1 /* S-record download support for GDB, the GNU debugger.
2 Copyright (C) 1995-2014 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 3 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, see <http://www.gnu.org/licenses/>. */
26 extern int remote_debug;
28 static int make_srec (char *srec, CORE_ADDR targ_addr, bfd * abfd,
29 asection * sect, int sectoff, int *maxrecsize,
32 /* Download an executable by converting it to S records. DESC is a
33 `struct serial *' to send the data to. FILE is the name of the
34 file to be loaded. LOAD_OFFSET is the offset into memory to load
35 data into. It is usually specified by the user and is useful with
36 the a.out file format. MAXRECSIZE is the length in chars of the
37 largest S-record the host can accomodate. This is measured from
38 the starting `S' to the last char of the checksum. FLAGS is
39 various random flags, and HASHMARK is non-zero to cause a `#' to be
40 printed out for each record loaded. WAITACK, if non-NULL, is a
41 function that waits for an acknowledgement after each S-record, and
42 returns non-zero if the ack is read correctly. */
45 load_srec (struct serial *desc, const char *file, bfd_vma load_offset,
47 int flags, int hashmark, int (*waitack) (void))
54 struct timeval start_time, end_time;
55 unsigned long data_count = 0;
56 struct cleanup *cleanup;
58 srec = (char *) alloca (maxrecsize + 1);
60 abfd = gdb_bfd_open (file, NULL, -1);
63 printf_filtered (_("Unable to open file %s\n"), file);
67 cleanup = make_cleanup_bfd_unref (abfd);
68 if (bfd_check_format (abfd, bfd_object) == 0)
70 printf_filtered (_("File is not an object file\n"));
71 do_cleanups (cleanup);
75 gettimeofday (&start_time, NULL);
77 /* Write a type 0 header record. no data for a type 0, and there
78 is no data, so len is 0. */
81 make_srec (srec, 0, NULL, (asection *) 1, 0, &reclen, flags);
85 puts_debug ("sent -->", srec, "<--");
87 serial_write (desc, srec, reclen);
89 for (s = abfd->sections; s; s = s->next)
90 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 (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: %s .. %s ",
103 paddress (target_gdbarch (), addr),
104 paddress (target_gdbarch (), 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 (deprecated_ui_load_progress_hook)
127 if (deprecated_ui_load_progress_hook (section_name,
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 (deprecated_ui_load_progress_hook)
141 if (deprecated_ui_load_progress_hook (section_name,
143 error (_("Canceled the download"));
144 putchar_unfiltered ('\n');
148 putchar_unfiltered ('\n');
150 gettimeofday (&end_time, NULL);
152 /* Write a terminator record. */
155 make_srec (srec, abfd->start_address, NULL, NULL, 0, &reclen, flags);
160 puts_debug ("sent -->", srec, "<--");
163 serial_write (desc, srec, reclen);
165 /* Some monitors need these to wake up properly. (Which ones? -sts) */
166 serial_write (desc, "\r\r", 2);
168 puts_debug ("sent -->", "\r\r", "<---");
170 serial_flush_input (desc);
172 print_transfer_performance (gdb_stdout, data_count, 0,
173 &start_time, &end_time);
174 do_cleanups (cleanup);
178 * make_srec -- make an srecord. This writes each line, one at a
179 * time, each with it's own header and trailer line.
180 * An srecord looks like this:
182 * byte count-+ address
183 * start ---+ | | data +- checksum
185 * S01000006F6B692D746573742E73726563E4
186 * S315000448600000000000000000FC00005900000000E9
187 * S31A0004000023C1400037DE00F023604000377B009020825000348D
188 * S30B0004485A0000000000004E
191 * S<type><length><address><data><checksum>
195 * is the number of bytes following upto the checksum. Note
196 * that this is not the number of chars following, since it
197 * takes two chars to represent a byte.
201 * 1) two byte address data record
202 * 2) three byte address data record
203 * 3) four byte address data record
204 * 7) four byte address termination record
205 * 8) three byte address termination record
206 * 9) two byte address termination record
209 * is the start address of the data following, or in the case of
210 * a termination record, the start address of the image
214 * is the sum of all the raw byte data in the record, from the length
215 * upwards, modulo 256 and subtracted from 255.
217 * This routine returns the length of the S-record.
222 make_srec (char *srec, CORE_ADDR targ_addr, bfd *abfd, asection *sect,
223 int sectoff, int *maxrecsize, int flags)
225 unsigned char checksum;
227 static const char hextab[] = "0123456789ABCDEF";
228 static const char data_code_table[] = "123";
229 static const char term_code_table[] = "987";
230 static const char header_code_table[] = "000";
231 char const *code_table;
239 tmp = flags; /* Data or header record */
240 code_table = abfd ? data_code_table : header_code_table;
241 binbuf = alloca (*maxrecsize / 2);
245 tmp = flags >> SREC_TERM_SHIFT; /* Term record */
246 code_table = term_code_table;
250 if ((tmp & SREC_2_BYTE_ADDR) && (targ_addr <= 0xffff))
252 else if ((tmp & SREC_3_BYTE_ADDR) && (targ_addr <= 0xffffff))
254 else if (tmp & SREC_4_BYTE_ADDR)
257 internal_error (__FILE__, __LINE__,
258 _("make_srec: Bad address (%s), or bad flags (0x%x)."),
259 paddress (target_gdbarch (), targ_addr), flags);
261 /* Now that we know the address size, we can figure out how much
262 data this record can hold. */
266 payload_size = (*maxrecsize - (1 + 1 + 2 + addr_size * 2 + 2)) / 2;
267 payload_size = min (payload_size, bfd_get_section_size (sect) - sectoff);
269 bfd_get_section_contents (abfd, sect, binbuf, sectoff, payload_size);
272 payload_size = 0; /* Term or header packets have no payload. */
274 /* Output the header. */
275 snprintf (srec, (*maxrecsize) + 1, "S%c%02X%0*X",
276 code_table[addr_size - 2],
277 addr_size + payload_size + 1,
278 addr_size * 2, (int) targ_addr);
280 /* Note that the checksum is calculated on the raw data, not the
281 hexified data. It includes the length, address and the data
282 portions of the packet. */
286 checksum += (payload_size + addr_size + 1 /* Packet length */
287 + (targ_addr & 0xff) /* Address... */
288 + ((targ_addr >> 8) & 0xff)
289 + ((targ_addr >> 16) & 0xff)
290 + ((targ_addr >> 24) & 0xff));
292 /* NOTE: cagney/2003-08-10: The equation is old. Check that the
293 recent snprintf changes match that equation. */
294 gdb_assert (strlen (srec) == 1 + 1 + 2 + addr_size * 2);
295 p = srec + 1 + 1 + 2 + addr_size * 2;
297 /* Build the Srecord. */
298 for (tmp = 0; tmp < payload_size; tmp++)
303 *p++ = hextab[k >> 4];
304 *p++ = hextab[k & 0xf];
308 checksum = ~checksum;
310 *p++ = hextab[checksum >> 4];
311 *p++ = hextab[checksum & 0xf];
314 *maxrecsize = p - srec;