gdb/shnbsd-tdep.c

   1 /* Target-dependent code for SuperH running NetBSD, for GDB.
   2    Copyright 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "regcache.h"
  25 #include "value.h"
  26 #include "osabi.h"
  27
  28 #include "solib-svr4.h"
  29
  30 #include "nbsd-tdep.h"
  31 #include "sh-tdep.h"
  32 #include "shnbsd-tdep.h"
  33
  34 /* Convert an r0-r15 register number into an offset into a ptrace
  35    register structure.  */
  36 static const int regmap[] =
  37 {
  38   (20 * 4),     /* r0 */
  39   (19 * 4),     /* r1 */
  40   (18 * 4),     /* r2 */
  41   (17 * 4),     /* r3 */
  42   (16 * 4),     /* r4 */
  43   (15 * 4),     /* r5 */
  44   (14 * 4),     /* r6 */
  45   (13 * 4),     /* r7 */
  46   (12 * 4),     /* r8 */
  47   (11 * 4),     /* r9 */
  48   (10 * 4),     /* r10 */
  49   ( 9 * 4),     /* r11 */
  50   ( 8 * 4),     /* r12 */
  51   ( 7 * 4),     /* r13 */
  52   ( 6 * 4),     /* r14 */
  53   ( 5 * 4),     /* r15 */
  54 };
  55
  56 #define SIZEOF_STRUCT_REG (21 * 4)
  57
  58 void
  59 shnbsd_supply_reg (char *regs, int regno)
  60 {
  61   int i;
  62
  63   if (regno == PC_REGNUM || regno == -1)
  64     supply_register (PC_REGNUM, regs + (0 * 4));
  65
  66   if (regno == SR_REGNUM || regno == -1)
  67     supply_register (SR_REGNUM, regs + (1 * 4));
  68
  69   if (regno == PR_REGNUM || regno == -1)
  70     supply_register (PR_REGNUM, regs + (2 * 4));
  71
  72   if (regno == MACH_REGNUM || regno == -1)
  73     supply_register (MACH_REGNUM, regs + (3 * 4));
  74
  75   if (regno == MACL_REGNUM || regno == -1)
  76     supply_register (MACL_REGNUM, regs + (4 * 4));
  77
  78   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
  79     {
  80       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
  81         if (regno == i || regno == -1)
  82           supply_register (i, regs + regmap[i - R0_REGNUM]);
  83     }
  84 }
  85
  86 void
  87 shnbsd_fill_reg (char *regs, int regno)
  88 {
  89   int i;
  90
  91   if (regno == PC_REGNUM || regno == -1)
  92     regcache_collect (PC_REGNUM, regs + (0 * 4));
  93
  94   if (regno == SR_REGNUM || regno == -1)
  95     regcache_collect (SR_REGNUM, regs + (1 * 4));
  96
  97   if (regno == PR_REGNUM || regno == -1)
  98     regcache_collect (PR_REGNUM, regs + (2 * 4));
  99
 100   if (regno == MACH_REGNUM || regno == -1)
 101     regcache_collect (MACH_REGNUM, regs + (3 * 4));
 102
 103   if (regno == MACL_REGNUM || regno == -1)
 104     regcache_collect (MACL_REGNUM, regs + (4 * 4));
 105
 106   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
 107     {
 108       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
 109         if (regno == i || regno == -1)
 110           regcache_collect (i, regs + regmap[i - R0_REGNUM]);
 111     }
 112 }
 113
 114 static void
 115 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
 116                       int which, CORE_ADDR ignore)
 117 {
 118   /* We get everything from the .reg section.  */
 119   if (which != 0)
 120     return;
 121
 122   if (core_reg_size < SIZEOF_STRUCT_REG)
 123     {
 124       warning ("Wrong size register set in core file.");
 125       return;
 126     }
 127
 128   /* Integer registers.  */
 129   shnbsd_supply_reg (core_reg_sect, -1);
 130 }
 131
 132 static void
 133 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
 134                          int which, CORE_ADDR ignore)
 135 {
 136   switch (which)
 137     {
 138     case 0:  /* Integer registers.  */
 139       if (core_reg_size != SIZEOF_STRUCT_REG)
 140         warning ("Wrong size register set in core file.");
 141       else
 142         shnbsd_supply_reg (core_reg_sect, -1);
 143       break;
 144
 145     default:
 146       /* Don't know what kind of register request this is; just ignore it.  */
 147       break;
 148     }
 149 }
 150
 151 static struct core_fns shnbsd_core_fns =
 152 {
 153   bfd_target_unknown_flavour,           /* core_flavour */
 154   default_check_format,                 /* check_format */
 155   default_core_sniffer,                 /* core_sniffer */
 156   fetch_core_registers,                 /* core_read_registers */
 157   NULL                                  /* next */
 158 };
 159
 160 static struct core_fns shnbsd_elfcore_fns =
 161 {
 162   bfd_target_elf_flavour,               /* core_flavour */
 163   default_check_format,                 /* check_format */
 164   default_core_sniffer,                 /* core_sniffer */
 165   fetch_elfcore_registers,              /* core_read_registers */
 166   NULL                                  /* next */
 167 };
 168
 169 static int
 170 shnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 171 {
 172   /* FIXME: Need to add support for kernel-provided signal trampolines.  */
 173   return (nbsd_pc_in_sigtramp (pc, func_name));
 174 }
 175
 176 static void
 177 shnbsd_init_abi (struct gdbarch_info info,
 178                   struct gdbarch *gdbarch)
 179 {
 180   set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, shnbsd_pc_in_sigtramp);
 181
 182   set_solib_svr4_fetch_link_map_offsets (gdbarch,
 183                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
 184 }
 185
 186 void
 187 _initialize_shnbsd_tdep (void)
 188 {
 189   add_core_fns (&shnbsd_core_fns);
 190   add_core_fns (&shnbsd_elfcore_fns);
 191
 192   gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_NETBSD_ELF,
 193                           shnbsd_init_abi);
 194 }