diff options
author | cognet <cognet@FreeBSD.org> | 2005-10-03 14:05:03 +0000 |
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committer | cognet <cognet@FreeBSD.org> | 2005-10-03 14:05:03 +0000 |
commit | 1b8bcb97f0c240d85dd7f58e1ce2123b9cfe6232 (patch) | |
tree | 08927a3813f9adc86cdcd45b0acfed904ca7eef5 /sys | |
parent | 9e9bb7c93583404b33bc79d1e22137c8ac58afe2 (diff) | |
download | FreeBSD-src-1b8bcb97f0c240d85dd7f58e1ce2123b9cfe6232.zip FreeBSD-src-1b8bcb97f0c240d85dd7f58e1ce2123b9cfe6232.tar.gz |
Kernel dump for arm, ripped from the ia64/amd64 version.
Diffstat (limited to 'sys')
-rw-r--r-- | sys/arm/arm/dump_machdep.c | 368 |
1 files changed, 353 insertions, 15 deletions
diff --git a/sys/arm/arm/dump_machdep.c b/sys/arm/arm/dump_machdep.c index 38841e4..1ad4335 100644 --- a/sys/arm/arm/dump_machdep.c +++ b/sys/arm/arm/dump_machdep.c @@ -1,29 +1,27 @@ /*- - * Copyright (c) 2004 Olivier Houchard + * Copyright (c) 2002 Marcel Moolenaar * All rights reserved. * + * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: + * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 3. The names of the authors may not be used to endorse or promote - * products derived from this software without specific prior written - * permission. * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> @@ -34,12 +32,352 @@ __FBSDID("$FreeBSD$"); #include <sys/conf.h> #include <sys/cons.h> #include <sys/kernel.h> +#include <sys/proc.h> #include <sys/kerneldump.h> #include <vm/vm.h> #include <vm/pmap.h> +#include <machine/elf.h> #include <machine/md_var.h> +#include <machine/pcb.h> +#include <machine/armreg.h> + +CTASSERT(sizeof(struct kerneldumpheader) == 512); + +/* + * Don't touch the first SIZEOF_METADATA bytes on the dump device. This + * is to protect us from metadata and to protect metadata from us. + */ +#define SIZEOF_METADATA (64*1024) + +#define MD_ALIGN(x) (((off_t)(x) + PAGE_MASK) & ~PAGE_MASK) +#define DEV_ALIGN(x) (((off_t)(x) + (DEV_BSIZE-1)) & ~(DEV_BSIZE-1)) +extern struct pcb dumppcb; + +struct md_pa { + vm_paddr_t md_start; + vm_paddr_t md_size; +}; + +typedef int callback_t(struct md_pa *, int, void *); + +static struct kerneldumpheader kdh; +static off_t dumplo, fileofs; + +/* Handle buffered writes. */ +static char buffer[DEV_BSIZE]; +static size_t fragsz; + +/* XXX: I suppose 20 should be enough. */ +static struct md_pa dump_map[20]; + +static void +md_pa_init(void) +{ + int n, idx; + + bzero(dump_map, sizeof(dump_map)); + for (n = 0; n < sizeof(dump_map) / sizeof(dump_map[0]); n++) { + idx = n * 2; + if (dump_avail[idx] == 0 && dump_avail[idx + 1] == 0) + break; + dump_map[n].md_start = dump_avail[idx]; + dump_map[n].md_size = dump_avail[idx + 1] - dump_avail[idx]; + } +} + +static struct md_pa * +md_pa_first(void) +{ + + return (&dump_map[0]); +} + +static struct md_pa * +md_pa_next(struct md_pa *mdp) +{ + + mdp++; + if (mdp->md_size == 0) + mdp = NULL; + return (mdp); +} + +/* XXX should be MI */ +static void +mkdumpheader(struct kerneldumpheader *kdh, uint32_t archver, uint64_t dumplen, + uint32_t blksz) +{ + + bzero(kdh, sizeof(*kdh)); + strncpy(kdh->magic, KERNELDUMPMAGIC, sizeof(kdh->magic)); + strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture)); + kdh->version = htod32(KERNELDUMPVERSION); + kdh->architectureversion = htod32(archver); + kdh->dumplength = htod64(dumplen); + kdh->dumptime = htod64(time_second); + kdh->blocksize = htod32(blksz); + strncpy(kdh->hostname, hostname, sizeof(kdh->hostname)); + strncpy(kdh->versionstring, version, sizeof(kdh->versionstring)); + if (panicstr != NULL) + strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring)); + kdh->parity = kerneldump_parity(kdh); +} + +static int +buf_write(struct dumperinfo *di, char *ptr, size_t sz) +{ + size_t len; + int error; + + while (sz) { + len = DEV_BSIZE - fragsz; + if (len > sz) + len = sz; + bcopy(ptr, buffer + fragsz, len); + fragsz += len; + ptr += len; + sz -= len; + if (fragsz == DEV_BSIZE) { + error = di->dumper(di->priv, buffer, 0, dumplo, + DEV_BSIZE); + if (error) + return error; + dumplo += DEV_BSIZE; + fragsz = 0; + } + } + + return (0); +} + +static int +buf_flush(struct dumperinfo *di) +{ + int error; + + if (fragsz == 0) + return (0); + + error = di->dumper(di->priv, buffer, 0, dumplo, DEV_BSIZE); + dumplo += DEV_BSIZE; + fragsz = 0; + return (error); +} + +extern vm_offset_t kernel_l1kva; +extern char *pouet2; + +static int +cb_dumpdata(struct md_pa *mdp, int seqnr, void *arg) +{ + struct dumperinfo *di = (struct dumperinfo*)arg; + vm_paddr_t pa; + vm_offset_t va; + uint32_t pgs; + size_t counter, sz, chunk; + int c, error, twiddle; + + error = 0; /* catch case in which chunk size is 0 */ + counter = 0; /* Update twiddle every 16MB */ + twiddle = 0; + va = 0; + pgs = mdp->md_size / PAGE_SIZE; + pa = mdp->md_start; + + printf(" chunk %d: %dMB (%d pages)", seqnr, pgs * PAGE_SIZE / ( + 1024*1024), pgs); + + /* Make sure we write coherent datas. */ + cpu_idcache_wbinv_all(); +#ifdef __XSCALE__ + xscale_cache_clean_minidata(); +#endif + while (pgs) { + chunk = pgs; + if (chunk > MAXDUMPPGS) + chunk = MAXDUMPPGS; + sz = chunk << PAGE_SHIFT; + counter += sz; + if (counter >> 24) { + printf(" %d", pgs * PAGE_SIZE); + counter &= (1<<24) - 1; + } + if (pa == (pa & L1_ADDR_BITS)) { + pmap_kenter_section(0, pa & L1_ADDR_BITS, 0); + cpu_tlb_flushID_SE(0); + cpu_cpwait(); + } + error = di->dumper(di->priv, + (void *)(pa - (pa & L1_ADDR_BITS)),0, dumplo, sz); + if (error) + break; + dumplo += sz; + pgs -= chunk; + pa += sz; + + /* Check for user abort. */ + c = cncheckc(); + if (c == 0x03) + return (ECANCELED); + if (c != -1) + printf(" (CTRL-C to abort) "); + } + printf(" ... %s\n", (error) ? "fail" : "ok"); + return (error); +} + +static int +cb_dumphdr(struct md_pa *mdp, int seqnr, void *arg) +{ + struct dumperinfo *di = (struct dumperinfo*)arg; + Elf_Phdr phdr; + uint64_t size; + int error; + + size = mdp->md_size; + bzero(&phdr, sizeof(phdr)); + phdr.p_type = PT_LOAD; + phdr.p_flags = PF_R; /* XXX */ + phdr.p_offset = fileofs; + phdr.p_vaddr = mdp->md_start; + phdr.p_paddr = mdp->md_start; + phdr.p_filesz = size; + phdr.p_memsz = size; + phdr.p_align = PAGE_SIZE; + + error = buf_write(di, (char*)&phdr, sizeof(phdr)); + fileofs += phdr.p_filesz; + return (error); +} + +static int +cb_size(struct md_pa *mdp, int seqnr, void *arg) +{ + uint32_t *sz = (uint32_t*)arg; + + *sz += (uint32_t)mdp->md_size; + return (0); +} + +static int +foreach_chunk(callback_t cb, void *arg) +{ + struct md_pa *mdp; + int error, seqnr; + + seqnr = 0; + mdp = md_pa_first(); + while (mdp != NULL) { + error = (*cb)(mdp, seqnr++, arg); + if (error) + return (-error); + mdp = md_pa_next(mdp); + } + return (seqnr); +} void dumpsys(struct dumperinfo *di) { + Elf_Ehdr ehdr; + uint32_t dumpsize; + off_t hdrgap; + size_t hdrsz; + int error; + + bzero(&ehdr, sizeof(ehdr)); + ehdr.e_ident[EI_MAG0] = ELFMAG0; + ehdr.e_ident[EI_MAG1] = ELFMAG1; + ehdr.e_ident[EI_MAG2] = ELFMAG2; + ehdr.e_ident[EI_MAG3] = ELFMAG3; + ehdr.e_ident[EI_CLASS] = ELF_CLASS; +#if BYTE_ORDER == LITTLE_ENDIAN + ehdr.e_ident[EI_DATA] = ELFDATA2LSB; +#else + ehdr.e_ident[EI_DATA] = ELFDATA2MSB; +#endif + ehdr.e_ident[EI_VERSION] = EV_CURRENT; + ehdr.e_ident[EI_OSABI] = ELFOSABI_STANDALONE; /* XXX big picture? */ + ehdr.e_type = ET_CORE; + ehdr.e_machine = EM_ARM; + ehdr.e_phoff = sizeof(ehdr); + ehdr.e_flags = 0; + ehdr.e_ehsize = sizeof(ehdr); + ehdr.e_phentsize = sizeof(Elf_Phdr); + ehdr.e_shentsize = sizeof(Elf_Shdr); + + md_pa_init(); + + /* Calculate dump size. */ + dumpsize = 0L; + ehdr.e_phnum = foreach_chunk(cb_size, &dumpsize); + hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize; + fileofs = MD_ALIGN(hdrsz); + dumpsize += fileofs; + hdrgap = fileofs - DEV_ALIGN(hdrsz); + + /* Determine dump offset on device. */ + if (di->mediasize < SIZEOF_METADATA + dumpsize + sizeof(kdh) * 2) { + error = ENOSPC; + goto fail; + } + dumplo = di->mediaoffset + di->mediasize - dumpsize; + dumplo -= sizeof(kdh) * 2; + + mkdumpheader(&kdh, KERNELDUMP_ARM_VERSION, dumpsize, di->blocksize); + + printf("Dumping %llu MB (%d chunks)\n", (long long)dumpsize >> 20, + ehdr.e_phnum); + + /* Dump leader */ + error = di->dumper(di->priv, &kdh, 0, dumplo, sizeof(kdh)); + if (error) + goto fail; + dumplo += sizeof(kdh); + + /* Dump ELF header */ + error = buf_write(di, (char*)&ehdr, sizeof(ehdr)); + if (error) + goto fail; + + /* Dump program headers */ + error = foreach_chunk(cb_dumphdr, di); + if (error < 0) + goto fail; + buf_flush(di); + + /* + * All headers are written using blocked I/O, so we know the + * current offset is (still) block aligned. Skip the alignement + * in the file to have the segment contents aligned at page + * boundary. We cannot use MD_ALIGN on dumplo, because we don't + * care and may very well be unaligned within the dump device. + */ + dumplo += hdrgap; + + /* Dump memory chunks (updates dumplo) */ + error = foreach_chunk(cb_dumpdata, di); + if (error < 0) + goto fail; + + /* Dump trailer */ + error = di->dumper(di->priv, &kdh, 0, dumplo, sizeof(kdh)); + if (error) + goto fail; + + /* Signal completion, signoff and exit stage left. */ + di->dumper(di->priv, NULL, 0, 0, 0); + printf("\nDump complete\n"); + return; + + fail: + if (error < 0) + error = -error; + + if (error == ECANCELED) + printf("\nDump aborted\n"); + else if (error == ENOSPC) + printf("\nDump failed. Partition too small.\n"); + else + printf("\n** DUMP FAILED (ERROR %d) **\n", error); } |