161520dc02
* remote-vx.c: move read_register and write_register out to
target specific files.
* remote-vx29k.c (get_fp_contnets): add this function, from WRS.
189 lines
6.1 KiB
C
189 lines
6.1 KiB
C
/* Am29k-dependent portions of the RPC protocol
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used with a VxWorks target
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Contributed by Wind River Systems.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "defs.h"
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#include "vx-share/regPacket.h"
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#include "frame.h"
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#include "inferior.h"
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#include "wait.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "symtab.h"
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#include "symfile.h" /* for struct complaint */
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#ifdef _AIX /* IBM claims "void *malloc()" not char * */
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#define malloc bogon_malloc
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#endif
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#include <rpc/rpc.h>
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#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
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#include <netdb.h>
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#include "vx-share/ptrace.h"
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#include "vx-share/xdr_ptrace.h"
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#include "vx-share/xdr_ld.h"
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#include "vx-share/xdr_rdb.h"
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#include "vx-share/dbgRpcLib.h"
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/* get rid of value.h if possible */
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#include <value.h>
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#include <symtab.h>
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/* Flag set if target has fpu */
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extern int target_has_fp;
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/* Generic register read/write routines in remote-vx.c. */
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extern void net_read_registers ();
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extern void net_write_registers ();
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/* Read a register or registers from the VxWorks target.
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REGNO is the register to read, or -1 for all; currently,
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it is ignored. FIXME look at regno to improve efficiency. */
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void
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vx_read_register (regno)
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int regno;
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{
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char am29k_greg_packet[AM29K_GREG_PLEN];
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char am29k_fpreg_packet[AM29K_FPREG_PLEN];
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/* Get general-purpose registers. When copying values into
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registers [], don't assume that a location in registers []
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is properly aligned for the target data type. */
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net_read_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_GETREGS);
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/* Now copy the register values into registers[].
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Note that this code depends on the ordering of the REGNUMs
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as defined in "tm-29k.h". */
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bcopy (&am29k_greg_packet[AM29K_R_GR96],
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®isters[REGISTER_BYTE (GR96_REGNUM)], 160 * AM29K_GREG_SIZE);
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bcopy (&am29k_greg_packet[AM29K_R_VAB],
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®isters[REGISTER_BYTE (VAB_REGNUM)], 15 * AM29K_GREG_SIZE);
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registers[REGISTER_BYTE (INTE_REGNUM)] = am29k_greg_packet[AM29K_R_INTE];
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bcopy (&am29k_greg_packet[AM29K_R_RSP],
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®isters[REGISTER_BYTE (GR1_REGNUM)], 5 * AM29K_GREG_SIZE);
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/* PAD For now, don't care about exop register */
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memset (®isters[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE);
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/* If the target has floating point registers, fetch them.
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Otherwise, zero the floating point register values in
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registers[] for good measure, even though we might not
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need to. */
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if (target_has_fp)
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{
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net_read_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
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PTRACE_GETFPREGS);
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registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE];
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registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS];
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/* PAD For now, don't care about registers (?) AI0 to q */
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memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
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}
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else
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{
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memset (®isters[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);
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memset (®isters[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);
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/* PAD For now, don't care about registers (?) AI0 to q */
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memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
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}
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/* Mark the register cache valid. */
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registers_fetched ();
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}
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/* Store a register or registers into the VxWorks target.
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REGNO is the register to store, or -1 for all; currently,
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it is ignored. FIXME look at regno to improve efficiency. */
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void
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vx_write_register (regno)
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int regno;
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{
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char am29k_greg_packet[AM29K_GREG_PLEN];
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char am29k_fpreg_packet[AM29K_FPREG_PLEN];
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/* Store general purpose registers. When copying values from
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registers [], don't assume that a location in registers []
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is properly aligned for the target data type. */
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bcopy (®isters[REGISTER_BYTE (GR96_REGNUM)],
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&am29k_greg_packet[AM29K_R_GR96], 160 * AM29K_GREG_SIZE);
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bcopy (®isters[REGISTER_BYTE (VAB_REGNUM)],
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&am29k_greg_packet[AM29K_R_VAB], 15 * AM29K_GREG_SIZE);
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am29k_greg_packet[AM29K_R_INTE] = registers[REGISTER_BYTE (INTE_REGNUM)];
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bcopy (®isters[REGISTER_BYTE (GR1_REGNUM)],
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&am29k_greg_packet[AM29K_R_RSP], 5 * AM29K_GREG_SIZE);
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net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS);
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/* Store floating point registers if the target has them. */
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if (target_has_fp)
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{
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am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)];
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am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)];
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net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
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PTRACE_SETFPREGS);
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}
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}
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/* VxWorks zeroes fp when the task is initialized; we use this
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to terminate the frame chain. Chain means here the nominal address of
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a frame, that is, the return address (lr0) address in the stack. To
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obtain the frame pointer (lr1) contents, we must add 4 bytes.
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Note : may be we should modify init_frame_info() to get the frame pointer
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and store it into the frame_info struct rather than reading its
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contents when FRAME_CHAIN_VALID is invoked. */
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int
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get_fp_contents (chain, thisframe)
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CORE_ADDR chain;
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struct frame_info *thisframe; /* not used here */
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{
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int fp_contents;
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read_memory ((CORE_ADDR)(chain + 4), (char *) &fp_contents, 4);
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return (fp_contents != 0);
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}
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