1 /* Am29k-dependent portions of the RPC protocol
3 Contributed by Wind River Systems.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "vx-share/regPacket.h"
32 #include "symfile.h" /* for struct complaint */
34 #include "gdb_string.h"
37 #include <sys/types.h>
39 #include <sys/socket.h>
41 #ifdef _AIX /* IBM claims "void *malloc()" not char * */
42 #define malloc bogon_malloc
46 #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
48 #include "vx-share/ptrace.h"
49 #include "vx-share/xdr_ptrace.h"
50 #include "vx-share/xdr_ld.h"
51 #include "vx-share/xdr_rdb.h"
52 #include "vx-share/dbgRpcLib.h"
54 /* get rid of value.h if possible */
58 /* Flag set if target has fpu */
60 extern int target_has_fp
;
62 /* Generic register read/write routines in remote-vx.c. */
64 extern void net_read_registers ();
65 extern void net_write_registers ();
67 /* Read a register or registers from the VxWorks target.
68 REGNO is the register to read, or -1 for all; currently,
69 it is ignored. FIXME look at regno to improve efficiency. */
72 vx_read_register (int regno
)
74 char am29k_greg_packet
[AM29K_GREG_PLEN
];
75 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
77 /* Get general-purpose registers. When copying values into
78 registers [], don't assume that a location in registers []
79 is properly aligned for the target data type. */
81 net_read_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_GETREGS
);
83 /* Now copy the register values into registers[].
84 Note that this code depends on the ordering of the REGNUMs
85 as defined in "tm-29k.h". */
87 bcopy (&am29k_greg_packet
[AM29K_R_GR96
],
88 ®isters
[REGISTER_BYTE (GR96_REGNUM
)], 160 * AM29K_GREG_SIZE
);
89 bcopy (&am29k_greg_packet
[AM29K_R_VAB
],
90 ®isters
[REGISTER_BYTE (VAB_REGNUM
)], 15 * AM29K_GREG_SIZE
);
91 registers
[REGISTER_BYTE (INTE_REGNUM
)] = am29k_greg_packet
[AM29K_R_INTE
];
92 bcopy (&am29k_greg_packet
[AM29K_R_RSP
],
93 ®isters
[REGISTER_BYTE (GR1_REGNUM
)], 5 * AM29K_GREG_SIZE
);
95 /* PAD For now, don't care about exop register */
97 memset (®isters
[REGISTER_BYTE (EXO_REGNUM
)], '\0', AM29K_GREG_SIZE
);
99 /* If the target has floating point registers, fetch them.
100 Otherwise, zero the floating point register values in
101 registers[] for good measure, even though we might not
106 net_read_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
108 registers
[REGISTER_BYTE (FPE_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPE
];
109 registers
[REGISTER_BYTE (FPS_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPS
];
111 /* PAD For now, don't care about registers (?) AI0 to q */
113 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
117 memset (®isters
[REGISTER_BYTE (FPE_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
118 memset (®isters
[REGISTER_BYTE (FPS_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
120 /* PAD For now, don't care about registers (?) AI0 to q */
122 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
125 /* Mark the register cache valid. */
127 registers_fetched ();
130 /* Store a register or registers into the VxWorks target.
131 REGNO is the register to store, or -1 for all; currently,
132 it is ignored. FIXME look at regno to improve efficiency. */
135 vx_write_register (int regno
)
137 char am29k_greg_packet
[AM29K_GREG_PLEN
];
138 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
140 /* Store general purpose registers. When copying values from
141 registers [], don't assume that a location in registers []
142 is properly aligned for the target data type. */
144 bcopy (®isters
[REGISTER_BYTE (GR96_REGNUM
)],
145 &am29k_greg_packet
[AM29K_R_GR96
], 160 * AM29K_GREG_SIZE
);
146 bcopy (®isters
[REGISTER_BYTE (VAB_REGNUM
)],
147 &am29k_greg_packet
[AM29K_R_VAB
], 15 * AM29K_GREG_SIZE
);
148 am29k_greg_packet
[AM29K_R_INTE
] = registers
[REGISTER_BYTE (INTE_REGNUM
)];
149 bcopy (®isters
[REGISTER_BYTE (GR1_REGNUM
)],
150 &am29k_greg_packet
[AM29K_R_RSP
], 5 * AM29K_GREG_SIZE
);
152 net_write_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_SETREGS
);
154 /* Store floating point registers if the target has them. */
158 am29k_fpreg_packet
[AM29K_R_FPE
] = registers
[REGISTER_BYTE (FPE_REGNUM
)];
159 am29k_fpreg_packet
[AM29K_R_FPS
] = registers
[REGISTER_BYTE (FPS_REGNUM
)];
161 net_write_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
166 /* VxWorks zeroes fp when the task is initialized; we use this
167 to terminate the frame chain. Chain means here the nominal address of
168 a frame, that is, the return address (lr0) address in the stack. To
169 obtain the frame pointer (lr1) contents, we must add 4 bytes.
170 Note : may be we should modify init_frame_info() to get the frame pointer
171 and store it into the frame_info struct rather than reading its
172 contents when FRAME_CHAIN_VALID is invoked. THISFRAME is unused. */
175 vx29k_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
)
179 read_memory ((CORE_ADDR
) (chain
+ 4), (char *) &fp_contents
, 4);
180 return (fp_contents
!= 0);
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