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
20   Foundation, Inc., 59 Temple Place - Suite 330,
21   Boston, MA 02111-1307, USA.  */
22
23#include <stdio.h>
24#include "defs.h"
25
26#include "vx-share/regPacket.h"
27#include "frame.h"
28#include "inferior.h"
29#include "target.h"
30#include "gdbcore.h"
31#include "command.h"
32#include "symtab.h"
33#include "symfile.h"
34#include "regcache.h"
35
36#include "gdb_string.h"
37#include <errno.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
57extern int target_has_fp;
58
59/* Generic register read/write routines in remote-vx.c.  */
60
61extern void net_read_registers ();
62extern 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
68void
69vx_read_register (int regno)
70{
71  char mips_greg_packet[MIPS_GREG_PLEN];
72  char mips_fpreg_packet[MIPS_FPREG_PLEN];
73
74  /* Get general-purpose registers.  */
75
76  net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS);
77
78  /* this code copies the registers obtained by RPC
79     stored in a structure(s) like this :
80
81     Register(s)                Offset(s)
82     gp 0-31                    0x00
83     hi                 0x80
84     lo                 0x84
85     sr                 0x88
86     pc                 0x8c
87
88     into a stucture like this:
89
90     0x00       GP 0-31
91     0x80       SR
92     0x84       LO
93     0x88       HI
94     0x8C       BAD             --- Not available currently
95     0x90       CAUSE           --- Not available currently
96     0x94       PC
97     0x98       FP 0-31
98     0x118      FCSR
99     0x11C      FIR             --- Not available currently
100     0x120      FP              --- Not available currently
101
102     structure is 0x124 (292) bytes in length */
103
104  /* Copy the general registers.  */
105
106  bcopy (&mips_greg_packet[MIPS_R_GP0], &deprecated_registers[0],
107	 32 * MIPS_GREG_SIZE);
108
109  /* Copy SR, LO, HI, and PC.  */
110
111  bcopy (&mips_greg_packet[MIPS_R_SR],
112	 &deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE);
113  bcopy (&mips_greg_packet[MIPS_R_LO],
114	 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], MIPS_GREG_SIZE);
115  bcopy (&mips_greg_packet[MIPS_R_HI],
116	 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], MIPS_GREG_SIZE);
117  bcopy (&mips_greg_packet[MIPS_R_PC],
118	 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], 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	     &deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
134	     DEPRECATED_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	     &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
140	     DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status));
141    }
142  else
143    {
144      memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
145	      0, DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
146      memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
147	      0, DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status));
148    }
149
150  /* Mark the register cache valid.  */
151
152  deprecated_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
159vx_write_register (int regno)
160{
161  char mips_greg_packet[MIPS_GREG_PLEN];
162  char mips_fpreg_packet[MIPS_FPREG_PLEN];
163
164  /* Store general registers.  */
165
166  bcopy (&deprecated_registers[0], &mips_greg_packet[MIPS_R_GP0],
167	 32 * MIPS_GREG_SIZE);
168
169  /* Copy SR, LO, HI, and PC.  */
170
171  bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)],
172	 &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE);
173  bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)],
174	 &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE);
175  bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)],
176	 &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE);
177  bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)],
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 (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
189	     &mips_fpreg_packet[MIPS_R_FP0],
190	     DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
191
192      /* Copy the floating point control/status register (fpcsr).  */
193
194      bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
195	     &mips_fpreg_packet[MIPS_R_FPCSR],
196	     DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status));
197
198      net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
199			   PTRACE_SETFPREGS);
200    }
201}
202