remote-vxmips.c revision 1.3
1/* MIPS-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 "target.h" 30#include "gdbcore.h" 31#include "command.h" 32#include "symtab.h" 33#include "symfile.h" 34#include "regcache.h" 35 36#include "gdb_string.h" 37#include <errno.h> 38#include <fcntl.h> 39#include <sys/types.h> 40#include <sys/time.h> 41#include <sys/socket.h> 42#include <rpc/rpc.h> 43#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */ 44#include <netdb.h> 45#include "vx-share/ptrace.h" 46#include "vx-share/xdr_ptrace.h" 47#include "vx-share/xdr_ld.h" 48#include "vx-share/xdr_rdb.h" 49#include "vx-share/dbgRpcLib.h" 50 51/* get rid of value.h if possible */ 52#include <value.h> 53#include <symtab.h> 54 55/* Flag set if target has fpu */ 56 57extern int target_has_fp; 58 59/* Generic register read/write routines in remote-vx.c. */ 60 61extern void net_read_registers (); 62extern void net_write_registers (); 63 64/* Read a register or registers from the VxWorks target. 65 REGNO is the register to read, or -1 for all; currently, 66 it is ignored. FIXME look at regno to improve efficiency. */ 67 68void 69vx_read_register (int regno) 70{ 71 char mips_greg_packet[MIPS_GREG_PLEN]; 72 char mips_fpreg_packet[MIPS_FPREG_PLEN]; 73 74 /* Get general-purpose registers. */ 75 76 net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS); 77 78 /* this code copies the registers obtained by RPC 79 stored in a structure(s) like this : 80 81 Register(s) Offset(s) 82 gp 0-31 0x00 83 hi 0x80 84 lo 0x84 85 sr 0x88 86 pc 0x8c 87 88 into a stucture like this: 89 90 0x00 GP 0-31 91 0x80 SR 92 0x84 LO 93 0x88 HI 94 0x8C BAD --- Not available currently 95 0x90 CAUSE --- Not available currently 96 0x94 PC 97 0x98 FP 0-31 98 0x118 FCSR 99 0x11C FIR --- Not available currently 100 0x120 FP --- Not available currently 101 102 structure is 0x124 (292) bytes in length */ 103 104 /* Copy the general registers. */ 105 106 bcopy (&mips_greg_packet[MIPS_R_GP0], &deprecated_registers[0], 107 32 * MIPS_GREG_SIZE); 108 109 /* Copy SR, LO, HI, and PC. */ 110 111 bcopy (&mips_greg_packet[MIPS_R_SR], 112 &deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE); 113 bcopy (&mips_greg_packet[MIPS_R_LO], 114 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], MIPS_GREG_SIZE); 115 bcopy (&mips_greg_packet[MIPS_R_HI], 116 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], MIPS_GREG_SIZE); 117 bcopy (&mips_greg_packet[MIPS_R_PC], 118 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], MIPS_GREG_SIZE); 119 120 /* If the target has floating point registers, fetch them. 121 Otherwise, zero the floating point register values in 122 registers[] for good measure, even though we might not 123 need to. */ 124 125 if (target_has_fp) 126 { 127 net_read_registers (mips_fpreg_packet, MIPS_FPREG_PLEN, 128 PTRACE_GETFPREGS); 129 130 /* Copy the floating point registers. */ 131 132 bcopy (&mips_fpreg_packet[MIPS_R_FP0], 133 &deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], 134 DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32); 135 136 /* Copy the floating point control/status register (fpcsr). */ 137 138 bcopy (&mips_fpreg_packet[MIPS_R_FPCSR], 139 &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], 140 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status)); 141 } 142 else 143 { 144 memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], 145 0, DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32); 146 memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], 147 0, DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status)); 148 } 149 150 /* Mark the register cache valid. */ 151 152 deprecated_registers_fetched (); 153} 154 155/* Store a register or registers into the VxWorks target. 156 REGNO is the register to store, or -1 for all; currently, 157 it is ignored. FIXME look at regno to improve efficiency. */ 158 159vx_write_register (int regno) 160{ 161 char mips_greg_packet[MIPS_GREG_PLEN]; 162 char mips_fpreg_packet[MIPS_FPREG_PLEN]; 163 164 /* Store general registers. */ 165 166 bcopy (&deprecated_registers[0], &mips_greg_packet[MIPS_R_GP0], 167 32 * MIPS_GREG_SIZE); 168 169 /* Copy SR, LO, HI, and PC. */ 170 171 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], 172 &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE); 173 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], 174 &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE); 175 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], 176 &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE); 177 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], 178 &mips_greg_packet[MIPS_R_PC], MIPS_GREG_SIZE); 179 180 net_write_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_SETREGS); 181 182 /* Store floating point registers if the target has them. */ 183 184 if (target_has_fp) 185 { 186 /* Copy the floating point data registers. */ 187 188 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], 189 &mips_fpreg_packet[MIPS_R_FP0], 190 DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32); 191 192 /* Copy the floating point control/status register (fpcsr). */ 193 194 bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], 195 &mips_fpreg_packet[MIPS_R_FPCSR], 196 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status)); 197 198 net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN, 199 PTRACE_SETFPREGS); 200 } 201} 202