[binutils.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
3dcac15f JM	1	/* Functions specific to running gdb native on an ns32k running NetBSD
	2	Copyright 1989, 1992, 1993, 1994, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	19
	20	#include <sys/types.h>
	21	#include <sys/ptrace.h>
	22	#include <machine/reg.h>
	23	#include <machine/frame.h>
	24	#include <machine/pcb.h>
	25
	26	#include "defs.h"
	27	#include "inferior.h"
	28	#include "target.h"
	29	#include "gdbcore.h"
	30
	31	#define RF(dst, src) \
	32	memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
	33
	34	#define RS(src, dst) \
	35	memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
	36
	37	void
	38	fetch_inferior_registers (regno)
	39	int regno;
	40	{
	41	struct reg inferior_registers;
	42	struct fpreg inferior_fpregisters;
	43
	44	ptrace (PT_GETREGS, inferior_pid,
	45	(PTRACE_ARG3_TYPE) &inferior_registers, 0);
	46	ptrace (PT_GETFPREGS, inferior_pid,
	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 ();
73	}
74
75	void
76	store_inferior_registers (regno)
77	int regno;
78	{
79	struct reg inferior_registers;
80	struct fpreg inferior_fpregisters;
81
82	RS(R0_REGNUM + 0, inferior_registers.r_r0);
83	RS(R0_REGNUM + 1, inferior_registers.r_r1);
84	RS(R0_REGNUM + 2, inferior_registers.r_r2);
85	RS(R0_REGNUM + 3, inferior_registers.r_r3);
86	RS(R0_REGNUM + 4, inferior_registers.r_r4);
87	RS(R0_REGNUM + 5, inferior_registers.r_r5);
88	RS(R0_REGNUM + 6, inferior_registers.r_r6);
89	RS(R0_REGNUM + 7, inferior_registers.r_r7);
90
91	RS(SP_REGNUM , inferior_registers.r_sp);
92	RS(FP_REGNUM , inferior_registers.r_fp);
93	RS(PC_REGNUM , inferior_registers.r_pc);
94	RS(PS_REGNUM , inferior_registers.r_psr);
95
96	RS(FPS_REGNUM , inferior_fpregisters.r_fsr);
97	RS(FP0_REGNUM +0, inferior_fpregisters.r_freg[0]);
98	RS(FP0_REGNUM +2, inferior_fpregisters.r_freg[2]);
99	RS(FP0_REGNUM +4, inferior_fpregisters.r_freg[4]);
100	RS(FP0_REGNUM +6, inferior_fpregisters.r_freg[6]);
101	RS(LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
102	RS(LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
103	RS(LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
104	RS(LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
105
106	ptrace (PT_SETREGS, inferior_pid,
107	(PTRACE_ARG3_TYPE) &inferior_registers, 0);
108	ptrace (PT_SETFPREGS, inferior_pid,
109	(PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
110	}
111	\f
112
113	/* XXX - Add this to machine/regs.h instead? */
114	struct coreregs {
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
129	core_reg = (struct coreregs *)core_reg_sect;
130
131	/*
132	* We have all registers
133	* in the first core section.
134	* Ignore which.
135	*/
136
137	if (core_reg_size < sizeof(*core_reg)) {
138	fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
139	return;
140	}
141
142	/* Integer registers */
143	RF(R0_REGNUM + 0, core_reg->intreg.r_r0);
144	RF(R0_REGNUM + 1, core_reg->intreg.r_r1);
145	RF(R0_REGNUM + 2, core_reg->intreg.r_r2);
146	RF(R0_REGNUM + 3, core_reg->intreg.r_r3);
147	RF(R0_REGNUM + 4, core_reg->intreg.r_r4);
148	RF(R0_REGNUM + 5, core_reg->intreg.r_r5);
149	RF(R0_REGNUM + 6, core_reg->intreg.r_r6);
150	RF(R0_REGNUM + 7, core_reg->intreg.r_r7);
151
152	RF(SP_REGNUM , core_reg->intreg.r_sp);
153	RF(FP_REGNUM , core_reg->intreg.r_fp);
154	RF(PC_REGNUM , core_reg->intreg.r_pc);
155	RF(PS_REGNUM , core_reg->intreg.r_psr);
156
157	/* Floating point registers */
158	RF(FPS_REGNUM , core_reg->freg.r_fsr);
159	RF(FP0_REGNUM +0, core_reg->freg.r_freg[0]);
160	RF(FP0_REGNUM +2, core_reg->freg.r_freg[2]);
161	RF(FP0_REGNUM +4, core_reg->freg.r_freg[4]);
162	RF(FP0_REGNUM +6, core_reg->freg.r_freg[6]);
163	RF(LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
164	RF(LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
165	RF(LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
166	RF(LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
167	registers_fetched ();
168	}
169
170	/* Register that we are able to handle ns32knbsd core file formats.
171	FIXME: is this really bfd_target_unknown_flavour? */
172
173	static struct core_fns nat_core_fns =
174	{
175	bfd_target_unknown_flavour,
176	fetch_core_registers,
177	NULL
178	};
179
180	void
181	_initialize_ns32knbsd_nat ()
182	{
183	add_core_fns (&nat_core_fns);
184	}
185	\f
186
187	/*
188	* kernel_u_size() is not helpful on NetBSD because
189	* the "u" struct is NOT in the core dump file.
190	*/
191
192	#ifdef FETCH_KCORE_REGISTERS
193	/*
194	* Get registers from a kernel crash dump or live kernel.
195	* Called by kcore-nbsd.c:get_kcore_registers().
196	*/
197	void
198	fetch_kcore_registers (pcb)
199	struct pcb *pcb;
200	{
201	struct switchframe sf;
202	struct reg intreg;
203	int dummy;
204
205	/* Integer registers */
206	if (target_read_memory((CORE_ADDR)pcb->pcb_ksp, (char *)&sf, sizeof sf))
207	error("Cannot read integer registers.");
208
209	/* We use the psr at kernel entry */
210	if (target_read_memory((CORE_ADDR)pcb->pcb_onstack, (char *)&intreg, sizeof intreg))
211	error("Cannot read processor status register.");
212
213	dummy = 0;
214	RF(R0_REGNUM + 0, dummy);
215	RF(R0_REGNUM + 1, dummy);
216	RF(R0_REGNUM + 2, dummy);
217	RF(R0_REGNUM + 3, sf.sf_r3);
218	RF(R0_REGNUM + 4, sf.sf_r4);
219	RF(R0_REGNUM + 5, sf.sf_r5);
220	RF(R0_REGNUM + 6, sf.sf_r6);
221	RF(R0_REGNUM + 7, sf.sf_r7);
222
223	dummy = pcb->pcb_kfp + 8;
224	RF(SP_REGNUM , dummy);
225	RF(FP_REGNUM , sf.sf_fp);
226	RF(PC_REGNUM , sf.sf_pc);
227	RF(PS_REGNUM , intreg.r_psr);
228
229	/* Floating point registers */
230	RF(FPS_REGNUM , pcb->pcb_fsr);
231	RF(FP0_REGNUM +0, pcb->pcb_freg[0]);
232	RF(FP0_REGNUM +2, pcb->pcb_freg[2]);
233	RF(FP0_REGNUM +4, pcb->pcb_freg[4]);
234	RF(FP0_REGNUM +6, pcb->pcb_freg[6]);
235	RF(LP0_REGNUM + 1, pcb->pcb_freg[1]);
236	RF(LP0_REGNUM + 3, pcb->pcb_freg[3]);
237	RF(LP0_REGNUM + 5, pcb->pcb_freg[5]);
238	RF(LP0_REGNUM + 7, pcb->pcb_freg[7]);
239	registers_fetched ();
240	}
241	#endif /* FETCH_KCORE_REGISTERS */
242
243	void
244	clear_regs()
245	{
246	double zero = 0.0;
247	int null = 0;
248
249	/* Integer registers */
250	RF(R0_REGNUM + 0, null);
251	RF(R0_REGNUM + 1, null);
252	RF(R0_REGNUM + 2, null);
253	RF(R0_REGNUM + 3, null);
254	RF(R0_REGNUM + 4, null);
255	RF(R0_REGNUM + 5, null);
256	RF(R0_REGNUM + 6, null);
257	RF(R0_REGNUM + 7, null);
258
259	RF(SP_REGNUM , null);
260	RF(FP_REGNUM , null);
261	RF(PC_REGNUM , null);
262	RF(PS_REGNUM , null);
263
264	/* Floating point registers */
265	RF(FPS_REGNUM , zero);
266	RF(FP0_REGNUM +0, zero);
267	RF(FP0_REGNUM +2, zero);
268	RF(FP0_REGNUM +4, zero);
269	RF(FP0_REGNUM +6, zero);
270	RF(LP0_REGNUM + 0, zero);
271	RF(LP0_REGNUM + 1, zero);
272	RF(LP0_REGNUM + 2, zero);
273	RF(LP0_REGNUM + 3, zero);
274	return;
275	}
276
277	/* Return number of args passed to a frame.
278	Can return -1, meaning no way to tell. */
279
280	int
281	frame_num_args(fi)
282	struct frame_info *fi;
283	{
284	CORE_ADDR enter_addr;
285	CORE_ADDR argp;
286	int inst;
287	int args;
288	int i;
289
290	if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000) {
291	/* main is always called with three args */
292	return(3);
293	}
294	enter_addr = ns32k_get_enter_addr(fi->pc);
295	if (enter_addr = 0)
296	return(-1);
297	argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL(fi) : FRAME_SAVED_PC(fi);
298	for (i = 0; i < 16; i++) {
299	/*
300	* After a bsr gcc may emit the following instructions
301	* to remove the arguments from the stack:
302	* cmpqd 0,tos - to remove 4 bytes from the stack
303	* cmpd tos,tos - to remove 8 bytes from the stack
304	* adjsp[bwd] -n - to remove n bytes from the stack
305	* Gcc sometimes delays emitting these instructions and
306	* may even throw a branch between our feet.
307	*/
308	inst = read_memory_integer(argp , 4);
309	args = read_memory_integer(argp + 2, 4);
310	if ((inst & 0xff) == 0xea) { /* br */
311	args = ((inst >> 8) & 0xffffff) \| (args << 24);
312	if (args & 0x80) {
313	if (args & 0x40) {
314	args = ntohl(args);
315	} else {
316	args = ntohs(args & 0xffff);
317	if (args & 0x2000)
318	args \|= 0xc000;
319	}
320	} else {
321	args = args & 0xff;
322	if (args & 0x40)
323	args \|= 0x80;
324	}
325	argp += args;
326	continue;
327	}
328	if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
329	return(1);
330	else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
331	return(2);
332	else if ((inst & 0xfffc) == 0xa57c) { /* adjsp[bwd] */
333	switch (inst & 3) {
334	case 0:
335	args = ((args & 0xff) + 0x80);
336	break;
337	case 1:
338	args = ((ntohs(args) & 0xffff) + 0x8000);
339	break;
340	case 3:
341	args = -ntohl(args);
342	break;
343	default:
344	return(-1);
345	}
346	if (args / 4 > 10 \|\| (args & 3) != 0)
347	continue;
348	return(args / 4);
349	}
350	argp += 1;
351	}
352	return(-1);
353	}