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/arch/powerpc/include/asm/sstep.h

https://github.com/aicjofs/android_kernel_lge_v500_20d_f2fs
C Header | 27 lines | 5 code | 3 blank | 19 comment | 3 complexity | a4f8ac5d8c41d40e7f757350dbf5fc45 MD5 | raw file
 1/*
 2 * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9
10struct pt_regs;
11
12/*
13 * We don't allow single-stepping an mtmsrd that would clear
14 * MSR_RI, since that would make the exception unrecoverable.
15 * Since we need to single-step to proceed from a breakpoint,
16 * we don't allow putting a breakpoint on an mtmsrd instruction.
17 * Similarly we don't allow breakpoints on rfid instructions.
18 * These macros tell us if an instruction is a mtmsrd or rfid.
19 * Note that IS_MTMSRD returns true for both an mtmsr (32-bit)
20 * and an mtmsrd (64-bit).
21 */
22#define IS_MTMSRD(instr)	(((instr) & 0xfc0007be) == 0x7c000124)
23#define IS_RFID(instr)		(((instr) & 0xfc0007fe) == 0x4c000024)
24#define IS_RFI(instr)		(((instr) & 0xfc0007fe) == 0x4c000064)
25
26/* Emulate instructions that cause a transfer of control. */
27extern int emulate_step(struct pt_regs *regs, unsigned int instr);