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

/* sparc-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 "target.h"
#include "gdbcore.h"
#include "command.h"
#include "symtab.h"
#include "symfile.h"		/* for struct complaint */
#include "regcache.h"

#include "gdb_string.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>

#ifdef _AIX			/* IBM claims "void *malloc()" not char * */
#define malloc bogon_malloc
#endif

#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;

/* sparc floating point format descriptor, from "sparc-tdep.c."  */

extern struct ext_format ext_format_sparc;

/* 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 (int regno)
{
  char sparc_greg_packet[SPARC_GREG_PLEN];
  char sparc_fpreg_packet[SPARC_FPREG_PLEN];
  CORE_ADDR sp;

  /* Get general-purpose registers.  When copying values into
     registers [], don't assume that a location in registers []
     is properly aligned for the target data type.  */

  net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);

  /* Now copy the register values into registers[].
     Note that this code depends on the ordering of the REGNUMs
     as defined in "tm-sparc.h".  */

  bcopy (&sparc_greg_packet[SPARC_R_G0],
	 &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
  bcopy (&sparc_greg_packet[SPARC_R_Y],
	 &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);

  /* Now write the local and in registers to the register window
     spill area in the frame.  VxWorks does not do this for the
     active frame automatically; it greatly simplifies debugging
     (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */

  sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
			REGISTER_RAW_SIZE (CORE_ADDR));
  write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
		16 * REGISTER_RAW_SIZE (L0_REGNUM));

  /* 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 (sparc_fpreg_packet, SPARC_FPREG_PLEN,
			  PTRACE_GETFPREGS);
      bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
	     &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
      bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
	     &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
    }
  else
    {
      bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
      bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
    }

  /* 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.  */

void
vx_write_register (int regno)
{
  char sparc_greg_packet[SPARC_GREG_PLEN];
  char sparc_fpreg_packet[SPARC_FPREG_PLEN];
  int in_gp_regs;
  int in_fp_regs;
  CORE_ADDR sp;

  /* Store general purpose registers.  When copying values from
     registers [], don't assume that a location in registers []
     is properly aligned for the target data type.  */

  in_gp_regs = 1;
  in_fp_regs = 1;
  if (regno >= 0)
    {
      if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
	  || (Y_REGNUM <= regno && regno <= NPC_REGNUM))
	in_fp_regs = 0;
      else
	in_gp_regs = 0;
    }
  if (in_gp_regs)
    {
      bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
	     &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
      bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
	     &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);

      net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);

      /* If this is a local or in register, or we're storing all
         registers, update the register window spill area.  */

      if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
	{
	  sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
				REGISTER_RAW_SIZE (CORE_ADDR));
	  write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
			16 * REGISTER_RAW_SIZE (L0_REGNUM));
	}
    }

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

  if (in_fp_regs && target_has_fp)
    {
      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
	     &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
      bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
	     &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);

      net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
			   PTRACE_SETFPREGS);
    }
}
Commit	Line	Data
c906108c SS	1	/* sparc-dependent portions of the RPC protocol
	2	used with a VxWorks target
	3
c5aa993b	4	Contributed by Wind River Systems.
c906108c	5
c5aa993b	6	This file is part of GDB.
c906108c	7
c5aa993b JM	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.
c906108c	12
c5aa993b JM	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.
c906108c	17
c5aa993b JM	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
	20	Foundation, Inc., 59 Temple Place - Suite 330,
	21	Boston, MA 02111-1307, USA. */
c906108c SS	22
	23	#include <stdio.h>
	24	#include "defs.h"
	25
c5aa993b	26	#include "vx-share/regPacket.h"
c906108c SS	27	#include "frame.h"
c906108c SS	28	#include "inferior.h"
c906108c SS	29	#include "target.h"
	30	#include "gdbcore.h"
	31	#include "command.h"
	32	#include "symtab.h"
	33	#include "symfile.h" /* for struct complaint */
4e052eda	34	#include "regcache.h"
c906108c SS	35
	36	#include "gdb_string.h"
	37	#include <errno.h>
c906108c SS	38	#include <fcntl.h>
	39	#include <sys/types.h>
	40	#include <sys/time.h>
	41	#include <sys/socket.h>
	42
c5aa993b	43	#ifdef _AIX /* IBM claims "void malloc()" not char */
c906108c SS	44	#define malloc bogon_malloc
	45	#endif
	46
	47	#include <rpc/rpc.h>
	48	#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
	49	#include <netdb.h>
	50	#include "vx-share/ptrace.h"
	51	#include "vx-share/xdr_ptrace.h"
	52	#include "vx-share/xdr_ld.h"
	53	#include "vx-share/xdr_rdb.h"
	54	#include "vx-share/dbgRpcLib.h"
	55
	56	/* get rid of value.h if possible */
	57	#include <value.h>
	58	#include <symtab.h>
	59
	60	/* Flag set if target has fpu */
	61
	62	extern int target_has_fp;
	63
	64	/* sparc floating point format descriptor, from "sparc-tdep.c." */
	65
	66	extern struct ext_format ext_format_sparc;
	67
	68	/* Generic register read/write routines in remote-vx.c. */
	69
	70	extern void net_read_registers ();
	71	extern void net_write_registers ();
	72
	73	/* Read a register or registers from the VxWorks target.
	74	REGNO is the register to read, or -1 for all; currently,
	75	it is ignored. FIXME look at regno to improve efficiency. */
	76
	77	void
fba45db2	78	vx_read_register (int regno)
c906108c SS	79	{
	80	char sparc_greg_packet[SPARC_GREG_PLEN];
	81	char sparc_fpreg_packet[SPARC_FPREG_PLEN];
	82	CORE_ADDR sp;
	83
	84	/* Get general-purpose registers. When copying values into
	85	registers [], don't assume that a location in registers []
	86	is properly aligned for the target data type. */
	87
	88	net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);
	89
	90	/* Now copy the register values into registers[].
	91	Note that this code depends on the ordering of the REGNUMs
	92	as defined in "tm-sparc.h". */
	93
	94	bcopy (&sparc_greg_packet[SPARC_R_G0],
	95	&registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
	96	bcopy (&sparc_greg_packet[SPARC_R_Y],
	97	&registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
	98
	99	/* Now write the local and in registers to the register window
	100	spill area in the frame. VxWorks does not do this for the
	101	active frame automatically; it greatly simplifies debugging
	102	(FRAME_FIND_SAVED_REGS, in particular, depends on this). */
	103
c5aa993b JM	104	sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
c5aa993b JM	105	REGISTER_RAW_SIZE (CORE_ADDR));
c906108c SS	106	write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
	107	16 * REGISTER_RAW_SIZE (L0_REGNUM));
	108
	109	/* If the target has floating point registers, fetch them.
	110	Otherwise, zero the floating point register values in
	111	registers[] for good measure, even though we might not
	112	need to. */
	113
	114	if (target_has_fp)
	115	{
	116	net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
c5aa993b JM	117	PTRACE_GETFPREGS);
	118	bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
	119	&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
c906108c SS	120	bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
	121	&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
	122	}
	123	else
c5aa993b	124	{
c906108c SS	125	bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
	126	bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
	127	}
	128
	129	/* Mark the register cache valid. */
	130
	131	registers_fetched ();
	132	}
	133
	134	/* Store a register or registers into the VxWorks target.
	135	REGNO is the register to store, or -1 for all; currently,
	136	it is ignored. FIXME look at regno to improve efficiency. */
	137
	138	void
fba45db2	139	vx_write_register (int regno)
c906108c SS	140	{
	141	char sparc_greg_packet[SPARC_GREG_PLEN];
	142	char sparc_fpreg_packet[SPARC_FPREG_PLEN];
	143	int in_gp_regs;
	144	int in_fp_regs;
	145	CORE_ADDR sp;
	146
	147	/* Store general purpose registers. When copying values from
	148	registers [], don't assume that a location in registers []
	149	is properly aligned for the target data type. */
	150
	151	in_gp_regs = 1;
	152	in_fp_regs = 1;
	153	if (regno >= 0)
	154	{
	155	if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
c5aa993b	156	\|\| (Y_REGNUM <= regno && regno <= NPC_REGNUM))
c906108c SS	157	in_fp_regs = 0;
	158	else
	159	in_gp_regs = 0;
	160	}
	161	if (in_gp_regs)
	162	{
	163	bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
	164	&sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
	165	bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
	166	&sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
	167
	168	net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
	169
	170	/* If this is a local or in register, or we're storing all
	171	registers, update the register window spill area. */
	172
	173	if (regno < 0 \|\| (L0_REGNUM <= regno && regno <= I7_REGNUM))
c5aa993b JM	174	{
	175	sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
	176	REGISTER_RAW_SIZE (CORE_ADDR));
c906108c SS	177	write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
	178	16 * REGISTER_RAW_SIZE (L0_REGNUM));
	179	}
	180	}
	181
	182	/* Store floating point registers if the target has them. */
	183
	184	if (in_fp_regs && target_has_fp)
	185	{
c5aa993b	186	bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
c906108c	187	&sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
c5aa993b	188	bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
c906108c SS	189	&sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
	190
	191	net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
c5aa993b	192	PTRACE_SETFPREGS);
c906108c SS	193	}
c906108c SS	194	}