gdb/shnbsd-tdep.c

   1 /* Target-dependent code for SuperH running NetBSD, for GDB.
   2    Copyright 2002 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
  27 #include "solib-svr4.h"
  28
  29 #include "nbsd-tdep.h"
  30 #include "sh-tdep.h"
  31 #include "shnbsd-tdep.h"
  32
  33 /* Convert an r0-r15 register number into an offset into a ptrace
  34    register structure.  */
  35 static const int regmap[] =
  36 {
  37   (20 * 4),     /* r0 */
  38   (19 * 4),     /* r1 */
  39   (18 * 4),     /* r2 */
  40   (17 * 4),     /* r3 */
  41   (16 * 4),     /* r4 */
  42   (15 * 4),     /* r5 */
  43   (14 * 4),     /* r6 */
  44   (13 * 4),     /* r7 */
  45   (12 * 4),     /* r8 */
  46   (11 * 4),     /* r9 */
  47   (10 * 4),     /* r10 */
  48   ( 9 * 4),     /* r11 */
  49   ( 8 * 4),     /* r12 */
  50   ( 7 * 4),     /* r13 */
  51   ( 6 * 4),     /* r14 */
  52   ( 5 * 4),     /* r15 */
  53 };
  54
  55 #define SIZEOF_STRUCT_REG (21 * 4)
  56
  57 void
  58 shnbsd_supply_reg (char *regs, int regno)
  59 {
  60   int i;
  61
  62   if (regno == PC_REGNUM || regno == -1)
  63     supply_register (PC_REGNUM, regs + (0 * 4));
  64
  65   if (regno == SR_REGNUM || regno == -1)
  66     supply_register (SR_REGNUM, regs + (1 * 4));
  67
  68   if (regno == PR_REGNUM || regno == -1)
  69     supply_register (PR_REGNUM, regs + (2 * 4));
  70
  71   if (regno == MACH_REGNUM || regno == -1)
  72     supply_register (MACH_REGNUM, regs + (3 * 4));
  73
  74   if (regno == MACL_REGNUM || regno == -1)
  75     supply_register (MACL_REGNUM, regs + (4 * 4));
  76
  77   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
  78     {
  79       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
  80         if (regno == i || regno == -1)
  81           supply_register (i, regs + regmap[i - R0_REGNUM]);
  82     }
  83 }
  84
  85 void
  86 shnbsd_fill_reg (char *regs, int regno)
  87 {
  88   int i;
  89
  90   if (regno == PC_REGNUM || regno == -1)
  91     regcache_collect (PC_REGNUM, regs + (0 * 4));
  92
  93   if (regno == SR_REGNUM || regno == -1)
  94     regcache_collect (SR_REGNUM, regs + (1 * 4));
  95
  96   if (regno == PR_REGNUM || regno == -1)
  97     regcache_collect (PR_REGNUM, regs + (2 * 4));
  98
  99   if (regno == MACH_REGNUM || regno == -1)
 100     regcache_collect (MACH_REGNUM, regs + (3 * 4));
 101
 102   if (regno == MACL_REGNUM || regno == -1)
 103     regcache_collect (MACL_REGNUM, regs + (4 * 4));
 104
 105   if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)
 106     {
 107       for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
 108         if (regno == i || regno == -1)
 109           regcache_collect (i, regs + regmap[i - R0_REGNUM]);
 110     }
 111 }
 112
 113 static void
 114 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
 115                       int which, CORE_ADDR ignore)
 116 {
 117   /* We get everything from the .reg section.  */
 118   if (which != 0)
 119     return;
 120
 121   if (core_reg_size < SIZEOF_STRUCT_REG)
 122     {
 123       warning ("Wrong size register set in core file.");
 124       return;
 125     }
 126
 127   /* Integer registers.  */
 128   shnbsd_supply_reg (core_reg_sect, -1);
 129 }
 130
 131 static void
 132 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
 133                          int which, CORE_ADDR ignore)
 134 {
 135   switch (which)
 136     {
 137     case 0:  /* Integer registers.  */
 138       if (core_reg_size != SIZEOF_STRUCT_REG)
 139         warning ("Wrong size register set in core file.");
 140       else
 141         shnbsd_supply_reg (core_reg_sect, -1);
 142       break;
 143
 144     default:
 145       /* Don't know what kind of register request this is; just ignore it.  */
 146       break;
 147     }
 148 }
 149
 150 static struct core_fns shnbsd_core_fns =
 151 {
 152   bfd_target_unknown_flavour,           /* core_flavour */
 153   default_check_format,                 /* check_format */
 154   default_core_sniffer,                 /* core_sniffer */
 155   fetch_core_registers,                 /* core_read_registers */
 156   NULL                                  /* next */
 157 };
 158
 159 static struct core_fns shnbsd_elfcore_fns =
 160 {
 161   bfd_target_elf_flavour,               /* core_flavour */
 162   default_check_format,                 /* check_format */
 163   default_core_sniffer,                 /* core_sniffer */
 164   fetch_elfcore_registers,              /* core_read_registers */
 165   NULL                                  /* next */
 166 };
 167
 168 static int
 169 shnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 170 {
 171   /* FIXME: Need to add support for kernel-provided signal trampolines.  */
 172   return (nbsd_pc_in_sigtramp (pc, func_name));
 173 }
 174
 175 static void
 176 shnbsd_init_abi (struct gdbarch_info info,
 177                   struct gdbarch *gdbarch)
 178 {
 179   set_gdbarch_pc_in_sigtramp (gdbarch, shnbsd_pc_in_sigtramp);
 180
 181   set_solib_svr4_fetch_link_map_offsets (gdbarch,
 182                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
 183 }
 184
 185 void
 186 _initialize_shnbsd_tdep (void)
 187 {
 188   add_core_fns (&shnbsd_core_fns);
 189   add_core_fns (&shnbsd_elfcore_fns);
 190
 191   gdbarch_register_osabi (bfd_arch_sh, GDB_OSABI_NETBSD_ELF, shnbsd_init_abi);
 192 }