]>
Commit | Line | Data |
---|---|---|
ed3ef339 DE |
1 | /* Support for connecting Guile's stdio to GDB's. |
2 | as well as r/w memory via ports. | |
3 | ||
3666a048 | 4 | Copyright (C) 2014-2021 Free Software Foundation, Inc. |
ed3ef339 DE |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | /* See README file in this directory for implementation notes, coding | |
22 | conventions, et.al. */ | |
23 | ||
24 | #include "defs.h" | |
06cc9596 | 25 | #include "gdbsupport/gdb_select.h" |
cb814510 | 26 | #include "top.h" |
ed3ef339 DE |
27 | #include "target.h" |
28 | #include "guile-internal.h" | |
268a13a5 | 29 | #include "gdbsupport/gdb_optional.h" |
ed3ef339 DE |
30 | |
31 | #ifdef HAVE_POLL | |
32 | #if defined (HAVE_POLL_H) | |
33 | #include <poll.h> | |
34 | #elif defined (HAVE_SYS_POLL_H) | |
35 | #include <sys/poll.h> | |
36 | #endif | |
37 | #endif | |
38 | ||
68cf161c LC |
39 | /* Whether we're using Guile < 2.2 and its clumsy port API. */ |
40 | ||
41 | #define USING_GUILE_BEFORE_2_2 \ | |
42 | (SCM_MAJOR_VERSION == 2 && SCM_MINOR_VERSION == 0) | |
43 | ||
44 | ||
ed3ef339 DE |
45 | /* A ui-file for sending output to Guile. */ |
46 | ||
d7e74731 | 47 | class ioscm_file_port : public ui_file |
ed3ef339 | 48 | { |
d7e74731 PA |
49 | public: |
50 | /* Return a ui_file that writes to PORT. */ | |
51 | explicit ioscm_file_port (SCM port); | |
52 | ||
53 | void flush () override; | |
54 | void write (const char *buf, long length_buf) override; | |
55 | ||
56 | private: | |
57 | SCM m_port; | |
58 | }; | |
ed3ef339 DE |
59 | |
60 | /* Data for a memory port. */ | |
61 | ||
f99b5177 | 62 | struct ioscm_memory_port |
ed3ef339 | 63 | { |
37442ce1 DE |
64 | /* Bounds of memory range this port is allowed to access: [start, end). |
65 | This means that 0xff..ff is not accessible. I can live with that. */ | |
ed3ef339 DE |
66 | CORE_ADDR start, end; |
67 | ||
37442ce1 | 68 | /* (end - start), recorded for convenience. */ |
ed3ef339 DE |
69 | ULONGEST size; |
70 | ||
71 | /* Think of this as the lseek value maintained by the kernel. | |
72 | This value is always in the range [0, size]. */ | |
73 | ULONGEST current; | |
74 | ||
68cf161c | 75 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
76 | /* The size of the internal r/w buffers. |
77 | Scheme ports aren't a straightforward mapping to memory r/w. | |
78 | Generally the user specifies how much to r/w and all access is | |
79 | unbuffered. We don't try to provide equivalent access, but we allow | |
80 | the user to specify these values to help get something similar. */ | |
81 | unsigned read_buf_size, write_buf_size; | |
68cf161c | 82 | #endif |
f99b5177 | 83 | }; |
ed3ef339 DE |
84 | |
85 | /* Copies of the original system input/output/error ports. | |
86 | These are recorded for debugging purposes. */ | |
87 | static SCM orig_input_port_scm; | |
88 | static SCM orig_output_port_scm; | |
89 | static SCM orig_error_port_scm; | |
90 | ||
91 | /* This is the stdio port descriptor, scm_ptob_descriptor. */ | |
68cf161c | 92 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 | 93 | static scm_t_bits stdio_port_desc; |
68cf161c LC |
94 | #else |
95 | static scm_t_port_type *stdio_port_desc; | |
96 | #endif | |
ed3ef339 DE |
97 | |
98 | /* Note: scm_make_port_type takes a char * instead of a const char *. */ | |
99 | static /*const*/ char stdio_port_desc_name[] = "gdb:stdio-port"; | |
100 | ||
101 | /* Names of each gdb port. */ | |
102 | static const char input_port_name[] = "gdb:stdin"; | |
103 | static const char output_port_name[] = "gdb:stdout"; | |
104 | static const char error_port_name[] = "gdb:stderr"; | |
105 | ||
106 | /* This is the actual port used from Guile. | |
107 | We don't expose these to the user though, to ensure they're not | |
108 | overwritten. */ | |
109 | static SCM input_port_scm; | |
110 | static SCM output_port_scm; | |
111 | static SCM error_port_scm; | |
112 | ||
ed3ef339 DE |
113 | /* Internal enum for specifying output port. */ |
114 | enum oport { GDB_STDOUT, GDB_STDERR }; | |
115 | ||
116 | /* This is the memory port descriptor, scm_ptob_descriptor. */ | |
68cf161c | 117 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 | 118 | static scm_t_bits memory_port_desc; |
68cf161c LC |
119 | #else |
120 | static scm_t_port_type *memory_port_desc; | |
121 | #endif | |
ed3ef339 DE |
122 | |
123 | /* Note: scm_make_port_type takes a char * instead of a const char *. */ | |
124 | static /*const*/ char memory_port_desc_name[] = "gdb:memory-port"; | |
125 | ||
68cf161c LC |
126 | #if USING_GUILE_BEFORE_2_2 |
127 | ||
ed3ef339 DE |
128 | /* The default amount of memory to fetch for each read/write request. |
129 | Scheme ports don't provide a way to specify the size of a read, | |
130 | which is important to us to minimize the number of inferior interactions, | |
131 | which over a remote link can be important. To compensate we augment the | |
132 | port API with a new function that let's the user specify how much the next | |
133 | read request should fetch. This is the initial value for each new port. */ | |
134 | static const unsigned default_read_buf_size = 16; | |
135 | static const unsigned default_write_buf_size = 16; | |
136 | ||
137 | /* Arbitrarily limit memory port buffers to 1 byte to 4K. */ | |
138 | static const unsigned min_memory_port_buf_size = 1; | |
139 | static const unsigned max_memory_port_buf_size = 4096; | |
140 | ||
141 | /* "out of range" error message for buf sizes. */ | |
142 | static char *out_of_range_buf_size; | |
143 | ||
68cf161c LC |
144 | #else |
145 | ||
146 | /* The maximum values to use for get_natural_buffer_sizes. */ | |
147 | static const unsigned natural_buf_size = 16; | |
148 | ||
149 | #endif | |
150 | ||
ed3ef339 DE |
151 | /* Keywords used by open-memory. */ |
152 | static SCM mode_keyword; | |
153 | static SCM start_keyword; | |
154 | static SCM size_keyword; | |
155 | \f | |
68cf161c LC |
156 | /* Helper to do the low level work of opening a port. */ |
157 | ||
158 | #if USING_GUILE_BEFORE_2_2 | |
ed3ef339 DE |
159 | |
160 | static SCM | |
68cf161c | 161 | ioscm_open_port (scm_t_bits port_type, long mode_bits, scm_t_bits stream) |
ed3ef339 DE |
162 | { |
163 | SCM port; | |
164 | ||
165 | #if 0 /* TODO: Guile doesn't export this. What to do? */ | |
166 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); | |
167 | #endif | |
168 | ||
169 | port = scm_new_port_table_entry (port_type); | |
170 | ||
171 | SCM_SET_CELL_TYPE (port, port_type | mode_bits); | |
68cf161c | 172 | SCM_SETSTREAM (port, stream); |
ed3ef339 DE |
173 | |
174 | #if 0 /* TODO: Guile doesn't export this. What to do? */ | |
175 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); | |
176 | #endif | |
177 | ||
178 | return port; | |
179 | } | |
68cf161c LC |
180 | |
181 | #else | |
182 | ||
183 | static SCM | |
184 | ioscm_open_port (scm_t_port_type *port_type, long mode_bits, scm_t_bits stream) | |
185 | { | |
186 | return scm_c_make_port (port_type, mode_bits, stream); | |
187 | } | |
188 | ||
189 | #endif | |
190 | ||
ed3ef339 DE |
191 | \f |
192 | /* Support for connecting Guile's stdio ports to GDB's stdio ports. */ | |
193 | ||
68cf161c LC |
194 | /* Like fputstrn_filtered, but don't escape characters, except nul. |
195 | Also like fputs_filtered, but a length is specified. */ | |
196 | ||
197 | static void | |
198 | fputsn_filtered (const char *s, size_t size, struct ui_file *stream) | |
199 | { | |
200 | size_t i; | |
201 | ||
202 | for (i = 0; i < size; ++i) | |
203 | { | |
204 | if (s[i] == '\0') | |
205 | fputs_filtered ("\\000", stream); | |
206 | else | |
207 | fputc_filtered (s[i], stream); | |
208 | } | |
209 | } | |
210 | ||
211 | #if USING_GUILE_BEFORE_2_2 | |
212 | ||
ed3ef339 DE |
213 | /* The scm_t_ptob_descriptor.input_waiting "method". |
214 | Return a lower bound on the number of bytes available for input. */ | |
215 | ||
216 | static int | |
217 | ioscm_input_waiting (SCM port) | |
218 | { | |
219 | int fdes = 0; | |
220 | ||
221 | if (! scm_is_eq (port, input_port_scm)) | |
222 | return 0; | |
223 | ||
224 | #ifdef HAVE_POLL | |
225 | { | |
226 | /* This is copied from libguile/fports.c. */ | |
227 | struct pollfd pollfd = { fdes, POLLIN, 0 }; | |
228 | static int use_poll = -1; | |
229 | ||
230 | if (use_poll < 0) | |
231 | { | |
232 | /* This is copied from event-loop.c: poll cannot be used for stdin on | |
233 | m68k-motorola-sysv. */ | |
234 | struct pollfd test_pollfd = { fdes, POLLIN, 0 }; | |
235 | ||
236 | if (poll (&test_pollfd, 1, 0) == 1 && (test_pollfd.revents & POLLNVAL)) | |
237 | use_poll = 0; | |
238 | else | |
239 | use_poll = 1; | |
240 | } | |
241 | ||
242 | if (use_poll) | |
243 | { | |
244 | /* Guile doesn't export SIGINT hooks like Python does. | |
245 | For now pass EINTR to scm_syserror, that's what fports.c does. */ | |
246 | if (poll (&pollfd, 1, 0) < 0) | |
247 | scm_syserror (FUNC_NAME); | |
248 | ||
249 | return pollfd.revents & POLLIN ? 1 : 0; | |
250 | } | |
251 | } | |
252 | /* Fall through. */ | |
253 | #endif | |
254 | ||
255 | { | |
256 | struct timeval timeout; | |
257 | fd_set input_fds; | |
258 | int num_fds = fdes + 1; | |
259 | int num_found; | |
260 | ||
261 | memset (&timeout, 0, sizeof (timeout)); | |
262 | FD_ZERO (&input_fds); | |
263 | FD_SET (fdes, &input_fds); | |
264 | ||
f0881b37 PA |
265 | num_found = interruptible_select (num_fds, |
266 | &input_fds, NULL, NULL, | |
267 | &timeout); | |
ed3ef339 DE |
268 | if (num_found < 0) |
269 | { | |
270 | /* Guile doesn't export SIGINT hooks like Python does. | |
271 | For now pass EINTR to scm_syserror, that's what fports.c does. */ | |
dda83cd7 | 272 | scm_syserror (FUNC_NAME); |
ed3ef339 DE |
273 | } |
274 | return num_found > 0 && FD_ISSET (fdes, &input_fds); | |
275 | } | |
276 | } | |
277 | ||
278 | /* The scm_t_ptob_descriptor.fill_input "method". */ | |
279 | ||
280 | static int | |
281 | ioscm_fill_input (SCM port) | |
282 | { | |
283 | /* Borrowed from libguile/fports.c. */ | |
284 | long count; | |
285 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
286 | ||
287 | /* If we're called on stdout,stderr, punt. */ | |
288 | if (! scm_is_eq (port, input_port_scm)) | |
289 | return (scm_t_wchar) EOF; /* Set errno and return -1? */ | |
290 | ||
291 | gdb_flush (gdb_stdout); | |
292 | gdb_flush (gdb_stderr); | |
293 | ||
da5bd37e | 294 | count = gdb_stdin->read ((char *) pt->read_buf, pt->read_buf_size); |
ed3ef339 DE |
295 | if (count == -1) |
296 | scm_syserror (FUNC_NAME); | |
297 | if (count == 0) | |
298 | return (scm_t_wchar) EOF; | |
299 | ||
300 | pt->read_pos = pt->read_buf; | |
301 | pt->read_end = pt->read_buf + count; | |
302 | return *pt->read_buf; | |
303 | } | |
304 | ||
ed3ef339 DE |
305 | /* Write to gdb's stdout or stderr. */ |
306 | ||
307 | static void | |
308 | ioscm_write (SCM port, const void *data, size_t size) | |
309 | { | |
ed3ef339 DE |
310 | |
311 | /* If we're called on stdin, punt. */ | |
312 | if (scm_is_eq (port, input_port_scm)) | |
313 | return; | |
314 | ||
680d7fd5 | 315 | gdbscm_gdb_exception exc {}; |
a70b8144 | 316 | try |
ed3ef339 DE |
317 | { |
318 | if (scm_is_eq (port, error_port_scm)) | |
9a3c8263 | 319 | fputsn_filtered ((const char *) data, size, gdb_stderr); |
ed3ef339 | 320 | else |
9a3c8263 | 321 | fputsn_filtered ((const char *) data, size, gdb_stdout); |
ed3ef339 | 322 | } |
230d2906 | 323 | catch (const gdb_exception &except) |
492d29ea | 324 | { |
680d7fd5 | 325 | exc = unpack (except); |
492d29ea | 326 | } |
680d7fd5 | 327 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
ed3ef339 DE |
328 | } |
329 | ||
330 | /* Flush gdb's stdout or stderr. */ | |
331 | ||
332 | static void | |
333 | ioscm_flush (SCM port) | |
334 | { | |
335 | /* If we're called on stdin, punt. */ | |
336 | if (scm_is_eq (port, input_port_scm)) | |
337 | return; | |
338 | ||
339 | if (scm_is_eq (port, error_port_scm)) | |
340 | gdb_flush (gdb_stderr); | |
341 | else | |
342 | gdb_flush (gdb_stdout); | |
343 | } | |
344 | ||
68cf161c LC |
345 | #else /* !USING_GUILE_BEFORE_2_2 */ |
346 | ||
347 | /* Read up to COUNT bytes into bytevector DST at offset START. Return the | |
348 | number of bytes read, zero for the end of file. */ | |
349 | ||
350 | static size_t | |
351 | ioscm_read_from_port (SCM port, SCM dst, size_t start, size_t count) | |
352 | { | |
353 | long read; | |
354 | char *read_buf; | |
355 | ||
356 | /* If we're called on stdout,stderr, punt. */ | |
357 | if (! scm_is_eq (port, input_port_scm)) | |
358 | return 0; | |
359 | ||
360 | gdb_flush (gdb_stdout); | |
361 | gdb_flush (gdb_stderr); | |
362 | ||
363 | read_buf = (char *) SCM_BYTEVECTOR_CONTENTS (dst) + start; | |
364 | read = gdb_stdin->read (read_buf, count); | |
365 | if (read == -1) | |
366 | scm_syserror (FUNC_NAME); | |
367 | ||
368 | return (size_t) read; | |
369 | } | |
370 | ||
371 | /* Write to gdb's stdout or stderr. */ | |
372 | ||
373 | static size_t | |
374 | ioscm_write (SCM port, SCM src, size_t start, size_t count) | |
375 | { | |
376 | const char *data = (char *) SCM_BYTEVECTOR_CONTENTS (src) + start; | |
377 | ||
378 | /* If we're called on stdin, punt. */ | |
379 | if (scm_is_eq (port, input_port_scm)) | |
380 | return 0; | |
381 | ||
382 | gdbscm_gdb_exception exc {}; | |
383 | try | |
384 | { | |
385 | if (scm_is_eq (port, error_port_scm)) | |
386 | fputsn_filtered ((const char *) data, count, gdb_stderr); | |
387 | else | |
388 | fputsn_filtered ((const char *) data, count, gdb_stdout); | |
389 | } | |
390 | catch (const gdb_exception &except) | |
391 | { | |
392 | exc = unpack (except); | |
393 | } | |
394 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); | |
395 | ||
396 | return count; | |
397 | } | |
398 | ||
399 | #endif /* !USING_GUILE_BEFORE_2_2 */ | |
400 | ||
ed3ef339 DE |
401 | /* Initialize the gdb stdio port type. |
402 | ||
403 | N.B. isatty? will fail on these ports, it is only supported for file | |
404 | ports. IWBN if we could "subclass" file ports. */ | |
405 | ||
406 | static void | |
407 | ioscm_init_gdb_stdio_port (void) | |
408 | { | |
409 | stdio_port_desc = scm_make_port_type (stdio_port_desc_name, | |
68cf161c LC |
410 | #if USING_GUILE_BEFORE_2_2 |
411 | ioscm_fill_input, | |
412 | #else | |
413 | ioscm_read_from_port, | |
414 | #endif | |
415 | ioscm_write); | |
ed3ef339 | 416 | |
68cf161c | 417 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
418 | scm_set_port_input_waiting (stdio_port_desc, ioscm_input_waiting); |
419 | scm_set_port_flush (stdio_port_desc, ioscm_flush); | |
68cf161c LC |
420 | #else |
421 | scm_set_port_read_wait_fd (stdio_port_desc, STDIN_FILENO); | |
422 | #endif | |
ed3ef339 DE |
423 | } |
424 | ||
68cf161c LC |
425 | #define GDB_STDIO_BUFFER_DEFAULT_SIZE 1024 |
426 | ||
427 | #if USING_GUILE_BEFORE_2_2 | |
428 | ||
ed3ef339 DE |
429 | /* Subroutine of ioscm_make_gdb_stdio_port to simplify it. |
430 | Set up the buffers of port PORT. | |
431 | MODE_BITS are the mode bits of PORT. */ | |
432 | ||
433 | static void | |
434 | ioscm_init_stdio_buffers (SCM port, long mode_bits) | |
435 | { | |
436 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
ed3ef339 DE |
437 | int size = mode_bits & SCM_BUF0 ? 0 : GDB_STDIO_BUFFER_DEFAULT_SIZE; |
438 | int writing = (mode_bits & SCM_WRTNG) != 0; | |
439 | ||
440 | /* This is heavily copied from scm_fport_buffer_add. */ | |
441 | ||
442 | if (!writing && size > 0) | |
443 | { | |
224c3ddb SM |
444 | pt->read_buf |
445 | = (unsigned char *) scm_gc_malloc_pointerless (size, "port buffer"); | |
ed3ef339 DE |
446 | pt->read_pos = pt->read_end = pt->read_buf; |
447 | pt->read_buf_size = size; | |
448 | } | |
449 | else | |
450 | { | |
451 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
452 | pt->read_buf_size = 1; | |
453 | } | |
454 | ||
455 | if (writing && size > 0) | |
456 | { | |
224c3ddb SM |
457 | pt->write_buf |
458 | = (unsigned char *) scm_gc_malloc_pointerless (size, "port buffer"); | |
ed3ef339 DE |
459 | pt->write_pos = pt->write_buf; |
460 | pt->write_buf_size = size; | |
461 | } | |
462 | else | |
463 | { | |
464 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
465 | pt->write_buf_size = 1; | |
466 | } | |
467 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
468 | } | |
469 | ||
68cf161c LC |
470 | #else |
471 | ||
472 | static void | |
473 | ioscm_init_stdio_buffers (SCM port, long mode_bits) | |
474 | { | |
475 | if (mode_bits & SCM_BUF0) | |
476 | scm_setvbuf (port, scm_from_utf8_symbol ("none"), scm_from_size_t (0)); | |
477 | else | |
478 | scm_setvbuf (port, scm_from_utf8_symbol ("block"), | |
479 | scm_from_size_t (GDB_STDIO_BUFFER_DEFAULT_SIZE)); | |
480 | } | |
481 | ||
482 | #endif | |
483 | ||
ed3ef339 DE |
484 | /* Create a gdb stdio port. */ |
485 | ||
486 | static SCM | |
487 | ioscm_make_gdb_stdio_port (int fd) | |
488 | { | |
1522597b | 489 | int is_a_tty = isatty (fd); |
ed3ef339 | 490 | const char *name; |
1522597b | 491 | const char *mode_str; |
ed3ef339 DE |
492 | long mode_bits; |
493 | SCM port; | |
494 | ||
495 | switch (fd) | |
496 | { | |
497 | case 0: | |
498 | name = input_port_name; | |
1522597b | 499 | mode_str = is_a_tty ? "r0" : "r"; |
ed3ef339 DE |
500 | break; |
501 | case 1: | |
502 | name = output_port_name; | |
1522597b | 503 | mode_str = is_a_tty ? "w0" : "w"; |
ed3ef339 DE |
504 | break; |
505 | case 2: | |
506 | name = error_port_name; | |
1522597b | 507 | mode_str = is_a_tty ? "w0" : "w"; |
ed3ef339 DE |
508 | break; |
509 | default: | |
510 | gdb_assert_not_reached ("bad stdio file descriptor"); | |
511 | } | |
512 | ||
1522597b | 513 | mode_bits = scm_mode_bits ((char *) mode_str); |
68cf161c | 514 | port = ioscm_open_port (stdio_port_desc, mode_bits, 0); |
ed3ef339 DE |
515 | |
516 | scm_set_port_filename_x (port, gdbscm_scm_from_c_string (name)); | |
517 | ||
518 | ioscm_init_stdio_buffers (port, mode_bits); | |
519 | ||
520 | return port; | |
521 | } | |
522 | ||
523 | /* (stdio-port? object) -> boolean */ | |
524 | ||
525 | static SCM | |
526 | gdbscm_stdio_port_p (SCM scm) | |
527 | { | |
68cf161c | 528 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
529 | /* This is copied from SCM_FPORTP. */ |
530 | return scm_from_bool (!SCM_IMP (scm) | |
531 | && (SCM_TYP16 (scm) == stdio_port_desc)); | |
68cf161c LC |
532 | #else |
533 | return scm_from_bool (SCM_PORTP (scm) | |
534 | && (SCM_PORT_TYPE (scm) == stdio_port_desc)); | |
535 | #endif | |
ed3ef339 DE |
536 | } |
537 | \f | |
538 | /* GDB's ports are accessed via functions to keep them read-only. */ | |
539 | ||
540 | /* (input-port) -> port */ | |
541 | ||
542 | static SCM | |
543 | gdbscm_input_port (void) | |
544 | { | |
545 | return input_port_scm; | |
546 | } | |
547 | ||
548 | /* (output-port) -> port */ | |
549 | ||
550 | static SCM | |
551 | gdbscm_output_port (void) | |
552 | { | |
553 | return output_port_scm; | |
554 | } | |
555 | ||
556 | /* (error-port) -> port */ | |
557 | ||
558 | static SCM | |
559 | gdbscm_error_port (void) | |
560 | { | |
561 | return error_port_scm; | |
562 | } | |
563 | \f | |
564 | /* Support for sending GDB I/O to Guile ports. */ | |
565 | ||
d7e74731 PA |
566 | ioscm_file_port::ioscm_file_port (SCM port) |
567 | : m_port (port) | |
568 | {} | |
ed3ef339 | 569 | |
d7e74731 PA |
570 | void |
571 | ioscm_file_port::flush () | |
ed3ef339 | 572 | { |
ed3ef339 DE |
573 | } |
574 | ||
d7e74731 PA |
575 | void |
576 | ioscm_file_port::write (const char *buffer, long length_buffer) | |
ed3ef339 | 577 | { |
d7e74731 | 578 | scm_c_write (m_port, buffer, length_buffer); |
ed3ef339 DE |
579 | } |
580 | ||
ed3ef339 DE |
581 | \f |
582 | /* Helper routine for with-{output,error}-to-port. */ | |
583 | ||
584 | static SCM | |
585 | ioscm_with_output_to_port_worker (SCM port, SCM thunk, enum oport oport, | |
586 | const char *func_name) | |
587 | { | |
ed3ef339 DE |
588 | SCM result; |
589 | ||
590 | SCM_ASSERT_TYPE (gdbscm_is_true (scm_output_port_p (port)), port, | |
591 | SCM_ARG1, func_name, _("output port")); | |
592 | SCM_ASSERT_TYPE (gdbscm_is_true (scm_thunk_p (thunk)), thunk, | |
593 | SCM_ARG2, func_name, _("thunk")); | |
594 | ||
b95de2b7 | 595 | set_batch_flag_and_restore_page_info save_page_info; |
ed3ef339 | 596 | |
156d9eab | 597 | scoped_restore restore_async = make_scoped_restore (¤t_ui->async, 0); |
ed3ef339 | 598 | |
d7e74731 | 599 | ui_file_up port_file (new ioscm_file_port (port)); |
ed3ef339 | 600 | |
97468094 TT |
601 | scoped_restore save_file = make_scoped_restore (oport == GDB_STDERR |
602 | ? &gdb_stderr : &gdb_stdout); | |
603 | ||
ca5909c7 TT |
604 | { |
605 | gdb::optional<ui_out_redirect_pop> redirect_popper; | |
606 | if (oport == GDB_STDERR) | |
607 | gdb_stderr = port_file.get (); | |
608 | else | |
609 | { | |
610 | current_uiout->redirect (port_file.get ()); | |
611 | redirect_popper.emplace (current_uiout); | |
ed3ef339 | 612 | |
ca5909c7 TT |
613 | gdb_stdout = port_file.get (); |
614 | } | |
ed3ef339 | 615 | |
ca5909c7 TT |
616 | result = gdbscm_safe_call_0 (thunk, NULL); |
617 | } | |
ed3ef339 | 618 | |
ed3ef339 DE |
619 | if (gdbscm_is_exception (result)) |
620 | gdbscm_throw (result); | |
621 | ||
622 | return result; | |
623 | } | |
624 | ||
625 | /* (%with-gdb-output-to-port port thunk) -> object | |
626 | This function is experimental. | |
627 | IWBN to not include "gdb" in the name, but it would collide with a standard | |
628 | procedure, and it's common to import the gdb module without a prefix. | |
629 | There are ways around this, but they're more cumbersome. | |
630 | ||
631 | This has % in the name because it's experimental, and we want the | |
632 | user-visible version to come from module (gdb experimental). */ | |
633 | ||
634 | static SCM | |
635 | gdbscm_percent_with_gdb_output_to_port (SCM port, SCM thunk) | |
636 | { | |
637 | return ioscm_with_output_to_port_worker (port, thunk, GDB_STDOUT, FUNC_NAME); | |
638 | } | |
639 | ||
640 | /* (%with-gdb-error-to-port port thunk) -> object | |
641 | This function is experimental. | |
642 | IWBN to not include "gdb" in the name, but it would collide with a standard | |
643 | procedure, and it's common to import the gdb module without a prefix. | |
644 | There are ways around this, but they're more cumbersome. | |
645 | ||
646 | This has % in the name because it's experimental, and we want the | |
647 | user-visible version to come from module (gdb experimental). */ | |
648 | ||
649 | static SCM | |
650 | gdbscm_percent_with_gdb_error_to_port (SCM port, SCM thunk) | |
651 | { | |
652 | return ioscm_with_output_to_port_worker (port, thunk, GDB_STDERR, FUNC_NAME); | |
653 | } | |
654 | \f | |
655 | /* Support for r/w memory via ports. */ | |
656 | ||
657 | /* Perform an "lseek" to OFFSET,WHENCE on memory port IOMEM. | |
658 | OFFSET must be in the range [0,size]. | |
659 | The result is non-zero for success, zero for failure. */ | |
660 | ||
661 | static int | |
662 | ioscm_lseek_address (ioscm_memory_port *iomem, LONGEST offset, int whence) | |
663 | { | |
664 | CORE_ADDR new_current; | |
665 | ||
666 | gdb_assert (iomem->current <= iomem->size); | |
667 | ||
668 | switch (whence) | |
669 | { | |
670 | case SEEK_CUR: | |
671 | /* Catch over/underflow. */ | |
672 | if ((offset < 0 && iomem->current + offset > iomem->current) | |
37442ce1 | 673 | || (offset > 0 && iomem->current + offset < iomem->current)) |
ed3ef339 DE |
674 | return 0; |
675 | new_current = iomem->current + offset; | |
676 | break; | |
677 | case SEEK_SET: | |
678 | new_current = offset; | |
679 | break; | |
680 | case SEEK_END: | |
681 | if (offset == 0) | |
682 | { | |
683 | new_current = iomem->size; | |
684 | break; | |
685 | } | |
686 | /* TODO: Not supported yet. */ | |
687 | return 0; | |
688 | default: | |
689 | return 0; | |
690 | } | |
691 | ||
692 | if (new_current > iomem->size) | |
693 | return 0; | |
694 | iomem->current = new_current; | |
695 | return 1; | |
696 | } | |
697 | ||
68cf161c LC |
698 | #if USING_GUILE_BEFORE_2_2 |
699 | ||
ed3ef339 DE |
700 | /* "fill_input" method for memory ports. */ |
701 | ||
702 | static int | |
703 | gdbscm_memory_port_fill_input (SCM port) | |
704 | { | |
705 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
706 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
707 | size_t to_read; | |
708 | ||
709 | /* "current" is the offset of the first byte we want to read. */ | |
37442ce1 DE |
710 | gdb_assert (iomem->current <= iomem->size); |
711 | if (iomem->current == iomem->size) | |
ed3ef339 DE |
712 | return EOF; |
713 | ||
714 | /* Don't read outside the allowed memory range. */ | |
715 | to_read = pt->read_buf_size; | |
716 | if (to_read > iomem->size - iomem->current) | |
717 | to_read = iomem->size - iomem->current; | |
718 | ||
719 | if (target_read_memory (iomem->start + iomem->current, pt->read_buf, | |
720 | to_read) != 0) | |
721 | gdbscm_memory_error (FUNC_NAME, _("error reading memory"), SCM_EOL); | |
722 | ||
37442ce1 | 723 | iomem->current += to_read; |
ed3ef339 DE |
724 | pt->read_pos = pt->read_buf; |
725 | pt->read_end = pt->read_buf + to_read; | |
ed3ef339 DE |
726 | return *pt->read_buf; |
727 | } | |
728 | ||
729 | /* "end_input" method for memory ports. | |
730 | Clear the read buffer and adjust the file position for unread bytes. */ | |
731 | ||
732 | static void | |
733 | gdbscm_memory_port_end_input (SCM port, int offset) | |
734 | { | |
735 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
736 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
737 | size_t remaining = pt->read_end - pt->read_pos; | |
738 | ||
739 | /* Note: Use of "int offset" is specified by Guile ports API. */ | |
740 | if ((offset < 0 && remaining + offset > remaining) | |
741 | || (offset > 0 && remaining + offset < remaining)) | |
742 | { | |
743 | gdbscm_out_of_range_error (FUNC_NAME, 0, scm_from_int (offset), | |
744 | _("overflow in offset calculation")); | |
745 | } | |
746 | offset += remaining; | |
747 | ||
748 | if (offset > 0) | |
749 | { | |
750 | pt->read_pos = pt->read_end; | |
751 | /* Throw error if unread-char used at beginning of file | |
752 | then attempting to write. Seems correct. */ | |
753 | if (!ioscm_lseek_address (iomem, -offset, SEEK_CUR)) | |
754 | { | |
755 | gdbscm_out_of_range_error (FUNC_NAME, 0, scm_from_int (offset), | |
756 | _("bad offset")); | |
757 | } | |
758 | } | |
759 | ||
760 | pt->rw_active = SCM_PORT_NEITHER; | |
761 | } | |
762 | ||
763 | /* "flush" method for memory ports. */ | |
764 | ||
765 | static void | |
766 | gdbscm_memory_port_flush (SCM port) | |
767 | { | |
768 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
769 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
770 | size_t to_write = pt->write_pos - pt->write_buf; | |
771 | ||
772 | if (to_write == 0) | |
773 | return; | |
774 | ||
775 | /* There's no way to indicate a short write, so if the request goes past | |
776 | the end of the port's memory range, flag an error. */ | |
777 | if (to_write > iomem->size - iomem->current) | |
778 | { | |
779 | gdbscm_out_of_range_error (FUNC_NAME, 0, | |
780 | gdbscm_scm_from_ulongest (to_write), | |
781 | _("writing beyond end of memory range")); | |
782 | } | |
783 | ||
784 | if (target_write_memory (iomem->start + iomem->current, pt->write_buf, | |
785 | to_write) != 0) | |
786 | gdbscm_memory_error (FUNC_NAME, _("error writing memory"), SCM_EOL); | |
787 | ||
788 | iomem->current += to_write; | |
789 | pt->write_pos = pt->write_buf; | |
790 | pt->rw_active = SCM_PORT_NEITHER; | |
791 | } | |
792 | ||
ed3ef339 DE |
793 | /* "seek" method for memory ports. */ |
794 | ||
795 | static scm_t_off | |
796 | gdbscm_memory_port_seek (SCM port, scm_t_off offset, int whence) | |
797 | { | |
798 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
799 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
800 | CORE_ADDR result; | |
801 | int rc; | |
802 | ||
803 | if (pt->rw_active == SCM_PORT_WRITE) | |
804 | { | |
805 | if (offset != 0 || whence != SEEK_CUR) | |
806 | { | |
807 | gdbscm_memory_port_flush (port); | |
808 | rc = ioscm_lseek_address (iomem, offset, whence); | |
809 | result = iomem->current; | |
810 | } | |
811 | else | |
812 | { | |
813 | /* Read current position without disturbing the buffer, | |
814 | but flag an error if what's in the buffer goes outside the | |
815 | allowed range. */ | |
816 | CORE_ADDR current = iomem->current; | |
817 | size_t delta = pt->write_pos - pt->write_buf; | |
818 | ||
819 | if (current + delta < current | |
37442ce1 | 820 | || current + delta > iomem->size) |
ed3ef339 DE |
821 | rc = 0; |
822 | else | |
823 | { | |
824 | result = current + delta; | |
825 | rc = 1; | |
826 | } | |
827 | } | |
828 | } | |
829 | else if (pt->rw_active == SCM_PORT_READ) | |
830 | { | |
831 | if (offset != 0 || whence != SEEK_CUR) | |
832 | { | |
833 | scm_end_input (port); | |
834 | rc = ioscm_lseek_address (iomem, offset, whence); | |
835 | result = iomem->current; | |
836 | } | |
837 | else | |
838 | { | |
839 | /* Read current position without disturbing the buffer | |
840 | (particularly the unread-char buffer). */ | |
841 | CORE_ADDR current = iomem->current; | |
842 | size_t remaining = pt->read_end - pt->read_pos; | |
843 | ||
844 | if (current - remaining > current | |
845 | || current - remaining < iomem->start) | |
846 | rc = 0; | |
847 | else | |
848 | { | |
849 | result = current - remaining; | |
850 | rc = 1; | |
851 | } | |
852 | ||
853 | if (rc != 0 && pt->read_buf == pt->putback_buf) | |
854 | { | |
855 | size_t saved_remaining = pt->saved_read_end - pt->saved_read_pos; | |
856 | ||
857 | if (result - saved_remaining > result | |
858 | || result - saved_remaining < iomem->start) | |
859 | rc = 0; | |
860 | else | |
861 | result -= saved_remaining; | |
862 | } | |
863 | } | |
864 | } | |
865 | else /* SCM_PORT_NEITHER */ | |
866 | { | |
867 | rc = ioscm_lseek_address (iomem, offset, whence); | |
868 | result = iomem->current; | |
869 | } | |
870 | ||
871 | if (rc == 0) | |
872 | { | |
873 | gdbscm_out_of_range_error (FUNC_NAME, 0, | |
874 | gdbscm_scm_from_longest (offset), | |
875 | _("bad seek")); | |
876 | } | |
877 | ||
878 | /* TODO: The Guile API doesn't support 32x64. We can't fix that here, | |
879 | and there's no need to throw an error if the new address can't be | |
880 | represented in a scm_t_off. But we could return something less | |
881 | clumsy. */ | |
882 | return result; | |
883 | } | |
884 | ||
68cf161c LC |
885 | /* "write" method for memory ports. */ |
886 | ||
887 | static void | |
888 | gdbscm_memory_port_write (SCM port, const void *void_data, size_t size) | |
889 | { | |
890 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
891 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
892 | const gdb_byte *data = (const gdb_byte *) void_data; | |
893 | ||
894 | /* There's no way to indicate a short write, so if the request goes past | |
895 | the end of the port's memory range, flag an error. */ | |
896 | if (size > iomem->size - iomem->current) | |
897 | { | |
898 | gdbscm_out_of_range_error (FUNC_NAME, 0, gdbscm_scm_from_ulongest (size), | |
899 | _("writing beyond end of memory range")); | |
900 | } | |
901 | ||
902 | if (pt->write_buf == &pt->shortbuf) | |
903 | { | |
904 | /* Unbuffered port. */ | |
905 | if (target_write_memory (iomem->start + iomem->current, data, size) != 0) | |
906 | gdbscm_memory_error (FUNC_NAME, _("error writing memory"), SCM_EOL); | |
907 | iomem->current += size; | |
908 | return; | |
909 | } | |
910 | ||
911 | /* Note: The edge case of what to do when the buffer exactly fills is | |
912 | debatable. Guile flushes when the buffer exactly fills up, so we | |
913 | do too. It's counter-intuitive to my mind, but in case there's a | |
914 | subtlety somewhere that depends on this, we do the same. */ | |
915 | ||
916 | { | |
917 | size_t space = pt->write_end - pt->write_pos; | |
918 | ||
919 | if (size < space) | |
920 | { | |
921 | /* Data fits in buffer, and does not fill it. */ | |
922 | memcpy (pt->write_pos, data, size); | |
923 | pt->write_pos += size; | |
924 | } | |
925 | else | |
926 | { | |
927 | memcpy (pt->write_pos, data, space); | |
928 | pt->write_pos = pt->write_end; | |
929 | gdbscm_memory_port_flush (port); | |
930 | { | |
931 | const gdb_byte *ptr = data + space; | |
932 | size_t remaining = size - space; | |
933 | ||
934 | if (remaining >= pt->write_buf_size) | |
935 | { | |
936 | if (target_write_memory (iomem->start + iomem->current, ptr, | |
937 | remaining) != 0) | |
938 | gdbscm_memory_error (FUNC_NAME, _("error writing memory"), | |
939 | SCM_EOL); | |
940 | iomem->current += remaining; | |
941 | } | |
942 | else | |
943 | { | |
944 | memcpy (pt->write_pos, ptr, remaining); | |
945 | pt->write_pos += remaining; | |
946 | } | |
947 | } | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
ed3ef339 DE |
952 | /* "close" method for memory ports. */ |
953 | ||
954 | static int | |
955 | gdbscm_memory_port_close (SCM port) | |
956 | { | |
957 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
958 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
959 | ||
960 | gdbscm_memory_port_flush (port); | |
961 | ||
962 | if (pt->read_buf == pt->putback_buf) | |
963 | pt->read_buf = pt->saved_read_buf; | |
37442ce1 DE |
964 | if (pt->read_buf != &pt->shortbuf) |
965 | xfree (pt->read_buf); | |
966 | if (pt->write_buf != &pt->shortbuf) | |
967 | xfree (pt->write_buf); | |
ed3ef339 DE |
968 | scm_gc_free (iomem, sizeof (*iomem), "memory port"); |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
973 | /* "free" method for memory ports. */ | |
974 | ||
975 | static size_t | |
976 | gdbscm_memory_port_free (SCM port) | |
977 | { | |
978 | gdbscm_memory_port_close (port); | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
68cf161c LC |
983 | /* Re-initialize a memory port, updating its read/write buffer sizes. |
984 | An exception is thrown if the port is unbuffered. | |
985 | TODO: Allow switching buffered/unbuffered. | |
986 | An exception is also thrown if data is still buffered, except in the case | |
987 | where the buffer size isn't changing (since that's just a nop). */ | |
988 | ||
989 | static void | |
990 | ioscm_reinit_memory_port (SCM port, size_t read_buf_size, | |
991 | size_t write_buf_size, const char *func_name) | |
992 | { | |
993 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
994 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
995 | ||
996 | gdb_assert (read_buf_size >= min_memory_port_buf_size | |
997 | && read_buf_size <= max_memory_port_buf_size); | |
998 | gdb_assert (write_buf_size >= min_memory_port_buf_size | |
999 | && write_buf_size <= max_memory_port_buf_size); | |
1000 | ||
1001 | /* First check if the port is unbuffered. */ | |
1002 | ||
1003 | if (pt->read_buf == &pt->shortbuf) | |
1004 | { | |
1005 | gdb_assert (pt->write_buf == &pt->shortbuf); | |
1006 | scm_misc_error (func_name, _("port is unbuffered: ~a"), | |
1007 | scm_list_1 (port)); | |
1008 | } | |
1009 | ||
1010 | /* Next check if anything is buffered. */ | |
1011 | ||
1012 | if (read_buf_size != pt->read_buf_size | |
1013 | && pt->read_end != pt->read_buf) | |
1014 | { | |
1015 | scm_misc_error (func_name, _("read buffer not empty: ~a"), | |
1016 | scm_list_1 (port)); | |
1017 | } | |
1018 | ||
1019 | if (write_buf_size != pt->write_buf_size | |
1020 | && pt->write_pos != pt->write_buf) | |
1021 | { | |
1022 | scm_misc_error (func_name, _("write buffer not empty: ~a"), | |
1023 | scm_list_1 (port)); | |
1024 | } | |
1025 | ||
1026 | /* Now we can update the buffer sizes, but only if the size has changed. */ | |
1027 | ||
1028 | if (read_buf_size != pt->read_buf_size) | |
1029 | { | |
1030 | iomem->read_buf_size = read_buf_size; | |
1031 | pt->read_buf_size = read_buf_size; | |
1032 | xfree (pt->read_buf); | |
1033 | pt->read_buf = (unsigned char *) xmalloc (pt->read_buf_size); | |
1034 | pt->read_pos = pt->read_end = pt->read_buf; | |
1035 | } | |
1036 | ||
1037 | if (write_buf_size != pt->write_buf_size) | |
1038 | { | |
1039 | iomem->write_buf_size = write_buf_size; | |
1040 | pt->write_buf_size = write_buf_size; | |
1041 | xfree (pt->write_buf); | |
1042 | pt->write_buf = (unsigned char *) xmalloc (pt->write_buf_size); | |
1043 | pt->write_pos = pt->write_buf; | |
1044 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | #else /* !USING_GUILE_BEFORE_2_2 */ | |
1049 | ||
1050 | /* The semantics get weird if the buffer size is larger than the port range, | |
1051 | so provide a better default buffer size. */ | |
1052 | ||
1053 | static void | |
1054 | gdbscm_get_natural_buffer_sizes (SCM port, size_t *read_size, | |
1055 | size_t *write_size) | |
1056 | { | |
1057 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1058 | ||
1059 | size_t size = natural_buf_size; | |
1060 | if (iomem != NULL && iomem->size < size) | |
1061 | size = iomem->size; | |
1062 | *read_size = *write_size = size; | |
1063 | } | |
1064 | ||
1065 | /* Read up to COUNT bytes into bytevector DST at offset START. Return the | |
1066 | number of bytes read, zero for the end of file. */ | |
1067 | ||
1068 | static size_t | |
1069 | gdbscm_memory_port_read (SCM port, SCM dst, size_t start, size_t count) | |
1070 | { | |
1071 | gdb_byte *read_buf; | |
1072 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1073 | ||
1074 | /* "current" is the offset of the first byte we want to read. */ | |
1075 | gdb_assert (iomem->current <= iomem->size); | |
1076 | if (iomem->current == iomem->size) | |
1077 | return 0; | |
1078 | ||
1079 | /* Don't read outside the allowed memory range. */ | |
1080 | if (count > iomem->size - iomem->current) | |
1081 | count = iomem->size - iomem->current; | |
1082 | ||
1083 | read_buf = (gdb_byte *) SCM_BYTEVECTOR_CONTENTS (dst) + start; | |
1084 | if (target_read_memory (iomem->start + iomem->current, read_buf, | |
1085 | count) != 0) | |
1086 | gdbscm_memory_error (FUNC_NAME, _("error reading memory"), SCM_EOL); | |
1087 | ||
1088 | iomem->current += count; | |
1089 | return count; | |
1090 | } | |
1091 | ||
1092 | static size_t | |
1093 | gdbscm_memory_port_write (SCM port, SCM src, size_t start, size_t count) | |
1094 | { | |
1095 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1096 | const gdb_byte *data = | |
1097 | (const gdb_byte *) SCM_BYTEVECTOR_CONTENTS (src) + start; | |
1098 | ||
1099 | /* If the request goes past the end of the port's memory range, flag an | |
1100 | error. */ | |
1101 | if (count > iomem->size - iomem->current) | |
1102 | gdbscm_out_of_range_error (FUNC_NAME, 0, scm_from_size_t (count), | |
1103 | _("writing beyond end of memory range")); | |
1104 | ||
1105 | if (target_write_memory (iomem->start + iomem->current, data, | |
1106 | count) != 0) | |
1107 | gdbscm_memory_error (FUNC_NAME, _("error writing memory"), | |
1108 | SCM_EOL); | |
1109 | ||
1110 | iomem->current += count; | |
1111 | ||
1112 | return count; | |
1113 | } | |
1114 | ||
1115 | static scm_t_off | |
1116 | gdbscm_memory_port_seek (SCM port, scm_t_off offset, int whence) | |
1117 | { | |
1118 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1119 | int rc; | |
1120 | ||
1121 | rc = ioscm_lseek_address (iomem, offset, whence); | |
1122 | if (rc == 0) | |
1123 | gdbscm_out_of_range_error (FUNC_NAME, 0, | |
1124 | gdbscm_scm_from_longest (offset), | |
1125 | _("bad seek")); | |
1126 | ||
1127 | /* TODO: The Guile API doesn't support 32x64. We can't fix that here, | |
1128 | and there's no need to throw an error if the new address can't be | |
1129 | represented in a scm_t_off. But we could return something less | |
1130 | clumsy. */ | |
1131 | return iomem->current; | |
1132 | } | |
1133 | ||
1134 | static void | |
1135 | gdbscm_memory_port_close (SCM port) | |
1136 | { | |
1137 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1138 | scm_gc_free (iomem, sizeof (*iomem), "memory port"); | |
1139 | SCM_SETSTREAM (port, NULL); | |
1140 | } | |
1141 | ||
1142 | #endif /* !USING_GUILE_BEFORE_2_2 */ | |
1143 | ||
ed3ef339 DE |
1144 | /* "print" method for memory ports. */ |
1145 | ||
1146 | static int | |
1147 | gdbscm_memory_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
1148 | { | |
1149 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (exp); | |
ed3ef339 DE |
1150 | |
1151 | scm_puts ("#<", port); | |
1152 | scm_print_port_mode (exp, port); | |
1153 | /* scm_print_port_mode includes a trailing space. */ | |
68cf161c | 1154 | gdbscm_printf (port, "%s %s-%s", memory_port_desc_name, |
ed3ef339 DE |
1155 | hex_string (iomem->start), hex_string (iomem->end)); |
1156 | scm_putc ('>', port); | |
1157 | return 1; | |
1158 | } | |
1159 | ||
1160 | /* Create the port type used for memory. */ | |
1161 | ||
1162 | static void | |
1163 | ioscm_init_memory_port_type (void) | |
1164 | { | |
1165 | memory_port_desc = scm_make_port_type (memory_port_desc_name, | |
68cf161c | 1166 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 | 1167 | gdbscm_memory_port_fill_input, |
68cf161c LC |
1168 | #else |
1169 | gdbscm_memory_port_read, | |
1170 | #endif | |
ed3ef339 DE |
1171 | gdbscm_memory_port_write); |
1172 | ||
68cf161c | 1173 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1174 | scm_set_port_end_input (memory_port_desc, gdbscm_memory_port_end_input); |
1175 | scm_set_port_flush (memory_port_desc, gdbscm_memory_port_flush); | |
68cf161c LC |
1176 | scm_set_port_free (memory_port_desc, gdbscm_memory_port_free); |
1177 | #else | |
1178 | scm_set_port_get_natural_buffer_sizes (memory_port_desc, | |
1179 | gdbscm_get_natural_buffer_sizes); | |
1180 | #endif | |
ed3ef339 DE |
1181 | scm_set_port_seek (memory_port_desc, gdbscm_memory_port_seek); |
1182 | scm_set_port_close (memory_port_desc, gdbscm_memory_port_close); | |
ed3ef339 DE |
1183 | scm_set_port_print (memory_port_desc, gdbscm_memory_port_print); |
1184 | } | |
1185 | ||
1186 | /* Helper for gdbscm_open_memory to parse the mode bits. | |
1187 | An exception is thrown if MODE is invalid. */ | |
1188 | ||
1189 | static long | |
1190 | ioscm_parse_mode_bits (const char *func_name, const char *mode) | |
1191 | { | |
1192 | const char *p; | |
1193 | long mode_bits; | |
1194 | ||
1195 | if (*mode != 'r' && *mode != 'w') | |
1196 | { | |
1197 | gdbscm_out_of_range_error (func_name, 0, | |
1198 | gdbscm_scm_from_c_string (mode), | |
1199 | _("bad mode string")); | |
1200 | } | |
1201 | for (p = mode + 1; *p != '\0'; ++p) | |
1202 | { | |
1203 | switch (*p) | |
1204 | { | |
37442ce1 | 1205 | case '0': |
ed3ef339 DE |
1206 | case 'b': |
1207 | case '+': | |
1208 | break; | |
1209 | default: | |
1210 | gdbscm_out_of_range_error (func_name, 0, | |
1211 | gdbscm_scm_from_c_string (mode), | |
1212 | _("bad mode string")); | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /* Kinda awkward to convert the mode from SCM -> string only to have Guile | |
1217 | convert it back to SCM, but that's the API we have to work with. */ | |
1218 | mode_bits = scm_mode_bits ((char *) mode); | |
1219 | ||
1220 | return mode_bits; | |
1221 | } | |
1222 | ||
68cf161c LC |
1223 | /* Return the memory object to be used as a "stream" associated with a memory |
1224 | port for the START--END range. */ | |
ed3ef339 | 1225 | |
68cf161c LC |
1226 | static ioscm_memory_port * |
1227 | ioscm_init_memory_port_stream (CORE_ADDR start, CORE_ADDR end) | |
ed3ef339 | 1228 | { |
ed3ef339 DE |
1229 | ioscm_memory_port *iomem; |
1230 | ||
1231 | gdb_assert (start <= end); | |
ed3ef339 DE |
1232 | |
1233 | iomem = (ioscm_memory_port *) scm_gc_malloc_pointerless (sizeof (*iomem), | |
1234 | "memory port"); | |
1235 | ||
1236 | iomem->start = start; | |
1237 | iomem->end = end; | |
37442ce1 | 1238 | iomem->size = end - start; |
ed3ef339 | 1239 | iomem->current = 0; |
68cf161c LC |
1240 | |
1241 | return iomem; | |
1242 | } | |
1243 | ||
1244 | #if USING_GUILE_BEFORE_2_2 | |
1245 | ||
1246 | /* Helper for gdbscm_open_memory to finish initializing the port. | |
1247 | The port has address range [start,end). | |
1248 | This means that address of 0xff..ff is not accessible. | |
1249 | I can live with that. */ | |
1250 | ||
1251 | static void | |
1252 | ioscm_init_memory_port_buffers (SCM port) | |
1253 | { | |
1254 | ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1255 | ||
1256 | int buffered = (SCM_CELL_WORD_0 (port) & SCM_BUF0) == 0; | |
37442ce1 DE |
1257 | if (buffered) |
1258 | { | |
1259 | iomem->read_buf_size = default_read_buf_size; | |
1260 | iomem->write_buf_size = default_write_buf_size; | |
1261 | } | |
1262 | else | |
1263 | { | |
1264 | iomem->read_buf_size = 1; | |
1265 | iomem->write_buf_size = 1; | |
1266 | } | |
ed3ef339 | 1267 | |
68cf161c | 1268 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ed3ef339 DE |
1269 | /* Match the expectation of `binary-port?'. */ |
1270 | pt->encoding = NULL; | |
1271 | pt->rw_random = 1; | |
1272 | pt->read_buf_size = iomem->read_buf_size; | |
ed3ef339 | 1273 | pt->write_buf_size = iomem->write_buf_size; |
37442ce1 DE |
1274 | if (buffered) |
1275 | { | |
224c3ddb SM |
1276 | pt->read_buf = (unsigned char *) xmalloc (pt->read_buf_size); |
1277 | pt->write_buf = (unsigned char *) xmalloc (pt->write_buf_size); | |
37442ce1 DE |
1278 | } |
1279 | else | |
1280 | { | |
1281 | pt->read_buf = &pt->shortbuf; | |
1282 | pt->write_buf = &pt->shortbuf; | |
1283 | } | |
1284 | pt->read_pos = pt->read_end = pt->read_buf; | |
ed3ef339 DE |
1285 | pt->write_pos = pt->write_buf; |
1286 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
ed3ef339 DE |
1287 | } |
1288 | ||
68cf161c | 1289 | #endif |
ed3ef339 DE |
1290 | |
1291 | /* (open-memory [#:mode string] [#:start address] [#:size integer]) -> port | |
1292 | Return a port that can be used for reading and writing memory. | |
1293 | MODE is a string, and must be one of "r", "w", or "r+". | |
37442ce1 DE |
1294 | "0" may be appended to MODE to mark the port as unbuffered. |
1295 | For compatibility "b" (binary) may also be appended, but we ignore it: | |
ed3ef339 DE |
1296 | memory ports are binary only. |
1297 | ||
ed3ef339 | 1298 | The chunk of memory that can be accessed can be bounded. |
37442ce1 DE |
1299 | If both START,SIZE are unspecified, all of memory can be accessed |
1300 | (except 0xff..ff). If only START is specified, all of memory from that | |
1301 | point on can be accessed (except 0xff..ff). If only SIZE if specified, | |
1302 | all memory in [0,SIZE) can be accessed. If both are specified, all memory | |
1303 | in [START,START+SIZE) can be accessed. | |
ed3ef339 DE |
1304 | |
1305 | Note: If it becomes useful enough we can later add #:end as an alternative | |
1306 | to #:size. For now it is left out. | |
1307 | ||
1308 | The result is a Scheme port, and its semantics are a bit odd for accessing | |
1309 | memory (e.g., unget), but we don't try to hide this. It's a port. | |
1310 | ||
37442ce1 | 1311 | N.B. Seeks on the port must be in the range [0,size]. |
ed3ef339 DE |
1312 | This is for similarity with bytevector ports, and so that one can seek |
1313 | to the first byte. */ | |
1314 | ||
1315 | static SCM | |
1316 | gdbscm_open_memory (SCM rest) | |
1317 | { | |
1318 | const SCM keywords[] = { | |
1319 | mode_keyword, start_keyword, size_keyword, SCM_BOOL_F | |
1320 | }; | |
1321 | char *mode = NULL; | |
1322 | CORE_ADDR start = 0; | |
1323 | CORE_ADDR end; | |
1324 | int mode_arg_pos = -1, start_arg_pos = -1, size_arg_pos = -1; | |
1325 | ULONGEST size; | |
1326 | SCM port; | |
1327 | long mode_bits; | |
1328 | ||
1329 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "#sUU", rest, | |
1330 | &mode_arg_pos, &mode, | |
1331 | &start_arg_pos, &start, | |
1332 | &size_arg_pos, &size); | |
1333 | ||
c6486df5 | 1334 | scm_dynwind_begin ((scm_t_dynwind_flags) 0); |
ed3ef339 DE |
1335 | |
1336 | if (mode == NULL) | |
1337 | mode = xstrdup ("r"); | |
1338 | scm_dynwind_free (mode); | |
1339 | ||
ed3ef339 DE |
1340 | if (size_arg_pos > 0) |
1341 | { | |
ed3ef339 DE |
1342 | /* For now be strict about start+size overflowing. If it becomes |
1343 | a nuisance we can relax things later. */ | |
1344 | if (start + size < start) | |
1345 | { | |
1346 | gdbscm_out_of_range_error (FUNC_NAME, 0, | |
1347 | scm_list_2 (gdbscm_scm_from_ulongest (start), | |
1348 | gdbscm_scm_from_ulongest (size)), | |
1349 | _("start+size overflows")); | |
1350 | } | |
37442ce1 | 1351 | end = start + size; |
ed3ef339 DE |
1352 | } |
1353 | else | |
37442ce1 | 1354 | end = ~(CORE_ADDR) 0; |
ed3ef339 DE |
1355 | |
1356 | mode_bits = ioscm_parse_mode_bits (FUNC_NAME, mode); | |
1357 | ||
68cf161c LC |
1358 | /* Edge case: empty range -> unbuffered. |
1359 | There's no need to disallow empty ranges, but we need an unbuffered port | |
1360 | to get the semantics right. */ | |
1361 | if (size == 0) | |
1362 | mode_bits |= SCM_BUF0; | |
1363 | ||
1364 | auto stream = ioscm_init_memory_port_stream (start, end); | |
1365 | port = ioscm_open_port (memory_port_desc, mode_bits, | |
1366 | (scm_t_bits) stream); | |
ed3ef339 | 1367 | |
68cf161c LC |
1368 | #if USING_GUILE_BEFORE_2_2 |
1369 | ioscm_init_memory_port_buffers (port); | |
1370 | #endif | |
ed3ef339 DE |
1371 | |
1372 | scm_dynwind_end (); | |
1373 | ||
1374 | /* TODO: Set the file name as "memory-start-end"? */ | |
1375 | return port; | |
1376 | } | |
1377 | ||
1378 | /* Return non-zero if OBJ is a memory port. */ | |
1379 | ||
1380 | static int | |
1381 | gdbscm_is_memory_port (SCM obj) | |
1382 | { | |
68cf161c | 1383 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 | 1384 | return !SCM_IMP (obj) && (SCM_TYP16 (obj) == memory_port_desc); |
68cf161c LC |
1385 | #else |
1386 | return SCM_PORTP (obj) && (SCM_PORT_TYPE (obj) == memory_port_desc); | |
1387 | #endif | |
ed3ef339 DE |
1388 | } |
1389 | ||
1390 | /* (memory-port? obj) -> boolean */ | |
1391 | ||
1392 | static SCM | |
1393 | gdbscm_memory_port_p (SCM obj) | |
1394 | { | |
1395 | return scm_from_bool (gdbscm_is_memory_port (obj)); | |
1396 | } | |
1397 | ||
1398 | /* (memory-port-range port) -> (start end) */ | |
1399 | ||
1400 | static SCM | |
1401 | gdbscm_memory_port_range (SCM port) | |
1402 | { | |
1403 | ioscm_memory_port *iomem; | |
1404 | ||
1405 | SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME, | |
1406 | memory_port_desc_name); | |
1407 | ||
1408 | iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1409 | return scm_list_2 (gdbscm_scm_from_ulongest (iomem->start), | |
1410 | gdbscm_scm_from_ulongest (iomem->end)); | |
1411 | } | |
1412 | ||
1413 | /* (memory-port-read-buffer-size port) -> integer */ | |
1414 | ||
1415 | static SCM | |
1416 | gdbscm_memory_port_read_buffer_size (SCM port) | |
1417 | { | |
68cf161c | 1418 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1419 | ioscm_memory_port *iomem; |
1420 | ||
1421 | SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME, | |
1422 | memory_port_desc_name); | |
1423 | ||
1424 | iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1425 | return scm_from_uint (iomem->read_buf_size); | |
68cf161c LC |
1426 | #else |
1427 | return scm_from_uint (0); | |
1428 | #endif | |
ed3ef339 DE |
1429 | } |
1430 | ||
1431 | /* (set-memory-port-read-buffer-size! port size) -> unspecified | |
37442ce1 DE |
1432 | An exception is thrown if read data is still buffered or if the port |
1433 | is unbuffered. */ | |
ed3ef339 DE |
1434 | |
1435 | static SCM | |
1436 | gdbscm_set_memory_port_read_buffer_size_x (SCM port, SCM size) | |
1437 | { | |
68cf161c | 1438 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1439 | ioscm_memory_port *iomem; |
1440 | ||
1441 | SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME, | |
1442 | memory_port_desc_name); | |
1443 | SCM_ASSERT_TYPE (scm_is_integer (size), size, SCM_ARG2, FUNC_NAME, | |
1444 | _("integer")); | |
1445 | ||
1446 | if (!scm_is_unsigned_integer (size, min_memory_port_buf_size, | |
1447 | max_memory_port_buf_size)) | |
1448 | { | |
1449 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, size, | |
1450 | out_of_range_buf_size); | |
1451 | } | |
1452 | ||
1453 | iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1454 | ioscm_reinit_memory_port (port, scm_to_uint (size), iomem->write_buf_size, | |
1455 | FUNC_NAME); | |
1456 | ||
1457 | return SCM_UNSPECIFIED; | |
68cf161c LC |
1458 | #else |
1459 | return scm_setvbuf (port, scm_from_utf8_symbol ("block"), size); | |
1460 | #endif | |
ed3ef339 DE |
1461 | } |
1462 | ||
1463 | /* (memory-port-write-buffer-size port) -> integer */ | |
1464 | ||
1465 | static SCM | |
1466 | gdbscm_memory_port_write_buffer_size (SCM port) | |
1467 | { | |
68cf161c | 1468 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1469 | ioscm_memory_port *iomem; |
1470 | ||
1471 | SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME, | |
1472 | memory_port_desc_name); | |
1473 | ||
1474 | iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1475 | return scm_from_uint (iomem->write_buf_size); | |
68cf161c LC |
1476 | #else |
1477 | return scm_from_uint (0); | |
1478 | #endif | |
ed3ef339 DE |
1479 | } |
1480 | ||
1481 | /* (set-memory-port-write-buffer-size! port size) -> unspecified | |
37442ce1 DE |
1482 | An exception is thrown if write data is still buffered or if the port |
1483 | is unbuffered. */ | |
ed3ef339 DE |
1484 | |
1485 | static SCM | |
1486 | gdbscm_set_memory_port_write_buffer_size_x (SCM port, SCM size) | |
1487 | { | |
68cf161c | 1488 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1489 | ioscm_memory_port *iomem; |
1490 | ||
1491 | SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME, | |
1492 | memory_port_desc_name); | |
1493 | SCM_ASSERT_TYPE (scm_is_integer (size), size, SCM_ARG2, FUNC_NAME, | |
1494 | _("integer")); | |
1495 | ||
1496 | if (!scm_is_unsigned_integer (size, min_memory_port_buf_size, | |
1497 | max_memory_port_buf_size)) | |
1498 | { | |
1499 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, size, | |
1500 | out_of_range_buf_size); | |
1501 | } | |
1502 | ||
1503 | iomem = (ioscm_memory_port *) SCM_STREAM (port); | |
1504 | ioscm_reinit_memory_port (port, iomem->read_buf_size, scm_to_uint (size), | |
1505 | FUNC_NAME); | |
1506 | ||
1507 | return SCM_UNSPECIFIED; | |
68cf161c LC |
1508 | #else |
1509 | return scm_setvbuf (port, scm_from_utf8_symbol ("block"), size); | |
1510 | #endif | |
ed3ef339 DE |
1511 | } |
1512 | \f | |
1513 | /* Initialize gdb ports. */ | |
1514 | ||
1515 | static const scheme_function port_functions[] = | |
1516 | { | |
72e02483 | 1517 | { "input-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_input_port), |
ed3ef339 DE |
1518 | "\ |
1519 | Return gdb's input port." }, | |
1520 | ||
72e02483 | 1521 | { "output-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_output_port), |
ed3ef339 DE |
1522 | "\ |
1523 | Return gdb's output port." }, | |
1524 | ||
72e02483 | 1525 | { "error-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_error_port), |
ed3ef339 DE |
1526 | "\ |
1527 | Return gdb's error port." }, | |
1528 | ||
72e02483 | 1529 | { "stdio-port?", 1, 0, 0, as_a_scm_t_subr (gdbscm_stdio_port_p), |
ed3ef339 DE |
1530 | "\ |
1531 | Return #t if the object is a gdb:stdio-port." }, | |
1532 | ||
72e02483 | 1533 | { "open-memory", 0, 0, 1, as_a_scm_t_subr (gdbscm_open_memory), |
ed3ef339 DE |
1534 | "\ |
1535 | Return a port that can be used for reading/writing inferior memory.\n\ | |
1536 | \n\ | |
1537 | Arguments: [#:mode string] [#:start address] [#:size integer]\n\ | |
1538 | Returns: A port object." }, | |
1539 | ||
72e02483 | 1540 | { "memory-port?", 1, 0, 0, as_a_scm_t_subr (gdbscm_memory_port_p), |
ed3ef339 DE |
1541 | "\ |
1542 | Return #t if the object is a memory port." }, | |
1543 | ||
72e02483 | 1544 | { "memory-port-range", 1, 0, 0, as_a_scm_t_subr (gdbscm_memory_port_range), |
ed3ef339 DE |
1545 | "\ |
1546 | Return the memory range of the port as (start end)." }, | |
1547 | ||
1548 | { "memory-port-read-buffer-size", 1, 0, 0, | |
72e02483 | 1549 | as_a_scm_t_subr (gdbscm_memory_port_read_buffer_size), |
ed3ef339 DE |
1550 | "\ |
1551 | Return the size of the read buffer for the memory port." }, | |
1552 | ||
1553 | { "set-memory-port-read-buffer-size!", 2, 0, 0, | |
72e02483 | 1554 | as_a_scm_t_subr (gdbscm_set_memory_port_read_buffer_size_x), |
ed3ef339 DE |
1555 | "\ |
1556 | Set the size of the read buffer for the memory port.\n\ | |
1557 | \n\ | |
1558 | Arguments: port integer\n\ | |
1559 | Returns: unspecified." }, | |
1560 | ||
1561 | { "memory-port-write-buffer-size", 1, 0, 0, | |
72e02483 | 1562 | as_a_scm_t_subr (gdbscm_memory_port_write_buffer_size), |
ed3ef339 DE |
1563 | "\ |
1564 | Return the size of the write buffer for the memory port." }, | |
1565 | ||
1566 | { "set-memory-port-write-buffer-size!", 2, 0, 0, | |
72e02483 | 1567 | as_a_scm_t_subr (gdbscm_set_memory_port_write_buffer_size_x), |
ed3ef339 DE |
1568 | "\ |
1569 | Set the size of the write buffer for the memory port.\n\ | |
1570 | \n\ | |
1571 | Arguments: port integer\n\ | |
1572 | Returns: unspecified." }, | |
1573 | ||
1574 | END_FUNCTIONS | |
1575 | }; | |
1576 | ||
1577 | static const scheme_function private_port_functions[] = | |
1578 | { | |
1579 | #if 0 /* TODO */ | |
1580 | { "%with-gdb-input-from-port", 2, 0, 0, | |
72e02483 | 1581 | as_a_scm_t_subr (gdbscm_percent_with_gdb_input_from_port), |
ed3ef339 DE |
1582 | "\ |
1583 | Temporarily set GDB's input port to PORT and then invoke THUNK.\n\ | |
1584 | \n\ | |
1585 | Arguments: port thunk\n\ | |
1586 | Returns: The result of calling THUNK.\n\ | |
1587 | \n\ | |
1588 | This procedure is experimental." }, | |
1589 | #endif | |
1590 | ||
1591 | { "%with-gdb-output-to-port", 2, 0, 0, | |
72e02483 | 1592 | as_a_scm_t_subr (gdbscm_percent_with_gdb_output_to_port), |
ed3ef339 DE |
1593 | "\ |
1594 | Temporarily set GDB's output port to PORT and then invoke THUNK.\n\ | |
1595 | \n\ | |
1596 | Arguments: port thunk\n\ | |
1597 | Returns: The result of calling THUNK.\n\ | |
1598 | \n\ | |
1599 | This procedure is experimental." }, | |
1600 | ||
1601 | { "%with-gdb-error-to-port", 2, 0, 0, | |
72e02483 | 1602 | as_a_scm_t_subr (gdbscm_percent_with_gdb_error_to_port), |
ed3ef339 DE |
1603 | "\ |
1604 | Temporarily set GDB's error port to PORT and then invoke THUNK.\n\ | |
1605 | \n\ | |
1606 | Arguments: port thunk\n\ | |
1607 | Returns: The result of calling THUNK.\n\ | |
1608 | \n\ | |
1609 | This procedure is experimental." }, | |
1610 | ||
1611 | END_FUNCTIONS | |
1612 | }; | |
1613 | ||
1614 | void | |
1615 | gdbscm_initialize_ports (void) | |
1616 | { | |
1617 | /* Save the original stdio ports for debugging purposes. */ | |
1618 | ||
1619 | orig_input_port_scm = scm_current_input_port (); | |
1620 | orig_output_port_scm = scm_current_output_port (); | |
1621 | orig_error_port_scm = scm_current_error_port (); | |
1622 | ||
1623 | /* Set up the stdio ports. */ | |
1624 | ||
1625 | ioscm_init_gdb_stdio_port (); | |
1626 | input_port_scm = ioscm_make_gdb_stdio_port (0); | |
1627 | output_port_scm = ioscm_make_gdb_stdio_port (1); | |
1628 | error_port_scm = ioscm_make_gdb_stdio_port (2); | |
1629 | ||
1630 | /* Set up memory ports. */ | |
1631 | ||
1632 | ioscm_init_memory_port_type (); | |
1633 | ||
1634 | /* Install the accessor functions. */ | |
1635 | ||
1636 | gdbscm_define_functions (port_functions, 1); | |
1637 | gdbscm_define_functions (private_port_functions, 0); | |
1638 | ||
1639 | /* Keyword args for open-memory. */ | |
1640 | ||
1641 | mode_keyword = scm_from_latin1_keyword ("mode"); | |
1642 | start_keyword = scm_from_latin1_keyword ("start"); | |
1643 | size_keyword = scm_from_latin1_keyword ("size"); | |
1644 | ||
68cf161c | 1645 | #if USING_GUILE_BEFORE_2_2 |
ed3ef339 DE |
1646 | /* Error message text for "out of range" memory port buffer sizes. */ |
1647 | ||
1648 | out_of_range_buf_size = xstrprintf ("size not between %u - %u", | |
1649 | min_memory_port_buf_size, | |
1650 | max_memory_port_buf_size); | |
68cf161c | 1651 | #endif |
ed3ef339 | 1652 | } |