gdb/ppcnbsd-nat.c

   1 /* Native-dependent code for PowerPC's running NetBSD, for GDB.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001
   3    Free Software Foundation, 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 <sys/types.h>
  23 #include <sys/ptrace.h>
  24 #include <machine/reg.h>
  25 #include <machine/frame.h>
  26
  27 #include "defs.h"
  28 #include "inferior.h"
  29 #include "gdbcore.h"
  30 #include "ppc-tdep.h"
  31 #include "regcache.h"
  32
  33 #define RF(dst, src) \
  34         memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
  35
  36 #define RS(src, dst) \
  37         memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
  38
  39 void
  40 fetch_inferior_registers (int regno)
  41 {
  42   struct reg inferior_registers;
  43 #ifdef PT_GETFPREGS
  44   struct fpreg inferior_fp_registers;
  45 #endif
  46   int i;
  47
  48   ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  49           (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  50   for (i = 0; i < 32; i++)
  51     RF (i, inferior_registers.fixreg[i]);
  52   RF (PPC_LR_REGNUM, inferior_registers.lr);
  53   RF (PPC_CR_REGNUM, inferior_registers.cr);
  54   RF (PPC_XER_REGNUM, inferior_registers.xer);
  55   RF (PPC_CTR_REGNUM, inferior_registers.ctr);
  56   RF (PC_REGNUM, inferior_registers.pc);
  57
  58 #ifdef PT_GETFPREGS
  59   ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  60           (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
  61   for (i = 0; i < 32; i++)
  62     RF (FP0_REGNUM + i, inferior_fp_registers.fpreg[i]);
  63 #endif
  64
  65   registers_fetched ();
  66 }
  67
  68 void
  69 store_inferior_registers (int regno)
  70 {
  71   struct reg inferior_registers;
  72 #ifdef PT_SETFPREGS
  73   struct fpreg inferior_fp_registers;
  74 #endif
  75   int i;
  76
  77   for (i = 0; i < 32; i++)
  78     RS (i, inferior_registers.fixreg[i]);
  79   RS (PPC_LR_REGNUM, inferior_registers.lr);
  80   RS (PPC_CR_REGNUM, inferior_registers.cr);
  81   RS (PPC_XER_REGNUM, inferior_registers.xer);
  82   RS (PPC_CTR_REGNUM, inferior_registers.ctr);
  83   RS (PC_REGNUM, inferior_registers.pc);
  84
  85   ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  86           (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  87
  88 #ifdef PT_SETFPREGS
  89   for (i = 0; i < 32; i++)
  90     RS (FP0_REGNUM + i, inferior_fp_registers.fpreg[i]);
  91   ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
  92           (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
  93 #endif
  94 }
  95
  96 struct md_core
  97 {
  98   struct reg intreg;
  99 #ifdef PT_GETFPREGS
 100   struct fpreg freg;
 101 #endif
 102 };
 103
 104 void
 105 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
 106                       CORE_ADDR ignore)
 107 {
 108   struct md_core *core_reg = (struct md_core *) core_reg_sect;
 109   int i;
 110
 111   /* Integer registers */
 112   for (i = 0; i < 32; i++)
 113     RF (i, core_reg->intreg.fixreg[i]);
 114   RF (PPC_LR_REGNUM, core_reg->intreg.lr);
 115   RF (PPC_CR_REGNUM, core_reg->intreg.cr);
 116   RF (PPC_XER_REGNUM, core_reg->intreg.xer);
 117   RF (PPC_CTR_REGNUM, core_reg->intreg.ctr);
 118   RF (PC_REGNUM, core_reg->intreg.pc);
 119
 120 #ifdef PT_FPGETREGS
 121   /* Floating point registers */
 122   for (i = 0; i < 32; i++)
 123     RF (FP0_REGNUM + i, core_reg->freg.fpreg[i]);
 124 #endif
 125
 126   registers_fetched ();
 127 }
 128
 129 /* Register that we are able to handle ppcnbsd core file formats.
 130    FIXME: is this really bfd_target_unknown_flavour? */
 131
 132 static struct core_fns ppcnbsd_core_fns =
 133 {
 134   bfd_target_unknown_flavour,           /* core_flavour */
 135   default_check_format,                 /* check_format */
 136   default_core_sniffer,                 /* core_sniffer */
 137   fetch_core_registers,                 /* core_read_registers */
 138   NULL                                  /* next */
 139 };
 140
 141 void
 142 _initialize_ppcnbsd_nat (void)
 143 {
 144   add_core_fns (&ppcnbsd_core_fns);
 145 }