* remote.c: Make it work for embedded MIPS. Increase buffer
size, and use throughout. Round buffer size up if too many regs. Support baud rate setting and try for an 8-bit path. If interrupted while waiting for target, send a ^C down the wire. Avoid single-byte reads. * tm-mips.h: Add more embedded-system registers to REGISTER_NAMES and NUM_REGS. * mips-xdep.h: Avoid the embedded regs when on Unix.
This commit is contained in:
John Gilmore
parent
b621d05050
commit
b543979cda
4 changed files with 249 additions and 78 deletions
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@ -1,5 +1,14 @@
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Thu Feb 27 11:48:47 1992 John Gilmore (gnu at cygnus.com)
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* remote.c: Make it work for embedded MIPS. Increase buffer
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size, and use throughout. Round buffer size up if too many regs.
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Support baud rate setting and try for an 8-bit path. If
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interrupted while waiting for target, send a ^C down the wire.
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Avoid single-byte reads.
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* tm-mips.h: Add more embedded-system registers to REGISTER_NAMES
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and NUM_REGS.
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* mips-xdep.h: Avoid the embedded regs when on Unix.
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* mipsread.c: Byte-swap the symbol table structures, using
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routines from ecoff.c, to read a symbol table written in any
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of the four possible byte orders.
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@ -1,5 +1,5 @@
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/* Low level MIPS interface to ptrace, for GDB when running under Unix.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
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Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
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and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
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@ -144,7 +144,8 @@ store_inferior_registers (regno)
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{
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if (regno == ZERO_REGNUM || regno == PS_REGNUM
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|| regno == BADVADDR_REGNUM || regno == CAUSE_REGNUM
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|| regno == FCRIR_REGNUM || regno == FP_REGNUM)
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|| regno == FCRIR_REGNUM || regno == FP_REGNUM
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|| (regno >= FIRST_EMBED_REGNUM && regno <= LAST_EMBED_REGNUM))
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continue;
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regaddr = register_addr (regno, 1);
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errno = 0;
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300
gdb/remote.c
300
gdb/remote.c
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@ -1,21 +1,21 @@
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/* Memory-access and commands for inferior process, for GDB.
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Copyright (C) 1988-1991 Free Software Foundation, Inc.
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/* Remote target communications for serial-line targets in custom GDB protocol
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Copyright 1988, 1991, 1992 Free Software Foundation, Inc.
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This file is part of GDB.
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GDB is free software; you can redistribute it and/or modify
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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 1, or (at your option)
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any later version.
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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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GDB is distributed in the hope that it will be useful,
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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 GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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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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/* Remote communication protocol.
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All values are encoded in ascii hex digits.
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@ -70,7 +70,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <string.h>
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#include <fcntl.h>
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#include "defs.h"
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#include "param.h"
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#include "frame.h"
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#include "inferior.h"
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#include "target.h"
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@ -83,9 +82,62 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <signal.h>
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extern void add_syms_addr_command ();
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extern struct value *call_function_by_hand();
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extern void start_remote ();
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/* Prototypes for local functions */
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static void
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remote_write_bytes PARAMS ((CORE_ADDR, char *, int));
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static void
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remote_read_bytes PARAMS ((CORE_ADDR, char *, int));
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static void
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remote_files_info PARAMS ((struct target_ops *));
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static int
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remote_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
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static void
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remote_prepare_to_store PARAMS ((void));
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static void
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remote_fetch_registers PARAMS ((int));
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static void
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remote_resume PARAMS ((int, int));
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static void
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remote_open PARAMS ((char *, int));
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static void
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remote_close PARAMS ((int));
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static void
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remote_store_registers PARAMS ((int));
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static void
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getpkt PARAMS ((char *));
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static void
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putpkt PARAMS ((char *));
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static void
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remote_send PARAMS ((char *));
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static int
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readchar PARAMS ((void));
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static int
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remote_wait PARAMS ((WAITTYPE *));
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static int
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tohex PARAMS ((int));
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static int
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fromhex PARAMS ((int));
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static void
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remote_detach PARAMS ((char *, int));
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extern struct target_ops remote_ops; /* Forward decl */
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@ -101,19 +153,17 @@ int icache;
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starts. */
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int remote_desc = -1;
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#define PBUFSIZ 400
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#define PBUFSIZ 1024
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/* Maximum number of bytes to read/write at once. The value here
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is chosen to fill up a packet (the headers account for the 32). */
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#define MAXBUFBYTES ((PBUFSIZ-32)/2)
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static void remote_send ();
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static void putpkt ();
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static void getpkt ();
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#if 0
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static void dcache_flush ();
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/* Round up PBUFSIZ to hold all the registers, at least. */
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#if REGISTER_BYTES > MAXBUFBYTES
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#undef PBUFSIZ
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#define PBUFSIZ (REGISTER_BYTES * 2 + 32)
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#endif
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/* Called when SIGALRM signal sent due to alarm() timeout. */
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#ifndef HAVE_TERMIO
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@ -127,17 +177,10 @@ remote_timer ()
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}
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#endif
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/* Initialize remote connection */
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void
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remote_start()
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{
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}
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/* Clean up connection to a remote debugger. */
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/* ARGSUSED */
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void
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static void
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remote_close (quitting)
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int quitting;
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{
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@ -146,15 +189,58 @@ remote_close (quitting)
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remote_desc = -1;
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}
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/* Translate baud rates from integers to damn B_codes. Unix should
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have outgrown this crap years ago, but even POSIX wouldn't buck it. */
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#ifndef B19200
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#define B19200 EXTA
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#endif
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#ifndef B38400
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#define B38400 EXTB
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#endif
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static struct {int rate, damn_b;} baudtab[] = {
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{0, B0},
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{50, B50},
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{75, B75},
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{110, B110},
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{134, B134},
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{150, B150},
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{200, B200},
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{300, B300},
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{600, B600},
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{1200, B1200},
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{1800, B1800},
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{2400, B2400},
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{4800, B4800},
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{9600, B9600},
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{19200, B19200},
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{38400, B38400},
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{-1, -1},
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};
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static int
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damn_b (rate)
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int rate;
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{
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int i;
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for (i = 0; baudtab[i].rate != -1; i++)
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if (rate == baudtab[i].rate) return baudtab[i].damn_b;
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return B38400; /* Random */
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}
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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void
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static void
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remote_open (name, from_tty)
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char *name;
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int from_tty;
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{
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TERMINAL sg;
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int a_rate, b_rate;
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int baudrate_set = 0;
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if (name == 0)
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error (
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@ -173,13 +259,32 @@ device is attached to the remote system (e.g. /dev/ttya).");
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if (remote_desc < 0)
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perror_with_name (name);
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if (baud_rate)
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{
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if (1 != sscanf (baud_rate, "%d ", &a_rate))
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{
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b_rate = damn_b (a_rate);
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baudrate_set = 1;
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}
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}
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ioctl (remote_desc, TIOCGETP, &sg);
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#ifdef HAVE_TERMIO
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sg.c_cc[VMIN] = 0; /* read with timeout. */
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sg.c_cc[VTIME] = timeout * 10;
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sg.c_lflag &= ~(ICANON | ECHO);
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sg.c_cflag &= ~PARENB; /* No parity */
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sg.c_cflag |= CS8; /* 8-bit path */
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if (baudrate_set)
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sg.c_cflag = (sb.c_cflag & ~CBAUD) | b_rate;
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#else
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sg.sg_flags = RAW;
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sg.sg_flags |= RAW | ANYP;
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sg.sg_flags &= ~ECHO;
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if (baudrate_set)
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{
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sg.sg_ispeed = b_rate;
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sg.sg_ospeed = b_rate;
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}
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#endif
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ioctl (remote_desc, TIOCSETP, &sg);
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@ -256,7 +361,7 @@ tohex (nib)
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/* Tell the remote machine to resume. */
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void
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static void
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remote_resume (step, siggnal)
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int step, siggnal;
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{
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@ -274,19 +379,33 @@ remote_resume (step, siggnal)
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putpkt (buf);
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}
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/* Send ^C to target to halt it. Target will respond, and send us a
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packet. */
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void remote_interrupt()
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{
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write (remote_desc, "\003", 1); /* Send a ^C */
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}
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/* Wait until the remote machine stops, then return,
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storing status in STATUS just as `wait' would.
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Returns "pid" (though it's not clear what, if anything, that
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means in the case of this target). */
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int
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static int
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remote_wait (status)
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WAITTYPE *status;
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{
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unsigned char buf[PBUFSIZ];
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void (*ofunc)();
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WSETEXIT ((*status), 0);
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getpkt (buf);
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ofunc = signal (SIGINT, remote_interrupt);
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getpkt ((char *) buf);
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signal (SIGINT, ofunc);
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if (buf[0] == 'E')
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error ("Remote failure reply: %s", buf);
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if (buf[0] != 'S')
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@ -299,7 +418,7 @@ remote_wait (status)
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/* Currently we just read all the registers, so we don't use regno. */
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/* ARGSUSED */
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void
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static void
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remote_fetch_registers (regno)
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int regno;
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{
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@ -330,7 +449,7 @@ remote_fetch_registers (regno)
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/* Prepare to store registers. Since we send them all, we have to
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read out the ones we don't want to change first. */
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void
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static void
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remote_prepare_to_store ()
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{
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remote_fetch_registers (-1);
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@ -340,7 +459,7 @@ remote_prepare_to_store ()
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FIXME, eventually just store one register if that's all that is needed. */
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/* ARGSUSED */
|
||||
int
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static void
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remote_store_registers (regno)
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int regno;
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{
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|
|
@ -362,7 +481,6 @@ remote_store_registers (regno)
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*p = '\0';
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remote_send (buf);
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return 0;
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}
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#if 0
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|
|
@ -405,7 +523,7 @@ remote_store_word (addr, word)
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MYADDR is the address of the buffer in our space.
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LEN is the number of bytes. */
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void
|
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static void
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remote_write_bytes (memaddr, myaddr, len)
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CORE_ADDR memaddr;
|
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char *myaddr;
|
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|
|
@ -420,7 +538,7 @@ remote_write_bytes (memaddr, myaddr, len)
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sprintf (buf, "M%x,%x:", memaddr, len);
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/* Command describes registers byte by byte,
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||||
/* We send target system values byte by byte, in increasing byte addresses,
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each byte encoded as two hex characters. */
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p = buf + strlen (buf);
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|
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@ -440,7 +558,7 @@ remote_write_bytes (memaddr, myaddr, len)
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MYADDR is the address of the buffer in our space.
|
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LEN is the number of bytes. */
|
||||
|
||||
void
|
||||
static void
|
||||
remote_read_bytes (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
|
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char *myaddr;
|
||||
|
|
@ -456,7 +574,7 @@ remote_read_bytes (memaddr, myaddr, len)
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sprintf (buf, "m%x,%x", memaddr, len);
|
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remote_send (buf);
|
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|
||||
/* Reply describes registers byte by byte,
|
||||
/* Reply describes memory byte by byte,
|
||||
each byte encoded as two hex characters. */
|
||||
|
||||
p = buf;
|
||||
|
|
@ -473,12 +591,14 @@ remote_read_bytes (memaddr, myaddr, len)
|
|||
to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
|
||||
nonzero. Returns length of data written or read; 0 for error. */
|
||||
|
||||
int
|
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remote_xfer_inferior_memory(memaddr, myaddr, len, should_write)
|
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/* ARGSUSED */
|
||||
static int
|
||||
remote_xfer_memory(memaddr, myaddr, len, should_write, target)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
int should_write;
|
||||
struct target_ops *target; /* ignored */
|
||||
{
|
||||
int origlen = len;
|
||||
int xfersize;
|
||||
|
|
@ -500,8 +620,9 @@ remote_xfer_inferior_memory(memaddr, myaddr, len, should_write)
|
|||
return origlen; /* no error possible */
|
||||
}
|
||||
|
||||
void
|
||||
remote_files_info ()
|
||||
static void
|
||||
remote_files_info (target)
|
||||
struct target_ops *target;
|
||||
{
|
||||
printf ("remote files info missing here. FIXME.\n");
|
||||
}
|
||||
|
|
@ -527,22 +648,35 @@ Receiver responds with:
|
|||
|
||||
*/
|
||||
|
||||
/* Read a single character from the remote end.
|
||||
(If supported, we actually read many characters and buffer them up.) */
|
||||
|
||||
static int
|
||||
readchar ()
|
||||
{
|
||||
char buf;
|
||||
static int inbuf_index, inbuf_count;
|
||||
#define INBUFSIZE PBUFSIZ
|
||||
static char inbuf[INBUFSIZE];
|
||||
|
||||
buf = '\0';
|
||||
if (inbuf_index >= inbuf_count)
|
||||
{
|
||||
/* Time to do another read... */
|
||||
inbuf_index = 0;
|
||||
inbuf_count = 0;
|
||||
inbuf[0] = 0; /* Just in case */
|
||||
#ifdef HAVE_TERMIO
|
||||
/* termio does the timeout for us. */
|
||||
read (remote_desc, &buf, 1);
|
||||
/* termio does the timeout for us. */
|
||||
inbuf_count = read (remote_desc, inbuf, INBUFSIZE);
|
||||
#else
|
||||
alarm (timeout);
|
||||
read (remote_desc, &buf, 1);
|
||||
alarm (0);
|
||||
alarm (timeout);
|
||||
inbuf_count = read (remote_desc, inbuf, INBUFSIZE);
|
||||
alarm (0);
|
||||
#endif
|
||||
}
|
||||
|
||||
return buf & 0x7f;
|
||||
/* Just return the next character from the buffer. */
|
||||
return inbuf[inbuf_index++] & 0x7f;
|
||||
}
|
||||
|
||||
/* Send the command in BUF to the remote machine,
|
||||
|
|
@ -570,7 +704,7 @@ putpkt (buf)
|
|||
{
|
||||
int i;
|
||||
unsigned char csum = 0;
|
||||
char buf2[500];
|
||||
char buf2[PBUFSIZ];
|
||||
int cnt = strlen (buf);
|
||||
char ch;
|
||||
char *p;
|
||||
|
|
@ -578,6 +712,9 @@ putpkt (buf)
|
|||
/* Copy the packet into buffer BUF2, encapsulating it
|
||||
and giving it a checksum. */
|
||||
|
||||
if (cnt > sizeof(buf2) - 5) /* Prosanity check */
|
||||
abort();
|
||||
|
||||
p = buf2;
|
||||
*p++ = '$';
|
||||
|
||||
|
|
@ -827,24 +964,45 @@ dcache_init ()
|
|||
/* Define the target subroutine names */
|
||||
|
||||
struct target_ops remote_ops = {
|
||||
"remote", "Remote serial target in gdb-specific protocol",
|
||||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||||
Specify the serial device it is connected to (e.g. /dev/ttya).",
|
||||
remote_open, remote_close,
|
||||
0, remote_detach, remote_resume, remote_wait, /* attach */
|
||||
remote_fetch_registers, remote_store_registers,
|
||||
remote_prepare_to_store, 0, 0, /* conv_from, conv_to */
|
||||
remote_xfer_inferior_memory, remote_files_info,
|
||||
0, 0, /* insert_breakpoint, remove_breakpoint, */
|
||||
0, 0, 0, 0, 0, /* Terminal crud */
|
||||
0, /* kill */
|
||||
0, add_syms_addr_command, /* load */
|
||||
call_function_by_hand,
|
||||
0, /* lookup_symbol */
|
||||
0, 0, /* create_inferior FIXME, mourn_inferior FIXME */
|
||||
process_stratum, 0, /* next */
|
||||
1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
|
||||
OPS_MAGIC, /* Always the last thing */
|
||||
"remote", /* to_shortname */
|
||||
"Remote serial target in gdb-specific protocol", /* to_longname */
|
||||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||||
Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
|
||||
remote_open, /* to_open */
|
||||
remote_close, /* to_close */
|
||||
NULL, /* to_attach */
|
||||
remote_detach, /* to_detach */
|
||||
remote_resume, /* to_resume */
|
||||
remote_wait, /* to_wait */
|
||||
remote_fetch_registers, /* to_fetch_registers */
|
||||
remote_store_registers, /* to_store_registers */
|
||||
remote_prepare_to_store, /* to_prepare_to_store */
|
||||
NULL, /* to_convert_to_virtual */
|
||||
NULL, /* to_convert_from_virtual */
|
||||
remote_xfer_memory, /* to_xfer_memory */
|
||||
remote_files_info, /* to_files_info */
|
||||
NULL, /* to_insert_breakpoint */
|
||||
NULL, /* to_remove_breakpoint */
|
||||
NULL, /* to_terminal_init */
|
||||
NULL, /* to_terminal_inferior */
|
||||
NULL, /* to_terminal_ours_for_output */
|
||||
NULL, /* to_terminal_ours */
|
||||
NULL, /* to_terminal_info */
|
||||
NULL, /* to_kill */
|
||||
NULL, /* to_load */
|
||||
NULL, /* to_lookup_symbol */
|
||||
NULL, /* to_create_inferior */
|
||||
NULL, /* to_mourn_inferior */
|
||||
process_stratum, /* to_stratum */
|
||||
NULL, /* to_next */
|
||||
1, /* to_has_all_memory */
|
||||
1, /* to_has_memory */
|
||||
1, /* to_has_stack */
|
||||
1, /* to_has_registers */
|
||||
1, /* to_has_execution */
|
||||
NULL, /* sections */
|
||||
NULL, /* sections_end */
|
||||
OPS_MAGIC /* to_magic */
|
||||
};
|
||||
|
||||
void
|
||||
|
|
|
|||
|
|
@ -95,7 +95,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
|
||||
/* Number of machine registers */
|
||||
|
||||
#define NUM_REGS 73
|
||||
#define NUM_REGS 80
|
||||
|
||||
/* Initializer for an array of names of registers.
|
||||
There should be NUM_REGS strings in this initializer. */
|
||||
|
|
@ -107,10 +107,11 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", \
|
||||
"sr", "lo", "hi", "bad", "cause","pc", \
|
||||
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
|
||||
"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
|
||||
"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
|
||||
"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
|
||||
"fsr", "fir", "fp" \
|
||||
"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
|
||||
"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
|
||||
"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
|
||||
"fsr", "fir", "fp", "inx", "rand", "tlblo","ctxt", "tlbhi",\
|
||||
"epc", "prid"\
|
||||
}
|
||||
|
||||
/* Register numbers of various important registers.
|
||||
|
|
@ -134,6 +135,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
#define FCRCS_REGNUM 70 /* FP control/status */
|
||||
#define FCRIR_REGNUM 71 /* FP implementation/revision */
|
||||
#define FP_REGNUM 72 /* Pseudo register that contains true address of executing stack frame */
|
||||
#define FIRST_EMBED_REGNUM 73 /* First supervisor register for embedded use */
|
||||
#define LAST_EMBED_REGNUM 79 /* Last one */
|
||||
|
||||
/* Define DO_REGISTERS_INFO() to do machine-specific formatting
|
||||
of register dumps. */
|
||||
|
|
|
|||
Loading…
Reference in a new issue