[deliverable/binutils-gdb.git] / gdb / ns32knbsd-nat.c

/* Functions specific to running gdb native on an ns32k running NetBSD
   Copyright 1989, 1992, 1993, 1994, 1996 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 <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include <machine/frame.h>
#include <machine/pcb.h>

#include "defs.h"
#include "inferior.h"
#include "target.h"
#include "gdbcore.h"

#define RF(dst, src) \
	memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))

#define RS(src, dst) \
	memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))

void
fetch_inferior_registers (int regno)
{
  struct reg inferior_registers;
  struct fpreg inferior_fpregisters;

  ptrace (PT_GETREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  ptrace (PT_GETFPREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);

  RF (R0_REGNUM + 0, inferior_registers.r_r0);
  RF (R0_REGNUM + 1, inferior_registers.r_r1);
  RF (R0_REGNUM + 2, inferior_registers.r_r2);
  RF (R0_REGNUM + 3, inferior_registers.r_r3);
  RF (R0_REGNUM + 4, inferior_registers.r_r4);
  RF (R0_REGNUM + 5, inferior_registers.r_r5);
  RF (R0_REGNUM + 6, inferior_registers.r_r6);
  RF (R0_REGNUM + 7, inferior_registers.r_r7);

  RF (SP_REGNUM, inferior_registers.r_sp);
  RF (FP_REGNUM, inferior_registers.r_fp);
  RF (PC_REGNUM, inferior_registers.r_pc);
  RF (PS_REGNUM, inferior_registers.r_psr);

  RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
  RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
  RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
  RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
  RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
  RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
  RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
  RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
  RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
  registers_fetched ();
}

void
store_inferior_registers (int regno)
{
  struct reg inferior_registers;
  struct fpreg inferior_fpregisters;

  RS (R0_REGNUM + 0, inferior_registers.r_r0);
  RS (R0_REGNUM + 1, inferior_registers.r_r1);
  RS (R0_REGNUM + 2, inferior_registers.r_r2);
  RS (R0_REGNUM + 3, inferior_registers.r_r3);
  RS (R0_REGNUM + 4, inferior_registers.r_r4);
  RS (R0_REGNUM + 5, inferior_registers.r_r5);
  RS (R0_REGNUM + 6, inferior_registers.r_r6);
  RS (R0_REGNUM + 7, inferior_registers.r_r7);

  RS (SP_REGNUM, inferior_registers.r_sp);
  RS (FP_REGNUM, inferior_registers.r_fp);
  RS (PC_REGNUM, inferior_registers.r_pc);
  RS (PS_REGNUM, inferior_registers.r_psr);

  RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
  RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
  RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
  RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
  RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
  RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
  RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
  RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
  RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);

  ptrace (PT_SETREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_registers, 0);
  ptrace (PT_SETFPREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
}
\f

/* XXX - Add this to machine/regs.h instead? */
struct coreregs
{
  struct reg intreg;
  struct fpreg freg;
};

/* Get registers from a core file. */
static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
     char *core_reg_sect;
     unsigned core_reg_size;
     int which;
     unsigned int reg_addr;	/* Unused in this version */
{
  struct coreregs *core_reg;

  core_reg = (struct coreregs *) core_reg_sect;

  /*
   * We have *all* registers
   * in the first core section.
   * Ignore which.
   */

  if (core_reg_size < sizeof (*core_reg))
    {
      fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
      return;
    }

  /* Integer registers */
  RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
  RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
  RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
  RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
  RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
  RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
  RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
  RF (R0_REGNUM + 7, core_reg->intreg.r_r7);

  RF (SP_REGNUM, core_reg->intreg.r_sp);
  RF (FP_REGNUM, core_reg->intreg.r_fp);
  RF (PC_REGNUM, core_reg->intreg.r_pc);
  RF (PS_REGNUM, core_reg->intreg.r_psr);

  /* Floating point registers */
  RF (FPS_REGNUM, core_reg->freg.r_fsr);
  RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
  RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
  RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
  RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
  RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
  RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
  RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
  RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
  registers_fetched ();
}

/* Register that we are able to handle ns32knbsd core file formats.
   FIXME: is this really bfd_target_unknown_flavour? */

static struct core_fns nat_core_fns =
{
  bfd_target_unknown_flavour,		/* core_flavour */
  default_check_format,			/* check_format */
  default_core_sniffer,			/* core_sniffer */
  fetch_core_registers,			/* core_read_registers */
  NULL					/* next */
};

void
_initialize_ns32knbsd_nat (void)
{
  add_core_fns (&nat_core_fns);
}
\f

/*
 * kernel_u_size() is not helpful on NetBSD because
 * the "u" struct is NOT in the core dump file.
 */

#ifdef	FETCH_KCORE_REGISTERS
/*
 * Get registers from a kernel crash dump or live kernel.
 * Called by kcore-nbsd.c:get_kcore_registers().
 */
void
fetch_kcore_registers (struct pcb *pcb)
{
  struct switchframe sf;
  struct reg intreg;
  int dummy;

  /* Integer registers */
  if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
    error ("Cannot read integer registers.");

  /* We use the psr at kernel entry */
  if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
    error ("Cannot read processor status register.");

  dummy = 0;
  RF (R0_REGNUM + 0, dummy);
  RF (R0_REGNUM + 1, dummy);
  RF (R0_REGNUM + 2, dummy);
  RF (R0_REGNUM + 3, sf.sf_r3);
  RF (R0_REGNUM + 4, sf.sf_r4);
  RF (R0_REGNUM + 5, sf.sf_r5);
  RF (R0_REGNUM + 6, sf.sf_r6);
  RF (R0_REGNUM + 7, sf.sf_r7);

  dummy = pcb->pcb_kfp + 8;
  RF (SP_REGNUM, dummy);
  RF (FP_REGNUM, sf.sf_fp);
  RF (PC_REGNUM, sf.sf_pc);
  RF (PS_REGNUM, intreg.r_psr);

  /* Floating point registers */
  RF (FPS_REGNUM, pcb->pcb_fsr);
  RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
  RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
  RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
  RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
  RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
  RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
  RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
  RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
  registers_fetched ();
}
#endif /* FETCH_KCORE_REGISTERS */

void
clear_regs (void)
{
  double zero = 0.0;
  int null = 0;

  /* Integer registers */
  RF (R0_REGNUM + 0, null);
  RF (R0_REGNUM + 1, null);
  RF (R0_REGNUM + 2, null);
  RF (R0_REGNUM + 3, null);
  RF (R0_REGNUM + 4, null);
  RF (R0_REGNUM + 5, null);
  RF (R0_REGNUM + 6, null);
  RF (R0_REGNUM + 7, null);

  RF (SP_REGNUM, null);
  RF (FP_REGNUM, null);
  RF (PC_REGNUM, null);
  RF (PS_REGNUM, null);

  /* Floating point registers */
  RF (FPS_REGNUM, zero);
  RF (FP0_REGNUM + 0, zero);
  RF (FP0_REGNUM + 2, zero);
  RF (FP0_REGNUM + 4, zero);
  RF (FP0_REGNUM + 6, zero);
  RF (LP0_REGNUM + 0, zero);
  RF (LP0_REGNUM + 1, zero);
  RF (LP0_REGNUM + 2, zero);
  RF (LP0_REGNUM + 3, zero);
  return;
}

/* Return number of args passed to a frame.
   Can return -1, meaning no way to tell. */

int
frame_num_args (struct frame_info *fi)
{
  CORE_ADDR enter_addr;
  CORE_ADDR argp;
  int inst;
  int args;
  int i;

  if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
    {
      /* main is always called with three args */
      return (3);
    }
  enter_addr = ns32k_get_enter_addr (fi->pc);
  if (enter_addr = 0)
    return (-1);
  argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
  for (i = 0; i < 16; i++)
    {
      /*
       * After a bsr gcc may emit the following instructions
       * to remove the arguments from the stack:
       *   cmpqd 0,tos        - to remove 4 bytes from the stack
       *   cmpd tos,tos       - to remove 8 bytes from the stack
       *   adjsp[bwd] -n      - to remove n bytes from the stack
       * Gcc sometimes delays emitting these instructions and
       * may even throw a branch between our feet.
       */
      inst = read_memory_integer (argp, 4);
      args = read_memory_integer (argp + 2, 4);
      if ((inst & 0xff) == 0xea)
	{			/* br */
	  args = ((inst >> 8) & 0xffffff) | (args << 24);
	  if (args & 0x80)
	    {
	      if (args & 0x40)
		{
		  args = ntohl (args);
		}
	      else
		{
		  args = ntohs (args & 0xffff);
		  if (args & 0x2000)
		    args |= 0xc000;
		}
	    }
	  else
	    {
	      args = args & 0xff;
	      if (args & 0x40)
		args |= 0x80;
	    }
	  argp += args;
	  continue;
	}
      if ((inst & 0xffff) == 0xb81f)	/* cmpqd 0,tos */
	return (1);
      else if ((inst & 0xffff) == 0xbdc7)	/* cmpd tos,tos */
	return (2);
      else if ((inst & 0xfffc) == 0xa57c)
	{			/* adjsp[bwd] */
	  switch (inst & 3)
	    {
	    case 0:
	      args = ((args & 0xff) + 0x80);
	      break;
	    case 1:
	      args = ((ntohs (args) & 0xffff) + 0x8000);
	      break;
	    case 3:
	      args = -ntohl (args);
	      break;
	    default:
	      return (-1);
	    }
	  if (args / 4 > 10 || (args & 3) != 0)
	    continue;
	  return (args / 4);
	}
      argp += 1;
    }
  return (-1);
}
Commit	Line	Data
c906108c SS	1	/* Functions specific to running gdb native on an ns32k running NetBSD
	2	Copyright 1989, 1992, 1993, 1994, 1996 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 <sys/types.h>
	22	#include <sys/ptrace.h>
	23	#include <machine/reg.h>
	24	#include <machine/frame.h>
	25	#include <machine/pcb.h>
	26
	27	#include "defs.h"
	28	#include "inferior.h"
	29	#include "target.h"
	30	#include "gdbcore.h"
	31
	32	#define RF(dst, src) \
	33	memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
	34
	35	#define RS(src, dst) \
	36	memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
	37
	38	void
fba45db2	39	fetch_inferior_registers (int regno)
c906108c SS	40	{
	41	struct reg inferior_registers;
	42	struct fpreg inferior_fpregisters;
	43
	44	ptrace (PT_GETREGS, inferior_pid,
c5aa993b	45	(PTRACE_ARG3_TYPE) & inferior_registers, 0);
c906108c	46	ptrace (PT_GETFPREGS, inferior_pid,
c5aa993b JM	47	(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
	48
	49	RF (R0_REGNUM + 0, inferior_registers.r_r0);
	50	RF (R0_REGNUM + 1, inferior_registers.r_r1);
	51	RF (R0_REGNUM + 2, inferior_registers.r_r2);
	52	RF (R0_REGNUM + 3, inferior_registers.r_r3);
	53	RF (R0_REGNUM + 4, inferior_registers.r_r4);
	54	RF (R0_REGNUM + 5, inferior_registers.r_r5);
	55	RF (R0_REGNUM + 6, inferior_registers.r_r6);
	56	RF (R0_REGNUM + 7, inferior_registers.r_r7);
	57
	58	RF (SP_REGNUM, inferior_registers.r_sp);
	59	RF (FP_REGNUM, inferior_registers.r_fp);
	60	RF (PC_REGNUM, inferior_registers.r_pc);
	61	RF (PS_REGNUM, inferior_registers.r_psr);
	62
	63	RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
	64	RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
	65	RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
	66	RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
	67	RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
	68	RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
	69	RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
	70	RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
	71	RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
	72	registers_fetched ();
c906108c SS	73	}
	74
	75	void
fba45db2	76	store_inferior_registers (int regno)
c906108c SS	77	{
	78	struct reg inferior_registers;
	79	struct fpreg inferior_fpregisters;
	80
c5aa993b JM	81	RS (R0_REGNUM + 0, inferior_registers.r_r0);
	82	RS (R0_REGNUM + 1, inferior_registers.r_r1);
	83	RS (R0_REGNUM + 2, inferior_registers.r_r2);
	84	RS (R0_REGNUM + 3, inferior_registers.r_r3);
	85	RS (R0_REGNUM + 4, inferior_registers.r_r4);
	86	RS (R0_REGNUM + 5, inferior_registers.r_r5);
	87	RS (R0_REGNUM + 6, inferior_registers.r_r6);
	88	RS (R0_REGNUM + 7, inferior_registers.r_r7);
	89
	90	RS (SP_REGNUM, inferior_registers.r_sp);
	91	RS (FP_REGNUM, inferior_registers.r_fp);
	92	RS (PC_REGNUM, inferior_registers.r_pc);
	93	RS (PS_REGNUM, inferior_registers.r_psr);
	94
	95	RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
	96	RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
	97	RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
	98	RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
	99	RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
	100	RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
	101	RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
	102	RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
	103	RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
c906108c SS	104
c906108c SS	105	ptrace (PT_SETREGS, inferior_pid,
c5aa993b	106	(PTRACE_ARG3_TYPE) & inferior_registers, 0);
c906108c	107	ptrace (PT_SETFPREGS, inferior_pid,
c5aa993b	108	(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
c906108c SS	109	}
	110	\f
	111
	112	/* XXX - Add this to machine/regs.h instead? */
c5aa993b JM	113	struct coreregs
c5aa993b JM	114	{
c906108c SS	115	struct reg intreg;
	116	struct fpreg freg;
	117	};
	118
	119	/* Get registers from a core file. */
	120	static void
	121	fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
	122	char *core_reg_sect;
	123	unsigned core_reg_size;
	124	int which;
	125	unsigned int reg_addr; /* Unused in this version */
	126	{
	127	struct coreregs *core_reg;
	128
c5aa993b	129	core_reg = (struct coreregs *) core_reg_sect;
c906108c SS	130
	131	/*
	132	* We have all registers
	133	* in the first core section.
	134	* Ignore which.
	135	*/
	136
c5aa993b JM	137	if (core_reg_size < sizeof (*core_reg))
	138	{
	139	fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
	140	return;
	141	}
c906108c SS	142
c906108c SS	143	/* Integer registers */
c5aa993b JM	144	RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
	145	RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
	146	RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
	147	RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
	148	RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
	149	RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
	150	RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
	151	RF (R0_REGNUM + 7, core_reg->intreg.r_r7);
	152
	153	RF (SP_REGNUM, core_reg->intreg.r_sp);
	154	RF (FP_REGNUM, core_reg->intreg.r_fp);
	155	RF (PC_REGNUM, core_reg->intreg.r_pc);
	156	RF (PS_REGNUM, core_reg->intreg.r_psr);
c906108c SS	157
c906108c SS	158	/* Floating point registers */
c5aa993b JM	159	RF (FPS_REGNUM, core_reg->freg.r_fsr);
	160	RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
	161	RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
	162	RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
	163	RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
	164	RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
	165	RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
	166	RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
	167	RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
c906108c SS	168	registers_fetched ();
	169	}
	170
	171	/* Register that we are able to handle ns32knbsd core file formats.
	172	FIXME: is this really bfd_target_unknown_flavour? */
	173
	174	static struct core_fns nat_core_fns =
	175	{
2acceee2 JM	176	bfd_target_unknown_flavour, /* core_flavour */
	177	default_check_format, /* check_format */
	178	default_core_sniffer, /* core_sniffer */
	179	fetch_core_registers, /* core_read_registers */
	180	NULL /* next */
c906108c SS	181	};
	182
	183	void
fba45db2	184	_initialize_ns32knbsd_nat (void)
c906108c SS	185	{
	186	add_core_fns (&nat_core_fns);
	187	}
	188	\f
	189
	190	/*
	191	* kernel_u_size() is not helpful on NetBSD because
	192	* the "u" struct is NOT in the core dump file.
	193	*/
	194
	195	#ifdef FETCH_KCORE_REGISTERS
	196	/*
	197	* Get registers from a kernel crash dump or live kernel.
	198	* Called by kcore-nbsd.c:get_kcore_registers().
	199	*/
	200	void
fba45db2	201	fetch_kcore_registers (struct pcb *pcb)
c906108c SS	202	{
	203	struct switchframe sf;
	204	struct reg intreg;
	205	int dummy;
	206
	207	/* Integer registers */
c5aa993b JM	208	if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
c5aa993b JM	209	error ("Cannot read integer registers.");
c906108c SS	210
c906108c SS	211	/* We use the psr at kernel entry */
c5aa993b JM	212	if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
c5aa993b JM	213	error ("Cannot read processor status register.");
c906108c SS	214
c906108c SS	215	dummy = 0;
c5aa993b JM	216	RF (R0_REGNUM + 0, dummy);
	217	RF (R0_REGNUM + 1, dummy);
	218	RF (R0_REGNUM + 2, dummy);
	219	RF (R0_REGNUM + 3, sf.sf_r3);
	220	RF (R0_REGNUM + 4, sf.sf_r4);
	221	RF (R0_REGNUM + 5, sf.sf_r5);
	222	RF (R0_REGNUM + 6, sf.sf_r6);
	223	RF (R0_REGNUM + 7, sf.sf_r7);
c906108c SS	224
c906108c SS	225	dummy = pcb->pcb_kfp + 8;
c5aa993b JM	226	RF (SP_REGNUM, dummy);
	227	RF (FP_REGNUM, sf.sf_fp);
	228	RF (PC_REGNUM, sf.sf_pc);
	229	RF (PS_REGNUM, intreg.r_psr);
c906108c SS	230
c906108c SS	231	/* Floating point registers */
c5aa993b JM	232	RF (FPS_REGNUM, pcb->pcb_fsr);
	233	RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
	234	RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
	235	RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
	236	RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
	237	RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
	238	RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
	239	RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
	240	RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
c906108c SS	241	registers_fetched ();
c906108c SS	242	}
c5aa993b	243	#endif /* FETCH_KCORE_REGISTERS */
c906108c SS	244
c906108c SS	245	void
fba45db2	246	clear_regs (void)
c906108c SS	247	{
	248	double zero = 0.0;
	249	int null = 0;
c5aa993b	250
c906108c	251	/* Integer registers */
c5aa993b JM	252	RF (R0_REGNUM + 0, null);
	253	RF (R0_REGNUM + 1, null);
	254	RF (R0_REGNUM + 2, null);
	255	RF (R0_REGNUM + 3, null);
	256	RF (R0_REGNUM + 4, null);
	257	RF (R0_REGNUM + 5, null);
	258	RF (R0_REGNUM + 6, null);
	259	RF (R0_REGNUM + 7, null);
	260
	261	RF (SP_REGNUM, null);
	262	RF (FP_REGNUM, null);
	263	RF (PC_REGNUM, null);
	264	RF (PS_REGNUM, null);
c906108c SS	265
c906108c SS	266	/* Floating point registers */
c5aa993b JM	267	RF (FPS_REGNUM, zero);
	268	RF (FP0_REGNUM + 0, zero);
	269	RF (FP0_REGNUM + 2, zero);
	270	RF (FP0_REGNUM + 4, zero);
	271	RF (FP0_REGNUM + 6, zero);
	272	RF (LP0_REGNUM + 0, zero);
	273	RF (LP0_REGNUM + 1, zero);
	274	RF (LP0_REGNUM + 2, zero);
	275	RF (LP0_REGNUM + 3, zero);
c906108c SS	276	return;
	277	}
	278
	279	/* Return number of args passed to a frame.
	280	Can return -1, meaning no way to tell. */
	281
	282	int
fba45db2	283	frame_num_args (struct frame_info *fi)
c906108c	284	{
c5aa993b JM	285	CORE_ADDR enter_addr;
	286	CORE_ADDR argp;
	287	int inst;
	288	int args;
	289	int i;
	290
	291	if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
	292	{
	293	/* main is always called with three args */
	294	return (3);
	295	}
	296	enter_addr = ns32k_get_enter_addr (fi->pc);
	297	if (enter_addr = 0)
	298	return (-1);
	299	argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
	300	for (i = 0; i < 16; i++)
	301	{
	302	/*
	303	* After a bsr gcc may emit the following instructions
	304	* to remove the arguments from the stack:
	305	* cmpqd 0,tos - to remove 4 bytes from the stack
	306	* cmpd tos,tos - to remove 8 bytes from the stack
	307	* adjsp[bwd] -n - to remove n bytes from the stack
	308	* Gcc sometimes delays emitting these instructions and
	309	* may even throw a branch between our feet.
	310	*/
	311	inst = read_memory_integer (argp, 4);
	312	args = read_memory_integer (argp + 2, 4);
	313	if ((inst & 0xff) == 0xea)
	314	{ /* br */
	315	args = ((inst >> 8) & 0xffffff) \| (args << 24);
	316	if (args & 0x80)
	317	{
	318	if (args & 0x40)
	319	{
	320	args = ntohl (args);
c906108c	321	}
c5aa993b JM	322	else
	323	{
	324	args = ntohs (args & 0xffff);
	325	if (args & 0x2000)
	326	args \|= 0xc000;
c906108c	327	}
c5aa993b JM	328	}
	329	else
	330	{
	331	args = args & 0xff;
	332	if (args & 0x40)
	333	args \|= 0x80;
	334	}
	335	argp += args;
	336	continue;
	337	}
	338	if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
	339	return (1);
	340	else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
	341	return (2);
	342	else if ((inst & 0xfffc) == 0xa57c)
	343	{ /* adjsp[bwd] */
	344	switch (inst & 3)
	345	{
	346	case 0:
	347	args = ((args & 0xff) + 0x80);
	348	break;
	349	case 1:
	350	args = ((ntohs (args) & 0xffff) + 0x8000);
	351	break;
	352	case 3:
	353	args = -ntohl (args);
	354	break;
	355	default:
	356	return (-1);
	357	}
	358	if (args / 4 > 10 \|\| (args & 3) != 0)
	359	continue;
	360	return (args / 4);
c906108c	361	}
c5aa993b JM	362	argp += 1;
	363	}
	364	return (-1);
c906108c	365	}