/* Remote debugging interface for MIPS remote debugging protocol.
- Copyright 1993 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
Contributed by Cygnus Support. Written by Ian Lance Taylor
<ian@cygnus.com>.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "remote-utils.h"
#include <signal.h>
+#ifdef ANSI_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+extern char *mips_read_processor_type PARAMS ((void));
+
+extern void mips_set_processor_type_command PARAMS ((char *, int));
+
\f
/* Prototypes for local functions. */
-static int
-mips_readchar PARAMS ((int timeout));
+static int mips_readchar PARAMS ((int timeout));
-static int
-mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, int ch,
- int timeout));
+static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage,
+ int ch, int timeout));
-static int
-mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, int *pch,
- int timeout));
+static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage,
+ int *pch, int timeout));
static int mips_cksum PARAMS ((const unsigned char *hdr,
const unsigned char *data,
int len));
-static void
-mips_send_packet PARAMS ((const char *s, int get_ack));
+static void mips_send_packet PARAMS ((const char *s, int get_ack));
-static int
-mips_receive_packet PARAMS ((char *buff));
+static void mips_send_command PARAMS ((const char *cmd, int prompt));
-static int
-mips_request PARAMS ((char cmd, unsigned int addr, unsigned int data,
- int *perr));
+static int mips_receive_packet PARAMS ((char *buff, int throw_error,
+ int timeout));
-static void
-mips_initialize PARAMS ((void));
+static int mips_request PARAMS ((int cmd, unsigned int addr,
+ unsigned int data, int *perr, int timeout,
+ char *buff));
-static void
-mips_open PARAMS ((char *name, int from_tty));
+static void mips_initialize PARAMS ((void));
-static void
-mips_close PARAMS ((int quitting));
+static void mips_open PARAMS ((char *name, int from_tty));
-static void
-mips_detach PARAMS ((char *args, int from_tty));
+static void pmon_open PARAMS ((char *name, int from_tty));
-static void
-mips_resume PARAMS ((int pid, int step, int siggnal));
+static void mips_close PARAMS ((int quitting));
-static int
-mips_wait PARAMS ((int pid, WAITTYPE *status));
+static void mips_detach PARAMS ((char *args, int from_tty));
-static int
-mips_map_regno PARAMS ((int regno));
+static void mips_resume PARAMS ((int pid, int step,
+ enum target_signal siggnal));
-static void
-mips_fetch_registers PARAMS ((int regno));
+static int mips_wait PARAMS ((int pid, struct target_waitstatus *status));
-static void
-mips_prepare_to_store PARAMS ((void));
+static int pmon_wait PARAMS ((int pid, struct target_waitstatus *status));
-static void
-mips_store_registers PARAMS ((int regno));
+static int mips_map_regno PARAMS ((int regno));
-static int
-mips_fetch_word PARAMS ((CORE_ADDR addr));
+static void mips_fetch_registers PARAMS ((int regno));
-static void
-mips_store_word PARAMS ((CORE_ADDR addr, int value));
+static void mips_prepare_to_store PARAMS ((void));
-static int
-mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
- int write, struct target_ops *ignore));
+static void mips_store_registers PARAMS ((int regno));
-static void
-mips_files_info PARAMS ((struct target_ops *ignore));
+static int mips_fetch_word PARAMS ((CORE_ADDR addr));
-static void
-mips_load PARAMS ((char *args, int from_tty));
+static int mips_store_word PARAMS ((CORE_ADDR addr, int value,
+ char *old_contents));
-static void
-mips_create_inferior PARAMS ((char *execfile, char *args, char **env));
+static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
+ int write, struct target_ops *ignore));
-static void
-mips_mourn_inferior PARAMS ((void));
+static void mips_files_info PARAMS ((struct target_ops *ignore));
+
+static void mips_create_inferior PARAMS ((char *execfile, char *args,
+ char **env));
+
+static void mips_mourn_inferior PARAMS ((void));
+
+static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum));
+
+static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount,
+ unsigned int *chksum));
+
+static int pmon_checkset PARAMS ((int recsize, char **buff, int *value));
-/* A forward declaration. */
+static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf,
+ int *inptr, int inamount, int *recsize,
+ unsigned int *csum, unsigned int *zerofill));
+
+static int pmon_check_ack PARAMS ((void));
+
+static void pmon_load_fast PARAMS ((char *file));
+
+static void mips_load PARAMS ((char *file, int from_tty));
+
+static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr,
+ unsigned char *myaddr, int len));
+
+static int common_breakpoint PARAMS ((int cmd, CORE_ADDR addr, CORE_ADDR mask,
+ char *flags));
+
+static void common_open PARAMS ((struct target_ops *ops, char *name,
+ int from_tty));
+/* Forward declarations. */
extern struct target_ops mips_ops;
+extern struct target_ops pmon_ops;
\f
/* The MIPS remote debugging interface is built on top of a simple
packet protocol. Each packet is organized as follows:
The value is
0x40 + seq
An acknowlegment packet contains the sequence number of the
- packet being acknowledged plus 1 module 64. Data packets are
+ packet being acknowledged plus 1 modulo 64. Data packets are
transmitted in sequence. There may only be one outstanding
unacknowledged data packet at a time. The sequence numbers
are independent in each direction. If an acknowledgement for
/* The sequence number modulos. */
#define SEQ_MODULOS (64)
+enum mips_monitor_type {
+ /* IDT/SIM monitor being used: */
+ MON_IDT,
+ /* PMON monitor being used: */
+ MON_PMON,
+ /* Last and unused value, for sizing vectors, etc. */
+ MON_LAST
+};
+static enum mips_monitor_type mips_monitor = MON_LAST;
+
+/* The default monitor prompt text: */
+static char *mips_monitor_prompt = TARGET_MONITOR_PROMPT;
+/* For the Cogent PMON world this is still not ideal. The default
+ prompt is "PMON> ", unfortunately the user can change the prompt
+ and the new prompt will survive over a power-cycle (EEPROM). This
+ means that the code should really force the monitor prompt to a
+ known value as the very first action, and that the
+ "mips_monitor_prompt" support is not needed... since the prompt
+ could be explicitly set to TARGET_MONITOR_PROMPT (even though it
+ may be the prompt for a different monitor). However, this will
+ require changing the mips_initialize reset sequence. (TODO) */
+
/* Set to 1 if the target is open. */
static int mips_is_open;
+/* Currently active target description (if mips_is_open == 1) */
+static struct target_ops *current_ops;
+
/* Set to 1 while the connection is being initialized. */
static int mips_initializing;
/* The next sequence number to send. */
-static int mips_send_seq;
+static unsigned int mips_send_seq;
/* The next sequence number we expect to receive. */
-static int mips_receive_seq;
+static unsigned int mips_receive_seq;
/* The time to wait before retransmitting a packet, in seconds. */
static int mips_retransmit_wait = 3;
/* Handle used to access serial I/O stream. */
static serial_t mips_desc;
+/* Counts the number of times the user tried to interrupt the target (usually
+ via ^C. */
+static int interrupt_count;
+
+/* If non-zero, means that the target is running. */
+static int mips_wait_flag = 0;
+
+/* If non-zero, monitor supports breakpoint commands. */
+static monitor_supports_breakpoints = 0;
+
+/* Data cache header. */
+
+static DCACHE *mips_dcache;
+
+/* Non-zero means that we've just hit a read or write watchpoint */
+static int hit_watchpoint;
+
+/* Handle low-level error that we can't recover from. Note that just
+ error()ing out from target_wait or some such low-level place will cause
+ all hell to break loose--the rest of GDB will tend to get left in an
+ inconsistent state. */
+
+static NORETURN void
+#ifdef ANSI_PROTOTYPES
+mips_error (char *string, ...)
+#else
+mips_error (va_alist)
+ va_dcl
+#endif
+{
+ va_list args;
+
+#ifdef ANSI_PROTOTYPES
+ va_start (args, string);
+#else
+ char *string;
+ va_start (args);
+ string = va_arg (args, char *);
+#endif
+
+ target_terminal_ours ();
+ wrap_here(""); /* Force out any buffered output */
+ gdb_flush (gdb_stdout);
+ if (error_pre_print)
+ fprintf_filtered (gdb_stderr, error_pre_print);
+ vfprintf_filtered (gdb_stderr, string, args);
+ fprintf_filtered (gdb_stderr, "\n");
+ va_end (args);
+ gdb_flush (gdb_stderr);
+
+ /* Clean up in such a way that mips_close won't try to talk to the
+ board (it almost surely won't work since we weren't able to talk to
+ it). */
+ mips_is_open = 0;
+ SERIAL_CLOSE (mips_desc);
+
+ printf_unfiltered ("Ending remote MIPS debugging.\n");
+ target_mourn_inferior ();
+
+ return_to_top_level (RETURN_ERROR);
+}
+
+/* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
+ timed out. */
+
+int
+mips_expect (string)
+ char *string;
+{
+ char *p = string;
+
+ immediate_quit = 1;
+ while (1)
+ {
+ int c;
+
+/* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
+ were waiting for the mips_monitor_prompt... */
+
+ c = SERIAL_READCHAR (mips_desc, 2);
+
+ if (c == SERIAL_TIMEOUT)
+ return 0;
+
+ if (c == *p++)
+ {
+ if (*p == '\0')
+ {
+ immediate_quit = 0;
+ return 1;
+ }
+ }
+ else
+ {
+ p = string;
+ if (c == *p)
+ p++;
+ }
+ }
+}
+
+/* Read the required number of characters into the given buffer (which
+ is assumed to be large enough). The only failure is a timeout. */
+int
+mips_getstring (string, n)
+ char *string;
+ int n;
+{
+ char *p = string;
+ int c;
+
+ immediate_quit = 1;
+ while (n > 0)
+ {
+ c = SERIAL_READCHAR (mips_desc, 2);
+
+ if (c == SERIAL_TIMEOUT) {
+ fprintf_unfiltered (stderr, "Failed to read %d characters from target (TIMEOUT)\n", n);
+ return 0;
+ }
+
+ *p++ = c;
+ n--;
+ }
+
+ return 1;
+}
+
/* Read a character from the remote, aborting on error. Returns
SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
- returns). FIXME: If we see the string "<IDT>" from the board, then
- we are debugging on the main console port, and we have somehow
- dropped out of remote debugging mode. In this case, we
- automatically go back in to remote debugging mode. This is a hack,
- put in because I can't find any way for a program running on the
- remote board to terminate without also ending remote debugging
+ returns). FIXME: If we see the string mips_monitor_prompt from
+ the board, then we are debugging on the main console port, and we
+ have somehow dropped out of remote debugging mode. In this case,
+ we automatically go back in to remote debugging mode. This is a
+ hack, put in because I can't find any way for a program running on
+ the remote board to terminate without also ending remote debugging
mode. I assume users won't have any trouble with this; for one
thing, the IDT documentation generally assumes that the remote
debugging port is not the console port. This is, however, very
{
int ch;
static int state = 0;
- static char nextstate[5] = { '<', 'I', 'D', 'T', '>' };
+ static int mips_monitor_prompt_len = -1;
+
+ /* NASTY, since we assume that the prompt does not change after the
+ first mips_readchar call: */
+ if (mips_monitor_prompt_len = -1)
+ mips_monitor_prompt_len = strlen(mips_monitor_prompt);
+
+#ifdef MAINTENANCE_CMDS
+ {
+ int i;
+
+ i = timeout;
+ if (i == -1 && watchdog > 0)
+ i = watchdog;
+ }
+#endif
+ if (state == mips_monitor_prompt_len)
+ timeout = 1;
ch = SERIAL_READCHAR (mips_desc, timeout);
+#ifdef MAINTENANCE_CMDS
+ if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
+ {
+ target_mourn_inferior ();
+ error ("Watchdog has expired. Target detached.\n");
+ }
+#endif
if (ch == SERIAL_EOF)
- error ("End of file from remote");
+ mips_error ("End of file from remote");
if (ch == SERIAL_ERROR)
- error ("Error reading from remote: %s", safe_strerror (errno));
- if (sr_get_debug () > 1)
+ mips_error ("Error reading from remote: %s", safe_strerror (errno));
+ if (remote_debug > 1)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (ch != SERIAL_TIMEOUT)
- printf_filtered ("Read '%c' %d 0x%x\n", ch, ch, ch);
+ printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch);
else
- printf_filtered ("Timed out in read\n");
+ printf_unfiltered ("Timed out in read\n");
}
- /* If we have seen <IDT> and we either time out, or we see a @
- (which was echoed from a packet we sent), reset the board as
- described above. The first character in a packet after the SYN
- (which is not echoed) is always an @ unless the packet is more
- than 64 characters long, which ours never are. */
+ /* If we have seen mips_monitor_prompt and we either time out, or
+ we see a @ (which was echoed from a packet we sent), reset the
+ board as described above. The first character in a packet after
+ the SYN (which is not echoed) is always an @ unless the packet is
+ more than 64 characters long, which ours never are. */
if ((ch == SERIAL_TIMEOUT || ch == '@')
- && state == 5
+ && state == mips_monitor_prompt_len
&& ! mips_initializing)
{
- if (sr_get_debug () > 0)
- printf_filtered ("Reinitializing MIPS debugging mode\n");
- SERIAL_WRITE (mips_desc, "\rdb tty0\r", sizeof "\rdb tty0\r" - 1);
- sleep (1);
+ if (remote_debug > 0)
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Reinitializing MIPS debugging mode\n");
mips_need_reply = 0;
mips_initialize ();
state = 0;
- error ("Remote board reset");
+ /* At this point, about the only thing we can do is abort the command
+ in progress and get back to command level as quickly as possible. */
+
+ error ("Remote board reset, debug protocol re-initialized.");
}
- if (ch == nextstate[state])
+ if (ch == mips_monitor_prompt[state])
++state;
else
state = 0;
{
ch = mips_readchar (timeout);
if (ch == SERIAL_TIMEOUT)
- return -1;
+ return -1;
if (ch != SYN)
{
/* Printing the character here lets the user of gdb see
what the program is outputting, if the debugging is
- being done on the console port. FIXME: Perhaps this
- should be filtered? */
- if (! mips_initializing || sr_get_debug () > 0)
+ being done on the console port. Don't use _filtered;
+ we can't deal with a QUIT out of target_wait. */
+ if (! mips_initializing || remote_debug > 0)
{
- putchar_unfiltered (ch);
+ /* Note that the host's idea of newline may not
+ correspond to the target's idea, so recognize
+ newline by its actual ASCII code, but write it
+ out using the \n notation. */
+ if (ch < 0x20 && ch != '\012')
+ {
+ putchar_unfiltered ('^');
+ putchar_unfiltered (ch + 0x40);
+ }
+ else if (ch == '\012')
+ putchar_unfiltered ('\n');
+ else
+ putchar_unfiltered (ch);
gdb_flush (gdb_stdout);
}
++*pgarbage;
- if (*pgarbage > mips_syn_garbage)
- error ("Remote debugging protocol failure");
+ if (mips_syn_garbage > 0
+ && *pgarbage > mips_syn_garbage)
+ mips_error ("Debug protocol failure: more than %d characters before a sync.",
+ mips_syn_garbage);
}
}
{
ch = mips_readchar (timeout);
if (ch == SERIAL_TIMEOUT)
- return -1;
-
+ return -1;
/* Make sure this is a header byte. */
if (ch == SYN || ! HDR_CHECK (ch))
break;
/* If we got the complete header, we can return. Otherwise we
loop around and keep looking for SYN. */
if (i >= HDR_LENGTH)
- return 0;
+ return 0;
}
}
len = strlen (s);
if (len > DATA_MAXLEN)
- error ("MIPS protocol data packet too long: %s", s);
+ mips_error ("MIPS protocol data packet too long: %s", s);
packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
the sequence number we expect in the acknowledgement. */
mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
- if (! get_ack)
- return;
-
/* We can only have one outstanding data packet, so we just wait for
the acknowledgement here. Keep retransmitting the packet until
we get one, or until we've tried too many times. */
int garbage;
int ch;
- if (sr_get_debug () > 0)
+ if (remote_debug > 0)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing \"%s\"\n", packet + 1);
+ printf_unfiltered ("Writing \"%s\"\n", packet + 1);
}
if (SERIAL_WRITE (mips_desc, packet,
HDR_LENGTH + len + TRLR_LENGTH) != 0)
- error ("write to target failed: %s", safe_strerror (errno));
+ mips_error ("write to target failed: %s", safe_strerror (errno));
+
+ if (! get_ack)
+ return;
garbage = 0;
ch = 0;
ignore it. FIXME: If the acknowledgement is lost, this
data packet may be the packet the remote sends after the
acknowledgement. */
- if (HDR_IS_DATA (hdr))
+ if (HDR_IS_DATA (hdr)) {
+ int i;
+
+ /* Ignore any errors raised whilst attempting to ignore
+ packet. */
+
+ len = HDR_GET_LEN (hdr);
+
+ for (i = 0; i < len; i++)
+ {
+ int rch;
+
+ rch = mips_readchar (2);
+ if (rch == SYN)
+ {
+ ch = SYN;
+ break;
+ }
+ if (rch == SERIAL_TIMEOUT)
+ break;
+ /* ignore the character */
+ }
+
+ if (i == len)
+ (void) mips_receive_trailer (trlr, &garbage, &ch, 2);
+
+ /* We don't bother checking the checksum, or providing an
+ ACK to the packet. */
continue;
+ }
/* If the length is not 0, this is a garbled packet. */
if (HDR_GET_LEN (hdr) != 0)
!= TRLR_GET_CKSUM (trlr))
continue;
- if (sr_get_debug () > 0)
+ if (remote_debug > 0)
{
hdr[HDR_LENGTH] = '\0';
trlr[TRLR_LENGTH] = '\0';
- printf_filtered ("Got ack %d \"%s%s\"\n",
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Got ack %d \"%s%s\"\n",
HDR_GET_SEQ (hdr), hdr + 1, trlr);
}
}
}
- error ("Remote did not acknowledge packet");
+ mips_error ("Remote did not acknowledge packet");
}
/* Receive and acknowledge a packet, returning the data in BUFF (which
should be DATA_MAXLEN + 1 bytes). The protocol documentation
implies that only the sender retransmits packets, so this code just
waits silently for a packet. It returns the length of the received
- packet. */
+ packet. If THROW_ERROR is nonzero, call error() on errors. If not,
+ don't print an error message and return -1. */
static int
-mips_receive_packet (buff)
+mips_receive_packet (buff, throw_error, timeout)
char *buff;
+ int throw_error;
+ int timeout;
{
int ch;
int garbage;
int i;
int err;
- if (mips_receive_header (hdr, &garbage, ch, mips_receive_wait) != 0)
- error ("Timed out waiting for remote packet");
+ if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
+ {
+ if (throw_error)
+ mips_error ("Timed out waiting for remote packet");
+ else
+ return -1;
+ }
ch = 0;
/* An acknowledgement is probably a duplicate; ignore it. */
if (! HDR_IS_DATA (hdr))
{
- if (sr_get_debug () > 0)
- printf_filtered ("Ignoring unexpected ACK\n");
- continue;
- }
-
- /* If this is the wrong sequence number, ignore it. */
- if (HDR_GET_SEQ (hdr) != mips_receive_seq)
- {
- if (sr_get_debug () > 0)
- printf_filtered ("Ignoring sequence number %d (want %d)\n",
- HDR_GET_SEQ (hdr), mips_receive_seq);
+ len = HDR_GET_LEN (hdr);
+ /* Check if the length is valid for an ACK, we may aswell
+ try and read the remainder of the packet: */
+ if (len == 0)
+ {
+ /* Ignore the error condition, since we are going to
+ ignore the packet anyway. */
+ (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
+ }
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ if (remote_debug > 0)
+ printf_unfiltered ("Ignoring unexpected ACK\n");
continue;
}
len = HDR_GET_LEN (hdr);
-
for (i = 0; i < len; i++)
{
int rch;
- rch = mips_readchar (mips_receive_wait);
+ rch = mips_readchar (timeout);
if (rch == SYN)
{
ch = SYN;
break;
}
if (rch == SERIAL_TIMEOUT)
- error ("Timed out waiting for remote packet");
+ {
+ if (throw_error)
+ mips_error ("Timed out waiting for remote packet");
+ else
+ return -1;
+ }
buff[i] = rch;
}
if (i < len)
{
- if (sr_get_debug () > 0)
- printf_filtered ("Got new SYN after %d chars (wanted %d)\n",
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ if (remote_debug > 0)
+ printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n",
i, len);
continue;
}
- err = mips_receive_trailer (trlr, &garbage, &ch, mips_receive_wait);
+ err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
if (err == -1)
- error ("Timed out waiting for packet");
+ {
+ if (throw_error)
+ mips_error ("Timed out waiting for packet");
+ else
+ return -1;
+ }
if (err == -2)
{
- if (sr_get_debug () > 0)
- printf_filtered ("Got SYN when wanted trailer\n");
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ if (remote_debug > 0)
+ printf_unfiltered ("Got SYN when wanted trailer\n");
+ continue;
+ }
+
+ /* If this is the wrong sequence number, ignore it. */
+ if (HDR_GET_SEQ (hdr) != mips_receive_seq)
+ {
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ if (remote_debug > 0)
+ printf_unfiltered ("Ignoring sequence number %d (want %d)\n",
+ HDR_GET_SEQ (hdr), mips_receive_seq);
continue;
}
if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
- break;
+ break;
- if (sr_get_debug () > 0)
- printf_filtered ("Bad checksum; data %d, trailer %d\n",
+ if (remote_debug > 0)
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
mips_cksum (hdr, buff, len),
TRLR_GET_CKSUM (trlr));
ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
- if (sr_get_debug () > 0)
+ if (remote_debug > 0)
{
ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq,
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
ack + 1);
}
if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
- error ("write to target failed: %s", safe_strerror (errno));
+ {
+ if (throw_error)
+ mips_error ("write to target failed: %s", safe_strerror (errno));
+ else
+ return -1;
+ }
}
- if (sr_get_debug () > 0)
+ if (remote_debug > 0)
{
buff[len] = '\0';
- printf_filtered ("Got packet \"%s\"\n", buff);
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Got packet \"%s\"\n", buff);
}
/* We got the packet. Send an acknowledgement. */
ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
- if (sr_get_debug () > 0)
+ if (remote_debug > 0)
{
ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq,
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
ack + 1);
}
if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
- error ("write to target failed: %s", safe_strerror (errno));
+ {
+ if (throw_error)
+ mips_error ("write to target failed: %s", safe_strerror (errno));
+ else
+ return -1;
+ }
return len;
}
target board reports. */
static int
-mips_request (cmd, addr, data, perr)
- char cmd;
+mips_request (cmd, addr, data, perr, timeout, buff)
+ int cmd;
unsigned int addr;
unsigned int data;
int *perr;
+ int timeout;
+ char *buff;
{
- char buff[DATA_MAXLEN + 1];
+ char myBuff[DATA_MAXLEN + 1];
int len;
int rpid;
char rcmd;
int rerrflg;
int rresponse;
-
+
+ if (buff == (char *) NULL)
+ buff = myBuff;
+
if (cmd != '\0')
{
if (mips_need_reply)
mips_need_reply = 0;
- len = mips_receive_packet (buff);
+ len = mips_receive_packet (buff, 1, timeout);
buff[len] = '\0';
if (sscanf (buff, "0x%x %c 0x%x 0x%x",
&rpid, &rcmd, &rerrflg, &rresponse) != 4
|| (cmd != '\0' && rcmd != cmd))
- error ("Bad response from remote board");
+ mips_error ("Bad response from remote board");
if (rerrflg != 0)
{
return rresponse;
}
+static void
+mips_initialize_cleanups (arg)
+ PTR arg;
+{
+ mips_initializing = 0;
+}
+
+static void
+mips_send_command (cmd, prompt)
+ const char *cmd;
+ int prompt;
+{
+ SERIAL_WRITE (mips_desc, cmd, strlen(cmd));
+ mips_expect (cmd);
+ mips_expect ("\012");
+ if (prompt)
+ mips_expect (mips_monitor_prompt);
+}
+
+/* Enter remote (dbx) debug mode: */
+static void
+mips_enter_debug ()
+{
+ /* Reset the sequence numbers, ready for the new debug sequence: */
+ mips_send_seq = 0;
+ mips_receive_seq = 0;
+
+ if (mips_monitor == MON_PMON)
+ mips_send_command ("debug\015", 0);
+ else /* assume IDT monitor by default */
+ mips_send_command ("db tty0\015", 0);
+
+ SERIAL_WRITE (mips_desc, "\015", sizeof "\015" - 1);
+
+ /* We don't need to absorb any spurious characters here, since the
+ mips_receive_header will eat up a reasonable number of characters
+ whilst looking for the SYN, however this avoids the "garbage"
+ being displayed to the user. */
+ if (mips_monitor == MON_PMON)
+ mips_expect ("\015");
+
+ {
+ char buff[DATA_MAXLEN + 1];
+ if (mips_receive_packet (buff, 1, 3) < 0)
+ mips_error ("Failed to initialize (didn't receive packet).");
+ }
+}
+
+/* Exit remote (dbx) debug mode, returning to the monitor prompt: */
+static int
+mips_exit_debug ()
+{
+ int err;
+
+ mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err,
+ mips_receive_wait, NULL);
+
+ if (mips_monitor == MON_PMON && !mips_expect ("Exiting remote debug mode"))
+ return -1;
+
+ if (!mips_expect ("\015\012"))
+ return -1;
+
+ if (!mips_expect (mips_monitor_prompt))
+ return -1;
+
+ return 0;
+}
+
/* Initialize a new connection to the MIPS board, and make sure we are
really connected. */
static void
mips_initialize ()
{
- char cr;
- int hold_wait;
- int tries;
- char buff[DATA_MAXLEN + 1];
int err;
+ struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
+ int j;
+
+ /* What is this code doing here? I don't see any way it can happen, and
+ it might mean mips_initializing didn't get cleared properly.
+ So I'll make it a warning. */
if (mips_initializing)
- return;
+ {
+ warning ("internal error: mips_initialize called twice");
+ return;
+ }
+ mips_wait_flag = 0;
mips_initializing = 1;
- mips_send_seq = 0;
- mips_receive_seq = 0;
+ /* At this point, the packit protocol isn't responding. We'll try getting
+ into the monitor, and restarting the protocol. */
- /* The board seems to want to send us a packet. I don't know what
- it means. The packet seems to be triggered by a carriage return
- character, although perhaps any character would do. */
- cr = '\r';
- SERIAL_WRITE (mips_desc, &cr, 1);
+ /* Force the system into the monitor. After this we *should* be at
+ the mips_monitor_prompt. */
+ if (mips_monitor == MON_PMON)
+ j = 0; /* start by checking if we are already at the prompt */
+ else
+ j = 1; /* start by sending a break */
+ for (; j <= 4; j++)
+ {
+ switch (j)
+ {
+ case 0: /* First, try sending a CR */
+ SERIAL_FLUSH_INPUT (mips_desc);
+ SERIAL_WRITE (mips_desc, "\015", 1);
+ break;
+ case 1: /* First, try sending a break */
+ SERIAL_SEND_BREAK (mips_desc);
+ break;
+ case 2: /* Then, try a ^C */
+ SERIAL_WRITE (mips_desc, "\003", 1);
+ break;
+ case 3: /* Then, try escaping from download */
+ {
+ if (mips_monitor == MON_PMON)
+ {
+ char tbuff[7];
+
+ /* We shouldn't need to send multiple termination
+ sequences, since the target performs line (or
+ block) reads, and then processes those
+ packets. In-case we were downloading a large packet
+ we flush the output buffer before inserting a
+ termination sequence. */
+ SERIAL_FLUSH_OUTPUT (mips_desc);
+ sprintf (tbuff, "\015/E/E\015");
+ SERIAL_WRITE (mips_desc, tbuff, 6);
+ }
+ else
+ {
+ char srec[10];
+ int i;
+
+ /* We are possibly in binary download mode, having
+ aborted in the middle of an S-record. ^C won't
+ work because of binary mode. The only reliable way
+ out is to send enough termination packets (8 bytes)
+ to fill up and then overflow the largest size
+ S-record (255 bytes in this case). This amounts to
+ 256/8 + 1 packets.
+ */
+
+ mips_make_srec (srec, '7', 0, NULL, 0);
+
+ for (i = 1; i <= 33; i++)
+ {
+ SERIAL_WRITE (mips_desc, srec, 8);
+
+ if (SERIAL_READCHAR (mips_desc, 0) >= 0)
+ break; /* Break immediatly if we get something from
+ the board. */
+ }
+ }
+ }
+ break;
+ case 4:
+ mips_error ("Failed to initialize.");
+ }
- hold_wait = mips_receive_wait;
- mips_receive_wait = 3;
+ if (mips_expect (mips_monitor_prompt))
+ break;
+ }
- tries = 0;
- while (catch_errors (mips_receive_packet, buff, (char *) NULL,
- RETURN_MASK_ALL)
- == 0)
+ if (mips_monitor == MON_PMON)
{
- char cc;
+ /* Ensure the correct target state: */
+ mips_send_command ("set regsize 64\015", -1);
+ mips_send_command ("set hostport tty0\015", -1);
+ mips_send_command ("set brkcmd \"\"\015", -1);
+ /* Delete all the current breakpoints: */
+ mips_send_command ("db *\015", -1);
+ /* NOTE: PMON does not have breakpoint support through the
+ "debug" mode, only at the monitor command-line. */
+ }
- if (tries > 0)
- error ("Could not connect to target");
- ++tries;
+ mips_enter_debug ();
- /* We did not receive the packet we expected; try resetting the
- board and trying again. */
- printf_filtered ("Failed to initialize; trying to reset board\n");
- cc = '\003';
- SERIAL_WRITE (mips_desc, &cc, 1);
- sleep (2);
- SERIAL_WRITE (mips_desc, "\rdb tty0\r", sizeof "\rdb tty0\r" - 1);
- sleep (1);
- cr = '\r';
- SERIAL_WRITE (mips_desc, &cr, 1);
- }
+ /* Clear all breakpoints: */
+ if (common_breakpoint ('b', -1, 0, NULL))
+ monitor_supports_breakpoints = 0;
+ else
+ monitor_supports_breakpoints = 1;
- mips_receive_wait = hold_wait;
- mips_initializing = 0;
+ do_cleanups (old_cleanups);
/* If this doesn't call error, we have connected; we don't care if
the request itself succeeds or fails. */
- mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err);
+
+ mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err,
+ mips_receive_wait, NULL);
+ set_current_frame (create_new_frame (read_fp (), read_pc ()));
+ select_frame (get_current_frame (), 0);
}
/* Open a connection to the remote board. */
-
static void
-mips_open (name, from_tty)
+common_open (ops, name, from_tty)
+ struct target_ops *ops;
char *name;
int from_tty;
{
+ char *ptype;
+
if (name == 0)
error (
"To open a MIPS remote debugging connection, you need to specify what serial\n\
target_preopen (from_tty);
if (mips_is_open)
- unpush_target (&mips_ops);
+ unpush_target (current_ops);
mips_desc = SERIAL_OPEN (name);
if (mips_desc == (serial_t) NULL)
perror_with_name (name);
+ if (baud_rate != -1)
+ {
+ if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
+ {
+ SERIAL_CLOSE (mips_desc);
+ perror_with_name (name);
+ }
+ }
+
SERIAL_RAW (mips_desc);
+ current_ops = ops;
mips_is_open = 1;
mips_initialize ();
if (from_tty)
printf_unfiltered ("Remote MIPS debugging using %s\n", name);
- push_target (&mips_ops); /* Switch to using remote target now */
+
+ /* Switch to using remote target now. */
+ push_target (ops);
/* FIXME: Should we call start_remote here? */
+
+ /* Try to figure out the processor model if possible. */
+ ptype = mips_read_processor_type ();
+ if (ptype)
+ mips_set_processor_type_command (strsave (ptype), 0);
+
+/* This is really the job of start_remote however, that makes an assumption
+ that the target is about to print out a status message of some sort. That
+ doesn't happen here (in fact, it may not be possible to get the monitor to
+ send the appropriate packet). */
+
+ flush_cached_frames ();
+ registers_changed ();
+ stop_pc = read_pc ();
+ set_current_frame (create_new_frame (read_fp (), stop_pc));
+ select_frame (get_current_frame (), 0);
+ print_stack_frame (selected_frame, -1, 1);
+}
+
+static void
+mips_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ mips_monitor = MON_IDT;
+ common_open (&mips_ops, name, from_tty);
+}
+
+static void
+pmon_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ /* The PMON monitor has a prompt different from the default
+ "TARGET_MONITOR_PROMPT": */
+ mips_monitor_prompt = "PMON> ";
+ mips_monitor = MON_PMON;
+ common_open (&pmon_ops, name, from_tty);
}
+
/* Close a connection to the remote board. */
static void
mips_is_open = 0;
/* Get the board out of remote debugging mode. */
- mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err);
+ (void) mips_exit_debug ();
SERIAL_CLOSE (mips_desc);
}
error ("Argument given to \"detach\" when remotely debugging.");
pop_target ();
+
+ mips_close (1);
+
if (from_tty)
printf_unfiltered ("Ending remote MIPS debugging.\n");
}
static void
mips_resume (pid, step, siggnal)
- int pid, step, siggnal;
+ int pid, step;
+ enum target_signal siggnal;
{
- if (siggnal)
- error ("Can't send signals to a remote system. Try `handle %d ignore'.",
- siggnal);
+
+/* start-sanitize-gm */
+#ifndef GENERAL_MAGIC
+ if (siggnal != TARGET_SIGNAL_0)
+ warning
+ ("Can't send signals to a remote system. Try `handle %s ignore'.",
+ target_signal_to_name (siggnal));
+#endif /* GENERAL_MAGIC */
+/* end-sanitize-gm */
mips_request (step ? 's' : 'c',
(unsigned int) 1,
- (unsigned int) 0,
- (int *) NULL);
+ (unsigned int) siggnal,
+ (int *) NULL,
+ mips_receive_wait, NULL);
+}
+
+/* Return the signal corresponding to SIG, where SIG is the number which
+ the MIPS protocol uses for the signal. */
+enum target_signal
+mips_signal_from_protocol (sig)
+ int sig;
+{
+ /* We allow a few more signals than the IDT board actually returns, on
+ the theory that there is at least *some* hope that perhaps the numbering
+ for these signals is widely agreed upon. */
+ if (sig <= 0
+ || sig > 31)
+ return TARGET_SIGNAL_UNKNOWN;
+
+ /* Don't want to use target_signal_from_host because we are converting
+ from MIPS signal numbers, not host ones. Our internal numbers
+ match the MIPS numbers for the signals the board can return, which
+ are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
+ return (enum target_signal) sig;
}
/* Wait until the remote stops, and return a wait status. */
static int
mips_wait (pid, status)
int pid;
- WAITTYPE *status;
+ struct target_waitstatus *status;
{
int rstatus;
int err;
+ char buff[DATA_MAXLEN];
+ int rpc, rfp, rsp;
+ char flags[20];
+ int nfields;
+
+ interrupt_count = 0;
+ hit_watchpoint = 0;
/* If we have not sent a single step or continue command, then the
board is waiting for us to do something. Return a status
indicating that it is stopped. */
if (! mips_need_reply)
{
- WSETSTOP (*status, SIGTRAP);
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = TARGET_SIGNAL_TRAP;
return 0;
}
- rstatus = mips_request ('\0', (unsigned int) 0, (unsigned int) 0, &err);
+ /* No timeout; we sit here as long as the program continues to execute. */
+ mips_wait_flag = 1;
+ rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1,
+ buff);
+ mips_wait_flag = 0;
if (err)
- error ("Remote failure: %s", safe_strerror (errno));
+ mips_error ("Remote failure: %s", safe_strerror (errno));
- /* FIXME: The target board uses numeric signal values which are
- those used on MIPS systems. If the host uses different signal
- values, we need to translate here. I believe all Unix systems
- use the same values for the signals the board can return, which
- are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
+ nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
+ &rpc, &rfp, &rsp, flags);
- /* FIXME: The target board uses a standard Unix wait status int. If
- the host system does not, we must translate here. */
+ /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
- *status = rstatus;
+ if (nfields == 7 || nfields == 9)
+ {
+ char buf[MAX_REGISTER_RAW_SIZE];
- return 0;
-}
+ store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc);
+ supply_register (PC_REGNUM, buf);
-/* We have to map between the register numbers used by gdb and the
- register numbers used by the debugging protocol. This function
- assumes that we are using tm-mips.h. */
+ store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp);
+ supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
-#define REGNO_OFFSET 96
+ store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp);
+ supply_register (SP_REGNUM, buf);
+
+ store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0);
+ supply_register (FP_REGNUM, buf);
+
+ if (nfields == 9)
+ {
+ int i;
+
+ for (i = 0; i <= 2; i++)
+ if (flags[i] == 'r' || flags[i] == 'w')
+ hit_watchpoint = 1;
+ else if (flags[i] == '\000')
+ break;
+ }
+ }
+
+ /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
+ and so on, because the constants we want here are determined by the
+ MIPS protocol and have nothing to do with what host we are running on. */
+ if ((rstatus & 0377) == 0)
+ {
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = (((rstatus) >> 8) & 0377);
+ }
+ else if ((rstatus & 0377) == 0177)
+ {
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377);
+ }
+ else
+ {
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = mips_signal_from_protocol (rstatus & 0177);
+ }
+
+ return 0;
+}
static int
-mips_map_regno (regno)
- int regno;
+pmon_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
{
- if (regno < 32)
- return regno;
- if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
- return regno - FP0_REGNUM + 32;
- switch (regno)
- {
+ int rstatus;
+ int err;
+ char buff[DATA_MAXLEN];
+
+ interrupt_count = 0;
+ hit_watchpoint = 0;
+
+ /* If we have not sent a single step or continue command, then the
+ board is waiting for us to do something. Return a status
+ indicating that it is stopped. */
+ if (! mips_need_reply)
+ {
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = TARGET_SIGNAL_TRAP;
+ return 0;
+ }
+
+ /* Sit, polling the serial until the target decides to talk to
+ us. NOTE: the timeout value we use is used not just for the
+ first character, but for all the characters. */
+ mips_wait_flag = 1;
+ rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1,
+ buff);
+ mips_wait_flag = 0;
+ if (err)
+ mips_error ("Remote failure: %s", safe_strerror (errno));
+
+ /* NOTE: The following (sig) numbers are defined by PMON:
+ SPP_SIGTRAP 5 breakpoint
+ SPP_SIGINT 2
+ SPP_SIGSEGV 11
+ SPP_SIGBUS 10
+ SPP_SIGILL 4
+ SPP_SIGFPE 8
+ SPP_SIGTERM 15 */
+
+ /* On returning from a continue, the PMON monitor seems to start
+ echoing back the messages we send prior to sending back the
+ ACK. The code can cope with this, but to try and avoid the
+ unnecessary serial traffic, and "spurious" characters displayed
+ to the user, we cheat and reset the debug protocol. The problems
+ seems to be caused by a check on the number of arguments, and the
+ command length, within the monitor causing it to echo the command
+ as a bad packet. */
+ mips_exit_debug ();
+ mips_enter_debug ();
+
+ /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
+ and so on, because the constants we want here are determined by the
+ MIPS protocol and have nothing to do with what host we are running on. */
+ if ((rstatus & 0377) == 0)
+ {
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = (((rstatus) >> 8) & 0377);
+ }
+ else if ((rstatus & 0377) == 0177)
+ {
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377);
+ }
+ else
+ {
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = mips_signal_from_protocol (rstatus & 0177);
+ }
+
+ return 0;
+}
+
+/* We have to map between the register numbers used by gdb and the
+ register numbers used by the debugging protocol. This function
+ assumes that we are using tm-mips.h. */
+
+#define REGNO_OFFSET 96
+
+static int
+mips_map_regno (regno)
+ int regno;
+{
+ if (regno < 32)
+ return regno;
+ if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
+ return regno - FP0_REGNUM + 32;
+ switch (regno)
+ {
case PC_REGNUM:
return REGNO_OFFSET + 0;
case CAUSE_REGNUM:
return;
}
- val = mips_request ('r', (unsigned int) mips_map_regno (regno),
- (unsigned int) 0, &err);
- if (err)
- error ("Can't read register %d: %s", regno, safe_strerror (errno));
+ if (regno == FP_REGNUM || regno == ZERO_REGNUM)
+ /* FP_REGNUM on the mips is a hack which is just supposed to read
+ zero (see also mips-nat.c). */
+ val = 0;
+ else
+ {
+#if 0 /* Unfortunately the PMON version in the Vr4300 board has been
+ compiled without the 64bit register access commands. This
+ means we cannot get hold of the full register width. */
+ if (mips_monitor == MON_PMON)
+ val = mips_request ('t', (unsigned int) mips_map_regno (regno),
+ (unsigned int) 0, &err, mips_receive_wait, NULL);
+ else
+#endif
+ val = mips_request ('r', (unsigned int) mips_map_regno (regno),
+ (unsigned int) 0, &err, mips_receive_wait, NULL);
+ if (err)
+ mips_error ("Can't read register %d: %s", regno,
+ safe_strerror (errno));
+ }
{
char buf[MAX_REGISTER_RAW_SIZE];
mips_request ('R', (unsigned int) mips_map_regno (regno),
(unsigned int) read_register (regno),
- &err);
+ &err, mips_receive_wait, NULL);
if (err)
- error ("Can't write register %d: %s", regno, safe_strerror (errno));
+ mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
}
/* Fetch a word from the target board. */
int val;
int err;
- val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err);
+ val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err,
+ mips_receive_wait, NULL);
if (err)
{
/* Data space failed; try instruction space. */
- val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err);
+ val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err,
+ mips_receive_wait, NULL);
if (err)
- error ("Can't read address 0x%x: %s", addr, safe_strerror (errno));
+ mips_error ("Can't read address 0x%x: %s", addr, safe_strerror (errno));
}
return val;
}
-/* Store a word to the target board. */
+/* Store a word to the target board. Returns errno code or zero for
+ success. If OLD_CONTENTS is non-NULL, put the old contents of that
+ memory location there. */
-static void
-mips_store_word (addr, val)
+static int
+mips_store_word (addr, val, old_contents)
CORE_ADDR addr;
int val;
+ char *old_contents;
{
int err;
+ unsigned int oldcontents;
- mips_request ('D', (unsigned int) addr, (unsigned int) val, &err);
+ oldcontents = mips_request ('D', (unsigned int) addr, (unsigned int) val,
+ &err,
+ mips_receive_wait, NULL);
if (err)
{
/* Data space failed; try instruction space. */
- mips_request ('I', (unsigned int) addr, (unsigned int) val, &err);
+ oldcontents = mips_request ('I', (unsigned int) addr,
+ (unsigned int) val, &err,
+ mips_receive_wait, NULL);
if (err)
- error ("Can't write address 0x%x: %s", addr, safe_strerror (errno));
+ return errno;
}
+ if (old_contents != NULL)
+ store_unsigned_integer (old_contents, 4, oldcontents);
+ return 0;
}
/* Read or write LEN bytes from inferior memory at MEMADDR,
/* Allocate buffer of that many longwords. */
register char *buffer = alloca (count * 4);
+ int status;
+
if (write)
{
/* Fill start and end extra bytes of buffer with existing data. */
for (i = 0; i < count; i++, addr += 4)
{
- mips_store_word (addr, extract_unsigned_integer (&buffer[i*4], 4));
+ status = mips_store_word (addr,
+ extract_unsigned_integer (&buffer[i*4], 4),
+ NULL);
+ /* Report each kilobyte (we download 32-bit words at a time) */
+ if (i % 256 == 255)
+ {
+ printf_unfiltered ("*");
+ fflush (stdout);
+ }
+ if (status)
+ {
+ errno = status;
+ return 0;
+ }
/* FIXME: Do we want a QUIT here? */
}
+ if (count >= 256)
+ printf_unfiltered ("\n");
}
else
{
static void
mips_kill ()
{
+ if (!mips_wait_flag)
+ return;
+
+ interrupt_count++;
+
+ if (interrupt_count >= 2)
+ {
+ interrupt_count = 0;
+
+ target_terminal_ours ();
+
+ if (query ("Interrupted while waiting for the program.\n\
+Give up (and stop debugging it)? "))
+ {
+ /* Clean up in such a way that mips_close won't try to talk to the
+ board (it almost surely won't work since we weren't able to talk to
+ it). */
+ mips_wait_flag = 0;
+ mips_is_open = 0;
+ SERIAL_CLOSE (mips_desc);
+
+ printf_unfiltered ("Ending remote MIPS debugging.\n");
+ target_mourn_inferior ();
+
+ return_to_top_level (RETURN_QUIT);
+ }
+
+ target_terminal_inferior ();
+ }
+
+ if (remote_debug > 0)
+ printf_unfiltered ("Sending break\n");
+
+ SERIAL_SEND_BREAK (mips_desc);
+
#if 0
if (mips_is_open)
{
CORE_ADDR entry_pt;
if (args && *args)
- error ("Can't pass arguments to remote MIPS board.");
+ {
+ warning ("\
+Can't pass arguments to remote MIPS board; arguments ignored.");
+ /* And don't try to use them on the next "run" command. */
+ execute_command ("set args", 0);
+ }
if (execfile == 0 || exec_bfd == 0)
- error ("No exec file specified");
+ error ("No executable file specified");
entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
/* FIXME: Should we set inferior_pid here? */
- proceed (entry_pt, -1, 0);
+/* start-sanitize-gm */
+#ifdef GENERAL_MAGIC
+ magic_create_inferior_hook ();
+ proceed (entry_pt, TARGET_SIGNAL_PWR, 0);
+#else
+/* end-sanitize-gm */
+ proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
+/* start-sanitize-gm */
+#endif /* GENERAL_MAGIC */
+/* end-sanitize-gm */
}
/* Clean up after a process. Actually nothing to do. */
static void
mips_mourn_inferior ()
{
- unpush_target (&mips_ops);
+ if (current_ops != NULL)
+ unpush_target (current_ops);
generic_mourn_inferior ();
}
\f
+/* We can write a breakpoint and read the shadow contents in one
+ operation. */
+
+/* The IDT board uses an unusual breakpoint value, and sometimes gets
+ confused when it sees the usual MIPS breakpoint instruction. */
+
+#define BREAK_INSN (0x00000a0d)
+#define BREAK_INSN_SIZE (4)
+
+/* Insert a breakpoint on targets that don't have any better breakpoint
+ support. We read the contents of the target location and stash it,
+ then overwrite it with a breakpoint instruction. ADDR is the target
+ location in the target machine. CONTENTS_CACHE is a pointer to
+ memory allocated for saving the target contents. It is guaranteed
+ by the caller to be long enough to save sizeof BREAKPOINT bytes (this
+ is accomplished via BREAKPOINT_MAX). */
+
+static int
+mips_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ int status;
+
+ if (monitor_supports_breakpoints)
+ return common_breakpoint ('B', addr, 0x3, "f");
+
+ return mips_store_word (addr, BREAK_INSN, contents_cache);
+}
+
+static int
+mips_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ if (monitor_supports_breakpoints)
+ return common_breakpoint ('b', addr, 0, NULL);
+
+ return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
+}
+
+#if 0 /* currently not used */
+/* PMON does not currently provide support for the debug mode 'b'
+ commands to manipulate breakpoints. However, if we wanted to use
+ the monitor breakpoints (rather than the GDB BREAK_INSN version)
+ then this code performs the work needed to leave debug mode,
+ set/clear the breakpoint, and then return to debug mode. */
+
+#define PMON_MAX_BP (33) /* 32 SW, 1 HW */
+static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
+/* NOTE: The code relies on this vector being zero-initialised by the system */
+
+static int
+pmon_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ int status;
+
+ if (monitor_supports_breakpoints)
+ {
+ char tbuff[12]; /* space for breakpoint command */
+ int bpnum;
+ CORE_ADDR bpaddr;
+
+ /* PMON does not support debug level breakpoint set/remove: */
+ if (mips_exit_debug ())
+ mips_error ("Failed to exit debug mode");
+
+ sprintf (tbuff, "b %08x\015", addr);
+ mips_send_command (tbuff, 0);
+
+ mips_expect ("Bpt ");
+
+ if (!mips_getstring (tbuff, 2))
+ return 1;
+ tbuff[2] = '\0'; /* terminate the string */
+ if (sscanf (tbuff, "%d", &bpnum) != 1)
+ {
+ fprintf_unfiltered (stderr, "Invalid decimal breakpoint number from target: %s\n", tbuff);
+ return 1;
+ }
+
+ mips_expect (" = ");
+
+ /* Lead in the hex number we are expecting: */
+ tbuff[0] = '0';
+ tbuff[1] = 'x';
+
+ if (!mips_getstring (&tbuff[2], 8))
+ return 1;
+ tbuff[10] = '\0'; /* terminate the string */
+
+ if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
+ {
+ fprintf_unfiltered (stderr, "Invalid hex address from target: %s\n", tbuff);
+ return 1;
+ }
+
+ if (bpnum >= PMON_MAX_BP)
+ {
+ fprintf_unfiltered (stderr, "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
+ bpnum, PMON_MAX_BP - 1);
+ return 1;
+ }
+
+ if (bpaddr != addr)
+ fprintf_unfiltered (stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
+
+ mips_pmon_bp_info[bpnum] = bpaddr;
+
+ mips_expect ("\015\012");
+ mips_expect (mips_monitor_prompt);
+
+ mips_enter_debug ();
+
+ return 0;
+ }
+
+ return mips_store_word (addr, BREAK_INSN, contents_cache);
+}
+
+static int
+pmon_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ if (monitor_supports_breakpoints)
+ {
+ int bpnum;
+ char tbuff[7]; /* enough for delete breakpoint command */
+
+ for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
+ if (mips_pmon_bp_info[bpnum] == addr)
+ break;
+
+ if (bpnum >= PMON_MAX_BP)
+ {
+ fprintf_unfiltered (stderr, "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%x\n", addr);
+ return 1;
+ }
+
+ if (mips_exit_debug ())
+ mips_error ("Failed to exit debug mode");
+
+ sprintf (tbuff, "db %02d\015", bpnum);
+
+ mips_send_command (tbuff, -1);
+ /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
+ set" message will be returned. */
+
+ mips_enter_debug ();
+
+ return 0;
+ }
+
+ return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
+}
+#endif
+
+/* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
+ This is used for memory ref breakpoints. */
+
+static unsigned long
+calculate_mask (addr, len)
+ CORE_ADDR addr;
+ int len;
+{
+ unsigned long mask;
+ int i;
+
+ mask = addr ^ (addr + len - 1);
+
+ for (i = 32; i >= 0; i--)
+ if (mask == 0)
+ break;
+ else
+ mask >>= 1;
+
+ mask = (unsigned long) 0xffffffff >> i;
+
+ return mask;
+}
+
+/* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is either 1
+ for a read watchpoint, or 2 for a read/write watchpoint. */
+
+int
+remote_mips_set_watchpoint (addr, len, type)
+ CORE_ADDR addr;
+ int len;
+ int type;
+{
+ CORE_ADDR first_addr;
+ unsigned long mask;
+ char *flags;
+
+ mask = calculate_mask (addr, len);
+
+ first_addr = addr & ~mask;
+
+ switch (type)
+ {
+ case 0: /* write */
+ flags = "w";
+ break;
+ case 1: /* read */
+ flags = "r";
+ break;
+ case 2: /* read/write */
+ flags = "rw";
+ break;
+ default:
+ abort ();
+ }
+
+ if (common_breakpoint ('B', first_addr, mask, flags))
+ return -1;
+
+ return 0;
+}
+
+int
+remote_mips_remove_watchpoint (addr, len, type)
+ CORE_ADDR addr;
+ int len;
+ int type;
+{
+ CORE_ADDR first_addr;
+ unsigned long mask;
+
+ mask = calculate_mask (addr, len);
+
+ first_addr = addr & ~mask;
+
+ if (common_breakpoint ('b', first_addr, 0, NULL))
+ return -1;
+
+ return 0;
+}
+
+int
+remote_mips_stopped_by_watchpoint ()
+{
+ return hit_watchpoint;
+}
+
+/* This routine generates the a breakpoint command of the form:
+
+ 0x0 <CMD> <ADDR> <MASK> <FLAGS>
+
+ Where <CMD> is one of: `B' to set, or `b' to clear a breakpoint. <ADDR> is
+ the address of the breakpoint. <MASK> is a don't care mask for addresses.
+ <FLAGS> is any combination of `r', `w', or `f' for read/write/or fetch. */
+
+static int
+common_breakpoint (cmd, addr, mask, flags)
+ int cmd;
+ CORE_ADDR addr;
+ CORE_ADDR mask;
+ char *flags;
+{
+ int len;
+ char buf[DATA_MAXLEN + 1];
+ char rcmd;
+ int rpid, rerrflg, rresponse;
+ int nfields;
+
+ if (flags)
+ sprintf (buf, "0x0 %c 0x%x 0x%x %s", cmd, addr, mask, flags);
+ else
+ sprintf (buf, "0x0 %c 0x%x", cmd, addr);
+
+ mips_send_packet (buf, 1);
+
+ len = mips_receive_packet (buf, 1, mips_receive_wait);
+ buf[len] = '\0';
+
+ nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", &rpid, &rcmd, &rerrflg, &rresponse);
+
+ if (nfields != 4
+ || rcmd != cmd)
+ mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
+
+ if (rerrflg != 0)
+ {
+ if (rresponse != 22) /* invalid argument */
+ fprintf_unfiltered (stderr, "common_breakpoint (0x%x): Got error: 0x%x\n",
+ addr, rresponse);
+ return 1;
+ }
+
+ return 0;
+}
+\f
+static void
+send_srec (srec, len, addr)
+ char *srec;
+ int len;
+ CORE_ADDR addr;
+{
+ while (1)
+ {
+ int ch;
+
+ SERIAL_WRITE (mips_desc, srec, len);
+
+ ch = mips_readchar (2);
+
+ switch (ch)
+ {
+ case SERIAL_TIMEOUT:
+ error ("Timeout during download.");
+ break;
+ case 0x6: /* ACK */
+ return;
+ case 0x15: /* NACK */
+ fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr);
+ continue;
+ default:
+ error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
+ }
+ }
+}
+
+/* Download a binary file by converting it to S records. */
+
+static void
+mips_load_srec (args)
+ char *args;
+{
+ bfd *abfd;
+ asection *s;
+ char *buffer, srec[1024];
+ int i;
+ int srec_frame = 200;
+ int reclen;
+ static int hashmark = 1;
+
+ buffer = alloca (srec_frame * 2 + 256);
+
+ abfd = bfd_openr (args, 0);
+ if (!abfd)
+ {
+ printf_filtered ("Unable to open file %s\n", args);
+ return;
+ }
+
+ if (bfd_check_format (abfd, bfd_object) == 0)
+ {
+ printf_filtered ("File is not an object file\n");
+ return;
+ }
+
+/* This actually causes a download in the IDT binary format: */
+#define LOAD_CMD "load -b -s tty0\015"
+ mips_send_command (LOAD_CMD, 0);
+
+ for (s = abfd->sections; s; s = s->next)
+ {
+ if (s->flags & SEC_LOAD)
+ {
+ int numbytes;
+
+ printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma,
+ s->vma + s->_raw_size);
+ gdb_flush (gdb_stdout);
+
+ for (i = 0; i < s->_raw_size; i += numbytes)
+ {
+ numbytes = min (srec_frame, s->_raw_size - i);
+
+ bfd_get_section_contents (abfd, s, buffer, i, numbytes);
+
+ reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
+ send_srec (srec, reclen, s->vma + i);
+
+ if (hashmark)
+ {
+ putchar_unfiltered ('#');
+ gdb_flush (gdb_stdout);
+ }
+
+ } /* Per-packet (or S-record) loop */
+
+ putchar_unfiltered ('\n');
+ } /* Loadable sections */
+ }
+ if (hashmark)
+ putchar_unfiltered ('\n');
+
+ /* Write a type 7 terminator record. no data for a type 7, and there
+ is no data, so len is 0. */
+
+ reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
+
+ send_srec (srec, reclen, abfd->start_address);
+
+ SERIAL_FLUSH_INPUT (mips_desc);
+}
+
+/*
+ * mips_make_srec -- make an srecord. This writes each line, one at a
+ * time, each with it's own header and trailer line.
+ * An srecord looks like this:
+ *
+ * byte count-+ address
+ * start ---+ | | data +- checksum
+ * | | | |
+ * S01000006F6B692D746573742E73726563E4
+ * S315000448600000000000000000FC00005900000000E9
+ * S31A0004000023C1400037DE00F023604000377B009020825000348D
+ * S30B0004485A0000000000004E
+ * S70500040000F6
+ *
+ * S<type><length><address><data><checksum>
+ *
+ * Where
+ * - length
+ * is the number of bytes following upto the checksum. Note that
+ * this is not the number of chars following, since it takes two
+ * chars to represent a byte.
+ * - type
+ * is one of:
+ * 0) header record
+ * 1) two byte address data record
+ * 2) three byte address data record
+ * 3) four byte address data record
+ * 7) four byte address termination record
+ * 8) three byte address termination record
+ * 9) two byte address termination record
+ *
+ * - address
+ * is the start address of the data following, or in the case of
+ * a termination record, the start address of the image
+ * - data
+ * is the data.
+ * - checksum
+ * is the sum of all the raw byte data in the record, from the length
+ * upwards, modulo 256 and subtracted from 255.
+ *
+ * This routine returns the length of the S-record.
+ *
+ */
+
+static int
+mips_make_srec (buf, type, memaddr, myaddr, len)
+ char *buf;
+ int type;
+ CORE_ADDR memaddr;
+ unsigned char *myaddr;
+ int len;
+{
+ unsigned char checksum;
+ int i;
+
+ /* Create the header for the srec. addr_size is the number of bytes in the address,
+ and 1 is the number of bytes in the count. */
+
+ buf[0] = 'S';
+ buf[1] = type;
+ buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
+ /* This assumes S3 style downloads (4byte addresses). There should
+ probably be a check, or the code changed to make it more
+ explicit. */
+ buf[3] = memaddr >> 24;
+ buf[4] = memaddr >> 16;
+ buf[5] = memaddr >> 8;
+ buf[6] = memaddr;
+ memcpy (&buf[7], myaddr, len);
+
+ /* Note that the checksum is calculated on the raw data, not the
+ hexified data. It includes the length, address and the data
+ portions of the packet. */
+ checksum = 0;
+ buf += 2; /* Point at length byte */
+ for (i = 0; i < len + 4 + 1; i++)
+ checksum += *buf++;
+
+ *buf = ~checksum;
+
+ return len + 8;
+}
+
+/* The following manifest controls whether we enable the simple flow
+ control support provided by the monitor. If enabled the code will
+ wait for an affirmative ACK between transmitting packets. */
+#define DOETXACK (1)
+
+/* The PMON fast-download uses an encoded packet format constructed of
+ 3byte data packets (encoded as 4 printable ASCII characters), and
+ escape sequences (preceded by a '/'):
+
+ 'K' clear checksum
+ 'C' compare checksum (12bit value, not included in checksum calculation)
+ 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
+ 'Z' zero fill multiple of 3bytes
+ 'B' byte (12bit encoded value, of 8bit data)
+ 'A' address (36bit encoded value)
+ 'E' define entry as original address, and exit load
+
+ The packets are processed in 4 character chunks, so the escape
+ sequences that do not have any data (or variable length data)
+ should be padded to a 4 character boundary. The decoder will give
+ an error if the complete message block size is not a multiple of
+ 4bytes (size of record).
+
+ The encoding of numbers is done in 6bit fields. The 6bit value is
+ used to index into this string to get the specific character
+ encoding for the value: */
+static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
+
+/* Convert the number of bits required into an encoded number, 6bits
+ at a time (range 0..63). Keep a checksum if required (passed
+ pointer non-NULL). The function returns the number of encoded
+ characters written into the buffer. */
+static int
+pmon_makeb64 (v, p, n, chksum)
+ unsigned long v;
+ char *p;
+ int n;
+ int *chksum;
+{
+ int count = (n / 6);
+
+ if ((n % 12) != 0) {
+ fprintf_unfiltered(stderr,"Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n,(n == 1)?"":"s");
+ return(0);
+ }
+ if (n > 36) {
+ fprintf_unfiltered(stderr,"Fast encoding cannot process more than 36bits at the moment: %dbits\n",n);
+ return(0);
+ }
+
+ /* Deal with the checksum: */
+ if (chksum != NULL) {
+ switch (n) {
+ case 36: *chksum += ((v >> 24) & 0xFFF);
+ case 24: *chksum += ((v >> 12) & 0xFFF);
+ case 12: *chksum += ((v >> 0) & 0xFFF);
+ }
+ }
+
+ do {
+ n -= 6;
+ *p++ = encoding[(v >> n) & 0x3F];
+ } while (n > 0);
+
+ return(count);
+}
+
+/* Shorthand function (that could be in-lined) to output the zero-fill
+ escape sequence into the data stream. */
+static int
+pmon_zeroset (recsize, buff, amount, chksum)
+ int recsize;
+ char **buff;
+ int *amount;
+ unsigned int *chksum;
+{
+ int count;
+
+ sprintf(*buff,"/Z");
+ count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
+ *buff += (count + 2);
+ *amount = 0;
+ return(recsize + count + 2);
+}
+
+static int
+pmon_checkset (recsize, buff, value)
+ int recsize;
+ char **buff;
+ int *value;
+{
+ int count;
+
+ /* Add the checksum (without updating the value): */
+ sprintf (*buff, "/C");
+ count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
+ *buff += (count + 2);
+ sprintf (*buff, "\015");
+ *buff += 2; /* include zero terminator */
+ /* Forcing a checksum validation clears the sum: */
+ *value = 0;
+ return(recsize + count + 3);
+}
+
+/* Amount of padding we leave after at the end of the output buffer,
+ for the checksum and line termination characters: */
+#define CHECKSIZE (4 + 4 + 4 + 2)
+/* zero-fill, checksum, transfer end and line termination space. */
+
+/* The amount of binary data loaded from the object file in a single
+ operation: */
+#define BINCHUNK (1024)
+
+/* Maximum line of data accepted by the monitor: */
+#define MAXRECSIZE (550)
+/* NOTE: This constant depends on the monitor being used. This value
+ is for PMON 5.x on the Cogent Vr4300 board. */
+
+static void
+pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill)
+ char **outbuf;
+ unsigned char *inbuf;
+ int *inptr;
+ int inamount;
+ int *recsize;
+ unsigned int *csum;
+ unsigned int *zerofill;
+{
+ int count = 0;
+ char *p = *outbuf;
+
+ /* This is a simple check to ensure that our data will fit within
+ the maximum allowable record size. Each record output is 4bytes
+ in length. We must allow space for a pending zero fill command,
+ the record, and a checksum record. */
+ while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) {
+ /* Process the binary data: */
+ if ((inamount - *inptr) < 3) {
+ if (*zerofill != 0)
+ *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
+ sprintf (p, "/B");
+ count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
+ p += (2 + count);
+ *recsize += (2 + count);
+ (*inptr)++;
+ } else {
+ unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
+ /* Simple check for zero data. TODO: A better check would be
+ to check the last, and then the middle byte for being zero
+ (if the first byte is not). We could then check for
+ following runs of zeros, and if above a certain size it is
+ worth the 4 or 8 character hit of the byte insertions used
+ to pad to the start of the zeroes. NOTE: This also depends
+ on the alignment at the end of the zero run. */
+ if (value == 0x00000000) {
+ (*zerofill)++;
+ if (*zerofill == 0xFFF) /* 12bit counter */
+ *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
+ }else {
+ if (*zerofill != 0)
+ *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
+ count = pmon_makeb64 (value, p, 24, csum);
+ p += count;
+ *recsize += count;
+ }
+ *inptr += 3;
+ }
+ }
+
+ *outbuf = p;
+ return;
+}
+
+#if defined(DOETXACK)
+static int
+pmon_check_ack()
+{
+ int c = SERIAL_READCHAR (mips_desc, 2);
+ if ((c == SERIAL_TIMEOUT) || (c != 0x06)) {
+ fprintf_unfiltered (gdb_stderr, "Failed to receive valid ACK\n");
+ return(-1); /* terminate the download */
+ }
+ return(0);
+}
+#endif /* DOETXACK */
+
+static void
+pmon_load_fast (file)
+ char *file;
+{
+ bfd *abfd;
+ asection *s;
+ unsigned char *binbuf;
+ char *buffer;
+ int reclen;
+ unsigned int csum = 0;
+ static int hashmark = 1;
+ int bintotal = 0;
+ int final;
+ int finished = 0;
+
+ buffer = (char *)xmalloc(MAXRECSIZE + 1);
+ binbuf = (unsigned char *)xmalloc(BINCHUNK);
+
+ abfd = bfd_openr(file,0);
+ if (!abfd)
+ {
+ printf_filtered ("Unable to open file %s\n",file);
+ return;
+ }
+
+ if (bfd_check_format(abfd,bfd_object) == 0)
+ {
+ printf_filtered("File is not an object file\n");
+ return;
+ }
+
+ /* Setup the required download state: */
+ mips_send_command ("set dlproto etxack\015", -1);
+ mips_send_command ("set dlecho off\015", -1);
+ /* NOTE: We get a "cannot set variable" message if the variable is
+ already defined to have the argument we give. The code doesn't
+ care, since it just scans to the next prompt anyway. */
+ /* Start the download: */
+ mips_send_command (LOAD_CMD, 0);
+ mips_expect ("Downloading from tty0, ^C to abort\015\012");
+
+ /* Zero the checksum */
+ sprintf(buffer,"/Kxx\015");
+ reclen = strlen(buffer);
+ SERIAL_WRITE (mips_desc, buffer, reclen);
+
+#if defined(DOETXACK)
+ finished = pmon_check_ack();
+#endif /* DOETXACK */
+
+ for (s = abfd->sections; s && !finished; s = s->next)
+ if (s->flags & SEC_LOAD) /* only deal with loadable sections */
+ {
+ bintotal += s->_raw_size;
+ final = (s->vma + s->_raw_size);
+
+ printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma,
+ s->vma + s->_raw_size);
+ gdb_flush (gdb_stdout);
+
+ /* Output the starting address */
+ sprintf(buffer,"/A");
+ reclen = pmon_makeb64(s->vma,&buffer[2],36,&csum);
+ buffer[2 + reclen] = '\015';
+ buffer[3 + reclen] = '\0';
+ reclen += 3; /* for the initial escape code and carriage return */
+ SERIAL_WRITE (mips_desc, buffer, reclen);
+#if defined(DOETXACK)
+ finished = pmon_check_ack();
+#endif /* DOETXACK */
+
+ if (!finished)
+ {
+ int binamount;
+ unsigned int zerofill = 0;
+ char *bp = buffer;
+ int i;
+
+ reclen = 0;
+
+ for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) {
+ int binptr = 0;
+
+ binamount = min (BINCHUNK, s->_raw_size - i);
+
+ bfd_get_section_contents (abfd, s, binbuf, i, binamount);
+
+ /* This keeps a rolling checksum, until we decide to output
+ the line: */
+ for (; ((binamount - binptr) > 0);) {
+ pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
+ if (reclen >= (MAXRECSIZE - CHECKSIZE)) {
+ reclen = pmon_checkset (reclen, &bp, &csum);
+ SERIAL_WRITE (mips_desc, buffer, reclen);
+#if defined(DOETXACK)
+ finished = pmon_check_ack();
+ if (finished) {
+ zerofill = 0; /* do not transmit pending zerofills */
+ break;
+ }
+#endif /* DOETXACK */
+
+ if (hashmark) {
+ putchar_unfiltered ('#');
+ gdb_flush (gdb_stdout);
+ }
+
+ bp = buffer;
+ reclen = 0; /* buffer processed */
+ }
+ }
+ }
+
+ /* Ensure no out-standing zerofill requests: */
+ if (zerofill != 0)
+ reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
+
+ /* and then flush the line: */
+ if (reclen > 0) {
+ reclen = pmon_checkset (reclen, &bp, &csum);
+ /* Currently pmon_checkset outputs the line terminator by
+ default, so we write out the buffer so far: */
+ SERIAL_WRITE (mips_desc, buffer, reclen);
+#if defined(DOETXACK)
+ finished = pmon_check_ack();
+#endif /* DOETXACK */
+ }
+ }
+
+ if (hashmark)
+ putchar_unfiltered ('\n');
+ }
+
+ /* Terminate the transfer. We know that we have an empty output
+ buffer at this point. */
+ sprintf (buffer, "/E/E\015"); /* include dummy padding characters */
+ reclen = strlen (buffer);
+ SERIAL_WRITE (mips_desc, buffer, reclen);
+
+ if (finished) { /* Ignore the termination message: */
+ SERIAL_FLUSH_INPUT (mips_desc);
+ } else { /* Deal with termination message: */
+ char hexnumber[9]; /* includes '\0' space */
+ mips_expect ("Entry Address = ");
+ sprintf(hexnumber,"%x",final);
+ mips_expect (hexnumber);
+#if defined(DOETXACK)
+ mips_expect ("\015\012\006\015\012total = 0x");
+#else /* normal termination */
+ mips_expect ("\015\012\015\012total = 0x");
+#endif /* !DOETXACK */
+ sprintf(hexnumber,"%x",bintotal);
+ mips_expect (hexnumber);
+ mips_expect (" bytes\015\012");
+ }
+
+ return;
+}
+
+/* mips_load -- download a file. */
+
+static void
+mips_load (file, from_tty)
+ char *file;
+ int from_tty;
+{
+ /* Get the board out of remote debugging mode. */
+ if (mips_exit_debug ())
+ error ("mips_load: Couldn't get into monitor mode.");
+
+ if (mips_monitor == MON_PMON)
+ pmon_load_fast (file);
+ else
+ mips_load_srec (file);
+
+ mips_initialize ();
+
+/* Finally, make the PC point at the start address */
+
+ if (exec_bfd)
+ write_pc (bfd_get_start_address (exec_bfd));
+
+ inferior_pid = 0; /* No process now */
+
+/* This is necessary because many things were based on the PC at the time that
+ we attached to the monitor, which is no longer valid now that we have loaded
+ new code (and just changed the PC). Another way to do this might be to call
+ normal_stop, except that the stack may not be valid, and things would get
+ horribly confused... */
+
+ clear_symtab_users ();
+}
+\f
/* The target vector. */
struct target_ops mips_ops =
{
"mips", /* to_shortname */
"Remote MIPS debugging over serial line", /* to_longname */
- "Debug a board using the MIPS remote debugging protocol over a serial line.\n\
-Specify the serial device it is connected to (e.g., /dev/ttya).", /* to_doc */
+ "\
+Debug a board using the MIPS remote debugging protocol over a serial line.\n\
+The argument is the device it is connected to or, if it contains a colon,\n\
+HOST:PORT to access a board over a network", /* to_doc */
mips_open, /* to_open */
mips_close, /* to_close */
NULL, /* to_attach */
mips_prepare_to_store, /* to_prepare_to_store */
mips_xfer_memory, /* to_xfer_memory */
mips_files_info, /* to_files_info */
- NULL, /* to_insert_breakpoint */
- NULL, /* to_remove_breakpoint */
+ mips_insert_breakpoint, /* to_insert_breakpoint */
+ mips_remove_breakpoint, /* 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 */
+ mips_kill, /* to_kill */
+ mips_load, /* to_load */
+ NULL, /* to_lookup_symbol */
+ mips_create_inferior, /* to_create_inferior */
+ mips_mourn_inferior, /* to_mourn_inferior */
+ NULL, /* to_can_run */
+ NULL, /* to_notice_signals */
+ 0, /* to_thread_alive */
+ 0, /* to_stop */
+ 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 */
+};
+\f
+/* An alternative target vector: */
+struct target_ops pmon_ops =
+{
+ "pmon", /* to_shortname */
+ "Remote MIPS debugging over serial line", /* to_longname */
+ "\
+Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
+line. The argument is the device it is connected to or, if it contains a\n\
+colon, HOST:PORT to access a board over a network", /* to_doc */
+ pmon_open, /* to_open */
+ mips_close, /* to_close */
+ NULL, /* to_attach */
+ mips_detach, /* to_detach */
+ mips_resume, /* to_resume */
+ pmon_wait, /* to_wait */
+ mips_fetch_registers, /* to_fetch_registers */
+ mips_store_registers, /* to_store_registers */
+ mips_prepare_to_store, /* to_prepare_to_store */
+ mips_xfer_memory, /* to_xfer_memory */
+ mips_files_info, /* to_files_info */
+ mips_insert_breakpoint, /* to_insert_breakpoint */
+ mips_remove_breakpoint, /* 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 */
mips_kill, /* to_kill */
- generic_load, /* to_load */
+ mips_load, /* to_load */
NULL, /* to_lookup_symbol */
mips_create_inferior, /* to_create_inferior */
mips_mourn_inferior, /* to_mourn_inferior */
NULL, /* to_can_run */
NULL, /* to_notice_signals */
+ 0, /* to_thread_alive */
+ 0, /* to_stop */
process_stratum, /* to_stratum */
NULL, /* to_next */
1, /* to_has_all_memory */
_initialize_remote_mips ()
{
add_target (&mips_ops);
+ add_target (&pmon_ops);
add_show_from_set (
add_set_cmd ("timeout", no_class, var_zinteger,
This is the number of seconds to wait for an acknowledgement to a packet\n\
before resending the packet.", &setlist),
&showlist);
+
+ add_show_from_set (
+ add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
+ (char *) &mips_syn_garbage,
+"Set the maximum number of characters to ignore when scanning for a SYN.\n\
+This is the maximum number of characters GDB will ignore when trying to\n\
+synchronize with the remote system. A value of -1 means that there is no limit\n\
+(Note that these characters are printed out even though they are ignored.)",
+ &setlist),
+ &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff