2 * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
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.
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.
20 #define IS_MTMSRD(instr) (((instr) & 0xfc0007fe) == 0x7c000164)
21 #define IS_RFID(instr) (((instr) & 0xfc0007fe) == 0x4c000024)
23 /* Emulate instructions that cause a transfer of control. */
24 extern int emulate_step(struct pt_regs *regs, unsigned int instr);