[deliverable/binutils-gdb.git] / gdb / m88k-nat.c

/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
   Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "defs.h"
#include "frame.h"
#include "inferior.h"

#ifdef USG
#include <sys/types.h>
#endif

#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include "gdbcore.h"
#include <sys/user.h>

#ifndef USER			/* added to support BCS ptrace_user */
#define USER ptrace_user
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>

#include "symtab.h"
#include "setjmp.h"
#include "value.h"

#ifdef DELTA88
#include <sys/ptrace.h>

/* define offsets to the pc instruction offsets in ptrace_user struct */
#define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
#define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
#define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
#else
/* define offsets to the pc instruction offsets in ptrace_user struct */
#define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
#define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
#define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
#endif

extern int have_symbol_file_p();

extern jmp_buf stack_jmp;

extern int errno;
extern char registers[REGISTER_BYTES];

void
fetch_inferior_registers (regno)
     int regno;		/* Original value discarded */
{
  register unsigned int regaddr;
  char buf[MAX_REGISTER_RAW_SIZE];
  register int i;

  struct USER u;
  unsigned int offset;

  offset = (char *) &u.pt_r0 - (char *) &u; 
  regaddr = offset; /* byte offset to r0;*/

/*  offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
  for (regno = 0; regno < NUM_REGS; regno++)
    {
      /*regaddr = register_addr (regno, offset);*/
	/* 88k enhancement  */
        
      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
 	{
 	  *(int *) &buf[i] = ptrace (3, inferior_pid,
				     (PTRACE_ARG3_TYPE) regaddr, 0);
 	  regaddr += sizeof (int);
 	}
      supply_register (regno, buf);
    }
    /* now load up registers 36 - 38; special pc registers */
    *(int *) &buf[0] = ptrace (3,inferior_pid,
			       (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
    supply_register (SXIP_REGNUM, buf);
    *(int *) &buf[0] = ptrace (3, inferior_pid,
			       (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
    supply_register (SNIP_REGNUM, buf);
    *(int *) &buf[0] = ptrace (3, inferior_pid,
			       (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
    supply_register (SFIP_REGNUM, buf);
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

void
store_inferior_registers (regno)
     int regno;
{
  register unsigned int regaddr;
  char buf[80];

  struct USER u;


  unsigned int offset = (char *) &u.pt_r0 - (char *) &u;

  regaddr = offset;

  if (regno >= 0)
    {
/*      regaddr = register_addr (regno, offset); */
        if (regno < PC_REGNUM)
           { 
	     regaddr = offset + regno * sizeof (int);
             errno = 0;
             ptrace (6, inferior_pid,
		     (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
             if (errno != 0)
	       {
	         sprintf (buf, "writing register number %d", regno);
	         perror_with_name (buf);
	       }
           }
	else if (regno == SXIP_REGNUM)
             ptrace (6, inferior_pid,
		     (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
	else if (regno == SNIP_REGNUM)
	     ptrace (6, inferior_pid,
		     (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
	else if (regno == SFIP_REGNUM)
	     ptrace (6, inferior_pid,
		     (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
	else printf ("Bad register number for store_inferior routine\n");
    }
  else { 
         for (regno = 0; regno < NUM_REGS - 3; regno++)
           {
      /*      regaddr = register_addr (regno, offset); */
              errno = 0;
              regaddr = offset + regno * sizeof (int);
              ptrace (6, inferior_pid,
		      (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
              if (errno != 0)
         	{
	          sprintf (buf, "writing register number %d", regno);
	          perror_with_name (buf);
	        }
           }
	 ptrace (6,inferior_pid,
		 (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
	 ptrace (6,inferior_pid,
		 (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
	 ptrace (6,inferior_pid,
		 (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
       }	
           

}


/* blockend is the address of the end of the user structure */
m88k_register_u_addr (blockend, regnum)
{
  struct USER u;
  int ustart = blockend - sizeof (struct USER);
  switch (regnum)
    {
    case 0:
    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
    case 10:
    case 11:
    case 12:
    case 13:
    case 14:
    case 15:
    case 16:
    case 17:
    case 18:
    case 19:
    case 20:
    case 21:
    case 22:
    case 23:
    case 24:
    case 25:
    case 26:
    case 27:
    case 28:
    case 29:
    case 30:
    case 31:          return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
    case PSR_REGNUM:  return (ustart + ((int) &u.pt_psr - (int) &u));
    case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
    case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
    case SXIP_REGNUM: return (ustart + SXIP_OFFSET); 
    case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
    case SFIP_REGNUM: return (ustart + SFIP_OFFSET); 
    default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
    }
}
Commit	Line	Data
173a4f1b RP	1	/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
	2	Copyright 1988, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20	#include "defs.h"
	21	#include "frame.h"
	22	#include "inferior.h"
	23
	24	#ifdef USG
	25	#include <sys/types.h>
	26	#endif
	27
	28	#include <sys/param.h>
	29	#include <sys/dir.h>
	30	#include <signal.h>
	31	#include "gdbcore.h"
	32	#include <sys/user.h>
	33
	34	#ifndef USER /* added to support BCS ptrace_user */
	35	#define USER ptrace_user
	36	#endif
	37	#include <sys/ioctl.h>
	38	#include <fcntl.h>
	39	#include <sys/file.h>
	40	#include <sys/stat.h>
	41
	42	#include "symtab.h"
	43	#include "setjmp.h"
	44	#include "value.h"
	45
	46	#ifdef DELTA88
fc61e9ee	47	#include <sys/ptrace.h>
173a4f1b RP	48
173a4f1b RP	49	/* define offsets to the pc instruction offsets in ptrace_user struct */
e5bb7e61 FF	50	#define SXIP_OFFSET ((char )&u.pt_sigframe.sig_sxip - (char )&u)
	51	#define SNIP_OFFSET ((char )&u.pt_sigframe.sig_snip - (char )&u)
	52	#define SFIP_OFFSET ((char )&u.pt_sigframe.sig_sfip - (char )&u)
173a4f1b RP	53	#else
173a4f1b RP	54	/* define offsets to the pc instruction offsets in ptrace_user struct */
e5bb7e61 FF	55	#define SXIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sxip - (char )&u)
	56	#define SNIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_snip - (char )&u)
	57	#define SFIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sfip - (char )&u)
173a4f1b RP	58	#endif
	59
	60	extern int have_symbol_file_p();
	61
	62	extern jmp_buf stack_jmp;
	63
	64	extern int errno;
	65	extern char registers[REGISTER_BYTES];
	66
	67	void
	68	fetch_inferior_registers (regno)
	69	int regno; /* Original value discarded */
	70	{
	71	register unsigned int regaddr;
	72	char buf[MAX_REGISTER_RAW_SIZE];
	73	register int i;
	74
	75	struct USER u;
	76	unsigned int offset;
	77
	78	offset = (char ) &u.pt_r0 - (char ) &u;
	79	regaddr = offset; /* byte offset to r0;*/
	80
	81	/* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
	82	for (regno = 0; regno < NUM_REGS; regno++)
	83	{
	84	/regaddr = register_addr (regno, offset);/
	85	/* 88k enhancement */
	86
	87	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
	88	{
	89	(int ) &buf[i] = ptrace (3, inferior_pid,
	90	(PTRACE_ARG3_TYPE) regaddr, 0);
	91	regaddr += sizeof (int);
	92	}
	93	supply_register (regno, buf);
	94	}
	95	/* now load up registers 36 - 38; special pc registers */
	96	(int ) &buf[0] = ptrace (3,inferior_pid,
	97	(PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
	98	supply_register (SXIP_REGNUM, buf);
	99	(int ) &buf[0] = ptrace (3, inferior_pid,
	100	(PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
	101	supply_register (SNIP_REGNUM, buf);
	102	(int ) &buf[0] = ptrace (3, inferior_pid,
	103	(PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
	104	supply_register (SFIP_REGNUM, buf);
	105	}
	106
	107	/* Store our register values back into the inferior.
	108	If REGNO is -1, do this for all registers.
	109	Otherwise, REGNO specifies which register (so we can save time). */
	110
	111	void
	112	store_inferior_registers (regno)
	113	int regno;
	114	{
	115	register unsigned int regaddr;
	116	char buf[80];
	117
	118	struct USER u;
	119
	120
	121	unsigned int offset = (char ) &u.pt_r0 - (char ) &u;
122
123	regaddr = offset;
124
125	if (regno >= 0)
126	{
127	/* regaddr = register_addr (regno, offset); */
128	if (regno < PC_REGNUM)
129	{
130	regaddr = offset + regno * sizeof (int);
131	errno = 0;
132	ptrace (6, inferior_pid,
133	(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
134	if (errno != 0)
135	{
136	sprintf (buf, "writing register number %d", regno);
137	perror_with_name (buf);
138	}
139	}
140	else if (regno == SXIP_REGNUM)
141	ptrace (6, inferior_pid,
142	(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
143	else if (regno == SNIP_REGNUM)
144	ptrace (6, inferior_pid,
145	(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
146	else if (regno == SFIP_REGNUM)
147	ptrace (6, inferior_pid,
148	(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
149	else printf ("Bad register number for store_inferior routine\n");
150	}
151	else {
152	for (regno = 0; regno < NUM_REGS - 3; regno++)
153	{
154	/* regaddr = register_addr (regno, offset); */
155	errno = 0;
156	regaddr = offset + regno * sizeof (int);
157	ptrace (6, inferior_pid,
158	(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
159	if (errno != 0)
160	{
161	sprintf (buf, "writing register number %d", regno);
162	perror_with_name (buf);
163	}
164	}
165	ptrace (6,inferior_pid,
166	(PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
167	ptrace (6,inferior_pid,
168	(PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
169	ptrace (6,inferior_pid,
170	(PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
171	}
172
173
174	}
175
176
177	/* blockend is the address of the end of the user structure */
178	m88k_register_u_addr (blockend, regnum)
179	{
180	struct USER u;
181	int ustart = blockend - sizeof (struct USER);
182	switch (regnum)
183	{
184	case 0:
185	case 1:
186	case 2:
187	case 3:
188	case 4:
189	case 5:
190	case 6:
191	case 7:
192	case 8:
193	case 9:
194	case 10:
195	case 11:
196	case 12:
197	case 13:
198	case 14:
199	case 15:
200	case 16:
201	case 17:
202	case 18:
203	case 19:
204	case 20:
205	case 21:
206	case 22:
207	case 23:
208	case 24:
209	case 25:
210	case 26:
211	case 27:
212	case 28:
213	case 29:
214	case 30:
215	case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
216	case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
217	case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
218	case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
219	case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
220	case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
221	case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
222	default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
223	}
224	}
225