/* MIPS-dependent portions of the RPC protocol used with a VxWorks target Contributed by Wind River Systems. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include "defs.h" #include "vx-share/regPacket.h" #include "frame.h" #include "inferior.h" #include "target.h" #include "gdbcore.h" #include "command.h" #include "symtab.h" #include "symfile.h" #include "regcache.h" #include "gdb_string.h" #include #include #include #include #include #include #include /* UTek's doesn't #incl this */ #include #include "vx-share/ptrace.h" #include "vx-share/xdr_ptrace.h" #include "vx-share/xdr_ld.h" #include "vx-share/xdr_rdb.h" #include "vx-share/dbgRpcLib.h" /* get rid of value.h if possible */ #include #include /* Flag set if target has fpu */ extern int target_has_fp; /* Generic register read/write routines in remote-vx.c. */ extern void net_read_registers (); extern void net_write_registers (); /* Read a register or registers from the VxWorks target. REGNO is the register to read, or -1 for all; currently, it is ignored. FIXME look at regno to improve efficiency. */ void vx_read_register (int regno) { char mips_greg_packet[MIPS_GREG_PLEN]; char mips_fpreg_packet[MIPS_FPREG_PLEN]; /* Get general-purpose registers. */ net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS); /* this code copies the registers obtained by RPC stored in a structure(s) like this : Register(s) Offset(s) gp 0-31 0x00 hi 0x80 lo 0x84 sr 0x88 pc 0x8c into a stucture like this: 0x00 GP 0-31 0x80 SR 0x84 LO 0x88 HI 0x8C BAD --- Not available currently 0x90 CAUSE --- Not available currently 0x94 PC 0x98 FP 0-31 0x118 FCSR 0x11C FIR --- Not available currently 0x120 FP --- Not available currently structure is 0x124 (292) bytes in length */ /* Copy the general registers. */ memcpy (&deprecated_registers[0], &mips_greg_packet[MIPS_R_GP0], 32 * MIPS_GREG_SIZE); /* Copy SR, LO, HI, and PC. */ memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE); memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE); memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE); memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], &mips_greg_packet[MIPS_R_PC], MIPS_GREG_SIZE); /* If the target has floating point registers, fetch them. Otherwise, zero the floating point register values in registers[] for good measure, even though we might not need to. */ if (target_has_fp) { net_read_registers (mips_fpreg_packet, MIPS_FPREG_PLEN, PTRACE_GETFPREGS); /* Copy the floating point registers. */ memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], &mips_fpreg_packet[MIPS_R_FP0], register_size (current_gdbarch, FP0_REGNUM) * 32); /* Copy the floating point control/status register (fpcsr). */ memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], &mips_fpreg_packet[MIPS_R_FPCSR], register_size (current_gdbarch, mips_regnum (current_gdbarch)->fp_control_status)); } else { memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], 0, register_size (current_gdbarch, FP0_REGNUM) * 32); memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], 0, register_size (current_gdbarch, mips_regnum (current_gdbarch)->fp_control_status)); } /* Mark the register cache valid. */ deprecated_registers_fetched (); } /* Store a register or registers into the VxWorks target. REGNO is the register to store, or -1 for all; currently, it is ignored. FIXME look at regno to improve efficiency. */ vx_write_register (int regno) { char mips_greg_packet[MIPS_GREG_PLEN]; char mips_fpreg_packet[MIPS_FPREG_PLEN]; /* Store general registers. */ memcpy (&mips_greg_packet[MIPS_R_GP0], &deprecated_registers[0], 32 * MIPS_GREG_SIZE); /* Copy SR, LO, HI, and PC. */ memcpy (&mips_greg_packet[MIPS_R_SR], &deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE); memcpy (&mips_greg_packet[MIPS_R_LO], &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], MIPS_GREG_SIZE); memcpy (&mips_greg_packet[MIPS_R_HI], &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], MIPS_GREG_SIZE); memcpy (&mips_greg_packet[MIPS_R_PC], &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], MIPS_GREG_SIZE); net_write_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_SETREGS); /* Store floating point registers if the target has them. */ if (target_has_fp) { /* Copy the floating point data registers. */ memcpy (&mips_fpreg_packet[MIPS_R_FP0], &deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], register_size (current_gdbarch, FP0_REGNUM) * 32); /* Copy the floating point control/status register (fpcsr). */ memcpy (&mips_fpreg_packet[MIPS_R_FPCSR], &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)], register_size (current_gdbarch, mips_regnum (current_gdbarch)->fp_control_status)); net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN, PTRACE_SETFPREGS); } }