[deliverable/binutils-gdb.git] / gdb / remote-vxmips.c

/* MIPS-dependent portions of the RPC protocol
   used with a VxWorks target 

Contributed by Wind River Systems.

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 <stdio.h>
#include "defs.h"

#include "vx-share/regPacket.h"  
#include "frame.h"
#include "inferior.h"
#include "wait.h"
#include "target.h"
#include "gdbcore.h"
#include "command.h"
#include "symtab.h"
#include "symfile.h"		/* for struct complaint */

#include "gdb_string.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <sys/time.h>		/* UTek's <rpc/rpc.h> doesn't #incl this */
#include <netdb.h>
#include "vx-share/ptrace.h"
#include "vx-share/xdr_ptrace.h"
#include "vx-share/xdr_ld.h"
#include "vx-share/xdr_rdb.h"
#include "vx-share/dbgRpcLib.h"

/* get rid of value.h if possible */
#include <value.h>
#include <symtab.h>

/* Flag set if target has fpu */

extern int target_has_fp;

/* Generic register read/write routines in remote-vx.c.  */

extern void net_read_registers ();
extern void net_write_registers ();

/* Read a register or registers from the VxWorks target.
   REGNO is the register to read, or -1 for all; currently,
   it is ignored.  FIXME look at regno to improve efficiency.  */

void
vx_read_register (regno)
     int regno;
{
  char mips_greg_packet[MIPS_GREG_PLEN];
  char mips_fpreg_packet[MIPS_FPREG_PLEN];

  /* Get general-purpose registers.  */

  net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS);

  /* this code copies the registers obtained by RPC 
     stored in a structure(s) like this :
     
    	Register(s)		Offset(s)
   	gp 0-31			0x00
   	hi			0x80
   	lo			0x84
   	sr			0x88
   	pc			0x8c
    
     into a stucture like this:
   	
   	0x00	GP 0-31
   	0x80   	SR
   	0x84	LO
   	0x88	HI
   	0x8C	BAD    		--- Not available currently
   	0x90	CAUSE    	--- Not available currently
   	0x94	PC
   	0x98	FP 0-31
   	0x118	FCSR
   	0x11C	FIR    		--- Not available currently
   	0x120	FP	    	--- Not available currently
   
     structure is 0x124 (292) bytes in length */
   
  /* Copy the general registers.  */
  
  bcopy (&mips_greg_packet[MIPS_R_GP0], &registers[0], 32 * MIPS_GREG_SIZE);
  
  /* Copy SR, LO, HI, and PC.  */
  
  bcopy (&mips_greg_packet[MIPS_R_SR],
         &registers[REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE);
  bcopy (&mips_greg_packet[MIPS_R_LO],
         &registers[REGISTER_BYTE (LO_REGNUM)], MIPS_GREG_SIZE);
  bcopy (&mips_greg_packet[MIPS_R_HI],
         &registers[REGISTER_BYTE (HI_REGNUM)], MIPS_GREG_SIZE);
  bcopy (&mips_greg_packet[MIPS_R_PC],
         &registers[REGISTER_BYTE (PC_REGNUM)], MIPS_GREG_SIZE);
  
  /* If the target has floating point registers, fetch them.
     Otherwise, zero the floating point register values in
     registers[] for good measure, even though we might not
     need to.  */
    
  if (target_has_fp)
    {
      net_read_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
			  PTRACE_GETFPREGS);

      /* Copy the floating point registers.  */

      bcopy (&mips_fpreg_packet[MIPS_R_FP0], 
	     &registers[REGISTER_BYTE (FP0_REGNUM)],
	     REGISTER_RAW_SIZE (FP0_REGNUM) * 32);

      /* Copy the floating point control/status register (fpcsr).  */

      bcopy (&mips_fpreg_packet[MIPS_R_FPCSR], 
	     &registers[REGISTER_BYTE (FCRCS_REGNUM)],
	     REGISTER_RAW_SIZE (FCRCS_REGNUM));
    }	
  else
    {	
      bzero ((char *) &registers[REGISTER_BYTE (FP0_REGNUM)],
	     REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
      bzero ((char *) &registers[REGISTER_BYTE (FCRCS_REGNUM)],
	     REGISTER_RAW_SIZE (FCRCS_REGNUM));
    }		

  /* Mark the register cache valid.  */

  registers_fetched ();
}

/* Store a register or registers into the VxWorks target.
   REGNO is the register to store, or -1 for all; currently,
   it is ignored.  FIXME look at regno to improve efficiency.  */

vx_write_register (regno)
     int regno;
{
  char mips_greg_packet[MIPS_GREG_PLEN];
  char mips_fpreg_packet[MIPS_FPREG_PLEN];

  /* Store general registers.  */

  bcopy (&registers[0], &mips_greg_packet[MIPS_R_GP0], 32 * MIPS_GREG_SIZE);
  
  /* Copy SR, LO, HI, and PC.  */
  
  bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],
         &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE);
  bcopy (&registers[REGISTER_BYTE (LO_REGNUM)],
         &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE);
  bcopy (&registers[REGISTER_BYTE (HI_REGNUM)],
         &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE);
  bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],
         &mips_greg_packet[MIPS_R_PC], MIPS_GREG_SIZE);
  
  net_write_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_SETREGS);

  /* Store floating point registers if the target has them.  */

  if (target_has_fp)
    {
      /* Copy the floating point data registers.  */

      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
	     &mips_fpreg_packet[MIPS_R_FP0], 
	     REGISTER_RAW_SIZE (FP0_REGNUM) * 32);

      /* Copy the floating point control/status register (fpcsr).  */

      bcopy (&registers[REGISTER_BYTE (FCRCS_REGNUM)],
	     &mips_fpreg_packet[MIPS_R_FPCSR], 
	     REGISTER_RAW_SIZE (FCRCS_REGNUM));

      net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
			   PTRACE_SETFPREGS);
    }
}

/* Convert from an extended float to a double.
   The extended float is stored as raw data pointed to by FROM.
   Return the converted value as raw data in the double pointed to by TO.
   NOTE: mips uses standard two word doubles.  */

void
vx_convert_to_virtual (regno, from, to)
      int regno;
      char *from;
      char *to;
{
  bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
}

/* The converse:  convert from a double to an extended float.
   The double is stored as raw data pointed to by FROM.
   Return the converted value as raw data in the extended
   float pointed to by TO.  */

void
vx_convert_from_virtual (regno, from, to)
     int regno;
     char *from;
     char *to;
{
  bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
}
Commit	Line	Data
9c92940a KH	1	/* MIPS-dependent portions of the RPC protocol
	2	used with a VxWorks target
	3
	4	Contributed by Wind River Systems.
	5
	6	This file is part of GDB.
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
6c9638b4	20	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
9c92940a KH	21
	22	#include <stdio.h>
	23	#include "defs.h"
	24
	25	#include "vx-share/regPacket.h"
	26	#include "frame.h"
	27	#include "inferior.h"
	28	#include "wait.h"
	29	#include "target.h"
	30	#include "gdbcore.h"
	31	#include "command.h"
	32	#include "symtab.h"
	33	#include "symfile.h" /* for struct complaint */
	34
2b576293	35	#include "gdb_string.h"
9c92940a KH	36	#include <errno.h>
	37	#include <signal.h>
	38	#include <fcntl.h>
	39	#include <sys/types.h>
	40	#include <sys/time.h>
	41	#include <sys/socket.h>
	42	#include <rpc/rpc.h>
	43	#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
	44	#include <netdb.h>
	45	#include "vx-share/ptrace.h"
	46	#include "vx-share/xdr_ptrace.h"
	47	#include "vx-share/xdr_ld.h"
	48	#include "vx-share/xdr_rdb.h"
	49	#include "vx-share/dbgRpcLib.h"
	50
	51	/* get rid of value.h if possible */
	52	#include <value.h>
	53	#include <symtab.h>
	54
	55	/* Flag set if target has fpu */
	56
	57	extern int target_has_fp;
	58
	59	/* Generic register read/write routines in remote-vx.c. */
	60
	61	extern void net_read_registers ();
	62	extern void net_write_registers ();
	63
	64	/* Read a register or registers from the VxWorks target.
	65	REGNO is the register to read, or -1 for all; currently,
	66	it is ignored. FIXME look at regno to improve efficiency. */
	67
	68	void
	69	vx_read_register (regno)
	70	int regno;
	71	{
	72	char mips_greg_packet[MIPS_GREG_PLEN];
	73	char mips_fpreg_packet[MIPS_FPREG_PLEN];
	74
	75	/* Get general-purpose registers. */
	76
	77	net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS);
	78
	79	/* this code copies the registers obtained by RPC
	80	stored in a structure(s) like this :
	81
	82	Register(s) Offset(s)
	83	gp 0-31 0x00
	84	hi 0x80
	85	lo 0x84
	86	sr 0x88
	87	pc 0x8c
	88
	89	into a stucture like this:
	90
	91	0x00 GP 0-31
	92	0x80 SR
	93	0x84 LO
	94	0x88 HI
	95	0x8C BAD --- Not available currently
	96	0x90 CAUSE --- Not available currently
	97	0x94 PC
	98	0x98 FP 0-31
	99	0x118 FCSR
100	0x11C FIR --- Not available currently
101	0x120 FP --- Not available currently
102
103	structure is 0x124 (292) bytes in length */
104
105	/* Copy the general registers. */
106
107	bcopy (&mips_greg_packet[MIPS_R_GP0], &registers[0], 32 * MIPS_GREG_SIZE);
108
109	/* Copy SR, LO, HI, and PC. */
110
111	bcopy (&mips_greg_packet[MIPS_R_SR],
112	&registers[REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE);
113	bcopy (&mips_greg_packet[MIPS_R_LO],
114	&registers[REGISTER_BYTE (LO_REGNUM)], MIPS_GREG_SIZE);
115	bcopy (&mips_greg_packet[MIPS_R_HI],
116	&registers[REGISTER_BYTE (HI_REGNUM)], MIPS_GREG_SIZE);
117	bcopy (&mips_greg_packet[MIPS_R_PC],
118	&registers[REGISTER_BYTE (PC_REGNUM)], MIPS_GREG_SIZE);
119
120	/* If the target has floating point registers, fetch them.
121	Otherwise, zero the floating point register values in
122	registers[] for good measure, even though we might not
123	need to. */
124
125	if (target_has_fp)
126	{
127	net_read_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
128	PTRACE_GETFPREGS);
129
130	/* Copy the floating point registers. */
131
132	bcopy (&mips_fpreg_packet[MIPS_R_FP0],
133	&registers[REGISTER_BYTE (FP0_REGNUM)],
134	REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
135
136	/* Copy the floating point control/status register (fpcsr). */
137
138	bcopy (&mips_fpreg_packet[MIPS_R_FPCSR],
139	&registers[REGISTER_BYTE (FCRCS_REGNUM)],
140	REGISTER_RAW_SIZE (FCRCS_REGNUM));
141	}
142	else
143	{
144	bzero ((char *) &registers[REGISTER_BYTE (FP0_REGNUM)],
145	REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
146	bzero ((char *) &registers[REGISTER_BYTE (FCRCS_REGNUM)],
147	REGISTER_RAW_SIZE (FCRCS_REGNUM));
148	}
149
150	/* Mark the register cache valid. */
151
152	registers_fetched ();
153	}
154
155	/* Store a register or registers into the VxWorks target.
156	REGNO is the register to store, or -1 for all; currently,
157	it is ignored. FIXME look at regno to improve efficiency. */
158
159	vx_write_register (regno)
160	int regno;
161	{
162	char mips_greg_packet[MIPS_GREG_PLEN];
163	char mips_fpreg_packet[MIPS_FPREG_PLEN];
164
165	/* Store general registers. */
166
167	bcopy (&registers[0], &mips_greg_packet[MIPS_R_GP0], 32 * MIPS_GREG_SIZE);
168
169	/* Copy SR, LO, HI, and PC. */
170
171	bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],
172	&mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE);
173	bcopy (&registers[REGISTER_BYTE (LO_REGNUM)],
174	&mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE);
175	bcopy (&registers[REGISTER_BYTE (HI_REGNUM)],
176	&mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE);
177	bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],
178	&mips_greg_packet[MIPS_R_PC], MIPS_GREG_SIZE);
179
180	net_write_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_SETREGS);
181
182	/* Store floating point registers if the target has them. */
183
184	if (target_has_fp)
185	{
186	/* Copy the floating point data registers. */
187
188	bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
189	&mips_fpreg_packet[MIPS_R_FP0],
190	REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
191
192	/* Copy the floating point control/status register (fpcsr). */
193
194	bcopy (&registers[REGISTER_BYTE (FCRCS_REGNUM)],
195	&mips_fpreg_packet[MIPS_R_FPCSR],
196	REGISTER_RAW_SIZE (FCRCS_REGNUM));
197
198	net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
199	PTRACE_SETFPREGS);
200	}
201	}
202
203	/* Convert from an extended float to a double.
204	The extended float is stored as raw data pointed to by FROM.
205	Return the converted value as raw data in the double pointed to by TO.
206	NOTE: mips uses standard two word doubles. */
207
208	void
209	vx_convert_to_virtual (regno, from, to)
210	int regno;
211	char *from;
212	char *to;
213	{
214	bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
215	}
216
217	/* The converse: convert from a double to an extended float.
218	The double is stored as raw data pointed to by FROM.
219	Return the converted value as raw data in the extended
220	float pointed to by TO. */
221
222	void
223	vx_convert_from_virtual (regno, from, to)
224	int regno;
225	char *from;
226	char *to;
227	{
228	bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
229	}