+struct corehdr *
+create_panic_header(unsigned int request, const char *corename,
+ unsigned length, unsigned int block)
+{
+ struct kdp_udpiphdr aligned_ui, *ui = &aligned_ui;
+ struct kdp_ip aligned_ip, *ip = &aligned_ip;
+ struct kdp_ether_header *eh;
+ struct corehdr *coreh;
+ const char *mode = "octet";
+ char modelen = strlen(mode) + 1;
+
+ size_t fmask_size = sizeof(KDP_FEATURE_MASK_STRING) + sizeof(kdp_crashdump_feature_mask);
+
+ pkt.off = sizeof (struct kdp_ether_header);
+ pkt.len = (unsigned int)(length + ((request == KDP_WRQ) ? modelen + fmask_size : 0) +
+ (corename ? (strlen(corename) + 1 ): 0) + sizeof(struct corehdr));
+
+#if DO_ALIGN
+ bcopy((char *)&pkt.data[pkt.off], (char *)ui, sizeof(*ui));
+#else
+ ui = (struct kdp_udpiphdr *)&pkt.data[pkt.off];
+#endif
+ ui->ui_next = ui->ui_prev = 0;
+ ui->ui_x1 = 0;
+ ui->ui_pr = IPPROTO_UDP;
+ ui->ui_len = htons((u_short)pkt.len + sizeof (struct kdp_udphdr));
+ ui->ui_src.s_addr = (uint32_t)kdp_current_ip_address;
+ /* Already in network byte order via inet_aton() */
+ ui->ui_dst.s_addr = panic_server_ip;
+ ui->ui_sport = htons(panicd_port);
+ ui->ui_dport = ((request == KDP_WRQ) ? htons(panicd_port) : last_panic_port);
+ ui->ui_ulen = ui->ui_len;
+ ui->ui_sum = 0;
+#if DO_ALIGN
+ bcopy((char *)ui, (char *)&pkt.data[pkt.off], sizeof(*ui));
+ bcopy((char *)&pkt.data[pkt.off], (char *)ip, sizeof(*ip));
+#else
+ ip = (struct kdp_ip *)&pkt.data[pkt.off];
+#endif
+ ip->ip_len = htons(sizeof (struct kdp_udpiphdr) + pkt.len);
+ ip->ip_v = IPVERSION;
+ ip->ip_id = htons(ip_id++);
+ ip->ip_hl = sizeof (struct kdp_ip) >> 2;
+ ip->ip_ttl = udp_ttl;
+ ip->ip_sum = 0;
+ ip->ip_sum = htons(~ip_sum((unsigned char *)ip, ip->ip_hl));
+#if DO_ALIGN
+ bcopy((char *)ip, (char *)&pkt.data[pkt.off], sizeof(*ip));
+#endif
+
+ pkt.len += (unsigned int)sizeof (struct kdp_udpiphdr);
+
+ pkt.off += (unsigned int)sizeof (struct kdp_udpiphdr);
+
+ coreh = (struct corehdr *) &pkt.data[pkt.off];
+ coreh->th_opcode = htons((u_short)request);
+
+ if (request == KDP_WRQ)
+ {
+ char *cp;
+
+ cp = coreh->th_u.tu_rpl;
+ cp += strlcpy (cp, corename, KDP_MAXPACKET);
+ *cp++ = '\0';
+ cp += strlcpy (cp, mode, KDP_MAXPACKET - strlen(corename));
+ *cp++ = '\0';
+ cp += strlcpy(cp, KDP_FEATURE_MASK_STRING, sizeof(KDP_FEATURE_MASK_STRING));
+ *cp++ = '\0'; /* Redundant */
+ bcopy(&kdp_crashdump_feature_mask, cp, sizeof(kdp_crashdump_feature_mask));
+ kdp_crashdump_pkt_size = KDP_LARGE_CRASHDUMP_PKT_SIZE;
+ PE_parse_boot_argn("kdp_crashdump_pkt_size", &kdp_crashdump_pkt_size, sizeof(kdp_crashdump_pkt_size));
+ cp += sizeof(kdp_crashdump_feature_mask);
+ *(uint32_t *)cp = htonl(kdp_crashdump_pkt_size);
+ }
+ else
+ {
+ coreh->th_block = htonl((unsigned int) block);
+ }
+
+ pkt.off -= (unsigned int)sizeof (struct kdp_udpiphdr);
+ pkt.off -= (unsigned int)sizeof (struct kdp_ether_header);
+
+ eh = (struct kdp_ether_header *)&pkt.data[pkt.off];
+ enaddr_copy(&kdp_current_mac_address, eh->ether_shost);
+ enaddr_copy(&destination_mac, eh->ether_dhost);
+ eh->ether_type = htons(ETHERTYPE_IP);
+
+ pkt.len += (unsigned int)sizeof (struct kdp_ether_header);
+ return coreh;
+}
+
+static int kdp_send_crashdump_seek(char *corename, uint64_t seek_off)
+{
+ int panic_error;
+
+ if (kdp_feature_large_crashdumps) {
+ panic_error = kdp_send_crashdump_pkt(KDP_SEEK, corename,
+ sizeof(seek_off),
+ &seek_off);
+ } else {
+ uint32_t off = (uint32_t) seek_off;
+ panic_error = kdp_send_crashdump_pkt(KDP_SEEK, corename,
+ sizeof(off), &off);
+ }
+
+ if (panic_error < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n",
+ panic_error);
+ return panic_error;
+ }
+
+ return 0;
+}
+
+int kdp_send_crashdump_data(unsigned int request, char *corename,
+ int64_t length, caddr_t txstart)
+{
+ int panic_error = 0;
+
+ while (length > 0) {
+ uint64_t chunk = MIN(kdp_crashdump_pkt_size, length);
+
+ panic_error = kdp_send_crashdump_pkt(request, corename, chunk,
+ txstart);
+ if (panic_error < 0) {
+ printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ return panic_error;
+ }
+
+ txstart += chunk;
+ length -= chunk;
+ }
+ return 0;
+}
+
+uint32_t kdp_crashdump_short_pkt;
+
+int
+kdp_send_crashdump_pkt(unsigned int request, char *corename,
+ uint64_t length, void *panic_data)
+{
+ int poll_count;
+ struct corehdr *th = NULL;
+ char rretries, tretries;
+
+ if (kdp_dump_start_time == 0) {
+ kdp_dump_start_time = mach_absolute_time();
+ kdp_superblock_dump_start_time = kdp_dump_start_time;
+ }
+
+ tretries = rretries = 0;
+ poll_count = KDP_CRASHDUMP_POLL_COUNT;
+ pkt.off = pkt.len = 0;
+ if (request == KDP_WRQ) /* longer timeout for initial request */
+ poll_count += 1000;
+
+TRANSMIT_RETRY:
+ tretries++;
+
+ if (tretries >=15) {
+/* The crashdump server is unreachable for some reason. This could be a network
+ * issue or, if we've been especially unfortunate, we've hit Radar 2760413,
+ * which is a long standing problem with the IOKit polled mode network driver
+ * shim which can prevent transmits/receives completely.
+ */
+ printf ("Cannot contact panic server, timing out.\n");
+ return (-3);
+ }
+
+ if (tretries > 2)
+ printf("TX retry #%d ", tretries );
+
+ th = create_panic_header(request, corename, (unsigned)length, panic_block);
+
+ if (request == KDP_DATA) {
+ /* as all packets are kdp_crashdump_pkt_size in length, the last packet
+ * may end up with trailing bits. make sure that those
+ * bits aren't confusing. */
+ if (length < kdp_crashdump_pkt_size) {
+ kdp_crashdump_short_pkt++;
+ memset(th->th_data + length, 'Y',
+ kdp_crashdump_pkt_size - (uint32_t) length);
+ }
+
+ if (!kdp_machine_vm_read((mach_vm_address_t)(uintptr_t)panic_data, (caddr_t) th->th_data, length)) {
+ uintptr_t next_page = round_page((uintptr_t)panic_data);
+ memset((caddr_t) th->th_data, 'X', (size_t)length);
+ if ((next_page - ((uintptr_t) panic_data)) < length) {
+ uint64_t resid = length - (next_page - (intptr_t) panic_data);
+ if (!kdp_machine_vm_read((mach_vm_address_t)(uintptr_t)next_page, (caddr_t) th->th_data + (length - resid), resid)) {
+ memset((caddr_t) th->th_data + (length - resid), 'X', (size_t)resid);
+ }
+ }
+ }
+ }
+ else if (request == KDP_SEEK) {
+ if (kdp_feature_large_crashdumps)
+ *(uint64_t *) th->th_data = OSSwapHostToBigInt64((*(uint64_t *) panic_data));
+ else
+ *(unsigned int *) th->th_data = htonl(*(unsigned int *) panic_data);
+ }
+
+ kdp_send_data(&pkt.data[pkt.off], pkt.len);
+
+ /* Listen for the ACK */
+RECEIVE_RETRY:
+ while (!pkt.input && flag_panic_dump_in_progress && poll_count) {
+ kdp_poll();
+ poll_count--;
+ }
+
+ if (pkt.input) {
+
+ pkt.input = FALSE;
+
+ th = (struct corehdr *) &pkt.data[pkt.off];
+ if (request == KDP_WRQ) {
+ uint16_t opcode64 = ntohs(th->th_opcode);
+ uint16_t features64 = (opcode64 & 0xFF00)>>8;
+ if ((opcode64 & 0xFF) == KDP_ACK) {
+ kdp_feature_large_crashdumps = features64 & KDP_FEATURE_LARGE_CRASHDUMPS;
+ if (features64 & KDP_FEATURE_LARGE_PKT_SIZE) {
+ kdp_feature_large_pkt_size = 1;
+ }
+ else {
+ kdp_feature_large_pkt_size = 0;
+ kdp_crashdump_pkt_size = 512;
+ }
+ printf("Protocol features: 0x%x\n", (uint32_t) features64);
+ th->th_opcode = htons(KDP_ACK);
+ }
+ }
+ if (ntohs(th->th_opcode) == KDP_ACK && ntohl(th->th_block) == panic_block) {
+ }
+ else
+ if (ntohs(th->th_opcode) == KDP_ERROR) {
+ printf("Panic server returned error %d, retrying\n", ntohl(th->th_code));
+ poll_count = 1000;
+ goto TRANSMIT_RETRY;
+ }
+ else
+ if (ntohl(th->th_block) == (panic_block - 1)) {
+ printf("RX retry ");
+ if (++rretries > 1)
+ goto TRANSMIT_RETRY;
+ else
+ goto RECEIVE_RETRY;
+ }
+ }
+ else
+ if (!flag_panic_dump_in_progress) /* we received a debugging packet, bail*/
+ {
+ printf("Received a debugger packet,transferring control to debugger\n");
+ /* Configure that if not set ..*/
+ kdp_flag |= DBG_POST_CORE;
+ return (-2);
+ }
+ else /* We timed out */
+ if (0 == poll_count) {
+ poll_count = 1000;
+ kdp_us_spin ((tretries%4) * panic_timeout); /* capped linear backoff */
+ goto TRANSMIT_RETRY;
+ }
+
+ if (!(++panic_block % SBLOCKSZ)) {
+ uint64_t ctime;
+ kdb_printf_unbuffered(".");
+ ctime = mach_absolute_time();
+ kdp_superblock_dump_time = ctime - kdp_superblock_dump_start_time;
+ kdp_superblock_dump_start_time = ctime;
+ if (kdp_superblock_dump_time > kdp_max_superblock_dump_time)
+ kdp_max_superblock_dump_time = kdp_superblock_dump_time;
+ if (kdp_superblock_dump_time < kdp_min_superblock_dump_time)
+ kdp_min_superblock_dump_time = kdp_superblock_dump_time;
+ }
+
+ if (request == KDP_EOF) {
+ printf("\nTotal number of packets transmitted: %d\n", panic_block);
+ printf("Avg. superblock transfer abstime 0x%llx\n", ((mach_absolute_time() - kdp_dump_start_time) / panic_block) * SBLOCKSZ);
+ printf("Minimum superblock transfer abstime: 0x%llx\n", kdp_min_superblock_dump_time);
+ printf("Maximum superblock transfer abstime: 0x%llx\n", kdp_max_superblock_dump_time);
+ }
+ return 1;
+}
+
+static int
+isdigit (char c)
+{
+ return ((c > 47) && (c < 58));
+}
+
+/* Horrid hack to extract xnu version if possible - a much cleaner approach
+ * would be to have the integrator run a script which would copy the
+ * xnu version into a string or an int somewhere at project submission
+ * time - makes assumptions about sizeof(version), but will not fail if
+ * it changes, but may be incorrect.
+ */
+/* 2006: Incorporated a change from Darwin user P. Lovell to extract
+ * the minor kernel version numbers from the version string.
+ */
+static int
+kdp_get_xnu_version(char *versionbuf)
+{
+ char *versionpos;
+ char vstr[20];
+ int retval = -1;
+ char *vptr;
+
+ strlcpy(vstr, "custom", 10);
+ if (kdp_machine_vm_read((mach_vm_address_t)(uintptr_t)version, versionbuf, 128)) {
+ versionbuf[127] = '\0';
+ versionpos = strnstr(versionbuf, "xnu-", 115);
+ if (versionpos) {
+ strncpy(vstr, versionpos, sizeof(vstr));
+ vstr[sizeof(vstr)-1] = '\0';
+ vptr = vstr + 4; /* Begin after "xnu-" */
+ while (*vptr && (isdigit(*vptr) || *vptr == '.'))
+ vptr++;
+ *vptr = '\0';
+ /* Remove trailing period, if any */
+ if (*(--vptr) == '.')
+ *vptr = '\0';
+ retval = 0;
+ }
+ }
+ strlcpy(versionbuf, vstr, KDP_MAXPACKET);
+ return retval;
+}
+
+void
+kdp_set_dump_info(const uint32_t flags, const char *filename,
+ const char *destipstr, const char *routeripstr,
+ const uint32_t port)
+{
+ uint32_t cmd;
+
+ if (destipstr && (destipstr[0] != '\0')) {
+ strlcpy(panicd_ip_str, destipstr, sizeof(panicd_ip_str));
+ panicd_specified = 1;
+ }
+
+ if (routeripstr && (routeripstr[0] != '\0')) {
+ strlcpy(router_ip_str, routeripstr, sizeof(router_ip_str));
+ router_specified = 1;
+ }
+
+ if (filename && (filename[0] != '\0')) {
+ strlcpy(corename_str, filename, sizeof(corename_str));
+ corename_specified = TRUE;
+ } else {
+ corename_specified = FALSE;
+ }
+
+ if (port)
+ panicd_port = port;
+
+ /* on a disconnect, should we stay in KDP or not? */
+ noresume_on_disconnect = (flags & KDP_DUMPINFO_NORESUME) ? 1 : 0;
+
+ if ((flags & KDP_DUMPINFO_DUMP) == 0)
+ return;
+
+ /* the rest of the commands can modify kdp_flags */
+ cmd = flags & KDP_DUMPINFO_MASK;
+ if (cmd == KDP_DUMPINFO_DISABLE) {
+ kdp_flag &= ~KDP_PANIC_DUMP_ENABLED;
+ panicd_specified = 0;
+ kdp_trigger_core_dump = 0;
+ return;
+ }
+
+ kdp_flag &= ~REBOOT_POST_CORE;
+ if (flags & KDP_DUMPINFO_REBOOT)
+ kdp_flag |= REBOOT_POST_CORE;
+
+ kdp_flag &= ~PANIC_LOG_DUMP;
+ if (cmd == KDP_DUMPINFO_PANICLOG)
+ kdp_flag |= PANIC_LOG_DUMP;
+
+ kdp_flag &= ~SYSTEM_LOG_DUMP;
+ if (cmd == KDP_DUMPINFO_SYSTEMLOG)
+ kdp_flag |= SYSTEM_LOG_DUMP;
+
+ /* trigger a dump */
+ kdp_flag |= DBG_POST_CORE;
+
+ flag_dont_abort_panic_dump = (flags & KDP_DUMPINFO_NOINTR) ?
+ TRUE : FALSE;
+
+ reattach_wait = 1;
+ logPanicDataToScreen = 1;
+ disableConsoleOutput = 0;
+ disable_debug_output = 0;
+ kdp_trigger_core_dump = 1;
+}
+
+void
+kdp_get_dump_info(uint32_t *flags, char *filename, char *destipstr,
+ char *routeripstr, uint32_t *port)
+{
+ if (destipstr) {
+ if (panicd_specified)
+ strlcpy(destipstr, panicd_ip_str,
+ sizeof(panicd_ip_str));
+ else
+ destipstr[0] = '\0';
+ }
+
+ if (routeripstr) {
+ if (router_specified)
+ strlcpy(routeripstr, router_ip_str,
+ sizeof(router_ip_str));
+ else
+ routeripstr[0] = '\0';
+ }
+
+ if (filename) {
+ if (corename_specified)
+ strlcpy(filename, corename_str,
+ sizeof(corename_str));
+ else
+ filename[0] = '\0';
+
+ }
+
+ if (port)
+ *port = panicd_port;
+
+ if (flags) {
+ *flags = 0;
+ if (!panicd_specified)
+ *flags |= KDP_DUMPINFO_DISABLE;
+ else if (kdp_flag & PANIC_LOG_DUMP)
+ *flags |= KDP_DUMPINFO_PANICLOG;
+ else
+ *flags |= KDP_DUMPINFO_CORE;
+
+ if (noresume_on_disconnect)
+ *flags |= KDP_DUMPINFO_NORESUME;
+ }
+}
+
+
+/* Primary dispatch routine for the system dump */
+void
+kdp_panic_dump(void)
+{
+ char coreprefix[10];
+ int panic_error;
+
+ uint64_t abstime;
+ uint32_t current_ip = ntohl((uint32_t)kdp_current_ip_address);
+
+ if (flag_panic_dump_in_progress) {
+ kdb_printf("System dump aborted.\n");
+ goto panic_dump_exit;
+ }
+
+ printf("Entering system dump routine\n");
+
+ if (!kdp_en_recv_pkt || !kdp_en_send_pkt) {
+ kdb_printf("Error: No transport device registered for kernel crashdump\n");
+ return;
+ }
+
+ if (!panicd_specified) {
+ kdb_printf("A dump server was not specified in the boot-args, terminating kernel core dump.\n");
+ goto panic_dump_exit;
+ }
+
+ flag_panic_dump_in_progress = TRUE;
+
+ if (pkt.input)
+ kdp_panic("kdp_panic_dump: unexpected pending input packet");
+
+ kdp_get_xnu_version((char *) &pkt.data[0]);
+
+ if (!corename_specified) {
+ /* Panic log bit takes precedence over core dump bit */
+ if ((panicstr != (char *) 0) && (kdp_flag & PANIC_LOG_DUMP))
+ strlcpy(coreprefix, "paniclog", sizeof(coreprefix));
+ else if (kdp_flag & SYSTEM_LOG_DUMP)
+ strlcpy(coreprefix, "systemlog", sizeof(coreprefix));
+ else
+ strlcpy(coreprefix, "core", sizeof(coreprefix));
+
+ abstime = mach_absolute_time();
+ pkt.data[20] = '\0';
+ snprintf (corename_str, sizeof(corename_str), "%s-%s-%d.%d.%d.%d-%x",
+ coreprefix, &pkt.data[0],
+ (current_ip & 0xff000000) >> 24,
+ (current_ip & 0xff0000) >> 16,
+ (current_ip & 0xff00) >> 8,
+ (current_ip & 0xff),
+ (unsigned int) (abstime & 0xffffffff));
+ }
+
+ if (0 == inet_aton(panicd_ip_str, (struct kdp_in_addr *) &panic_server_ip)) {
+ kdb_printf("inet_aton() failed interpreting %s as a panic server IP\n", panicd_ip_str);
+ }
+ else
+ kdb_printf("Attempting connection to panic server configured at IP %s, port %d\n", panicd_ip_str, panicd_port);
+
+ destination_mac = router_mac;
+
+ if (kdp_arp_resolve(panic_server_ip, &temp_mac)) {
+ kdb_printf("Resolved %s's (or proxy's) link level address\n", panicd_ip_str);
+ destination_mac = temp_mac;
+ }
+ else {
+ if (!flag_panic_dump_in_progress) goto panic_dump_exit;
+ if (router_specified) {
+ if (0 == inet_aton(router_ip_str, (struct kdp_in_addr *) &parsed_router_ip))
+ kdb_printf("inet_aton() failed interpreting %s as an IP\n", router_ip_str);
+ else {
+ router_ip = parsed_router_ip;
+ if (kdp_arp_resolve(router_ip, &temp_mac)) {
+ destination_mac = temp_mac;
+ kdb_printf("Routing through specified router IP %s (%d)\n", router_ip_str, router_ip);
+ }
+ }
+ }
+ }
+
+ if (!flag_panic_dump_in_progress) goto panic_dump_exit;
+
+ kdb_printf("Transmitting packets to link level address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ destination_mac.ether_addr_octet[0] & 0xff,
+ destination_mac.ether_addr_octet[1] & 0xff,
+ destination_mac.ether_addr_octet[2] & 0xff,
+ destination_mac.ether_addr_octet[3] & 0xff,
+ destination_mac.ether_addr_octet[4] & 0xff,
+ destination_mac.ether_addr_octet[5] & 0xff);
+
+ kdb_printf("Kernel map size is %llu\n", (unsigned long long) get_vmmap_size(kernel_map));
+ kdb_printf("Sending write request for %s\n", corename_str);
+
+ if ((panic_error = kdp_send_crashdump_pkt(KDP_WRQ, corename_str, 0 , NULL)) < 0) {
+ kdb_printf ("kdp_send_crashdump_pkt failed with error %d\n", panic_error);
+ goto panic_dump_exit;
+ }
+
+ /* Just the panic log requested */
+ if ((panicstr != (char *) 0) && (kdp_flag & PANIC_LOG_DUMP)) {
+ kdb_printf_unbuffered("Transmitting panic log, please wait: ");
+ kdp_send_crashdump_data(KDP_DATA, corename_str,
+ debug_buf_ptr - debug_buf,
+ debug_buf);
+ kdp_send_crashdump_pkt (KDP_EOF, NULL, 0, ((void *) 0));
+ printf("Please file a bug report on this panic, if possible.\n");
+ goto panic_dump_exit;
+ }
+
+ /* maybe we wanted the systemlog */
+ if (kdp_flag & SYSTEM_LOG_DUMP) {
+ long start_off = msgbufp->msg_bufx;
+ long len;
+
+ kdb_printf_unbuffered("Transmitting system log, please wait: ");
+ if (start_off >= msgbufp->msg_bufr) {
+ len = msgbufp->msg_size - start_off;
+ kdp_send_crashdump_data(KDP_DATA, corename_str, len,
+ msgbufp->msg_bufc + start_off);
+ /* seek to remove trailing bytes */
+ kdp_send_crashdump_seek(corename_str, len);
+ start_off = 0;
+ }
+
+ if (start_off != msgbufp->msg_bufr) {
+ len = msgbufp->msg_bufr - start_off;
+ kdp_send_crashdump_data(KDP_DATA, corename_str, len,
+ msgbufp->msg_bufc + start_off);
+ }
+
+ kdp_send_crashdump_pkt (KDP_EOF, NULL, 0, ((void *) 0));
+ goto panic_dump_exit;
+ }
+
+ /* We want a core dump if we're here */
+ kern_dump();
+
+panic_dump_exit:
+ abort_panic_transfer();
+ kdp_reset();
+ return;
+}
+
+void
+abort_panic_transfer(void)
+{
+ flag_panic_dump_in_progress = FALSE;
+ flag_dont_abort_panic_dump = FALSE;
+ panic_block = 0;
+}
+
+#if CONFIG_SERIAL_KDP
+
+static boolean_t needs_serial_init = TRUE;
+
+static void
+kdp_serial_send(void *rpkt, unsigned int rpkt_len)
+{
+ // printf("tx\n");
+ kdp_serialize_packet((unsigned char *)rpkt, rpkt_len, pal_serial_putc);
+}
+
+static void
+kdp_serial_receive(void *rpkt, unsigned int *rpkt_len, unsigned int timeout)
+{
+ int readkar;
+ uint64_t now, deadline;
+
+ clock_interval_to_deadline(timeout, 1000 * 1000 /* milliseconds */, &deadline);
+
+// printf("rx\n");
+ for(clock_get_uptime(&now); now < deadline; clock_get_uptime(&now))
+ {
+ readkar = pal_serial_getc();
+ if(readkar >= 0)
+ {
+ unsigned char *packet;
+ // printf("got char %02x\n", readkar);
+ if((packet = kdp_unserialize_packet(readkar,rpkt_len)))
+ {
+ memcpy(rpkt, packet, *rpkt_len);
+ return;
+ }
+ }
+ }
+ *rpkt_len = 0;
+}
+
+static boolean_t
+kdp_serial_setmode(boolean_t active)
+{
+ if (active == FALSE) /* leaving KDP */
+ return TRUE;
+
+ if (!needs_serial_init)
+ return TRUE;
+
+ pal_serial_init();
+ needs_serial_init = FALSE;
+ return TRUE;
+}
+
+
+static void kdp_serial_callout(__unused void *arg, kdp_event_t event)
+{
+ /* When we stop KDP, set the bit to re-initialize the console serial port
+ * the next time we send/receive a KDP packet. We don't do it on
+ * KDP_EVENT_ENTER directly because it also gets called when we trap to KDP
+ * for non-external debugging, i.e., stackshot or core dumps.
+ *
+ * Set needs_serial_init on exit (and initialization, see above) and not
+ * enter because enter is sent multiple times and causes excess reinitialization.
+ */
+
+ switch (event)
+ {
+ case KDP_EVENT_PANICLOG:
+ case KDP_EVENT_ENTER:
+ break;
+ case KDP_EVENT_EXIT:
+ needs_serial_init = TRUE;
+ break;
+ }
+}
+
+#endif /* CONFIG_SERIAL_KDP */
+
+void
+kdp_init(void)
+{
+ strlcpy(kdp_kernelversion_string, version, sizeof(kdp_kernelversion_string));
+
+ /* Relies on platform layer calling panic_init() before kdp_init() */
+ if (kernel_uuid_string[0] != '\0') {
+ /*
+ * Update kdp_kernelversion_string with our UUID
+ * generated at link time.
+ */
+
+ strlcat(kdp_kernelversion_string, "; UUID=", sizeof(kdp_kernelversion_string));
+ strlcat(kdp_kernelversion_string, kernel_uuid_string, sizeof(kdp_kernelversion_string));
+ }
+
+ debug_log_init();
+
+#if defined(__x86_64__) || defined(__arm__)
+ if (vm_kernel_slide) {
+ char KASLR_stext[19];
+ strlcat(kdp_kernelversion_string, "; stext=", sizeof(kdp_kernelversion_string));
+ snprintf(KASLR_stext, sizeof(KASLR_stext), "%p", (void *) vm_kernel_stext);
+ strlcat(kdp_kernelversion_string, KASLR_stext, sizeof(kdp_kernelversion_string));
+ }
+#endif
+
+ if (debug_boot_arg & DB_REBOOT_POST_CORE)
+ kdp_flag |= REBOOT_POST_CORE;
+#if defined(__x86_64__)
+ kdp_machine_init();
+#endif
+
+ kdp_timer_callout_init();
+ kdp_crashdump_feature_mask = htonl(kdp_crashdump_feature_mask);
+
+#if CONFIG_SERIAL_KDP
+ char kdpname[80];
+ struct kdp_in_addr ipaddr;
+ struct kdp_ether_addr macaddr;
+
+
+ // serial must be explicitly requested
+ if(!PE_parse_boot_argn("kdp_match_name", kdpname, sizeof(kdpname)) || strncmp(kdpname, "serial", sizeof(kdpname)) != 0)
+ return;
+
+ kprintf("Initializing serial KDP\n");
+
+ kdp_register_callout(kdp_serial_callout, NULL);
+ kdp_register_link(NULL, kdp_serial_setmode);
+ kdp_register_send_receive(kdp_serial_send, kdp_serial_receive);
+
+ /* fake up an ip and mac for early serial debugging */
+ macaddr.ether_addr_octet[0] = 's';
+ macaddr.ether_addr_octet[1] = 'e';
+ macaddr.ether_addr_octet[2] = 'r';
+ macaddr.ether_addr_octet[3] = 'i';
+ macaddr.ether_addr_octet[4] = 'a';
+ macaddr.ether_addr_octet[5] = 'l';
+ ipaddr.s_addr = KDP_SERIAL_IPADDR;
+ kdp_set_ip_and_mac_addresses(&ipaddr, &macaddr);
+
+#endif /* CONFIG_SERIAL_KDP */
+}
projects / apple / xnu.git / blobdiff