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/* Am29k-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 "gdb_wait.h"
#include "target.h"
#include "gdbcore.h"
#include "command.h"
#include "symtab.h"
#include "symfile.h" /* for struct complaint */
#include "gdb_string.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#ifdef _AIX /* IBM claims "void *malloc()" not char * */
#define malloc bogon_malloc
#endif
#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 am29k_greg_packet[AM29K_GREG_PLEN];
char am29k_fpreg_packet[AM29K_FPREG_PLEN];
/* Get general-purpose registers. When copying values into
registers [], don't assume that a location in registers []
is properly aligned for the target data type. */
net_read_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_GETREGS);
/* Now copy the register values into registers[].
Note that this code depends on the ordering of the REGNUMs
as defined in "tm-29k.h". */
bcopy (&am29k_greg_packet[AM29K_R_GR96],
®isters[REGISTER_BYTE (GR96_REGNUM)], 160 * AM29K_GREG_SIZE);
bcopy (&am29k_greg_packet[AM29K_R_VAB],
®isters[REGISTER_BYTE (VAB_REGNUM)], 15 * AM29K_GREG_SIZE);
registers[REGISTER_BYTE (INTE_REGNUM)] = am29k_greg_packet[AM29K_R_INTE];
bcopy (&am29k_greg_packet[AM29K_R_RSP],
®isters[REGISTER_BYTE (GR1_REGNUM)], 5 * AM29K_GREG_SIZE);
/* PAD For now, don't care about exop register */
memset (®isters[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_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 (am29k_fpreg_packet, AM29K_FPREG_PLEN,
PTRACE_GETFPREGS);
registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE];
registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS];
/* PAD For now, don't care about registers (?) AI0 to q */
memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
}
else
{
memset (®isters[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);
memset (®isters[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);
/* PAD For now, don't care about registers (?) AI0 to q */
memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
}
/* 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. */
void
vx_write_register (int regno)
{
char am29k_greg_packet[AM29K_GREG_PLEN];
char am29k_fpreg_packet[AM29K_FPREG_PLEN];
/* Store general purpose registers. When copying values from
registers [], don't assume that a location in registers []
is properly aligned for the target data type. */
bcopy (®isters[REGISTER_BYTE (GR96_REGNUM)],
&am29k_greg_packet[AM29K_R_GR96], 160 * AM29K_GREG_SIZE);
bcopy (®isters[REGISTER_BYTE (VAB_REGNUM)],
&am29k_greg_packet[AM29K_R_VAB], 15 * AM29K_GREG_SIZE);
am29k_greg_packet[AM29K_R_INTE] = registers[REGISTER_BYTE (INTE_REGNUM)];
bcopy (®isters[REGISTER_BYTE (GR1_REGNUM)],
&am29k_greg_packet[AM29K_R_RSP], 5 * AM29K_GREG_SIZE);
net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS);
/* Store floating point registers if the target has them. */
if (target_has_fp)
{
am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)];
am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)];
net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
PTRACE_SETFPREGS);
}
}
/* VxWorks zeroes fp when the task is initialized; we use this
to terminate the frame chain. Chain means here the nominal address of
a frame, that is, the return address (lr0) address in the stack. To
obtain the frame pointer (lr1) contents, we must add 4 bytes.
Note : may be we should modify init_frame_info() to get the frame pointer
and store it into the frame_info struct rather than reading its
contents when FRAME_CHAIN_VALID is invoked. THISFRAME is unused. */
int
vx29k_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
{
int fp_contents;
read_memory ((CORE_ADDR) (chain + 4), (char *) &fp_contents, 4);
return (fp_contents != 0);
}
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