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,
21 Boston, MA 02111-1307, USA. */
26 #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 (int regno)
76 char am29k_greg_packet[AM29K_GREG_PLEN];
77 char am29k_fpreg_packet[AM29K_FPREG_PLEN];
79 /* Get general-purpose registers. When copying values into
80 registers [], don't assume that a location in registers []
81 is properly aligned for the target data type. */
83 net_read_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_GETREGS);
85 /* Now copy the register values into registers[].
86 Note that this code depends on the ordering of the REGNUMs
87 as defined in "tm-29k.h". */
89 bcopy (&am29k_greg_packet[AM29K_R_GR96],
90 ®isters[REGISTER_BYTE (GR96_REGNUM)], 160 * AM29K_GREG_SIZE);
91 bcopy (&am29k_greg_packet[AM29K_R_VAB],
92 ®isters[REGISTER_BYTE (VAB_REGNUM)], 15 * AM29K_GREG_SIZE);
93 registers[REGISTER_BYTE (INTE_REGNUM)] = am29k_greg_packet[AM29K_R_INTE];
94 bcopy (&am29k_greg_packet[AM29K_R_RSP],
95 ®isters[REGISTER_BYTE (GR1_REGNUM)], 5 * AM29K_GREG_SIZE);
97 /* PAD For now, don't care about exop register */
99 memset (®isters[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE);
101 /* If the target has floating point registers, fetch them.
102 Otherwise, zero the floating point register values in
103 registers[] for good measure, even though we might not
108 net_read_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
110 registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE];
111 registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS];
113 /* PAD For now, don't care about registers (?) AI0 to q */
115 memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
119 memset (®isters[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);
120 memset (®isters[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);
122 /* PAD For now, don't care about registers (?) AI0 to q */
124 memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
127 /* Mark the register cache valid. */
129 registers_fetched ();
132 /* Store a register or registers into the VxWorks target.
133 REGNO is the register to store, or -1 for all; currently,
134 it is ignored. FIXME look at regno to improve efficiency. */
137 vx_write_register (int regno)
139 char am29k_greg_packet[AM29K_GREG_PLEN];
140 char am29k_fpreg_packet[AM29K_FPREG_PLEN];
142 /* Store general purpose registers. When copying values from
143 registers [], don't assume that a location in registers []
144 is properly aligned for the target data type. */
146 bcopy (®isters[REGISTER_BYTE (GR96_REGNUM)],
147 &am29k_greg_packet[AM29K_R_GR96], 160 * AM29K_GREG_SIZE);
148 bcopy (®isters[REGISTER_BYTE (VAB_REGNUM)],
149 &am29k_greg_packet[AM29K_R_VAB], 15 * AM29K_GREG_SIZE);
150 am29k_greg_packet[AM29K_R_INTE] = registers[REGISTER_BYTE (INTE_REGNUM)];
151 bcopy (®isters[REGISTER_BYTE (GR1_REGNUM)],
152 &am29k_greg_packet[AM29K_R_RSP], 5 * AM29K_GREG_SIZE);
154 net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS);
156 /* Store floating point registers if the target has them. */
160 am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)];
161 am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)];
163 net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
168 /* VxWorks zeroes fp when the task is initialized; we use this
169 to terminate the frame chain. Chain means here the nominal address of
170 a frame, that is, the return address (lr0) address in the stack. To
171 obtain the frame pointer (lr1) contents, we must add 4 bytes.
172 Note : may be we should modify init_frame_info() to get the frame pointer
173 and store it into the frame_info struct rather than reading its
174 contents when FRAME_CHAIN_VALID is invoked. THISFRAME is unused. */
177 vx29k_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
181 read_memory ((CORE_ADDR) (chain + 4), (char *) &fp_contents, 4);
182 return (fp_contents != 0);