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

/* Host-dependent Motorola 88xxx support for GDB, the GNU Debugger.
   Copyright 1988, 1990, 1991 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];
\f
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, 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, 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,SXIP_OFFSET ,0);
    supply_register (SXIP_REGNUM, buf);
    *(int *) &buf[0] = ptrace (3, inferior_pid,SNIP_OFFSET,0);
    supply_register (SNIP_REGNUM, buf);
    *(int *) &buf[0] = ptrace (3, inferior_pid,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, 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, SXIP_OFFSET, read_register(regno));
	else if (regno == SNIP_REGNUM)
	     ptrace (6, inferior_pid, SNIP_OFFSET, read_register(regno));
	else if (regno == SFIP_REGNUM)
	     ptrace (6, inferior_pid, 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, regaddr, read_register (regno));
              if (errno != 0)
         	{
	          sprintf (buf, "writing register number %d", regno);
	          perror_with_name (buf);
	        }
           }
	 ptrace (6,inferior_pid,SXIP_OFFSET,read_register(SXIP_REGNUM));
	 ptrace (6,inferior_pid,SNIP_OFFSET,read_register(SNIP_REGNUM));
	 ptrace (6,inferior_pid,SFIP_OFFSET,read_register(SFIP_REGNUM));
       }	
           

}

#if 0
/* Core files are now a function of BFD.  */
\f
void
core_file_command (filename, from_tty)
     char *filename;
     int from_tty;
{
  int val;
  extern char registers[];

  /* Need symbol file and one with tdesc info for corefiles to work */
  if (!have_symbol_file_p())
    error ("Requires symbol-file and exec-file");
  if (!execfile)
    error ("Requires exec-file and symbol-file");

  /* Discard all vestiges of any previous core file
     and mark data and stack spaces as empty.  */

  if (corefile)
    free (corefile);
  corefile = 0;

  if (corechan >= 0)
    close (corechan);
  corechan = -1;

  data_start = 0;
  data_end = 0;
  stack_start = STACK_END_ADDR;
  stack_end = STACK_END_ADDR;

  /* Now, if a new core file was specified, open it and digest it.  */

  if (filename)
    {
      filename = tilde_expand (filename);
      make_cleanup (free, filename);
      
      if (have_inferior_p ())
	error ("To look at a core file, you must kill the inferior with \"kill\".");
      corechan = open (filename, O_RDONLY, 0);
      if (corechan < 0)
	perror_with_name (filename);
      /* 4.2-style (and perhaps also sysV-style) core dump file.  */
      {
	struct USER u;

	int reg_offset;

	val = myread (corechan, &u, sizeof u);
	if (val < 0)
	  perror_with_name (filename);
	data_start = u.pt_o_data_start;

	data_end = data_start +  u.pt_dsize;
	stack_start = stack_end -  u.pt_ssize;
	data_offset = u.pt_dataptr;
	stack_offset = data_offset + u.pt_dsize;

#if defined(BCS)
#if defined(DGUX)

	  reg_offset = 2048;


#endif /* defined (DGUX) */
#else

	/* original code: */
	reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR;

#endif /* defined(BCS) */

	/* I don't know where to find this info.
	   So, for now, mark it as not available.  */
/*	N_SET_MAGIC (core_aouthdr, 0);  */
	bzero ((char *) &core_aouthdr, sizeof core_aouthdr);

	/* Read the register values out of the core file and store
	   them where `read_register' will find them.  */

	{
	  register int regno;

	  for (regno = 0; regno < NUM_REGS; regno++)
	    {
	      char buf[MAX_REGISTER_RAW_SIZE];

	      val = lseek (corechan, register_addr (regno, reg_offset), 0);
	      if (val < 0)
		perror_with_name (filename);

 	      val = myread (corechan, buf, sizeof buf);
	      if (val < 0)
		perror_with_name (filename);
	      supply_register (regno, buf);
	    }
	}
      }
      if (filename[0] == '/')
	corefile = savestring (filename, strlen (filename));
      else
	{
	  corefile = concat (current_directory, "/", filename, NULL);
	}
      init_tdesc();
      current_context = init_dcontext();
      set_current_frame ( create_new_frame(get_frame_base (read_pc()), 
					    read_pc ()));
      select_frame (get_current_frame (), 0);
      validate_files ();
    }
  else if (from_tty)
    printf ("No core file now.\n");
}
#endif
\f
/* 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
7d9884b9 JG	1	/* Host-dependent Motorola 88xxx support for GDB, the GNU Debugger.
7d9884b9 JG	2	Copyright 1988, 1990, 1991 Free Software Foundation, Inc.
8aa13b87 JK	3
	4	This file is part of GDB.
	5
99a7de40	6	This program is free software; you can redistribute it and/or modify
8aa13b87	7	it under the terms of the GNU General Public License as published by
99a7de40 JG	8	the Free Software Foundation; either version 2 of the License, or
99a7de40 JG	9	(at your option) any later version.
8aa13b87	10
99a7de40	11	This program is distributed in the hope that it will be useful,
8aa13b87 JK	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
99a7de40 JG	17	along with this program; if not, write to the Free Software
99a7de40 JG	18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
8aa13b87	19
8aa13b87	20	#include "defs.h"
8aa13b87 JK	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>
8aa13b87	33
12f2fd9f	34	#ifndef USER /* added to support BCS ptrace_user */
8aa13b87 JK	35	#define USER ptrace_user
	36	#endif
	37	#include <sys/ioctl.h>
	38	#include <fcntl.h>
8aa13b87 JK	39	#include <sys/file.h>
	40	#include <sys/stat.h>
	41
	42	#include "symtab.h"
	43	#include "setjmp.h"
	44	#include "value.h"
	45
12f2fd9f SC	46	#ifdef DELTA88
12f2fd9f SC	47	#include <sys/ptrace.h>
8aa13b87	48
12f2fd9f SC	49	/* define offsets to the pc instruction offsets in ptrace_user struct */
	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
	53	#else
	54	/* define offsets to the pc instruction offsets in ptrace_user struct */
	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
8aa13b87	57	#define SFIP_OFFSET (char )&u.pt_sigframe.dg_sigframe.sc_sfip - (char )&u
12f2fd9f SC	58	#endif
12f2fd9f SC	59
8aa13b87 JK	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	\f
	67	void
1ab3bf1b JG	68	fetch_inferior_registers (regno)
1ab3bf1b JG	69	int regno; /* Original value discarded */
8aa13b87	70	{
8aa13b87 JK	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, 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, regaddr, 0);
	90	regaddr += sizeof (int);
	91	}
	92	supply_register (regno, buf);
	93	}
	94	/* now load up registers 36 - 38; special pc registers */
12f2fd9f	95	(int ) &buf[0] = ptrace (3,inferior_pid,SXIP_OFFSET ,0);
8aa13b87	96	supply_register (SXIP_REGNUM, buf);
12f2fd9f	97	(int ) &buf[0] = ptrace (3, inferior_pid,SNIP_OFFSET,0);
8aa13b87	98	supply_register (SNIP_REGNUM, buf);
12f2fd9f	99	(int ) &buf[0] = ptrace (3, inferior_pid,SFIP_OFFSET,0);
8aa13b87 JK	100	supply_register (SFIP_REGNUM, buf);
	101	}
	102
	103	/* Store our register values back into the inferior.
	104	If REGNO is -1, do this for all registers.
	105	Otherwise, REGNO specifies which register (so we can save time). */
	106
1ab3bf1b	107	void
8aa13b87 JK	108	store_inferior_registers (regno)
	109	int regno;
	110	{
	111	register unsigned int regaddr;
	112	char buf[80];
	113
	114	struct USER u;
	115
8aa13b87 JK	116
	117	unsigned int offset = (char ) &u.pt_r0 - (char ) &u;
	118
8aa13b87 JK	119	regaddr = offset;
	120
	121	if (regno >= 0)
	122	{
	123	/* regaddr = register_addr (regno, offset); */
	124	if (regno < PC_REGNUM)
	125	{
	126	regaddr = offset + regno * sizeof (int);
	127	errno = 0;
	128	ptrace (6, inferior_pid, regaddr, read_register (regno));
	129	if (errno != 0)
	130	{
	131	sprintf (buf, "writing register number %d", regno);
	132	perror_with_name (buf);
	133	}
	134	}
	135	else if (regno == SXIP_REGNUM)
	136	ptrace (6, inferior_pid, SXIP_OFFSET, read_register(regno));
	137	else if (regno == SNIP_REGNUM)
	138	ptrace (6, inferior_pid, SNIP_OFFSET, read_register(regno));
	139	else if (regno == SFIP_REGNUM)
	140	ptrace (6, inferior_pid, SFIP_OFFSET, read_register(regno));
	141	else printf ("Bad register number for store_inferior routine\n");
	142	}
	143	else {
	144	for (regno = 0; regno < NUM_REGS - 3; regno++)
	145	{
	146	/* regaddr = register_addr (regno, offset); */
	147	errno = 0;
	148	regaddr = offset + regno * sizeof (int);
	149	ptrace (6, inferior_pid, regaddr, read_register (regno));
	150	if (errno != 0)
	151	{
	152	sprintf (buf, "writing register number %d", regno);
	153	perror_with_name (buf);
	154	}
	155	}
	156	ptrace (6,inferior_pid,SXIP_OFFSET,read_register(SXIP_REGNUM));
	157	ptrace (6,inferior_pid,SNIP_OFFSET,read_register(SNIP_REGNUM));
	158	ptrace (6,inferior_pid,SFIP_OFFSET,read_register(SFIP_REGNUM));
	159	}
	160
	161
	162	}
	163
	164	#if 0
	165	/* Core files are now a function of BFD. */
	166	\f
	167	void
	168	core_file_command (filename, from_tty)
	169	char *filename;
	170	int from_tty;
	171	{
	172	int val;
	173	extern char registers[];
	174
	175	/* Need symbol file and one with tdesc info for corefiles to work */
	176	if (!have_symbol_file_p())
	177	error ("Requires symbol-file and exec-file");
	178	if (!execfile)
	179	error ("Requires exec-file and symbol-file");
	180
	181	/* Discard all vestiges of any previous core file
	182	and mark data and stack spaces as empty. */
183
184	if (corefile)
185	free (corefile);
186	corefile = 0;
187
188	if (corechan >= 0)
189	close (corechan);
190	corechan = -1;
191
192	data_start = 0;
193	data_end = 0;
194	stack_start = STACK_END_ADDR;
195	stack_end = STACK_END_ADDR;
196
197	/* Now, if a new core file was specified, open it and digest it. */
198
199	if (filename)
200	{
201	filename = tilde_expand (filename);
202	make_cleanup (free, filename);
203
204	if (have_inferior_p ())
205	error ("To look at a core file, you must kill the inferior with \"kill\".");
206	corechan = open (filename, O_RDONLY, 0);
207	if (corechan < 0)
208	perror_with_name (filename);
209	/* 4.2-style (and perhaps also sysV-style) core dump file. */
210	{
211	struct USER u;
212
213	int reg_offset;
214
215	val = myread (corechan, &u, sizeof u);
216	if (val < 0)
217	perror_with_name (filename);
218	data_start = u.pt_o_data_start;
219
220	data_end = data_start + u.pt_dsize;
221	stack_start = stack_end - u.pt_ssize;
222	data_offset = u.pt_dataptr;
223	stack_offset = data_offset + u.pt_dsize;
224
225	#if defined(BCS)
226	#if defined(DGUX)
227
228	reg_offset = 2048;
229
230
231	#endif /* defined (DGUX) */
232	#else
233
234	/* original code: */
235	reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR;
236
237	#endif /* defined(BCS) */
238
239	/* I don't know where to find this info.
240	So, for now, mark it as not available. */
241	/* N_SET_MAGIC (core_aouthdr, 0); */
242	bzero ((char *) &core_aouthdr, sizeof core_aouthdr);
243
244	/* Read the register values out of the core file and store
245	them where `read_register' will find them. */
246
247	{
248	register int regno;
249
250	for (regno = 0; regno < NUM_REGS; regno++)
251	{
252	char buf[MAX_REGISTER_RAW_SIZE];
253
254	val = lseek (corechan, register_addr (regno, reg_offset), 0);
255	if (val < 0)
256	perror_with_name (filename);
257
258	val = myread (corechan, buf, sizeof buf);
259	if (val < 0)
260	perror_with_name (filename);
261	supply_register (regno, buf);
262	}
263	}
264	}
265	if (filename[0] == '/')
266	corefile = savestring (filename, strlen (filename));
267	else
268	{
58ae87f6	269	corefile = concat (current_directory, "/", filename, NULL);
8aa13b87 JK	270	}
	271	init_tdesc();
	272	current_context = init_dcontext();
	273	set_current_frame ( create_new_frame(get_frame_base (read_pc()),
	274	read_pc ()));
	275	select_frame (get_current_frame (), 0);
	276	validate_files ();
	277	}
	278	else if (from_tty)
	279	printf ("No core file now.\n");
	280	}
	281	#endif
	282	\f
	283	/* blockend is the address of the end of the user structure */
	284	m88k_register_u_addr (blockend, regnum)
	285	{
	286	struct USER u;
	287	int ustart = blockend - sizeof (struct USER);
	288	switch (regnum)
	289	{
	290	case 0:
	291	case 1:
	292	case 2:
	293	case 3:
	294	case 4:
	295	case 5:
	296	case 6:
	297	case 7:
	298	case 8:
	299	case 9:
	300	case 10:
	301	case 11:
	302	case 12:
	303	case 13:
	304	case 14:
	305	case 15:
	306	case 16:
	307	case 17:
	308	case 18:
	309	case 19:
	310	case 20:
	311	case 21:
	312	case 22:
	313	case 23:
	314	case 24:
	315	case 25:
	316	case 26:
	317	case 27:
	318	case 28:
	319	case 29:
	320	case 30:
	321	case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
	322	case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
	323	case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
	324	case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
	325	case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
	326	case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
	327	case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
	328	default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
	329	}
	330	}