gdb/ppcnbsd-nat.c

   1 /* Native-dependent code for PowerPC's running NetBSD, for GDB.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <sys/types.h>
  22 #include <sys/ptrace.h>
  23 #include <machine/reg.h>
  24 #include <machine/frame.h>
  25
  26 #include "defs.h"
  27 #include "inferior.h"
  28 #include "gdbcore.h"
  29
  30 #define RF(dst, src) \
  31         memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
  32
  33 #define RS(src, dst) \
  34         memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
  35
  36 void
  37 fetch_inferior_registers (int regno)
  38 {
  39   struct reg inferior_registers;
  40   struct fpreg inferior_fp_registers;
  41   int i;
  42
  43   ptrace (PT_GETREGS, inferior_pid,
  44           (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  45   for (i = 0; i < 32; i++)
  46     RF (i, inferior_registers.fixreg[i]);
  47   RF (LR_REGNUM, inferior_registers.lr);
  48   RF (CR_REGNUM, inferior_registers.cr);
  49   RF (XER_REGNUM, inferior_registers.xer);
  50   RF (CTR_REGNUM, inferior_registers.ctr);
  51   RF (PC_REGNUM, inferior_registers.pc);
  52
  53   ptrace (PT_GETFPREGS, inferior_pid,
  54           (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
  55   for (i = 0; i < 32; i++)
  56     RF (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]);
  57
  58   registers_fetched ();
  59 }
  60
  61 void
  62 store_inferior_registers (int regno)
  63 {
  64   struct reg inferior_registers;
  65   struct fpreg inferior_fp_registers;
  66   int i;
  67
  68   for (i = 0; i < 32; i++)
  69     RS (i, inferior_registers.fixreg[i]);
  70   RS (LR_REGNUM, inferior_registers.lr);
  71   RS (CR_REGNUM, inferior_registers.cr);
  72   RS (XER_REGNUM, inferior_registers.xer);
  73   RS (CTR_REGNUM, inferior_registers.ctr);
  74   RS (PC_REGNUM, inferior_registers.pc);
  75
  76   ptrace (PT_SETREGS, inferior_pid,
  77           (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  78
  79   for (i = 0; i < 32; i++)
  80     RS (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]);
  81   ptrace (PT_SETFPREGS, inferior_pid,
  82           (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
  83 }
  84
  85 struct md_core
  86 {
  87   struct reg intreg;
  88   struct fpreg freg;
  89 };
  90
  91 void
  92 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
  93                       CORE_ADDR ignore)
  94 {
  95   struct md_core *core_reg = (struct md_core *) core_reg_sect;
  96   int i;
  97
  98   /* Integer registers */
  99   for (i = 0; i < 32; i++)
 100     RF (i, core_reg->intreg.fixreg[i]);
 101   RF (LR_REGNUM, core_reg->intreg.lr);
 102   RF (CR_REGNUM, core_reg->intreg.cr);
 103   RF (XER_REGNUM, core_reg->intreg.xer);
 104   RF (CTR_REGNUM, core_reg->intreg.ctr);
 105   RF (PC_REGNUM, core_reg->intreg.pc);
 106
 107   /* Floating point registers */
 108   for (i = 0; i < 32; i++)
 109     RF (FP0_REGNUM + i, core_reg->freg.r_regs[i]);
 110
 111   registers_fetched ();
 112 }
 113
 114 /* Register that we are able to handle ppcnbsd core file formats.
 115    FIXME: is this really bfd_target_unknown_flavour? */
 116
 117 static struct core_fns ppcnbsd_core_fns =
 118 {
 119   bfd_target_unknown_flavour,           /* core_flavour */
 120   default_check_format,                 /* check_format */
 121   default_core_sniffer,                 /* core_sniffer */
 122   fetch_core_registers,                 /* core_read_registers */
 123   NULL                                  /* next */
 124 };
 125
 126 void
 127 _initialize_ppcnbsd_nat (void)
 128 {
 129   add_core_fns (&ppcnbsd_core_fns);
 130 }