1 /* S-record download support for GDB, the GNU debugger.
2 Copyright 1995, 1996, 1997, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 extern void report_transfer_performance (unsigned long, time_t, time_t);
29 extern int remote_debug
;
31 static int make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
* abfd
,
32 asection
* sect
, int sectoff
, int *maxrecsize
,
35 /* Download an executable by converting it to S records. DESC is a
36 serial_t to send the data to. FILE is the name of the file to be
37 loaded. LOAD_OFFSET is the offset into memory to load data into.
38 It is usually specified by the user and is useful with the a.out
39 file format. MAXRECSIZE is the length in chars of the largest
40 S-record the host can accomodate. This is measured from the
41 starting `S' to the last char of the checksum. FLAGS is various
42 random flags, and HASHMARK is non-zero to cause a `#' to be
43 printed out for each record loaded. WAITACK, if non-NULL, is a
44 function that waits for an acknowledgement after each S-record,
45 and returns non-zero if the ack is read correctly. */
48 load_srec (serial_t desc
, const char *file
, bfd_vma load_offset
, int maxrecsize
,
49 int flags
, int hashmark
, int (*waitack
) (void))
56 time_t start_time
, end_time
;
57 unsigned long data_count
= 0;
59 srec
= (char *) alloca (maxrecsize
+ 1);
61 abfd
= bfd_openr (file
, 0);
64 printf_filtered ("Unable to open file %s\n", file
);
68 if (bfd_check_format (abfd
, bfd_object
) == 0)
70 printf_filtered ("File is not an object file\n");
74 start_time
= time (NULL
);
76 /* Write a type 0 header record. no data for a type 0, and there
77 is no data, so len is 0. */
80 make_srec (srec
, 0, NULL
, (asection
*) 1, 0, &reclen
, flags
);
84 puts_debug ("sent -->", srec
, "<--");
86 SERIAL_WRITE (desc
, srec
, reclen
);
88 for (s
= abfd
->sections
; s
; s
= s
->next
)
89 if (s
->flags
& SEC_LOAD
)
92 bfd_vma addr
= bfd_get_section_vma (abfd
, s
) + load_offset
;
93 bfd_size_type size
= bfd_get_section_size_before_reloc (s
);
94 char *section_name
= (char *) bfd_get_section_name (abfd
, s
);
95 /* Both GDB and BFD have mechanisms for printing addresses.
96 In the below, GDB's is used so that the address is
97 consistent with the rest of GDB. BFD's printf_vma() could
98 have also been used. cagney 1999-09-01 */
99 printf_filtered ("%s\t: 0x%s .. 0x%s ",
102 paddr (addr
+ size
));
103 gdb_flush (gdb_stdout
);
107 for (i
= 0; i
< size
; i
+= numbytes
)
110 numbytes
= make_srec (srec
, (CORE_ADDR
) (addr
+ i
), abfd
, s
,
116 puts_debug ("sent -->", srec
, "<--");
119 /* Repeatedly send the S-record until a good
120 acknowledgement is sent back. */
123 SERIAL_WRITE (desc
, srec
, reclen
);
124 if (ui_load_progress_hook
)
125 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
126 error ("Canceled the download");
128 while (waitack
!= NULL
&& !waitack ());
132 putchar_unfiltered ('#');
133 gdb_flush (gdb_stdout
);
135 } /* Per-packet (or S-record) loop */
137 if (ui_load_progress_hook
)
138 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
139 error ("Canceled the download");
140 putchar_unfiltered ('\n');
144 putchar_unfiltered ('\n');
146 end_time
= time (NULL
);
148 /* Write a terminator record. */
151 make_srec (srec
, abfd
->start_address
, NULL
, NULL
, 0, &reclen
, flags
);
156 puts_debug ("sent -->", srec
, "<--");
159 SERIAL_WRITE (desc
, srec
, reclen
);
161 /* Some monitors need these to wake up properly. (Which ones? -sts) */
162 SERIAL_WRITE (desc
, "\r\r", 2);
164 puts_debug ("sent -->", "\r\r", "<---");
166 SERIAL_FLUSH_INPUT (desc
);
168 report_transfer_performance (data_count
, start_time
, end_time
);
172 * make_srec -- make an srecord. This writes each line, one at a
173 * time, each with it's own header and trailer line.
174 * An srecord looks like this:
176 * byte count-+ address
177 * start ---+ | | data +- checksum
179 * S01000006F6B692D746573742E73726563E4
180 * S315000448600000000000000000FC00005900000000E9
181 * S31A0004000023C1400037DE00F023604000377B009020825000348D
182 * S30B0004485A0000000000004E
185 * S<type><length><address><data><checksum>
189 * is the number of bytes following upto the checksum. Note that
190 * this is not the number of chars following, since it takes two
191 * chars to represent a byte.
195 * 1) two byte address data record
196 * 2) three byte address data record
197 * 3) four byte address data record
198 * 7) four byte address termination record
199 * 8) three byte address termination record
200 * 9) two byte address termination record
203 * is the start address of the data following, or in the case of
204 * a termination record, the start address of the image
208 * is the sum of all the raw byte data in the record, from the length
209 * upwards, modulo 256 and subtracted from 255.
211 * This routine returns the length of the S-record.
216 make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
*abfd
, asection
*sect
,
217 int sectoff
, int *maxrecsize
, int flags
)
219 unsigned char checksum
;
221 const static char hextab
[] = "0123456789ABCDEF";
222 const static char data_code_table
[] = "123";
223 const static char term_code_table
[] = "987";
224 const static char header_code_table
[] = "000";
225 const static char *formats
[] =
229 char const *code_table
;
237 tmp
= flags
; /* Data or header record */
238 code_table
= abfd
? data_code_table
: header_code_table
;
239 binbuf
= alloca (*maxrecsize
/ 2);
243 tmp
= flags
>> SREC_TERM_SHIFT
; /* Term record */
244 code_table
= term_code_table
;
248 if ((tmp
& SREC_2_BYTE_ADDR
) && (targ_addr
<= 0xffff))
250 else if ((tmp
& SREC_3_BYTE_ADDR
) && (targ_addr
<= 0xffffff))
252 else if (tmp
& SREC_4_BYTE_ADDR
)
255 internal_error (__FILE__
, __LINE__
,
256 "make_srec: Bad address (0x%s), or bad flags (0x%x).",
257 paddr (targ_addr
), flags
);
259 /* Now that we know the address size, we can figure out how much
260 data this record can hold. */
264 payload_size
= (*maxrecsize
- (1 + 1 + 2 + addr_size
* 2 + 2)) / 2;
265 payload_size
= min (payload_size
, sect
->_raw_size
- sectoff
);
267 bfd_get_section_contents (abfd
, sect
, binbuf
, sectoff
, payload_size
);
270 payload_size
= 0; /* Term or header packets have no payload */
272 /* Output the header. */
274 sprintf (srec
, formats
[addr_size
- 2], code_table
[addr_size
- 2],
275 addr_size
+ payload_size
+ 1, (int) targ_addr
);
277 /* Note that the checksum is calculated on the raw data, not the
278 hexified data. It includes the length, address and the data
279 portions of the packet. */
283 checksum
+= (payload_size
+ addr_size
+ 1 /* Packet length */
284 + (targ_addr
& 0xff) /* Address... */
285 + ((targ_addr
>> 8) & 0xff)
286 + ((targ_addr
>> 16) & 0xff)
287 + ((targ_addr
>> 24) & 0xff));
289 p
= srec
+ 1 + 1 + 2 + addr_size
* 2;
291 /* Build the Srecord. */
292 for (tmp
= 0; tmp
< payload_size
; tmp
++)
297 *p
++ = hextab
[k
>> 4];
298 *p
++ = hextab
[k
& 0xf];
302 checksum
= ~checksum
;
304 *p
++ = hextab
[checksum
>> 4];
305 *p
++ = hextab
[checksum
& 0xf];
308 *maxrecsize
= p
- srec
;
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