/* GNU/Linux/PowerPC specific low level interface, for the remote server for   GDB.   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002   Free Software Foundation, Inc.   This file is part of GDB.   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.   This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.   You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 59 Temple Place - Suite 330,   Boston, MA 02111-1307, USA.  */#include "server.h"#include "linux-low.h"#include <asm/ptrace.h>#define ppc_num_regs 71/* Currently, don't check/send MQ.  */static int ppc_regmap[] = {PT_R0 * 4,     PT_R1 * 4,     PT_R2 * 4,     PT_R3 * 4,  PT_R4 * 4,     PT_R5 * 4,     PT_R6 * 4,     PT_R7 * 4,  PT_R8 * 4,     PT_R9 * 4,     PT_R10 * 4,    PT_R11 * 4,  PT_R12 * 4,    PT_R13 * 4,    PT_R14 * 4,    PT_R15 * 4,  PT_R16 * 4,    PT_R17 * 4,    PT_R18 * 4,    PT_R19 * 4,  PT_R20 * 4,    PT_R21 * 4,    PT_R22 * 4,    PT_R23 * 4,  PT_R24 * 4,    PT_R25 * 4,    PT_R26 * 4,    PT_R27 * 4,  PT_R28 * 4,    PT_R29 * 4,    PT_R30 * 4,    PT_R31 * 4,  PT_FPR0*4,     PT_FPR0*4 + 8, PT_FPR0*4+16,  PT_FPR0*4+24,  PT_FPR0*4+32,  PT_FPR0*4+40,  PT_FPR0*4+48,  PT_FPR0*4+56,  PT_FPR0*4+64,  PT_FPR0*4+72,  PT_FPR0*4+80,  PT_FPR0*4+88,  PT_FPR0*4+96,  PT_FPR0*4+104,  PT_FPR0*4+112,  PT_FPR0*4+120,  PT_FPR0*4+128, PT_FPR0*4+136,  PT_FPR0*4+144,  PT_FPR0*4+152,  PT_FPR0*4+160,  PT_FPR0*4+168,  PT_FPR0*4+176,  PT_FPR0*4+184,  PT_FPR0*4+192,  PT_FPR0*4+200,  PT_FPR0*4+208,  PT_FPR0*4+216,  PT_FPR0*4+224,  PT_FPR0*4+232,  PT_FPR0*4+240,  PT_FPR0*4+248,  PT_NIP * 4,    PT_MSR * 4,    PT_CCR * 4,    PT_LNK * 4,  PT_CTR * 4,    PT_XER * 4,    PT_FPSCR * 4, };static intppc_cannot_store_register (int regno){  /* Some kernels do not allow us to store fpscr.  */  if (regno == find_regno ("fpscr"))    return 2;  return 0;}static intppc_cannot_fetch_register (int regno){  return 0;}static CORE_ADDRppc_get_pc (void){  unsigned long pc;  collect_register_by_name ("pc", &pc);  return (CORE_ADDR) pc;}static voidppc_set_pc (CORE_ADDR pc){  unsigned long newpc = pc;  supply_register_by_name ("pc", &newpc);}/* Correct in either endianness.  Note that this file is   for PowerPC only, not PowerPC64.   This instruction is "twge r2, r2", which GDB uses as a software   breakpoint.  */static const unsigned long ppc_breakpoint = 0x7d821008;#define ppc_breakpoint_len 4static intppc_breakpoint_at (CORE_ADDR where){  unsigned long insn;  (*the_target->read_memory) (where, (char *) &insn, 4);  if (insn == ppc_breakpoint)    return 1;  /* If necessary, recognize more trap instructions here.  GDB only uses the     one.  */  return 0;}struct linux_target_ops the_low_target = {  ppc_num_regs,  ppc_regmap,  ppc_cannot_fetch_register,  ppc_cannot_store_register,  ppc_get_pc,  ppc_set_pc,  (const char *) &ppc_breakpoint,  ppc_breakpoint_len,  NULL,  0,  ppc_breakpoint_at,};