gdb/gdbserver/linux-m32r-low.c

   1 /* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
   2    Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include "server.h"
  20 #include "linux-low.h"
  21
  22 #ifdef HAVE_SYS_REG_H
  23 #include <sys/reg.h>
  24 #endif
  25
  26 /* Defined in auto-generated file reg-m32r.c.  */
  27 void init_registers_m32r (void);
  28
  29 #define m32r_num_regs 25
  30
  31 static int m32r_regmap[] = {
  32 #ifdef PT_R0
  33   PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
  34   PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
  35   PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
  36 #else
  37   4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
  38   4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
  39   4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
  40 #endif
  41 };
  42
  43 static int
  44 m32r_cannot_store_register (int regno)
  45 {
  46   return (regno >= m32r_num_regs);
  47 }
  48
  49 static int
  50 m32r_cannot_fetch_register (int regno)
  51 {
  52   return (regno >= m32r_num_regs);
  53 }
  54
  55 static CORE_ADDR
  56 m32r_get_pc ()
  57 {
  58   unsigned long pc;
  59   collect_register_by_name ("pc", &pc);
  60   return pc;
  61 }
  62
  63 static void
  64 m32r_set_pc (CORE_ADDR pc)
  65 {
  66   unsigned long newpc = pc;
  67   supply_register_by_name ("pc", &newpc);
  68 }
  69
  70 static const unsigned short m32r_breakpoint = 0x10f1;
  71 #define m32r_breakpoint_len 2
  72
  73 static int
  74 m32r_breakpoint_at (CORE_ADDR where)
  75 {
  76   unsigned short insn;
  77
  78   (*the_target->read_memory) (where, (unsigned char *) &insn,
  79                               m32r_breakpoint_len);
  80   if (insn == m32r_breakpoint)
  81     return 1;
  82
  83   /* If necessary, recognize more trap instructions here.  GDB only uses the
  84      one.  */
  85   return 0;
  86 }
  87
  88 struct linux_target_ops the_low_target = {
  89   init_registers_m32r,
  90   m32r_num_regs,
  91   m32r_regmap,
  92   m32r_cannot_fetch_register,
  93   m32r_cannot_store_register,
  94   m32r_get_pc,
  95   m32r_set_pc,
  96   (const unsigned char *) &m32r_breakpoint,
  97   m32r_breakpoint_len,
  98   NULL,
  99   0,
 100   m32r_breakpoint_at,
 101 };