1 /* Remote debugging interface for Array Tech RAID controller..
2 Copyright 90, 91, 92, 93, 94, 1995, 1998 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Rob Savoye for Cygnus.
5 This module talks to a debug monitor called 'MONITOR', which
6 We communicate with MONITOR via either a direct serial line, or a TCP
7 (or possibly TELNET) stream to a terminal multiplexor,
8 which in turn talks to the target board.
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place - Suite 330,
25 Boston, MA 02111-1307, USA.
34 #include <sys/types.h>
35 #include "gdb_string.h"
39 #include "remote-utils.h"
45 #define ARRAY_PROMPT ">> "
47 #define SWAP_TARGET_AND_HOST(buffer,len) \
50 if (TARGET_BYTE_ORDER != HOST_BYTE_ORDER) \
53 char *p = (char *)(buffer); \
54 char *q = ((char *)(buffer)) + len - 1; \
55 for (; p < q; p++, q--) \
65 static void debuglogs (int, char *, ...);
66 static void array_open ();
67 static void array_close ();
68 static void array_detach ();
69 static void array_attach ();
70 static void array_resume ();
71 static void array_fetch_register ();
72 static void array_store_register ();
73 static void array_fetch_registers ();
74 static void array_store_registers ();
75 static void array_prepare_to_store ();
76 static void array_files_info ();
77 static void array_kill ();
78 static void array_create_inferior ();
79 static void array_mourn_inferior ();
80 static void make_gdb_packet ();
81 static int array_xfer_memory ();
82 static int array_wait ();
83 static int array_insert_breakpoint ();
84 static int array_remove_breakpoint ();
87 static int from_hex ();
88 static int array_send_packet ();
89 static int array_get_packet ();
90 static unsigned long ascii2hexword ();
91 static void hexword2ascii ();
93 #define LOG_FILE "monitor.log"
94 #if defined (LOG_FILE)
98 static int timeout
= 30;
99 /* Having this larger than 400 causes us to be incompatible with m68k-stub.c
100 and i386-stub.c. Normally, no one would notice because it only matters
101 for writing large chunks of memory (e.g. in downloads). Also, this needs
102 to be more than 400 if required to hold the registers (see below, where
103 we round it up based on REGISTER_BYTES). */
107 * Descriptor for I/O to remote machine. Initialize it to NULL so that
108 * array_open knows that we don't have a file open when the program starts.
110 serial_t array_desc
= NULL
;
113 * this array of registers need to match the indexes used by GDB. The
114 * whole reason this exists is cause the various ROM monitors use
115 * different strings than GDB does, and doesn't support all the
116 * registers either. So, typing "info reg sp" becomes a "r30".
118 extern char *tmp_mips_processor_type
;
119 extern int mips_set_processor_type ();
121 static struct target_ops array_ops
;
124 init_array_ops (void)
126 array_ops
.to_shortname
= "array";
127 array_ops
.to_longname
=
128 "Debug using the standard GDB remote protocol for the Array Tech target.",
130 "Debug using the standard GDB remote protocol for the Array Tech target.\n\
131 Specify the serial device it is connected to (e.g. /dev/ttya).";
132 array_ops
.to_open
= array_open
;
133 array_ops
.to_close
= array_close
;
134 array_ops
.to_attach
= NULL
;
135 array_ops
.to_post_attach
= NULL
;
136 array_ops
.to_require_attach
= NULL
;
137 array_ops
.to_detach
= array_detach
;
138 array_ops
.to_require_detach
= NULL
;
139 array_ops
.to_resume
= array_resume
;
140 array_ops
.to_wait
= array_wait
;
141 array_ops
.to_post_wait
= NULL
;
142 array_ops
.to_fetch_registers
= array_fetch_registers
;
143 array_ops
.to_store_registers
= array_store_registers
;
144 array_ops
.to_prepare_to_store
= array_prepare_to_store
;
145 array_ops
.to_xfer_memory
= array_xfer_memory
;
146 array_ops
.to_files_info
= array_files_info
;
147 array_ops
.to_insert_breakpoint
= array_insert_breakpoint
;
148 array_ops
.to_remove_breakpoint
= array_remove_breakpoint
;
149 array_ops
.to_terminal_init
= 0;
150 array_ops
.to_terminal_inferior
= 0;
151 array_ops
.to_terminal_ours_for_output
= 0;
152 array_ops
.to_terminal_ours
= 0;
153 array_ops
.to_terminal_info
= 0;
154 array_ops
.to_kill
= array_kill
;
155 array_ops
.to_load
= 0;
156 array_ops
.to_lookup_symbol
= 0;
157 array_ops
.to_create_inferior
= array_create_inferior
;
158 array_ops
.to_post_startup_inferior
= NULL
;
159 array_ops
.to_acknowledge_created_inferior
= NULL
;
160 array_ops
.to_clone_and_follow_inferior
= NULL
;
161 array_ops
.to_post_follow_inferior_by_clone
= NULL
;
162 array_ops
.to_insert_fork_catchpoint
= NULL
;
163 array_ops
.to_remove_fork_catchpoint
= NULL
;
164 array_ops
.to_insert_vfork_catchpoint
= NULL
;
165 array_ops
.to_remove_vfork_catchpoint
= NULL
;
166 array_ops
.to_has_forked
= NULL
;
167 array_ops
.to_has_vforked
= NULL
;
168 array_ops
.to_can_follow_vfork_prior_to_exec
= NULL
;
169 array_ops
.to_post_follow_vfork
= NULL
;
170 array_ops
.to_insert_exec_catchpoint
= NULL
;
171 array_ops
.to_remove_exec_catchpoint
= NULL
;
172 array_ops
.to_has_execd
= NULL
;
173 array_ops
.to_reported_exec_events_per_exec_call
= NULL
;
174 array_ops
.to_has_exited
= NULL
;
175 array_ops
.to_mourn_inferior
= array_mourn_inferior
;
176 array_ops
.to_can_run
= 0;
177 array_ops
.to_notice_signals
= 0;
178 array_ops
.to_thread_alive
= 0;
179 array_ops
.to_stop
= 0;
180 array_ops
.to_pid_to_exec_file
= NULL
;
181 array_ops
.to_core_file_to_sym_file
= NULL
;
182 array_ops
.to_stratum
= process_stratum
;
183 array_ops
.DONT_USE
= 0;
184 array_ops
.to_has_all_memory
= 1;
185 array_ops
.to_has_memory
= 1;
186 array_ops
.to_has_stack
= 1;
187 array_ops
.to_has_registers
= 1;
188 array_ops
.to_has_execution
= 1;
189 array_ops
.to_sections
= 0;
190 array_ops
.to_sections_end
= 0;
191 array_ops
.to_magic
= OPS_MAGIC
;
195 * printf_monitor -- send data to monitor. Works just like printf.
198 printf_monitor (char *pattern
,...)
204 va_start (args
, pattern
);
206 vsprintf (buf
, pattern
, args
);
208 debuglogs (1, "printf_monitor(), Sending: \"%s\".", buf
);
210 if (strlen (buf
) > PBUFSIZ
)
211 error ("printf_monitor(): string too long");
212 if (SERIAL_WRITE (array_desc
, buf
, strlen (buf
)))
213 fprintf (stderr
, "SERIAL_WRITE failed: %s\n", safe_strerror (errno
));
216 * write_monitor -- send raw data to monitor.
219 write_monitor (data
, len
)
223 if (SERIAL_WRITE (array_desc
, data
, len
))
224 fprintf (stderr
, "SERIAL_WRITE failed: %s\n", safe_strerror (errno
));
226 *(data
+ len
+ 1) = '\0';
227 debuglogs (1, "write_monitor(), Sending: \"%s\".", data
);
232 * debuglogs -- deal with debugging info to multiple sources. This takes
233 * two real args, the first one is the level to be compared against
234 * the sr_get_debug() value, the second arg is a printf buffer and args
235 * to be formatted and printed. A CR is added after each string is printed.
238 debuglogs (int level
, char *pattern
,...)
242 unsigned char buf
[PBUFSIZ
];
243 char newbuf
[PBUFSIZ
];
246 va_start (args
, pattern
);
248 if ((level
< 0) || (level
> 100))
250 error ("Bad argument passed to debuglogs(), needs debug level");
254 vsprintf (buf
, pattern
, args
); /* format the string */
256 /* convert some characters so it'll look right in the log */
258 for (i
= 0; buf
[i
] != '\0'; i
++)
261 error ("Debug message too long");
264 case '\n': /* newlines */
268 case '\r': /* carriage returns */
272 case '\033': /* escape */
280 case '\b': /* backspace */
284 default: /* no change */
289 { /* modify control characters */
295 { /* modify control characters */
301 *p
= '\0'; /* terminate the string */
303 if (sr_get_debug () > level
)
304 printf_unfiltered ("%s\n", newbuf
);
306 #ifdef LOG_FILE /* write to the monitor log */
309 fputs (newbuf
, log_file
);
310 fputc ('\n', log_file
);
316 /* readchar -- read a character from the remote system, doing all the fancy
320 readchar (int timeout
)
324 c
= SERIAL_READCHAR (array_desc
, abs (timeout
));
326 if (sr_get_debug () > 5)
329 debuglogs (5, "readchar: timeout = %d\n", timeout
);
334 putc (c
& 0x7f, log_file
);
340 if (c
== SERIAL_TIMEOUT
)
343 return c
; /* Polls shouldn't generate timeout errors */
344 error ("Timeout reading from remote system.");
346 fputs ("ERROR: Timeout reading from remote system", log_file
);
349 perror_with_name ("readchar");
353 * expect -- scan input from the remote system, until STRING is found.
354 * If DISCARD is non-zero, then discard non-matching input, else print
355 * it out. Let the user break out immediately.
358 expect (char *string
, int discard
)
364 debuglogs (1, "Expecting \"%s\".", string
);
369 c
= readchar (timeout
);
377 debuglogs (4, "Matched");
385 fputc_unfiltered (c
, gdb_stdout
);
392 /* Keep discarding input until we see the MONITOR array_cmds->prompt.
394 The convention for dealing with the expect_prompt is that you
396 o *then* wait for the expect_prompt.
398 Thus the last thing that a procedure does with the serial line
399 will be an expect_prompt(). Exception: array_resume does not
400 wait for the expect_prompt, because the terminal is being handed over
401 to the inferior. However, the next thing which happens after that
402 is a array_wait which does wait for the expect_prompt.
403 Note that this includes abnormal exit, e.g. error(). This is
404 necessary to prevent getting into states from which we can't
407 expect_prompt (int discard
)
409 expect (ARRAY_PROMPT
, discard
);
413 * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise
426 if (sr_get_debug () > 5)
427 debuglogs (5, "Ignoring \'%c\'.", ch
);
430 if (sr_get_debug () > 5)
431 debuglogs (5, "Accepting \'%c\'.", ch
);
437 * get_hex_digit -- Get a hex digit from the remote system & return its value.
438 * If ignore is nonzero, ignore spaces, newline & tabs.
441 get_hex_digit (int ignore
)
446 ch
= readchar (timeout
);
449 if (sr_get_debug () > 4)
451 debuglogs (4, "get_hex_digit() got a 0x%x(%c)", ch
, ch
);
455 #ifdef LOG_FILE /* write to the monitor log */
458 fputs ("get_hex_digit() got a 0x", log_file
);
459 fputc (ch
, log_file
);
460 fputc ('\n', log_file
);
466 if (ch
>= '0' && ch
<= '9')
468 else if (ch
>= 'A' && ch
<= 'F')
469 return ch
- 'A' + 10;
470 else if (ch
>= 'a' && ch
<= 'f')
471 return ch
- 'a' + 10;
472 else if (ch
== ' ' && ignore
)
477 debuglogs (4, "Invalid hex digit from remote system. (0x%x)", ch
);
478 error ("Invalid hex digit from remote system. (0x%x)", ch
);
483 /* get_hex_byte -- Get a byte from monitor and put it in *BYT.
484 * Accept any number leading spaces.
487 get_hex_byte (char *byt
)
491 val
= get_hex_digit (1) << 4;
492 debuglogs (4, "get_hex_byte() -- Read first nibble 0x%x", val
);
494 val
|= get_hex_digit (0);
495 debuglogs (4, "get_hex_byte() -- Read second nibble 0x%x", val
);
498 debuglogs (4, "get_hex_byte() -- Read a 0x%x", val
);
502 * get_hex_word -- Get N 32-bit words from remote, each preceded by a space,
503 * and put them in registers starting at REGNO.
514 if (HOST_BYTE_ORDER
== BIG_ENDIAN
)
517 for (i
= 0; i
< 8; i
++)
518 val
= (val
<< 4) + get_hex_digit (i
== 0);
523 for (i
= 7; i
>= 0; i
--)
524 val
= (val
<< 4) + get_hex_digit (i
== 0);
528 debuglogs (4, "get_hex_word() got a 0x%x for a %s host.", val
, (HOST_BYTE_ORDER
== BIG_ENDIAN
) ? "big endian" : "little endian");
533 /* This is called not only when we first attach, but also when the
534 user types "run" after having attached. */
536 array_create_inferior (char *execfile
, char *args
, char **env
)
541 error ("Can't pass arguments to remote MONITOR process");
543 if (execfile
== 0 || exec_bfd
== 0)
544 error ("No executable file specified");
546 entry_pt
= (int) bfd_get_start_address (exec_bfd
);
548 /* The "process" (board) is already stopped awaiting our commands, and
549 the program is already downloaded. We just set its PC and go. */
551 clear_proceed_status ();
553 /* Tell wait_for_inferior that we've started a new process. */
554 init_wait_for_inferior ();
556 /* Set up the "saved terminal modes" of the inferior
557 based on what modes we are starting it with. */
558 target_terminal_init ();
560 /* Install inferior's terminal modes. */
561 target_terminal_inferior ();
563 /* insert_step_breakpoint (); FIXME, do we need this? */
566 proceed ((CORE_ADDR
) entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
570 * array_open -- open a connection to a remote debugger.
571 * NAME is the filename used for communication.
573 static int baudrate
= 9600;
574 static char dev_name
[100];
577 array_open (char *args
, char *name
, int from_tty
)
579 char packet
[PBUFSIZ
];
582 error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\
583 `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name
, name
);
588 target_preopen (from_tty
);
589 unpush_target (&array_ops
);
591 tmp_mips_processor_type
= "lsi33k"; /* change the default from r3051 */
592 mips_set_processor_type_command ("lsi33k", 0);
594 strcpy (dev_name
, args
);
595 array_desc
= SERIAL_OPEN (dev_name
);
597 if (array_desc
== NULL
)
598 perror_with_name (dev_name
);
602 if (SERIAL_SETBAUDRATE (array_desc
, baud_rate
))
604 SERIAL_CLOSE (array_desc
);
605 perror_with_name (name
);
609 SERIAL_RAW (array_desc
);
611 #if defined (LOG_FILE)
612 log_file
= fopen (LOG_FILE
, "w");
613 if (log_file
== NULL
)
614 perror_with_name (LOG_FILE
);
615 fprintf (log_file
, "GDB %s (%s", version
, host_name
);
616 fprintf (log_file
, " --target %s)\n", array_ops
.to_shortname
);
617 fprintf (log_file
, "Remote target %s connected to %s\n\n", array_ops
.to_shortname
, dev_name
);
620 /* see if the target is alive. For a ROM monitor, we can just try to force the
621 expect_prompt to print a few times. For the GDB remote protocol, the application
622 being debugged is sitting at a breakpoint and waiting for GDB to initialize
623 the connection. We force it to give us an empty packet to see if it's alive.
625 debuglogs (3, "Trying to ACK the target's debug stub");
626 /* unless your are on the new hardware, the old board won't initialize
627 because the '@' doesn't flush output like it does on the new ROMS.
629 printf_monitor ("@"); /* ask for the last signal */
630 expect_prompt (1); /* See if we get a expect_prompt */
631 #ifdef TEST_ARRAY /* skip packet for testing */
632 make_gdb_packet (packet
, "?"); /* ask for a bogus packet */
633 if (array_send_packet (packet
) == 0)
634 error ("Couldn't transmit packet\n");
635 printf_monitor ("@\n"); /* force it to flush stdout */
636 expect_prompt (1); /* See if we get a expect_prompt */
638 push_target (&array_ops
);
640 printf ("Remote target %s connected to %s\n", array_ops
.to_shortname
, dev_name
);
644 * array_close -- Close out all files and local state before this
645 * target loses control.
649 array_close (int quitting
)
651 SERIAL_CLOSE (array_desc
);
654 debuglogs (1, "array_close (quitting=%d)", quitting
);
656 #if defined (LOG_FILE)
659 if (ferror (log_file
))
660 printf_filtered ("Error writing log file.\n");
661 if (fclose (log_file
) != 0)
662 printf_filtered ("Error closing log file.\n");
668 * array_detach -- terminate the open connection to the remote
669 * debugger. Use this when you want to detach and do something
670 * else with your gdb.
673 array_detach (int from_tty
)
676 debuglogs (1, "array_detach ()");
678 pop_target (); /* calls array_close to do the real work */
680 printf ("Ending remote %s debugging\n", target_shortname
);
684 * array_attach -- attach GDB to the target.
687 array_attach (char *args
, int from_tty
)
690 printf ("Starting remote %s debugging\n", target_shortname
);
692 debuglogs (1, "array_attach (args=%s)", args
);
694 printf_monitor ("go %x\n");
695 /* swallow the echo. */
696 expect ("go %x\n", 1);
700 * array_resume -- Tell the remote machine to resume.
703 array_resume (int pid
, int step
, enum target_signal sig
)
705 debuglogs (1, "array_resume (step=%d, sig=%d)", step
, sig
);
709 printf_monitor ("s\n");
713 printf_monitor ("go\n");
720 * array_wait -- Wait until the remote machine stops, then return,
721 * storing status in status just as `wait' would.
724 array_wait (int pid
, struct target_waitstatus
*status
)
726 int old_timeout
= timeout
;
730 serial_ttystate ttystate
;
732 debuglogs (1, "array_wait (), printing extraneous text.");
734 status
->kind
= TARGET_WAITKIND_EXITED
;
735 status
->value
.integer
= 0;
737 timeout
= 0; /* Don't time out -- user program is running. */
739 #if !defined(__GO32__) && !defined(__MSDOS__) && !defined(_WIN32)
740 tty_desc
= SERIAL_FDOPEN (0);
741 ttystate
= SERIAL_GET_TTY_STATE (tty_desc
);
742 SERIAL_RAW (tty_desc
);
745 /* poll on the serial port and the keyboard. */
748 c
= readchar (timeout
);
751 if (c
== *(ARRAY_PROMPT
+ i
))
753 if (++i
>= strlen (ARRAY_PROMPT
))
754 { /* matched the prompt */
755 debuglogs (4, "array_wait(), got the expect_prompt.");
760 { /* not the prompt */
763 fputc_unfiltered (c
, gdb_stdout
);
764 gdb_flush (gdb_stdout
);
766 c
= SERIAL_READCHAR (tty_desc
, timeout
);
769 SERIAL_WRITE (array_desc
, &c
, 1);
770 /* do this so it looks like there's keyboard echo */
771 if (c
== 3) /* exit on Control-C */
774 fputc_unfiltered (c
, gdb_stdout
);
775 gdb_flush (gdb_stdout
);
779 SERIAL_SET_TTY_STATE (tty_desc
, ttystate
);
782 debuglogs (4, "array_wait(), got the expect_prompt.");
785 status
->kind
= TARGET_WAITKIND_STOPPED
;
786 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
788 timeout
= old_timeout
;
794 * array_fetch_registers -- read the remote registers into the
798 array_fetch_registers (int ignored
)
802 unsigned char packet
[PBUFSIZ
];
803 char regs
[REGISTER_BYTES
];
805 debuglogs (1, "array_fetch_registers (ignored=%d)\n", ignored
);
807 memset (packet
, 0, PBUFSIZ
);
808 /* Unimplemented registers read as all bits zero. */
809 memset (regs
, 0, REGISTER_BYTES
);
810 make_gdb_packet (packet
, "g");
811 if (array_send_packet (packet
) == 0)
812 error ("Couldn't transmit packet\n");
813 if (array_get_packet (packet
) == 0)
814 error ("Couldn't receive packet\n");
815 /* FIXME: read bytes from packet */
816 debuglogs (4, "array_fetch_registers: Got a \"%s\" back\n", packet
);
817 for (regno
= 0; regno
<= PC_REGNUM
+ 4; regno
++)
819 /* supply register stores in target byte order, so swap here */
820 /* FIXME: convert from ASCII hex to raw bytes */
821 i
= ascii2hexword (packet
+ (regno
* 8));
822 debuglogs (5, "Adding register %d = %x\n", regno
, i
);
823 SWAP_TARGET_AND_HOST (&i
, 4);
824 supply_register (regno
, (char *) &i
);
829 * This is unused by targets like this one that use a
830 * protocol based on GDB's remote protocol.
833 array_fetch_register (int ignored
)
835 array_fetch_registers ();
839 * Get all the registers from the targets. They come back in a large array.
842 array_store_registers (int ignored
)
846 char packet
[PBUFSIZ
];
850 debuglogs (1, "array_store_registers()");
852 memset (packet
, 0, PBUFSIZ
);
853 memset (buf
, 0, PBUFSIZ
);
856 /* Unimplemented registers read as all bits zero. */
857 /* FIXME: read bytes from packet */
858 for (regno
= 0; regno
< 41; regno
++)
860 /* supply register stores in target byte order, so swap here */
861 /* FIXME: convert from ASCII hex to raw bytes */
862 i
= (unsigned long) read_register (regno
);
863 hexword2ascii (num
, i
);
864 strcpy (buf
+ (regno
* 8) + 1, num
);
866 *(buf
+ (regno
* 8) + 2) = 0;
867 make_gdb_packet (packet
, buf
);
868 if (array_send_packet (packet
) == 0)
869 error ("Couldn't transmit packet\n");
870 if (array_get_packet (packet
) == 0)
871 error ("Couldn't receive packet\n");
873 registers_changed ();
877 * This is unused by targets like this one that use a
878 * protocol based on GDB's remote protocol.
881 array_store_register (int ignored
)
883 array_store_registers ();
886 /* Get ready to modify the registers array. On machines which store
887 individual registers, this doesn't need to do anything. On machines
888 which store all the registers in one fell swoop, this makes sure
889 that registers contains all the registers from the program being
893 array_prepare_to_store (void)
895 /* Do nothing, since we can store individual regs */
899 array_files_info (void)
901 printf ("\tAttached to %s at %d baud.\n",
906 * array_write_inferior_memory -- Copy LEN bytes of data from debugger
907 * memory at MYADDR to inferior's memory at MEMADDR. Returns length moved.
910 array_write_inferior_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
914 char packet
[PBUFSIZ
];
919 debuglogs (1, "array_write_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr
, myaddr
, len
);
920 memset (buf
, '\0', PBUFSIZ
); /* this also sets the string terminator */
923 *p
++ = 'M'; /* The command to write memory */
924 hexword2ascii (num
, memaddr
); /* convert the address */
925 strcpy (p
, num
); /* copy the address */
927 *p
++ = ','; /* add comma delimeter */
928 hexword2ascii (num
, len
); /* Get the length as a 4 digit number */
933 *p
++ = ':'; /* add the colon delimeter */
934 for (j
= 0; j
< len
; j
++)
935 { /* copy the data in after converting it */
936 *p
++ = tohex ((myaddr
[j
] >> 4) & 0xf);
937 *p
++ = tohex (myaddr
[j
] & 0xf);
940 make_gdb_packet (packet
, buf
);
941 if (array_send_packet (packet
) == 0)
942 error ("Couldn't transmit packet\n");
943 if (array_get_packet (packet
) == 0)
944 error ("Couldn't receive packet\n");
950 * array_read_inferior_memory -- read LEN bytes from inferior memory
951 * at MEMADDR. Put the result at debugger address MYADDR. Returns
955 array_read_inferior_memory (CORE_ADDR memaddr
, char *myaddr
, int len
)
959 char packet
[PBUFSIZ
];
960 int count
; /* Number of bytes read so far. */
961 unsigned long startaddr
; /* Starting address of this pass. */
962 int len_this_pass
; /* Number of bytes to read in this pass. */
964 debuglogs (1, "array_read_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr
, myaddr
, len
);
966 /* Note that this code works correctly if startaddr is just less
967 than UINT_MAX (well, really CORE_ADDR_MAX if there was such a
968 thing). That is, something like
969 array_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
970 works--it never adds len To memaddr and gets 0. */
971 /* However, something like
972 array_read_bytes (CORE_ADDR_MAX - 3, foo, 4)
973 doesn't need to work. Detect it and give up if there's an attempt
975 if (((memaddr
- 1) + len
) < memaddr
)
981 for (count
= 0, startaddr
= memaddr
; count
< len
; startaddr
+= len_this_pass
)
983 /* Try to align to 16 byte boundry (why?) */
985 if ((startaddr
% 16) != 0)
987 len_this_pass
-= startaddr
% 16;
989 /* Only transfer bytes we need */
990 if (len_this_pass
> (len
- count
))
992 len_this_pass
= (len
- count
);
994 /* Fetch the bytes */
995 debuglogs (3, "read %d bytes from inferior address %x", len_this_pass
,
997 sprintf (buf
, "m%08lx,%04x", startaddr
, len_this_pass
);
998 make_gdb_packet (packet
, buf
);
999 if (array_send_packet (packet
) == 0)
1001 error ("Couldn't transmit packet\n");
1003 if (array_get_packet (packet
) == 0)
1005 error ("Couldn't receive packet\n");
1009 error ("Got no data in the GDB packet\n");
1011 /* Pick packet apart and xfer bytes to myaddr */
1012 debuglogs (4, "array_read_inferior_memory: Got a \"%s\" back\n", packet
);
1013 for (j
= 0; j
< len_this_pass
; j
++)
1015 /* extract the byte values */
1016 myaddr
[count
++] = from_hex (*(packet
+ (j
* 2))) * 16 + from_hex (*(packet
+ (j
* 2) + 1));
1017 debuglogs (5, "myaddr[%d] set to %x\n", count
- 1, myaddr
[count
- 1]);
1023 /* FIXME-someday! merge these two. */
1025 array_xfer_memory (memaddr
, myaddr
, len
, write
, target
)
1030 struct target_ops
*target
; /* ignored */
1033 return array_write_inferior_memory (memaddr
, myaddr
, len
);
1035 return array_read_inferior_memory (memaddr
, myaddr
, len
);
1039 array_kill (char *args
, int from_tty
)
1041 return; /* ignore attempts to kill target system */
1044 /* Clean up when a program exits.
1045 The program actually lives on in the remote processor's RAM, and may be
1046 run again without a download. Don't leave it full of breakpoint
1050 array_mourn_inferior (void)
1052 remove_breakpoints ();
1053 generic_mourn_inferior (); /* Do all the proper things now */
1056 #define MAX_ARRAY_BREAKPOINTS 16
1058 static CORE_ADDR breakaddr
[MAX_ARRAY_BREAKPOINTS
] =
1062 * array_insert_breakpoint -- add a breakpoint
1065 array_insert_breakpoint (CORE_ADDR addr
, char *shadow
)
1069 CORE_ADDR bp_addr
= addr
;
1071 debuglogs (1, "array_insert_breakpoint() addr = 0x%x", addr
);
1072 BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
);
1074 for (i
= 0; i
<= MAX_ARRAY_BREAKPOINTS
; i
++)
1076 if (breakaddr
[i
] == 0)
1078 breakaddr
[i
] = addr
;
1079 if (sr_get_debug () > 4)
1080 printf ("Breakpoint at %s\n", paddr_nz (addr
));
1081 array_read_inferior_memory (bp_addr
, shadow
, bp_size
);
1082 printf_monitor ("b 0x%x\n", addr
);
1088 fprintf (stderr
, "Too many breakpoints (> 16) for monitor\n");
1093 * _remove_breakpoint -- Tell the monitor to remove a breakpoint
1096 array_remove_breakpoint (CORE_ADDR addr
, char *shadow
)
1100 debuglogs (1, "array_remove_breakpoint() addr = 0x%x", addr
);
1102 for (i
= 0; i
< MAX_ARRAY_BREAKPOINTS
; i
++)
1104 if (breakaddr
[i
] == addr
)
1107 /* some monitors remove breakpoints based on the address */
1108 printf_monitor ("bd %x\n", i
);
1113 fprintf (stderr
, "Can't find breakpoint associated with 0x%s\n",
1121 debuglogs (1, "array_stop()");
1122 printf_monitor ("\003");
1127 * array_command -- put a command string, in args, out to MONITOR.
1128 * Output from MONITOR is placed on the users terminal until the
1129 * expect_prompt is seen. FIXME
1132 monitor_command (char *args
, int fromtty
)
1134 debuglogs (1, "monitor_command (args=%s)", args
);
1136 if (array_desc
== NULL
)
1137 error ("monitor target not open.");
1140 error ("Missing command.");
1142 printf_monitor ("%s\n", args
);
1147 * make_gdb_packet -- make a GDB packet. The data is always ASCII.
1148 * A debug packet whose contents are <data>
1149 * is encapsulated for transmission in the form:
1151 * $ <data> # CSUM1 CSUM2
1153 * <data> must be ASCII alphanumeric and cannot include characters
1154 * '$' or '#'. If <data> starts with two characters followed by
1155 * ':', then the existing stubs interpret this as a sequence number.
1157 * CSUM1 and CSUM2 are ascii hex representation of an 8-bit
1158 * checksum of <data>, the most significant nibble is sent first.
1159 * the hex digits 0-9,a-f are used.
1163 make_gdb_packet (char *buf
, char *data
)
1166 unsigned char csum
= 0;
1170 debuglogs (3, "make_gdb_packet(%s)\n", data
);
1171 cnt
= strlen (data
);
1173 error ("make_gdb_packet(): to much data\n");
1175 /* start with the packet header */
1179 /* calculate the checksum */
1180 for (i
= 0; i
< cnt
; i
++)
1186 /* terminate the data with a '#' */
1189 /* add the checksum as two ascii digits */
1190 *p
++ = tohex ((csum
>> 4) & 0xf);
1191 *p
++ = tohex (csum
& 0xf);
1192 *p
= 0x0; /* Null terminator on string */
1196 * array_send_packet -- send a GDB packet to the target with error handling. We
1197 * get a '+' (ACK) back if the packet is received and the checksum
1198 * matches. Otherwise a '-' (NAK) is returned. It returns a 1 for a
1199 * successful transmition, or a 0 for a failure.
1202 array_send_packet (char *packet
)
1210 /* scan the packet to make sure it only contains valid characters.
1211 this may sound silly, but sometimes a garbled packet will hang
1212 the target board. We scan the whole thing, then print the error
1215 for (i
= 0; i
< strlen (packet
); i
++)
1217 debuglogs (5, "array_send_packet(): Scanning \'%c\'\n", packet
[i
]);
1218 /* legit hex numbers or command */
1219 if ((isxdigit (packet
[i
])) || (isalpha (packet
[i
])))
1225 case '#': /* end of packet */
1226 case '$': /* start of packet */
1228 default: /* bogus character */
1230 debuglogs (4, "array_send_packet(): Found a non-ascii digit \'%c\' in the packet.\n", packet
[i
]);
1236 error ("Can't send packet, found %d non-ascii characters", retries
);
1238 /* ok, try to send the packet */
1240 while (retries
++ <= 10)
1242 printf_monitor ("%s", packet
);
1244 /* read until either a timeout occurs (-2) or '+' is read */
1245 while (retries
<= 10)
1247 c
= readchar (-timeout
);
1248 debuglogs (3, "Reading a GDB protocol packet... Got a '%c'\n", c
);
1252 debuglogs (3, "Got Ack\n");
1254 case SERIAL_TIMEOUT
:
1255 debuglogs (3, "Timed out reading serial port\n");
1256 printf_monitor ("@"); /* resync with the monitor */
1257 expect_prompt (1); /* See if we get a expect_prompt */
1258 break; /* Retransmit buffer */
1260 debuglogs (3, "Got NAK\n");
1261 printf_monitor ("@"); /* resync with the monitor */
1262 expect_prompt (1); /* See if we get a expect_prompt */
1265 /* it's probably an old response, or the echo of our command.
1266 * just gobble up the packet and ignore it.
1268 debuglogs (3, "Got a junk packet\n");
1272 c
= readchar (timeout
);
1276 c
= readchar (timeout
);
1278 c
= readchar (timeout
);
1281 debuglogs (3, "Reading a junk packet, got a \"%s\"\n", junk
);
1282 continue; /* Now, go look for next packet */
1287 debuglogs (3, "Retransmitting packet \"%s\"\n", packet
);
1288 break; /* Here to retransmit */
1295 * array_get_packet -- get a GDB packet from the target. Basically we read till we
1296 * see a '#', then check the checksum. It returns a 1 if it's gotten a
1297 * packet, or a 0 it the packet wasn't transmitted correctly.
1300 array_get_packet (char *packet
)
1305 unsigned char pktcsum
;
1311 memset (packet
, 1, PBUFSIZ
);
1313 while (retries
<= 10)
1317 c
= readchar (timeout
);
1318 if (c
== SERIAL_TIMEOUT
)
1320 debuglogs (3, "array_get_packet: got time out from serial port.\n");
1322 debuglogs (3, "Waiting for a '$', got a %c\n", c
);
1327 while (retries
<= 10)
1329 c
= readchar (timeout
);
1330 debuglogs (3, "array_get_packet: got a '%c'\n", c
);
1333 case SERIAL_TIMEOUT
:
1334 debuglogs (3, "Timeout in mid-packet, retrying\n");
1337 debuglogs (3, "Saw new packet start in middle of old one\n");
1338 return 0; /* Start a new packet, count retries */
1341 pktcsum
= from_hex (readchar (timeout
)) << 4;
1342 pktcsum
|= from_hex (readchar (timeout
));
1344 debuglogs (3, "\nGDB packet checksum zero, must be a bogus packet\n");
1345 if (csum
== pktcsum
)
1347 debuglogs (3, "\nGDB packet checksum correct, packet data is \"%s\",\n", packet
);
1348 printf_monitor ("@");
1352 debuglogs (3, "Bad checksum, sentsum=0x%x, csum=0x%x\n", pktcsum
, csum
);
1354 case '*': /* Run length encoding */
1355 debuglogs (5, "Run length encoding in packet\n");
1357 c
= readchar (timeout
);
1359 c
= c
- ' ' + 3; /* Compute repeat count */
1361 if (c
> 0 && c
< 255 && bp
+ c
- 1 < packet
+ PBUFSIZ
- 1)
1363 memset (bp
, *(bp
- 1), c
);
1368 printf_filtered ("Repeat count %d too large for buffer.\n", c
);
1372 if ((!isxdigit (c
)) && (!ispunct (c
)))
1373 debuglogs (4, "Got a non-ascii digit \'%c\'.\\n", c
);
1374 if (bp
< packet
+ PBUFSIZ
- 1)
1382 puts_filtered ("Remote packet too long.\n");
1387 return 0; /* exceeded retries */
1391 * ascii2hexword -- convert an ascii number represented by 8 digits to a hex value.
1393 static unsigned long
1394 ascii2hexword (unsigned char *mem
)
1401 for (i
= 0; i
< 8; i
++)
1404 if (mem
[i
] >= 'A' && mem
[i
] <= 'F')
1405 val
= val
+ mem
[i
] - 'A' + 10;
1406 if (mem
[i
] >= 'a' && mem
[i
] <= 'f')
1407 val
= val
+ mem
[i
] - 'a' + 10;
1408 if (mem
[i
] >= '0' && mem
[i
] <= '9')
1409 val
= val
+ mem
[i
] - '0';
1413 debuglogs (4, "ascii2hexword() got a 0x%x from %s(%x).\n", val
, buf
, mem
);
1418 * ascii2hexword -- convert a hex value to an ascii number represented by 8
1422 hexword2ascii (unsigned char *mem
, unsigned long num
)
1427 debuglogs (4, "hexword2ascii() converting %x ", num
);
1428 for (i
= 7; i
>= 0; i
--)
1430 mem
[i
] = tohex ((num
>> 4) & 0xf);
1431 mem
[i
] = tohex (num
& 0xf);
1435 debuglogs (4, "\tto a %s", mem
);
1438 /* Convert hex digit A to a number. */
1445 debuglogs (4, "from_hex got a 0x%x(%c)\n", a
, a
);
1446 if (a
>= '0' && a
<= '9')
1448 if (a
>= 'a' && a
<= 'f')
1449 return a
- 'a' + 10;
1450 if (a
>= 'A' && a
<= 'F')
1451 return a
- 'A' + 10;
1454 error ("Reply contains invalid hex digit 0x%x", a
);
1458 /* Convert number NIB to a hex digit. */
1465 return 'a' + nib
- 10;
1469 * _initialize_remote_monitors -- setup a few addtitional commands that
1470 * are usually only used by monitors.
1473 _initialize_remote_monitors (void)
1475 /* generic monitor command */
1476 add_com ("monitor", class_obscure
, monitor_command
,
1477 "Send a command to the debug monitor.");
1482 * _initialize_array -- do any special init stuff for the target.
1485 _initialize_array (void)
1488 add_target (&array_ops
);