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Linux 5.1.15
[linux/fpc-iii.git] / tools / perf / util / jitdump.c
blobeda28d3570bc0deff3fd4237149db54986d204ed
1 // SPDX-License-Identifier: GPL-2.0
2 #include <sys/sysmacros.h>
3 #include <sys/types.h>
4 #include <errno.h>
5 #include <libgen.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <fcntl.h>
10 #include <unistd.h>
11 #include <inttypes.h>
12 #include <byteswap.h>
13 #include <sys/stat.h>
14 #include <sys/mman.h>
15 #include <linux/stringify.h>
16
17 #include "util.h"
18 #include "event.h"
19 #include "debug.h"
20 #include "evlist.h"
21 #include "symbol.h"
22 #include <elf.h>
23
24 #include "tsc.h"
25 #include "session.h"
26 #include "jit.h"
27 #include "jitdump.h"
28 #include "genelf.h"
29 #include "../builtin.h"
30
31 #include "sane_ctype.h"
32
33 struct jit_buf_desc {
34 struct perf_data *output;
35 struct perf_session *session;
36 struct machine *machine;
37 union jr_entry *entry;
38 void *buf;
39 uint64_t sample_type;
40 size_t bufsize;
41 FILE *in;
42 bool needs_bswap; /* handles cross-endianness */
43 bool use_arch_timestamp;
44 void *debug_data;
45 void *unwinding_data;
46 uint64_t unwinding_size;
47 uint64_t unwinding_mapped_size;
48 uint64_t eh_frame_hdr_size;
49 size_t nr_debug_entries;
50 uint32_t code_load_count;
51 u64 bytes_written;
52 struct rb_root code_root;
53 char dir[PATH_MAX];
54 };
55
56 struct debug_line_info {
57 unsigned long vma;
58 unsigned int lineno;
59 /* The filename format is unspecified, absolute path, relative etc. */
60 char const filename[0];
61 };
62
63 struct jit_tool {
64 struct perf_tool tool;
65 struct perf_data output;
66 struct perf_data input;
67 u64 bytes_written;
68 };
69
70 #define hmax(a, b) ((a) > (b) ? (a) : (b))
71 #define get_jit_tool(t) (container_of(tool, struct jit_tool, tool))
72
73 static int
74 jit_emit_elf(char *filename,
75 const char *sym,
76 uint64_t code_addr,
77 const void *code,
78 int csize,
79 void *debug,
80 int nr_debug_entries,
81 void *unwinding,
82 uint32_t unwinding_header_size,
83 uint32_t unwinding_size)
84 {
85 int ret, fd;
86
87 if (verbose > 0)
88 fprintf(stderr, "write ELF image %s\n", filename);
89
90 fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644);
91 if (fd == -1) {
92 pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno));
93 return -1;
94 }
95
96 ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries,
97 unwinding, unwinding_header_size, unwinding_size);
98
99 close(fd);
100
101 if (ret)
102 unlink(filename);
103
104 return ret;
105 }
106
107 static void
108 jit_close(struct jit_buf_desc *jd)
109 {
110 if (!(jd && jd->in))
111 return;
112 funlockfile(jd->in);
113 fclose(jd->in);
114 jd->in = NULL;
115 }
116
117 static int
118 jit_validate_events(struct perf_session *session)
119 {
120 struct perf_evsel *evsel;
121
122 /*
123 * check that all events use CLOCK_MONOTONIC
124 */
125 evlist__for_each_entry(session->evlist, evsel) {
126 if (evsel->attr.use_clockid == 0 || evsel->attr.clockid != CLOCK_MONOTONIC)
127 return -1;
128 }
129 return 0;
130 }
131
132 static int
133 jit_open(struct jit_buf_desc *jd, const char *name)
134 {
135 struct jitheader header;
136 struct jr_prefix *prefix;
137 ssize_t bs, bsz = 0;
138 void *n, *buf = NULL;
139 int ret, retval = -1;
140
141 jd->in = fopen(name, "r");
142 if (!jd->in)
143 return -1;
144
145 bsz = hmax(sizeof(header), sizeof(*prefix));
146
147 buf = malloc(bsz);
148 if (!buf)
149 goto error;
150
151 /*
152 * protect from writer modifying the file while we are reading it
153 */
154 flockfile(jd->in);
155
156 ret = fread(buf, sizeof(header), 1, jd->in);
157 if (ret != 1)
158 goto error;
159
160 memcpy(&header, buf, sizeof(header));
161
162 if (header.magic != JITHEADER_MAGIC) {
163 if (header.magic != JITHEADER_MAGIC_SW)
164 goto error;
165 jd->needs_bswap = true;
166 }
167
168 if (jd->needs_bswap) {
169 header.version = bswap_32(header.version);
170 header.total_size = bswap_32(header.total_size);
171 header.pid = bswap_32(header.pid);
172 header.elf_mach = bswap_32(header.elf_mach);
173 header.timestamp = bswap_64(header.timestamp);
174 header.flags = bswap_64(header.flags);
175 }
176
177 jd->use_arch_timestamp = header.flags & JITDUMP_FLAGS_ARCH_TIMESTAMP;
178
179 if (verbose > 2)
180 pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\nuse_arch_timestamp=%d\n",
181 header.version,
182 header.total_size,
183 (unsigned long long)header.timestamp,
184 header.pid,
185 header.elf_mach,
186 jd->use_arch_timestamp);
187
188 if (header.version > JITHEADER_VERSION) {
189 pr_err("wrong jitdump version %u, expected " __stringify(JITHEADER_VERSION),
190 header.version);
191 goto error;
192 }
193
194 if (header.flags & JITDUMP_FLAGS_RESERVED) {
195 pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",
196 (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);
197 goto error;
198 }
199
200 if (jd->use_arch_timestamp && !jd->session->time_conv.time_mult) {
201 pr_err("jitdump file uses arch timestamps but there is no timestamp conversion\n");
202 goto error;
203 }
204
205 /*
206 * validate event is using the correct clockid
207 */
208 if (!jd->use_arch_timestamp && jit_validate_events(jd->session)) {
209 pr_err("error, jitted code must be sampled with perf record -k 1\n");
210 goto error;
211 }
212
213 bs = header.total_size - sizeof(header);
214
215 if (bs > bsz) {
216 n = realloc(buf, bs);
217 if (!n)
218 goto error;
219 bsz = bs;
220 buf = n;
221 /* read extra we do not know about */
222 ret = fread(buf, bs - bsz, 1, jd->in);
223 if (ret != 1)
224 goto error;
225 }
226 /*
227 * keep dirname for generating files and mmap records
228 */
229 strcpy(jd->dir, name);
230 dirname(jd->dir);
231
232 return 0;
233 error:
234 funlockfile(jd->in);
235 fclose(jd->in);
236 return retval;
237 }
238
239 static union jr_entry *
240 jit_get_next_entry(struct jit_buf_desc *jd)
241 {
242 struct jr_prefix *prefix;
243 union jr_entry *jr;
244 void *addr;
245 size_t bs, size;
246 int id, ret;
247
248 if (!(jd && jd->in))
249 return NULL;
250
251 if (jd->buf == NULL) {
252 size_t sz = getpagesize();
253 if (sz < sizeof(*prefix))
254 sz = sizeof(*prefix);
255
256 jd->buf = malloc(sz);
257 if (jd->buf == NULL)
258 return NULL;
259
260 jd->bufsize = sz;
261 }
262
263 prefix = jd->buf;
264
265 /*
266 * file is still locked at this point
267 */
268 ret = fread(prefix, sizeof(*prefix), 1, jd->in);
269 if (ret != 1)
270 return NULL;
271
272 if (jd->needs_bswap) {
273 prefix->id = bswap_32(prefix->id);
274 prefix->total_size = bswap_32(prefix->total_size);
275 prefix->timestamp = bswap_64(prefix->timestamp);
276 }
277 id = prefix->id;
278 size = prefix->total_size;
279
280 bs = (size_t)size;
281 if (bs < sizeof(*prefix))
282 return NULL;
283
284 if (id >= JIT_CODE_MAX) {
285 pr_warning("next_entry: unknown record type %d, skipping\n", id);
286 }
287 if (bs > jd->bufsize) {
288 void *n;
289 n = realloc(jd->buf, bs);
290 if (!n)
291 return NULL;
292 jd->buf = n;
293 jd->bufsize = bs;
294 }
295
296 addr = ((void *)jd->buf) + sizeof(*prefix);
297
298 ret = fread(addr, bs - sizeof(*prefix), 1, jd->in);
299 if (ret != 1)
300 return NULL;
301
302 jr = (union jr_entry *)jd->buf;
303
304 switch(id) {
305 case JIT_CODE_DEBUG_INFO:
306 if (jd->needs_bswap) {
307 uint64_t n;
308 jr->info.code_addr = bswap_64(jr->info.code_addr);
309 jr->info.nr_entry = bswap_64(jr->info.nr_entry);
310 for (n = 0 ; n < jr->info.nr_entry; n++) {
311 jr->info.entries[n].addr = bswap_64(jr->info.entries[n].addr);
312 jr->info.entries[n].lineno = bswap_32(jr->info.entries[n].lineno);
313 jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim);
314 }
315 }
316 break;
317 case JIT_CODE_UNWINDING_INFO:
318 if (jd->needs_bswap) {
319 jr->unwinding.unwinding_size = bswap_64(jr->unwinding.unwinding_size);
320 jr->unwinding.eh_frame_hdr_size = bswap_64(jr->unwinding.eh_frame_hdr_size);
321 jr->unwinding.mapped_size = bswap_64(jr->unwinding.mapped_size);
322 }
323 break;
324 case JIT_CODE_CLOSE:
325 break;
326 case JIT_CODE_LOAD:
327 if (jd->needs_bswap) {
328 jr->load.pid = bswap_32(jr->load.pid);
329 jr->load.tid = bswap_32(jr->load.tid);
330 jr->load.vma = bswap_64(jr->load.vma);
331 jr->load.code_addr = bswap_64(jr->load.code_addr);
332 jr->load.code_size = bswap_64(jr->load.code_size);
333 jr->load.code_index= bswap_64(jr->load.code_index);
334 }
335 jd->code_load_count++;
336 break;
337 case JIT_CODE_MOVE:
338 if (jd->needs_bswap) {
339 jr->move.pid = bswap_32(jr->move.pid);
340 jr->move.tid = bswap_32(jr->move.tid);
341 jr->move.vma = bswap_64(jr->move.vma);
342 jr->move.old_code_addr = bswap_64(jr->move.old_code_addr);
343 jr->move.new_code_addr = bswap_64(jr->move.new_code_addr);
344 jr->move.code_size = bswap_64(jr->move.code_size);
345 jr->move.code_index = bswap_64(jr->move.code_index);
346 }
347 break;
348 case JIT_CODE_MAX:
349 default:
350 /* skip unknown record (we have read them) */
351 break;
352 }
353 return jr;
354 }
355
356 static int
357 jit_inject_event(struct jit_buf_desc *jd, union perf_event *event)
358 {
359 ssize_t size;
360
361 size = perf_data__write(jd->output, event, event->header.size);
362 if (size < 0)
363 return -1;
364
365 jd->bytes_written += size;
366 return 0;
367 }
368
369 static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp)
370 {
371 struct perf_tsc_conversion tc;
372
373 if (!jd->use_arch_timestamp)
374 return timestamp;
375
376 tc.time_shift = jd->session->time_conv.time_shift;
377 tc.time_mult = jd->session->time_conv.time_mult;
378 tc.time_zero = jd->session->time_conv.time_zero;
379
380 if (!tc.time_mult)
381 return 0;
382
383 return tsc_to_perf_time(timestamp, &tc);
384 }
385
386 static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
387 {
388 struct perf_sample sample;
389 union perf_event *event;
390 struct perf_tool *tool = jd->session->tool;
391 uint64_t code, addr;
392 uintptr_t uaddr;
393 char *filename;
394 struct stat st;
395 size_t size;
396 u16 idr_size;
397 const char *sym;
398 uint32_t count;
399 int ret, csize, usize;
400 pid_t pid, tid;
401 struct {
402 u32 pid, tid;
403 u64 time;
404 } *id;
405
406 pid = jr->load.pid;
407 tid = jr->load.tid;
408 csize = jr->load.code_size;
409 usize = jd->unwinding_mapped_size;
410 addr = jr->load.code_addr;
411 sym = (void *)((unsigned long)jr + sizeof(jr->load));
412 code = (unsigned long)jr + jr->load.p.total_size - csize;
413 count = jr->load.code_index;
414 idr_size = jd->machine->id_hdr_size;
415
416 event = calloc(1, sizeof(*event) + idr_size);
417 if (!event)
418 return -1;
419
420 filename = event->mmap2.filename;
421 size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so",
422 jd->dir,
423 pid,
424 count);
425
426 size++; /* for \0 */
427
428 size = PERF_ALIGN(size, sizeof(u64));
429 uaddr = (uintptr_t)code;
430 ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries,
431 jd->unwinding_data, jd->eh_frame_hdr_size, jd->unwinding_size);
432
433 if (jd->debug_data && jd->nr_debug_entries) {
434 free(jd->debug_data);
435 jd->debug_data = NULL;
436 jd->nr_debug_entries = 0;
437 }
438
439 if (jd->unwinding_data && jd->eh_frame_hdr_size) {
440 free(jd->unwinding_data);
441 jd->unwinding_data = NULL;
442 jd->eh_frame_hdr_size = 0;
443 jd->unwinding_mapped_size = 0;
444 jd->unwinding_size = 0;
445 }
446
447 if (ret) {
448 free(event);
449 return -1;
450 }
451 if (stat(filename, &st))
452 memset(&st, 0, sizeof(st));
453
454 event->mmap2.header.type = PERF_RECORD_MMAP2;
455 event->mmap2.header.misc = PERF_RECORD_MISC_USER;
456 event->mmap2.header.size = (sizeof(event->mmap2) -
457 (sizeof(event->mmap2.filename) - size) + idr_size);
458
459 event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
460 event->mmap2.start = addr;
461 event->mmap2.len = usize ? ALIGN_8(csize) + usize : csize;
462 event->mmap2.pid = pid;
463 event->mmap2.tid = tid;
464 event->mmap2.ino = st.st_ino;
465 event->mmap2.maj = major(st.st_dev);
466 event->mmap2.min = minor(st.st_dev);
467 event->mmap2.prot = st.st_mode;
468 event->mmap2.flags = MAP_SHARED;
469 event->mmap2.ino_generation = 1;
470
471 id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
472 if (jd->sample_type & PERF_SAMPLE_TID) {
473 id->pid = pid;
474 id->tid = tid;
475 }
476 if (jd->sample_type & PERF_SAMPLE_TIME)
477 id->time = convert_timestamp(jd, jr->load.p.timestamp);
478
479 /*
480 * create pseudo sample to induce dso hit increment
481 * use first address as sample address
482 */
483 memset(&sample, 0, sizeof(sample));
484 sample.cpumode = PERF_RECORD_MISC_USER;
485 sample.pid = pid;
486 sample.tid = tid;
487 sample.time = id->time;
488 sample.ip = addr;
489
490 ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
491 if (ret)
492 return ret;
493
494 ret = jit_inject_event(jd, event);
495 /*
496 * mark dso as use to generate buildid in the header
497 */
498 if (!ret)
499 build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
500
501 return ret;
502 }
503
504 static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr)
505 {
506 struct perf_sample sample;
507 union perf_event *event;
508 struct perf_tool *tool = jd->session->tool;
509 char *filename;
510 size_t size;
511 struct stat st;
512 int usize;
513 u16 idr_size;
514 int ret;
515 pid_t pid, tid;
516 struct {
517 u32 pid, tid;
518 u64 time;
519 } *id;
520
521 pid = jr->move.pid;
522 tid = jr->move.tid;
523 usize = jd->unwinding_mapped_size;
524 idr_size = jd->machine->id_hdr_size;
525
526 /*
527 * +16 to account for sample_id_all (hack)
528 */
529 event = calloc(1, sizeof(*event) + 16);
530 if (!event)
531 return -1;
532
533 filename = event->mmap2.filename;
534 size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64,
535 jd->dir,
536 pid,
537 jr->move.code_index);
538
539 size++; /* for \0 */
540
541 if (stat(filename, &st))
542 memset(&st, 0, sizeof(st));
543
544 size = PERF_ALIGN(size, sizeof(u64));
545
546 event->mmap2.header.type = PERF_RECORD_MMAP2;
547 event->mmap2.header.misc = PERF_RECORD_MISC_USER;
548 event->mmap2.header.size = (sizeof(event->mmap2) -
549 (sizeof(event->mmap2.filename) - size) + idr_size);
550 event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
551 event->mmap2.start = jr->move.new_code_addr;
552 event->mmap2.len = usize ? ALIGN_8(jr->move.code_size) + usize
553 : jr->move.code_size;
554 event->mmap2.pid = pid;
555 event->mmap2.tid = tid;
556 event->mmap2.ino = st.st_ino;
557 event->mmap2.maj = major(st.st_dev);
558 event->mmap2.min = minor(st.st_dev);
559 event->mmap2.prot = st.st_mode;
560 event->mmap2.flags = MAP_SHARED;
561 event->mmap2.ino_generation = 1;
562
563 id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
564 if (jd->sample_type & PERF_SAMPLE_TID) {
565 id->pid = pid;
566 id->tid = tid;
567 }
568 if (jd->sample_type & PERF_SAMPLE_TIME)
569 id->time = convert_timestamp(jd, jr->load.p.timestamp);
570
571 /*
572 * create pseudo sample to induce dso hit increment
573 * use first address as sample address
574 */
575 memset(&sample, 0, sizeof(sample));
576 sample.cpumode = PERF_RECORD_MISC_USER;
577 sample.pid = pid;
578 sample.tid = tid;
579 sample.time = id->time;
580 sample.ip = jr->move.new_code_addr;
581
582 ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
583 if (ret)
584 return ret;
585
586 ret = jit_inject_event(jd, event);
587 if (!ret)
588 build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
589
590 return ret;
591 }
592
593 static int jit_repipe_debug_info(struct jit_buf_desc *jd, union jr_entry *jr)
594 {
595 void *data;
596 size_t sz;
597
598 if (!(jd && jr))
599 return -1;
600
601 sz = jr->prefix.total_size - sizeof(jr->info);
602 data = malloc(sz);
603 if (!data)
604 return -1;
605
606 memcpy(data, &jr->info.entries, sz);
607
608 jd->debug_data = data;
609
610 /*
611 * we must use nr_entry instead of size here because
612 * we cannot distinguish actual entry from padding otherwise
613 */
614 jd->nr_debug_entries = jr->info.nr_entry;
615
616 return 0;
617 }
618
619 static int
620 jit_repipe_unwinding_info(struct jit_buf_desc *jd, union jr_entry *jr)
621 {
622 void *unwinding_data;
623 uint32_t unwinding_data_size;
624
625 if (!(jd && jr))
626 return -1;
627
628 unwinding_data_size = jr->prefix.total_size - sizeof(jr->unwinding);
629 unwinding_data = malloc(unwinding_data_size);
630 if (!unwinding_data)
631 return -1;
632
633 memcpy(unwinding_data, &jr->unwinding.unwinding_data,
634 unwinding_data_size);
635
636 jd->eh_frame_hdr_size = jr->unwinding.eh_frame_hdr_size;
637 jd->unwinding_size = jr->unwinding.unwinding_size;
638 jd->unwinding_mapped_size = jr->unwinding.mapped_size;
639 jd->unwinding_data = unwinding_data;
640
641 return 0;
642 }
643
644 static int
645 jit_process_dump(struct jit_buf_desc *jd)
646 {
647 union jr_entry *jr;
648 int ret = 0;
649
650 while ((jr = jit_get_next_entry(jd))) {
651 switch(jr->prefix.id) {
652 case JIT_CODE_LOAD:
653 ret = jit_repipe_code_load(jd, jr);
654 break;
655 case JIT_CODE_MOVE:
656 ret = jit_repipe_code_move(jd, jr);
657 break;
658 case JIT_CODE_DEBUG_INFO:
659 ret = jit_repipe_debug_info(jd, jr);
660 break;
661 case JIT_CODE_UNWINDING_INFO:
662 ret = jit_repipe_unwinding_info(jd, jr);
663 break;
664 default:
665 ret = 0;
666 continue;
667 }
668 }
669 return ret;
670 }
671
672 static int
673 jit_inject(struct jit_buf_desc *jd, char *path)
674 {
675 int ret;
676
677 if (verbose > 0)
678 fprintf(stderr, "injecting: %s\n", path);
679
680 ret = jit_open(jd, path);
681 if (ret)
682 return -1;
683
684 ret = jit_process_dump(jd);
685
686 jit_close(jd);
687
688 if (verbose > 0)
689 fprintf(stderr, "injected: %s (%d)\n", path, ret);
690
691 return 0;
692 }
693
694 /*
695 * File must be with pattern .../jit-XXXX.dump
696 * where XXXX is the PID of the process which did the mmap()
697 * as captured in the RECORD_MMAP record
698 */
699 static int
700 jit_detect(char *mmap_name, pid_t pid)
701 {
702 char *p;
703 char *end = NULL;
704 pid_t pid2;
705
706 if (verbose > 2)
707 fprintf(stderr, "jit marker trying : %s\n", mmap_name);
708 /*
709 * get file name
710 */
711 p = strrchr(mmap_name, '/');
712 if (!p)
713 return -1;
714
715 /*
716 * match prefix
717 */
718 if (strncmp(p, "/jit-", 5))
719 return -1;
720
721 /*
722 * skip prefix
723 */
724 p += 5;
725
726 /*
727 * must be followed by a pid
728 */
729 if (!isdigit(*p))
730 return -1;
731
732 pid2 = (int)strtol(p, &end, 10);
733 if (!end)
734 return -1;
735
736 /*
737 * pid does not match mmap pid
738 * pid==0 in system-wide mode (synthesized)
739 */
740 if (pid && pid2 != pid)
741 return -1;
742 /*
743 * validate suffix
744 */
745 if (strcmp(end, ".dump"))
746 return -1;
747
748 if (verbose > 0)
749 fprintf(stderr, "jit marker found: %s\n", mmap_name);
750
751 return 0;
752 }
753
754 int
755 jit_process(struct perf_session *session,
756 struct perf_data *output,
757 struct machine *machine,
758 char *filename,
759 pid_t pid,
760 u64 *nbytes)
761 {
762 struct perf_evsel *first;
763 struct jit_buf_desc jd;
764 int ret;
765
766 /*
767 * first, detect marker mmap (i.e., the jitdump mmap)
768 */
769 if (jit_detect(filename, pid))
770 return 0;
771
772 memset(&jd, 0, sizeof(jd));
773
774 jd.session = session;
775 jd.output = output;
776 jd.machine = machine;
777
778 /*
779 * track sample_type to compute id_all layout
780 * perf sets the same sample type to all events as of now
781 */
782 first = perf_evlist__first(session->evlist);
783 jd.sample_type = first->attr.sample_type;
784
785 *nbytes = 0;
786
787 ret = jit_inject(&jd, filename);
788 if (!ret) {
789 *nbytes = jd.bytes_written;
790 ret = 1;
791 }
792
793 return ret;
794 }
Linux with added FPC-III support