| 1 | /* Am29k-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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include "defs.h" |
| 24 | |
| 25 | #include "vx-share/regPacket.h" |
| 26 | #include "frame.h" |
| 27 | #include "inferior.h" |
| 28 | #include "wait.h" |
| 29 | #include "target.h" |
| 30 | #include "gdbcore.h" |
| 31 | #include "command.h" |
| 32 | #include "symtab.h" |
| 33 | #include "symfile.h" /* for struct complaint */ |
| 34 | |
| 35 | #include <string.h> |
| 36 | #include <errno.h> |
| 37 | #include <signal.h> |
| 38 | #include <fcntl.h> |
| 39 | #include <sys/types.h> |
| 40 | #include <sys/time.h> |
| 41 | #include <sys/socket.h> |
| 42 | |
| 43 | #ifdef _AIX /* IBM claims "void *malloc()" not char * */ |
| 44 | #define malloc bogon_malloc |
| 45 | #endif |
| 46 | |
| 47 | #include <rpc/rpc.h> |
| 48 | #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */ |
| 49 | #include <netdb.h> |
| 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" |
| 55 | |
| 56 | /* get rid of value.h if possible */ |
| 57 | #include <value.h> |
| 58 | #include <symtab.h> |
| 59 | |
| 60 | /* Flag set if target has fpu */ |
| 61 | |
| 62 | extern int target_has_fp; |
| 63 | |
| 64 | /* Generic register read/write routines in remote-vx.c. */ |
| 65 | |
| 66 | extern void net_read_registers (); |
| 67 | extern void net_write_registers (); |
| 68 | |
| 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. */ |
| 72 | |
| 73 | void |
| 74 | vx_read_register (regno) |
| 75 | int regno; |
| 76 | { |
| 77 | char am29k_greg_packet[AM29K_GREG_PLEN]; |
| 78 | char am29k_fpreg_packet[AM29K_FPREG_PLEN]; |
| 79 | |
| 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. */ |
| 83 | |
| 84 | net_read_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_GETREGS); |
| 85 | |
| 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". */ |
| 89 | |
| 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); |
| 97 | |
| 98 | /* PAD For now, don't care about exop register */ |
| 99 | |
| 100 | memset (®isters[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE); |
| 101 | |
| 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 |
| 105 | need to. */ |
| 106 | |
| 107 | if (target_has_fp) |
| 108 | { |
| 109 | net_read_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN, |
| 110 | PTRACE_GETFPREGS); |
| 111 | registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE]; |
| 112 | registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS]; |
| 113 | |
| 114 | /* PAD For now, don't care about registers (?) AI0 to q */ |
| 115 | |
| 116 | memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE); |
| 117 | } |
| 118 | else |
| 119 | { |
| 120 | memset (®isters[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE); |
| 121 | memset (®isters[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE); |
| 122 | |
| 123 | /* PAD For now, don't care about registers (?) AI0 to q */ |
| 124 | |
| 125 | memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE); |
| 126 | } |
| 127 | |
| 128 | /* Mark the register cache valid. */ |
| 129 | |
| 130 | registers_fetched (); |
| 131 | } |
| 132 | |
| 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. */ |
| 136 | |
| 137 | void |
| 138 | vx_write_register (regno) |
| 139 | int regno; |
| 140 | { |
| 141 | char am29k_greg_packet[AM29K_GREG_PLEN]; |
| 142 | char am29k_fpreg_packet[AM29K_FPREG_PLEN]; |
| 143 | |
| 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. */ |
| 147 | |
| 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); |
| 155 | |
| 156 | net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS); |
| 157 | |
| 158 | /* Store floating point registers if the target has them. */ |
| 159 | |
| 160 | if (target_has_fp) |
| 161 | { |
| 162 | am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)]; |
| 163 | am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)]; |
| 164 | |
| 165 | net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN, |
| 166 | PTRACE_SETFPREGS); |
| 167 | } |
| 168 | } |
| 169 | |
| 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. */ |
| 177 | |
| 178 | int |
| 179 | get_fp_contents (chain, thisframe) |
| 180 | CORE_ADDR chain; |
| 181 | struct frame_info *thisframe; /* not used here */ |
| 182 | { |
| 183 | int fp_contents; |
| 184 | |
| 185 | read_memory ((CORE_ADDR)(chain + 4), (char *) &fp_contents, 4); |
| 186 | return (fp_contents != 0); |
| 187 | } |
| 188 | |