Kernel dump for arm, ripped from the ia64/amd64 version.
This commit is contained in:
Olivier Houchard
parent
33812c066d
commit
f7a1a1e2e5
@ -1,29 +1,27 @@
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/*-
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* Copyright (c) 2004 Olivier Houchard
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* Copyright (c) 2002 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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@ -34,12 +32,352 @@ __FBSDID("$FreeBSD$");
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/kerneldump.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/elf.h>
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#include <machine/md_var.h>
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#include <machine/pcb.h>
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#include <machine/armreg.h>
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CTASSERT(sizeof(struct kerneldumpheader) == 512);
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/*
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* Don't touch the first SIZEOF_METADATA bytes on the dump device. This
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* is to protect us from metadata and to protect metadata from us.
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*/
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#define SIZEOF_METADATA (64*1024)
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#define MD_ALIGN(x) (((off_t)(x) + PAGE_MASK) & ~PAGE_MASK)
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#define DEV_ALIGN(x) (((off_t)(x) + (DEV_BSIZE-1)) & ~(DEV_BSIZE-1))
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extern struct pcb dumppcb;
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struct md_pa {
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vm_paddr_t md_start;
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vm_paddr_t md_size;
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};
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typedef int callback_t(struct md_pa *, int, void *);
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static struct kerneldumpheader kdh;
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static off_t dumplo, fileofs;
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/* Handle buffered writes. */
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static char buffer[DEV_BSIZE];
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static size_t fragsz;
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/* XXX: I suppose 20 should be enough. */
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static struct md_pa dump_map[20];
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static void
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md_pa_init(void)
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{
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int n, idx;
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bzero(dump_map, sizeof(dump_map));
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for (n = 0; n < sizeof(dump_map) / sizeof(dump_map[0]); n++) {
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idx = n * 2;
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if (dump_avail[idx] == 0 && dump_avail[idx + 1] == 0)
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break;
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dump_map[n].md_start = dump_avail[idx];
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dump_map[n].md_size = dump_avail[idx + 1] - dump_avail[idx];
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}
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}
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static struct md_pa *
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md_pa_first(void)
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{
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return (&dump_map[0]);
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}
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static struct md_pa *
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md_pa_next(struct md_pa *mdp)
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{
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mdp++;
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if (mdp->md_size == 0)
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mdp = NULL;
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return (mdp);
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}
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/* XXX should be MI */
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static void
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mkdumpheader(struct kerneldumpheader *kdh, uint32_t archver, uint64_t dumplen,
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uint32_t blksz)
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{
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bzero(kdh, sizeof(*kdh));
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strncpy(kdh->magic, KERNELDUMPMAGIC, sizeof(kdh->magic));
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strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture));
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kdh->version = htod32(KERNELDUMPVERSION);
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kdh->architectureversion = htod32(archver);
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kdh->dumplength = htod64(dumplen);
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kdh->dumptime = htod64(time_second);
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kdh->blocksize = htod32(blksz);
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strncpy(kdh->hostname, hostname, sizeof(kdh->hostname));
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strncpy(kdh->versionstring, version, sizeof(kdh->versionstring));
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if (panicstr != NULL)
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strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring));
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kdh->parity = kerneldump_parity(kdh);
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}
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static int
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buf_write(struct dumperinfo *di, char *ptr, size_t sz)
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{
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size_t len;
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int error;
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while (sz) {
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len = DEV_BSIZE - fragsz;
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if (len > sz)
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len = sz;
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bcopy(ptr, buffer + fragsz, len);
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fragsz += len;
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ptr += len;
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sz -= len;
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if (fragsz == DEV_BSIZE) {
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error = di->dumper(di->priv, buffer, 0, dumplo,
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DEV_BSIZE);
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if (error)
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return error;
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dumplo += DEV_BSIZE;
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fragsz = 0;
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}
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}
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return (0);
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}
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static int
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buf_flush(struct dumperinfo *di)
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{
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int error;
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if (fragsz == 0)
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return (0);
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error = di->dumper(di->priv, buffer, 0, dumplo, DEV_BSIZE);
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dumplo += DEV_BSIZE;
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fragsz = 0;
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return (error);
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}
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extern vm_offset_t kernel_l1kva;
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extern char *pouet2;
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static int
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cb_dumpdata(struct md_pa *mdp, int seqnr, void *arg)
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{
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struct dumperinfo *di = (struct dumperinfo*)arg;
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vm_paddr_t pa;
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vm_offset_t va;
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uint32_t pgs;
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size_t counter, sz, chunk;
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int c, error, twiddle;
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error = 0; /* catch case in which chunk size is 0 */
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counter = 0; /* Update twiddle every 16MB */
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twiddle = 0;
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va = 0;
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pgs = mdp->md_size / PAGE_SIZE;
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pa = mdp->md_start;
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printf(" chunk %d: %dMB (%d pages)", seqnr, pgs * PAGE_SIZE / (
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1024*1024), pgs);
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/* Make sure we write coherent datas. */
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cpu_idcache_wbinv_all();
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#ifdef __XSCALE__
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xscale_cache_clean_minidata();
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#endif
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while (pgs) {
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chunk = pgs;
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if (chunk > MAXDUMPPGS)
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chunk = MAXDUMPPGS;
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sz = chunk << PAGE_SHIFT;
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counter += sz;
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if (counter >> 24) {
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printf(" %d", pgs * PAGE_SIZE);
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counter &= (1<<24) - 1;
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}
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if (pa == (pa & L1_ADDR_BITS)) {
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pmap_kenter_section(0, pa & L1_ADDR_BITS, 0);
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cpu_tlb_flushID_SE(0);
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cpu_cpwait();
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}
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error = di->dumper(di->priv,
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(void *)(pa - (pa & L1_ADDR_BITS)),0, dumplo, sz);
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if (error)
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break;
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dumplo += sz;
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pgs -= chunk;
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pa += sz;
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/* Check for user abort. */
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c = cncheckc();
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if (c == 0x03)
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return (ECANCELED);
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if (c != -1)
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printf(" (CTRL-C to abort) ");
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}
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printf(" ... %s\n", (error) ? "fail" : "ok");
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return (error);
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}
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static int
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cb_dumphdr(struct md_pa *mdp, int seqnr, void *arg)
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{
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struct dumperinfo *di = (struct dumperinfo*)arg;
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Elf_Phdr phdr;
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uint64_t size;
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int error;
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size = mdp->md_size;
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bzero(&phdr, sizeof(phdr));
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phdr.p_type = PT_LOAD;
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phdr.p_flags = PF_R; /* XXX */
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phdr.p_offset = fileofs;
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phdr.p_vaddr = mdp->md_start;
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phdr.p_paddr = mdp->md_start;
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phdr.p_filesz = size;
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phdr.p_memsz = size;
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phdr.p_align = PAGE_SIZE;
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error = buf_write(di, (char*)&phdr, sizeof(phdr));
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fileofs += phdr.p_filesz;
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return (error);
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}
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static int
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cb_size(struct md_pa *mdp, int seqnr, void *arg)
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{
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uint32_t *sz = (uint32_t*)arg;
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*sz += (uint32_t)mdp->md_size;
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return (0);
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}
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static int
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foreach_chunk(callback_t cb, void *arg)
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{
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struct md_pa *mdp;
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int error, seqnr;
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seqnr = 0;
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mdp = md_pa_first();
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while (mdp != NULL) {
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error = (*cb)(mdp, seqnr++, arg);
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if (error)
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return (-error);
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mdp = md_pa_next(mdp);
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}
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return (seqnr);
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}
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void
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dumpsys(struct dumperinfo *di)
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{
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Elf_Ehdr ehdr;
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uint32_t dumpsize;
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off_t hdrgap;
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size_t hdrsz;
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int error;
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bzero(&ehdr, sizeof(ehdr));
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ehdr.e_ident[EI_MAG0] = ELFMAG0;
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ehdr.e_ident[EI_MAG1] = ELFMAG1;
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ehdr.e_ident[EI_MAG2] = ELFMAG2;
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ehdr.e_ident[EI_MAG3] = ELFMAG3;
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ehdr.e_ident[EI_CLASS] = ELF_CLASS;
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#if BYTE_ORDER == LITTLE_ENDIAN
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ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
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#else
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ehdr.e_ident[EI_DATA] = ELFDATA2MSB;
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#endif
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ehdr.e_ident[EI_VERSION] = EV_CURRENT;
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ehdr.e_ident[EI_OSABI] = ELFOSABI_STANDALONE; /* XXX big picture? */
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ehdr.e_type = ET_CORE;
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ehdr.e_machine = EM_ARM;
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ehdr.e_phoff = sizeof(ehdr);
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ehdr.e_flags = 0;
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ehdr.e_ehsize = sizeof(ehdr);
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ehdr.e_phentsize = sizeof(Elf_Phdr);
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ehdr.e_shentsize = sizeof(Elf_Shdr);
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md_pa_init();
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/* Calculate dump size. */
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dumpsize = 0L;
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ehdr.e_phnum = foreach_chunk(cb_size, &dumpsize);
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hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize;
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fileofs = MD_ALIGN(hdrsz);
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dumpsize += fileofs;
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hdrgap = fileofs - DEV_ALIGN(hdrsz);
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/* Determine dump offset on device. */
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if (di->mediasize < SIZEOF_METADATA + dumpsize + sizeof(kdh) * 2) {
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error = ENOSPC;
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goto fail;
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}
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dumplo = di->mediaoffset + di->mediasize - dumpsize;
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dumplo -= sizeof(kdh) * 2;
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mkdumpheader(&kdh, KERNELDUMP_ARM_VERSION, dumpsize, di->blocksize);
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printf("Dumping %llu MB (%d chunks)\n", (long long)dumpsize >> 20,
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ehdr.e_phnum);
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/* Dump leader */
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error = di->dumper(di->priv, &kdh, 0, dumplo, sizeof(kdh));
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if (error)
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goto fail;
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dumplo += sizeof(kdh);
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/* Dump ELF header */
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error = buf_write(di, (char*)&ehdr, sizeof(ehdr));
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if (error)
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goto fail;
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/* Dump program headers */
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error = foreach_chunk(cb_dumphdr, di);
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if (error < 0)
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goto fail;
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buf_flush(di);
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/*
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* All headers are written using blocked I/O, so we know the
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* current offset is (still) block aligned. Skip the alignement
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* in the file to have the segment contents aligned at page
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* boundary. We cannot use MD_ALIGN on dumplo, because we don't
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* care and may very well be unaligned within the dump device.
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*/
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dumplo += hdrgap;
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/* Dump memory chunks (updates dumplo) */
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error = foreach_chunk(cb_dumpdata, di);
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if (error < 0)
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goto fail;
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/* Dump trailer */
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error = di->dumper(di->priv, &kdh, 0, dumplo, sizeof(kdh));
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if (error)
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goto fail;
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/* Signal completion, signoff and exit stage left. */
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di->dumper(di->priv, NULL, 0, 0, 0);
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printf("\nDump complete\n");
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return;
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fail:
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if (error < 0)
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error = -error;
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if (error == ECANCELED)
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printf("\nDump aborted\n");
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else if (error == ENOSPC)
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printf("\nDump failed. Partition too small.\n");
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else
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printf("\n** DUMP FAILED (ERROR %d) **\n", error);
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}
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Block a user