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5c8ba017 SG |
1 | /* S-record download support for GDB, the GNU debugger. |
2 | Copyright 1995 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "serial.h" | |
22 | #include "srec.h" | |
23 | ||
24 | extern int remote_debug; | |
25 | ||
26 | static int make_srec PARAMS ((char *srec, CORE_ADDR targ_addr, bfd *abfd, | |
27 | asection *sect, int sectoff, int *maxrecsize, | |
28 | int flags)); | |
29 | ||
30 | /* Download an executable by converting it to S records. DESC is a serial_t | |
31 | to send the data to. FILE is the name of the file to be loaded. | |
32 | MAXRECSIZE is the length in chars of the largest S-record the host can | |
33 | accomodate. This is measured from the starting `S' to the last char of the | |
34 | checksum. FLAGS is various random flags, and HASHMARK is non-zero to cause | |
35 | a `#' to be printed out for each record loaded. */ | |
36 | ||
37 | void | |
38 | load_srec (desc, file, maxrecsize, flags, hashmark) | |
39 | serial_t desc; | |
40 | const char *file; | |
41 | int maxrecsize; | |
42 | int flags; | |
43 | int hashmark; | |
44 | { | |
45 | bfd *abfd; | |
46 | asection *s; | |
47 | char *buffer, srec[1024]; | |
48 | int i; | |
49 | int reclen; | |
50 | ||
51 | buffer = alloca (maxrecsize + 1); | |
52 | ||
53 | abfd = bfd_openr (file, 0); | |
54 | if (!abfd) | |
55 | { | |
56 | printf_filtered ("Unable to open file %s\n", file); | |
57 | return; | |
58 | } | |
59 | ||
60 | if (bfd_check_format (abfd, bfd_object) == 0) | |
61 | { | |
62 | printf_filtered ("File is not an object file\n"); | |
63 | return; | |
64 | } | |
65 | ||
66 | for (s = abfd->sections; s; s = s->next) | |
67 | if (s->flags & SEC_LOAD) | |
68 | { | |
69 | int numbytes; | |
70 | ||
71 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
72 | s->vma + s->_raw_size); | |
73 | gdb_flush (gdb_stdout); | |
74 | ||
75 | for (i = 0; i < s->_raw_size; i += numbytes) | |
76 | { | |
77 | reclen = maxrecsize; | |
78 | numbytes = make_srec (srec, s->vma + i, abfd, s, i, &reclen, | |
79 | flags); | |
80 | ||
81 | if (remote_debug) | |
b9ab37f0 | 82 | fprintf_unfiltered (gdb_stderr, "%.*s\\r\n", reclen-1, srec); |
5c8ba017 SG |
83 | SERIAL_WRITE (desc, srec, reclen); |
84 | ||
85 | if (hashmark) | |
86 | { | |
87 | putchar_unfiltered ('#'); | |
88 | gdb_flush (gdb_stdout); | |
89 | } | |
90 | } /* Per-packet (or S-record) loop */ | |
91 | ||
92 | putchar_unfiltered ('\n'); | |
93 | } /* Loadable sections */ | |
94 | ||
95 | if (hashmark) | |
96 | putchar_unfiltered ('\n'); | |
97 | ||
98 | /* Write a type 7 terminator record. no data for a type 7, and there | |
99 | is no data, so len is 0. */ | |
100 | ||
101 | reclen = maxrecsize; | |
102 | make_srec (srec, abfd->start_address, NULL, NULL, 0, &reclen, flags); | |
103 | ||
104 | if (remote_debug) | |
b9ab37f0 | 105 | fprintf_unfiltered (gdb_stderr, "%.*s\\r\n", reclen-1, srec); |
5c8ba017 SG |
106 | SERIAL_WRITE (desc, srec, reclen); |
107 | ||
98a2c9d2 | 108 | SERIAL_WRITE (desc, "\r\r", 2); /* Some monitors need these to wake up */ |
5c8ba017 SG |
109 | |
110 | SERIAL_FLUSH_INPUT (desc); | |
111 | } | |
112 | ||
113 | /* | |
114 | * make_srec -- make an srecord. This writes each line, one at a | |
115 | * time, each with it's own header and trailer line. | |
116 | * An srecord looks like this: | |
117 | * | |
118 | * byte count-+ address | |
119 | * start ---+ | | data +- checksum | |
120 | * | | | | | |
121 | * S01000006F6B692D746573742E73726563E4 | |
122 | * S315000448600000000000000000FC00005900000000E9 | |
123 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
124 | * S30B0004485A0000000000004E | |
125 | * S70500040000F6 | |
126 | * | |
127 | * S<type><length><address><data><checksum> | |
128 | * | |
129 | * Where | |
130 | * - length | |
131 | * is the number of bytes following upto the checksum. Note that | |
132 | * this is not the number of chars following, since it takes two | |
133 | * chars to represent a byte. | |
134 | * - type | |
135 | * is one of: | |
136 | * 0) header record | |
137 | * 1) two byte address data record | |
138 | * 2) three byte address data record | |
139 | * 3) four byte address data record | |
140 | * 7) four byte address termination record | |
141 | * 8) three byte address termination record | |
142 | * 9) two byte address termination record | |
143 | * | |
144 | * - address | |
145 | * is the start address of the data following, or in the case of | |
146 | * a termination record, the start address of the image | |
147 | * - data | |
148 | * is the data. | |
149 | * - checksum | |
150 | * is the sum of all the raw byte data in the record, from the length | |
151 | * upwards, modulo 256 and subtracted from 255. | |
152 | * | |
153 | * This routine returns the length of the S-record. | |
154 | * | |
155 | */ | |
156 | ||
157 | static int | |
158 | make_srec (srec, targ_addr, abfd, sect, sectoff, maxrecsize, flags) | |
159 | char *srec; | |
160 | CORE_ADDR targ_addr; | |
161 | bfd *abfd; | |
162 | asection *sect; | |
163 | int sectoff; | |
164 | int *maxrecsize; | |
165 | int flags; | |
166 | { | |
167 | unsigned char checksum; | |
168 | int tmp; | |
169 | const static char hextab[] = "0123456789ABCDEF"; | |
170 | const static char data_code_table[] = "xx123"; | |
171 | const static char term_code_table[] = "xx987"; | |
172 | const static char *formats[] = {NULL, NULL, "S%c%02X%04X", "S%c%02X%06X", | |
173 | "S%c%02X%08X"}; | |
174 | char const *code_table; | |
175 | int addr_size; | |
176 | int payload_size; | |
177 | int type_code; | |
178 | char *binbuf; | |
179 | char *p; | |
180 | ||
181 | if (sect) | |
182 | { | |
183 | tmp = flags; /* Data record */ | |
184 | code_table = data_code_table; | |
185 | binbuf = alloca (*maxrecsize/2); | |
186 | } | |
187 | else | |
188 | { | |
189 | tmp = flags >> SREC_TERM_SHIFT; /* Term record */ | |
190 | code_table = term_code_table; | |
191 | } | |
192 | ||
193 | if (tmp & SREC_4_BYTE_ADDR && targ_addr > 0xffffff) | |
194 | addr_size = 4; | |
195 | else if (tmp & SREC_3_BYTE_ADDR && targ_addr > 0xffff) | |
196 | addr_size = 3; | |
197 | else if (tmp & SREC_2_BYTE_ADDR && targ_addr > 0xff) | |
198 | addr_size = 2; | |
199 | else | |
200 | fatal ("make_srec: Bad address (0x%x), or bad flags (0x%x).", targ_addr, | |
201 | flags); | |
202 | ||
203 | /* Now that we know the address size, we can figure out how much data this | |
204 | record can hold. */ | |
205 | ||
206 | if (sect) | |
207 | { | |
208 | payload_size = (*maxrecsize - (1 + 1 + 2 + addr_size * 2 + 2)) / 2; | |
209 | payload_size = min (payload_size, sect->_raw_size - sectoff); | |
210 | ||
211 | bfd_get_section_contents (abfd, sect, binbuf, sectoff, payload_size); | |
212 | } | |
213 | else | |
214 | payload_size = 0; /* Term packets have no payload */ | |
215 | ||
216 | /* Output the header. */ | |
217 | ||
218 | sprintf (srec, formats[addr_size], code_table[addr_size], | |
219 | addr_size + payload_size + 1, targ_addr); | |
220 | ||
221 | /* Note that the checksum is calculated on the raw data, not the hexified | |
222 | data. It includes the length, address and the data portions of the | |
223 | packet. */ | |
224 | ||
225 | checksum = 0; | |
226 | ||
227 | checksum += (payload_size + addr_size + 1 /* Packet length */ | |
228 | + (targ_addr & 0xff) /* Address... */ | |
229 | + ((targ_addr >> 8) & 0xff) | |
230 | + ((targ_addr >> 16) & 0xff) | |
231 | + ((targ_addr >> 24) & 0xff)); | |
232 | ||
233 | p = srec + 1 + 1 + 2 + addr_size * 2; | |
234 | ||
235 | /* build the srecord */ | |
236 | for (tmp = 0; tmp < payload_size; tmp++) | |
237 | { | |
238 | unsigned char k; | |
239 | ||
240 | k = binbuf[tmp]; | |
241 | *p++ = hextab [k >> 4]; | |
242 | *p++ = hextab [k & 0xf]; | |
243 | checksum += k; | |
244 | } | |
245 | ||
246 | checksum = ~checksum; | |
247 | ||
248 | *p++ = hextab[checksum >> 4]; | |
249 | *p++ = hextab[checksum & 0xf]; | |
250 | *p++ = '\r'; | |
251 | ||
252 | *maxrecsize = p - srec; | |
253 | return payload_size; | |
254 | } |