Date: Wed, 7 Jan 2015 01:01:40 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r276772 - in head/sys: amd64/include arm/arm arm/include conf i386/include kern mips/include mips/mips pc98/include powerpc/aim powerpc/booke powerpc/include powerpc/powerpc sparc64/inc... Message-ID: <201501070101.t0711e9O046319@svn.freebsd.org>
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Author: markj Date: Wed Jan 7 01:01:39 2015 New Revision: 276772 URL: https://svnweb.freebsd.org/changeset/base/276772 Log: Factor out duplicated code from dumpsys() on each architecture into generic code in sys/kern/kern_dump.c. Most dumpsys() implementations are nearly identical and simply redefine a number of constants and helper subroutines; a generic implementation will make it easier to implement features around kernel core dumps. This change does not alter any minidump code and should have no functional impact. PR: 193873 Differential Revision: https://reviews.freebsd.org/D904 Submitted by: Conrad Meyer <conrad.meyer@isilon.com> Reviewed by: jhibbits (earlier version) Sponsored by: EMC / Isilon Storage Division Added: head/sys/amd64/include/dump.h (contents, props changed) head/sys/arm/include/dump.h (contents, props changed) head/sys/i386/include/dump.h (contents, props changed) head/sys/kern/kern_dump.c (contents, props changed) head/sys/mips/include/dump.h (contents, props changed) head/sys/pc98/include/dump.h (contents, props changed) head/sys/powerpc/include/dump.h (contents, props changed) head/sys/sparc64/include/dump.h (contents, props changed) head/sys/x86/include/dump.h (contents, props changed) Modified: head/sys/arm/arm/dump_machdep.c head/sys/conf/files head/sys/kern/kern_shutdown.c head/sys/mips/include/md_var.h head/sys/mips/mips/dump_machdep.c head/sys/powerpc/aim/mmu_oea.c head/sys/powerpc/aim/mmu_oea64.c head/sys/powerpc/booke/pmap.c head/sys/powerpc/include/pmap.h head/sys/powerpc/powerpc/dump_machdep.c head/sys/powerpc/powerpc/mmu_if.m head/sys/powerpc/powerpc/pmap_dispatch.c head/sys/sparc64/sparc64/dump_machdep.c head/sys/sys/conf.h head/sys/sys/kerneldump.h head/sys/x86/x86/dump_machdep.c Added: head/sys/amd64/include/dump.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/amd64/include/dump.h Wed Jan 7 01:01:39 2015 (r276772) @@ -0,0 +1,6 @@ +/*- + * This file is in the public domain. + */ +/* $FreeBSD$ */ + +#include <x86/dump.h> Modified: head/sys/arm/arm/dump_machdep.c ============================================================================== --- head/sys/arm/arm/dump_machdep.c Tue Jan 6 23:40:39 2015 (r276771) +++ head/sys/arm/arm/dump_machdep.c Wed Jan 7 01:01:39 2015 (r276772) @@ -32,148 +32,26 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> -#include <sys/cons.h> #include <sys/sysctl.h> #include <sys/kernel.h> #include <sys/proc.h> #include <sys/kerneldump.h> -#ifdef SW_WATCHDOG -#include <sys/watchdog.h> -#endif + #include <vm/vm.h> #include <vm/pmap.h> +#include <machine/dump.h> #include <machine/elf.h> #include <machine/md_var.h> #include <machine/pcb.h> #include <machine/armreg.h> -CTASSERT(sizeof(struct kerneldumpheader) == 512); - int do_minidump = 1; SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0, "Enable mini crash dumps"); -/* - * 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) +void +dumpsys_wbinv_all(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); -} - -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 = dump_write(di, 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 = dump_write(di, 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 a, pa; - void *va; - uint32_t pgs; - size_t counter, sz, chunk; - int i, c, error; - - va = 0; - error = 0; /* catch case in which chunk size is 0 */ - counter = 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 data. Note that in the SMP case this @@ -186,70 +64,25 @@ cb_dumpdata(struct md_pa *mdp, int seqnr #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; - } - for (i = 0; i < chunk; i++) { - a = pa + i * PAGE_SIZE; - va = pmap_kenter_temporary(trunc_page(a), i); - } -#ifdef SW_WATCHDOG - wdog_kern_pat(WD_LASTVAL); -#endif - error = dump_write(di, va, 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) +void +dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va) { - 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; + vm_paddr_t a; + int i; - error = buf_write(di, (char*)&phdr, sizeof(phdr)); - fileofs += phdr.p_filesz; - return (error); + for (i = 0; i < chunk; i++) { + a = pa + i * PAGE_SIZE; + *va = pmap_kenter_temporary(trunc_page(a), i); + } } /* * Add a header to be used by libkvm to get the va to pa delta */ -static int -dump_os_header(struct dumperinfo *di) +int +dumpsys_write_aux_headers(struct dumperinfo *di) { Elf_Phdr phdr; int error; @@ -264,144 +97,6 @@ dump_os_header(struct dumperinfo *di) phdr.p_memsz = 0; phdr.p_align = PAGE_SIZE; - error = buf_write(di, (char*)&phdr, sizeof(phdr)); - 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); -} - -int -dumpsys(struct dumperinfo *di) -{ - Elf_Ehdr ehdr; - uint32_t dumpsize; - off_t hdrgap; - size_t hdrsz; - int error; - - if (do_minidump) - return (minidumpsys(di)); - - 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) + 1; - 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, KERNELDUMPMAGIC, KERNELDUMP_ARM_VERSION, dumpsize, di->blocksize); - - printf("Dumping %llu MB (%d chunks)\n", (long long)dumpsize >> 20, - ehdr.e_phnum - 1); - - /* Dump leader */ - error = dump_write(di, &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) - error = dump_os_header(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 = dump_write(di, &kdh, 0, dumplo, sizeof(kdh)); - if (error) - goto fail; - - /* Signal completion, signoff and exit stage left. */ - dump_write(di, NULL, 0, 0, 0); - printf("\nDump complete\n"); - return (0); - - 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); + error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr)); return (error); } Added: head/sys/arm/include/dump.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/include/dump.h Wed Jan 7 01:01:39 2015 (r276772) @@ -0,0 +1,70 @@ +/*- + * Copyright (c) 2014 EMC Corp. + * Author: Conrad Meyer <conrad.meyer@isilon.com> + * 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. + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_DUMP_H_ +#define _MACHINE_DUMP_H_ + +#define KERNELDUMP_ARCH_VERSION KERNELDUMP_ARM_VERSION +#define EM_VALUE EM_ARM +/* XXX: I suppose 20 should be enough. */ +#define DUMPSYS_MD_PA_NPAIRS 20 +#define DUMPSYS_NUM_AUX_HDRS 1 + +void dumpsys_wbinv_all(void); +int dumpsys_write_aux_headers(struct dumperinfo *di); + +static inline void +dumpsys_pa_init(void) +{ + + dumpsys_gen_pa_init(); +} + +static inline struct dump_pa * +dumpsys_pa_next(struct dump_pa *p) +{ + + return (dumpsys_gen_pa_next(p)); +} + +static inline void +dumpsys_unmap_chunk(vm_paddr_t pa, size_t s, void *va) +{ + + dumpsys_gen_unmap_chunk(pa, s, va); +} + +static inline int +dumpsys(struct dumperinfo *di) +{ + + return (dumpsys_generic(di)); +} + +#endif /* !_MACHINE_DUMP_H_ */ Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Tue Jan 6 23:40:39 2015 (r276771) +++ head/sys/conf/files Wed Jan 7 01:01:39 2015 (r276772) @@ -2947,6 +2947,7 @@ kern/kern_cpuset.c standard kern/kern_context.c standard kern/kern_descrip.c standard kern/kern_dtrace.c optional kdtrace_hooks +kern/kern_dump.c standard kern/kern_environment.c standard kern/kern_et.c standard kern/kern_event.c standard Added: head/sys/i386/include/dump.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/i386/include/dump.h Wed Jan 7 01:01:39 2015 (r276772) @@ -0,0 +1,6 @@ +/*- + * This file is in the public domain. + */ +/* $FreeBSD$ */ + +#include <x86/dump.h> Added: head/sys/kern/kern_dump.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/kern/kern_dump.c Wed Jan 7 01:01:39 2015 (r276772) @@ -0,0 +1,393 @@ +/*- + * 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. + * + * 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> +__FBSDID("$FreeBSD$"); + +#include "opt_watchdog.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/cons.h> +#include <sys/kernel.h> +#include <sys/proc.h> +#include <sys/kerneldump.h> +#ifdef SW_WATCHDOG +#include <sys/watchdog.h> +#endif +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/pmap.h> +#include <machine/dump.h> +#include <machine/elf.h> +#include <machine/md_var.h> +#include <machine/pcb.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)) + +off_t dumplo; + +/* Handle buffered writes. */ +static char buffer[DEV_BSIZE]; +static size_t fragsz; + +struct dump_pa dump_map[DUMPSYS_MD_PA_NPAIRS]; + +void +dumpsys_gen_pa_init(void) +{ +#if !defined(__sparc__) && !defined(__powerpc__) + 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].pa_start = dump_avail[idx]; + dump_map[n].pa_size = dump_avail[idx + 1] - dump_avail[idx]; + } +#endif +} + +struct dump_pa * +dumpsys_gen_pa_next(struct dump_pa *mdp) +{ + + if (mdp == NULL) + return (&dump_map[0]); + + mdp++; + if (mdp->pa_size == 0) + mdp = NULL; + return (mdp); +} + +void +dumpsys_gen_wbinv_all(void) +{ +} + +void +dumpsys_gen_unmap_chunk(vm_paddr_t pa __unused, size_t chunk __unused, + void *va __unused) +{ +} + +int +dumpsys_gen_write_aux_headers(struct dumperinfo *di) +{ + + return (0); +} + +int +dumpsys_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 = dump_write(di, buffer, 0, dumplo, + DEV_BSIZE); + if (error) + return (error); + dumplo += DEV_BSIZE; + fragsz = 0; + } + } + return (0); +} + +int +dumpsys_buf_flush(struct dumperinfo *di) +{ + int error; + + if (fragsz == 0) + return (0); + + error = dump_write(di, buffer, 0, dumplo, DEV_BSIZE); + dumplo += DEV_BSIZE; + fragsz = 0; + return (error); +} + +CTASSERT(PAGE_SHIFT < 20); +#define PG2MB(pgs) ((pgs + (1 << (20 - PAGE_SHIFT)) - 1) >> (20 - PAGE_SHIFT)) + +int +dumpsys_cb_dumpdata(struct dump_pa *mdp, int seqnr, void *arg) +{ + struct dumperinfo *di = (struct dumperinfo*)arg; + vm_paddr_t pa; + void *va; + uint64_t pgs; + size_t counter, sz, chunk; + int c, error; + u_int maxdumppgs; + + error = 0; /* catch case in which chunk size is 0 */ + counter = 0; /* Update twiddle every 16MB */ + va = 0; + pgs = mdp->pa_size / PAGE_SIZE; + pa = mdp->pa_start; + maxdumppgs = min(di->maxiosize / PAGE_SIZE, MAXDUMPPGS); + if (maxdumppgs == 0) /* seatbelt */ + maxdumppgs = 1; + + printf(" chunk %d: %juMB (%ju pages)", seqnr, (uintmax_t)PG2MB(pgs), + (uintmax_t)pgs); + + dumpsys_wbinv_all(); + while (pgs) { + chunk = pgs; + if (chunk > maxdumppgs) + chunk = maxdumppgs; + sz = chunk << PAGE_SHIFT; + counter += sz; + if (counter >> 24) { + printf(" %ju", (uintmax_t)PG2MB(pgs)); + counter &= (1 << 24) - 1; + } + + dumpsys_map_chunk(pa, chunk, &va); +#ifdef SW_WATCHDOG + wdog_kern_pat(WD_LASTVAL); +#endif + + error = dump_write(di, va, 0, dumplo, sz); + dumpsys_unmap_chunk(pa, chunk, va); + 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); +} + +int +dumpsys_foreach_chunk(dumpsys_callback_t cb, void *arg) +{ + struct dump_pa *mdp; + int error, seqnr; + + seqnr = 0; + mdp = dumpsys_pa_next(NULL); + while (mdp != NULL) { + error = (*cb)(mdp, seqnr++, arg); + if (error) + return (-error); + mdp = dumpsys_pa_next(mdp); + } + return (seqnr); +} + +static off_t fileofs; + +static int +cb_dumphdr(struct dump_pa *mdp, int seqnr, void *arg) +{ + struct dumperinfo *di = (struct dumperinfo*)arg; + Elf_Phdr phdr; + uint64_t size; + int error; + + size = mdp->pa_size; + bzero(&phdr, sizeof(phdr)); + phdr.p_type = PT_LOAD; + phdr.p_flags = PF_R; /* XXX */ + phdr.p_offset = fileofs; +#ifdef __powerpc__ + phdr.p_vaddr = (do_minidump? mdp->pa_start : ~0L); + phdr.p_paddr = (do_minidump? ~0L : mdp->pa_start); +#else + phdr.p_vaddr = mdp->pa_start; + phdr.p_paddr = mdp->pa_start; +#endif + phdr.p_filesz = size; + phdr.p_memsz = size; + phdr.p_align = PAGE_SIZE; + + error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr)); + fileofs += phdr.p_filesz; + return (error); +} + +static int +cb_size(struct dump_pa *mdp, int seqnr, void *arg) +{ + uint64_t *sz; + + sz = (uint64_t *)arg; + *sz += (uint64_t)mdp->pa_size; + return (0); +} + +int +dumpsys_generic(struct dumperinfo *di) +{ + static struct kerneldumpheader kdh; + Elf_Ehdr ehdr; + uint64_t dumpsize; + off_t hdrgap; + size_t hdrsz; + int error; + +#ifndef __powerpc__ + if (do_minidump) + return (minidumpsys(di)); +#endif + + 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_VALUE; + 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); + + dumpsys_pa_init(); + + /* Calculate dump size. */ + dumpsize = 0L; + ehdr.e_phnum = dumpsys_foreach_chunk(cb_size, &dumpsize) + + DUMPSYS_NUM_AUX_HDRS; + 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, KERNELDUMPMAGIC, KERNELDUMP_ARCH_VERSION, dumpsize, + di->blocksize); + + printf("Dumping %ju MB (%d chunks)\n", (uintmax_t)dumpsize >> 20, + ehdr.e_phnum - DUMPSYS_NUM_AUX_HDRS); + + /* Dump leader */ + error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh)); + if (error) + goto fail; + dumplo += sizeof(kdh); + + /* Dump ELF header */ + error = dumpsys_buf_write(di, (char*)&ehdr, sizeof(ehdr)); + if (error) + goto fail; + + /* Dump program headers */ + error = dumpsys_foreach_chunk(cb_dumphdr, di); + if (error < 0) + goto fail; + error = dumpsys_write_aux_headers(di); + if (error < 0) + goto fail; + dumpsys_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 = dumpsys_foreach_chunk(dumpsys_cb_dumpdata, di); + if (error < 0) + goto fail; + + /* Dump trailer */ + error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh)); + if (error) + goto fail; + + /* Signal completion, signoff and exit stage left. */ + dump_write(di, NULL, 0, 0, 0); + printf("\nDump complete\n"); + return (0); + + 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); + return (error); +} Modified: head/sys/kern/kern_shutdown.c ============================================================================== --- head/sys/kern/kern_shutdown.c Tue Jan 6 23:40:39 2015 (r276771) +++ head/sys/kern/kern_shutdown.c Wed Jan 7 01:01:39 2015 (r276772) @@ -73,6 +73,7 @@ __FBSDID("$FreeBSD$"); #include <ddb/ddb.h> #include <machine/cpu.h> +#include <machine/dump.h> #include <machine/pcb.h> #include <machine/smp.h> Added: head/sys/mips/include/dump.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/mips/include/dump.h Wed Jan 7 01:01:39 2015 (r276772) @@ -0,0 +1,76 @@ +/*- + * Copyright (c) 2014 EMC Corp. + * Author: Conrad Meyer <conrad.meyer@isilon.com> + * 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. + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_DUMP_H_ +#define _MACHINE_DUMP_H_ + +#define KERNELDUMP_ARCH_VERSION KERNELDUMP_MIPS_VERSION +#define EM_VALUE EM_MIPS +/* XXX: I suppose 20 should be enough. */ +#define DUMPSYS_MD_PA_NPAIRS 20 +#define DUMPSYS_NUM_AUX_HDRS 0 + +void dumpsys_wbinv_all(void); + +static inline void +dumpsys_pa_init(void) +{ + + dumpsys_gen_pa_init(); +} + +static inline struct dump_pa * +dumpsys_pa_next(struct dump_pa *p) +{ + + return (dumpsys_gen_pa_next(p)); +} + +static inline void +dumpsys_unmap_chunk(vm_paddr_t pa, size_t s, void *va) +{ + + dumpsys_gen_unmap_chunk(pa, s, va); +} + +static inline int +dumpsys_write_aux_headers(struct dumperinfo *di) +{ + + return (dumpsys_gen_write_aux_headers(di)); +} + +static inline int +dumpsys(struct dumperinfo *di) +{ + + return (dumpsys_generic(di)); +} + +#endif /* !_MACHINE_DUMP_H_ */ Modified: head/sys/mips/include/md_var.h ============================================================================== --- head/sys/mips/include/md_var.h Tue Jan 6 23:40:39 2015 (r276771) +++ head/sys/mips/include/md_var.h Wed Jan 7 01:01:39 2015 (r276772) @@ -80,4 +80,5 @@ struct dumperinfo; void dump_add_page(vm_paddr_t); void dump_drop_page(vm_paddr_t); int minidumpsys(struct dumperinfo *); + #endif /* !_MACHINE_MD_VAR_H_ */ Modified: head/sys/mips/mips/dump_machdep.c ============================================================================== --- head/sys/mips/mips/dump_machdep.c Tue Jan 6 23:40:39 2015 (r276771) +++ head/sys/mips/mips/dump_machdep.c Wed Jan 7 01:01:39 2015 (r276772) @@ -27,342 +27,30 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#include "opt_watchdog.h" - #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> -#include <sys/cons.h> -#include <sys/sysctl.h> -#include <sys/kernel.h> -#include <sys/proc.h> #include <sys/kerneldump.h> -#ifdef SW_WATCHDOG -#include <sys/watchdog.h> -#endif -#include <vm/vm.h> -#include <vm/pmap.h> -#include <machine/elf.h> -#include <machine/md_var.h> -#include <machine/pcb.h> *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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