1 /* S-record download support for GDB, the GNU debugger.
2 Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
26 extern void report_transfer_performance (unsigned long, time_t, time_t);
28 extern int remote_debug
;
30 static int make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
* abfd
,
31 asection
* sect
, int sectoff
, int *maxrecsize
,
34 /* Download an executable by converting it to S records. DESC is a
35 serial_t to send the data to. FILE is the name of the file to be
36 loaded. LOAD_OFFSET is the offset into memory to load data into.
37 It is usually specified by the user and is useful with the a.out
38 file format. MAXRECSIZE is the length in chars of the largest
39 S-record the host can accomodate. This is measured from the
40 starting `S' to the last char of the checksum. FLAGS is various
41 random flags, and HASHMARK is non-zero to cause a `#' to be
42 printed out for each record loaded. WAITACK, if non-NULL, is a
43 function that waits for an acknowledgement after each S-record,
44 and returns non-zero if the ack is read correctly. */
47 load_srec (desc
, file
, load_offset
, maxrecsize
, flags
, hashmark
, waitack
)
54 int (*waitack
) PARAMS ((void));
61 time_t start_time
, end_time
;
62 unsigned long data_count
= 0;
64 srec
= (char *) alloca (maxrecsize
+ 1);
66 abfd
= bfd_openr (file
, 0);
69 printf_filtered ("Unable to open file %s\n", file
);
73 if (bfd_check_format (abfd
, bfd_object
) == 0)
75 printf_filtered ("File is not an object file\n");
79 start_time
= time (NULL
);
81 /* Write a type 0 header record. no data for a type 0, and there
82 is no data, so len is 0. */
85 make_srec (srec
, 0, NULL
, (asection
*) 1, 0, &reclen
, flags
);
89 puts_debug ("sent -->", srec
, "<--");
91 SERIAL_WRITE (desc
, srec
, reclen
);
93 for (s
= abfd
->sections
; s
; s
= s
->next
)
94 if (s
->flags
& SEC_LOAD
)
97 bfd_vma addr
= bfd_get_section_vma (abfd
, s
) + load_offset
;
98 bfd_size_type size
= bfd_get_section_size_before_reloc (s
);
99 char *section_name
= (char *) bfd_get_section_name (abfd
, s
);
100 /* Both GDB and BFD have mechanisms for printing addresses.
101 In the below, GDB's is used so that the address is
102 consistent with the rest of GDB. BFD's printf_vma() could
103 have also been used. cagney 1999-09-01 */
104 printf_filtered ("%s\t: 0x%s .. 0x%s ",
107 paddr (addr
+ size
));
108 gdb_flush (gdb_stdout
);
112 for (i
= 0; i
< size
; i
+= numbytes
)
115 numbytes
= make_srec (srec
, (CORE_ADDR
) (addr
+ i
), abfd
, s
,
121 puts_debug ("sent -->", srec
, "<--");
124 /* Repeatedly send the S-record until a good
125 acknowledgement is sent back. */
128 SERIAL_WRITE (desc
, srec
, reclen
);
129 if (ui_load_progress_hook
)
130 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
131 error ("Canceled the download");
133 while (waitack
!= NULL
&& !waitack ());
137 putchar_unfiltered ('#');
138 gdb_flush (gdb_stdout
);
140 } /* Per-packet (or S-record) loop */
142 if (ui_load_progress_hook
)
143 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
144 error ("Canceled the download");
145 putchar_unfiltered ('\n');
149 putchar_unfiltered ('\n');
151 end_time
= time (NULL
);
153 /* Write a terminator record. */
156 make_srec (srec
, abfd
->start_address
, NULL
, NULL
, 0, &reclen
, flags
);
161 puts_debug ("sent -->", srec
, "<--");
164 SERIAL_WRITE (desc
, srec
, reclen
);
166 /* Some monitors need these to wake up properly. (Which ones? -sts) */
167 SERIAL_WRITE (desc
, "\r\r", 2);
169 puts_debug ("sent -->", "\r\r", "<---");
171 SERIAL_FLUSH_INPUT (desc
);
173 report_transfer_performance (data_count
, start_time
, end_time
);
177 * make_srec -- make an srecord. This writes each line, one at a
178 * time, each with it's own header and trailer line.
179 * An srecord looks like this:
181 * byte count-+ address
182 * start ---+ | | data +- checksum
184 * S01000006F6B692D746573742E73726563E4
185 * S315000448600000000000000000FC00005900000000E9
186 * S31A0004000023C1400037DE00F023604000377B009020825000348D
187 * S30B0004485A0000000000004E
190 * S<type><length><address><data><checksum>
194 * is the number of bytes following upto the checksum. Note that
195 * this is not the number of chars following, since it takes two
196 * chars to represent a byte.
200 * 1) two byte address data record
201 * 2) three byte address data record
202 * 3) four byte address data record
203 * 7) four byte address termination record
204 * 8) three byte address termination record
205 * 9) two byte address termination record
208 * is the start address of the data following, or in the case of
209 * a termination record, the start address of the image
213 * is the sum of all the raw byte data in the record, from the length
214 * upwards, modulo 256 and subtracted from 255.
216 * This routine returns the length of the S-record.
221 make_srec (srec
, targ_addr
, abfd
, sect
, sectoff
, maxrecsize
, flags
)
230 unsigned char checksum
;
232 const static char hextab
[] = "0123456789ABCDEF";
233 const static char data_code_table
[] = "123";
234 const static char term_code_table
[] = "987";
235 const static char header_code_table
[] = "000";
236 const static char *formats
[] =
240 char const *code_table
;
248 tmp
= flags
; /* Data or header record */
249 code_table
= abfd
? data_code_table
: header_code_table
;
250 binbuf
= alloca (*maxrecsize
/ 2);
254 tmp
= flags
>> SREC_TERM_SHIFT
; /* Term record */
255 code_table
= term_code_table
;
258 if ((tmp
& SREC_2_BYTE_ADDR
) && (targ_addr
<= 0xffff))
260 else if ((tmp
& SREC_3_BYTE_ADDR
) && (targ_addr
<= 0xffffff))
262 else if (tmp
& SREC_4_BYTE_ADDR
)
265 internal_error ("make_srec: Bad address (0x%x), or bad flags (0x%x).",
268 /* Now that we know the address size, we can figure out how much
269 data this record can hold. */
273 payload_size
= (*maxrecsize
- (1 + 1 + 2 + addr_size
* 2 + 2)) / 2;
274 payload_size
= min (payload_size
, sect
->_raw_size
- sectoff
);
276 bfd_get_section_contents (abfd
, sect
, binbuf
, sectoff
, payload_size
);
279 payload_size
= 0; /* Term or header packets have no payload */
281 /* Output the header. */
283 sprintf (srec
, formats
[addr_size
- 2], code_table
[addr_size
- 2],
284 addr_size
+ payload_size
+ 1, (int) targ_addr
);
286 /* Note that the checksum is calculated on the raw data, not the
287 hexified data. It includes the length, address and the data
288 portions of the packet. */
292 checksum
+= (payload_size
+ addr_size
+ 1 /* Packet length */
293 + (targ_addr
& 0xff) /* Address... */
294 + ((targ_addr
>> 8) & 0xff)
295 + ((targ_addr
>> 16) & 0xff)
296 + ((targ_addr
>> 24) & 0xff));
298 p
= srec
+ 1 + 1 + 2 + addr_size
* 2;
300 /* Build the Srecord. */
301 for (tmp
= 0; tmp
< payload_size
; tmp
++)
306 *p
++ = hextab
[k
>> 4];
307 *p
++ = hextab
[k
& 0xf];
311 checksum
= ~checksum
;
313 *p
++ = hextab
[checksum
>> 4];
314 *p
++ = hextab
[checksum
& 0xf];
317 *maxrecsize
= p
- srec
;
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