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240 lines
7.1 KiB
C
240 lines
7.1 KiB
C
/* sparc-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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/* sparc floating point format descriptor, from "sparc-tdep.c." */
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extern struct ext_format ext_format_sparc;
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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 sparc_greg_packet[SPARC_GREG_PLEN];
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char sparc_fpreg_packet[SPARC_FPREG_PLEN];
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CORE_ADDR sp;
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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 (sparc_greg_packet, SPARC_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-sparc.h". */
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bcopy (&sparc_greg_packet[SPARC_R_G0],
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®isters[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
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bcopy (&sparc_greg_packet[SPARC_R_Y],
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®isters[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
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/* Now write the local and in registers to the register window
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spill area in the frame. VxWorks does not do this for the
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active frame automatically; it greatly simplifies debugging
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(FRAME_FIND_SAVED_REGS, in particular, depends on this). */
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sp = extract_address (®isters[REGISTER_BYTE (SP_REGNUM)],
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REGISTER_RAW_SIZE (CORE_ADDR));
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write_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)],
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16 * REGISTER_RAW_SIZE (L0_REGNUM));
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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 (sparc_fpreg_packet, SPARC_FPREG_PLEN,
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PTRACE_GETFPREGS);
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bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
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®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
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bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
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®isters[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
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}
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else
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{
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bzero (®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
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bzero (®isters[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_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 sparc_greg_packet[SPARC_GREG_PLEN];
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char sparc_fpreg_packet[SPARC_FPREG_PLEN];
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int in_gp_regs;
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int in_fp_regs;
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CORE_ADDR sp;
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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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in_gp_regs = 1;
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in_fp_regs = 1;
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if (regno >= 0)
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{
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if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
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|| (Y_REGNUM <= regno && regno <= NPC_REGNUM))
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in_fp_regs = 0;
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else
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in_gp_regs = 0;
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}
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if (in_gp_regs)
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{
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bcopy (®isters[REGISTER_BYTE (G0_REGNUM)],
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&sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
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bcopy (®isters[REGISTER_BYTE (Y_REGNUM)],
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&sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
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net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
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/* If this is a local or in register, or we're storing all
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registers, update the register window spill area. */
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if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
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{
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sp = extract_address (®isters[REGISTER_BYTE (SP_REGNUM)],
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REGISTER_RAW_SIZE (CORE_ADDR));
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write_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)],
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16 * REGISTER_RAW_SIZE (L0_REGNUM));
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}
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}
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/* Store floating point registers if the target has them. */
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if (in_fp_regs && target_has_fp)
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{
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bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)],
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&sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
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bcopy (®isters[REGISTER_BYTE (FPS_REGNUM)],
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&sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
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net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
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PTRACE_SETFPREGS);
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}
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}
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/* Convert from an extended float to a double.
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The extended float is stored as raw data pointed to by FROM.
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Return the converted value as raw data in the double pointed to by TO. */
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void
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vx_convert_to_virtual (regno, from, to)
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int regno;
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char *from;
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char *to;
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{
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if (REGISTER_CONVERTIBLE (regno))
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{
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if (target_has_fp)
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ieee_extended_to_double (&ext_format_sparc, from, to);
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else
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bzero (to, sizeof (double));
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}
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else
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bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
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}
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/* The converse: convert from a double to an extended float.
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The double is stored as raw data pointed to by FROM.
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Return the converted value as raw data in the extended
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float pointed to by TO. */
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void
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vx_convert_from_virtual (regno, from, to)
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int regno;
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char *from;
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char *to;
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{
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if (REGISTER_CONVERTIBLE (regno))
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{
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if (target_has_fp)
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double_to_ieee_extended (&ext_format_sparc, from, to);
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else
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bzero (to, REGISTER_RAW_SIZE (FP0_REGNUM));
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}
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else
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bcopy (from, to, REGISTER_VIRTUAL_SIZE (regno));
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}
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