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, Boston, MA 02111-1307, USA. */
25 int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
26 extern void report_transfer_performance PARAMS ((unsigned long, time_t, time_t));
28 extern int remote_debug;
30 static int make_srec PARAMS ((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 printf_filtered ("%s\t: 0x%08x .. 0x%08x ",
101 section_name, (int) addr, (int) addr + size);
102 gdb_flush (gdb_stdout);
106 for (i = 0; i < size; i += numbytes)
109 numbytes = make_srec (srec, (CORE_ADDR) (addr + i), abfd, s,
115 puts_debug ("sent -->", srec, "<--");
118 /* Repeatedly send the S-record until a good
119 acknowledgement is sent back. */
122 SERIAL_WRITE (desc, srec, reclen);
123 if (ui_load_progress_hook)
124 if (ui_load_progress_hook (section_name, (unsigned long) i))
125 error ("Canceled the download");
127 while (waitack != NULL && !waitack ());
131 putchar_unfiltered ('#');
132 gdb_flush (gdb_stdout);
134 } /* Per-packet (or S-record) loop */
136 if (ui_load_progress_hook)
137 if (ui_load_progress_hook (section_name, (unsigned long) i))
138 error ("Canceled the download");
139 putchar_unfiltered ('\n');
143 putchar_unfiltered ('\n');
145 end_time = time (NULL);
147 /* Write a terminator record. */
150 make_srec (srec, abfd->start_address, NULL, NULL, 0, &reclen, flags);
155 puts_debug ("sent -->", srec, "<--");
158 SERIAL_WRITE (desc, srec, reclen);
160 /* Some monitors need these to wake up properly. (Which ones? -sts) */
161 SERIAL_WRITE (desc, "\r\r", 2);
162 puts_debug ("sent -->", "\r\r", "<---");
164 SERIAL_FLUSH_INPUT (desc);
166 report_transfer_performance (data_count, start_time, end_time);
170 * make_srec -- make an srecord. This writes each line, one at a
171 * time, each with it's own header and trailer line.
172 * An srecord looks like this:
174 * byte count-+ address
175 * start ---+ | | data +- checksum
177 * S01000006F6B692D746573742E73726563E4
178 * S315000448600000000000000000FC00005900000000E9
179 * S31A0004000023C1400037DE00F023604000377B009020825000348D
180 * S30B0004485A0000000000004E
183 * S<type><length><address><data><checksum>
187 * is the number of bytes following upto the checksum. Note that
188 * this is not the number of chars following, since it takes two
189 * chars to represent a byte.
193 * 1) two byte address data record
194 * 2) three byte address data record
195 * 3) four byte address data record
196 * 7) four byte address termination record
197 * 8) three byte address termination record
198 * 9) two byte address termination record
201 * is the start address of the data following, or in the case of
202 * a termination record, the start address of the image
206 * is the sum of all the raw byte data in the record, from the length
207 * upwards, modulo 256 and subtracted from 255.
209 * This routine returns the length of the S-record.
214 make_srec (srec, targ_addr, abfd, sect, sectoff, maxrecsize, flags)
223 unsigned char checksum;
225 const static char hextab[] = "0123456789ABCDEF";
226 const static char data_code_table[] = "123";
227 const static char term_code_table[] = "987";
228 const static char header_code_table[] = "000";
229 const static char *formats[] = { "S%c%02X%04X",
232 char const *code_table;
240 tmp = flags; /* Data or header record */
241 code_table = abfd ? data_code_table : header_code_table;
242 binbuf = alloca (*maxrecsize/2);
246 tmp = flags >> SREC_TERM_SHIFT; /* Term record */
247 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 fatal ("make_srec: Bad address (0x%x), or bad flags (0x%x).",
260 /* Now that we know the address size, we can figure out how much
261 data this record can hold. */
265 payload_size = (*maxrecsize - (1 + 1 + 2 + addr_size * 2 + 2)) / 2;
266 payload_size = min (payload_size, sect->_raw_size - sectoff);
268 bfd_get_section_contents (abfd, sect, binbuf, sectoff, payload_size);
271 payload_size = 0; /* Term or header packets have no payload */
273 /* Output the header. */
275 sprintf (srec, formats[addr_size - 2], code_table[addr_size - 2],
276 addr_size + payload_size + 1, targ_addr);
278 /* Note that the checksum is calculated on the raw data, not the
279 hexified data. It includes the length, address and the data
280 portions of the packet. */
284 checksum += (payload_size + addr_size + 1 /* Packet length */
285 + (targ_addr & 0xff) /* Address... */
286 + ((targ_addr >> 8) & 0xff)
287 + ((targ_addr >> 16) & 0xff)
288 + ((targ_addr >> 24) & 0xff));
290 p = srec + 1 + 1 + 2 + addr_size * 2;
292 /* Build the Srecord. */
293 for (tmp = 0; tmp < payload_size; tmp++)
298 *p++ = hextab [k >> 4];
299 *p++ = hextab [k & 0xf];
303 checksum = ~checksum;
305 *p++ = hextab[checksum >> 4];
306 *p++ = hextab[checksum & 0xf];
309 *maxrecsize = p - srec;