summaryrefslogtreecommitdiff
path: root/arch/sandbox/cpu/os.c
blob: 88dd371760b7e20094cc32e57917f3a62633b424 (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
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <linux/types.h>

#include <asm/getopt.h>
#include <asm/sections.h>
#include <asm/state.h>
#include <os.h>

/* Operating System Interface */

struct os_mem_hdr {
	size_t length;		/* number of bytes in the block */
};

ssize_t os_read(int fd, void *buf, size_t count)
{
	return read(fd, buf, count);
}

ssize_t os_read_no_block(int fd, void *buf, size_t count)
{
	const int flags = fcntl(fd, F_GETFL, 0);

	fcntl(fd, F_SETFL, flags | O_NONBLOCK);
	return os_read(fd, buf, count);
}

ssize_t os_write(int fd, const void *buf, size_t count)
{
	return write(fd, buf, count);
}

off_t os_lseek(int fd, off_t offset, int whence)
{
	if (whence == OS_SEEK_SET)
		whence = SEEK_SET;
	else if (whence == OS_SEEK_CUR)
		whence = SEEK_CUR;
	else if (whence == OS_SEEK_END)
		whence = SEEK_END;
	else
		os_exit(1);
	return lseek(fd, offset, whence);
}

int os_open(const char *pathname, int os_flags)
{
	int flags;

	switch (os_flags & OS_O_MASK) {
	case OS_O_RDONLY:
	default:
		flags = O_RDONLY;
		break;

	case OS_O_WRONLY:
		flags = O_WRONLY;
		break;

	case OS_O_RDWR:
		flags = O_RDWR;
		break;
	}

	if (os_flags & OS_O_CREAT)
		flags |= O_CREAT;

	return open(pathname, flags, 0777);
}

int os_close(int fd)
{
	return close(fd);
}

void os_exit(int exit_code)
{
	exit(exit_code);
}

/* Restore tty state when we exit */
static struct termios orig_term;

static void os_fd_restore(void)
{
	tcsetattr(0, TCSANOW, &orig_term);
}

/* Put tty into raw mode so <tab> and <ctrl+c> work */
void os_tty_raw(int fd)
{
	static int setup = 0;
	struct termios term;

	if (setup)
		return;
	setup = 1;

	/* If not a tty, don't complain */
	if (tcgetattr(fd, &orig_term))
		return;

	term = orig_term;
	term.c_iflag = IGNBRK | IGNPAR;
	term.c_oflag = OPOST | ONLCR;
	term.c_cflag = CS8 | CREAD | CLOCAL;
	term.c_lflag = 0;
	if (tcsetattr(fd, TCSANOW, &term))
		return;

	atexit(os_fd_restore);
}

void *os_malloc(size_t length)
{
	struct os_mem_hdr *hdr;

	hdr = mmap(NULL, length + sizeof(*hdr), PROT_READ | PROT_WRITE,
		   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
	if (hdr == MAP_FAILED)
		return NULL;
	hdr->length = length;

	return hdr + 1;
}

void *os_free(void *ptr)
{
	struct os_mem_hdr *hdr = ptr;

	hdr--;
	if (ptr)
		munmap(hdr, hdr->length + sizeof(*hdr));
}

void *os_realloc(void *ptr, size_t length)
{
	struct os_mem_hdr *hdr = ptr;
	void *buf = NULL;

	hdr--;
	if (length != 0) {
		buf = os_malloc(length);
		if (!buf)
			return buf;
		if (ptr) {
			if (length > hdr->length)
				length = hdr->length;
			memcpy(buf, ptr, length);
		}
	}
	os_free(ptr);

	return buf;
}

void os_usleep(unsigned long usec)
{
	usleep(usec);
}

uint64_t __attribute__((no_instrument_function)) os_get_nsec(void)
{
#if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
	struct timespec tp;
	if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
		struct timeval tv;

		gettimeofday(&tv, NULL);
		tp.tv_sec = tv.tv_sec;
		tp.tv_nsec = tv.tv_usec * 1000;
	}
	return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
#else
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
#endif
}

static char *short_opts;
static struct option *long_opts;

int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
{
	struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
	size_t num_options = __u_boot_sandbox_option_count();
	size_t i;

	int hidden_short_opt;
	size_t si;

	int c;

	if (short_opts || long_opts)
		return 1;

	state->argc = argc;
	state->argv = argv;

	/* dynamically construct the arguments to the system getopt_long */
	short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1);
	long_opts = os_malloc(sizeof(*long_opts) * num_options);
	if (!short_opts || !long_opts)
		return 1;

	/*
	 * getopt_long requires "val" to be unique (since that is what the
	 * func returns), so generate unique values automatically for flags
	 * that don't have a short option.  pick 0x100 as that is above the
	 * single byte range (where ASCII/ISO-XXXX-X charsets live).
	 */
	hidden_short_opt = 0x100;
	si = 0;
	for (i = 0; i < num_options; ++i) {
		long_opts[i].name = sb_opt[i]->flag;
		long_opts[i].has_arg = sb_opt[i]->has_arg ?
			required_argument : no_argument;
		long_opts[i].flag = NULL;

		if (sb_opt[i]->flag_short) {
			short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
			if (long_opts[i].has_arg == required_argument)
				short_opts[si++] = ':';
		} else
			long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
	}
	short_opts[si] = '\0';

	/* we need to handle output ourselves since u-boot provides printf */
	opterr = 0;

	/*
	 * walk all of the options the user gave us on the command line,
	 * figure out what u-boot option structure they belong to (via
	 * the unique short val key), and call the appropriate callback.
	 */
	while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
		for (i = 0; i < num_options; ++i) {
			if (sb_opt[i]->flag_short == c) {
				if (sb_opt[i]->callback(state, optarg)) {
					state->parse_err = sb_opt[i]->flag;
					return 0;
				}
				break;
			}
		}
		if (i == num_options) {
			/*
			 * store the faulting flag for later display.  we have to
			 * store the flag itself as the getopt parsing itself is
			 * tricky: need to handle the following flags (assume all
			 * of the below are unknown):
			 *   -a        optopt='a' optind=<next>
			 *   -abbbb    optopt='a' optind=<this>
			 *   -aaaaa    optopt='a' optind=<this>
			 *   --a       optopt=0   optind=<this>
			 * as you can see, it is impossible to determine the exact
			 * faulting flag without doing the parsing ourselves, so
			 * we just report the specific flag that failed.
			 */
			if (optopt) {
				static char parse_err[3] = { '-', 0, '\0', };
				parse_err[1] = optopt;
				state->parse_err = parse_err;
			} else
				state->parse_err = argv[optind - 1];
			break;
		}
	}

	return 0;
}

void os_dirent_free(struct os_dirent_node *node)
{
	struct os_dirent_node *next;

	while (node) {
		next = node->next;
		free(node);
		node = next;
	}
}

int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
{
	struct dirent entry, *result;
	struct os_dirent_node *head, *node, *next;
	struct stat buf;
	DIR *dir;
	int ret;
	char *fname;
	int len;

	*headp = NULL;
	dir = opendir(dirname);
	if (!dir)
		return -1;

	/* Create a buffer for the maximum filename length */
	len = sizeof(entry.d_name) + strlen(dirname) + 2;
	fname = malloc(len);
	if (!fname) {
		ret = -ENOMEM;
		goto done;
	}

	for (node = head = NULL;; node = next) {
		ret = readdir_r(dir, &entry, &result);
		if (ret || !result)
			break;
		next = malloc(sizeof(*node) + strlen(entry.d_name) + 1);
		if (!next) {
			os_dirent_free(head);
			ret = -ENOMEM;
			goto done;
		}
		strcpy(next->name, entry.d_name);
		switch (entry.d_type) {
		case DT_REG:
			next->type = OS_FILET_REG;
			break;
		case DT_DIR:
			next->type = OS_FILET_DIR;
			break;
		case DT_LNK:
			next->type = OS_FILET_LNK;
			break;
		}
		next->size = 0;
		snprintf(fname, len, "%s/%s", dirname, next->name);
		if (!stat(fname, &buf))
			next->size = buf.st_size;
		if (node)
			node->next = next;
		if (!head)
			head = node;
	}
	*headp = head;

done:
	closedir(dir);
	return ret;
}

const char *os_dirent_typename[OS_FILET_COUNT] = {
	"   ",
	"SYM",
	"DIR",
	"???",
};

const char *os_dirent_get_typename(enum os_dirent_t type)
{
	if (type >= 0 && type < OS_FILET_COUNT)
		return os_dirent_typename[type];

	return os_dirent_typename[OS_FILET_UNKNOWN];
}

ssize_t os_get_filesize(const char *fname)
{
	struct stat buf;
	int ret;

	ret = stat(fname, &buf);
	if (ret)
		return ret;
	return buf.st_size;
}