1 /* S-record download support for GDB, the GNU debugger.
2 Copyright (C) 1995-1997, 1999-2001, 2003-2004, 2007-2012 Free
3 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 3 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, see <http://www.gnu.org/licenses/>. */
24 #include "gdb_assert.h"
25 #include "gdb_string.h"
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 `struct serial *' to send the data to. FILE is the name of the
37 file to be loaded. LOAD_OFFSET is the offset into memory to load
38 data into. It is usually specified by the user and is useful with
39 the a.out file format. MAXRECSIZE is the length in chars of the
40 largest S-record the host can accomodate. This is measured from
41 the starting `S' to the last char of the checksum. FLAGS is
42 various 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, and
45 returns non-zero if the ack is read correctly. */
48 load_srec (struct serial *desc, const char *file, bfd_vma load_offset,
50 int flags, int hashmark, int (*waitack) (void))
57 time_t start_time, end_time;
58 unsigned long data_count = 0;
60 srec = (char *) alloca (maxrecsize + 1);
62 abfd = bfd_openr (file, 0);
65 printf_filtered (_("Unable to open file %s\n"), file);
69 if (bfd_check_format (abfd, bfd_object) == 0)
71 printf_filtered (_("File is not an object file\n"));
75 start_time = 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 end_time = 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 report_transfer_performance (data_count, start_time, end_time);
176 * make_srec -- make an srecord. This writes each line, one at a
177 * time, each with it's own header and trailer line.
178 * An srecord looks like this:
180 * byte count-+ address
181 * start ---+ | | data +- checksum
183 * S01000006F6B692D746573742E73726563E4
184 * S315000448600000000000000000FC00005900000000E9
185 * S31A0004000023C1400037DE00F023604000377B009020825000348D
186 * S30B0004485A0000000000004E
189 * S<type><length><address><data><checksum>
193 * is the number of bytes following upto the checksum. Note
194 * that this is not the number of chars following, since it
195 * takes two chars to represent a byte.
199 * 1) two byte address data record
200 * 2) three byte address data record
201 * 3) four byte address data record
202 * 7) four byte address termination record
203 * 8) three byte address termination record
204 * 9) two byte address termination record
207 * is the start address of the data following, or in the case of
208 * a termination record, the start address of the image
212 * is the sum of all the raw byte data in the record, from the length
213 * upwards, modulo 256 and subtracted from 255.
215 * This routine returns the length of the S-record.
220 make_srec (char *srec, CORE_ADDR targ_addr, bfd *abfd, asection *sect,
221 int sectoff, int *maxrecsize, int 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 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 (%s), or bad flags (0x%x)."),
257 paddress (target_gdbarch, 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, bfd_get_section_size (sect) - 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. */
273 snprintf (srec, (*maxrecsize) + 1, "S%c%02X%0*X",
274 code_table[addr_size - 2],
275 addr_size + payload_size + 1,
276 addr_size * 2, (int) 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 /* NOTE: cagney/2003-08-10: The equation is old. Check that the
291 recent snprintf changes match that equation. */
292 gdb_assert (strlen (srec) == 1 + 1 + 2 + addr_size * 2);
293 p = srec + 1 + 1 + 2 + addr_size * 2;
295 /* Build the Srecord. */
296 for (tmp = 0; tmp < payload_size; tmp++)
301 *p++ = hextab[k >> 4];
302 *p++ = hextab[k & 0xf];
306 checksum = ~checksum;
308 *p++ = hextab[checksum >> 4];
309 *p++ = hextab[checksum & 0xf];
312 *maxrecsize = p - srec;