gdb/ppcnbsd-tdep.c

   1 /* Target-dependent code for PowerPC systems running NetBSD.
   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 "target.h"
  26 #include "breakpoint.h"
  27 #include "value.h"
  28
  29 #include "ppc-tdep.h"
  30 #include "ppcnbsd-tdep.h"
  31 #include "nbsd-tdep.h"
  32
  33 #include "solib-svr4.h"
  34
  35 #define REG_FIXREG_OFFSET(x)    ((x) * 4)
  36 #define REG_LR_OFFSET           (32 * 4)
  37 #define REG_CR_OFFSET           (33 * 4)
  38 #define REG_XER_OFFSET          (34 * 4)
  39 #define REG_CTR_OFFSET          (35 * 4)
  40 #define REG_PC_OFFSET           (36 * 4)
  41 #define SIZEOF_STRUCT_REG       (37 * 4)
  42
  43 #define FPREG_FPR_OFFSET(x)     ((x) * 8)
  44 #define FPREG_FPSCR_OFFSET      (32 * 8)
  45 #define SIZEOF_STRUCT_FPREG     (33 * 8)
  46
  47 void
  48 ppcnbsd_supply_reg (char *regs, int regno)
  49 {
  50   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  51   int i;
  52
  53   for (i = 0; i <= 31; i++)
  54     {
  55       if (regno == i || regno == -1)
  56         supply_register (i, regs + REG_FIXREG_OFFSET (i));
  57     }
  58
  59   if (regno == tdep->ppc_lr_regnum || regno == -1)
  60     supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
  61
  62   if (regno == tdep->ppc_cr_regnum || regno == -1)
  63     supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
  64
  65   if (regno == tdep->ppc_xer_regnum || regno == -1)
  66     supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
  67
  68   if (regno == tdep->ppc_ctr_regnum || regno == -1)
  69     supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
  70
  71   if (regno == PC_REGNUM || regno == -1)
  72     supply_register (PC_REGNUM, regs + REG_PC_OFFSET);
  73 }
  74
  75 void
  76 ppcnbsd_fill_reg (char *regs, int regno)
  77 {
  78   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  79   int i;
  80
  81   for (i = 0; i <= 31; i++)
  82     {
  83       if (regno == i || regno == -1)
  84         regcache_collect (i, regs + REG_FIXREG_OFFSET (i));
  85     }
  86
  87   if (regno == tdep->ppc_lr_regnum || regno == -1)
  88     regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
  89
  90   if (regno == tdep->ppc_cr_regnum || regno == -1)
  91     regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
  92
  93   if (regno == tdep->ppc_xer_regnum || regno == -1)
  94     regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
  95
  96   if (regno == tdep->ppc_ctr_regnum || regno == -1)
  97     regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
  98
  99   if (regno == PC_REGNUM || regno == -1)
 100     regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET);
 101 }
 102
 103 void
 104 ppcnbsd_supply_fpreg (char *fpregs, int regno)
 105 {
 106   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
 107   int i;
 108
 109   for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
 110     {
 111       if (regno == i || regno == -1)
 112         supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
 113     }
 114
 115   if (regno == tdep->ppc_fpscr_regnum || regno == -1)
 116     supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
 117 }
 118
 119 void
 120 ppcnbsd_fill_fpreg (char *fpregs, int regno)
 121 {
 122   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
 123   int i;
 124
 125   for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
 126     {
 127       if (regno == i || regno == -1)
 128         regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
 129     }
 130
 131   if (regno == tdep->ppc_fpscr_regnum || regno == -1)
 132     regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
 133 }
 134
 135 static void
 136 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
 137                       CORE_ADDR ignore)
 138 {
 139   char *regs, *fpregs;
 140
 141   /* We get everything from one section.  */
 142   if (which != 0)
 143     return;
 144
 145   regs = core_reg_sect;
 146   fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
 147
 148   /* Integer registers.  */
 149   ppcnbsd_supply_reg (regs, -1);
 150
 151   /* Floating point registers.  */
 152   ppcnbsd_supply_fpreg (fpregs, -1);
 153 }
 154
 155 static void
 156 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
 157                          CORE_ADDR ignore)
 158 {
 159   switch (which)
 160     {
 161     case 0:  /* Integer registers.  */
 162       if (core_reg_size != SIZEOF_STRUCT_REG)
 163         warning ("Wrong size register set in core file.");
 164       else
 165         ppcnbsd_supply_reg (core_reg_sect, -1);
 166       break;
 167
 168     case 2:  /* Floating point registers.  */
 169       if (core_reg_size != SIZEOF_STRUCT_FPREG)
 170         warning ("Wrong size FP register set in core file.");
 171       else
 172         ppcnbsd_supply_fpreg (core_reg_sect, -1);
 173       break;
 174
 175     default:
 176       /* Don't know what kind of register request this is; just ignore it.  */
 177       break;
 178     }
 179 }
 180
 181 static struct core_fns ppcnbsd_core_fns =
 182 {
 183   bfd_target_unknown_flavour,           /* core_flavour */
 184   default_check_format,                 /* check_format */
 185   default_core_sniffer,                 /* core_sniffer */
 186   fetch_core_registers,                 /* core_read_registers */
 187   NULL                                  /* next */
 188 };
 189
 190 static struct core_fns ppcnbsd_elfcore_fns =
 191 {
 192   bfd_target_elf_flavour,               /* core_flavour */
 193   default_check_format,                 /* check_format */
 194   default_core_sniffer,                 /* core_sniffer */
 195   fetch_elfcore_registers,              /* core_read_registers */
 196   NULL                                  /* next */
 197 };
 198
 199 static void
 200 ppcnbsd_init_abi (struct gdbarch_info info,
 201                   struct gdbarch *gdbarch)
 202 {
 203
 204   set_solib_svr4_fetch_link_map_offsets (gdbarch,
 205                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
 206 }
 207
 208 void
 209 _initialize_ppcnbsd_tdep (void)
 210 {
 211   gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_NETBSD_ELF,
 212                           ppcnbsd_init_abi);
 213
 214   add_core_fns (&ppcnbsd_core_fns);
 215   add_core_fns (&ppcnbsd_elfcore_fns);
 216 }