/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * * Copyright 2018 Joyent, Inc. */ /* * Kernel/Debugger Interface (KDI) routines. Called during debugger under * various system states (boot, while running, while the debugger has control). * Functions intended for use while the debugger has control may not grab any * locks or perform any functions that assume the availability of other system * services. */ #include <sys/systm.h> #include <sys/x86_archext.h> #include <sys/kdi_impl.h> #include <sys/smp_impldefs.h> #include <sys/psm_types.h> #include <sys/segments.h> #include <sys/archsystm.h> #include <sys/controlregs.h> #include <sys/trap.h> #include <sys/kobj.h> #include <sys/kobj_impl.h> #include <sys/clock_impl.h> static void kdi_system_claim(void) { lbolt_debug_entry(); psm_notifyf(PSM_DEBUG_ENTER); } static void kdi_system_release(void) { psm_notifyf(PSM_DEBUG_EXIT); lbolt_debug_return(); } static cpu_t * kdi_gdt2cpu(uintptr_t gdtbase) { cpu_t *cp = cpu_list; if (cp == NULL) return (NULL); do { if (gdtbase == (uintptr_t)cp->cpu_gdt) return (cp); } while ((cp = cp->cpu_next) != cpu_list); return (NULL); } uintptr_t kdi_gdt2gsbase(uintptr_t gdtbase) { return ((uintptr_t)kdi_gdt2cpu(gdtbase)); } static uintptr_t kdi_get_userlimit(void) { return (_userlimit); } static int kdi_get_cpuinfo(uint_t *vendorp, uint_t *familyp, uint_t *modelp) { desctbr_t gdtr; cpu_t *cpu; /* * CPU doesn't work until the GDT and gs/GSBASE have been set up. * Boot-loaded kmdb will call us well before then, so we have to * find the current cpu_t the hard way. */ rd_gdtr(&gdtr); if ((cpu = kdi_gdt2cpu(gdtr.dtr_base)) == NULL || !cpuid_checkpass(cpu, 1)) return (EAGAIN); /* cpuid isn't done yet */ *vendorp = cpuid_getvendor(cpu); *familyp = cpuid_getfamily(cpu); *modelp = cpuid_getmodel(cpu); return (0); } void kdi_idtr_set(gate_desc_t *idt, size_t limit) { desctbr_t idtr; /* * This rare case could happen if we entered kmdb whilst still on the * fake CPU set up by boot_kdi_tmpinit(). We're trying to restore the * kernel's IDT that we saved on entry, but it was from the fake cpu_t * rather than the real IDT (which is still boot's). It's unpleasant, * but we just encode knowledge that it's idt0 we want to restore. */ if (idt == NULL) idt = idt0; CPU->cpu_m.mcpu_idt = idt; idtr.dtr_base = (uintptr_t)idt; idtr.dtr_limit = limit; kdi_idtr_write(&idtr); } static void kdi_plat_call(void (*platfn)(void)) { if (platfn != NULL) platfn(); } /* * On Intel, most of these are shared between i86*, so this is really an * arch_kdi_init(). */ void mach_kdi_init(kdi_t *kdi) { kdi->kdi_plat_call = kdi_plat_call; kdi->kdi_kmdb_enter = kmdb_enter; kdi->mkdi_activate = kdi_activate; kdi->mkdi_deactivate = kdi_deactivate; kdi->mkdi_idt_switch = kdi_idt_switch; kdi->mkdi_update_drreg = kdi_update_drreg; kdi->mkdi_get_userlimit = kdi_get_userlimit; kdi->mkdi_get_cpuinfo = kdi_get_cpuinfo; kdi->mkdi_stop_slaves = kdi_stop_slaves; kdi->mkdi_start_slaves = kdi_start_slaves; kdi->mkdi_slave_wait = kdi_slave_wait; kdi->mkdi_memrange_add = kdi_memrange_add; kdi->mkdi_reboot = kdi_reboot; } void plat_kdi_init(kdi_t *kdi) { kdi->pkdi_system_claim = kdi_system_claim; kdi->pkdi_system_release = kdi_system_release; }