| 1 | /* sparc-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., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include "defs.h" |
| 25 | |
| 26 | #include "vx-share/regPacket.h" |
| 27 | #include "frame.h" |
| 28 | #include "inferior.h" |
| 29 | #include "gdb_wait.h" |
| 30 | #include "target.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "command.h" |
| 33 | #include "symtab.h" |
| 34 | #include "symfile.h" /* for struct complaint */ |
| 35 | |
| 36 | #include "gdb_string.h" |
| 37 | #include <errno.h> |
| 38 | #include <signal.h> |
| 39 | #include <fcntl.h> |
| 40 | #include <sys/types.h> |
| 41 | #include <sys/time.h> |
| 42 | #include <sys/socket.h> |
| 43 | |
| 44 | #ifdef _AIX /* IBM claims "void *malloc()" not char * */ |
| 45 | #define malloc bogon_malloc |
| 46 | #endif |
| 47 | |
| 48 | #include <rpc/rpc.h> |
| 49 | #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */ |
| 50 | #include <netdb.h> |
| 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" |
| 56 | |
| 57 | /* get rid of value.h if possible */ |
| 58 | #include <value.h> |
| 59 | #include <symtab.h> |
| 60 | |
| 61 | /* Flag set if target has fpu */ |
| 62 | |
| 63 | extern int target_has_fp; |
| 64 | |
| 65 | /* sparc floating point format descriptor, from "sparc-tdep.c." */ |
| 66 | |
| 67 | extern struct ext_format ext_format_sparc; |
| 68 | |
| 69 | /* Generic register read/write routines in remote-vx.c. */ |
| 70 | |
| 71 | extern void net_read_registers (); |
| 72 | extern void net_write_registers (); |
| 73 | |
| 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. */ |
| 77 | |
| 78 | void |
| 79 | vx_read_register (int regno) |
| 80 | { |
| 81 | char sparc_greg_packet[SPARC_GREG_PLEN]; |
| 82 | char sparc_fpreg_packet[SPARC_FPREG_PLEN]; |
| 83 | CORE_ADDR sp; |
| 84 | |
| 85 | /* Get general-purpose registers. When copying values into |
| 86 | registers [], don't assume that a location in registers [] |
| 87 | is properly aligned for the target data type. */ |
| 88 | |
| 89 | net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS); |
| 90 | |
| 91 | /* Now copy the register values into registers[]. |
| 92 | Note that this code depends on the ordering of the REGNUMs |
| 93 | as defined in "tm-sparc.h". */ |
| 94 | |
| 95 | bcopy (&sparc_greg_packet[SPARC_R_G0], |
| 96 | ®isters[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE); |
| 97 | bcopy (&sparc_greg_packet[SPARC_R_Y], |
| 98 | ®isters[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE); |
| 99 | |
| 100 | /* Now write the local and in registers to the register window |
| 101 | spill area in the frame. VxWorks does not do this for the |
| 102 | active frame automatically; it greatly simplifies debugging |
| 103 | (FRAME_FIND_SAVED_REGS, in particular, depends on this). */ |
| 104 | |
| 105 | sp = extract_address (®isters[REGISTER_BYTE (SP_REGNUM)], |
| 106 | REGISTER_RAW_SIZE (CORE_ADDR)); |
| 107 | write_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)], |
| 108 | 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
| 109 | |
| 110 | /* If the target has floating point registers, fetch them. |
| 111 | Otherwise, zero the floating point register values in |
| 112 | registers[] for good measure, even though we might not |
| 113 | need to. */ |
| 114 | |
| 115 | if (target_has_fp) |
| 116 | { |
| 117 | net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN, |
| 118 | PTRACE_GETFPREGS); |
| 119 | bcopy (&sparc_fpreg_packet[SPARC_R_FP0], |
| 120 | ®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE); |
| 121 | bcopy (&sparc_fpreg_packet[SPARC_R_FSR], |
| 122 | ®isters[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE); |
| 123 | } |
| 124 | else |
| 125 | { |
| 126 | bzero (®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE); |
| 127 | bzero (®isters[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE); |
| 128 | } |
| 129 | |
| 130 | /* Mark the register cache valid. */ |
| 131 | |
| 132 | registers_fetched (); |
| 133 | } |
| 134 | |
| 135 | /* Store a register or registers into the VxWorks target. |
| 136 | REGNO is the register to store, or -1 for all; currently, |
| 137 | it is ignored. FIXME look at regno to improve efficiency. */ |
| 138 | |
| 139 | void |
| 140 | vx_write_register (int regno) |
| 141 | { |
| 142 | char sparc_greg_packet[SPARC_GREG_PLEN]; |
| 143 | char sparc_fpreg_packet[SPARC_FPREG_PLEN]; |
| 144 | int in_gp_regs; |
| 145 | int in_fp_regs; |
| 146 | CORE_ADDR sp; |
| 147 | |
| 148 | /* Store general purpose registers. When copying values from |
| 149 | registers [], don't assume that a location in registers [] |
| 150 | is properly aligned for the target data type. */ |
| 151 | |
| 152 | in_gp_regs = 1; |
| 153 | in_fp_regs = 1; |
| 154 | if (regno >= 0) |
| 155 | { |
| 156 | if ((G0_REGNUM <= regno && regno <= I7_REGNUM) |
| 157 | || (Y_REGNUM <= regno && regno <= NPC_REGNUM)) |
| 158 | in_fp_regs = 0; |
| 159 | else |
| 160 | in_gp_regs = 0; |
| 161 | } |
| 162 | if (in_gp_regs) |
| 163 | { |
| 164 | bcopy (®isters[REGISTER_BYTE (G0_REGNUM)], |
| 165 | &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE); |
| 166 | bcopy (®isters[REGISTER_BYTE (Y_REGNUM)], |
| 167 | &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE); |
| 168 | |
| 169 | net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS); |
| 170 | |
| 171 | /* If this is a local or in register, or we're storing all |
| 172 | registers, update the register window spill area. */ |
| 173 | |
| 174 | if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM)) |
| 175 | { |
| 176 | sp = extract_address (®isters[REGISTER_BYTE (SP_REGNUM)], |
| 177 | REGISTER_RAW_SIZE (CORE_ADDR)); |
| 178 | write_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)], |
| 179 | 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | /* Store floating point registers if the target has them. */ |
| 184 | |
| 185 | if (in_fp_regs && target_has_fp) |
| 186 | { |
| 187 | bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], |
| 188 | &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE); |
| 189 | bcopy (®isters[REGISTER_BYTE (FPS_REGNUM)], |
| 190 | &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE); |
| 191 | |
| 192 | net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN, |
| 193 | PTRACE_SETFPREGS); |
| 194 | } |
| 195 | } |