1 /* Am29k-dependent portions of the RPC protocol
2 used with a VxWorks target
4 Contributed by Wind River Systems.
6 This file is part of GDB.
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.
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.
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, Boston, MA 02111-1307, USA. */
25 #include "vx-share/regPacket.h"
33 #include "symfile.h" /* for struct complaint */
35 #include "gdb_string.h"
39 #include <sys/types.h>
41 #include <sys/socket.h>
43 #ifdef _AIX /* IBM claims "void *malloc()" not char * */
44 #define malloc bogon_malloc
48 #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
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"
56 /* get rid of value.h if possible */
60 /* Flag set if target has fpu */
62 extern int target_has_fp
;
64 /* Generic register read/write routines in remote-vx.c. */
66 extern void net_read_registers ();
67 extern void net_write_registers ();
69 /* Read a register or registers from the VxWorks target.
70 REGNO is the register to read, or -1 for all; currently,
71 it is ignored. FIXME look at regno to improve efficiency. */
74 vx_read_register (regno
)
77 char am29k_greg_packet
[AM29K_GREG_PLEN
];
78 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
80 /* Get general-purpose registers. When copying values into
81 registers [], don't assume that a location in registers []
82 is properly aligned for the target data type. */
84 net_read_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_GETREGS
);
86 /* Now copy the register values into registers[].
87 Note that this code depends on the ordering of the REGNUMs
88 as defined in "tm-29k.h". */
90 bcopy (&am29k_greg_packet
[AM29K_R_GR96
],
91 ®isters
[REGISTER_BYTE (GR96_REGNUM
)], 160 * AM29K_GREG_SIZE
);
92 bcopy (&am29k_greg_packet
[AM29K_R_VAB
],
93 ®isters
[REGISTER_BYTE (VAB_REGNUM
)], 15 * AM29K_GREG_SIZE
);
94 registers
[REGISTER_BYTE (INTE_REGNUM
)] = am29k_greg_packet
[AM29K_R_INTE
];
95 bcopy (&am29k_greg_packet
[AM29K_R_RSP
],
96 ®isters
[REGISTER_BYTE (GR1_REGNUM
)], 5 * AM29K_GREG_SIZE
);
98 /* PAD For now, don't care about exop register */
100 memset (®isters
[REGISTER_BYTE (EXO_REGNUM
)], '\0', AM29K_GREG_SIZE
);
102 /* If the target has floating point registers, fetch them.
103 Otherwise, zero the floating point register values in
104 registers[] for good measure, even though we might not
109 net_read_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
111 registers
[REGISTER_BYTE (FPE_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPE
];
112 registers
[REGISTER_BYTE (FPS_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPS
];
114 /* PAD For now, don't care about registers (?) AI0 to q */
116 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
120 memset (®isters
[REGISTER_BYTE (FPE_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
121 memset (®isters
[REGISTER_BYTE (FPS_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
123 /* PAD For now, don't care about registers (?) AI0 to q */
125 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
128 /* Mark the register cache valid. */
130 registers_fetched ();
133 /* Store a register or registers into the VxWorks target.
134 REGNO is the register to store, or -1 for all; currently,
135 it is ignored. FIXME look at regno to improve efficiency. */
138 vx_write_register (regno
)
141 char am29k_greg_packet
[AM29K_GREG_PLEN
];
142 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
144 /* Store general purpose registers. When copying values from
145 registers [], don't assume that a location in registers []
146 is properly aligned for the target data type. */
148 bcopy (®isters
[REGISTER_BYTE (GR96_REGNUM
)],
149 &am29k_greg_packet
[AM29K_R_GR96
], 160 * AM29K_GREG_SIZE
);
150 bcopy (®isters
[REGISTER_BYTE (VAB_REGNUM
)],
151 &am29k_greg_packet
[AM29K_R_VAB
], 15 * AM29K_GREG_SIZE
);
152 am29k_greg_packet
[AM29K_R_INTE
] = registers
[REGISTER_BYTE (INTE_REGNUM
)];
153 bcopy (®isters
[REGISTER_BYTE (GR1_REGNUM
)],
154 &am29k_greg_packet
[AM29K_R_RSP
], 5 * AM29K_GREG_SIZE
);
156 net_write_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_SETREGS
);
158 /* Store floating point registers if the target has them. */
162 am29k_fpreg_packet
[AM29K_R_FPE
] = registers
[REGISTER_BYTE (FPE_REGNUM
)];
163 am29k_fpreg_packet
[AM29K_R_FPS
] = registers
[REGISTER_BYTE (FPS_REGNUM
)];
165 net_write_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
170 /* VxWorks zeroes fp when the task is initialized; we use this
171 to terminate the frame chain. Chain means here the nominal address of
172 a frame, that is, the return address (lr0) address in the stack. To
173 obtain the frame pointer (lr1) contents, we must add 4 bytes.
174 Note : may be we should modify init_frame_info() to get the frame pointer
175 and store it into the frame_info struct rather than reading its
176 contents when FRAME_CHAIN_VALID is invoked. */
179 vx29k_frame_chain_valid (chain
, thisframe
)
181 struct frame_info
*thisframe
; /* not used here */
185 read_memory ((CORE_ADDR
)(chain
+ 4), (char *) &fp_contents
, 4);
186 return (fp_contents
!= 0);
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