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| Current File : //usr/src/contrib/gdb/gdb/remote-vxmips.c |
/* 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 <stdio.h>
#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 <errno.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 (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], &deprecated_registers[0],
32 * MIPS_GREG_SIZE);
/* Copy SR, LO, HI, and PC. */
bcopy (&mips_greg_packet[MIPS_R_SR],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE);
bcopy (&mips_greg_packet[MIPS_R_LO],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], MIPS_GREG_SIZE);
bcopy (&mips_greg_packet[MIPS_R_HI],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], MIPS_GREG_SIZE);
bcopy (&mips_greg_packet[MIPS_R_PC],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->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. */
bcopy (&mips_fpreg_packet[MIPS_R_FP0],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
/* Copy the floating point control/status register (fpcsr). */
bcopy (&mips_fpreg_packet[MIPS_R_FPCSR],
&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status));
}
else
{
memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
0, DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
0, DEPRECATED_REGISTER_RAW_SIZE (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. */
bcopy (&deprecated_registers[0], &mips_greg_packet[MIPS_R_GP0],
32 * MIPS_GREG_SIZE);
/* Copy SR, LO, HI, and PC. */
bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)],
&mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE);
bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)],
&mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE);
bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)],
&mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE);
bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)],
&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 (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
&mips_fpreg_packet[MIPS_R_FP0],
DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) * 32);
/* Copy the floating point control/status register (fpcsr). */
bcopy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)],
&mips_fpreg_packet[MIPS_R_FPCSR],
DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->fp_control_status));
net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,
PTRACE_SETFPREGS);
}
}