1 /* sparc-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,
21 Boston, MA 02111-1307, USA. */
26 #include "vx-share/regPacket.h"
34 #include "symfile.h" /* for struct complaint */
36 #include "gdb_string.h"
40 #include <sys/types.h>
42 #include <sys/socket.h>
44 #ifdef _AIX /* IBM claims "void *malloc()" not char * */
45 #define malloc bogon_malloc
49 #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
51 #include "vx-share/ptrace.h"
52 #include "vx-share/xdr_ptrace.h"
53 #include "vx-share/xdr_ld.h"
54 #include "vx-share/xdr_rdb.h"
55 #include "vx-share/dbgRpcLib.h"
57 /* get rid of value.h if possible */
61 /* Flag set if target has fpu */
63 extern int target_has_fp
;
65 /* sparc floating point format descriptor, from "sparc-tdep.c." */
67 extern struct ext_format ext_format_sparc
;
69 /* Generic register read/write routines in remote-vx.c. */
71 extern void net_read_registers ();
72 extern void net_write_registers ();
74 /* Read a register or registers from the VxWorks target.
75 REGNO is the register to read, or -1 for all; currently,
76 it is ignored. FIXME look at regno to improve efficiency. */
79 vx_read_register (regno
)
82 char sparc_greg_packet
[SPARC_GREG_PLEN
];
83 char sparc_fpreg_packet
[SPARC_FPREG_PLEN
];
86 /* Get general-purpose registers. When copying values into
87 registers [], don't assume that a location in registers []
88 is properly aligned for the target data type. */
90 net_read_registers (sparc_greg_packet
, SPARC_GREG_PLEN
, PTRACE_GETREGS
);
92 /* Now copy the register values into registers[].
93 Note that this code depends on the ordering of the REGNUMs
94 as defined in "tm-sparc.h". */
96 bcopy (&sparc_greg_packet
[SPARC_R_G0
],
97 ®isters
[REGISTER_BYTE (G0_REGNUM
)], 32 * SPARC_GREG_SIZE
);
98 bcopy (&sparc_greg_packet
[SPARC_R_Y
],
99 ®isters
[REGISTER_BYTE (Y_REGNUM
)], 6 * SPARC_GREG_SIZE
);
101 /* Now write the local and in registers to the register window
102 spill area in the frame. VxWorks does not do this for the
103 active frame automatically; it greatly simplifies debugging
104 (FRAME_FIND_SAVED_REGS, in particular, depends on this). */
106 sp
= extract_address (®isters
[REGISTER_BYTE (SP_REGNUM
)],
107 REGISTER_RAW_SIZE (CORE_ADDR
));
108 write_memory (sp
, ®isters
[REGISTER_BYTE (L0_REGNUM
)],
109 16 * REGISTER_RAW_SIZE (L0_REGNUM
));
111 /* If the target has floating point registers, fetch them.
112 Otherwise, zero the floating point register values in
113 registers[] for good measure, even though we might not
118 net_read_registers (sparc_fpreg_packet
, SPARC_FPREG_PLEN
,
120 bcopy (&sparc_fpreg_packet
[SPARC_R_FP0
],
121 ®isters
[REGISTER_BYTE (FP0_REGNUM
)], 32 * SPARC_FPREG_SIZE
);
122 bcopy (&sparc_fpreg_packet
[SPARC_R_FSR
],
123 ®isters
[REGISTER_BYTE (FPS_REGNUM
)], 1 * SPARC_FPREG_SIZE
);
127 bzero (®isters
[REGISTER_BYTE (FP0_REGNUM
)], 32 * SPARC_FPREG_SIZE
);
128 bzero (®isters
[REGISTER_BYTE (FPS_REGNUM
)], 1 * SPARC_FPREG_SIZE
);
131 /* Mark the register cache valid. */
133 registers_fetched ();
136 /* Store a register or registers into the VxWorks target.
137 REGNO is the register to store, or -1 for all; currently,
138 it is ignored. FIXME look at regno to improve efficiency. */
141 vx_write_register (regno
)
144 char sparc_greg_packet
[SPARC_GREG_PLEN
];
145 char sparc_fpreg_packet
[SPARC_FPREG_PLEN
];
150 /* Store general purpose registers. When copying values from
151 registers [], don't assume that a location in registers []
152 is properly aligned for the target data type. */
158 if ((G0_REGNUM
<= regno
&& regno
<= I7_REGNUM
)
159 || (Y_REGNUM
<= regno
&& regno
<= NPC_REGNUM
))
166 bcopy (®isters
[REGISTER_BYTE (G0_REGNUM
)],
167 &sparc_greg_packet
[SPARC_R_G0
], 32 * SPARC_GREG_SIZE
);
168 bcopy (®isters
[REGISTER_BYTE (Y_REGNUM
)],
169 &sparc_greg_packet
[SPARC_R_Y
], 6 * SPARC_GREG_SIZE
);
171 net_write_registers (sparc_greg_packet
, SPARC_GREG_PLEN
, PTRACE_SETREGS
);
173 /* If this is a local or in register, or we're storing all
174 registers, update the register window spill area. */
176 if (regno
< 0 || (L0_REGNUM
<= regno
&& regno
<= I7_REGNUM
))
178 sp
= extract_address (®isters
[REGISTER_BYTE (SP_REGNUM
)],
179 REGISTER_RAW_SIZE (CORE_ADDR
));
180 write_memory (sp
, ®isters
[REGISTER_BYTE (L0_REGNUM
)],
181 16 * REGISTER_RAW_SIZE (L0_REGNUM
));
185 /* Store floating point registers if the target has them. */
187 if (in_fp_regs
&& target_has_fp
)
189 bcopy (®isters
[REGISTER_BYTE (FP0_REGNUM
)],
190 &sparc_fpreg_packet
[SPARC_R_FP0
], 32 * SPARC_FPREG_SIZE
);
191 bcopy (®isters
[REGISTER_BYTE (FPS_REGNUM
)],
192 &sparc_fpreg_packet
[SPARC_R_FSR
], 1 * SPARC_FPREG_SIZE
);
194 net_write_registers (sparc_fpreg_packet
, SPARC_FPREG_PLEN
,