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Diffstat (limited to 'gdb/remote-sds.c')
| -rw-r--r-- | gdb/remote-sds.c | 1206 |
1 files changed, 0 insertions, 1206 deletions
diff --git a/gdb/remote-sds.c b/gdb/remote-sds.c deleted file mode 100644 index 3ab5f44..0000000 --- a/gdb/remote-sds.c +++ /dev/null @@ -1,1206 +0,0 @@ -/* Remote target communications for serial-line targets using SDS' protocol. - Copyright 1997 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 "bfd.h" -#include "symfile.h" -#include "target.h" -#include "wait.h" -#include "gdbcmd.h" -#include "objfiles.h" -#include "gdb-stabs.h" -#include "gdbthread.h" -#include "gdbcore.h" -#include "dcache.h" - -#ifdef USG -#include <sys/types.h> -#endif - -#include <signal.h> -#include "serial.h" - -extern void _initialize_remote_sds PARAMS ((void)); - -/* Declarations of local functions. */ - -static int sds_write_bytes PARAMS ((CORE_ADDR, char *, int)); - -static int sds_read_bytes PARAMS ((CORE_ADDR, char *, int)); - -static void sds_files_info PARAMS ((struct target_ops *ignore)); - -static int sds_xfer_memory PARAMS ((CORE_ADDR, char *, - int, int, struct target_ops *)); - -static void sds_prepare_to_store PARAMS ((void)); - -static void sds_fetch_registers PARAMS ((int)); - -static void sds_resume PARAMS ((int, int, enum target_signal)); - -static int sds_start_remote PARAMS ((PTR)); - -static void sds_open PARAMS ((char *, int)); - -static void sds_close PARAMS ((int)); - -static void sds_store_registers PARAMS ((int)); - -static void sds_mourn PARAMS ((void)); - -static void sds_create_inferior PARAMS ((char *, char *, char **)); - -static void sds_load PARAMS ((char *, int)); - -static int getmessage PARAMS ((unsigned char *, int)); - -static int putmessage PARAMS ((unsigned char *, int)); - -static int sds_send PARAMS ((unsigned char *, int)); - -static int readchar PARAMS ((int)); - -static int sds_wait PARAMS ((int, struct target_waitstatus *)); - -static void sds_kill PARAMS ((void)); - -static int tohex PARAMS ((int)); - -static int fromhex PARAMS ((int)); - -static void sds_detach PARAMS ((char *, int)); - -static void sds_interrupt PARAMS ((int)); - -static void sds_interrupt_twice PARAMS ((int)); - -static void interrupt_query PARAMS ((void)); - -static int read_frame PARAMS ((char *)); - -static int sds_insert_breakpoint PARAMS ((CORE_ADDR, char *)); - -static int sds_remove_breakpoint PARAMS ((CORE_ADDR, char *)); - -static void init_sds_ops PARAMS ((void)); - -static void sds_command PARAMS ((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 serial_t 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; - - -/* Clean up connection to a remote debugger. */ - -/* ARGSUSED */ -static void -sds_close (quitting) - int quitting; -{ - if (sds_desc) - SERIAL_CLOSE (sds_desc); - sds_desc = NULL; -} - -/* Stub for catch_errors. */ - -static int -sds_start_remote (dummy) - PTR dummy; -{ - char c; - unsigned char buf[200]; - - immediate_quit = 1; /* 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 = 0; - - start_remote (); /* Initialize gdb process mechanisms */ - return 1; -} - -/* Open a connection to a remote debugger. - NAME is the filename used for communication. */ - -static DCACHE *sds_dcache; - -static void -sds_open (name, from_tty) - 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_dcache = dcache_init (sds_read_bytes, sds_write_bytes); - - 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, NULL, - "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 (args, from_tty) - 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 (a) - 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); -} - -/* Convert number NIB to a hex digit. */ - -static int -tohex (nib) - int nib; -{ - if (nib < 10) - return '0'+nib; - else - return 'a'+nib-10; -} - -static int -tob64 (inbuf, outbuf, len) - 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 (inbuf, outbuf, len) - char *inbuf, *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; -} - - -/* Tell the remote machine to resume. */ - -static enum target_signal last_sent_signal = TARGET_SIGNAL_0; -int last_sent_step; - -static void -sds_resume (pid, step, siggnal) - int pid, step; - enum target_signal siggnal; -{ - unsigned char buf[PBUFSIZ]; - - dcache_flush (sds_dcache); - - last_sent_signal = siggnal; - last_sent_step = step; - - buf[0] = (step ? 21 : 20); - buf[1] = 0; /* (should be signal?) */ - - sds_send (buf, 2); -} - -/* Send a message to target to halt it. Target will respond, and send - us a message pending notice. */ - -static void -sds_interrupt (signo) - int signo; -{ - unsigned char buf[PBUFSIZ]; - - /* If this doesn't work, try more severe steps. */ - signal (signo, sds_interrupt_twice); - - if (remote_debug) - printf_unfiltered ("sds_interrupt called\n"); - - buf[0] = 25; - sds_send (buf, 1); -} - -static void (*ofunc)(); - -/* The user typed ^C twice. */ - -static void -sds_interrupt_twice (signo) - 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 () -{ - target_terminal_ours (); - - if (query ("Interrupted while waiting for the program.\n\ -Give up (and stop debugging it)? ")) - { - target_mourn_inferior (); - return_to_top_level (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 int -sds_wait (pid, status) - int pid; - 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_pid; - } - - while (1) - { - getmessage (buf, 1); - - if (message_pending) - { - buf[0] = 26; - retlen = sds_send (buf, 1); - if (remote_debug) - { - fprintf_unfiltered (gdb_stderr, "Signals: %04x %02x %02x\n", - ((int) buf[0]) << 8 + 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_pid; -} - -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. */ - -/* ARGSUSED */ -static void -sds_fetch_registers (regno) - int regno; -{ - unsigned char buf[PBUFSIZ]; - int i, retlen; - char *p; - char regs[REGISTER_BYTES]; - - /* Unimplemented registers read as all bits zero. */ - memset (regs, 0, 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++) - supply_register (i, ®s[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 () -{ - /* Make sure the entire registers array is valid. */ - read_register_bytes (0, (char *)NULL, REGISTER_BYTES); -} - -/* Store register REGNO, or all registers if REGNO == -1, from the contents - of REGISTERS. FIXME: ignores errors. */ - -static void -sds_store_registers (regno) - 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++ = 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++ = registers[i]; - - sds_send (buf, p - buf); - -} - -/* 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 (memaddr, myaddr, len) - 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 (memaddr, myaddr, len) - 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; -} - -/* 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. */ - -/* ARGSUSED */ -static int -sds_xfer_memory(memaddr, myaddr, len, should_write, target) - CORE_ADDR memaddr; - char *myaddr; - int len; - int should_write; - struct target_ops *target; /* ignored */ -{ - return dcache_xfer_memory (sds_dcache, memaddr, myaddr, len, should_write); -} - - -static void -sds_files_info (ignore) - struct target_ops *ignore; -{ - puts_filtered ("Debugging over a serial connection, using SDS protocol.\n"); -} - -/* 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 (timeout) - int timeout; -{ - int ch; - - ch = SERIAL_READCHAR (sds_desc, timeout); - - if (remote_debug > 1 && ch >= 0) - printf_unfiltered("%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 (csum, buf, len) - int csum, len; - char *buf; -{ - 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 (buf, len) - unsigned char *buf; - int len; -{ - putmessage (buf, len); - - return getmessage (buf, 0); -} - -/* Send a message to the remote machine. */ - -static int -putmessage (buf, len) - unsigned char *buf; - int len; -{ - int i, enclen; - unsigned char csum = 0; - char buf2[PBUFSIZ], buf3[PBUFSIZ]; - unsigned char header[3]; - int ch; - int tcount = 0; - char *p; - - /* Copy the packet into buffer BUF2, encapsulating it - and giving it a checksum. */ - - if (len > 170) /* Prosanity check */ - abort(); - - if (remote_debug) - { - fprintf_unfiltered (gdb_stderr, "Message to send: \""); - for (i = 0; i < len; ++i) - fprintf_unfiltered (gdb_stderr, "%02x", buf[i]); - fprintf_unfiltered (gdb_stderr, "\"\n"); - } - - p = buf2; - *p++ = '$'; - - if (len % 3 != 0) - { - buf[len] = '\0'; - buf[len+1] = '\0'; - } - - header[1] = next_msg_id; - - header[2] = len; - - csum = compute_checksum (csum, buf, len); - csum = compute_checksum (csum, header + 1, 2); - - header[0] = csum; - - tob64 (header, p, 3); - p += 4; - enclen = tob64 (buf, buf3, ((len + 2) / 3) * 3); - - for (i = 0; i < enclen; ++i) - *p++ = buf3[i]; - *p++ = '\r'; - *p++ = '\n'; - - next_msg_id = (next_msg_id + 3) % 245; - - /* Send it over and over until we get a positive ack. */ - - while (1) - { - int started_error_output = 0; - - if (remote_debug) - { - *p = '\0'; - printf_unfiltered ("Sending encoded: \"%s\"", buf2); - printf_unfiltered (" (Checksum %d, id %d, length %d)\n", - header[0], header[1], header[2]); - gdb_flush (gdb_stdout); - } - if (SERIAL_WRITE (sds_desc, buf2, p - buf2)) - perror_with_name ("putmessage: write failed"); - - return 1; - - } - -} - -/* Come here after finding the start of the frame. Collect the rest - into BUF. Returns 0 on any error, 1 on success. */ - -static int -read_frame (buf) - char *buf; -{ - char *bp; - int c; - - bp = buf; - - while (1) - { - c = readchar (sds_timeout); - - switch (c) - { - case SERIAL_TIMEOUT: - if (remote_debug) - puts_filtered ("Timeout in mid-message, retrying\n"); - return 0; - case '$': - if (remote_debug) - puts_filtered ("Saw new packet start in middle of old one\n"); - return 0; /* Start a new packet, count retries */ - case '\r': - break; - - case '\n': - { - *bp = '\000'; - if (remote_debug) - fprintf_unfiltered (gdb_stderr, "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 (buf, forever) - 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) - { -#ifdef MAINTENANCE_CMDS - timeout = watchdog > 0 ? watchdog : -1; -#else - timeout = -1; -#endif - } - - 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) - { -#ifdef MAINTENANCE_CMDS - if (forever) /* Watchdog went off. Kill the target. */ - { - target_mourn_inferior (); - error ("Watchdog has expired. Target detached.\n"); - } -#endif - if (remote_debug) - puts_filtered ("Timed out.\n"); - 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_stderr, "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_stderr, - "... (Got checksum %d, id %d, length %d)\n", - header[0], header[1], header[2]); - fprintf_unfiltered (gdb_stderr, "Message received: \""); - for (i = 0; i < len; ++i) - { - fprintf_unfiltered (gdb_stderr, "%02x", (unsigned char) buf[i]); - } - fprintf_unfiltered (gdb_stderr, "\"\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; -} - -static void -sds_kill () -{ - /* Don't try to do anything to the target. */ -} - -static void -sds_mourn () -{ - unpush_target (&sds_ops); - generic_mourn_inferior (); -} - -static void -sds_create_inferior (exec_file, args, env) - char *exec_file; - char *args; - char **env; -{ - inferior_pid = 42000; - - /* Clean up from the last time we were running. */ - clear_proceed_status (); - - /* Let the remote process run. */ - proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); -} - -static void -sds_load (filename, from_tty) - char *filename; - int from_tty; -{ - generic_load (filename, from_tty); - - inferior_pid = 0; -} - -/* 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 (addr, contents_cache) - CORE_ADDR addr; - char *contents_cache; -{ - 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) - contents_cache[i] = buf[i + 2]; - - return 0; -} - -static int -sds_remove_breakpoint (addr, contents_cache) - CORE_ADDR addr; - char *contents_cache; -{ - 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++ = contents_cache[i]; - - retlen = sds_send (buf, p - buf); - - return 0; -} - -static void -init_sds_ops () -{ - 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.to_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 (args, from_tty) - 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 () -{ - init_sds_ops (); - add_target (&sds_ops); - - add_show_from_set (add_set_cmd ("sdstimeout", no_class, - var_integer, (char *)&sds_timeout, - "Set timeout value for sds read.\n", &setlist), - &showlist); - - add_com ("sds", class_obscure, sds_command, - "Send a command to the SDS monitor."); -} |