2 * Copyright (c) 2002 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <sys/kernel.h>
36 #include <sys/kerneldump.h>
37 #include <sys/watchdog.h>
39 #include <vm/vm_param.h>
40 #include <vm/vm_page.h>
41 #include <vm/vm_phys.h>
42 #include <vm/vm_dumpset.h>
44 #include <machine/dump.h>
45 #include <machine/elf.h>
46 #include <machine/md_var.h>
47 #include <machine/pcb.h>
49 CTASSERT(sizeof(struct kerneldumpheader) == 512);
51 #define MD_ALIGN(x) roundup2((off_t)(x), PAGE_SIZE)
53 /* Handle buffered writes. */
56 struct dump_pa dump_map[DUMPSYS_MD_PA_NPAIRS];
58 #if !defined(__powerpc__)
60 dumpsys_gen_pa_init(void)
64 bzero(dump_map, sizeof(dump_map));
65 for (n = 0; n < nitems(dump_map); n++) {
67 if (dump_avail[idx] == 0 && dump_avail[idx + 1] == 0)
69 dump_map[n].pa_start = dump_avail[idx];
70 dump_map[n].pa_size = dump_avail[idx + 1] - dump_avail[idx];
76 dumpsys_gen_pa_next(struct dump_pa *mdp)
80 return (&dump_map[0]);
83 if (mdp->pa_size == 0)
89 dumpsys_gen_wbinv_all(void)
95 dumpsys_gen_unmap_chunk(vm_paddr_t pa __unused, size_t chunk __unused,
102 dumpsys_gen_write_aux_headers(struct dumperinfo *di)
109 dumpsys_buf_seek(struct dumperinfo *di, size_t sz)
111 static uint8_t buf[DEV_BSIZE];
115 bzero(buf, sizeof(buf));
118 nbytes = MIN(sz, sizeof(buf));
120 error = dump_append(di, buf, 0, nbytes);
130 dumpsys_buf_write(struct dumperinfo *di, char *ptr, size_t sz)
136 len = di->blocksize - fragsz;
139 memcpy((char *)di->blockbuf + fragsz, ptr, len);
143 if (fragsz == di->blocksize) {
144 error = dump_append(di, di->blockbuf, 0, di->blocksize);
154 dumpsys_buf_flush(struct dumperinfo *di)
161 error = dump_append(di, di->blockbuf, 0, di->blocksize);
166 CTASSERT(PAGE_SHIFT < 20);
167 #define PG2MB(pgs) ((pgs + (1 << (20 - PAGE_SHIFT)) - 1) >> (20 - PAGE_SHIFT))
170 dumpsys_cb_dumpdata(struct dump_pa *mdp, int seqnr, void *arg)
172 struct dumperinfo *di = (struct dumperinfo*)arg;
176 size_t counter, sz, chunk;
180 error = 0; /* catch case in which chunk size is 0 */
181 counter = 0; /* Update twiddle every 16MB */
183 pgs = mdp->pa_size / PAGE_SIZE;
185 maxdumppgs = min(di->maxiosize / PAGE_SIZE, MAXDUMPPGS);
186 if (maxdumppgs == 0) /* seatbelt */
189 printf(" chunk %d: %juMB (%ju pages)", seqnr, (uintmax_t)PG2MB(pgs),
195 if (chunk > maxdumppgs)
197 sz = chunk << PAGE_SHIFT;
200 printf(" %ju", (uintmax_t)PG2MB(pgs));
201 counter &= (1 << 24) - 1;
204 dumpsys_map_chunk(pa, chunk, &va);
205 wdog_kern_pat(WD_LASTVAL);
207 error = dump_append(di, va, 0, sz);
208 dumpsys_unmap_chunk(pa, chunk, va);
214 /* Check for user abort. */
219 printf(" (CTRL-C to abort) ");
221 printf(" ... %s\n", (error) ? "fail" : "ok");
226 dumpsys_foreach_chunk(dumpsys_callback_t cb, void *arg)
232 mdp = dumpsys_pa_next(NULL);
233 while (mdp != NULL) {
234 error = (*cb)(mdp, seqnr++, arg);
237 mdp = dumpsys_pa_next(mdp);
242 static off_t fileofs;
245 cb_dumphdr(struct dump_pa *mdp, int seqnr, void *arg)
247 struct dumperinfo *di = (struct dumperinfo*)arg;
253 bzero(&phdr, sizeof(phdr));
254 phdr.p_type = PT_LOAD;
255 phdr.p_flags = PF_R; /* XXX */
256 phdr.p_offset = fileofs;
258 phdr.p_vaddr = (do_minidump? mdp->pa_start : ~0L);
259 phdr.p_paddr = (do_minidump? ~0L : mdp->pa_start);
261 phdr.p_vaddr = mdp->pa_start;
262 phdr.p_paddr = mdp->pa_start;
264 phdr.p_filesz = size;
266 phdr.p_align = PAGE_SIZE;
268 error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr));
269 fileofs += phdr.p_filesz;
274 cb_size(struct dump_pa *mdp, int seqnr, void *arg)
278 sz = (uint64_t *)arg;
279 *sz += (uint64_t)mdp->pa_size;
284 dumpsys_generic(struct dumperinfo *di)
286 static struct kerneldumpheader kdh;
293 #if !defined(__powerpc__) || defined(__powerpc64__)
295 return (minidumpsys(di));
298 bzero(&ehdr, sizeof(ehdr));
299 ehdr.e_ident[EI_MAG0] = ELFMAG0;
300 ehdr.e_ident[EI_MAG1] = ELFMAG1;
301 ehdr.e_ident[EI_MAG2] = ELFMAG2;
302 ehdr.e_ident[EI_MAG3] = ELFMAG3;
303 ehdr.e_ident[EI_CLASS] = ELF_CLASS;
304 #if BYTE_ORDER == LITTLE_ENDIAN
305 ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
307 ehdr.e_ident[EI_DATA] = ELFDATA2MSB;
309 ehdr.e_ident[EI_VERSION] = EV_CURRENT;
310 ehdr.e_ident[EI_OSABI] = ELFOSABI_STANDALONE; /* XXX big picture? */
311 ehdr.e_type = ET_CORE;
312 ehdr.e_machine = EM_VALUE;
313 ehdr.e_phoff = sizeof(ehdr);
315 ehdr.e_ehsize = sizeof(ehdr);
316 ehdr.e_phentsize = sizeof(Elf_Phdr);
317 ehdr.e_shentsize = sizeof(Elf_Shdr);
321 /* Calculate dump size. */
323 ehdr.e_phnum = dumpsys_foreach_chunk(cb_size, &dumpsize) +
324 DUMPSYS_NUM_AUX_HDRS;
325 hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize;
326 fileofs = MD_ALIGN(hdrsz);
328 hdrgap = fileofs - roundup2((off_t)hdrsz, di->blocksize);
330 dump_init_header(di, &kdh, KERNELDUMPMAGIC, KERNELDUMP_ARCH_VERSION,
333 error = dump_start(di, &kdh);
337 printf("Dumping %ju MB (%d chunks)\n", (uintmax_t)dumpsize >> 20,
338 ehdr.e_phnum - DUMPSYS_NUM_AUX_HDRS);
340 /* Dump ELF header */
341 error = dumpsys_buf_write(di, (char*)&ehdr, sizeof(ehdr));
345 /* Dump program headers */
346 error = dumpsys_foreach_chunk(cb_dumphdr, di);
349 error = dumpsys_write_aux_headers(di);
352 dumpsys_buf_flush(di);
355 * All headers are written using blocked I/O, so we know the
356 * current offset is (still) block aligned. Skip the alignement
357 * in the file to have the segment contents aligned at page
360 error = dumpsys_buf_seek(di, (size_t)hdrgap);
364 /* Dump memory chunks. */
365 error = dumpsys_foreach_chunk(dumpsys_cb_dumpdata, di);
369 error = dump_finish(di, &kdh);
373 printf("\nDump complete\n");
380 if (error == ECANCELED)
381 printf("\nDump aborted\n");
382 else if (error == E2BIG || error == ENOSPC)
383 printf("\nDump failed. Partition too small.\n");
385 printf("\n** DUMP FAILED (ERROR %d) **\n", error);