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
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
*/
#define _GNU_SOURCE
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <ucontext.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <linux/compiler_attributes.h>
#include <linux/types.h>
#include <asm/getopt.h>
#include <asm/sections.h>
#include <asm/state.h>
#include <os.h>
#include <rtc_def.h>
/* Environment variable for time offset */
#define ENV_TIME_OFFSET "UBOOT_SB_TIME_OFFSET"
/* 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_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;
if (os_flags & OS_O_TRUNC)
flags |= O_TRUNC;
/*
* During a cold reset execv() is used to relaunch the U-Boot binary.
* We must ensure that all files are closed in this case.
*/
flags |= O_CLOEXEC;
return open(pathname, flags, 0777);
}
int os_close(int fd)
{
/* Do not close the console input */
if (fd)
return close(fd);
return -1;
}
int os_unlink(const char *pathname)
{
return unlink(pathname);
}
void os_exit(int exit_code)
{
exit(exit_code);
}
int os_write_file(const char *fname, const void *buf, int size)
{
int fd;
fd = os_open(fname, OS_O_WRONLY | OS_O_CREAT | OS_O_TRUNC);
if (fd < 0) {
printf("Cannot open file '%s'\n", fname);
return -EIO;
}
if (os_write(fd, buf, size) != size) {
printf("Cannot write to file '%s'\n", fname);
os_close(fd);
return -EIO;
}
os_close(fd);
return 0;
}
int os_read_file(const char *fname, void **bufp, int *sizep)
{
off_t size;
int ret = -EIO;
int fd;
fd = os_open(fname, OS_O_RDONLY);
if (fd < 0) {
printf("Cannot open file '%s'\n", fname);
goto err;
}
size = os_lseek(fd, 0, OS_SEEK_END);
if (size < 0) {
printf("Cannot seek to end of file '%s'\n", fname);
goto err;
}
if (os_lseek(fd, 0, OS_SEEK_SET) < 0) {
printf("Cannot seek to start of file '%s'\n", fname);
goto err;
}
*bufp = os_malloc(size);
if (!*bufp) {
printf("Not enough memory to read file '%s'\n", fname);
ret = -ENOMEM;
goto err;
}
if (os_read(fd, *bufp, size) != size) {
printf("Cannot read from file '%s'\n", fname);
goto err;
}
os_close(fd);
*sizep = size;
return 0;
err:
os_close(fd);
return ret;
}
/* Restore tty state when we exit */
static struct termios orig_term;
static bool term_setup;
static bool term_nonblock;
void os_fd_restore(void)
{
if (term_setup) {
int flags;
tcsetattr(0, TCSANOW, &orig_term);
if (term_nonblock) {
flags = fcntl(0, F_GETFL, 0);
fcntl(0, F_SETFL, flags & ~O_NONBLOCK);
}
term_setup = false;
}
}
static void os_sigint_handler(int sig)
{
os_fd_restore();
signal(SIGINT, SIG_DFL);
raise(SIGINT);
}
static void os_signal_handler(int sig, siginfo_t *info, void *con)
{
ucontext_t __maybe_unused *context = con;
unsigned long pc;
#if defined(__x86_64__)
pc = context->uc_mcontext.gregs[REG_RIP];
#elif defined(__aarch64__)
pc = context->uc_mcontext.pc;
#elif defined(__riscv)
pc = context->uc_mcontext.__gregs[REG_PC];
#else
const char msg[] =
"\nUnsupported architecture, cannot read program counter\n";
os_write(1, msg, sizeof(msg));
pc = 0;
#endif
os_signal_action(sig, pc);
}
int os_setup_signal_handlers(void)
{
struct sigaction act;
act.sa_sigaction = os_signal_handler;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_SIGINFO | SA_NODEFER;
if (sigaction(SIGILL, &act, NULL) ||
sigaction(SIGBUS, &act, NULL) ||
sigaction(SIGSEGV, &act, NULL))
return -1;
return 0;
}
/* Put tty into raw mode so <tab> and <ctrl+c> work */
void os_tty_raw(int fd, bool allow_sigs)
{
struct termios term;
int flags;
if (term_setup)
return;
/* 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 = allow_sigs ? ISIG : 0;
if (tcsetattr(fd, TCSANOW, &term))
return;
flags = fcntl(fd, F_GETFL, 0);
if (!(flags & O_NONBLOCK)) {
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK))
return;
term_nonblock = true;
}
term_setup = true;
atexit(os_fd_restore);
signal(SIGINT, os_sigint_handler);
}
/*
* Provide our own malloc so we don't use space in the sandbox ram_buf for
* allocations that are internal to sandbox, or need to be done before U-Boot's
* malloc() is ready.
*/
void *os_malloc(size_t length)
{
int page_size = getpagesize();
struct os_mem_hdr *hdr;
if (!length)
return NULL;
/*
* Use an address that is hopefully available to us so that pointers
* to this memory are fairly obvious. If we end up with a different
* address, that's fine too.
*/
hdr = mmap((void *)0x10000000, length + page_size,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (hdr == MAP_FAILED)
return NULL;
hdr->length = length;
return (void *)hdr + page_size;
}
void os_free(void *ptr)
{
int page_size = getpagesize();
struct os_mem_hdr *hdr;
if (ptr) {
hdr = ptr - page_size;
munmap(hdr, hdr->length + page_size);
}
}
/* These macros are from kernel.h but not accessible in this file */
#define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a) - 1)
#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
/*
* Provide our own malloc so we don't use space in the sandbox ram_buf for
* allocations that are internal to sandbox, or need to be done before U-Boot's
* malloc() is ready.
*/
void *os_realloc(void *ptr, size_t length)
{
int page_size = getpagesize();
struct os_mem_hdr *hdr;
void *new_ptr;
/* Reallocating a NULL pointer is just an alloc */
if (!ptr)
return os_malloc(length);
/* Changing a length to 0 is just a free */
if (length) {
os_free(ptr);
return NULL;
}
/*
* If the new size is the same number of pages as the old, nothing to
* do. There isn't much point in shrinking things
*/
hdr = ptr - page_size;
if (ALIGN(length, page_size) <= ALIGN(hdr->length, page_size))
return ptr;
/* We have to grow it, so allocate something new */
new_ptr = os_malloc(length);
memcpy(new_ptr, ptr, hdr->length);
os_free(ptr);
return new_ptr;
}
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 + 1));
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;
memset(&long_opts[num_options], '\0', sizeof(*long_opts));
/*
* 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;
os_free(node);
node = next;
}
}
int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
{
struct dirent *entry;
struct os_dirent_node *head, *node, *next;
struct stat buf;
DIR *dir;
int ret;
char *fname;
char *old_fname;
int len;
int dirlen;
*headp = NULL;
dir = opendir(dirname);
if (!dir)
return -1;
/* Create a buffer upfront, with typically sufficient size */
dirlen = strlen(dirname) + 2;
len = dirlen + 256;
fname = os_malloc(len);
if (!fname) {
ret = -ENOMEM;
goto done;
}
for (node = head = NULL;; node = next) {
errno = 0;
entry = readdir(dir);
if (!entry) {
ret = errno;
break;
}
next = os_malloc(sizeof(*node) + strlen(entry->d_name) + 1);
if (!next) {
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
if (dirlen + strlen(entry->d_name) > len) {
len = dirlen + strlen(entry->d_name);
old_fname = fname;
fname = os_realloc(fname, len);
if (!fname) {
os_free(old_fname);
os_free(next);
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
}
next->next = NULL;
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;
default:
next->type = OS_FILET_UNKNOWN;
}
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;
else
head = next;
}
*headp = head;
done:
closedir(dir);
os_free(fname);
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 >= OS_FILET_REG && type < OS_FILET_COUNT)
return os_dirent_typename[type];
return os_dirent_typename[OS_FILET_UNKNOWN];
}
int os_get_filesize(const char *fname, loff_t *size)
{
struct stat buf;
int ret;
ret = stat(fname, &buf);
if (ret)
return ret;
*size = buf.st_size;
return 0;
}
void os_putc(int ch)
{
putchar(ch);
}
void os_puts(const char *str)
{
while (*str)
os_putc(*str++);
}
int os_write_ram_buf(const char *fname)
{
struct sandbox_state *state = state_get_current();
int fd, ret;
fd = open(fname, O_CREAT | O_WRONLY, 0777);
if (fd < 0)
return -ENOENT;
ret = write(fd, state->ram_buf, state->ram_size);
close(fd);
if (ret != state->ram_size)
return -EIO;
return 0;
}
int os_read_ram_buf(const char *fname)
{
struct sandbox_state *state = state_get_current();
int fd, ret;
loff_t size;
ret = os_get_filesize(fname, &size);
if (ret < 0)
return ret;
if (size != state->ram_size)
return -ENOSPC;
fd = open(fname, O_RDONLY);
if (fd < 0)
return -ENOENT;
ret = read(fd, state->ram_buf, state->ram_size);
close(fd);
if (ret != state->ram_size)
return -EIO;
return 0;
}
static int make_exec(char *fname, const void *data, int size)
{
int fd;
strcpy(fname, "/tmp/u-boot.jump.XXXXXX");
fd = mkstemp(fname);
if (fd < 0)
return -ENOENT;
if (write(fd, data, size) < 0)
return -EIO;
close(fd);
if (chmod(fname, 0777))
return -ENOEXEC;
return 0;
}
/**
* add_args() - Allocate a new argv with the given args
*
* This is used to create a new argv array with all the old arguments and some
* new ones that are passed in
*
* @argvp: Returns newly allocated args list
* @add_args: Arguments to add, each a string
* @count: Number of arguments in @add_args
* @return 0 if OK, -ENOMEM if out of memory
*/
static int add_args(char ***argvp, char *add_args[], int count)
{
char **argv, **ap;
int argc;
for (argc = 0; (*argvp)[argc]; argc++)
;
argv = os_malloc((argc + count + 1) * sizeof(char *));
if (!argv) {
printf("Out of memory for %d argv\n", count);
return -ENOMEM;
}
for (ap = *argvp, argc = 0; *ap; ap++) {
char *arg = *ap;
/* Drop args that we don't want to propagate */
if (*arg == '-' && strlen(arg) == 2) {
switch (arg[1]) {
case 'j':
case 'm':
ap++;
continue;
}
} else if (!strcmp(arg, "--rm_memory")) {
ap++;
continue;
}
argv[argc++] = arg;
}
memcpy(argv + argc, add_args, count * sizeof(char *));
argv[argc + count] = NULL;
*argvp = argv;
return 0;
}
/**
* os_jump_to_file() - Jump to a new program
*
* This saves the memory buffer, sets up arguments to the new process, then
* execs it.
*
* @fname: Filename to exec
* @return does not return on success, any return value is an error
*/
static int os_jump_to_file(const char *fname)
{
struct sandbox_state *state = state_get_current();
char mem_fname[30];
int fd, err;
char *extra_args[5];
char **argv = state->argv;
int argc;
#ifdef DEBUG
int i;
#endif
strcpy(mem_fname, "/tmp/u-boot.mem.XXXXXX");
fd = mkstemp(mem_fname);
if (fd < 0)
return -ENOENT;
close(fd);
err = os_write_ram_buf(mem_fname);
if (err)
return err;
os_fd_restore();
extra_args[0] = "-j";
extra_args[1] = (char *)fname;
extra_args[2] = "-m";
extra_args[3] = mem_fname;
argc = 4;
if (state->ram_buf_rm)
extra_args[argc++] = "--rm_memory";
err = add_args(&argv, extra_args, argc);
if (err)
return err;
argv[0] = (char *)fname;
#ifdef DEBUG
for (i = 0; argv[i]; i++)
printf("%d %s\n", i, argv[i]);
#endif
if (state_uninit())
os_exit(2);
err = execv(fname, argv);
os_free(argv);
if (err) {
perror("Unable to run image");
printf("Image filename '%s'\n", fname);
return err;
}
return unlink(fname);
}
int os_jump_to_image(const void *dest, int size)
{
char fname[30];
int err;
err = make_exec(fname, dest, size);
if (err)
return err;
return os_jump_to_file(fname);
}
int os_find_u_boot(char *fname, int maxlen, bool use_img)
{
struct sandbox_state *state = state_get_current();
const char *progname = state->argv[0];
int len = strlen(progname);
const char *suffix;
char *p;
int fd;
if (len >= maxlen || len < 4)
return -ENOSPC;
strcpy(fname, progname);
suffix = fname + len - 4;
/* If we are TPL, boot to SPL */
if (!strcmp(suffix, "-tpl")) {
fname[len - 3] = 's';
fd = os_open(fname, O_RDONLY);
if (fd >= 0) {
close(fd);
return 0;
}
/* Look for 'u-boot-spl' in the spl/ directory */
p = strstr(fname, "/spl/");
if (p) {
p[1] = 's';
fd = os_open(fname, O_RDONLY);
if (fd >= 0) {
close(fd);
return 0;
}
}
return -ENOENT;
}
/* Look for 'u-boot' in the same directory as 'u-boot-spl' */
if (!strcmp(suffix, "-spl")) {
fname[len - 4] = '\0';
fd = os_open(fname, O_RDONLY);
if (fd >= 0) {
close(fd);
return 0;
}
}
/* Look for 'u-boot' in the parent directory of spl/ */
p = strstr(fname, "spl/");
if (p) {
/* Remove the "spl" characters */
memmove(p, p + 4, strlen(p + 4) + 1);
if (use_img)
strcat(p, ".img");
fd = os_open(fname, O_RDONLY);
if (fd >= 0) {
close(fd);
return 0;
}
}
return -ENOENT;
}
int os_spl_to_uboot(const char *fname)
{
struct sandbox_state *state = state_get_current();
/* U-Boot will delete ram buffer after read: "--rm_memory"*/
state->ram_buf_rm = true;
return os_jump_to_file(fname);
}
long os_get_time_offset(void)
{
const char *offset;
offset = getenv(ENV_TIME_OFFSET);
if (offset)
return strtol(offset, NULL, 0);
return 0;
}
void os_set_time_offset(long offset)
{
char buf[21];
int ret;
snprintf(buf, sizeof(buf), "%ld", offset);
ret = setenv(ENV_TIME_OFFSET, buf, true);
if (ret)
printf("Could not set environment variable %s\n",
ENV_TIME_OFFSET);
}
void os_localtime(struct rtc_time *rt)
{
time_t t = time(NULL);
struct tm *tm;
tm = localtime(&t);
rt->tm_sec = tm->tm_sec;
rt->tm_min = tm->tm_min;
rt->tm_hour = tm->tm_hour;
rt->tm_mday = tm->tm_mday;
rt->tm_mon = tm->tm_mon + 1;
rt->tm_year = tm->tm_year + 1900;
rt->tm_wday = tm->tm_wday;
rt->tm_yday = tm->tm_yday;
rt->tm_isdst = tm->tm_isdst;
}
void os_abort(void)
{
abort();
}
int os_mprotect_allow(void *start, size_t len)
{
int page_size = getpagesize();
/* Move start to the start of a page, len to the end */
start = (void *)(((ulong)start) & ~(page_size - 1));
len = (len + page_size * 2) & ~(page_size - 1);
return mprotect(start, len, PROT_READ | PROT_WRITE);
}
void *os_find_text_base(void)
{
char line[500];
void *base = NULL;
int len;
int fd;
/*
* This code assumes that the first line of /proc/self/maps holds
* information about the text, for example:
*
* 5622d9907000-5622d9a55000 r-xp 00000000 08:01 15067168 u-boot
*
* The first hex value is assumed to be the address.
*
* This is tested in Linux 4.15.
*/
fd = open("/proc/self/maps", O_RDONLY);
if (fd == -1)
return NULL;
len = read(fd, line, sizeof(line));
if (len > 0) {
char *end = memchr(line, '-', len);
if (end) {
uintptr_t addr;
*end = '\0';
if (sscanf(line, "%zx", &addr) == 1)
base = (void *)addr;
}
}
close(fd);
return base;
}
void os_relaunch(char *argv[])
{
execv(argv[0], argv);
os_exit(1);
}
|