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Diffstat (limited to 'gdb/remote-vxmips.c')
| -rw-r--r-- | gdb/remote-vxmips.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/gdb/remote-vxmips.c b/gdb/remote-vxmips.c new file mode 100644 index 0000000..b88f2ba --- /dev/null +++ b/gdb/remote-vxmips.c @@ -0,0 +1,229 @@ +/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <stdio.h> +#include "defs.h" + +#include "vx-share/regPacket.h" +#include "frame.h" +#include "inferior.h" +#include "wait.h" +#include "target.h" +#include "gdbcore.h" +#include "command.h" +#include "symtab.h" +#include "symfile.h" /* for struct complaint */ + +#include <string.h> +#include <errno.h> +#include <signal.h> +#include <fcntl.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <rpc/rpc.h> +#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */ +#include <netdb.h> +#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 <value.h> +#include <symtab.h> + +/* 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 (regno) + 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. */ + + bcopy (&mips_greg_packet[MIPS_R_GP0], ®isters[0], 32 * MIPS_GREG_SIZE); + + /* Copy SR, LO, HI, and PC. */ + + bcopy (&mips_greg_packet[MIPS_R_SR], + ®isters[REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE); + bcopy (&mips_greg_packet[MIPS_R_LO], + ®isters[REGISTER_BYTE (LO_REGNUM)], MIPS_GREG_SIZE); + bcopy (&mips_greg_packet[MIPS_R_HI], + ®isters[REGISTER_BYTE (HI_REGNUM)], MIPS_GREG_SIZE); + bcopy (&mips_greg_packet[MIPS_R_PC], + ®isters[REGISTER_BYTE (PC_REGNUM)], 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. */ + + bcopy (&mips_fpreg_packet[MIPS_R_FP0], + ®isters[REGISTER_BYTE (FP0_REGNUM)], + REGISTER_RAW_SIZE (FP0_REGNUM) * 32); + + /* Copy the floating point control/status register (fpcsr). */ + + bcopy (&mips_fpreg_packet[MIPS_R_FPCSR], + ®isters[REGISTER_BYTE (FCRCS_REGNUM)], + REGISTER_RAW_SIZE (FCRCS_REGNUM)); + } + else + { + bzero ((char *) ®isters[REGISTER_BYTE (FP0_REGNUM)], + REGISTER_RAW_SIZE (FP0_REGNUM) * 32); + bzero ((char *) ®isters[REGISTER_BYTE (FCRCS_REGNUM)], + REGISTER_RAW_SIZE (FCRCS_REGNUM)); + } + + /* Mark the register cache valid. */ + + 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 (regno) + int regno; +{ + char mips_greg_packet[MIPS_GREG_PLEN]; + char mips_fpreg_packet[MIPS_FPREG_PLEN]; + + /* Store general registers. */ + + bcopy (®isters[0], &mips_greg_packet[MIPS_R_GP0], 32 * MIPS_GREG_SIZE); + + /* Copy SR, LO, HI, and PC. */ + + bcopy (®isters[REGISTER_BYTE (PS_REGNUM)], + &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE); + bcopy (®isters[REGISTER_BYTE (LO_REGNUM)], + &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE); + bcopy (®isters[REGISTER_BYTE (HI_REGNUM)], + &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE); + bcopy (®isters[REGISTER_BYTE (PC_REGNUM)], + &mips_greg_packet[MIPS_R_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. */ + + bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], + &mips_fpreg_packet[MIPS_R_FP0], + REGISTER_RAW_SIZE (FP0_REGNUM) * 32); + + /* Copy the floating point control/status register (fpcsr). */ + + bcopy (®isters[REGISTER_BYTE (FCRCS_REGNUM)], + &mips_fpreg_packet[MIPS_R_FPCSR], + REGISTER_RAW_SIZE (FCRCS_REGNUM)); + + net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN, + PTRACE_SETFPREGS); + } +} + +/* Convert from an extended float to a double. + The extended float is stored as raw data pointed to by FROM. + Return the converted value as raw data in the double pointed to by TO. + NOTE: mips uses standard two word doubles. */ + +void +vx_convert_to_virtual (regno, from, to) + int regno; + char *from; + char *to; +{ + bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno)); +} + +/* The converse: convert from a double to an extended float. + The double is stored as raw data pointed to by FROM. + Return the converted value as raw data in the extended + float pointed to by TO. */ + +void +vx_convert_from_virtual (regno, from, to) + int regno; + char *from; + char *to; +{ + bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno)); +} |