[binutils.git] / gdb / pyr-xdep.c

/* Low level Pyramid interface to ptrace, for GDB when running under Unix.
   Copyright (C) 1988, 1989, 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 <stdio.h>
#include "defs.h"
#include "param.h"
#include "frame.h"
#include "inferior.h"

#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
/* #include <fcntl.h>  Can we live without this?  */

#include "gdbcore.h"
#include <sys/user.h>		/* After a.out.h  */
#include <sys/file.h>
#include <sys/stat.h>
\f
void
fetch_inferior_registers ()
{
  register int regno, datum;
  register unsigned int regaddr;
  int reg_buf[NUM_REGS+1];
  struct user u;
  register int skipped_frames = 0;

  registers_fetched ();
  
  for (regno = 0; regno < 64; regno++) {
    reg_buf[regno] = ptrace (3, inferior_pid, regno, 0);
    
#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
    printf ("Fetching %s from inferior, got %0x\n",
	    reg_names[regno],
	    reg_buf[regno]);
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
    
    if (reg_buf[regno] == -1 && errno == EIO) {
      printf("fetch_interior_registers: fetching %s from inferior\n",
	     reg_names[regno]);
      errno = 0;
    }
    supply_register (regno, reg_buf+regno);
  }
  /* that leaves regs 64, 65, and 66 */
  datum = ptrace (3, inferior_pid,
		  ((char *)&u.u_pcb.pcb_csp) -
		  ((char *)&u), 0);
  
  
  /* FIXME: Find the Current Frame Pointer (CFP). CFP is a global
     register (ie, NOT windowed), that gets saved in a frame iff
     the code for that frame has a prologue (ie, "adsf N").  If
     there is a prologue, the adsf insn saves the old cfp in
     pr13, cfp is set to sp, and N bytes of locals are allocated
     (sp is decremented by n).
     This makes finding CFP hard. I guess the right way to do it
     is: 
     - If this is the innermost frame, believe ptrace() or
     the core area.
     - Otherwise:
     Find the first insn of the current frame.
     - find the saved pc;
     - find the call insn that saved it;
     - figure out where the call is to;
     - if the first insn is an adsf, we got a frame
     pointer. */
  
  
  /* Normal processors have separate stack pointers for user and
     kernel mode. Getting the last user mode frame on such
     machines is easy: the kernel context of the ptrace()'d
     process is on the kernel stack, and the USP points to what
     we want. But Pyramids only have a single cfp for both user and
     kernel mode.  And processes being ptrace()'d have some
     kernel-context control frames on their stack.
     To avoid tracing back into the kernel context of an inferior,
     we skip 0 or more contiguous control frames where the pc is
     in the kernel. */ 
  
  while (1) {
    register int inferior_saved_pc;
    inferior_saved_pc = ptrace (1, inferior_pid, datum+((32+15)*4), 0);
    if (inferior_saved_pc > 0) break;
#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
    printf("skipping kernel frame %08x, pc=%08x\n", datum,
	   inferior_saved_pc);
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
    skipped_frames++;
    datum -= CONTROL_STACK_FRAME_SIZE;
  }
  
  reg_buf[CSP_REGNUM] = datum;
  supply_register(CSP_REGNUM, reg_buf+CSP_REGNUM);
#ifdef  PYRAMID_CONTROL_FRAME_DEBUGGING
  if (skipped_frames) {
    fprintf (stderr,
	     "skipped %d frames from %x to %x; cfp was %x, now %x\n",
	     skipped_frames, reg_buf[CSP_REGNUM]);
  }
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
}

/* 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).  */

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

  if (regno >= 0)
    {
      if ((0 <= regno) && (regno < 64)) {
	/*regaddr = register_addr (regno, offset);*/
	regaddr = regno;
	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
    {
      for (regno = 0; regno < NUM_REGS; regno++)
	{
	  /*regaddr = register_addr (regno, offset);*/
	  regaddr = regno;
	  errno = 0;
	  ptrace (6, inferior_pid, regaddr, read_register (regno));
	  if (errno != 0)
	    {
	      sprintf (buf, "writing all regs, number %d", regno);
	      perror_with_name (buf);
	    }
	}
}
\f
/*** Extensions to  core and dump files, for GDB. */

extern unsigned int last_frame_offset;

#ifdef PYRAMID_CORE

/* Can't make definitions here static, since core.c needs them
   to do bounds checking on the core-file areas. O well. */

/* have two stacks: one for data, one for register windows. */
extern CORE_ADDR reg_stack_start;
extern CORE_ADDR reg_stack_end;

/* need this so we can find the global registers: they never get saved. */
CORE_ADDR global_reg_offset;
static CORE_ADDR last_frame_address;
CORE_ADDR last_frame_offset;


/* Address in core file of start of register window stack area.
   Don't know if is this any of meaningful, useful or necessary.   */
extern int reg_stack_offset;

#endif /* PYRAMID_CORE */  

\f
/* Work with core dump and executable files, for GDB. 
   This code would be in core.c if it weren't machine-dependent. */

void
core_file_command (filename, from_tty)
     char *filename;
     int from_tty;
{
  int val;
  extern char registers[];

  /* 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;

#ifdef PYRAMID_CORE
  reg_stack_start = CONTROL_STACK_ADDR;
  reg_stack_end = CONTROL_STACK_ADDR;	/* this isn't strictly true...*/
#endif /* PYRAMID_CORE */

  /* 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;

	unsigned int reg_offset;

	val = myread (corechan, &u, sizeof u);
	if (val < 0)
	  perror_with_name ("Not a core file: reading upage");
	if (val != sizeof u)
	  error ("Not a core file: could only read %d bytes", val);
	data_start = exec_data_start;

	data_end = data_start + NBPG * u.u_dsize;
	data_offset = NBPG * UPAGES;
	stack_offset = NBPG * (UPAGES + u.u_dsize);

	/* find registers in core file */
#ifdef PYRAMID_PTRACE
	stack_start = stack_end - NBPG * u.u_ussize;
	reg_stack_offset = stack_offset + (NBPG *u.u_ussize);
	reg_stack_end = reg_stack_start + NBPG * u.u_cssize;

	last_frame_address = ((int) u.u_pcb.pcb_csp);
	last_frame_offset = reg_stack_offset + last_frame_address
		- CONTROL_STACK_ADDR ;
	global_reg_offset = (char *)&u - (char *)&u.u_pcb.pcb_gr0 ;

	/* skip any control-stack frames that were executed in the
	   kernel. */

	while (1) {
	    char buf[4];
	    val = lseek (corechan, last_frame_offset+(47*4), 0);
	    if (val < 0)
		    perror_with_name (filename);
	    val = myread (corechan, buf, sizeof buf);
	    if (val < 0)
		    perror_with_name (filename);

	    if (*(int *)buf >= 0)
		    break;
	    printf ("skipping frame %s\n", local_hex_string (last_frame_address));
	    last_frame_offset -= CONTROL_STACK_FRAME_SIZE;
	    last_frame_address -= CONTROL_STACK_FRAME_SIZE;
	}
	reg_offset = last_frame_offset;

#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
	printf ("Control stack pointer = %s\n",
		local_hex_string (u.u_pcb.pcb_csp));
	printf ("offset to control stack %d outermost frame %d (%s)\n",
	      reg_stack_offset, reg_offset, local_hex_string (last_frame_address));
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */

#else /* not PYRAMID_CORE */
	stack_start = stack_end - NBPG * u.u_ssize;
        reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
#endif /* not PYRAMID_CORE */

#ifdef __not_on_pyr_yet
	/* Some machines put an absolute address in here and some put
	   the offset in the upage of the regs.  */
	reg_offset = (int) u.u_ar0;
	if (reg_offset > NBPG * UPAGES)
	  reg_offset -= KERNEL_U_ADDR;
#endif

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

	/* 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 < 64; regno++)
	    {
	      char buf[MAX_REGISTER_RAW_SIZE];

	      val = lseek (corechan, register_addr (regno, reg_offset), 0);
	      if (val < 0
		  || (val = myread (corechan, buf, sizeof buf)) < 0)
		{
		  char * buffer = (char *) alloca (strlen (reg_names[regno])
						   + 30);
		  strcpy (buffer, "Reading register ");
		  strcat (buffer, reg_names[regno]);
						   
		  perror_with_name (buffer);
		}

	      if (val < 0)
		perror_with_name (filename);
#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
      printf ("[reg %s(%d), offset in file %s=0x%0x, addr =0x%0x, =%0x]\n",
	      reg_names[regno], regno, filename,
	      register_addr(regno, reg_offset),
	      regno * 4 + last_frame_address,
	      *((int *)buf));
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
	      supply_register (regno, buf);
	    }
	}
      }
      if (filename[0] == '/')
	corefile = savestring (filename, strlen (filename));
      else
	{
	  corefile = concat (current_directory, "/", filename, NULL);
	}

#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
      printf ("Providing CSP (%s) as nominal address of current frame.\n",
	      local_hex_string(last_frame_address));
#endif PYRAMID_CONTROL_FRAME_DEBUGGING
      /* FIXME: Which of the following is correct? */
#if 0
      set_current_frame ( create_new_frame (read_register (FP_REGNUM),
					    read_pc ()));
#else
      set_current_frame ( create_new_frame (last_frame_address,
					    read_pc ()));
#endif

      select_frame (get_current_frame (), 0);
      validate_files ();
    }
  else if (from_tty)
    printf ("No core file now.\n");
}
Commit	Line	Data
dd3b648e RP	1	/* Low level Pyramid interface to ptrace, for GDB when running under Unix.
	2	Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
99a7de40	6	This program is free software; you can redistribute it and/or modify
dd3b648e	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.
dd3b648e	10
99a7de40	11	This program is distributed in the hope that it will be useful,
dd3b648e RP	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. */
dd3b648e RP	19
	20	#include <stdio.h>
	21	#include "defs.h"
	22	#include "param.h"
	23	#include "frame.h"
	24	#include "inferior.h"
	25
	26	#include <sys/param.h>
	27	#include <sys/dir.h>
	28	#include <signal.h>
	29	#include <sys/ioctl.h>
	30	/* #include <fcntl.h> Can we live without this? */
	31
	32	#include "gdbcore.h"
	33	#include <sys/user.h> /* After a.out.h */
	34	#include <sys/file.h>
	35	#include <sys/stat.h>
	36	\f
	37	void
	38	fetch_inferior_registers ()
	39	{
	40	register int regno, datum;
	41	register unsigned int regaddr;
	42	int reg_buf[NUM_REGS+1];
	43	struct user u;
	44	register int skipped_frames = 0;
	45
	46	registers_fetched ();
	47
	48	for (regno = 0; regno < 64; regno++) {
	49	reg_buf[regno] = ptrace (3, inferior_pid, regno, 0);
	50
	51	#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
	52	printf ("Fetching %s from inferior, got %0x\n",
	53	reg_names[regno],
	54	reg_buf[regno]);
	55	#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
	56
	57	if (reg_buf[regno] == -1 && errno == EIO) {
	58	printf("fetch_interior_registers: fetching %s from inferior\n",
	59	reg_names[regno]);
	60	errno = 0;
	61	}
	62	supply_register (regno, reg_buf+regno);
	63	}
	64	/* that leaves regs 64, 65, and 66 */
	65	datum = ptrace (3, inferior_pid,
	66	((char *)&u.u_pcb.pcb_csp) -
	67	((char *)&u), 0);
	68
	69
	70
	71	/* FIXME: Find the Current Frame Pointer (CFP). CFP is a global
	72	register (ie, NOT windowed), that gets saved in a frame iff
	73	the code for that frame has a prologue (ie, "adsf N"). If
	74	there is a prologue, the adsf insn saves the old cfp in
	75	pr13, cfp is set to sp, and N bytes of locals are allocated
	76	(sp is decremented by n).
	77	This makes finding CFP hard. I guess the right way to do it
	78	is:
	79	- If this is the innermost frame, believe ptrace() or
	80	the core area.
	81	- Otherwise:
	82	Find the first insn of the current frame.
83	- find the saved pc;
84	- find the call insn that saved it;
85	- figure out where the call is to;
86	- if the first insn is an adsf, we got a frame
87	pointer. */
88
89
90	/* Normal processors have separate stack pointers for user and
91	kernel mode. Getting the last user mode frame on such
92	machines is easy: the kernel context of the ptrace()'d
93	process is on the kernel stack, and the USP points to what
94	we want. But Pyramids only have a single cfp for both user and
95	kernel mode. And processes being ptrace()'d have some
96	kernel-context control frames on their stack.
97	To avoid tracing back into the kernel context of an inferior,
98	we skip 0 or more contiguous control frames where the pc is
99	in the kernel. */
100
101	while (1) {
102	register int inferior_saved_pc;
103	inferior_saved_pc = ptrace (1, inferior_pid, datum+((32+15)*4), 0);
104	if (inferior_saved_pc > 0) break;
105	#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
106	printf("skipping kernel frame %08x, pc=%08x\n", datum,
107	inferior_saved_pc);
108	#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
109	skipped_frames++;
110	datum -= CONTROL_STACK_FRAME_SIZE;
111	}
112
113	reg_buf[CSP_REGNUM] = datum;
114	supply_register(CSP_REGNUM, reg_buf+CSP_REGNUM);
115	#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
116	if (skipped_frames) {
117	fprintf (stderr,
118	"skipped %d frames from %x to %x; cfp was %x, now %x\n",
119	skipped_frames, reg_buf[CSP_REGNUM]);
120	}
121	#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
122	}
123
124	/* Store our register values back into the inferior.
125	If REGNO is -1, do this for all registers.
126	Otherwise, REGNO specifies which register (so we can save time). */
127
128	store_inferior_registers (regno)
129	int regno;
130	{
131	register unsigned int regaddr;
132	char buf[80];
133
134	if (regno >= 0)
135	{
136	if ((0 <= regno) && (regno < 64)) {
137	/regaddr = register_addr (regno, offset);/
138	regaddr = regno;
139	errno = 0;
140	ptrace (6, inferior_pid, regaddr, read_register (regno));
141	if (errno != 0)
142	{
143	sprintf (buf, "writing register number %d", regno);
144	perror_with_name (buf);
145	}
146	}
147	}
148	else
149	{
150	for (regno = 0; regno < NUM_REGS; regno++)
151	{
152	/regaddr = register_addr (regno, offset);/
153	regaddr = regno;
154	errno = 0;
155	ptrace (6, inferior_pid, regaddr, read_register (regno));
156	if (errno != 0)
157	{
158	sprintf (buf, "writing all regs, number %d", regno);
159	perror_with_name (buf);
160	}
161	}
162	}
163	\f
164	/*** Extensions to core and dump files, for GDB. */
165
166	extern unsigned int last_frame_offset;
167
168	#ifdef PYRAMID_CORE
169
170	/* Can't make definitions here static, since core.c needs them
171	to do bounds checking on the core-file areas. O well. */
172
173	/* have two stacks: one for data, one for register windows. */
174	extern CORE_ADDR reg_stack_start;
175	extern CORE_ADDR reg_stack_end;
176
177	/* need this so we can find the global registers: they never get saved. */
178	CORE_ADDR global_reg_offset;
179	static CORE_ADDR last_frame_address;
180	CORE_ADDR last_frame_offset;
181
182
183	/* Address in core file of start of register window stack area.
184	Don't know if is this any of meaningful, useful or necessary. */
185	extern int reg_stack_offset;
186
187	#endif /* PYRAMID_CORE */
188
189	\f
190	/* Work with core dump and executable files, for GDB.
191	This code would be in core.c if it weren't machine-dependent. */
192
193	void
194	core_file_command (filename, from_tty)
195	char *filename;
196	int from_tty;
197	{
198	int val;
199	extern char registers[];
200
201	/* Discard all vestiges of any previous core file
202	and mark data and stack spaces as empty. */
203
204	if (corefile)
205	free (corefile);
206	corefile = 0;
207
208	if (corechan >= 0)
209	close (corechan);
210	corechan = -1;
211
212	data_start = 0;
213	data_end = 0;
214	stack_start = STACK_END_ADDR;
215	stack_end = STACK_END_ADDR;
216
217	#ifdef PYRAMID_CORE
218	reg_stack_start = CONTROL_STACK_ADDR;
219	reg_stack_end = CONTROL_STACK_ADDR; /* this isn't strictly true...*/
220	#endif /* PYRAMID_CORE */
221
222	/* Now, if a new core file was specified, open it and digest it. */
223
224	if (filename)
225	{
226	filename = tilde_expand (filename);
227	make_cleanup (free, filename);
228
229	if (have_inferior_p ())
230	error ("To look at a core file, you must kill the inferior with \"kill\".");
231	corechan = open (filename, O_RDONLY, 0);
232	if (corechan < 0)
233	perror_with_name (filename);
234	/* 4.2-style (and perhaps also sysV-style) core dump file. */
235	{
236	struct user u;
237
238	unsigned int reg_offset;
239
240	val = myread (corechan, &u, sizeof u);
241	if (val < 0)
242	perror_with_name ("Not a core file: reading upage");
243	if (val != sizeof u)
244	error ("Not a core file: could only read %d bytes", val);
245	data_start = exec_data_start;
246
247	data_end = data_start + NBPG * u.u_dsize;
248	data_offset = NBPG * UPAGES;
249	stack_offset = NBPG * (UPAGES + u.u_dsize);
250
251	/* find registers in core file */
252	#ifdef PYRAMID_PTRACE
253	stack_start = stack_end - NBPG * u.u_ussize;
254	reg_stack_offset = stack_offset + (NBPG *u.u_ussize);
255	reg_stack_end = reg_stack_start + NBPG * u.u_cssize;
256
257	last_frame_address = ((int) u.u_pcb.pcb_csp);
258	last_frame_offset = reg_stack_offset + last_frame_address
259	- CONTROL_STACK_ADDR ;
260	global_reg_offset = (char )&u - (char )&u.u_pcb.pcb_gr0 ;
261
262	/* skip any control-stack frames that were executed in the
263	kernel. */
264
265	while (1) {
266	char buf[4];
267	val = lseek (corechan, last_frame_offset+(47*4), 0);
268	if (val < 0)
269	perror_with_name (filename);
270	val = myread (corechan, buf, sizeof buf);
271	if (val < 0)
272	perror_with_name (filename);
273
274	if ((int )buf >= 0)
275	break;
e3af0493	276	printf ("skipping frame %s\n", local_hex_string (last_frame_address));
dd3b648e RP	277	last_frame_offset -= CONTROL_STACK_FRAME_SIZE;
	278	last_frame_address -= CONTROL_STACK_FRAME_SIZE;
	279	}
	280	reg_offset = last_frame_offset;
	281
	282	#if 1 \|\| defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
e3af0493 JG	283	printf ("Control stack pointer = %s\n",
	284	local_hex_string (u.u_pcb.pcb_csp));
	285	printf ("offset to control stack %d outermost frame %d (%s)\n",
	286	reg_stack_offset, reg_offset, local_hex_string (last_frame_address));
dd3b648e RP	287	#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
	288
	289	#else /* not PYRAMID_CORE */
	290	stack_start = stack_end - NBPG * u.u_ssize;
	291	reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
	292	#endif /* not PYRAMID_CORE */
	293
	294	#ifdef __not_on_pyr_yet
	295	/* Some machines put an absolute address in here and some put
	296	the offset in the upage of the regs. */
	297	reg_offset = (int) u.u_ar0;
	298	if (reg_offset > NBPG * UPAGES)
	299	reg_offset -= KERNEL_U_ADDR;
	300	#endif
	301
	302	/* I don't know where to find this info.
	303	So, for now, mark it as not available. */
	304	N_SET_MAGIC (core_aouthdr, 0);
	305
	306	/* Read the register values out of the core file and store
	307	them where `read_register' will find them. */
	308
	309	{
	310	register int regno;
	311
	312	for (regno = 0; regno < 64; regno++)
	313	{
	314	char buf[MAX_REGISTER_RAW_SIZE];
	315
	316	val = lseek (corechan, register_addr (regno, reg_offset), 0);
	317	if (val < 0
	318	\|\| (val = myread (corechan, buf, sizeof buf)) < 0)
	319	{
	320	char * buffer = (char *) alloca (strlen (reg_names[regno])
	321	+ 30);
	322	strcpy (buffer, "Reading register ");
	323	strcat (buffer, reg_names[regno]);
	324
	325	perror_with_name (buffer);
	326	}
	327
	328	if (val < 0)
	329	perror_with_name (filename);
	330	#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
	331	printf ("[reg %s(%d), offset in file %s=0x%0x, addr =0x%0x, =%0x]\n",
	332	reg_names[regno], regno, filename,
	333	register_addr(regno, reg_offset),
	334	regno * 4 + last_frame_address,
	335	((int )buf));
	336	#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
	337	supply_register (regno, buf);
	338	}
	339	}
	340	}
	341	if (filename[0] == '/')
	342	corefile = savestring (filename, strlen (filename));
	343	else
	344	{
58ae87f6	345	corefile = concat (current_directory, "/", filename, NULL);
dd3b648e RP	346	}
	347
	348	#if 1 \|\| defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
e3af0493 JG	349	printf ("Providing CSP (%s) as nominal address of current frame.\n",
e3af0493 JG	350	local_hex_string(last_frame_address));
dd3b648e RP	351	#endif PYRAMID_CONTROL_FRAME_DEBUGGING
	352	/* FIXME: Which of the following is correct? */
	353	#if 0
	354	set_current_frame ( create_new_frame (read_register (FP_REGNUM),
	355	read_pc ()));
	356	#else
	357	set_current_frame ( create_new_frame (last_frame_address,
	358	read_pc ()));
	359	#endif
	360
	361	select_frame (get_current_frame (), 0);
	362	validate_files ();
	363	}
	364	else if (from_tty)
	365	printf ("No core file now.\n");
	366	}