| /* |
| * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| struct pt_regs; |
| |
| /* |
| * We don't allow single-stepping an mtmsrd that would clear |
| * MSR_RI, since that would make the exception unrecoverable. |
| * Since we need to single-step to proceed from a breakpoint, |
| * we don't allow putting a breakpoint on an mtmsrd instruction. |
| * Similarly we don't allow breakpoints on rfid instructions. |
| * These macros tell us if an instruction is a mtmsrd or rfid. |
| * Note that IS_MTMSRD returns true for both an mtmsr (32-bit) |
| * and an mtmsrd (64-bit). |
| */ |
| #define IS_MTMSRD(instr) (((instr) & 0xfc0007be) == 0x7c000124) |
| #define IS_RFID(instr) (((instr) & 0xfc0007fe) == 0x4c000024) |
| #define IS_RFI(instr) (((instr) & 0xfc0007fe) == 0x4c000064) |
| |
| /* Emulate instructions that cause a transfer of control. */ |
| extern int emulate_step(struct pt_regs *regs, unsigned int instr); |
