summaryrefslogtreecommitdiff
path: root/tools/bpf/bpftool/prog.c
blob: 12b694fe0404afff1f4aa2d068c247c43e1acb65 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
/*
 * Copyright (C) 2017 Netronome Systems, Inc.
 *
 * This software is dual licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree or the BSD 2-Clause License provided below.  You have the
 * option to license this software under the complete terms of either license.
 *
 * The BSD 2-Clause License:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      1. Redistributions of source code must retain the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer.
 *
 *      2. Redistributions in binary form must reproduce the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer in the documentation and/or other materials
 *         provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/* Author: Jakub Kicinski <kubakici@wp.pl> */

#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <bpf.h>
#include <libbpf.h>

#include "cfg.h"
#include "main.h"
#include "xlated_dumper.h"

static const char * const prog_type_name[] = {
	[BPF_PROG_TYPE_UNSPEC]		= "unspec",
	[BPF_PROG_TYPE_SOCKET_FILTER]	= "socket_filter",
	[BPF_PROG_TYPE_KPROBE]		= "kprobe",
	[BPF_PROG_TYPE_SCHED_CLS]	= "sched_cls",
	[BPF_PROG_TYPE_SCHED_ACT]	= "sched_act",
	[BPF_PROG_TYPE_TRACEPOINT]	= "tracepoint",
	[BPF_PROG_TYPE_XDP]		= "xdp",
	[BPF_PROG_TYPE_PERF_EVENT]	= "perf_event",
	[BPF_PROG_TYPE_CGROUP_SKB]	= "cgroup_skb",
	[BPF_PROG_TYPE_CGROUP_SOCK]	= "cgroup_sock",
	[BPF_PROG_TYPE_LWT_IN]		= "lwt_in",
	[BPF_PROG_TYPE_LWT_OUT]		= "lwt_out",
	[BPF_PROG_TYPE_LWT_XMIT]	= "lwt_xmit",
	[BPF_PROG_TYPE_SOCK_OPS]	= "sock_ops",
	[BPF_PROG_TYPE_SK_SKB]		= "sk_skb",
	[BPF_PROG_TYPE_CGROUP_DEVICE]	= "cgroup_device",
	[BPF_PROG_TYPE_SK_MSG]		= "sk_msg",
	[BPF_PROG_TYPE_RAW_TRACEPOINT]	= "raw_tracepoint",
	[BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr",
	[BPF_PROG_TYPE_LIRC_MODE2]	= "lirc_mode2",
};

static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
{
	struct timespec real_time_ts, boot_time_ts;
	time_t wallclock_secs;
	struct tm load_tm;

	buf[--size] = '\0';

	if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
	    clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
		perror("Can't read clocks");
		snprintf(buf, size, "%llu", nsecs / 1000000000);
		return;
	}

	wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
		(real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
		1000000000;


	if (!localtime_r(&wallclock_secs, &load_tm)) {
		snprintf(buf, size, "%llu", nsecs / 1000000000);
		return;
	}

	if (json_output)
		strftime(buf, size, "%s", &load_tm);
	else
		strftime(buf, size, "%FT%T%z", &load_tm);
}

static int prog_fd_by_tag(unsigned char *tag)
{
	struct bpf_prog_info info = {};
	__u32 len = sizeof(info);
	unsigned int id = 0;
	int err;
	int fd;

	while (true) {
		err = bpf_prog_get_next_id(id, &id);
		if (err) {
			p_err("%s", strerror(errno));
			return -1;
		}

		fd = bpf_prog_get_fd_by_id(id);
		if (fd < 0) {
			p_err("can't get prog by id (%u): %s",
			      id, strerror(errno));
			return -1;
		}

		err = bpf_obj_get_info_by_fd(fd, &info, &len);
		if (err) {
			p_err("can't get prog info (%u): %s",
			      id, strerror(errno));
			close(fd);
			return -1;
		}

		if (!memcmp(tag, info.tag, BPF_TAG_SIZE))
			return fd;

		close(fd);
	}
}

int prog_parse_fd(int *argc, char ***argv)
{
	int fd;

	if (is_prefix(**argv, "id")) {
		unsigned int id;
		char *endptr;

		NEXT_ARGP();

		id = strtoul(**argv, &endptr, 0);
		if (*endptr) {
			p_err("can't parse %s as ID", **argv);
			return -1;
		}
		NEXT_ARGP();

		fd = bpf_prog_get_fd_by_id(id);
		if (fd < 0)
			p_err("get by id (%u): %s", id, strerror(errno));
		return fd;
	} else if (is_prefix(**argv, "tag")) {
		unsigned char tag[BPF_TAG_SIZE];

		NEXT_ARGP();

		if (sscanf(**argv, BPF_TAG_FMT, tag, tag + 1, tag + 2,
			   tag + 3, tag + 4, tag + 5, tag + 6, tag + 7)
		    != BPF_TAG_SIZE) {
			p_err("can't parse tag");
			return -1;
		}
		NEXT_ARGP();

		return prog_fd_by_tag(tag);
	} else if (is_prefix(**argv, "pinned")) {
		char *path;

		NEXT_ARGP();

		path = **argv;
		NEXT_ARGP();

		return open_obj_pinned_any(path, BPF_OBJ_PROG);
	}

	p_err("expected 'id', 'tag' or 'pinned', got: '%s'?", **argv);
	return -1;
}

static void show_prog_maps(int fd, u32 num_maps)
{
	struct bpf_prog_info info = {};
	__u32 len = sizeof(info);
	__u32 map_ids[num_maps];
	unsigned int i;
	int err;

	info.nr_map_ids = num_maps;
	info.map_ids = ptr_to_u64(map_ids);

	err = bpf_obj_get_info_by_fd(fd, &info, &len);
	if (err || !info.nr_map_ids)
		return;

	if (json_output) {
		jsonw_name(json_wtr, "map_ids");
		jsonw_start_array(json_wtr);
		for (i = 0; i < info.nr_map_ids; i++)
			jsonw_uint(json_wtr, map_ids[i]);
		jsonw_end_array(json_wtr);
	} else {
		printf("  map_ids ");
		for (i = 0; i < info.nr_map_ids; i++)
			printf("%u%s", map_ids[i],
			       i == info.nr_map_ids - 1 ? "" : ",");
	}
}

static void print_prog_json(struct bpf_prog_info *info, int fd)
{
	char *memlock;

	jsonw_start_object(json_wtr);
	jsonw_uint_field(json_wtr, "id", info->id);
	if (info->type < ARRAY_SIZE(prog_type_name))
		jsonw_string_field(json_wtr, "type",
				   prog_type_name[info->type]);
	else
		jsonw_uint_field(json_wtr, "type", info->type);

	if (*info->name)
		jsonw_string_field(json_wtr, "name", info->name);

	jsonw_name(json_wtr, "tag");
	jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
		     info->tag[0], info->tag[1], info->tag[2], info->tag[3],
		     info->tag[4], info->tag[5], info->tag[6], info->tag[7]);

	jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);

	print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);

	if (info->load_time) {
		char buf[32];

		print_boot_time(info->load_time, buf, sizeof(buf));

		/* Piggy back on load_time, since 0 uid is a valid one */
		jsonw_name(json_wtr, "loaded_at");
		jsonw_printf(json_wtr, "%s", buf);
		jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
	}

	jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);

	if (info->jited_prog_len) {
		jsonw_bool_field(json_wtr, "jited", true);
		jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
	} else {
		jsonw_bool_field(json_wtr, "jited", false);
	}

	memlock = get_fdinfo(fd, "memlock");
	if (memlock)
		jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
	free(memlock);

	if (info->nr_map_ids)
		show_prog_maps(fd, info->nr_map_ids);

	if (!hash_empty(prog_table.table)) {
		struct pinned_obj *obj;

		jsonw_name(json_wtr, "pinned");
		jsonw_start_array(json_wtr);
		hash_for_each_possible(prog_table.table, obj, hash, info->id) {
			if (obj->id == info->id)
				jsonw_string(json_wtr, obj->path);
		}
		jsonw_end_array(json_wtr);
	}

	jsonw_end_object(json_wtr);
}

static void print_prog_plain(struct bpf_prog_info *info, int fd)
{
	char *memlock;

	printf("%u: ", info->id);
	if (info->type < ARRAY_SIZE(prog_type_name))
		printf("%s  ", prog_type_name[info->type]);
	else
		printf("type %u  ", info->type);

	if (*info->name)
		printf("name %s  ", info->name);

	printf("tag ");
	fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
	print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
	printf("%s", info->gpl_compatible ? "  gpl" : "");
	printf("\n");

	if (info->load_time) {
		char buf[32];

		print_boot_time(info->load_time, buf, sizeof(buf));

		/* Piggy back on load_time, since 0 uid is a valid one */
		printf("\tloaded_at %s  uid %u\n", buf, info->created_by_uid);
	}

	printf("\txlated %uB", info->xlated_prog_len);

	if (info->jited_prog_len)
		printf("  jited %uB", info->jited_prog_len);
	else
		printf("  not jited");

	memlock = get_fdinfo(fd, "memlock");
	if (memlock)
		printf("  memlock %sB", memlock);
	free(memlock);

	if (info->nr_map_ids)
		show_prog_maps(fd, info->nr_map_ids);

	if (!hash_empty(prog_table.table)) {
		struct pinned_obj *obj;

		printf("\n");
		hash_for_each_possible(prog_table.table, obj, hash, info->id) {
			if (obj->id == info->id)
				printf("\tpinned %s\n", obj->path);
		}
	}

	printf("\n");
}

static int show_prog(int fd)
{
	struct bpf_prog_info info = {};
	__u32 len = sizeof(info);
	int err;

	err = bpf_obj_get_info_by_fd(fd, &info, &len);
	if (err) {
		p_err("can't get prog info: %s", strerror(errno));
		return -1;
	}

	if (json_output)
		print_prog_json(&info, fd);
	else
		print_prog_plain(&info, fd);

	return 0;
}

static int do_show(int argc, char **argv)
{
	__u32 id = 0;
	int err;
	int fd;

	if (show_pinned)
		build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);

	if (argc == 2) {
		fd = prog_parse_fd(&argc, &argv);
		if (fd < 0)
			return -1;

		return show_prog(fd);
	}

	if (argc)
		return BAD_ARG();

	if (json_output)
		jsonw_start_array(json_wtr);
	while (true) {
		err = bpf_prog_get_next_id(id, &id);
		if (err) {
			if (errno == ENOENT) {
				err = 0;
				break;
			}
			p_err("can't get next program: %s%s", strerror(errno),
			      errno == EINVAL ? " -- kernel too old?" : "");
			err = -1;
			break;
		}

		fd = bpf_prog_get_fd_by_id(id);
		if (fd < 0) {
			if (errno == ENOENT)
				continue;
			p_err("can't get prog by id (%u): %s",
			      id, strerror(errno));
			err = -1;
			break;
		}

		err = show_prog(fd);
		close(fd);
		if (err)
			break;
	}

	if (json_output)
		jsonw_end_array(json_wtr);

	return err;
}

static int do_dump(int argc, char **argv)
{
	unsigned long *func_ksyms = NULL;
	struct bpf_prog_info info = {};
	unsigned int *func_lens = NULL;
	unsigned int nr_func_ksyms;
	unsigned int nr_func_lens;
	struct dump_data dd = {};
	__u32 len = sizeof(info);
	unsigned int buf_size;
	char *filepath = NULL;
	bool opcodes = false;
	bool visual = false;
	unsigned char *buf;
	__u32 *member_len;
	__u64 *member_ptr;
	ssize_t n;
	int err;
	int fd;

	if (is_prefix(*argv, "jited")) {
		member_len = &info.jited_prog_len;
		member_ptr = &info.jited_prog_insns;
	} else if (is_prefix(*argv, "xlated")) {
		member_len = &info.xlated_prog_len;
		member_ptr = &info.xlated_prog_insns;
	} else {
		p_err("expected 'xlated' or 'jited', got: %s", *argv);
		return -1;
	}
	NEXT_ARG();

	if (argc < 2)
		usage();

	fd = prog_parse_fd(&argc, &argv);
	if (fd < 0)
		return -1;

	if (is_prefix(*argv, "file")) {
		NEXT_ARG();
		if (!argc) {
			p_err("expected file path");
			return -1;
		}

		filepath = *argv;
		NEXT_ARG();
	} else if (is_prefix(*argv, "opcodes")) {
		opcodes = true;
		NEXT_ARG();
	} else if (is_prefix(*argv, "visual")) {
		visual = true;
		NEXT_ARG();
	}

	if (argc) {
		usage();
		return -1;
	}

	err = bpf_obj_get_info_by_fd(fd, &info, &len);
	if (err) {
		p_err("can't get prog info: %s", strerror(errno));
		return -1;
	}

	if (!*member_len) {
		p_info("no instructions returned");
		close(fd);
		return 0;
	}

	buf_size = *member_len;

	buf = malloc(buf_size);
	if (!buf) {
		p_err("mem alloc failed");
		close(fd);
		return -1;
	}

	nr_func_ksyms = info.nr_jited_ksyms;
	if (nr_func_ksyms) {
		func_ksyms = malloc(nr_func_ksyms * sizeof(__u64));
		if (!func_ksyms) {
			p_err("mem alloc failed");
			close(fd);
			goto err_free;
		}
	}

	nr_func_lens = info.nr_jited_func_lens;
	if (nr_func_lens) {
		func_lens = malloc(nr_func_lens * sizeof(__u32));
		if (!func_lens) {
			p_err("mem alloc failed");
			close(fd);
			goto err_free;
		}
	}

	memset(&info, 0, sizeof(info));

	*member_ptr = ptr_to_u64(buf);
	*member_len = buf_size;
	info.jited_ksyms = ptr_to_u64(func_ksyms);
	info.nr_jited_ksyms = nr_func_ksyms;
	info.jited_func_lens = ptr_to_u64(func_lens);
	info.nr_jited_func_lens = nr_func_lens;

	err = bpf_obj_get_info_by_fd(fd, &info, &len);
	close(fd);
	if (err) {
		p_err("can't get prog info: %s", strerror(errno));
		goto err_free;
	}

	if (*member_len > buf_size) {
		p_err("too many instructions returned");
		goto err_free;
	}

	if (info.nr_jited_ksyms > nr_func_ksyms) {
		p_err("too many addresses returned");
		goto err_free;
	}

	if (info.nr_jited_func_lens > nr_func_lens) {
		p_err("too many values returned");
		goto err_free;
	}

	if ((member_len == &info.jited_prog_len &&
	     info.jited_prog_insns == 0) ||
	    (member_len == &info.xlated_prog_len &&
	     info.xlated_prog_insns == 0)) {
		p_err("error retrieving insn dump: kernel.kptr_restrict set?");
		goto err_free;
	}

	if (filepath) {
		fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
		if (fd < 0) {
			p_err("can't open file %s: %s", filepath,
			      strerror(errno));
			goto err_free;
		}

		n = write(fd, buf, *member_len);
		close(fd);
		if (n != *member_len) {
			p_err("error writing output file: %s",
			      n < 0 ? strerror(errno) : "short write");
			goto err_free;
		}

		if (json_output)
			jsonw_null(json_wtr);
	} else if (member_len == &info.jited_prog_len) {
		const char *name = NULL;

		if (info.ifindex) {
			name = ifindex_to_bfd_name_ns(info.ifindex,
						      info.netns_dev,
						      info.netns_ino);
			if (!name)
				goto err_free;
		}

		if (info.nr_jited_func_lens && info.jited_func_lens) {
			struct kernel_sym *sym = NULL;
			char sym_name[SYM_MAX_NAME];
			unsigned char *img = buf;
			__u64 *ksyms = NULL;
			__u32 *lens;
			__u32 i;

			if (info.nr_jited_ksyms) {
				kernel_syms_load(&dd);
				ksyms = (__u64 *) info.jited_ksyms;
			}

			if (json_output)
				jsonw_start_array(json_wtr);

			lens = (__u32 *) info.jited_func_lens;
			for (i = 0; i < info.nr_jited_func_lens; i++) {
				if (ksyms) {
					sym = kernel_syms_search(&dd, ksyms[i]);
					if (sym)
						sprintf(sym_name, "%s", sym->name);
					else
						sprintf(sym_name, "0x%016llx", ksyms[i]);
				} else {
					strcpy(sym_name, "unknown");
				}

				if (json_output) {
					jsonw_start_object(json_wtr);
					jsonw_name(json_wtr, "name");
					jsonw_string(json_wtr, sym_name);
					jsonw_name(json_wtr, "insns");
				} else {
					printf("%s:\n", sym_name);
				}

				disasm_print_insn(img, lens[i], opcodes, name);
				img += lens[i];

				if (json_output)
					jsonw_end_object(json_wtr);
				else
					printf("\n");
			}

			if (json_output)
				jsonw_end_array(json_wtr);
		} else {
			disasm_print_insn(buf, *member_len, opcodes, name);
		}
	} else if (visual) {
		if (json_output)
			jsonw_null(json_wtr);
		else
			dump_xlated_cfg(buf, *member_len);
	} else {
		kernel_syms_load(&dd);
		dd.nr_jited_ksyms = info.nr_jited_ksyms;
		dd.jited_ksyms = (__u64 *) info.jited_ksyms;

		if (json_output)
			dump_xlated_json(&dd, buf, *member_len, opcodes);
		else
			dump_xlated_plain(&dd, buf, *member_len, opcodes);
		kernel_syms_destroy(&dd);
	}

	free(buf);
	free(func_ksyms);
	free(func_lens);
	return 0;

err_free:
	free(buf);
	free(func_ksyms);
	free(func_lens);
	return -1;
}

static int do_pin(int argc, char **argv)
{
	int err;

	err = do_pin_any(argc, argv, bpf_prog_get_fd_by_id);
	if (!err && json_output)
		jsonw_null(json_wtr);
	return err;
}

static int do_load(int argc, char **argv)
{
	struct bpf_object *obj;
	int prog_fd;

	if (argc != 2)
		usage();

	if (bpf_prog_load(argv[0], BPF_PROG_TYPE_UNSPEC, &obj, &prog_fd)) {
		p_err("failed to load program");
		return -1;
	}

	if (do_pin_fd(prog_fd, argv[1]))
		return -1;

	if (json_output)
		jsonw_null(json_wtr);

	return 0;
}

static int do_help(int argc, char **argv)
{
	if (json_output) {
		jsonw_null(json_wtr);
		return 0;
	}

	fprintf(stderr,
		"Usage: %s %s { show | list } [PROG]\n"
		"       %s %s dump xlated PROG [{ file FILE | opcodes | visual }]\n"
		"       %s %s dump jited  PROG [{ file FILE | opcodes }]\n"
		"       %s %s pin   PROG FILE\n"
		"       %s %s load  OBJ  FILE\n"
		"       %s %s help\n"
		"\n"
		"       " HELP_SPEC_PROGRAM "\n"
		"       " HELP_SPEC_OPTIONS "\n"
		"",
		bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
		bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2]);

	return 0;
}

static const struct cmd cmds[] = {
	{ "show",	do_show },
	{ "list",	do_show },
	{ "help",	do_help },
	{ "dump",	do_dump },
	{ "pin",	do_pin },
	{ "load",	do_load },
	{ 0 }
};

int do_prog(int argc, char **argv)
{
	return cmd_select(cmds, argc, argv, do_help);
}