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"
27 #include "gdb_string.h"
29 extern void report_transfer_performance (unsigned long, time_t, time_t);
31 extern int remote_debug
;
33 static int make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
* abfd
,
34 asection
* sect
, int sectoff
, int *maxrecsize
,
37 /* Download an executable by converting it to S records. DESC is a
38 `struct serial *' to send the data to. FILE is the name of the
39 file to be loaded. LOAD_OFFSET is the offset into memory to load
40 data into. It is usually specified by the user and is useful with
41 the a.out file format. MAXRECSIZE is the length in chars of the
42 largest S-record the host can accomodate. This is measured from
43 the starting `S' to the last char of the checksum. FLAGS is
44 various random flags, and HASHMARK is non-zero to cause a `#' to be
45 printed out for each record loaded. WAITACK, if non-NULL, is a
46 function that waits for an acknowledgement after each S-record, and
47 returns non-zero if the ack is read correctly. */
50 load_srec (struct serial
*desc
, const char *file
, bfd_vma load_offset
,
52 int flags
, int hashmark
, int (*waitack
) (void))
59 time_t start_time
, end_time
;
60 unsigned long data_count
= 0;
62 srec
= (char *) alloca (maxrecsize
+ 1);
64 abfd
= bfd_openr (file
, 0);
67 printf_filtered ("Unable to open file %s\n", file
);
71 if (bfd_check_format (abfd
, bfd_object
) == 0)
73 printf_filtered ("File is not an object file\n");
77 start_time
= time (NULL
);
79 /* Write a type 0 header record. no data for a type 0, and there
80 is no data, so len is 0. */
83 make_srec (srec
, 0, NULL
, (asection
*) 1, 0, &reclen
, flags
);
87 puts_debug ("sent -->", srec
, "<--");
89 serial_write (desc
, srec
, reclen
);
91 for (s
= abfd
->sections
; s
; s
= s
->next
)
92 if (s
->flags
& SEC_LOAD
)
95 bfd_vma addr
= bfd_get_section_vma (abfd
, s
) + load_offset
;
96 bfd_size_type size
= bfd_get_section_size_before_reloc (s
);
97 char *section_name
= (char *) bfd_get_section_name (abfd
, s
);
98 /* Both GDB and BFD have mechanisms for printing addresses.
99 In the below, GDB's is used so that the address is
100 consistent with the rest of GDB. BFD's printf_vma() could
101 have also been used. cagney 1999-09-01 */
102 printf_filtered ("%s\t: 0x%s .. 0x%s ",
105 paddr (addr
+ size
));
106 gdb_flush (gdb_stdout
);
110 for (i
= 0; i
< size
; i
+= numbytes
)
113 numbytes
= make_srec (srec
, (CORE_ADDR
) (addr
+ i
), abfd
, s
,
119 puts_debug ("sent -->", srec
, "<--");
122 /* Repeatedly send the S-record until a good
123 acknowledgement is sent back. */
126 serial_write (desc
, srec
, reclen
);
127 if (ui_load_progress_hook
)
128 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
129 error ("Canceled the download");
131 while (waitack
!= NULL
&& !waitack ());
135 putchar_unfiltered ('#');
136 gdb_flush (gdb_stdout
);
138 } /* Per-packet (or S-record) loop */
140 if (ui_load_progress_hook
)
141 if (ui_load_progress_hook (section_name
, (unsigned long) i
))
142 error ("Canceled the download");
143 putchar_unfiltered ('\n');
147 putchar_unfiltered ('\n');
149 end_time
= time (NULL
);
151 /* Write a terminator record. */
154 make_srec (srec
, abfd
->start_address
, NULL
, NULL
, 0, &reclen
, flags
);
159 puts_debug ("sent -->", srec
, "<--");
162 serial_write (desc
, srec
, reclen
);
164 /* Some monitors need these to wake up properly. (Which ones? -sts) */
165 serial_write (desc
, "\r\r", 2);
167 puts_debug ("sent -->", "\r\r", "<---");
169 serial_flush_input (desc
);
171 report_transfer_performance (data_count
, start_time
, end_time
);
175 * make_srec -- make an srecord. This writes each line, one at a
176 * time, each with it's own header and trailer line.
177 * An srecord looks like this:
179 * byte count-+ address
180 * start ---+ | | data +- checksum
182 * S01000006F6B692D746573742E73726563E4
183 * S315000448600000000000000000FC00005900000000E9
184 * S31A0004000023C1400037DE00F023604000377B009020825000348D
185 * S30B0004485A0000000000004E
188 * S<type><length><address><data><checksum>
192 * is the number of bytes following upto the checksum. Note that
193 * this is not the number of chars following, since it takes two
194 * chars to represent a byte.
198 * 1) two byte address data record
199 * 2) three byte address data record
200 * 3) four byte address data record
201 * 7) four byte address termination record
202 * 8) three byte address termination record
203 * 9) two byte address termination record
206 * is the start address of the data following, or in the case of
207 * a termination record, the start address of the image
211 * is the sum of all the raw byte data in the record, from the length
212 * upwards, modulo 256 and subtracted from 255.
214 * This routine returns the length of the S-record.
219 make_srec (char *srec
, CORE_ADDR targ_addr
, bfd
*abfd
, asection
*sect
,
220 int sectoff
, int *maxrecsize
, int flags
)
222 unsigned char checksum
;
224 const static char hextab
[] = "0123456789ABCDEF";
225 const static char data_code_table
[] = "123";
226 const static char term_code_table
[] = "987";
227 const static char header_code_table
[] = "000";
228 char const *code_table
;
236 tmp
= flags
; /* Data or header record */
237 code_table
= abfd
? data_code_table
: header_code_table
;
238 binbuf
= alloca (*maxrecsize
/ 2);
242 tmp
= flags
>> SREC_TERM_SHIFT
; /* Term record */
243 code_table
= term_code_table
;
247 if ((tmp
& SREC_2_BYTE_ADDR
) && (targ_addr
<= 0xffff))
249 else if ((tmp
& SREC_3_BYTE_ADDR
) && (targ_addr
<= 0xffffff))
251 else if (tmp
& SREC_4_BYTE_ADDR
)
254 internal_error (__FILE__
, __LINE__
,
255 "make_srec: Bad address (0x%s), or bad flags (0x%x).",
256 paddr (targ_addr
), flags
);
258 /* Now that we know the address size, we can figure out how much
259 data this record can hold. */
263 payload_size
= (*maxrecsize
- (1 + 1 + 2 + addr_size
* 2 + 2)) / 2;
264 payload_size
= min (payload_size
, sect
->_raw_size
- sectoff
);
266 bfd_get_section_contents (abfd
, sect
, binbuf
, sectoff
, payload_size
);
269 payload_size
= 0; /* Term or header packets have no payload */
271 /* Output the header. */
272 snprintf (srec
, (*maxrecsize
) + 1, "S%c%02X%0*X",
273 code_table
[addr_size
- 2],
274 addr_size
+ payload_size
+ 1,
275 addr_size
* 2, (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 /* NOTE: cagney/2003-08-10: The equation is old. Check that the
290 recent snprintf changes match that equation. */
291 gdb_assert (strlen (srec
) == 1 + 1 + 2 + addr_size
* 2);
292 p
= srec
+ 1 + 1 + 2 + addr_size
* 2;
294 /* Build the Srecord. */
295 for (tmp
= 0; tmp
< payload_size
; tmp
++)
300 *p
++ = hextab
[k
>> 4];
301 *p
++ = hextab
[k
& 0xf];
305 checksum
= ~checksum
;
307 *p
++ = hextab
[checksum
>> 4];
308 *p
++ = hextab
[checksum
& 0xf];
311 *maxrecsize
= p
- srec
;
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