+++ /dev/null
-/* Remote target communications for serial-line targets using SDS' protocol.
-
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2006 Free Software
- Foundation, Inc.
-
- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
-/* This interface was written by studying the behavior of the SDS
- monitor on an ADS 821/860 board, and by consulting the
- documentation of the monitor that is available on Motorola's web
- site. -sts 8/13/97 */
-
-#include "defs.h"
-#include "gdb_string.h"
-#include <fcntl.h>
-#include "frame.h"
-#include "inferior.h"
-#include "exceptions.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "target.h"
-#include "gdbcmd.h"
-#include "objfiles.h"
-#include "gdb-stabs.h"
-#include "gdbthread.h"
-#include "gdbcore.h"
-#include "regcache.h"
-
-#include <signal.h>
-#include "serial.h"
-
-extern void _initialize_remote_sds (void);
-
-/* Declarations of local functions. */
-
-static int sds_write_bytes (CORE_ADDR, char *, int);
-
-static int sds_read_bytes (CORE_ADDR, char *, int);
-
-static void sds_files_info (struct target_ops *ignore);
-
-static int sds_xfer_memory (CORE_ADDR, char *, int, int,
- struct mem_attrib *, struct target_ops *);
-
-static void sds_prepare_to_store (void);
-
-static void sds_fetch_registers (int);
-
-static void sds_resume (ptid_t, int, enum target_signal);
-
-static int sds_start_remote (void *);
-
-static void sds_open (char *, int);
-
-static void sds_close (int);
-
-static void sds_store_registers (int);
-
-static void sds_mourn (void);
-
-static void sds_load (char *, int);
-
-static int getmessage (unsigned char *, int);
-
-static int putmessage (unsigned char *, int);
-
-static int sds_send (unsigned char *, int);
-
-static int readchar (int);
-
-static ptid_t sds_wait (ptid_t, struct target_waitstatus *);
-
-static void sds_kill (void);
-
-static int fromhex (int);
-
-static void sds_detach (char *, int);
-
-static void sds_interrupt (int);
-
-static void sds_interrupt_twice (int);
-
-static void interrupt_query (void);
-
-static int read_frame (char *);
-
-static void init_sds_ops (void);
-
-static void sds_command (char *args, int from_tty);
-
-/* Define the target operations vector. */
-
-static struct target_ops sds_ops;
-
-/* This was 5 seconds, which is a long time to sit and wait.
- Unless this is going though some terminal server or multiplexer or
- other form of hairy serial connection, I would think 2 seconds would
- be plenty. */
-
-static int sds_timeout = 2;
-
-/* Descriptor for I/O to remote machine. Initialize it to NULL so
- that sds_open knows that we don't have a file open when the program
- starts. */
-
-static struct serial *sds_desc = NULL;
-
-/* This limit comes from the monitor. */
-
-#define PBUFSIZ 250
-
-/* Maximum number of bytes to read/write at once. The value here
- is chosen to fill up a packet (the headers account for the 32). */
-#define MAXBUFBYTES ((PBUFSIZ-32)/2)
-
-static int next_msg_id;
-
-static int just_started;
-
-static int message_pending;
-\f
-
-/* Clean up connection to a remote debugger. */
-
-static void
-sds_close (int quitting)
-{
- if (sds_desc)
- serial_close (sds_desc);
- sds_desc = NULL;
-}
-
-/* Stub for catch_errors. */
-
-static int
-sds_start_remote (void *from_tty_p)
-{
- int from_tty = * (int *) from_tty;
- int c;
- unsigned char buf[200];
-
- immediate_quit++; /* Allow user to interrupt it */
-
- /* Ack any packet which the remote side has already sent. */
- serial_write (sds_desc, "{#*\r\n", 5);
- serial_write (sds_desc, "{#}\r\n", 5);
-
- while ((c = readchar (1)) >= 0)
- printf_unfiltered ("%c", c);
- printf_unfiltered ("\n");
-
- next_msg_id = 251;
-
- buf[0] = 26;
- sds_send (buf, 1);
-
- buf[0] = 0;
- sds_send (buf, 1);
-
- immediate_quit--;
-
- start_remote (from_tty); /* Initialize gdb process mechanisms */
- return 1;
-}
-
-/* Open a connection to a remote debugger.
- NAME is the filename used for communication. */
-
-static void
-sds_open (char *name, int from_tty)
-{
- if (name == 0)
- error ("To open a remote debug connection, you need to specify what serial\n\
-device is attached to the remote system (e.g. /dev/ttya).");
-
- target_preopen (from_tty);
-
- unpush_target (&sds_ops);
-
- sds_desc = serial_open (name);
- if (!sds_desc)
- perror_with_name (name);
-
- if (baud_rate != -1)
- {
- if (serial_setbaudrate (sds_desc, baud_rate))
- {
- serial_close (sds_desc);
- perror_with_name (name);
- }
- }
-
-
- serial_raw (sds_desc);
-
- /* If there is something sitting in the buffer we might take it as a
- response to a command, which would be bad. */
- serial_flush_input (sds_desc);
-
- if (from_tty)
- {
- puts_filtered ("Remote debugging using ");
- puts_filtered (name);
- puts_filtered ("\n");
- }
- push_target (&sds_ops); /* Switch to using remote target now */
-
- just_started = 1;
-
- /* Start the remote connection; if error (0), discard this target.
- In particular, if the user quits, be sure to discard it (we'd be
- in an inconsistent state otherwise). */
- if (!catch_errors (sds_start_remote, &from_tty,
- "Couldn't establish connection to remote target\n",
- RETURN_MASK_ALL))
- pop_target ();
-}
-
-/* This takes a program previously attached to and detaches it. After
- this is done, GDB can be used to debug some other program. We
- better not have left any breakpoints in the target program or it'll
- die when it hits one. */
-
-static void
-sds_detach (char *args, int from_tty)
-{
- char buf[PBUFSIZ];
-
- if (args)
- error ("Argument given to \"detach\" when remotely debugging.");
-
-#if 0
- /* Tell the remote target to detach. */
- strcpy (buf, "D");
- sds_send (buf, 1);
-#endif
-
- pop_target ();
- if (from_tty)
- puts_filtered ("Ending remote debugging.\n");
-}
-
-/* Convert hex digit A to a number. */
-
-static int
-fromhex (int a)
-{
- if (a >= '0' && a <= '9')
- return a - '0';
- else if (a >= 'a' && a <= 'f')
- return a - 'a' + 10;
- else
- error ("Reply contains invalid hex digit %d", a);
-}
-
-static int
-tob64 (unsigned char *inbuf, char *outbuf, int len)
-{
- int i, sum;
- char *p;
-
- if (len % 3 != 0)
- error ("bad length");
-
- p = outbuf;
- for (i = 0; i < len; i += 3)
- {
- /* Collect the next three bytes into a number. */
- sum = ((long) *inbuf++) << 16;
- sum |= ((long) *inbuf++) << 8;
- sum |= ((long) *inbuf++);
-
- /* Spit out 4 6-bit encodings. */
- *p++ = ((sum >> 18) & 0x3f) + '0';
- *p++ = ((sum >> 12) & 0x3f) + '0';
- *p++ = ((sum >> 6) & 0x3f) + '0';
- *p++ = (sum & 0x3f) + '0';
- }
- return (p - outbuf);
-}
-
-static int
-fromb64 (char *inbuf, char *outbuf, int len)
-{
- int i, sum;
-
- if (len % 4 != 0)
- error ("bad length");
-
- for (i = 0; i < len; i += 4)
- {
- /* Collect 4 6-bit digits. */
- sum = (*inbuf++ - '0') << 18;
- sum |= (*inbuf++ - '0') << 12;
- sum |= (*inbuf++ - '0') << 6;
- sum |= (*inbuf++ - '0');
-
- /* Now take the resulting 24-bit number and get three bytes out
- of it. */
- *outbuf++ = (sum >> 16) & 0xff;
- *outbuf++ = (sum >> 8) & 0xff;
- *outbuf++ = sum & 0xff;
- }
-
- return (len / 4) * 3;
-}
-\f
-
-/* Tell the remote machine to resume. */
-
-static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
-int last_sent_step;
-
-static void
-sds_resume (ptid_t ptid, int step, enum target_signal siggnal)
-{
- unsigned char buf[PBUFSIZ];
-
- last_sent_signal = siggnal;
- last_sent_step = step;
-
- buf[0] = (step ? 21 : 20);
- buf[1] = 0; /* (should be signal?) */
-
- sds_send (buf, 2);
-}
-\f
-/* Send a message to target to halt it. Target will respond, and send
- us a message pending notice. */
-
-static void
-sds_interrupt (int signo)
-{
- unsigned char buf[PBUFSIZ];
-
- /* If this doesn't work, try more severe steps. */
- signal (signo, sds_interrupt_twice);
-
- if (remote_debug)
- fprintf_unfiltered (gdb_stdlog, "sds_interrupt called\n");
-
- buf[0] = 25;
- sds_send (buf, 1);
-}
-
-static void (*ofunc) ();
-
-/* The user typed ^C twice. */
-
-static void
-sds_interrupt_twice (int signo)
-{
- signal (signo, ofunc);
-
- interrupt_query ();
-
- signal (signo, sds_interrupt);
-}
-
-/* Ask the user what to do when an interrupt is received. */
-
-static void
-interrupt_query (void)
-{
- target_terminal_ours ();
-
- if (query ("Interrupted while waiting for the program.\n\
-Give up (and stop debugging it)? "))
- {
- target_mourn_inferior ();
- deprecated_throw_reason (RETURN_QUIT);
- }
-
- target_terminal_inferior ();
-}
-
-/* If nonzero, ignore the next kill. */
-int kill_kludge;
-
-/* Wait until the remote machine stops, then return, storing status in
- STATUS just as `wait' would. Returns "pid" (though it's not clear
- what, if anything, that means in the case of this target). */
-
-static ptid_t
-sds_wait (ptid_t ptid, struct target_waitstatus *status)
-{
- unsigned char buf[PBUFSIZ];
- int retlen;
-
- status->kind = TARGET_WAITKIND_EXITED;
- status->value.integer = 0;
-
- ofunc = (void (*)()) signal (SIGINT, sds_interrupt);
-
- signal (SIGINT, ofunc);
-
- if (just_started)
- {
- just_started = 0;
- status->kind = TARGET_WAITKIND_STOPPED;
- return inferior_ptid;
- }
-
- while (1)
- {
- getmessage (buf, 1);
-
- if (message_pending)
- {
- buf[0] = 26;
- retlen = sds_send (buf, 1);
- if (remote_debug)
- {
- fprintf_unfiltered (gdb_stdlog, "Signals: %02x%02x %02x %02x\n",
- buf[0], buf[1],
- buf[2], buf[3]);
- }
- message_pending = 0;
- status->kind = TARGET_WAITKIND_STOPPED;
- status->value.sig = TARGET_SIGNAL_TRAP;
- goto got_status;
- }
- }
-got_status:
- return inferior_ptid;
-}
-
-static unsigned char sprs[16];
-
-/* Read the remote registers into the block REGS. */
-/* Currently we just read all the registers, so we don't use regno. */
-
-static void
-sds_fetch_registers (int regno)
-{
- unsigned char buf[PBUFSIZ];
- int i, retlen;
- char *regs = alloca (deprecated_register_bytes ());
-
- /* Unimplemented registers read as all bits zero. */
- memset (regs, 0, deprecated_register_bytes ());
-
- buf[0] = 18;
- buf[1] = 1;
- buf[2] = 0;
- retlen = sds_send (buf, 3);
-
- for (i = 0; i < 4 * 6; ++i)
- regs[i + 4 * 32 + 8 * 32] = buf[i];
- for (i = 0; i < 4 * 4; ++i)
- sprs[i] = buf[i + 4 * 7];
-
- buf[0] = 18;
- buf[1] = 2;
- buf[2] = 0;
- retlen = sds_send (buf, 3);
-
- for (i = 0; i < retlen; i++)
- regs[i] = buf[i];
-
- /* (should warn about reply too short) */
-
- for (i = 0; i < NUM_REGS; i++)
- regcache_raw_supply (current_regcache, i,
- ®s[DEPRECATED_REGISTER_BYTE (i)]);
-}
-
-/* Prepare to store registers. Since we may send them all, we have to
- read out the ones we don't want to change first. */
-
-static void
-sds_prepare_to_store (void)
-{
- /* Make sure the entire registers array is valid. */
- deprecated_read_register_bytes (0, (char *) NULL, deprecated_register_bytes ());
-}
-
-/* Store register REGNO, or all registers if REGNO == -1, from the contents
- of REGISTERS. FIXME: ignores errors. */
-
-static void
-sds_store_registers (int regno)
-{
- unsigned char *p, buf[PBUFSIZ];
- int i;
-
- /* Store all the special-purpose registers. */
- p = buf;
- *p++ = 19;
- *p++ = 1;
- *p++ = 0;
- *p++ = 0;
- for (i = 0; i < 4 * 6; i++)
- *p++ = deprecated_registers[i + 4 * 32 + 8 * 32];
- for (i = 0; i < 4 * 1; i++)
- *p++ = 0;
- for (i = 0; i < 4 * 4; i++)
- *p++ = sprs[i];
-
- sds_send (buf, p - buf);
-
- /* Store all the general-purpose registers. */
- p = buf;
- *p++ = 19;
- *p++ = 2;
- *p++ = 0;
- *p++ = 0;
- for (i = 0; i < 4 * 32; i++)
- *p++ = deprecated_registers[i];
-
- sds_send (buf, p - buf);
-
-}
-\f
-/* Write memory data directly to the remote machine. This does not
- inform the data cache; the data cache uses this. MEMADDR is the
- address in the remote memory space. MYADDR is the address of the
- buffer in our space. LEN is the number of bytes.
-
- Returns number of bytes transferred, or 0 for error. */
-
-static int
-sds_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
-{
- int max_buf_size; /* Max size of packet output buffer */
- int origlen;
- unsigned char buf[PBUFSIZ];
- int todo;
- int i;
-
- /* Chop the transfer down if necessary */
-
- max_buf_size = 150;
-
- origlen = len;
- while (len > 0)
- {
- todo = min (len, max_buf_size);
-
- buf[0] = 13;
- buf[1] = 0;
- buf[2] = (int) (memaddr >> 24) & 0xff;
- buf[3] = (int) (memaddr >> 16) & 0xff;
- buf[4] = (int) (memaddr >> 8) & 0xff;
- buf[5] = (int) (memaddr) & 0xff;
- buf[6] = 1;
- buf[7] = 0;
-
- for (i = 0; i < todo; i++)
- buf[i + 8] = myaddr[i];
-
- sds_send (buf, 8 + todo);
-
- /* (should look at result) */
-
- myaddr += todo;
- memaddr += todo;
- len -= todo;
- }
- return origlen;
-}
-
-/* Read memory data directly from the remote machine. This does not
- use the data cache; the data cache uses this. MEMADDR is the
- address in the remote memory space. MYADDR is the address of the
- buffer in our space. LEN is the number of bytes.
-
- Returns number of bytes transferred, or 0 for error. */
-
-static int
-sds_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
-{
- int max_buf_size; /* Max size of packet output buffer */
- int origlen, retlen;
- unsigned char buf[PBUFSIZ];
- int todo;
- int i;
-
- /* Chop the transfer down if necessary */
-
- max_buf_size = 150;
-
- origlen = len;
- while (len > 0)
- {
- todo = min (len, max_buf_size);
-
- buf[0] = 12;
- buf[1] = 0;
- buf[2] = (int) (memaddr >> 24) & 0xff;
- buf[3] = (int) (memaddr >> 16) & 0xff;
- buf[4] = (int) (memaddr >> 8) & 0xff;
- buf[5] = (int) (memaddr) & 0xff;
- buf[6] = (int) (todo >> 8) & 0xff;
- buf[7] = (int) (todo) & 0xff;
- buf[8] = 1;
-
- retlen = sds_send (buf, 9);
-
- if (retlen - 2 != todo)
- {
- return 0;
- }
-
- /* Reply describes memory byte by byte. */
-
- for (i = 0; i < todo; i++)
- myaddr[i] = buf[i + 2];
-
- myaddr += todo;
- memaddr += todo;
- len -= todo;
- }
-
- return origlen;
-}
-\f
-/* Read or write LEN bytes from inferior memory at MEMADDR,
- transferring to or from debugger address MYADDR. Write to inferior
- if SHOULD_WRITE is nonzero. Returns length of data written or
- read; 0 for error. TARGET is unused. */
-
-static int
-sds_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int should_write,
- struct mem_attrib *attrib, struct target_ops *target)
-{
- int res;
-
- if (should_write)
- res = sds_write_bytes (memaddr, myaddr, len);
- else
- res = sds_read_bytes (memaddr, myaddr, len);
-
- return res;
-}
-\f
-
-static void
-sds_files_info (struct target_ops *ignore)
-{
- puts_filtered ("Debugging over a serial connection, using SDS protocol.\n");
-}
-\f
-/* Stuff for dealing with the packets which are part of this protocol.
- See comment at top of file for details. */
-
-/* Read a single character from the remote end, masking it down to 7 bits. */
-
-static int
-readchar (int timeout)
-{
- int ch;
-
- ch = serial_readchar (sds_desc, timeout);
-
- if (remote_debug > 1 && ch >= 0)
- fprintf_unfiltered (gdb_stdlog, "%c(%x)", ch, ch);
-
- switch (ch)
- {
- case SERIAL_EOF:
- error ("Remote connection closed");
- case SERIAL_ERROR:
- perror_with_name ("Remote communication error");
- case SERIAL_TIMEOUT:
- return ch;
- default:
- return ch & 0x7f;
- }
-}
-
-/* An SDS-style checksum is a sum of the bytes modulo 253. (Presumably
- because 253, 254, and 255 are special flags in the protocol.) */
-
-static int
-compute_checksum (int csum, char *buf, int len)
-{
- int i;
-
- for (i = 0; i < len; ++i)
- csum += (unsigned char) buf[i];
-
- csum %= 253;
- return csum;
-}
-
-/* Send the command in BUF to the remote machine, and read the reply
- into BUF also. */
-
-static int
-sds_send (unsigned char *buf, int len)
-{
- putmessage (buf, len);
-
- return getmessage (buf, 0);
-}
-
-/* Send a message to the remote machine. */
-
-static int
-putmessage (unsigned char *buf, int len)
-{
- int i, enclen;
- unsigned char csum = 0;
- char buf2[PBUFSIZ], buf3[PBUFSIZ];
- unsigned char header[3];
- char *p;
-
- /* Copy the packet into buffer BUF2, encapsulating it
- and giving it a checksum. */
-
- if (len > 170) /* Prosanity check */
- internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
-
- if (remote_debug)
- {
- fprintf_unfiltered (gdb_stdlog, "Message to send: \"");
- for (i = 0; i < len; ++i)
- fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
- fprintf_unfiltered (gdb_stdlog, "\"\n");
- }
-
- p = buf2;
- *p++ = '$';
-
- if (len % 3 != 0)
- {
- buf[len] = '\0';
- buf[len + 1] = '\0';
- }
-
- header[1] = next_msg_id;
-
- header[2] = len;
-
- csum = compute_checksum (csum, buf, len);
- csum = compute_checksum (csum, header + 1, 2);
-
- header[0] = csum;
-
- tob64 (header, p, 3);
- p += 4;
- enclen = tob64 (buf, buf3, ((len + 2) / 3) * 3);
-
- for (i = 0; i < enclen; ++i)
- *p++ = buf3[i];
- *p++ = '\r';
- *p++ = '\n';
-
- next_msg_id = (next_msg_id + 3) % 245;
-
- /* Send it over and over until we get a positive ack. */
-
- while (1)
- {
- if (remote_debug)
- {
- *p = '\0';
- fprintf_unfiltered (gdb_stdlog, "Sending encoded: \"%s\"", buf2);
- fprintf_unfiltered (gdb_stdlog,
- " (Checksum %d, id %d, length %d)\n",
- header[0], header[1], header[2]);
- gdb_flush (gdb_stdlog);
- }
- if (serial_write (sds_desc, buf2, p - buf2))
- perror_with_name ("putmessage: write failed");
-
- return 1;
- }
-}
-
-/* Come here after finding the start of the frame. Collect the rest
- into BUF. Returns 0 on any error, 1 on success. */
-
-static int
-read_frame (char *buf)
-{
- char *bp;
- int c;
-
- bp = buf;
-
- while (1)
- {
- c = readchar (sds_timeout);
-
- switch (c)
- {
- case SERIAL_TIMEOUT:
- if (remote_debug)
- fputs_filtered ("Timeout in mid-message, retrying\n", gdb_stdlog);
- return 0;
- case '$':
- if (remote_debug)
- fputs_filtered ("Saw new packet start in middle of old one\n",
- gdb_stdlog);
- return 0; /* Start a new packet, count retries */
- case '\r':
- break;
-
- case '\n':
- {
- *bp = '\000';
- if (remote_debug)
- fprintf_unfiltered (gdb_stdlog, "Received encoded: \"%s\"\n",
- buf);
- return 1;
- }
-
- default:
- if (bp < buf + PBUFSIZ - 1)
- {
- *bp++ = c;
- continue;
- }
-
- *bp = '\0';
- puts_filtered ("Message too long: ");
- puts_filtered (buf);
- puts_filtered ("\n");
-
- return 0;
- }
- }
-}
-
-/* Read a packet from the remote machine, with error checking,
- and store it in BUF. BUF is expected to be of size PBUFSIZ.
- If FOREVER, wait forever rather than timing out; this is used
- while the target is executing user code. */
-
-static int
-getmessage (unsigned char *buf, int forever)
-{
- int c, c2, c3;
- int tries;
- int timeout;
- int val, i, len, csum;
- unsigned char header[3];
- unsigned char inbuf[500];
-
- strcpy (buf, "timeout");
-
- if (forever)
- {
- timeout = watchdog > 0 ? watchdog : -1;
- }
-
- else
- timeout = sds_timeout;
-
-#define MAX_TRIES 3
-
- for (tries = 1; tries <= MAX_TRIES; tries++)
- {
- /* This can loop forever if the remote side sends us characters
- continuously, but if it pauses, we'll get a zero from readchar
- because of timeout. Then we'll count that as a retry. */
-
- /* Note that we will only wait forever prior to the start of a packet.
- After that, we expect characters to arrive at a brisk pace. They
- should show up within sds_timeout intervals. */
-
- do
- {
- c = readchar (timeout);
-
- if (c == SERIAL_TIMEOUT)
- {
- if (forever) /* Watchdog went off. Kill the target. */
- {
- target_mourn_inferior ();
- error ("Watchdog has expired. Target detached.\n");
- }
- if (remote_debug)
- fputs_filtered ("Timed out.\n", gdb_stdlog);
- goto retry;
- }
- }
- while (c != '$' && c != '{');
-
- /* We might have seen a "trigraph", a sequence of three characters
- that indicate various sorts of communication state. */
-
- if (c == '{')
- {
- /* Read the other two chars of the trigraph. */
- c2 = readchar (timeout);
- c3 = readchar (timeout);
- if (remote_debug)
- fprintf_unfiltered (gdb_stdlog, "Trigraph %c%c%c received\n",
- c, c2, c3);
- if (c3 == '+')
- {
- message_pending = 1;
- return 0; /*???? */
- }
- continue;
- }
-
- val = read_frame (inbuf);
-
- if (val == 1)
- {
- fromb64 (inbuf, header, 4);
- /* (should check out other bits) */
- fromb64 (inbuf + 4, buf, strlen (inbuf) - 4);
-
- len = header[2];
-
- csum = 0;
- csum = compute_checksum (csum, buf, len);
- csum = compute_checksum (csum, header + 1, 2);
-
- if (csum != header[0])
- fprintf_unfiltered (gdb_stderr,
- "Checksum mismatch: computed %d, received %d\n",
- csum, header[0]);
-
- if (header[2] == 0xff)
- fprintf_unfiltered (gdb_stderr, "Requesting resend...\n");
-
- if (remote_debug)
- {
- fprintf_unfiltered (gdb_stdlog,
- "... (Got checksum %d, id %d, length %d)\n",
- header[0], header[1], header[2]);
- fprintf_unfiltered (gdb_stdlog, "Message received: \"");
- for (i = 0; i < len; ++i)
- {
- fprintf_unfiltered (gdb_stdlog, "%02x", (unsigned char) buf[i]);
- }
- fprintf_unfiltered (gdb_stdlog, "\"\n");
- }
-
- /* no ack required? */
- return len;
- }
-
- /* Try the whole thing again. */
- retry:
- /* need to do something here */
- ;
- }
-
- /* We have tried hard enough, and just can't receive the packet. Give up. */
-
- printf_unfiltered ("Ignoring packet error, continuing...\n");
- return 0;
-}
-\f
-static void
-sds_kill (void)
-{
- /* Don't try to do anything to the target. */
-}
-
-static void
-sds_mourn (void)
-{
- unpush_target (&sds_ops);
- generic_mourn_inferior ();
-}
-
-static void
-sds_create_inferior (char *exec_file, char *args, char **env, int from_tty)
-{
- inferior_ptid = pid_to_ptid (42000);
-
- /* Clean up from the last time we were running. */
- clear_proceed_status ();
-
- write_pc (bfd_get_start_address (exec_bfd));
-}
-
-static void
-sds_load (char *filename, int from_tty)
-{
- generic_load (filename, from_tty);
-
- inferior_ptid = null_ptid;
-}
-\f
-/* The SDS monitor has commands for breakpoint insertion, although it
- it doesn't actually manage the breakpoints, it just returns the
- replaced instruction back to the debugger. */
-
-static int
-sds_insert_breakpoint (struct bp_target_info *bp_tgt)
-{
- CORE_ADDR addr = bp_tgt->placed_address;
- int i, retlen;
- unsigned char *p, buf[PBUFSIZ];
-
- p = buf;
- *p++ = 16;
- *p++ = 0;
- *p++ = (int) (addr >> 24) & 0xff;
- *p++ = (int) (addr >> 16) & 0xff;
- *p++ = (int) (addr >> 8) & 0xff;
- *p++ = (int) (addr) & 0xff;
-
- retlen = sds_send (buf, p - buf);
-
- for (i = 0; i < 4; ++i)
- bp_tgt->shadow_contents[i] = buf[i + 2];
-
- return 0;
-}
-
-static int
-sds_remove_breakpoint (struct bp_target_info *bp_tgt)
-{
- CORE_ADDR addr = bp_tgt->placed_address;
- int i, retlen;
- unsigned char *p, buf[PBUFSIZ];
-
- p = buf;
- *p++ = 17;
- *p++ = 0;
- *p++ = (int) (addr >> 24) & 0xff;
- *p++ = (int) (addr >> 16) & 0xff;
- *p++ = (int) (addr >> 8) & 0xff;
- *p++ = (int) (addr) & 0xff;
- for (i = 0; i < 4; ++i)
- *p++ = bp_tgt->shadow_contents[i];
-
- retlen = sds_send (buf, p - buf);
-
- return 0;
-}
-\f
-static void
-init_sds_ops (void)
-{
- sds_ops.to_shortname = "sds";
- sds_ops.to_longname = "Remote serial target with SDS protocol";
- sds_ops.to_doc = "Use a remote computer via a serial line; using the SDS protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).";
- sds_ops.to_open = sds_open;
- sds_ops.to_close = sds_close;
- sds_ops.to_detach = sds_detach;
- sds_ops.to_resume = sds_resume;
- sds_ops.to_wait = sds_wait;
- sds_ops.to_fetch_registers = sds_fetch_registers;
- sds_ops.to_store_registers = sds_store_registers;
- sds_ops.to_prepare_to_store = sds_prepare_to_store;
- sds_ops.deprecated_xfer_memory = sds_xfer_memory;
- sds_ops.to_files_info = sds_files_info;
- sds_ops.to_insert_breakpoint = sds_insert_breakpoint;
- sds_ops.to_remove_breakpoint = sds_remove_breakpoint;
- sds_ops.to_kill = sds_kill;
- sds_ops.to_load = sds_load;
- sds_ops.to_create_inferior = sds_create_inferior;
- sds_ops.to_mourn_inferior = sds_mourn;
- sds_ops.to_stratum = process_stratum;
- sds_ops.to_has_all_memory = 1;
- sds_ops.to_has_memory = 1;
- sds_ops.to_has_stack = 1;
- sds_ops.to_has_registers = 1;
- sds_ops.to_has_execution = 1;
- sds_ops.to_magic = OPS_MAGIC;
-}
-
-/* Put a command string, in args, out to the monitor and display the
- reply message. */
-
-static void
-sds_command (char *args, int from_tty)
-{
- char *p;
- int i, len, retlen;
- unsigned char buf[1000];
-
- /* Convert hexadecimal chars into a byte buffer. */
- p = args;
- len = 0;
- while (*p != '\0')
- {
- buf[len++] = fromhex (p[0]) * 16 + fromhex (p[1]);
- if (p[1] == '\0')
- break;
- p += 2;
- }
-
- retlen = sds_send (buf, len);
-
- printf_filtered ("Reply is ");
- for (i = 0; i < retlen; ++i)
- {
- printf_filtered ("%02x", buf[i]);
- }
- printf_filtered ("\n");
-}
-
-void
-_initialize_remote_sds (void)
-{
- init_sds_ops ();
- add_target (&sds_ops);
-
- add_setshow_integer_cmd ("sdstimeout", no_class, &sds_timeout, _("\
-Set timeout value for sds read."), _("\
-Show timeout value for sds read."), NULL,
- NULL,
- NULL, /* FIXME: i18n: */
- &setlist, &showlist);
-
- add_com ("sds", class_obscure, sds_command,
- _("Send a command to the SDS monitor."));
-}
projects / binutils-gdb.git / commitdiff