[thirdparty/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 (regno)
     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 (regno)
     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,
  fetch_core_registers,
  NULL
};

void
_initialize_ns32knbsd_nat ()
{
  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 (pcb)
     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 ()
{
  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 (fi)
     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
	39	fetch_inferior_registers (regno)
	40	int regno;
	41	{
	42	struct reg inferior_registers;
	43	struct fpreg inferior_fpregisters;
	44
	45	ptrace (PT_GETREGS, inferior_pid,
c5aa993b	46	(PTRACE_ARG3_TYPE) & inferior_registers, 0);
c906108c	47	ptrace (PT_GETFPREGS, inferior_pid,
c5aa993b JM	48	(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
	49
	50	RF (R0_REGNUM + 0, inferior_registers.r_r0);
	51	RF (R0_REGNUM + 1, inferior_registers.r_r1);
	52	RF (R0_REGNUM + 2, inferior_registers.r_r2);
	53	RF (R0_REGNUM + 3, inferior_registers.r_r3);
	54	RF (R0_REGNUM + 4, inferior_registers.r_r4);
	55	RF (R0_REGNUM + 5, inferior_registers.r_r5);
	56	RF (R0_REGNUM + 6, inferior_registers.r_r6);
	57	RF (R0_REGNUM + 7, inferior_registers.r_r7);
	58
	59	RF (SP_REGNUM, inferior_registers.r_sp);
	60	RF (FP_REGNUM, inferior_registers.r_fp);
	61	RF (PC_REGNUM, inferior_registers.r_pc);
	62	RF (PS_REGNUM, inferior_registers.r_psr);
	63
	64	RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
	65	RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
	66	RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
	67	RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
	68	RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
	69	RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
	70	RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
	71	RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
	72	RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
	73	registers_fetched ();
c906108c SS	74	}
	75
	76	void
	77	store_inferior_registers (regno)
	78	int regno;
	79	{
	80	struct reg inferior_registers;
	81	struct fpreg inferior_fpregisters;
	82
c5aa993b JM	83	RS (R0_REGNUM + 0, inferior_registers.r_r0);
	84	RS (R0_REGNUM + 1, inferior_registers.r_r1);
	85	RS (R0_REGNUM + 2, inferior_registers.r_r2);
	86	RS (R0_REGNUM + 3, inferior_registers.r_r3);
	87	RS (R0_REGNUM + 4, inferior_registers.r_r4);
	88	RS (R0_REGNUM + 5, inferior_registers.r_r5);
	89	RS (R0_REGNUM + 6, inferior_registers.r_r6);
	90	RS (R0_REGNUM + 7, inferior_registers.r_r7);
	91
	92	RS (SP_REGNUM, inferior_registers.r_sp);
	93	RS (FP_REGNUM, inferior_registers.r_fp);
	94	RS (PC_REGNUM, inferior_registers.r_pc);
	95	RS (PS_REGNUM, inferior_registers.r_psr);
	96
	97	RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
	98	RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
	99	RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
	100	RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
	101	RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
	102	RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
	103	RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
	104	RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
	105	RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
c906108c SS	106
c906108c SS	107	ptrace (PT_SETREGS, inferior_pid,
c5aa993b	108	(PTRACE_ARG3_TYPE) & inferior_registers, 0);
c906108c	109	ptrace (PT_SETFPREGS, inferior_pid,
c5aa993b	110	(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
c906108c SS	111	}
	112	\f
	113
	114	/* XXX - Add this to machine/regs.h instead? */
c5aa993b JM	115	struct coreregs
c5aa993b JM	116	{
c906108c SS	117	struct reg intreg;
	118	struct fpreg freg;
	119	};
	120
	121	/* Get registers from a core file. */
	122	static void
	123	fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
	124	char *core_reg_sect;
	125	unsigned core_reg_size;
	126	int which;
	127	unsigned int reg_addr; /* Unused in this version */
	128	{
	129	struct coreregs *core_reg;
	130
c5aa993b	131	core_reg = (struct coreregs *) core_reg_sect;
c906108c SS	132
	133	/*
	134	* We have all registers
	135	* in the first core section.
	136	* Ignore which.
	137	*/
	138
c5aa993b JM	139	if (core_reg_size < sizeof (*core_reg))
	140	{
	141	fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
	142	return;
	143	}
c906108c SS	144
c906108c SS	145	/* Integer registers */
c5aa993b JM	146	RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
	147	RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
	148	RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
	149	RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
	150	RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
	151	RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
	152	RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
	153	RF (R0_REGNUM + 7, core_reg->intreg.r_r7);
	154
	155	RF (SP_REGNUM, core_reg->intreg.r_sp);
	156	RF (FP_REGNUM, core_reg->intreg.r_fp);
	157	RF (PC_REGNUM, core_reg->intreg.r_pc);
	158	RF (PS_REGNUM, core_reg->intreg.r_psr);
c906108c SS	159
c906108c SS	160	/* Floating point registers */
c5aa993b JM	161	RF (FPS_REGNUM, core_reg->freg.r_fsr);
	162	RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
	163	RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
	164	RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
	165	RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
	166	RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
	167	RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
	168	RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
	169	RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
c906108c SS	170	registers_fetched ();
	171	}
	172
	173	/* Register that we are able to handle ns32knbsd core file formats.
	174	FIXME: is this really bfd_target_unknown_flavour? */
	175
	176	static struct core_fns nat_core_fns =
	177	{
	178	bfd_target_unknown_flavour,
	179	fetch_core_registers,
	180	NULL
	181	};
	182
	183	void
	184	_initialize_ns32knbsd_nat ()
	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
	201	fetch_kcore_registers (pcb)
	202	struct pcb *pcb;
	203	{
	204	struct switchframe sf;
	205	struct reg intreg;
	206	int dummy;
	207
	208	/* Integer registers */
c5aa993b JM	209	if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
c5aa993b JM	210	error ("Cannot read integer registers.");
c906108c SS	211
c906108c SS	212	/* We use the psr at kernel entry */
c5aa993b JM	213	if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
c5aa993b JM	214	error ("Cannot read processor status register.");
c906108c SS	215
c906108c SS	216	dummy = 0;
c5aa993b JM	217	RF (R0_REGNUM + 0, dummy);
	218	RF (R0_REGNUM + 1, dummy);
	219	RF (R0_REGNUM + 2, dummy);
	220	RF (R0_REGNUM + 3, sf.sf_r3);
	221	RF (R0_REGNUM + 4, sf.sf_r4);
	222	RF (R0_REGNUM + 5, sf.sf_r5);
	223	RF (R0_REGNUM + 6, sf.sf_r6);
	224	RF (R0_REGNUM + 7, sf.sf_r7);
c906108c SS	225
c906108c SS	226	dummy = pcb->pcb_kfp + 8;
c5aa993b JM	227	RF (SP_REGNUM, dummy);
	228	RF (FP_REGNUM, sf.sf_fp);
	229	RF (PC_REGNUM, sf.sf_pc);
	230	RF (PS_REGNUM, intreg.r_psr);
c906108c SS	231
c906108c SS	232	/* Floating point registers */
c5aa993b JM	233	RF (FPS_REGNUM, pcb->pcb_fsr);
	234	RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
	235	RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
	236	RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
	237	RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
	238	RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
	239	RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
	240	RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
	241	RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
c906108c SS	242	registers_fetched ();
c906108c SS	243	}
c5aa993b	244	#endif /* FETCH_KCORE_REGISTERS */
c906108c SS	245
c906108c SS	246	void
c5aa993b	247	clear_regs ()
c906108c SS	248	{
	249	double zero = 0.0;
	250	int null = 0;
c5aa993b	251
c906108c	252	/* Integer registers */
c5aa993b JM	253	RF (R0_REGNUM + 0, null);
	254	RF (R0_REGNUM + 1, null);
	255	RF (R0_REGNUM + 2, null);
	256	RF (R0_REGNUM + 3, null);
	257	RF (R0_REGNUM + 4, null);
	258	RF (R0_REGNUM + 5, null);
	259	RF (R0_REGNUM + 6, null);
	260	RF (R0_REGNUM + 7, null);
	261
	262	RF (SP_REGNUM, null);
	263	RF (FP_REGNUM, null);
	264	RF (PC_REGNUM, null);
	265	RF (PS_REGNUM, null);
c906108c SS	266
c906108c SS	267	/* Floating point registers */
c5aa993b JM	268	RF (FPS_REGNUM, zero);
	269	RF (FP0_REGNUM + 0, zero);
	270	RF (FP0_REGNUM + 2, zero);
	271	RF (FP0_REGNUM + 4, zero);
	272	RF (FP0_REGNUM + 6, zero);
	273	RF (LP0_REGNUM + 0, zero);
	274	RF (LP0_REGNUM + 1, zero);
	275	RF (LP0_REGNUM + 2, zero);
	276	RF (LP0_REGNUM + 3, zero);
c906108c SS	277	return;
	278	}
	279
	280	/* Return number of args passed to a frame.
	281	Can return -1, meaning no way to tell. */
	282
	283	int
c5aa993b JM	284	frame_num_args (fi)
c5aa993b JM	285	struct frame_info *fi;
c906108c	286	{
c5aa993b JM	287	CORE_ADDR enter_addr;
	288	CORE_ADDR argp;
	289	int inst;
	290	int args;
	291	int i;
	292
	293	if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
	294	{
	295	/* main is always called with three args */
	296	return (3);
	297	}
	298	enter_addr = ns32k_get_enter_addr (fi->pc);
	299	if (enter_addr = 0)
	300	return (-1);
	301	argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
	302	for (i = 0; i < 16; i++)
	303	{
	304	/*
	305	* After a bsr gcc may emit the following instructions
	306	* to remove the arguments from the stack:
	307	* cmpqd 0,tos - to remove 4 bytes from the stack
	308	* cmpd tos,tos - to remove 8 bytes from the stack
	309	* adjsp[bwd] -n - to remove n bytes from the stack
	310	* Gcc sometimes delays emitting these instructions and
	311	* may even throw a branch between our feet.
	312	*/
	313	inst = read_memory_integer (argp, 4);
	314	args = read_memory_integer (argp + 2, 4);
	315	if ((inst & 0xff) == 0xea)
	316	{ /* br */
	317	args = ((inst >> 8) & 0xffffff) \| (args << 24);
	318	if (args & 0x80)
	319	{
	320	if (args & 0x40)
	321	{
	322	args = ntohl (args);
c906108c	323	}
c5aa993b JM	324	else
	325	{
	326	args = ntohs (args & 0xffff);
	327	if (args & 0x2000)
	328	args \|= 0xc000;
c906108c	329	}
c5aa993b JM	330	}
	331	else
	332	{
	333	args = args & 0xff;
	334	if (args & 0x40)
	335	args \|= 0x80;
	336	}
	337	argp += args;
	338	continue;
	339	}
	340	if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
	341	return (1);
	342	else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
	343	return (2);
	344	else if ((inst & 0xfffc) == 0xa57c)
	345	{ /* adjsp[bwd] */
	346	switch (inst & 3)
	347	{
	348	case 0:
	349	args = ((args & 0xff) + 0x80);
	350	break;
	351	case 1:
	352	args = ((ntohs (args) & 0xffff) + 0x8000);
	353	break;
	354	case 3:
	355	args = -ntohl (args);
	356	break;
	357	default:
	358	return (-1);
	359	}
	360	if (args / 4 > 10 \|\| (args & 3) != 0)
	361	continue;
	362	return (args / 4);
c906108c	363	}
c5aa993b JM	364	argp += 1;
	365	}
	366	return (-1);
c906108c	367	}