[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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, 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 "gdb_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;

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

  struct USER u;

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

  regaddr = offset;

  /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
     svr3 doesn't run on an 88110, or the kernel isolates the different (not
     completely sure this is true, but seems to be.  */
  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_unfiltered ("Bad register number for store_inferior routine\n");
    }
  else
    {
      for (regno = 0; regno < PC_REGNUM; 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 (int blockend, int 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) + REGISTER_SIZE * 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:
      if (regnum < NUM_REGS)
	/* The register is one of those which is not defined...
	   give it zero */
	return (ustart + ((int) &u.pt_r0 - (int) &u));
      else
	return (blockend + REGISTER_SIZE * regnum);
    }
}

#ifdef USE_PROC_FS

#include <sys/procfs.h>

/* Prototypes for supply_gregset etc. */
#include "gregset.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 (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 (gregset_t *gregsetp, int regno)
{
  int regi;
  register greg_t *regp = (greg_t *) gregsetp;

  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_FIP) = *(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
c906108c SS	1	/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
	2	Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.
	3
c5aa993b	4	This file is part of GDB.
c906108c	5
c5aa993b JM	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.
c906108c	10
c5aa993b JM	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.
c906108c	15
c5aa993b JM	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., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
c906108c SS	20
	21	#include "defs.h"
	22	#include "frame.h"
	23	#include "inferior.h"
	24
	25	#include <sys/types.h>
	26	#include <sys/param.h>
	27	#include <sys/dir.h>
	28	#include <signal.h>
	29	#include "gdbcore.h"
	30	#include <sys/user.h>
	31
	32	#ifndef USER /* added to support BCS ptrace_user */
	33	#define USER ptrace_user
	34	#endif
	35	#include <sys/ioctl.h>
	36	#include <fcntl.h>
	37	#include <sys/file.h>
	38	#include "gdb_stat.h"
	39
	40	#include "symtab.h"
	41	#include "setjmp.h"
	42	#include "value.h"
	43
	44	#ifdef DELTA88
	45	#include <sys/ptrace.h>
	46
	47	/* define offsets to the pc instruction offsets in ptrace_user struct */
	48	#define SXIP_OFFSET ((char )&u.pt_sigframe.sig_sxip - (char )&u)
	49	#define SNIP_OFFSET ((char )&u.pt_sigframe.sig_snip - (char )&u)
	50	#define SFIP_OFFSET ((char )&u.pt_sigframe.sig_sfip - (char )&u)
	51	#else
	52	/* define offsets to the pc instruction offsets in ptrace_user struct */
	53	#define SXIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sxip - (char )&u)
	54	#define SNIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_snip - (char )&u)
	55	#define SFIP_OFFSET ((char )&u.pt_sigframe.dg_sigframe.sc_sfip - (char )&u)
	56	#endif
	57
c5aa993b	58	extern int have_symbol_file_p ();
c906108c SS	59
	60	extern jmp_buf stack_jmp;
	61
	62	extern int errno;
c906108c SS	63
c906108c SS	64	void
afd64b4e	65	fetch_inferior_registers (int regno)
c906108c SS	66	{
	67	register unsigned int regaddr;
	68	char buf[MAX_REGISTER_RAW_SIZE];
	69	register int i;
	70
	71	struct USER u;
	72	unsigned int offset;
	73
c5aa993b JM	74	offset = (char ) &u.pt_r0 - (char ) &u;
c5aa993b JM	75	regaddr = offset; /* byte offset to r0; */
c906108c SS	76
	77	/* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
	78	for (regno = 0; regno < NUM_REGS; regno++)
	79	{
c5aa993b JM	80	/regaddr = register_addr (regno, offset); /
	81	/* 88k enhancement */
	82
c906108c	83	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
c5aa993b JM	84	{
c5aa993b JM	85	(int ) &buf[i] = ptrace (3, inferior_pid,
c906108c	86	(PTRACE_ARG3_TYPE) regaddr, 0);
c5aa993b JM	87	regaddr += sizeof (int);
c5aa993b JM	88	}
c906108c SS	89	supply_register (regno, buf);
c906108c SS	90	}
c5aa993b JM	91	/* now load up registers 36 - 38; special pc registers */
	92	(int ) &buf[0] = ptrace (3, inferior_pid,
	93	(PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
	94	supply_register (SXIP_REGNUM, buf);
	95	(int ) &buf[0] = ptrace (3, inferior_pid,
	96	(PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
	97	supply_register (SNIP_REGNUM, buf);
	98	(int ) &buf[0] = ptrace (3, inferior_pid,
	99	(PTRACE_ARG3_TYPE) SFIP_OFFSET, 0);
	100	supply_register (SFIP_REGNUM, buf);
c906108c SS	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
	107	void
fba45db2	108	store_inferior_registers (int regno)
c906108c SS	109	{
	110	register unsigned int regaddr;
	111	char buf[80];
	112
	113	struct USER u;
	114
	115	unsigned int offset = (char ) &u.pt_r0 - (char ) &u;
	116
	117	regaddr = offset;
	118
	119	/* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
	120	svr3 doesn't run on an 88110, or the kernel isolates the different (not
	121	completely sure this is true, but seems to be. */
	122	if (regno >= 0)
	123	{
	124	/* regaddr = register_addr (regno, offset); */
	125	if (regno < PC_REGNUM)
c5aa993b	126	{
c906108c SS	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,
c5aa993b	139	(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
c906108c SS	140	else if (regno == SNIP_REGNUM)
c906108c SS	141	ptrace (6, inferior_pid,
c5aa993b	142	(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
c906108c SS	143	else if (regno == SFIP_REGNUM)
c906108c SS	144	ptrace (6, inferior_pid,
c5aa993b	145	(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
c906108c SS	146	else
	147	printf_unfiltered ("Bad register number for store_inferior routine\n");
	148	}
	149	else
c5aa993b	150	{
c906108c SS	151	for (regno = 0; regno < PC_REGNUM; regno++)
	152	{
	153	/* regaddr = register_addr (regno, offset); */
	154	errno = 0;
	155	regaddr = offset + regno * sizeof (int);
	156	ptrace (6, inferior_pid,
	157	(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
	158	if (errno != 0)
	159	{
	160	sprintf (buf, "writing register number %d", regno);
	161	perror_with_name (buf);
	162	}
	163	}
c5aa993b JM	164	ptrace (6, inferior_pid,
	165	(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
	166	ptrace (6, inferior_pid,
	167	(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
	168	ptrace (6, inferior_pid,
	169	(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
c906108c SS	170	}
	171	}
	172
	173
	174	/* blockend is the address of the end of the user structure */
fba45db2	175	m88k_register_u_addr (int blockend, int regnum)
c906108c SS	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:
	213	return (ustart + ((int) &u.pt_r0 - (int) &u) + REGISTER_SIZE * regnum);
c5aa993b JM	214	case PSR_REGNUM:
	215	return (ustart + ((int) &u.pt_psr - (int) &u));
	216	case FPSR_REGNUM:
	217	return (ustart + ((int) &u.pt_fpsr - (int) &u));
	218	case FPCR_REGNUM:
	219	return (ustart + ((int) &u.pt_fpcr - (int) &u));
	220	case SXIP_REGNUM:
	221	return (ustart + SXIP_OFFSET);
	222	case SNIP_REGNUM:
	223	return (ustart + SNIP_OFFSET);
	224	case SFIP_REGNUM:
	225	return (ustart + SFIP_OFFSET);
	226	default:
	227	if (regnum < NUM_REGS)
	228	/* The register is one of those which is not defined...
	229	give it zero */
	230	return (ustart + ((int) &u.pt_r0 - (int) &u));
	231	else
	232	return (blockend + REGISTER_SIZE * regnum);
c906108c SS	233	}
	234	}
	235
	236	#ifdef USE_PROC_FS
	237
	238	#include <sys/procfs.h>
	239
c60c0f5f MS	240	/* Prototypes for supply_gregset etc. */
	241	#include "gregset.h"
	242
c906108c	243	/* Given a pointer to a general register set in /proc format (gregset_t *),
c5aa993b JM	244	unpack the register contents and supply them as gdb's idea of the current
c5aa993b JM	245	register values. */
c906108c SS	246
c906108c SS	247	void
fba45db2	248	supply_gregset (gregset_t *gregsetp)
c906108c	249	{
c5aa993b JM	250	register int regi;
	251	register greg_t regp = (greg_t ) gregsetp;
	252
	253	for (regi = 0; regi <= SP_REGNUM; regi++)
	254	supply_register (regi, (char *) (regp + regi));
	255
	256	supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
	257	supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
	258	supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
	259	supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
	260	supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
	261	supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
c906108c SS	262	}
	263
	264	void
fba45db2	265	fill_gregset (gregset_t *gregsetp, int regno)
c906108c	266	{
c5aa993b JM	267	int regi;
	268	register greg_t regp = (greg_t ) gregsetp;
	269
	270	for (regi = 0; regi <= R_R31; regi++)
	271	if ((regno == -1) \|\| (regno == regi))
	272	(regp + regi) = (int *) &registers[REGISTER_BYTE (regi)];
	273
	274	if ((regno == -1) \|\| (regno == SXIP_REGNUM))
	275	(regp + R_XIP) = (int *) &registers[REGISTER_BYTE (SXIP_REGNUM)];
	276	if ((regno == -1) \|\| (regno == SNIP_REGNUM))
	277	(regp + R_NIP) = (int *) &registers[REGISTER_BYTE (SNIP_REGNUM)];
	278	if ((regno == -1) \|\| (regno == SFIP_REGNUM))
	279	(regp + R_FIP) = (int *) &registers[REGISTER_BYTE (SFIP_REGNUM)];
	280	if ((regno == -1) \|\| (regno == PSR_REGNUM))
	281	(regp + R_PSR) = (int *) &registers[REGISTER_BYTE (PSR_REGNUM)];
	282	if ((regno == -1) \|\| (regno == FPSR_REGNUM))
	283	(regp + R_FPSR) = (int *) &registers[REGISTER_BYTE (FPSR_REGNUM)];
	284	if ((regno == -1) \|\| (regno == FPCR_REGNUM))
	285	(regp + R_FPCR) = (int *) &registers[REGISTER_BYTE (FPCR_REGNUM)];
c906108c SS	286	}
	287
	288	#endif /* USE_PROC_FS */