (
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" zdep %5,29,2,%%r19\n" /* r19=(ofs&3)*8 */
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" mtsp %6, %%sr1\n"
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" dep %%r0,31,2,%5\n"
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"1: ldw 0(%%sr1,%5),%0\n"
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"2: ldw 4(%%sr1,%5),%1\n"
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"3: ldw 8(%%sr1,%5),%%r20\n"
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" subi 32,%%r19,%%r19\n"
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" mtsar %%r19\n"
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" vshd %0,%1,%0\n"
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" vshd %1,%%r20,%1\n"
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" copy %%r0, %2\n"
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"4: \n"
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" .section .fixup,\"ax\"\n"
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"5: ldi -2, %2\n"
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FIXUP_BRANCH(4b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b,5b)
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ASM_EXCEPTIONTABLE_ENTRY(2b,5b)
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ASM_EXCEPTIONTABLE_ENTRY(3b,5b)
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: "=r" (valh), "=r" (vall), "=r" (ret)
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: "0" (valh), "1" (vall), "r" (saddr), "r" (regs->isr)
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: "r19", "r20", FIXUP_BRANCH_CLOBBER );
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val=((__u64)valh<<32)|(__u64)vall;
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}
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#endif
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DPRINTF("val = 0x%llx\n", val);
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if (flop)
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regs->fr[toreg] = val;
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else if (toreg)
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regs->gr[toreg] = val;
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return ret;
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}
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static int emulate_sth(struct pt_regs *regs, int frreg)
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{
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unsigned long val = regs->gr[frreg];
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int ret;
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if (!frreg)
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val = 0;
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DPRINTF("store r%d (0x" RFMT ") to " RFMT ":" RFMT " for 2 bytes\n", frreg,
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val, regs->isr, regs->ior);
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__asm__ __volatile__ (
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" mtsp %3, %%sr1\n"
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" extrw,u %1, 23, 8, %%r19\n"
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"1: stb %1, 1(%%sr1, %2)\n"
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"2: stb %%r19, 0(%%sr1, %2)\n"
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" copy %%r0, %0\n"
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"3: \n"
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" .section .fixup,\"ax\"\n"
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"4: ldi -2, %0\n"
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FIXUP_BRANCH(3b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
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ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
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: "=r" (ret)
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: "r" (val), "r" (regs->ior), "r" (regs->isr)
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: "r19", FIXUP_BRANCH_CLOBBER );
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return ret;
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}
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static int emulate_stw(struct pt_regs *regs, int frreg, int flop)
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{
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unsigned long val;
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int ret;
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if (flop)
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val = ((__u32*)(regs->fr))[frreg];
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else if (frreg)
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val = regs->gr[frreg];
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else
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val = 0;
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DPRINTF("store r%d (0x" RFMT ") to " RFMT ":" RFMT " for 4 bytes\n", frreg,
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val, regs->isr, regs->ior);
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__asm__ __volatile__ (
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" mtsp %3, %%sr1\n"
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" zdep %2, 28, 2, %%r19\n"
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" dep %%r0, 31, 2, %2\n"
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" mtsar %%r19\n"
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" depwi,z -2, %%sar, 32, %%r19\n"
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"1: ldw 0(%%sr1,%2),%%r20\n"
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"2: ldw 4(%%sr1,%2),%%r21\n"
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" vshd %%r0, %1, %%r22\n"
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" vshd %1, %%r0, %%r1\n"
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" and %%r20, %%r19, %%r20\n"
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" andcm %%r21, %%r19, %%r21\n"
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" or %%r22, %%r20, %%r20\n"
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" or %%r1, %%r21, %%r21\n"
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" stw %%r20,0(%%sr1,%2)\n"
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" stw %%r21,4(%%sr1,%2)\n"
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" copy %%r0, %0\n"
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"3: \n"
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" .section .fixup,\"ax\"\n"
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"4: ldi -2, %0\n"
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FIXUP_BRANCH(3b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
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ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
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: "=r" (ret)
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: "r" (val), "r" (regs->ior), "r" (regs->isr)
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: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
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return 0;
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}
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static int emulate_std(struct pt_regs *regs, int frreg, int flop)
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{
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__u64 val;
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int ret;
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if (flop)
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val = regs->fr[frreg];
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else if (frreg)
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val = regs->gr[frreg];
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else
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val = 0;
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DPRINTF("store r%d (0x%016llx) to " RFMT ":" RFMT " for 8 bytes\n", frreg,
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val, regs->isr, regs->ior);
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#ifdef CONFIG_PA20
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#ifndef CONFIG_64BIT
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if (!flop)
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return -1;
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#endif
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__asm__ __volatile__ (
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" mtsp %3, %%sr1\n"
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" depd,z %2, 60, 3, %%r19\n"
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" depd %%r0, 63, 3, %2\n"
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" mtsar %%r19\n"
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" depdi,z -2, %%sar, 64, %%r19\n"
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"1: ldd 0(%%sr1,%2),%%r20\n"
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"2: ldd 8(%%sr1,%2),%%r21\n"
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" shrpd %%r0, %1, %%sar, %%r22\n"
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" shrpd %1, %%r0, %%sar, %%r1\n"
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" and %%r20, %%r19, %%r20\n"
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" andcm %%r21, %%r19, %%r21\n"
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" or %%r22, %%r20, %%r20\n"
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" or %%r1, %%r21, %%r21\n"
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"3: std %%r20,0(%%sr1,%2)\n"
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"4: std %%r21,8(%%sr1,%2)\n"
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" copy %%r0, %0\n"
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"5: \n"
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" .section .fixup,\"ax\"\n"
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"6: ldi -2, %0\n"
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FIXUP_BRANCH(5b)
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" .previous\n"
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ASM_EXCEPTIONTABLE_ENTRY(1b,6b)
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ASM_EXCEPTIONTABLE_ENTRY(2b,6b)
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ASM_EXCEPTIONTABLE_ENTRY(3b,6b)
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ASM_EXCEPTIONTABLE_ENTRY(4b,6b)
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: "=r" (ret)
|
|
: "r" (val), "r" (regs->ior), "r" (regs->isr)
|
|
: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
|
|
#else
|
|
{
|
|
unsigned long valh=(val>>32),vall=(val&0xffffffffl);
|
|
__asm__ __volatile__ (
|
|
" mtsp %4, %%sr1\n"
|
|
" zdep %2, 29, 2, %%r19\n"
|
|
" dep %%r0, 31, 2, %2\n"
|
|
" mtsar %%r19\n"
|
|
" zvdepi -2, 32, %%r19\n"
|
|
"1: ldw 0(%%sr1,%3),%%r20\n"
|
|
"2: ldw 8(%%sr1,%3),%%r21\n"
|
|
" vshd %1, %2, %%r1\n"
|
|
" vshd %%r0, %1, %1\n"
|
|
" vshd %2, %%r0, %2\n"
|
|
" and %%r20, %%r19, %%r20\n"
|
|
" andcm %%r21, %%r19, %%r21\n"
|
|
" or %1, %%r20, %1\n"
|
|
" or %2, %%r21, %2\n"
|
|
"3: stw %1,0(%%sr1,%1)\n"
|
|
"4: stw %%r1,4(%%sr1,%3)\n"
|
|
"5: stw %2,8(%%sr1,%3)\n"
|
|
" copy %%r0, %0\n"
|
|
"6: \n"
|
|
" .section .fixup,\"ax\"\n"
|
|
"7: ldi -2, %0\n"
|
|
FIXUP_BRANCH(6b)
|
|
" .previous\n"
|
|
ASM_EXCEPTIONTABLE_ENTRY(1b,7b)
|
|
ASM_EXCEPTIONTABLE_ENTRY(2b,7b)
|
|
ASM_EXCEPTIONTABLE_ENTRY(3b,7b)
|
|
ASM_EXCEPTIONTABLE_ENTRY(4b,7b)
|
|
ASM_EXCEPTIONTABLE_ENTRY(5b,7b)
|
|
: "=r" (ret)
|
|
: "r" (valh), "r" (vall), "r" (regs->ior), "r" (regs->isr)
|
|
: "r19", "r20", "r21", "r1", FIXUP_BRANCH_CLOBBER );
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
void handle_unaligned(struct pt_regs *regs)
|
|
{
|
|
static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
|
|
unsigned long newbase = R1(regs->iir)?regs->gr[R1(regs->iir)]:0;
|
|
int modify = 0;
|
|
int ret = ERR_NOTHANDLED;
|
|
struct siginfo si;
|
|
register int flop=0; /* true if this is a flop */
|
|
|
|
__inc_irq_stat(irq_unaligned_count);
|
|
|
|
/* log a message with pacing */
|
|
if (user_mode(regs)) {
|
|
if (current->thread.flags & PARISC_UAC_SIGBUS) {
|
|
goto force_sigbus;
|
|
}
|
|
|
|
if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
|
|
__ratelimit(&ratelimit)) {
|
|
char buf[256];
|
|
sprintf(buf, "%s(%d): unaligned access to 0x" RFMT " at ip=0x" RFMT "\n",
|
|
current->comm, task_pid_nr(current), regs->ior, regs->iaoq[0]);
|
|
printk(KERN_WARNING "%s", buf);
|
|
#ifdef DEBUG_UNALIGNED
|
|
show_regs(regs);
|
|
#endif
|
|
}
|
|
|
|
if (!unaligned_enabled)
|
|
goto force_sigbus;
|
|
}
|
|
|
|
/* handle modification - OK, it's ugly, see the instruction manual */
|
|
switch (MAJOR_OP(regs->iir))
|
|
{
|
|
case 0x03:
|
|
case 0x09:
|
|
case 0x0b:
|
|
if (regs->iir&0x20)
|
|
{
|
|
modify = 1;
|
|
if (regs->iir&0x1000) /* short loads */
|
|
if (regs->iir&0x200)
|
|
newbase += IM5_3(regs->iir);
|
|
else
|
|
newbase += IM5_2(regs->iir);
|
|
else if (regs->iir&0x2000) /* scaled indexed */
|
|
{
|
|
int shift=0;
|
|
switch (regs->iir & OPCODE1_MASK)
|
|
{
|
|
case OPCODE_LDH_I:
|
|
shift= 1; break;
|
|
case OPCODE_LDW_I:
|
|
shift= 2; break;
|
|
case OPCODE_LDD_I:
|
|
case OPCODE_LDDA_I:
|
|
shift= 3; break;
|
|
}
|
|
newbase += (R2(regs->iir)?regs->gr[R2(regs->iir)]:0)<<shift;
|
|
} else /* simple indexed */
|
|
newbase += (R2(regs->iir)?regs->gr[R2(regs->iir)]:0);
|
|
}
|
|
break;
|
|
case 0x13:
|
|
case 0x1b:
|
|
modify = 1;
|
|
newbase += IM14(regs->iir);
|
|
break;
|
|
case 0x14:
|
|
case 0x1c:
|
|
if (regs->iir&8)
|
|
{
|
|
modify = 1;
|
|
newbase += IM14(regs->iir&~0xe);
|
|
}
|
|
break;
|
|
case 0x16:
|
|
case 0x1e:
|
|
modify = 1;
|
|
newbase += IM14(regs->iir&6);
|
|
break;
|
|
case 0x17:
|
|
case 0x1f:
|
|
if (regs->iir&4)
|
|
{
|
|
modify = 1;
|
|
newbase += IM14(regs->iir&~4);
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* TODO: make this cleaner... */
|
|
switch (regs->iir & OPCODE1_MASK)
|
|
{
|
|
case OPCODE_LDH_I:
|
|
case OPCODE_LDH_S:
|
|
ret = emulate_ldh(regs, R3(regs->iir));
|
|
break;
|
|
|
|
case OPCODE_LDW_I:
|
|
case OPCODE_LDWA_I:
|
|
case OPCODE_LDW_S:
|
|
case OPCODE_LDWA_S:
|
|
ret = emulate_ldw(regs, R3(regs->iir),0);
|
|
break;
|
|
|
|
case OPCODE_STH:
|
|
ret = emulate_sth(regs, R2(regs->iir));
|
|
break;
|
|
|
|
case OPCODE_STW:
|
|
case OPCODE_STWA:
|
|
ret = emulate_stw(regs, R2(regs->iir),0);
|
|
break;
|
|
|
|
#ifdef CONFIG_PA20
|
|
case OPCODE_LDD_I:
|
|
case OPCODE_LDDA_I:
|
|
case OPCODE_LDD_S:
|
|
case OPCODE_LDDA_S:
|
|
ret = emulate_ldd(regs, R3(regs->iir),0);
|
|
break;
|
|
|
|
case OPCODE_STD:
|
|
case OPCODE_STDA:
|
|
ret = emulate_std(regs, R2(regs->iir),0);
|
|
break;
|
|
#endif
|
|
|
|
case OPCODE_FLDWX:
|
|
case OPCODE_FLDWS:
|
|
case OPCODE_FLDWXR:
|
|
case OPCODE_FLDWSR:
|
|
flop=1;
|
|
ret = emulate_ldw(regs,FR3(regs->iir),1);
|
|
break;
|
|
|
|
case OPCODE_FLDDX:
|
|
case OPCODE_FLDDS:
|
|
flop=1;
|
|
ret = emulate_ldd(regs,R3(regs->iir),1);
|
|
break;
|
|
|
|
case OPCODE_FSTWX:
|
|
case OPCODE_FSTWS:
|
|
case OPCODE_FSTWXR:
|
|
case OPCODE_FSTWSR:
|
|
flop=1;
|
|
ret = emulate_stw(regs,FR3(regs->iir),1);
|
|
break;
|
|
|
|
case OPCODE_FSTDX:
|
|
case OPCODE_FSTDS:
|
|
flop=1;
|
|
ret = emulate_std(regs,R3(regs->iir),1);
|
|
break;
|
|
|
|
case OPCODE_LDCD_I:
|
|
case OPCODE_LDCW_I:
|
|
case OPCODE_LDCD_S:
|
|
case OPCODE_LDCW_S:
|
|
ret = ERR_NOTHANDLED; /* "undefined", but lets kill them. */
|
|
break;
|
|
}
|
|
#ifdef CONFIG_PA20
|
|
switch (regs->iir & OPCODE2_MASK)
|
|
{
|
|
case OPCODE_FLDD_L:
|
|
flop=1;
|
|
ret = emulate_ldd(regs,R2(regs->iir),1);
|
|
break;
|
|
case OPCODE_FSTD_L:
|
|
flop=1;
|
|
ret = emulate_std(regs, R2(regs->iir),1);
|
|
break;
|
|
case OPCODE_LDD_L:
|
|
ret = emulate_ldd(regs, R2(regs->iir),0);
|
|
break;
|
|
case OPCODE_STD_L:
|
|
ret = emulate_std(regs, R2(regs->iir),0);
|
|
break;
|
|
}
|
|
#endif
|
|
switch (regs->iir & OPCODE3_MASK)
|
|
{
|
|
case OPCODE_FLDW_L:
|
|
flop=1;
|
|
ret = emulate_ldw(regs, R2(regs->iir),0);
|
|
break;
|
|
case OPCODE_LDW_M:
|
|
ret = emulate_ldw(regs, R2(regs->iir),1);
|
|
break;
|
|
|
|
case OPCODE_FSTW_L:
|
|
flop=1;
|
|
ret = emulate_stw(regs, R2(regs->iir),1);
|
|
break;
|
|
case OPCODE_STW_M:
|
|
ret = emulate_stw(regs, R2(regs->iir),0);
|
|
break;
|
|
}
|
|
switch (regs->iir & OPCODE4_MASK)
|
|
{
|
|
case OPCODE_LDH_L:
|
|
ret = emulate_ldh(regs, R2(regs->iir));
|
|
break;
|
|
case OPCODE_LDW_L:
|
|
case OPCODE_LDWM:
|
|
ret = emulate_ldw(regs, R2(regs->iir),0);
|
|
break;
|
|
case OPCODE_STH_L:
|
|
ret = emulate_sth(regs, R2(regs->iir));
|
|
break;
|
|
case OPCODE_STW_L:
|
|
case OPCODE_STWM:
|
|
ret = emulate_stw(regs, R2(regs->iir),0);
|
|
break;
|
|
}
|
|
|
|
if (ret == 0 && modify && R1(regs->iir))
|
|
regs->gr[R1(regs->iir)] = newbase;
|
|
|
|
|
|
if (ret == ERR_NOTHANDLED)
|
|
printk(KERN_CRIT "Not-handled unaligned insn 0x%08lx\n", regs->iir);
|
|
|
|
DPRINTF("ret = %d\n", ret);
|
|
|
|
if (ret)
|
|
{
|
|
/*
|
|
* The unaligned handler failed.
|
|
* If we were called by __get_user() or __put_user() jump
|
|
* to it's exception fixup handler instead of crashing.
|
|
*/
|
|
if (!user_mode(regs) && fixup_exception(regs))
|
|
return;
|
|
|
|
printk(KERN_CRIT "Unaligned handler failed, ret = %d\n", ret);
|
|
die_if_kernel("Unaligned data reference", regs, 28);
|
|
|
|
if (ret == ERR_PAGEFAULT)
|
|
{
|
|
si.si_signo = SIGSEGV;
|
|
si.si_errno = 0;
|
|
si.si_code = SEGV_MAPERR;
|
|
si.si_addr = (void __user *)regs->ior;
|
|
force_sig_info(SIGSEGV, &si, current);
|
|
}
|
|
else
|
|
{
|
|
force_sigbus:
|
|
/* couldn't handle it ... */
|
|
si.si_signo = SIGBUS;
|
|
si.si_errno = 0;
|
|
si.si_code = BUS_ADRALN;
|
|
si.si_addr = (void __user *)regs->ior;
|
|
force_sig_info(SIGBUS, &si, current);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* else we handled it, let life go on. */
|
|
regs->gr[0]|=PSW_N;
|
|
}
|
|
|
|
/*
|
|
* NB: check_unaligned() is only used for PCXS processors right
|
|
* now, so we only check for PA1.1 encodings at this point.
|
|
*/
|
|
|
|
int
|
|
check_unaligned(struct pt_regs *regs)
|
|
{
|
|
unsigned long align_mask;
|
|
|
|
/* Get alignment mask */
|
|
|
|
align_mask = 0UL;
|
|
switch (regs->iir & OPCODE1_MASK) {
|
|
|
|
case OPCODE_LDH_I:
|
|
case OPCODE_LDH_S:
|
|
case OPCODE_STH:
|
|
align_mask = 1UL;
|
|
break;
|
|
|
|
case OPCODE_LDW_I:
|
|
case OPCODE_LDWA_I:
|
|
case OPCODE_LDW_S:
|
|
case OPCODE_LDWA_S:
|
|
case OPCODE_STW:
|
|
case OPCODE_STWA:
|
|
align_mask = 3UL;
|
|
break;
|
|
|
|
default:
|
|
switch (regs->iir & OPCODE4_MASK) {
|
|
case OPCODE_LDH_L:
|
|
case OPCODE_STH_L:
|
|
align_mask = 1UL;
|
|
break;
|
|
case OPCODE_LDW_L:
|
|
case OPCODE_LDWM:
|
|
case OPCODE_STW_L:
|
|
case OPCODE_STWM:
|
|
align_mask = 3UL;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return (int)(regs->ior & align_mask);
|
|
}
|
|
|