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. */
26 #include "gdb_assert.h"
28 extern void report_transfer_performance (unsigned long, time_t, time_t);
30 extern int remote_debug
;
32 static int make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
* abfd
,
33 asection
* sect
, int sectoff
, int *maxrecsize
,
36 /* Download an executable by converting it to S records. DESC is a
37 `struct serial *' to send the data to. FILE is the name of the
38 file to be loaded. LOAD_OFFSET is the offset into memory to load
39 data into. It is usually specified by the user and is useful with
40 the a.out file format. MAXRECSIZE is the length in chars of the
41 largest S-record the host can accomodate. This is measured from
42 the starting `S' to the last char of the checksum. FLAGS is
43 various random flags, and HASHMARK is non-zero to cause a `#' to be
44 printed out for each record loaded. WAITACK, if non-NULL, is a
45 function that waits for an acknowledgement after each S-record, and
46 returns non-zero if the ack is read correctly. */
49 load_srec (struct serial
*desc
, const char *file
, bfd_vma load_offset
,
51 int flags
, int hashmark
, int (*waitack
) (void))
58 time_t start_time
, end_time
;
59 unsigned long data_count
= 0;
61 srec
= (char *) alloca (maxrecsize
+ 1);
63 abfd
= bfd_openr (file
, 0);
66 printf_filtered ("Unable to open file %s\n", file
);
70 if (bfd_check_format (abfd
, bfd_object
) == 0)
72 printf_filtered ("File is not an object file\n");
76 start_time
= time (NULL
);
78 /* Write a type 0 header record. no data for a type 0, and there
79 is no data, so len is 0. */
82 make_srec (srec
, 0, NULL
, (asection
*) 1, 0, &reclen
, flags
);
86 puts_debug ("sent -->", srec
, "<--");
88 serial_write (desc
, srec
, reclen
);
90 for (s
= abfd
->sections
; s
; s
= s
->next
)
91 if (s
->flags
& SEC_LOAD
)
94 bfd_vma addr
= bfd_get_section_vma (abfd
, s
) + load_offset
;
95 bfd_size_type size
= bfd_get_section_size_before_reloc (s
);
96 char *section_name
= (char *) bfd_get_section_name (abfd
, s
);
97 /* Both GDB and BFD have mechanisms for printing addresses.
98 In the below, GDB's is used so that the address is
99 consistent with the rest of GDB. BFD's printf_vma() could
100 have also been used. cagney 1999-09-01 */
101 printf_filtered ("%s\t: 0x%s .. 0x%s ",
104 paddr (addr
+ size
));
105 gdb_flush (gdb_stdout
);
109 for (i
= 0; i
< size
; i
+= numbytes
)
112 numbytes
= make_srec (srec
, (CORE_ADDR
) (addr
+ i
), abfd
, s
,
118 puts_debug ("sent -->", srec
, "<--");
121 /* Repeatedly send the S-record until a good
122 acknowledgement is sent back. */
125 serial_write (desc
, srec
, reclen
);
126 if (ui_load_progress_hook
)
127 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
128 error ("Canceled the download");
130 while (waitack
!= NULL
&& !waitack ());
134 putchar_unfiltered ('#');
135 gdb_flush (gdb_stdout
);
137 } /* Per-packet (or S-record) loop */
139 if (ui_load_progress_hook
)
140 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
141 error ("Canceled the download");
142 putchar_unfiltered ('\n');
146 putchar_unfiltered ('\n');
148 end_time
= time (NULL
);
150 /* Write a terminator record. */
153 make_srec (srec
, abfd
->start_address
, NULL
, NULL
, 0, &reclen
, flags
);
158 puts_debug ("sent -->", srec
, "<--");
161 serial_write (desc
, srec
, reclen
);
163 /* Some monitors need these to wake up properly. (Which ones? -sts) */
164 serial_write (desc
, "\r\r", 2);
166 puts_debug ("sent -->", "\r\r", "<---");
168 serial_flush_input (desc
);
170 report_transfer_performance (data_count
, start_time
, end_time
);
174 * make_srec -- make an srecord. This writes each line, one at a
175 * time, each with it's own header and trailer line.
176 * An srecord looks like this:
178 * byte count-+ address
179 * start ---+ | | data +- checksum
181 * S01000006F6B692D746573742E73726563E4
182 * S315000448600000000000000000FC00005900000000E9
183 * S31A0004000023C1400037DE00F023604000377B009020825000348D
184 * S30B0004485A0000000000004E
187 * S<type><length><address><data><checksum>
191 * is the number of bytes following upto the checksum. Note that
192 * this is not the number of chars following, since it takes two
193 * chars to represent a byte.
197 * 1) two byte address data record
198 * 2) three byte address data record
199 * 3) four byte address data record
200 * 7) four byte address termination record
201 * 8) three byte address termination record
202 * 9) two byte address termination record
205 * is the start address of the data following, or in the case of
206 * a termination record, the start address of the image
210 * is the sum of all the raw byte data in the record, from the length
211 * upwards, modulo 256 and subtracted from 255.
213 * This routine returns the length of the S-record.
218 make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
*abfd
, asection
*sect
,
219 int sectoff
, int *maxrecsize
, int flags
)
221 unsigned char checksum
;
223 const static char hextab
[] = "0123456789ABCDEF";
224 const static char data_code_table
[] = "123";
225 const static char term_code_table
[] = "987";
226 const static char header_code_table
[] = "000";
227 char const *code_table
;
235 tmp
= flags
; /* Data or header record */
236 code_table
= abfd
? data_code_table
: header_code_table
;
237 binbuf
= alloca (*maxrecsize
/ 2);
241 tmp
= flags
>> SREC_TERM_SHIFT
; /* Term record */
242 code_table
= term_code_table
;
246 if ((tmp
& SREC_2_BYTE_ADDR
) && (targ_addr
<= 0xffff))
248 else if ((tmp
& SREC_3_BYTE_ADDR
) && (targ_addr
<= 0xffffff))
250 else if (tmp
& SREC_4_BYTE_ADDR
)
253 internal_error (__FILE__
, __LINE__
,
254 "make_srec: Bad address (0x%s), or bad flags (0x%x).",
255 paddr (targ_addr
), flags
);
257 /* Now that we know the address size, we can figure out how much
258 data this record can hold. */
262 payload_size
= (*maxrecsize
- (1 + 1 + 2 + addr_size
* 2 + 2)) / 2;
263 payload_size
= min (payload_size
, sect
->_raw_size
- sectoff
);
265 bfd_get_section_contents (abfd
, sect
, binbuf
, sectoff
, payload_size
);
268 payload_size
= 0; /* Term or header packets have no payload */
270 /* Output the header. */
271 snprintf (srec
, (*maxrecsize
) + 1, "S%c%02X%0*X",
272 code_table
[addr_size
- 2],
273 addr_size
+ payload_size
+ 1,
274 addr_size
* 2, (int) targ_addr
);
276 /* Note that the checksum is calculated on the raw data, not the
277 hexified data. It includes the length, address and the data
278 portions of the packet. */
282 checksum
+= (payload_size
+ addr_size
+ 1 /* Packet length */
283 + (targ_addr
& 0xff) /* Address... */
284 + ((targ_addr
>> 8) & 0xff)
285 + ((targ_addr
>> 16) & 0xff)
286 + ((targ_addr
>> 24) & 0xff));
288 /* NOTE: cagney/2003-08-10: The equation is old. Check that the
289 recent snprintf changes match that equation. */
290 gdb_assert (strlen (srec
) == 1 + 1 + 2 + addr_size
* 2);
291 p
= srec
+ 1 + 1 + 2 + addr_size
* 2;
293 /* Build the Srecord. */
294 for (tmp
= 0; tmp
< payload_size
; tmp
++)
299 *p
++ = hextab
[k
>> 4];
300 *p
++ = hextab
[k
& 0xf];
304 checksum
= ~checksum
;
306 *p
++ = hextab
[checksum
>> 4];
307 *p
++ = hextab
[checksum
& 0xf];
310 *maxrecsize
= p
- srec
;
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