gdb/shnbsd-tdep.c

   1 /* Target-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002, 2003, 2006, 2007 Free Software Foundation, Inc.
   4
   5    Contributed by Wasabi Systems, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, USA.  */
  23
  24 #include "defs.h"
  25 #include "gdbcore.h"
  26 #include "regcache.h"
  27 #include "value.h"
  28 #include "osabi.h"
  29
  30 #include "solib-svr4.h"
  31
  32 #include "nbsd-tdep.h"
  33 #include "sh-tdep.h"
  34 #include "shnbsd-tdep.h"
  35
  36 /* Convert an r0-r15 register number into an offset into a ptrace
  37    register structure.  */
  38 static const int regmap[] =
  39 {
  40   (20 * 4),     /* r0 */
  41   (19 * 4),     /* r1 */
  42   (18 * 4),     /* r2 */
  43   (17 * 4),     /* r3 */
  44   (16 * 4),     /* r4 */
  45   (15 * 4),     /* r5 */
  46   (14 * 4),     /* r6 */
  47   (13 * 4),     /* r7 */
  48   (12 * 4),     /* r8 */
  49   (11 * 4),     /* r9 */
  50   (10 * 4),     /* r10 */
  51   ( 9 * 4),     /* r11 */
  52   ( 8 * 4),     /* r12 */
  53   ( 7 * 4),     /* r13 */
  54   ( 6 * 4),     /* r14 */
  55   ( 5 * 4),     /* r15 */
  56 };
  57
  58 #define SIZEOF_STRUCT_REG (21 * 4)
  59
  60 void
  61 shnbsd_supply_reg (char *regs, int regno)
  62 {
  63   int i;
  64
  65   if (regno == PC_REGNUM || regno == -1)
  66     regcache_raw_supply (current_regcache, PC_REGNUM, regs + (0 * 4));
  67
  68   if (regno == SR_REGNUM || regno == -1)
  69     regcache_raw_supply (current_regcache, SR_REGNUM, regs + (1 * 4));
  70
  71   if (regno == PR_REGNUM || regno == -1)
  72     regcache_raw_supply (current_regcache, PR_REGNUM, regs + (2 * 4));
  73
  74   if (regno == MACH_REGNUM || regno == -1)
  75     regcache_raw_supply (current_regcache, MACH_REGNUM, regs + (3 * 4));
  76
  77   if (regno == MACL_REGNUM || regno == -1)
  78     regcache_raw_supply (current_regcache, MACL_REGNUM, regs + (4 * 4));
  79
  80   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
  81     {
  82       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
  83         if (regno == i || regno == -1)
  84           regcache_raw_supply (current_regcache, i,
  85                                regs + regmap[i - R0_REGNUM]);
  86     }
  87 }
  88
  89 void
  90 shnbsd_fill_reg (char *regs, int regno)
  91 {
  92   int i;
  93
  94   if (regno == PC_REGNUM || regno == -1)
  95     regcache_raw_collect (current_regcache, PC_REGNUM, regs + (0 * 4));
  96
  97   if (regno == SR_REGNUM || regno == -1)
  98     regcache_raw_collect (current_regcache, SR_REGNUM, regs + (1 * 4));
  99
 100   if (regno == PR_REGNUM || regno == -1)
 101     regcache_raw_collect (current_regcache, PR_REGNUM, regs + (2 * 4));
 102
 103   if (regno == MACH_REGNUM || regno == -1)
 104     regcache_raw_collect (current_regcache, MACH_REGNUM, regs + (3 * 4));
 105
 106   if (regno == MACL_REGNUM || regno == -1)
 107     regcache_raw_collect (current_regcache, MACL_REGNUM, regs + (4 * 4));
 108
 109   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
 110     {
 111       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
 112         if (regno == i || regno == -1)
 113           regcache_raw_collect (current_regcache, i,
 114                                 regs + regmap[i - R0_REGNUM]);
 115     }
 116 }
 117
 118 static void
 119 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
 120                       int which, CORE_ADDR ignore)
 121 {
 122   /* We get everything from the .reg section.  */
 123   if (which != 0)
 124     return;
 125
 126   if (core_reg_size < SIZEOF_STRUCT_REG)
 127     {
 128       warning (_("Wrong size register set in core file."));
 129       return;
 130     }
 131
 132   /* Integer registers.  */
 133   shnbsd_supply_reg (core_reg_sect, -1);
 134 }
 135
 136 static void
 137 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
 138                          int which, CORE_ADDR ignore)
 139 {
 140   switch (which)
 141     {
 142     case 0:  /* Integer registers.  */
 143       if (core_reg_size != SIZEOF_STRUCT_REG)
 144         warning (_("Wrong size register set in core file."));
 145       else
 146         shnbsd_supply_reg (core_reg_sect, -1);
 147       break;
 148
 149     default:
 150       /* Don't know what kind of register request this is; just ignore it.  */
 151       break;
 152     }
 153 }
 154
 155 static struct core_fns shnbsd_core_fns =
 156 {
 157   bfd_target_unknown_flavour,           /* core_flavour */
 158   default_check_format,                 /* check_format */
 159   default_core_sniffer,                 /* core_sniffer */
 160   fetch_core_registers,                 /* core_read_registers */
 161   NULL                                  /* next */
 162 };
 163
 164 static struct core_fns shnbsd_elfcore_fns =
 165 {
 166   bfd_target_elf_flavour,               /* core_flavour */
 167   default_check_format,                 /* check_format */
 168   default_core_sniffer,                 /* core_sniffer */
 169   fetch_elfcore_registers,              /* core_read_registers */
 170   NULL                                  /* next */
 171 };
 172
 173 static void
 174 shnbsd_init_abi (struct gdbarch_info info,
 175                   struct gdbarch *gdbarch)
 176 {
 177   set_solib_svr4_fetch_link_map_offsets (gdbarch,
 178                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
 179 }
 180
 181 void
 182 _initialize_shnbsd_tdep (void)
 183 {
 184   deprecated_add_core_fns (&shnbsd_core_fns);
 185   deprecated_add_core_fns (&shnbsd_elfcore_fns);
 186
 187   gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_NETBSD_ELF,
 188                           shnbsd_init_abi);
 189   gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_OPENBSD_ELF,
 190                           shnbsd_init_abi);
 191 }