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60063497a9
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
967 lines
29 KiB
C
967 lines
29 KiB
C
/* MN10300 Misalignment fixup handler
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <linux/atomic.h>
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#include <asm/smp.h>
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#include <asm/pgalloc.h>
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#include <asm/cpu-regs.h>
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#include <asm/busctl-regs.h>
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#include <asm/fpu.h>
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#include <asm/gdb-stub.h>
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#include <asm/asm-offsets.h>
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#if 0
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#define kdebug(FMT, ...) printk(KERN_DEBUG "MISALIGN: "FMT"\n", ##__VA_ARGS__)
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#else
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#define kdebug(FMT, ...) do {} while (0)
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#endif
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static int misalignment_addr(unsigned long *registers, unsigned long sp,
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unsigned params, unsigned opcode,
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unsigned long disp,
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void **_address, unsigned long **_postinc,
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unsigned long *_inc);
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static int misalignment_reg(unsigned long *registers, unsigned params,
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unsigned opcode, unsigned long disp,
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unsigned long **_register);
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static void misalignment_MOV_Lcc(struct pt_regs *regs, uint32_t opcode);
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static const unsigned Dreg_index[] = {
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REG_D0 >> 2, REG_D1 >> 2, REG_D2 >> 2, REG_D3 >> 2
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};
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static const unsigned Areg_index[] = {
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REG_A0 >> 2, REG_A1 >> 2, REG_A2 >> 2, REG_A3 >> 2
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};
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static const unsigned Rreg_index[] = {
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REG_E0 >> 2, REG_E1 >> 2, REG_E2 >> 2, REG_E3 >> 2,
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REG_E4 >> 2, REG_E5 >> 2, REG_E6 >> 2, REG_E7 >> 2,
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REG_A0 >> 2, REG_A1 >> 2, REG_A2 >> 2, REG_A3 >> 2,
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REG_D0 >> 2, REG_D1 >> 2, REG_D2 >> 2, REG_D3 >> 2
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};
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enum format_id {
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FMT_S0,
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FMT_S1,
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FMT_S2,
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FMT_S4,
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FMT_D0,
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FMT_D1,
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FMT_D2,
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FMT_D4,
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FMT_D6,
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FMT_D7,
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FMT_D8,
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FMT_D9,
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FMT_D10,
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};
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static const struct {
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u_int8_t opsz, dispsz;
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} format_tbl[16] = {
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[FMT_S0] = { 8, 0 },
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[FMT_S1] = { 8, 8 },
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[FMT_S2] = { 8, 16 },
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[FMT_S4] = { 8, 32 },
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[FMT_D0] = { 16, 0 },
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[FMT_D1] = { 16, 8 },
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[FMT_D2] = { 16, 16 },
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[FMT_D4] = { 16, 32 },
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[FMT_D6] = { 24, 0 },
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[FMT_D7] = { 24, 8 },
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[FMT_D8] = { 24, 24 },
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[FMT_D9] = { 24, 32 },
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[FMT_D10] = { 32, 0 },
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};
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enum value_id {
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DM0, /* data reg in opcode in bits 0-1 */
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DM1, /* data reg in opcode in bits 2-3 */
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DM2, /* data reg in opcode in bits 4-5 */
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AM0, /* addr reg in opcode in bits 0-1 */
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AM1, /* addr reg in opcode in bits 2-3 */
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AM2, /* addr reg in opcode in bits 4-5 */
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RM0, /* reg in opcode in bits 0-3 */
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RM1, /* reg in opcode in bits 2-5 */
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RM2, /* reg in opcode in bits 4-7 */
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RM4, /* reg in opcode in bits 8-11 */
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RM6, /* reg in opcode in bits 12-15 */
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RD0, /* reg in displacement in bits 0-3 */
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RD2, /* reg in displacement in bits 4-7 */
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SP, /* stack pointer */
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SD8, /* 8-bit signed displacement */
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SD16, /* 16-bit signed displacement */
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SD24, /* 24-bit signed displacement */
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SIMM4_2, /* 4-bit signed displacement in opcode bits 4-7 */
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SIMM8, /* 8-bit signed immediate */
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IMM8, /* 8-bit unsigned immediate */
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IMM16, /* 16-bit unsigned immediate */
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IMM24, /* 24-bit unsigned immediate */
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IMM32, /* 32-bit unsigned immediate */
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IMM32_HIGH8, /* 32-bit unsigned immediate, LSB in opcode */
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IMM32_MEM, /* 32-bit unsigned displacement */
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IMM32_HIGH8_MEM, /* 32-bit unsigned displacement, LSB in opcode */
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DN0 = DM0,
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DN1 = DM1,
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DN2 = DM2,
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AN0 = AM0,
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AN1 = AM1,
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AN2 = AM2,
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RN0 = RM0,
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RN1 = RM1,
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RN2 = RM2,
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RN4 = RM4,
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RN6 = RM6,
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DI = DM1,
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RI = RM2,
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};
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struct mn10300_opcode {
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const char name[8];
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u_int32_t opcode;
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u_int32_t opmask;
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unsigned exclusion;
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enum format_id format;
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unsigned cpu_mask;
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#define AM33 330
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unsigned params[2];
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#define MEM(ADDR) (0x80000000 | (ADDR))
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#define MEM2(ADDR1, ADDR2) (0x80000000 | (ADDR1) << 8 | (ADDR2))
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#define MEMINC(ADDR) (0x81000000 | (ADDR))
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#define MEMINC2(ADDR, INC) (0x81000000 | (ADDR) << 8 | (INC))
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};
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/* LIBOPCODES EXCERPT
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Assemble Matsushita MN10300 instructions.
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Copyright 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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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 Licence as published by
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the Free Software Foundation; either version 2 of the Licence, or
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(at your option) any later version.
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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 Licence for more details.
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You should have received a copy of the GNU General Public Licence
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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static const struct mn10300_opcode mn10300_opcodes[] = {
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{ "mov", 0x4200, 0xf300, 0, FMT_S1, 0, {DM1, MEM2(IMM8, SP)}},
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{ "mov", 0x4300, 0xf300, 0, FMT_S1, 0, {AM1, MEM2(IMM8, SP)}},
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{ "mov", 0x5800, 0xfc00, 0, FMT_S1, 0, {MEM2(IMM8, SP), DN0}},
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{ "mov", 0x5c00, 0xfc00, 0, FMT_S1, 0, {MEM2(IMM8, SP), AN0}},
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{ "mov", 0x60, 0xf0, 0, FMT_S0, 0, {DM1, MEM(AN0)}},
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{ "mov", 0x70, 0xf0, 0, FMT_S0, 0, {MEM(AM0), DN1}},
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{ "mov", 0xf000, 0xfff0, 0, FMT_D0, 0, {MEM(AM0), AN1}},
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{ "mov", 0xf010, 0xfff0, 0, FMT_D0, 0, {AM1, MEM(AN0)}},
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{ "mov", 0xf300, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), DN2}},
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{ "mov", 0xf340, 0xffc0, 0, FMT_D0, 0, {DM2, MEM2(DI, AN0)}},
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{ "mov", 0xf380, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), AN2}},
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{ "mov", 0xf3c0, 0xffc0, 0, FMT_D0, 0, {AM2, MEM2(DI, AN0)}},
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{ "mov", 0xf80000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8, AM0), DN1}},
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{ "mov", 0xf81000, 0xfff000, 0, FMT_D1, 0, {DM1, MEM2(SD8, AN0)}},
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{ "mov", 0xf82000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8,AM0), AN1}},
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{ "mov", 0xf83000, 0xfff000, 0, FMT_D1, 0, {AM1, MEM2(SD8, AN0)}},
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{ "mov", 0xf90a00, 0xffff00, 0, FMT_D6, AM33, {MEM(RM0), RN2}},
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{ "mov", 0xf91a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEM(RN0)}},
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{ "mov", 0xf96a00, 0xffff00, 0x12, FMT_D6, AM33, {MEMINC(RM0), RN2}},
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{ "mov", 0xf97a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEMINC(RN0)}},
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{ "mov", 0xfa000000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), DN1}},
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{ "mov", 0xfa100000, 0xfff00000, 0, FMT_D2, 0, {DM1, MEM2(SD16, AN0)}},
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{ "mov", 0xfa200000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), AN1}},
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{ "mov", 0xfa300000, 0xfff00000, 0, FMT_D2, 0, {AM1, MEM2(SD16, AN0)}},
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{ "mov", 0xfa900000, 0xfff30000, 0, FMT_D2, 0, {AM1, MEM2(IMM16, SP)}},
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{ "mov", 0xfa910000, 0xfff30000, 0, FMT_D2, 0, {DM1, MEM2(IMM16, SP)}},
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{ "mov", 0xfab00000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), AN0}},
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{ "mov", 0xfab40000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), DN0}},
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{ "mov", 0xfb0a0000, 0xffff0000, 0, FMT_D7, AM33, {MEM2(SD8, RM0), RN2}},
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{ "mov", 0xfb1a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEM2(SD8, RN0)}},
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{ "mov", 0xfb6a0000, 0xffff0000, 0x22, FMT_D7, AM33, {MEMINC2 (RM0, SIMM8), RN2}},
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{ "mov", 0xfb7a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEMINC2 (RN0, SIMM8)}},
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{ "mov", 0xfb8a0000, 0xffff0f00, 0, FMT_D7, AM33, {MEM2(IMM8, SP), RN2}},
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{ "mov", 0xfb8e0000, 0xffff000f, 0, FMT_D7, AM33, {MEM2(RI, RM0), RD2}},
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{ "mov", 0xfb9a0000, 0xffff0f00, 0, FMT_D7, AM33, {RM2, MEM2(IMM8, SP)}},
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{ "mov", 0xfb9e0000, 0xffff000f, 0, FMT_D7, AM33, {RD2, MEM2(RI, RN0)}},
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{ "mov", 0xfc000000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), DN1}},
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{ "mov", 0xfc100000, 0xfff00000, 0, FMT_D4, 0, {DM1, MEM2(IMM32,AN0)}},
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{ "mov", 0xfc200000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), AN1}},
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{ "mov", 0xfc300000, 0xfff00000, 0, FMT_D4, 0, {AM1, MEM2(IMM32,AN0)}},
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{ "mov", 0xfc800000, 0xfff30000, 0, FMT_D4, 0, {AM1, MEM(IMM32_MEM)}},
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{ "mov", 0xfc810000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM(IMM32_MEM)}},
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{ "mov", 0xfc900000, 0xfff30000, 0, FMT_D4, 0, {AM1, MEM2(IMM32, SP)}},
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{ "mov", 0xfc910000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM2(IMM32, SP)}},
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{ "mov", 0xfca00000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), AN0}},
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{ "mov", 0xfca40000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), DN0}},
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{ "mov", 0xfcb00000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), AN0}},
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{ "mov", 0xfcb40000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), DN0}},
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{ "mov", 0xfd0a0000, 0xffff0000, 0, FMT_D8, AM33, {MEM2(SD24, RM0), RN2}},
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{ "mov", 0xfd1a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEM2(SD24, RN0)}},
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{ "mov", 0xfd6a0000, 0xffff0000, 0x22, FMT_D8, AM33, {MEMINC2 (RM0, IMM24), RN2}},
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{ "mov", 0xfd7a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEMINC2 (RN0, IMM24)}},
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{ "mov", 0xfd8a0000, 0xffff0f00, 0, FMT_D8, AM33, {MEM2(IMM24, SP), RN2}},
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{ "mov", 0xfd9a0000, 0xffff0f00, 0, FMT_D8, AM33, {RM2, MEM2(IMM24, SP)}},
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{ "mov", 0xfe0a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}},
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{ "mov", 0xfe0a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}},
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{ "mov", 0xfe0e0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM(IMM32_HIGH8_MEM), RN2}},
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{ "mov", 0xfe1a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}},
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{ "mov", 0xfe1a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}},
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{ "mov", 0xfe1e0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM(IMM32_HIGH8_MEM)}},
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{ "mov", 0xfe6a0000, 0xffff0000, 0x22, FMT_D9, AM33, {MEMINC2 (RM0, IMM32_HIGH8), RN2}},
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{ "mov", 0xfe7a0000, 0xffff0000, 0, FMT_D9, AM33, {RN2, MEMINC2 (RM0, IMM32_HIGH8)}},
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{ "mov", 0xfe8a0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8, SP), RN2}},
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{ "mov", 0xfe9a0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, SP)}},
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{ "movhu", 0xf060, 0xfff0, 0, FMT_D0, 0, {MEM(AM0), DN1}},
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{ "movhu", 0xf070, 0xfff0, 0, FMT_D0, 0, {DM1, MEM(AN0)}},
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{ "movhu", 0xf480, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), DN2}},
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{ "movhu", 0xf4c0, 0xffc0, 0, FMT_D0, 0, {DM2, MEM2(DI, AN0)}},
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{ "movhu", 0xf86000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8, AM0), DN1}},
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{ "movhu", 0xf87000, 0xfff000, 0, FMT_D1, 0, {DM1, MEM2(SD8, AN0)}},
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{ "movhu", 0xf89300, 0xfff300, 0, FMT_D1, 0, {DM1, MEM2(IMM8, SP)}},
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{ "movhu", 0xf8bc00, 0xfffc00, 0, FMT_D1, 0, {MEM2(IMM8, SP), DN0}},
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{ "movhu", 0xf94a00, 0xffff00, 0, FMT_D6, AM33, {MEM(RM0), RN2}},
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{ "movhu", 0xf95a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEM(RN0)}},
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{ "movhu", 0xf9ea00, 0xffff00, 0x12, FMT_D6, AM33, {MEMINC(RM0), RN2}},
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{ "movhu", 0xf9fa00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEMINC(RN0)}},
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{ "movhu", 0xfa600000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), DN1}},
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{ "movhu", 0xfa700000, 0xfff00000, 0, FMT_D2, 0, {DM1, MEM2(SD16, AN0)}},
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{ "movhu", 0xfa930000, 0xfff30000, 0, FMT_D2, 0, {DM1, MEM2(IMM16, SP)}},
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{ "movhu", 0xfabc0000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), DN0}},
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{ "movhu", 0xfb4a0000, 0xffff0000, 0, FMT_D7, AM33, {MEM2(SD8, RM0), RN2}},
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{ "movhu", 0xfb5a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEM2(SD8, RN0)}},
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{ "movhu", 0xfbca0000, 0xffff0f00, 0, FMT_D7, AM33, {MEM2(IMM8, SP), RN2}},
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{ "movhu", 0xfbce0000, 0xffff000f, 0, FMT_D7, AM33, {MEM2(RI, RM0), RD2}},
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{ "movhu", 0xfbda0000, 0xffff0f00, 0, FMT_D7, AM33, {RM2, MEM2(IMM8, SP)}},
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{ "movhu", 0xfbde0000, 0xffff000f, 0, FMT_D7, AM33, {RD2, MEM2(RI, RN0)}},
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{ "movhu", 0xfbea0000, 0xffff0000, 0x22, FMT_D7, AM33, {MEMINC2 (RM0, SIMM8), RN2}},
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{ "movhu", 0xfbfa0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEMINC2 (RN0, SIMM8)}},
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{ "movhu", 0xfc600000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), DN1}},
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{ "movhu", 0xfc700000, 0xfff00000, 0, FMT_D4, 0, {DM1, MEM2(IMM32,AN0)}},
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{ "movhu", 0xfc830000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM(IMM32_MEM)}},
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{ "movhu", 0xfc930000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM2(IMM32, SP)}},
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{ "movhu", 0xfcac0000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), DN0}},
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{ "movhu", 0xfcbc0000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), DN0}},
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{ "movhu", 0xfd4a0000, 0xffff0000, 0, FMT_D8, AM33, {MEM2(SD24, RM0), RN2}},
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{ "movhu", 0xfd5a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEM2(SD24, RN0)}},
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{ "movhu", 0xfdca0000, 0xffff0f00, 0, FMT_D8, AM33, {MEM2(IMM24, SP), RN2}},
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{ "movhu", 0xfdda0000, 0xffff0f00, 0, FMT_D8, AM33, {RM2, MEM2(IMM24, SP)}},
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{ "movhu", 0xfdea0000, 0xffff0000, 0x22, FMT_D8, AM33, {MEMINC2 (RM0, IMM24), RN2}},
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{ "movhu", 0xfdfa0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEMINC2 (RN0, IMM24)}},
|
|
{ "movhu", 0xfe4a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}},
|
|
{ "movhu", 0xfe4e0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM(IMM32_HIGH8_MEM), RN2}},
|
|
{ "movhu", 0xfe5a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}},
|
|
{ "movhu", 0xfe5e0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM(IMM32_HIGH8_MEM)}},
|
|
{ "movhu", 0xfeca0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8, SP), RN2}},
|
|
{ "movhu", 0xfeda0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, SP)}},
|
|
{ "movhu", 0xfeea0000, 0xffff0000, 0x22, FMT_D9, AM33, {MEMINC2 (RM0, IMM32_HIGH8), RN2}},
|
|
{ "movhu", 0xfefa0000, 0xffff0000, 0, FMT_D9, AM33, {RN2, MEMINC2 (RM0, IMM32_HIGH8)}},
|
|
|
|
{ "mov_llt", 0xf7e00000, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lgt", 0xf7e00001, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lge", 0xf7e00002, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lle", 0xf7e00003, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lcs", 0xf7e00004, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lhi", 0xf7e00005, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lcc", 0xf7e00006, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lls", 0xf7e00007, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_leq", 0xf7e00008, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lne", 0xf7e00009, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
{ "mov_lra", 0xf7e0000a, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}},
|
|
|
|
{ "", 0, 0, 0, 0, 0, {0}},
|
|
};
|
|
|
|
/*
|
|
* fix up misalignment problems where possible
|
|
*/
|
|
asmlinkage void misalignment(struct pt_regs *regs, enum exception_code code)
|
|
{
|
|
const struct exception_table_entry *fixup;
|
|
const struct mn10300_opcode *pop;
|
|
unsigned long *registers = (unsigned long *) regs;
|
|
unsigned long data, *store, *postinc, disp, inc, sp;
|
|
mm_segment_t seg;
|
|
siginfo_t info;
|
|
uint32_t opcode, noc, xo, xm;
|
|
uint8_t *pc, byte, datasz;
|
|
void *address;
|
|
unsigned tmp, npop, dispsz, loop;
|
|
|
|
/* we don't fix up userspace misalignment faults */
|
|
if (user_mode(regs))
|
|
goto bus_error;
|
|
|
|
sp = (unsigned long) regs + sizeof(*regs);
|
|
|
|
kdebug("==>misalignment({pc=%lx,sp=%lx})", regs->pc, sp);
|
|
|
|
if (regs->epsw & EPSW_IE)
|
|
asm volatile("or %0,epsw" : : "i"(EPSW_IE));
|
|
|
|
seg = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
|
|
fixup = search_exception_tables(regs->pc);
|
|
|
|
/* first thing to do is to match the opcode */
|
|
pc = (u_int8_t *) regs->pc;
|
|
|
|
if (__get_user(byte, pc) != 0)
|
|
goto fetch_error;
|
|
opcode = byte;
|
|
noc = 8;
|
|
|
|
for (pop = mn10300_opcodes; pop->name[0]; pop++) {
|
|
npop = ilog2(pop->opcode | pop->opmask);
|
|
if (npop <= 0 || npop > 31)
|
|
continue;
|
|
npop = (npop + 8) & ~7;
|
|
|
|
got_more_bits:
|
|
if (npop == noc) {
|
|
if ((opcode & pop->opmask) == pop->opcode)
|
|
goto found_opcode;
|
|
} else if (npop > noc) {
|
|
xo = pop->opcode >> (npop - noc);
|
|
xm = pop->opmask >> (npop - noc);
|
|
|
|
if ((opcode & xm) != xo)
|
|
continue;
|
|
|
|
/* we've got a partial match (an exact match on the
|
|
* first N bytes), so we need to get some more data */
|
|
pc++;
|
|
if (__get_user(byte, pc) != 0)
|
|
goto fetch_error;
|
|
opcode = opcode << 8 | byte;
|
|
noc += 8;
|
|
goto got_more_bits;
|
|
} else {
|
|
/* there's already been a partial match as long as the
|
|
* complete match we're now considering, so this one
|
|
* should't match */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* didn't manage to find a fixup */
|
|
printk(KERN_CRIT "MISALIGN: %lx: unsupported instruction %x\n",
|
|
regs->pc, opcode);
|
|
|
|
failed:
|
|
set_fs(seg);
|
|
if (die_if_no_fixup("misalignment error", regs, code))
|
|
return;
|
|
|
|
bus_error:
|
|
info.si_signo = SIGBUS;
|
|
info.si_errno = 0;
|
|
info.si_code = BUS_ADRALN;
|
|
info.si_addr = (void *) regs->pc;
|
|
force_sig_info(SIGBUS, &info, current);
|
|
return;
|
|
|
|
/* error reading opcodes */
|
|
fetch_error:
|
|
printk(KERN_CRIT
|
|
"MISALIGN: %p: fault whilst reading instruction data\n",
|
|
pc);
|
|
goto failed;
|
|
|
|
bad_addr_mode:
|
|
printk(KERN_CRIT
|
|
"MISALIGN: %lx: unsupported addressing mode %x\n",
|
|
regs->pc, opcode);
|
|
goto failed;
|
|
|
|
bad_reg_mode:
|
|
printk(KERN_CRIT
|
|
"MISALIGN: %lx: unsupported register mode %x\n",
|
|
regs->pc, opcode);
|
|
goto failed;
|
|
|
|
unsupported_instruction:
|
|
printk(KERN_CRIT
|
|
"MISALIGN: %lx: unsupported instruction %x (%s)\n",
|
|
regs->pc, opcode, pop->name);
|
|
goto failed;
|
|
|
|
transfer_failed:
|
|
set_fs(seg);
|
|
if (fixup) {
|
|
regs->pc = fixup->fixup;
|
|
return;
|
|
}
|
|
if (die_if_no_fixup("misalignment fixup", regs, code))
|
|
return;
|
|
|
|
info.si_signo = SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = 0;
|
|
info.si_addr = (void *) regs->pc;
|
|
force_sig_info(SIGSEGV, &info, current);
|
|
return;
|
|
|
|
/* we matched the opcode */
|
|
found_opcode:
|
|
kdebug("%lx: %x==%x { %x, %x }",
|
|
regs->pc, opcode, pop->opcode, pop->params[0], pop->params[1]);
|
|
|
|
tmp = format_tbl[pop->format].opsz;
|
|
BUG_ON(tmp > noc); /* match was less complete than it ought to have been */
|
|
|
|
if (tmp < noc) {
|
|
tmp = noc - tmp;
|
|
opcode >>= tmp;
|
|
pc -= tmp >> 3;
|
|
}
|
|
|
|
/* grab the extra displacement (note it's LSB first) */
|
|
disp = 0;
|
|
dispsz = format_tbl[pop->format].dispsz;
|
|
for (loop = 0; loop < dispsz; loop += 8) {
|
|
pc++;
|
|
if (__get_user(byte, pc) != 0)
|
|
goto fetch_error;
|
|
disp |= byte << loop;
|
|
kdebug("{%p} disp[%02x]=%02x", pc, loop, byte);
|
|
}
|
|
|
|
kdebug("disp=%lx", disp);
|
|
|
|
set_fs(KERNEL_XDS);
|
|
if (fixup)
|
|
set_fs(seg);
|
|
|
|
tmp = (pop->params[0] ^ pop->params[1]) & 0x80000000;
|
|
if (!tmp) {
|
|
printk(KERN_CRIT
|
|
"MISALIGN: %lx: insn not move to/from memory %x\n",
|
|
regs->pc, opcode);
|
|
goto failed;
|
|
}
|
|
|
|
/* determine the data transfer size of the move */
|
|
if (pop->name[3] == 0 || /* "mov" */
|
|
pop->name[4] == 'l') /* mov_lcc */
|
|
inc = datasz = 4;
|
|
else if (pop->name[3] == 'h') /* movhu */
|
|
inc = datasz = 2;
|
|
else
|
|
goto unsupported_instruction;
|
|
|
|
if (pop->params[0] & 0x80000000) {
|
|
/* move memory to register */
|
|
if (!misalignment_addr(registers, sp,
|
|
pop->params[0], opcode, disp,
|
|
&address, &postinc, &inc))
|
|
goto bad_addr_mode;
|
|
|
|
if (!misalignment_reg(registers, pop->params[1], opcode, disp,
|
|
&store))
|
|
goto bad_reg_mode;
|
|
|
|
kdebug("mov%u (%p),DARn", datasz, address);
|
|
if (copy_from_user(&data, (void *) address, datasz) != 0)
|
|
goto transfer_failed;
|
|
if (pop->params[0] & 0x1000000) {
|
|
kdebug("inc=%lx", inc);
|
|
*postinc += inc;
|
|
}
|
|
|
|
*store = data;
|
|
kdebug("loaded %lx", data);
|
|
} else {
|
|
/* move register to memory */
|
|
if (!misalignment_reg(registers, pop->params[0], opcode, disp,
|
|
&store))
|
|
goto bad_reg_mode;
|
|
|
|
if (!misalignment_addr(registers, sp,
|
|
pop->params[1], opcode, disp,
|
|
&address, &postinc, &inc))
|
|
goto bad_addr_mode;
|
|
|
|
data = *store;
|
|
|
|
kdebug("mov%u %lx,(%p)", datasz, data, address);
|
|
if (copy_to_user((void *) address, &data, datasz) != 0)
|
|
goto transfer_failed;
|
|
if (pop->params[1] & 0x1000000)
|
|
*postinc += inc;
|
|
}
|
|
|
|
tmp = format_tbl[pop->format].opsz + format_tbl[pop->format].dispsz;
|
|
regs->pc += tmp >> 3;
|
|
|
|
/* handle MOV_Lcc, which are currently the only FMT_D10 insns that
|
|
* access memory */
|
|
if (pop->format == FMT_D10)
|
|
misalignment_MOV_Lcc(regs, opcode);
|
|
|
|
set_fs(seg);
|
|
}
|
|
|
|
/*
|
|
* determine the address that was being accessed
|
|
*/
|
|
static int misalignment_addr(unsigned long *registers, unsigned long sp,
|
|
unsigned params, unsigned opcode,
|
|
unsigned long disp,
|
|
void **_address, unsigned long **_postinc,
|
|
unsigned long *_inc)
|
|
{
|
|
unsigned long *postinc = NULL, address = 0, tmp;
|
|
|
|
if (!(params & 0x1000000)) {
|
|
kdebug("noinc");
|
|
*_inc = 0;
|
|
_inc = NULL;
|
|
}
|
|
|
|
params &= 0x00ffffff;
|
|
|
|
do {
|
|
switch (params & 0xff) {
|
|
case DM0:
|
|
postinc = ®isters[Dreg_index[opcode & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case DM1:
|
|
postinc = ®isters[Dreg_index[opcode >> 2 & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case DM2:
|
|
postinc = ®isters[Dreg_index[opcode >> 4 & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case AM0:
|
|
postinc = ®isters[Areg_index[opcode & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case AM1:
|
|
postinc = ®isters[Areg_index[opcode >> 2 & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case AM2:
|
|
postinc = ®isters[Areg_index[opcode >> 4 & 0x03]];
|
|
address += *postinc;
|
|
break;
|
|
case RM0:
|
|
postinc = ®isters[Rreg_index[opcode & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RM1:
|
|
postinc = ®isters[Rreg_index[opcode >> 2 & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RM2:
|
|
postinc = ®isters[Rreg_index[opcode >> 4 & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RM4:
|
|
postinc = ®isters[Rreg_index[opcode >> 8 & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RM6:
|
|
postinc = ®isters[Rreg_index[opcode >> 12 & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RD0:
|
|
postinc = ®isters[Rreg_index[disp & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case RD2:
|
|
postinc = ®isters[Rreg_index[disp >> 4 & 0x0f]];
|
|
address += *postinc;
|
|
break;
|
|
case SP:
|
|
address += sp;
|
|
break;
|
|
|
|
/* displacements are either to be added to the address
|
|
* before use, or, in the case of post-inc addressing,
|
|
* to be added into the base register after use */
|
|
case SD8:
|
|
case SIMM8:
|
|
disp = (long) (int8_t) (disp & 0xff);
|
|
goto displace_or_inc;
|
|
case SD16:
|
|
disp = (long) (int16_t) (disp & 0xffff);
|
|
goto displace_or_inc;
|
|
case SD24:
|
|
tmp = disp << 8;
|
|
asm("asr 8,%0" : "=r"(tmp) : "0"(tmp) : "cc");
|
|
disp = (long) tmp;
|
|
goto displace_or_inc;
|
|
case SIMM4_2:
|
|
tmp = opcode >> 4 & 0x0f;
|
|
tmp <<= 28;
|
|
asm("asr 28,%0" : "=r"(tmp) : "0"(tmp) : "cc");
|
|
disp = (long) tmp;
|
|
goto displace_or_inc;
|
|
case IMM8:
|
|
disp &= 0x000000ff;
|
|
goto displace_or_inc;
|
|
case IMM16:
|
|
disp &= 0x0000ffff;
|
|
goto displace_or_inc;
|
|
case IMM24:
|
|
disp &= 0x00ffffff;
|
|
goto displace_or_inc;
|
|
case IMM32:
|
|
case IMM32_MEM:
|
|
case IMM32_HIGH8:
|
|
case IMM32_HIGH8_MEM:
|
|
displace_or_inc:
|
|
kdebug("%s %lx", _inc ? "incr" : "disp", disp);
|
|
if (!_inc)
|
|
address += disp;
|
|
else
|
|
*_inc = disp;
|
|
break;
|
|
default:
|
|
BUG();
|
|
return 0;
|
|
}
|
|
} while ((params >>= 8));
|
|
|
|
*_address = (void *) address;
|
|
*_postinc = postinc;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* determine the register that is acting as source/dest
|
|
*/
|
|
static int misalignment_reg(unsigned long *registers, unsigned params,
|
|
unsigned opcode, unsigned long disp,
|
|
unsigned long **_register)
|
|
{
|
|
params &= 0x7fffffff;
|
|
|
|
if (params & 0xffffff00)
|
|
return 0;
|
|
|
|
switch (params & 0xff) {
|
|
case DM0:
|
|
*_register = ®isters[Dreg_index[opcode & 0x03]];
|
|
break;
|
|
case DM1:
|
|
*_register = ®isters[Dreg_index[opcode >> 2 & 0x03]];
|
|
break;
|
|
case DM2:
|
|
*_register = ®isters[Dreg_index[opcode >> 4 & 0x03]];
|
|
break;
|
|
case AM0:
|
|
*_register = ®isters[Areg_index[opcode & 0x03]];
|
|
break;
|
|
case AM1:
|
|
*_register = ®isters[Areg_index[opcode >> 2 & 0x03]];
|
|
break;
|
|
case AM2:
|
|
*_register = ®isters[Areg_index[opcode >> 4 & 0x03]];
|
|
break;
|
|
case RM0:
|
|
*_register = ®isters[Rreg_index[opcode & 0x0f]];
|
|
break;
|
|
case RM1:
|
|
*_register = ®isters[Rreg_index[opcode >> 2 & 0x0f]];
|
|
break;
|
|
case RM2:
|
|
*_register = ®isters[Rreg_index[opcode >> 4 & 0x0f]];
|
|
break;
|
|
case RM4:
|
|
*_register = ®isters[Rreg_index[opcode >> 8 & 0x0f]];
|
|
break;
|
|
case RM6:
|
|
*_register = ®isters[Rreg_index[opcode >> 12 & 0x0f]];
|
|
break;
|
|
case RD0:
|
|
*_register = ®isters[Rreg_index[disp & 0x0f]];
|
|
break;
|
|
case RD2:
|
|
*_register = ®isters[Rreg_index[disp >> 4 & 0x0f]];
|
|
break;
|
|
case SP:
|
|
*_register = ®isters[REG_SP >> 2];
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* handle the conditional loop part of the move-and-loop instructions
|
|
*/
|
|
static void misalignment_MOV_Lcc(struct pt_regs *regs, uint32_t opcode)
|
|
{
|
|
unsigned long epsw = regs->epsw;
|
|
unsigned long NxorV;
|
|
|
|
kdebug("MOV_Lcc %x [flags=%lx]", opcode, epsw & 0xf);
|
|
|
|
/* calculate N^V and shift onto the same bit position as Z */
|
|
NxorV = ((epsw >> 3) ^ epsw >> 1) & 1;
|
|
|
|
switch (opcode & 0xf) {
|
|
case 0x0: /* MOV_LLT: N^V */
|
|
if (NxorV)
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x1: /* MOV_LGT: ~(Z or (N^V))*/
|
|
if (!((epsw & EPSW_FLAG_Z) | NxorV))
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x2: /* MOV_LGE: ~(N^V) */
|
|
if (!NxorV)
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x3: /* MOV_LLE: Z or (N^V) */
|
|
if ((epsw & EPSW_FLAG_Z) | NxorV)
|
|
goto take_the_loop;
|
|
return;
|
|
|
|
case 0x4: /* MOV_LCS: C */
|
|
if (epsw & EPSW_FLAG_C)
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x5: /* MOV_LHI: ~(C or Z) */
|
|
if (!(epsw & (EPSW_FLAG_C | EPSW_FLAG_Z)))
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x6: /* MOV_LCC: ~C */
|
|
if (!(epsw & EPSW_FLAG_C))
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x7: /* MOV_LLS: C or Z */
|
|
if (epsw & (EPSW_FLAG_C | EPSW_FLAG_Z))
|
|
goto take_the_loop;
|
|
return;
|
|
|
|
case 0x8: /* MOV_LEQ: Z */
|
|
if (epsw & EPSW_FLAG_Z)
|
|
goto take_the_loop;
|
|
return;
|
|
case 0x9: /* MOV_LNE: ~Z */
|
|
if (!(epsw & EPSW_FLAG_Z))
|
|
goto take_the_loop;
|
|
return;
|
|
case 0xa: /* MOV_LRA: always */
|
|
goto take_the_loop;
|
|
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
take_the_loop:
|
|
/* wind the PC back to just after the SETLB insn */
|
|
kdebug("loop LAR=%lx", regs->lar);
|
|
regs->pc = regs->lar - 4;
|
|
}
|
|
|
|
/*
|
|
* misalignment handler tests
|
|
*/
|
|
#ifdef CONFIG_TEST_MISALIGNMENT_HANDLER
|
|
static u8 __initdata testbuf[512] __attribute__((aligned(16))) = {
|
|
[257] = 0x11,
|
|
[258] = 0x22,
|
|
[259] = 0x33,
|
|
[260] = 0x44,
|
|
};
|
|
|
|
#define ASSERTCMP(X, OP, Y) \
|
|
do { \
|
|
if (unlikely(!((X) OP (Y)))) { \
|
|
printk(KERN_ERR "\n"); \
|
|
printk(KERN_ERR "MISALIGN: Assertion failed at line %u\n", \
|
|
__LINE__); \
|
|
printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
|
|
(unsigned long)(X), (unsigned long)(Y)); \
|
|
BUG(); \
|
|
} \
|
|
} while(0)
|
|
|
|
static int __init test_misalignment(void)
|
|
{
|
|
register void *r asm("e0");
|
|
register u32 y asm("e1");
|
|
void *p = testbuf, *q;
|
|
u32 tmp, tmp2, x;
|
|
|
|
printk(KERN_NOTICE "==>test_misalignment() [testbuf=%p]\n", p);
|
|
p++;
|
|
|
|
printk(KERN_NOTICE "___ MOV (Am),Dn ___\n");
|
|
q = p + 256;
|
|
asm volatile("mov (%0),%1" : "+a"(q), "=d"(x));
|
|
ASSERTCMP(q, ==, p + 256);
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (256,Am),Dn ___\n");
|
|
q = p;
|
|
asm volatile("mov (256,%0),%1" : "+a"(q), "=d"(x));
|
|
ASSERTCMP(q, ==, p);
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (Di,Am),Dn ___\n");
|
|
tmp = 256;
|
|
q = p;
|
|
asm volatile("mov (%2,%0),%1" : "+a"(q), "=d"(x), "+d"(tmp));
|
|
ASSERTCMP(q, ==, p);
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
ASSERTCMP(tmp, ==, 256);
|
|
|
|
printk(KERN_NOTICE "___ MOV (256,Rm),Rn ___\n");
|
|
r = p;
|
|
asm volatile("mov (256,%0),%1" : "+r"(r), "=r"(y));
|
|
ASSERTCMP(r, ==, p);
|
|
ASSERTCMP(y, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (Rm+),Rn ___\n");
|
|
r = p + 256;
|
|
asm volatile("mov (%0+),%1" : "+r"(r), "=r"(y));
|
|
ASSERTCMP(r, ==, p + 256 + 4);
|
|
ASSERTCMP(y, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (Rm+,8),Rn ___\n");
|
|
r = p + 256;
|
|
asm volatile("mov (%0+,8),%1" : "+r"(r), "=r"(y));
|
|
ASSERTCMP(r, ==, p + 256 + 8);
|
|
ASSERTCMP(y, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (7,SP),Rn ___\n");
|
|
asm volatile(
|
|
"add -16,sp \n"
|
|
"mov +0x11,%0 \n"
|
|
"movbu %0,(7,sp) \n"
|
|
"mov +0x22,%0 \n"
|
|
"movbu %0,(8,sp) \n"
|
|
"mov +0x33,%0 \n"
|
|
"movbu %0,(9,sp) \n"
|
|
"mov +0x44,%0 \n"
|
|
"movbu %0,(10,sp) \n"
|
|
"mov (7,sp),%1 \n"
|
|
"add +16,sp \n"
|
|
: "+a"(q), "=d"(x));
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (259,SP),Rn ___\n");
|
|
asm volatile(
|
|
"add -264,sp \n"
|
|
"mov +0x11,%0 \n"
|
|
"movbu %0,(259,sp) \n"
|
|
"mov +0x22,%0 \n"
|
|
"movbu %0,(260,sp) \n"
|
|
"mov +0x33,%0 \n"
|
|
"movbu %0,(261,sp) \n"
|
|
"mov +0x55,%0 \n"
|
|
"movbu %0,(262,sp) \n"
|
|
"mov (259,sp),%1 \n"
|
|
"add +264,sp \n"
|
|
: "+d"(tmp), "=d"(x));
|
|
ASSERTCMP(x, ==, 0x55332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV (260,SP),Rn ___\n");
|
|
asm volatile(
|
|
"add -264,sp \n"
|
|
"mov +0x11,%0 \n"
|
|
"movbu %0,(260,sp) \n"
|
|
"mov +0x22,%0 \n"
|
|
"movbu %0,(261,sp) \n"
|
|
"mov +0x33,%0 \n"
|
|
"movbu %0,(262,sp) \n"
|
|
"mov +0x55,%0 \n"
|
|
"movbu %0,(263,sp) \n"
|
|
"mov (260,sp),%1 \n"
|
|
"add +264,sp \n"
|
|
: "+d"(tmp), "=d"(x));
|
|
ASSERTCMP(x, ==, 0x55332211);
|
|
|
|
|
|
printk(KERN_NOTICE "___ MOV_LNE ___\n");
|
|
tmp = 1;
|
|
tmp2 = 2;
|
|
q = p + 256;
|
|
asm volatile(
|
|
"setlb \n"
|
|
"mov %2,%3 \n"
|
|
"mov %1,%2 \n"
|
|
"cmp +0,%1 \n"
|
|
"mov_lne (%0+,4),%1"
|
|
: "+r"(q), "+d"(tmp), "+d"(tmp2), "=d"(x)
|
|
:
|
|
: "cc");
|
|
ASSERTCMP(q, ==, p + 256 + 12);
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "___ MOV in SETLB ___\n");
|
|
tmp = 1;
|
|
tmp2 = 2;
|
|
q = p + 256;
|
|
asm volatile(
|
|
"setlb \n"
|
|
"mov %1,%3 \n"
|
|
"mov (%0+),%1 \n"
|
|
"cmp +0,%1 \n"
|
|
"lne "
|
|
: "+a"(q), "+d"(tmp), "+d"(tmp2), "=d"(x)
|
|
:
|
|
: "cc");
|
|
|
|
ASSERTCMP(q, ==, p + 256 + 8);
|
|
ASSERTCMP(x, ==, 0x44332211);
|
|
|
|
printk(KERN_NOTICE "<==test_misalignment()\n");
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(test_misalignment);
|
|
|
|
#endif /* CONFIG_TEST_MISALIGNMENT_HANDLER */
|