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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [m88k-nat.c] - Blame information for rev 1773

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1 104 markom 
/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
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   Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.
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4 
   This file is part of GDB.
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6 
   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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11 
   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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21 
#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include "gdbcore.h"
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#include <sys/user.h>
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#ifndef USER                    /* added to support BCS ptrace_user */
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#define USER ptrace_user
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#endif
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include "symtab.h"
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#include "setjmp.h"
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#include "value.h"
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#ifdef DELTA88
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#include <sys/ptrace.h>
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
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#define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
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#define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
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#else
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
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#define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
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#define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
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#endif
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58 
extern int have_symbol_file_p ();
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60 
extern jmp_buf stack_jmp;
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62 
extern int errno;
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void
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fetch_inferior_registers (regno)
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     int regno;                 /* Original value discarded */
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{
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  register unsigned int regaddr;
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  char buf[MAX_REGISTER_RAW_SIZE];
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  register int i;
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72 
  struct USER u;
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  unsigned int offset;
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  offset = (char *) &u.pt_r0 - (char *) &u;
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  regaddr = offset;             /* byte offset to r0; */
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/*  offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
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  for (regno = 0; regno < NUM_REGS; regno++)
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    {
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      /*regaddr = register_addr (regno, offset); */
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      /* 88k enhancement  */
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      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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        {
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          *(int *) &buf[i] = ptrace (3, inferior_pid,
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                                     (PTRACE_ARG3_TYPE) regaddr, 0);
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          regaddr += sizeof (int);
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        }
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      supply_register (regno, buf);
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    }
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  /* now load up registers 36 - 38; special pc registers */
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  *(int *) &buf[0] = ptrace (3, inferior_pid,
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                             (PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
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  supply_register (SXIP_REGNUM, buf);
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  *(int *) &buf[0] = ptrace (3, inferior_pid,
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                             (PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
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  supply_register (SNIP_REGNUM, buf);
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  *(int *) &buf[0] = ptrace (3, inferior_pid,
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                             (PTRACE_ARG3_TYPE) SFIP_OFFSET, 0);
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  supply_register (SFIP_REGNUM, buf);
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}
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/* Store our register values back into the inferior.
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   If REGNO is -1, do this for all registers.
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   Otherwise, REGNO specifies which register (so we can save time).  */
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108 
void
109 
store_inferior_registers (regno)
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     int regno;
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{
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  register unsigned int regaddr;
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  char buf[80];
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115 
  struct USER u;
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117 
  unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
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  regaddr = offset;
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  /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
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     svr3 doesn't run on an 88110, or the kernel isolates the different (not
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     completely sure this is true, but seems to be.  */
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  if (regno >= 0)
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    {
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      /*      regaddr = register_addr (regno, offset); */
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      if (regno < PC_REGNUM)
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        {
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          regaddr = offset + regno * sizeof (int);
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          errno = 0;
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          ptrace (6, inferior_pid,
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                  (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
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          if (errno != 0)
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            {
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              sprintf (buf, "writing register number %d", regno);
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              perror_with_name (buf);
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            }
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        }
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      else if (regno == SXIP_REGNUM)
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        ptrace (6, inferior_pid,
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                (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
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      else if (regno == SNIP_REGNUM)
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        ptrace (6, inferior_pid,
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                (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
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      else if (regno == SFIP_REGNUM)
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        ptrace (6, inferior_pid,
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                (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
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      else
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        printf_unfiltered ("Bad register number for store_inferior routine\n");
150 
    }
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  else
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    {
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      for (regno = 0; regno < PC_REGNUM; regno++)
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        {
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          /*      regaddr = register_addr (regno, offset); */
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          errno = 0;
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          regaddr = offset + regno * sizeof (int);
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          ptrace (6, inferior_pid,
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                  (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
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          if (errno != 0)
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            {
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              sprintf (buf, "writing register number %d", regno);
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              perror_with_name (buf);
164 
            }
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        }
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      ptrace (6, inferior_pid,
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              (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
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      ptrace (6, inferior_pid,
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              (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
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      ptrace (6, inferior_pid,
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              (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
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    }
173 
}
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175 
 
176 
/* blockend is the address of the end of the user structure */
177 
m88k_register_u_addr (blockend, regnum)
178 
{
179 
  struct USER u;
180 
  int ustart = blockend - sizeof (struct USER);
181 
  switch (regnum)
182 
    {
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    case 0:
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    case 1:
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    case 2:
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    case 3:
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    case 4:
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    case 5:
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    case 6:
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    case 7:
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    case 8:
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    case 9:
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    case 10:
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    case 11:
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    case 12:
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    case 13:
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    case 14:
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    case 15:
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    case 16:
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    case 17:
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    case 18:
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    case 19:
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    case 20:
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    case 21:
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    case 22:
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    case 23:
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    case 24:
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    case 25:
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    case 26:
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    case 27:
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    case 28:
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    case 29:
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    case 30:
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    case 31:
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      return (ustart + ((int) &u.pt_r0 - (int) &u) + REGISTER_SIZE * regnum);
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    case PSR_REGNUM:
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      return (ustart + ((int) &u.pt_psr - (int) &u));
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    case FPSR_REGNUM:
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      return (ustart + ((int) &u.pt_fpsr - (int) &u));
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    case FPCR_REGNUM:
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      return (ustart + ((int) &u.pt_fpcr - (int) &u));
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    case SXIP_REGNUM:
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      return (ustart + SXIP_OFFSET);
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    case SNIP_REGNUM:
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      return (ustart + SNIP_OFFSET);
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    case SFIP_REGNUM:
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      return (ustart + SFIP_OFFSET);
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    default:
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      if (regnum < NUM_REGS)
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        /* The register is one of those which is not defined...
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           give it zero */
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        return (ustart + ((int) &u.pt_r0 - (int) &u));
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      else
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        return (blockend + REGISTER_SIZE * regnum);
235 
    }
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}
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238 
#ifdef USE_PROC_FS
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240 
#include <sys/procfs.h>
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242 
/*  Given a pointer to a general register set in /proc format (gregset_t *),
243 
   unpack the register contents and supply them as gdb's idea of the current
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   register values. */
245 
 
246 
void
247 
supply_gregset (gregsetp)
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     gregset_t *gregsetp;
249 
{
250 
  register int regi;
251 
  register greg_t *regp = (greg_t *) gregsetp;
252 
 
253 
  for (regi = 0; regi <= SP_REGNUM; regi++)
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    supply_register (regi, (char *) (regp + regi));
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256 
  supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
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  supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
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  supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
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  supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
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  supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
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  supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
262 
}
263 
 
264 
void
265 
fill_gregset (gregsetp, regno)
266 
     gregset_t *gregsetp;
267 
     int regno;
268 
{
269 
  int regi;
270 
  register greg_t *regp = (greg_t *) gregsetp;
271 
 
272 
  for (regi = 0; regi <= R_R31; regi++)
273 
    if ((regno == -1) || (regno == regi))
274 
      *(regp + regi) = *(int *) &registers[REGISTER_BYTE (regi)];
275 
 
276 
  if ((regno == -1) || (regno == SXIP_REGNUM))
277 
    *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE (SXIP_REGNUM)];
278 
  if ((regno == -1) || (regno == SNIP_REGNUM))
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    *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE (SNIP_REGNUM)];
280 
  if ((regno == -1) || (regno == SFIP_REGNUM))
281 
    *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE (SFIP_REGNUM)];
282 
  if ((regno == -1) || (regno == PSR_REGNUM))
283 
    *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE (PSR_REGNUM)];
284 
  if ((regno == -1) || (regno == FPSR_REGNUM))
285 
    *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE (FPSR_REGNUM)];
286 
  if ((regno == -1) || (regno == FPCR_REGNUM))
287 
    *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE (FPCR_REGNUM)];
288 
}
289 
 
290 
#endif /* USE_PROC_FS */

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