/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <mach/mach_types.h>
#include <mach/vm_attributes.h>
#include <mach/vm_param.h>
#include <libsa/types.h>
-
-unsigned kdp_vm_read( caddr_t, caddr_t, unsigned);
-unsigned kdp_vm_write( caddr_t, caddr_t, unsigned);
-unsigned kdp_copy_kmem( caddr_t, caddr_t, unsigned);
-unsigned int not_in_kdp = 1; /* Cleared when we begin to access vm functions in kdp */
+#include <vm/vm_map.h>
+#include <i386/pmap.h>
-/*
- *
- */
-unsigned kdp_vm_read(
- caddr_t src,
- caddr_t dst,
- unsigned len)
+#include <kdp/kdp_core.h>
+#include <kdp/kdp_internal.h>
+#include <mach-o/loader.h>
+#include <mach/vm_map.h>
+#include <mach/vm_statistics.h>
+#include <mach/thread_status.h>
+#include <i386/thread.h>
+
+#include <vm/vm_protos.h>
+#include <vm/vm_kern.h>
+
+int kern_dump(void);
+int kdp_dump_trap(int type, x86_saved_state32_t *regs);
+
+typedef struct {
+ int flavor; /* the number for this flavor */
+ mach_msg_type_number_t count; /* count of ints in this flavor */
+} mythread_state_flavor_t;
+
+static mythread_state_flavor_t thread_flavor_array [] = {
+ {x86_THREAD_STATE32, x86_THREAD_STATE32_COUNT}
+};
+
+static int kdp_mynum_flavors = 1;
+static int MAX_TSTATE_FLAVORS = 1;
+
+typedef struct {
+ vm_offset_t header;
+ int hoffset;
+ mythread_state_flavor_t *flavors;
+ int tstate_size;
+} tir_t;
+
+char command_buffer[512];
+
+static void
+kern_collectth_state(thread_t thread, tir_t *t)
{
- return kdp_copy_kmem(src, dst, len);
+ vm_offset_t header;
+ int hoffset, i ;
+ mythread_state_flavor_t *flavors;
+ struct thread_command *tc;
+ /*
+ * Fill in thread command structure.
+ */
+ header = t->header;
+ hoffset = t->hoffset;
+ flavors = t->flavors;
+
+ tc = (struct thread_command *) (header + hoffset);
+ tc->cmd = LC_THREAD;
+ tc->cmdsize = sizeof(struct thread_command) + t->tstate_size;
+ hoffset += sizeof(struct thread_command);
+ /*
+ * Follow with a struct thread_state_flavor and
+ * the appropriate thread state struct for each
+ * thread state flavor.
+ */
+ for (i = 0; i < kdp_mynum_flavors; i++) {
+ *(mythread_state_flavor_t *)(header+hoffset) =
+ flavors[i];
+ hoffset += sizeof(mythread_state_flavor_t);
+ /* Locate and obtain the non-volatile register context
+ * for this kernel thread. This should ideally be
+ * encapsulated in machine_thread_get_kern_state()
+ * but that routine appears to have been co-opted
+ * by CHUD to obtain pre-interrupt state.
+ */
+ if (flavors[i].flavor == x86_THREAD_STATE32) {
+ x86_thread_state32_t *tstate = (x86_thread_state32_t *) (header + hoffset);
+ vm_offset_t kstack;
+ bzero(tstate, x86_THREAD_STATE32_COUNT * sizeof(int));
+ if ((kstack = thread->kernel_stack) != 0){
+ struct x86_kernel_state *iks = STACK_IKS(kstack);
+ tstate->ebx = iks->k_ebx;
+ tstate->esp = iks->k_esp;
+ tstate->ebp = iks->k_ebp;
+ tstate->edi = iks->k_edi;
+ tstate->esi = iks->k_esi;
+ tstate->eip = iks->k_eip;
+ }
+ }
+ else if (machine_thread_get_kern_state(thread,
+ flavors[i].flavor, (thread_state_t) (header+hoffset),
+ &flavors[i].count) != KERN_SUCCESS)
+ printf ("Failure in machine_thread_get_kern_state()\n");
+ hoffset += flavors[i].count*sizeof(int);
+ }
+
+ t->hoffset = hoffset;
}
-/*
- *
+/* Intended to be called from the kernel trap handler if an unrecoverable fault
+ * occurs during a crashdump (which shouldn't happen since we validate mappings
+ * and so on). This should be reworked to attempt some form of recovery.
*/
-unsigned kdp_vm_write(
- caddr_t src,
- caddr_t dst,
- unsigned len)
-{
- return kdp_copy_kmem(src, dst, len);
+int
+kdp_dump_trap(
+ int type,
+ __unused x86_saved_state32_t *saved_state)
+{
+ printf ("An unexpected trap (type %d) occurred during the system dump, terminating.\n", type);
+ kdp_send_crashdump_pkt (KDP_EOF, NULL, 0, ((void *) 0));
+ abort_panic_transfer();
+ kdp_flag &= ~KDP_PANIC_DUMP_ENABLED;
+ kdp_flag &= ~PANIC_CORE_ON_NMI;
+ kdp_flag &= ~PANIC_LOG_DUMP;
+
+ kdp_reset();
+
+ kdp_raise_exception(EXC_BAD_ACCESS, 0, 0, kdp.saved_state);
+ return( 0 );
}
-/* A stub until i386 support is added for remote kernel core dumps */
-int kern_dump()
+
+int
+kern_dump(void)
{
- return 0;
+ vm_map_t map;
+ unsigned int thread_count, segment_count;
+ unsigned int command_size = 0, header_size = 0, tstate_size = 0;
+
+ uint64_t hoffset = 0, foffset = 0, nfoffset = 0, max_header_size;
+ vm_offset_t header, txstart;
+ vm_address_t vmoffset;
+
+ struct mach_header *mh;
+ struct segment_command *sc;
+ vm_size_t size;
+ vm_prot_t prot = 0;
+ vm_prot_t maxprot = 0;
+ mythread_state_flavor_t flavors[MAX_TSTATE_FLAVORS];
+ vm_size_t nflavors;
+ vm_size_t i;
+ uint32_t nesting_depth = 0;
+ kern_return_t kret = 0;
+ struct vm_region_submap_info_64 vbr;
+ mach_msg_type_number_t vbrcount = 0;
+ tir_t tir1;
+
+ int error = 0;
+ int panic_error = 0;
+
+ map = kernel_map;
+
+ thread_count = 1;
+ segment_count = get_vmmap_entries(map);
+
+ printf("Kernel map has %d entries\n", segment_count);
+
+ nflavors = kdp_mynum_flavors;
+ bcopy((char *)thread_flavor_array,(char *) flavors,sizeof(thread_flavor_array));
+
+ for (i = 0; i < nflavors; i++)
+ tstate_size += sizeof(mythread_state_flavor_t) +
+ (flavors[i].count * sizeof(int));
+
+ command_size = (segment_count) *
+ sizeof(struct segment_command) +
+ thread_count * sizeof(struct thread_command) +
+ tstate_size * thread_count;
+
+ header_size = command_size + sizeof(struct mach_header);
+ header = (vm_offset_t) command_buffer;
+
+ /*
+ * Set up Mach-O header for currently executing 32 bit kernel.
+ */
+ printf ("Generated Mach-O header size was %d\n", header_size);
+
+ mh = (struct mach_header *) header;
+ mh->magic = MH_MAGIC;
+ mh->cputype = cpu_type();
+ mh->cpusubtype = cpu_subtype();
+ mh->filetype = MH_CORE;
+ mh->ncmds = segment_count + thread_count;
+ mh->sizeofcmds = command_size;
+ mh->flags = 0;
+
+ hoffset = sizeof(struct mach_header); /* offset into header */
+ foffset = round_page_32(header_size); /* offset into file */
+ /* Padding */
+ if ((foffset - header_size) < (4*sizeof(struct segment_command))) {
+ foffset += ((4*sizeof(struct segment_command)) - (foffset-header_size));
+ }
+
+ max_header_size = foffset;
+
+ vmoffset = VM_MIN_KERNEL_ADDRESS; /* offset into VM */
+
+ /* Transmit the Mach-O MH_CORE header, and seek forward past the
+ * area reserved for the segment and thread commands
+ * to begin data transmission
+ */
+
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_SEEK, NULL, sizeof(nfoffset) , &nfoffset)) < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ if ((panic_error = kdp_send_crashdump_data (KDP_DATA, NULL, sizeof(struct mach_header), (caddr_t) mh) < 0)) {
+ printf ("kdp_send_crashdump_data failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_SEEK, NULL, sizeof(foffset) , &foffset) < 0)) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+ printf ("Transmitting kernel state:\n");
+
+ while ((segment_count > 0) || (kret == KERN_SUCCESS)) {
+ while (1) {
+
+ /*
+ * Get region information for next region.
+ */
+
+ vbrcount = VM_REGION_SUBMAP_INFO_COUNT_64;
+ if((kret = vm_region_recurse_64(map,
+ &vmoffset, &size, &nesting_depth,
+ (vm_region_recurse_info_t)&vbr,
+ &vbrcount)) != KERN_SUCCESS) {
+ break;
+ }
+
+ if(vbr.is_submap) {
+ nesting_depth++;
+ continue;
+ } else {
+ break;
+ }
+ }
+
+ if(kret != KERN_SUCCESS)
+ break;
+
+ prot = vbr.protection;
+ maxprot = vbr.max_protection;
+ /*
+ * Fill in segment command structure.
+ */
+
+ if (hoffset > max_header_size)
+ break;
+ sc = (struct segment_command *) (header);
+ sc->cmd = LC_SEGMENT;
+ sc->cmdsize = sizeof(struct segment_command);
+ sc->segname[0] = 0;
+ sc->vmaddr = vmoffset;
+ sc->vmsize = size;
+ sc->fileoff = (uint32_t) foffset;
+ sc->filesize = size;
+ sc->maxprot = maxprot;
+ sc->initprot = prot;
+ sc->nsects = 0;
+
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_SEEK, NULL, sizeof(hoffset) , &hoffset)) < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ if ((panic_error = kdp_send_crashdump_data (KDP_DATA, NULL, sizeof(struct segment_command) , (caddr_t) sc)) < 0) {
+ printf ("kdp_send_crashdump_data failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ /* Do not transmit memory tagged VM_MEMORY_IOKIT - instead,
+ * seek past that region on the server - this creates a
+ * hole in the file.
+ */
+
+ if ((vbr.user_tag != VM_MEMORY_IOKIT)) {
+
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_SEEK, NULL, sizeof(foffset) , &foffset)) < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ txstart = vmoffset;
+
+ if ((panic_error = kdp_send_crashdump_data (KDP_DATA, NULL, size, (caddr_t) txstart)) < 0) {
+ printf ("kdp_send_crashdump_data failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+ }
+
+ hoffset += sizeof(struct segment_command);
+ foffset += size;
+ vmoffset += size;
+ segment_count--;
+ }
+ tir1.header = header;
+ tir1.hoffset = 0;
+ tir1.flavors = flavors;
+ tir1.tstate_size = tstate_size;
+
+ /* Now send out the LC_THREAD load command, with the thread information
+ * for the current activation.
+ * Note that the corefile can contain LC_SEGMENT commands with file
+ * offsets that point past the edge of the corefile, in the event that
+ * the last N VM regions were all I/O mapped or otherwise
+ * non-transferable memory, not followed by a normal VM region;
+ * i.e. there will be no hole that reaches to the end of the core file.
+ */
+ kern_collectth_state (current_thread(), &tir1);
+
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_SEEK, NULL, sizeof(hoffset) , &hoffset)) < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ if ((panic_error = kdp_send_crashdump_data (KDP_DATA, NULL, tir1.hoffset , (caddr_t) header)) < 0) {
+ printf ("kdp_send_crashdump_data failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+
+ /* last packet */
+ if ((panic_error = kdp_send_crashdump_pkt (KDP_EOF, NULL, 0, ((void *) 0))) < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ error = panic_error;
+ goto out;
+ }
+out:
+ return (error);
}
projects / apple / xnu.git / blobdiff