1 /* Remote debugging interface for Motorola's MVME187BUG monitor, an embedded
4 Copyright 1992, 1993 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by K. Richard Pixley.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "gdb_string.h"
39 #include "remote-utils.h"
44 /* External data declarations */
45 extern int stop_soon_quietly
; /* for wait_for_inferior */
47 /* Forward data declarations */
48 extern struct target_ops bug_ops
; /* Forward declaration */
50 /* Forward function declarations */
51 static int bug_clear_breakpoints
PARAMS ((void));
53 static int bug_read_memory
PARAMS ((CORE_ADDR memaddr
,
54 unsigned char *myaddr
,
57 static int bug_write_memory
PARAMS ((CORE_ADDR memaddr
,
58 unsigned char *myaddr
,
61 /* This variable is somewhat arbitrary. It's here so that it can be
62 set from within a running gdb. */
64 static int srec_max_retries
= 3;
66 /* Each S-record download to the target consists of an S0 header
67 record, some number of S3 data records, and one S7 termination
68 record. I call this download a "frame". Srec_frame says how many
69 bytes will be represented in each frame. */
72 static int srec_frame
= SREC_SIZE
;
74 /* This variable determines how many bytes will be represented in each
77 static int srec_bytes
= 40;
79 /* At one point it appeared to me as though the bug monitor could not
80 really be expected to receive two sequential characters at 9600
81 baud reliably. Echo-pacing is an attempt to force data across the
82 line even in this condition. Specifically, in echo-pace mode, each
83 character is sent one at a time and we look for the echo before
84 sending the next. This is excruciatingly slow. */
86 static int srec_echo_pace
= 0;
88 /* How long to wait after an srec for a possible error message.
89 Similar to the above, I tried sleeping after sending each S3 record
90 in hopes that I might actually see error messages from the bug
91 monitor. This might actually work if we were to use sleep
92 intervals smaller than 1 second. */
94 static int srec_sleep
= 0;
96 /* Every srec_noise records, flub the checksum. This is a debugging
97 feature. Set the variable to something other than 1 in order to
98 inject *deliberate* checksum errors. One might do this if one
99 wanted to test error handling and recovery. */
101 static int srec_noise
= 0;
103 /* Called when SIGALRM signal sent due to alarm() timeout. */
105 /* Number of SIGTRAPs we need to simulate. That is, the next
106 NEED_ARTIFICIAL_TRAP calls to bug_wait should just return
107 SIGTRAP without actually waiting for anything. */
109 static int need_artificial_trap
= 0;
112 * Download a file specified in 'args', to the bug.
116 bug_load (args
, fromtty
)
126 dcache_flush (gr_get_dcache ());
128 abfd
= bfd_openr (args
, 0);
131 printf_filtered ("Unable to open file %s\n", args
);
135 if (bfd_check_format (abfd
, bfd_object
) == 0)
137 printf_filtered ("File is not an object file\n");
142 while (s
!= (asection
*) NULL
)
144 srec_frame
= SREC_SIZE
;
145 if (s
->flags
& SEC_LOAD
)
149 char *buffer
= xmalloc (srec_frame
);
151 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
, s
->vma
+ s
->_raw_size
);
152 gdb_flush (gdb_stdout
);
153 for (i
= 0; i
< s
->_raw_size
; i
+= srec_frame
)
155 if (srec_frame
> s
->_raw_size
- i
)
156 srec_frame
= s
->_raw_size
- i
;
158 bfd_get_section_contents (abfd
, s
, buffer
, i
, srec_frame
);
159 bug_write_memory (s
->vma
+ i
, buffer
, srec_frame
);
160 printf_filtered ("*");
161 gdb_flush (gdb_stdout
);
163 printf_filtered ("\n");
168 sprintf (buffer
, "rs ip %lx", (unsigned long) abfd
->start_address
);
169 sr_write_cr (buffer
);
190 while (*s
&& !isspace (*s
))
196 copy
= xmalloc (len
+ 1);
197 memcpy (copy
, word
, len
);
204 static struct gr_settings bug_settings
=
209 bug_clear_breakpoints
, /* clear_all_breakpoints */
210 bug_read_memory
, /* readfunc */
211 bug_write_memory
, /* writefunc */
212 gr_generic_checkin
, /* checkin */
215 static char *cpu_check_strings
[] =
222 bug_open (args
, from_tty
)
229 gr_open (args
, from_tty
, &bug_settings
);
230 /* decide *now* whether we are on an 88100 or an 88110 */
231 sr_write_cr ("rs cr06");
232 sr_expect ("rs cr06");
234 switch (gr_multi_scan (cpu_check_strings
, 0))
236 case 0: /* this is an m88100 */
237 target_is_m88110
= 0;
239 case 1: /* this is an m88110 */
240 target_is_m88110
= 1;
247 /* Tell the remote machine to resume. */
250 bug_resume (pid
, step
, sig
)
252 enum target_signal sig
;
254 dcache_flush (gr_get_dcache ());
260 /* Force the next bug_wait to return a trap. Not doing anything
261 about I/O from the target means that the user has to type
262 "continue" to see any. FIXME, this should be fixed. */
263 need_artificial_trap
= 1;
271 /* Wait until the remote machine stops, then return,
272 storing status in STATUS just as `wait' would. */
274 static char *wait_strings
[] =
277 "Exception: Data Access Fault (Local Bus Timeout)",
278 "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */
284 bug_wait (pid
, status
)
286 struct target_waitstatus
*status
;
288 int old_timeout
= sr_get_timeout ();
289 int old_immediate_quit
= immediate_quit
;
291 status
->kind
= TARGET_WAITKIND_EXITED
;
292 status
->value
.integer
= 0;
294 /* read off leftovers from resume so that the rest can be passed
295 back out as stdout. */
296 if (need_artificial_trap
== 0)
298 sr_expect ("Effective address: ");
299 (void) sr_get_hex_word ();
303 sr_set_timeout (-1); /* Don't time out -- user program is running. */
304 immediate_quit
= 1; /* Helps ability to QUIT */
306 switch (gr_multi_scan (wait_strings
, need_artificial_trap
== 0))
308 case 0: /* breakpoint case */
309 status
->kind
= TARGET_WAITKIND_STOPPED
;
310 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
311 /* user output from the target can be discarded here. (?) */
315 case 1: /* bus error */
316 status
->kind
= TARGET_WAITKIND_STOPPED
;
317 status
->value
.sig
= TARGET_SIGNAL_BUS
;
318 /* user output from the target can be discarded here. (?) */
322 case 2: /* normal case */
324 if (need_artificial_trap
!= 0)
327 status
->kind
= TARGET_WAITKIND_STOPPED
;
328 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
329 need_artificial_trap
--;
335 status
->kind
= TARGET_WAITKIND_EXITED
;
336 status
->value
.integer
= 0;
340 case -1: /* trouble */
342 fprintf_filtered (gdb_stderr
,
343 "Trouble reading target during wait\n");
347 sr_set_timeout (old_timeout
);
348 immediate_quit
= old_immediate_quit
;
352 /* Return the name of register number REGNO
353 in the form input and output by bug.
355 Returns a pointer to a static buffer containing the answer. */
362 "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07",
363 "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15",
364 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
365 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
367 /* these get confusing because we omit a few and switch some ordering around. */
369 "cr01", /* 32 = psr */
370 "fcr62", /* 33 = fpsr */
371 "fcr63", /* 34 = fpcr */
372 "ip", /* this is something of a cheat. */
374 "cr05", /* 36 = snip */
375 "cr06", /* 37 = sfip */
377 "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07",
378 "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15",
379 "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
380 "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31",
386 #if 0 /* not currently used */
387 /* Read from remote while the input matches STRING. Return zero on
388 success, -1 on failure. */
402 printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c
, c
, --s
);
412 bug_srec_write_cr (s
)
420 if (sr_get_debug () > 0)
424 SERIAL_WRITE (sr_get_desc (), p
, 1);
425 while (sr_pollchar () != *p
);
430 /* return(bug_scan (s) || bug_scan ("\n")); */
436 /* Store register REGNO, or all if REGNO == -1. */
439 bug_fetch_register (regno
)
448 for (i
= 0; i
< NUM_REGS
; ++i
)
449 bug_fetch_register (i
);
451 else if (target_is_m88110
&& regno
== SFIP_REGNUM
)
453 /* m88110 has no sfip. */
455 supply_register (regno
, (char *) &l
);
457 else if (regno
< XFP_REGNUM
)
459 char buffer
[MAX_REGISTER_RAW_SIZE
];
462 sr_write_cr (get_reg_name (regno
));
464 store_unsigned_integer (buffer
, REGISTER_RAW_SIZE (regno
),
467 supply_register (regno
, buffer
);
471 /* Float register so we need to parse a strange data format. */
473 unsigned char fpreg_buf
[10];
476 sr_write (get_reg_name (regno
), strlen (get_reg_name (regno
)));
479 sr_expect (get_reg_name (regno
));
484 p
= sr_get_hex_digit (1);
485 fpreg_buf
[0] = p
<< 7;
489 p
= sr_get_hex_digit (1);
490 fpreg_buf
[0] += (p
<< 4);
491 fpreg_buf
[0] += sr_get_hex_digit (1);
493 fpreg_buf
[1] = sr_get_hex_digit (1) << 4;
497 fpreg_buf
[1] += sr_get_hex_digit (1);
499 fpreg_buf
[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
500 fpreg_buf
[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
501 fpreg_buf
[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
502 fpreg_buf
[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
503 fpreg_buf
[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
504 fpreg_buf
[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
509 supply_register (regno
, fpreg_buf
);
515 /* Store register REGNO, or all if REGNO == -1. */
518 bug_store_register (regno
)
528 for (i
= 0; i
< NUM_REGS
; ++i
)
529 bug_store_register (i
);
535 regname
= get_reg_name (regno
);
537 if (target_is_m88110
&& regno
== SFIP_REGNUM
)
539 else if (regno
< XFP_REGNUM
)
540 sprintf (buffer
, "rs %s %08x",
542 read_register (regno
));
545 unsigned char *fpreg_buf
=
546 (unsigned char *) ®isters
[REGISTER_BYTE (regno
)];
548 sprintf (buffer
, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d",
551 (fpreg_buf
[0] >> 7) & 0xf,
554 (fpreg_buf
[1] >> 8) & 0xf,
565 sr_write_cr (buffer
);
573 bug_xfer_memory (memaddr
, myaddr
, len
, write
, target
)
578 struct target_ops
*target
; /* ignored */
582 /* Round starting address down to longword boundary. */
583 register CORE_ADDR addr
;
585 /* Round ending address up; get number of longwords that makes. */
588 /* Allocate buffer of that many longwords. */
589 register int *buffer
;
591 addr
= memaddr
& -sizeof (int);
592 count
= (((memaddr
+ len
) - addr
) + sizeof (int) - 1) / sizeof (int);
594 buffer
= (int *) alloca (count
* sizeof (int));
598 /* Fill start and end extra bytes of buffer with existing memory data. */
600 if (addr
!= memaddr
|| len
< (int) sizeof (int))
602 /* Need part of initial word -- fetch it. */
603 buffer
[0] = gr_fetch_word (addr
);
606 if (count
> 1) /* FIXME, avoid if even boundary */
609 = gr_fetch_word (addr
+ (count
- 1) * sizeof (int));
612 /* Copy data to be written over corresponding part of buffer */
614 memcpy ((char *) buffer
+ (memaddr
& (sizeof (int) - 1)), myaddr
, len
);
616 /* Write the entire buffer. */
618 for (i
= 0; i
< count
; i
++, addr
+= sizeof (int))
621 gr_store_word (addr
, buffer
[i
]);
632 /* Read all the longwords */
633 for (i
= 0; i
< count
; i
++, addr
+= sizeof (int))
636 buffer
[i
] = gr_fetch_word (addr
);
644 /* Copy appropriate bytes out of the buffer. */
645 memcpy (myaddr
, (char *) buffer
+ (memaddr
& (sizeof (int) - 1)), len
);
656 command
= (srec_echo_pace
? "lo 0 ;x" : "lo 0");
658 sr_write_cr (command
);
661 bug_srec_write_cr ("S0030000FC");
665 /* This is an extremely vulnerable and fragile function. I've made
666 considerable attempts to make this deterministic, but I've
667 certainly forgotten something. The trouble is that S-records are
668 only a partial file format, not a protocol. Worse, apparently the
669 m88k bug monitor does not run in real time while receiving
670 S-records. Hence, we must pay excruciating attention to when and
671 where error messages are returned, and what has actually been sent.
673 Each call represents a chunk of memory to be sent to the target.
674 We break that chunk into an S0 header record, some number of S3
675 data records each containing srec_bytes, and an S7 termination
678 static char *srecord_strings
[] =
686 bug_write_memory (memaddr
, myaddr
, len
)
688 unsigned char *myaddr
;
695 char *buffer
= alloca ((srec_bytes
+ 8) << 1);
703 if (retries
> srec_max_retries
)
708 if (sr_get_debug () > 0)
709 printf ("\n<retrying...>\n");
711 /* This gr_expect_prompt call is extremely important. Without
712 it, we will tend to resend our packet so fast that it
713 will arrive before the bug monitor is ready to receive
714 it. This would lead to a very ugly resend loop. */
730 if (thisgo
> srec_bytes
)
733 address
= memaddr
+ done
;
734 sprintf (buf
, "S3%02X%08X", thisgo
+ 4 + 1, address
);
737 checksum
+= (thisgo
+ 4 + 1
739 + ((address
>> 8) & 0xff)
740 + ((address
>> 16) & 0xff)
741 + ((address
>> 24) & 0xff));
743 for (idx
= 0; idx
< thisgo
; idx
++)
745 sprintf (buf
, "%02X", myaddr
[idx
+ done
]);
746 checksum
+= myaddr
[idx
+ done
];
752 /* FIXME-NOW: insert a deliberate error every now and then.
753 This is intended for testing/debugging the error handling
755 static int counter
= 0;
756 if (++counter
> srec_noise
)
763 sprintf (buf
, "%02X", ~checksum
& 0xff);
764 bug_srec_write_cr (buffer
);
769 /* This pollchar is probably redundant to the gr_multi_scan
770 below. Trouble is, we can't be sure when or where an
771 error message will appear. Apparently, when running at
772 full speed from a typical sun4, error messages tend to
773 appear to arrive only *after* the s7 record. */
775 if ((x
= sr_pollchar ()) != 0)
777 if (sr_get_debug () > 0)
778 printf ("\n<retrying...>\n");
782 /* flush any remaining input and verify that we are back
783 at the prompt level. */
785 /* start all over again. */
794 bug_srec_write_cr ("S7060000000000F9");
797 /* Having finished the load, we need to figure out whether we
800 while (gr_multi_scan (srecord_strings
, 0) == 0);;
805 /* Copy LEN bytes of data from debugger memory at MYADDR
806 to inferior's memory at MEMADDR. Returns errno value.
807 * sb/sh instructions don't work on unaligned addresses, when TU=1.
810 /* Read LEN bytes from inferior memory at MEMADDR. Put the result
811 at debugger address MYADDR. Returns errno value. */
813 bug_read_memory (memaddr
, myaddr
, len
)
815 unsigned char *myaddr
;
825 unsigned int checksum
;
827 sprintf (request
, "du 0 %x:&%d", memaddr
, len
);
828 sr_write_cr (request
);
830 p
= buffer
= alloca (len
);
832 /* scan up through the header */
833 sr_expect ("S0030000FC");
835 while (p
< buffer
+ len
)
837 /* scan off any white space. */
838 while (sr_readchar () != 'S');;
840 /* what kind of s-rec? */
841 type
= sr_readchar ();
843 /* scan record size */
844 sr_get_hex_byte (&size
);
857 sr_get_hex_byte (&c
);
858 inaddr
= (inaddr
<< 8) + c
;
861 /* intentional fall through */
863 sr_get_hex_byte (&c
);
864 inaddr
= (inaddr
<< 8) + c
;
867 /* intentional fall through */
869 sr_get_hex_byte (&c
);
870 inaddr
= (inaddr
<< 8) + c
;
873 sr_get_hex_byte (&c
);
874 inaddr
= (inaddr
<< 8) + c
;
881 error ("reading s-records.");
885 || (memaddr
+ len
) < (inaddr
+ size
))
886 error ("srec out of memory range.");
888 if (p
!= buffer
+ inaddr
- memaddr
)
889 error ("srec out of sequence.");
891 for (; size
; --size
, ++p
)
897 sr_get_hex_byte (&c
);
898 if (c
!= (~checksum
& 0xff))
899 error ("bad s-rec checksum");
904 if (p
!= buffer
+ len
)
907 memcpy (myaddr
, buffer
, len
);
911 #define MAX_BREAKS 16
912 static int num_brkpts
= 0;
914 bug_insert_breakpoint (addr
, save
)
916 char *save
; /* Throw away, let bug save instructions */
920 if (num_brkpts
< MAX_BREAKS
)
925 sprintf (buffer
, "br %x", addr
);
926 sr_write_cr (buffer
);
932 fprintf_filtered (gdb_stderr
,
933 "Too many break points, break point not installed\n");
939 bug_remove_breakpoint (addr
, save
)
941 char *save
; /* Throw away, let bug save instructions */
948 sprintf (buffer
, "nobr %x", addr
);
949 sr_write_cr (buffer
);
956 /* Clear the bugs notion of what the break points are */
958 bug_clear_breakpoints ()
963 sr_write_cr ("nobr");
971 struct target_ops bug_ops
;
976 bug_ops
.to_shortname
= "bug";
977 "Remote BUG monitor",
978 bug_ops
.to_longname
= "Use the mvme187 board running the BUG monitor connected by a serial line.";
979 bug_ops
.to_doc
= " ";
980 bug_ops
.to_open
= bug_open
;
981 bug_ops
.to_close
= gr_close
;
982 bug_ops
.to_attach
= 0;
983 bug_ops
.to_post_attach
= NULL
;
984 bug_ops
.to_require_attach
= NULL
;
985 bug_ops
.to_detach
= gr_detach
;
986 bug_ops
.to_require_detach
= NULL
;
987 bug_ops
.to_resume
= bug_resume
;
988 bug_ops
.to_wait
= bug_wait
;
989 bug_ops
.to_post_wait
= NULL
;
990 bug_ops
.to_fetch_registers
= bug_fetch_register
;
991 bug_ops
.to_store_registers
= bug_store_register
;
992 bug_ops
.to_prepare_to_store
= gr_prepare_to_store
;
993 bug_ops
.to_xfer_memory
= bug_xfer_memory
;
994 bug_ops
.to_files_info
= gr_files_info
;
995 bug_ops
.to_insert_breakpoint
= bug_insert_breakpoint
;
996 bug_ops
.to_remove_breakpoint
= bug_remove_breakpoint
;
997 bug_ops
.to_terminal_init
= 0;
998 bug_ops
.to_terminal_inferior
= 0;
999 bug_ops
.to_terminal_ours_for_output
= 0;
1000 bug_ops
.to_terminal_ours
= 0;
1001 bug_ops
.to_terminal_info
= 0;
1002 bug_ops
.to_kill
= gr_kill
;
1003 bug_ops
.to_load
= bug_load
;
1004 bug_ops
.to_lookup_symbol
= 0;
1005 bug_ops
.to_create_inferior
= gr_create_inferior
;
1006 bug_ops
.to_post_startup_inferior
= NULL
;
1007 bug_ops
.to_acknowledge_created_inferior
= NULL
;
1008 bug_ops
.to_clone_and_follow_inferior
= NULL
;
1009 bug_ops
.to_post_follow_inferior_by_clone
= NULL
;
1010 bug_ops
.to_insert_fork_catchpoint
= NULL
;
1011 bug_ops
.to_remove_fork_catchpoint
= NULL
;
1012 bug_ops
.to_insert_vfork_catchpoint
= NULL
;
1013 bug_ops
.to_remove_vfork_catchpoint
= NULL
;
1014 bug_ops
.to_has_forked
= NULL
;
1015 bug_ops
.to_has_vforked
= NULL
;
1016 bug_ops
.to_can_follow_vfork_prior_to_exec
= NULL
;
1017 bug_ops
.to_post_follow_vfork
= NULL
;
1018 bug_ops
.to_insert_exec_catchpoint
= NULL
;
1019 bug_ops
.to_remove_exec_catchpoint
= NULL
;
1020 bug_ops
.to_has_execd
= NULL
;
1021 bug_ops
.to_reported_exec_events_per_exec_call
= NULL
;
1022 bug_ops
.to_has_exited
= NULL
;
1023 bug_ops
.to_mourn_inferior
= gr_mourn
;
1024 bug_ops
.to_can_run
= 0;
1025 bug_ops
.to_notice_signals
= 0;
1026 bug_ops
.to_thread_alive
= 0;
1027 bug_ops
.to_stop
= 0;
1028 bug_ops
.to_pid_to_exec_file
= NULL
;
1029 bug_ops
.to_core_file_to_sym_file
= NULL
;
1030 bug_ops
.to_stratum
= process_stratum
;
1031 bug_ops
.DONT_USE
= 0;
1032 bug_ops
.to_has_all_memory
= 1;
1033 bug_ops
.to_has_memory
= 1;
1034 bug_ops
.to_has_stack
= 1;
1035 bug_ops
.to_has_registers
= 0;
1036 bug_ops
.to_has_execution
= 0;
1037 bug_ops
.to_sections
= 0;
1038 bug_ops
.to_sections_end
= 0;
1039 bug_ops
.to_magic
= OPS_MAGIC
; /* Always the last thing */
1040 } /* init_bug_ops */
1043 _initialize_remote_bug ()
1046 add_target (&bug_ops
);
1049 (add_set_cmd ("srec-bytes", class_support
, var_uinteger
,
1050 (char *) &srec_bytes
,
1052 Set the number of bytes represented in each S-record.\n\
1053 This affects the communication protocol with the remote target.",
1058 (add_set_cmd ("srec-max-retries", class_support
, var_uinteger
,
1059 (char *) &srec_max_retries
,
1061 Set the number of retries for shipping S-records.\n\
1062 This affects the communication protocol with the remote target.",
1067 /* This needs to set SREC_SIZE, not srec_frame which gets changed at the
1068 end of a download. But do we need the option at all? */
1070 (add_set_cmd ("srec-frame", class_support
, var_uinteger
,
1071 (char *) &srec_frame
,
1073 Set the number of bytes in an S-record frame.\n\
1074 This affects the communication protocol with the remote target.",
1080 (add_set_cmd ("srec-noise", class_support
, var_zinteger
,
1081 (char *) &srec_noise
,
1083 Set number of S-record to send before deliberately flubbing a checksum.\n\
1084 Zero means flub none at all. This affects the communication protocol\n\
1085 with the remote target.",
1090 (add_set_cmd ("srec-sleep", class_support
, var_zinteger
,
1091 (char *) &srec_sleep
,
1093 Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\
1094 This affects the communication protocol with the remote target.",
1099 (add_set_cmd ("srec-echo-pace", class_support
, var_boolean
,
1100 (char *) &srec_echo_pace
,
1102 Set echo-verification.\n\
1103 When on, use verification by echo when downloading S-records. This is\n\
1104 much slower, but generally more reliable.",