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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [gdbserver/] [linux-sh-low.c] - Blame information for rev 24

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1 24 jeremybenn
/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
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   Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007,
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   2008 Free Software Foundation, Inc.
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   This file is part of GDB.
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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 License as published by
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   the Free Software Foundation; either version 3 of the License, 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 License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "server.h"
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#include "linux-low.h"
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#include <asm/ptrace.h>
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#define sh_num_regs 41
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/* Currently, don't check/send MQ.  */
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static int sh_regmap[] = {
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 0,      4,      8,      12,     16,     20,     24,     28,
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 32,    36,     40,     44,     48,     52,     56,     60,
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 REG_PC*4,   REG_PR*4,   REG_GBR*4,  -1,
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 REG_MACH*4, REG_MACL*4, REG_SR*4,
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 REG_FPUL*4, REG_FPSCR*4,
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 REG_FPREG0*4+0,   REG_FPREG0*4+4,   REG_FPREG0*4+8,   REG_FPREG0*4+12,
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 REG_FPREG0*4+16,  REG_FPREG0*4+20,  REG_FPREG0*4+24,  REG_FPREG0*4+28,
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 REG_FPREG0*4+32,  REG_FPREG0*4+36,  REG_FPREG0*4+40,  REG_FPREG0*4+44,
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 REG_FPREG0*4+48,  REG_FPREG0*4+52,  REG_FPREG0*4+56,  REG_FPREG0*4+60,
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};
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static int
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sh_cannot_store_register (int regno)
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{
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  return 0;
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}
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static int
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sh_cannot_fetch_register (int regno)
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{
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  return 0;
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}
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static CORE_ADDR
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sh_get_pc ()
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{
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  unsigned long pc;
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  collect_register_by_name ("pc", &pc);
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  return pc;
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}
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static void
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sh_set_pc (CORE_ADDR pc)
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{
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  unsigned long newpc = pc;
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  supply_register_by_name ("pc", &newpc);
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}
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/* Correct in either endianness, obviously.  */
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static const unsigned short sh_breakpoint = 0xc3c3;
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#define sh_breakpoint_len 2
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static int
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sh_breakpoint_at (CORE_ADDR where)
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{
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  unsigned short insn;
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  (*the_target->read_memory) (where, (unsigned char *) &insn, 2);
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  if (insn == sh_breakpoint)
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    return 1;
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  /* If necessary, recognize more trap instructions here.  GDB only uses the
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     one.  */
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  return 0;
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}
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/* Provide only a fill function for the general register set.  ps_lgetregs
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   will use this for NPTL support.  */
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static void sh_fill_gregset (void *buf)
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{
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  int i;
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  for (i = 0; i < 23; i++)
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    if (sh_regmap[i] != -1)
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      collect_register (i, (char *) buf + sh_regmap[i]);
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}
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struct regset_info target_regsets[] = {
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  { 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
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  { 0, 0, -1, -1, NULL, NULL }
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};
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struct linux_target_ops the_low_target = {
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  sh_num_regs,
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  sh_regmap,
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  sh_cannot_fetch_register,
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  sh_cannot_store_register,
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  sh_get_pc,
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  sh_set_pc,
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  (const unsigned char *) &sh_breakpoint,
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  sh_breakpoint_len,
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  NULL,
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  0,
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  sh_breakpoint_at,
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};

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