[binutils.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"

#include <sys/types.h>
#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);
    }
}

#ifdef USE_PROC_FS

#include <sys/procfs.h>

/*  Given a pointer to a general register set in /proc format (gregset_t *),
    unpack the register contents and supply them as gdb's idea of the current
    register values. */

void
supply_gregset (gregsetp)
     gregset_t *gregsetp;
{
    register int regi;
    register greg_t *regp = (greg_t *) gregsetp;

    for (regi=0; regi <= SP_REGNUM; regi++)
	supply_register (regi, (char *) (regp + regi));

    supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
    supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
    supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
    supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
    supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
    supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
}

void
fill_gregset (gregsetp, regno)
     gregset_t *gregsetp;
     int regno;
{
    int regi;
    register greg_t *regp = (greg_t *) gregsetp;
    extern char registers[];

    for (regi = 0 ; regi <= R_R31 ; regi++)
	if ((regno == -1) || (regno == regi))
	    *(regp + regi) = *(int *) &registers[REGISTER_BYTE(regi)];

    if ((regno == -1) || (regno == SXIP_REGNUM))
	*(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
    if ((regno == -1) || (regno == SNIP_REGNUM))
	*(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
    if ((regno == -1) || (regno == SFIP_REGNUM))
	*(regp + R_SFIP) = *(int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
    if ((regno == -1) || (regno == PSR_REGNUM))
	*(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
    if ((regno == -1) || (regno == FPSR_REGNUM))
	*(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
    if ((regno == -1) || (regno == FPCR_REGNUM))
	*(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
}

#endif /* USE_PROC_FS */
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
173a4f1b	24	#include <sys/types.h>
173a4f1b RP	25	#include <sys/param.h>
	26	#include <sys/dir.h>
	27	#include <signal.h>
	28	#include "gdbcore.h"
	29	#include <sys/user.h>
	30
	31	#ifndef USER /* added to support BCS ptrace_user */
	32	#define USER ptrace_user
	33	#endif
	34	#include <sys/ioctl.h>
	35	#include <fcntl.h>
	36	#include <sys/file.h>
	37	#include <sys/stat.h>
	38
	39	#include "symtab.h"
	40	#include "setjmp.h"
	41	#include "value.h"
	42
	43	#ifdef DELTA88
fc61e9ee	44	#include <sys/ptrace.h>
173a4f1b RP	45
173a4f1b RP	46	/* define offsets to the pc instruction offsets in ptrace_user struct */
e5bb7e61 FF	47	#define SXIP_OFFSET ((char )&u.pt_sigframe.sig_sxip - (char )&u)
	48	#define SNIP_OFFSET ((char )&u.pt_sigframe.sig_snip - (char )&u)
	49	#define SFIP_OFFSET ((char )&u.pt_sigframe.sig_sfip - (char )&u)
173a4f1b RP	50	#else
173a4f1b RP	51	/* define offsets to the pc instruction offsets in ptrace_user struct */
e5bb7e61 FF	52	#define SXIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sxip - (char )&u)
	53	#define SNIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_snip - (char )&u)
	54	#define SFIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sfip - (char )&u)
173a4f1b RP	55	#endif
	56
	57	extern int have_symbol_file_p();
	58
	59	extern jmp_buf stack_jmp;
	60
	61	extern int errno;
	62	extern char registers[REGISTER_BYTES];
	63
	64	void
	65	fetch_inferior_registers (regno)
	66	int regno; /* Original value discarded */
	67	{
	68	register unsigned int regaddr;
	69	char buf[MAX_REGISTER_RAW_SIZE];
	70	register int i;
	71
	72	struct USER u;
	73	unsigned int offset;
	74
	75	offset = (char ) &u.pt_r0 - (char ) &u;
	76	regaddr = offset; /* byte offset to r0;*/
	77
	78	/* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
	79	for (regno = 0; regno < NUM_REGS; regno++)
	80	{
	81	/regaddr = register_addr (regno, offset);/
	82	/* 88k enhancement */
	83
	84	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
	85	{
	86	(int ) &buf[i] = ptrace (3, inferior_pid,
	87	(PTRACE_ARG3_TYPE) regaddr, 0);
	88	regaddr += sizeof (int);
	89	}
	90	supply_register (regno, buf);
	91	}
	92	/* now load up registers 36 - 38; special pc registers */
	93	(int ) &buf[0] = ptrace (3,inferior_pid,
	94	(PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
	95	supply_register (SXIP_REGNUM, buf);
	96	(int ) &buf[0] = ptrace (3, inferior_pid,
	97	(PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
	98	supply_register (SNIP_REGNUM, buf);
	99	(int ) &buf[0] = ptrace (3, inferior_pid,
	100	(PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
	101	supply_register (SFIP_REGNUM, buf);
	102	}
	103
	104	/* Store our register values back into the inferior.
	105	If REGNO is -1, do this for all registers.
	106	Otherwise, REGNO specifies which register (so we can save time). */
	107
	108	void
	109	store_inferior_registers (regno)
	110	int regno;
	111	{
	112	register unsigned int regaddr;
	113	char buf[80];
	114
	115	struct USER u;
	116
	117
	118	unsigned int offset = (char ) &u.pt_r0 - (char ) &u;
119
120	regaddr = offset;
121
122	if (regno >= 0)
123	{
124	/* regaddr = register_addr (regno, offset); */
125	if (regno < PC_REGNUM)
126	{
127	regaddr = offset + regno * sizeof (int);
128	errno = 0;
129	ptrace (6, inferior_pid,
130	(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
131	if (errno != 0)
132	{
133	sprintf (buf, "writing register number %d", regno);
134	perror_with_name (buf);
135	}
136	}
137	else if (regno == SXIP_REGNUM)
138	ptrace (6, inferior_pid,
139	(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
140	else if (regno == SNIP_REGNUM)
141	ptrace (6, inferior_pid,
142	(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
143	else if (regno == SFIP_REGNUM)
144	ptrace (6, inferior_pid,
145	(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
146	else printf ("Bad register number for store_inferior routine\n");
147	}
148	else {
149	for (regno = 0; regno < NUM_REGS - 3; regno++)
150	{
151	/* regaddr = register_addr (regno, offset); */
152	errno = 0;
153	regaddr = offset + regno * sizeof (int);
154	ptrace (6, inferior_pid,
155	(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
156	if (errno != 0)
157	{
158	sprintf (buf, "writing register number %d", regno);
159	perror_with_name (buf);
160	}
161	}
162	ptrace (6,inferior_pid,
163	(PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
164	ptrace (6,inferior_pid,
165	(PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
166	ptrace (6,inferior_pid,
167	(PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
168	}
169
170
171	}
172
173
174	/* blockend is the address of the end of the user structure */
175	m88k_register_u_addr (blockend, regnum)
176	{
177	struct USER u;
178	int ustart = blockend - sizeof (struct USER);
179	switch (regnum)
180	{
181	case 0:
182	case 1:
183	case 2:
184	case 3:
185	case 4:
186	case 5:
187	case 6:
188	case 7:
189	case 8:
190	case 9:
191	case 10:
192	case 11:
193	case 12:
194	case 13:
195	case 14:
196	case 15:
197	case 16:
198	case 17:
199	case 18:
200	case 19:
201	case 20:
202	case 21:
203	case 22:
204	case 23:
205	case 24:
206	case 25:
207	case 26:
208	case 27:
209	case 28:
210	case 29:
211	case 30:
212	case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
213	case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
214	case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
215	case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
216	case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
217	case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
218	case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
219	default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
220	}
221	}
222
304977ab JK	223	#ifdef USE_PROC_FS
	224
	225	#include <sys/procfs.h>
	226
	227	/* Given a pointer to a general register set in /proc format (gregset_t *),
	228	unpack the register contents and supply them as gdb's idea of the current
	229	register values. */
	230
	231	void
	232	supply_gregset (gregsetp)
	233	gregset_t *gregsetp;
	234	{
	235	register int regi;
	236	register greg_t regp = (greg_t ) gregsetp;
	237
	238	for (regi=0; regi <= SP_REGNUM; regi++)
	239	supply_register (regi, (char *) (regp + regi));
	240
	241	supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
	242	supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
	243	supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
	244	supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
	245	supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
	246	supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
	247	}
	248
	249	void
	250	fill_gregset (gregsetp, regno)
	251	gregset_t *gregsetp;
	252	int regno;
	253	{
	254	int regi;
	255	register greg_t regp = (greg_t ) gregsetp;
	256	extern char registers[];
	257
00dff753	258	for (regi = 0 ; regi <= R_R31 ; regi++)
304977ab JK	259	if ((regno == -1) \|\| (regno == regi))
	260	(regp + regi) = (int *) &registers[REGISTER_BYTE(regi)];
	261
	262	if ((regno == -1) \|\| (regno == SXIP_REGNUM))
	263	(regp + R_XIP) = (int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
	264	if ((regno == -1) \|\| (regno == SNIP_REGNUM))
	265	(regp + R_NIP) = (int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
	266	if ((regno == -1) \|\| (regno == SFIP_REGNUM))
00dff753	267	(regp + R_SFIP) = (int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
304977ab JK	268	if ((regno == -1) \|\| (regno == PSR_REGNUM))
	269	(regp + R_PSR) = (int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
	270	if ((regno == -1) \|\| (regno == FPSR_REGNUM))
	271	(regp + R_FPSR) = (int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
	272	if ((regno == -1) \|\| (regno == FPCR_REGNUM))
	273	(regp + R_FPCR) = (int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
	274	}
	275
	276	#endif /* USE_PROC_FS */