2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #include <palacios/vmm_debug.h>
22 #include <palacios/vmm.h>
23 #include <palacios/vmm_host_events.h>
24 #include <palacios/vm_guest.h>
25 #include <palacios/vmm_decoder.h>
26 #include <palacios/vm_guest_mem.h>
28 #define PRINT_TELEMETRY 1
29 #define PRINT_CORE_STATE 2
30 #define PRINT_ARCH_STATE 3
32 #define PRINT_BACKTRACE 5
35 #define PRINT_ALL 100 // Absolutely everything
36 #define PRINT_STATE 101 // telemetry, core state, arch state
41 static int core_handler(struct guest_info * core, uint32_t cmd) {
46 v3_print_core_telemetry(core);
49 case PRINT_CORE_STATE:
50 v3_raise_barrier(core->vm_info, NULL);
52 v3_print_guest_state(core);
54 v3_lower_barrier(core->vm_info);
56 case PRINT_ARCH_STATE:
57 v3_raise_barrier(core->vm_info, NULL);
59 v3_print_arch_state(core);
61 v3_lower_barrier(core->vm_info);
64 v3_raise_barrier(core->vm_info, NULL);
68 v3_lower_barrier(core->vm_info);
71 v3_raise_barrier(core->vm_info, NULL);
73 v3_print_backtrace(core);
75 v3_lower_barrier(core->vm_info);
79 v3_raise_barrier(core->vm_info, NULL);
81 v3_print_core_telemetry(core);
82 v3_print_guest_state(core);
83 v3_print_arch_state(core);
85 v3_lower_barrier(core->vm_info);
94 static int evt_handler(struct v3_vm_info * vm, struct v3_debug_event * evt, void * priv_data) {
96 V3_Print("Debug Event Handler for core %d\n", evt->core_id);
98 if (evt->core_id == -1) {
100 for (i = 0; i < vm->num_cores; i++) {
101 core_handler(&(vm->cores[i]), evt->cmd);
104 return core_handler(&vm->cores[evt->core_id], evt->cmd);
112 int v3_init_vm_debugging(struct v3_vm_info * vm) {
113 v3_hook_host_event(vm, HOST_DEBUG_EVT,
114 V3_HOST_EVENT_HANDLER(evt_handler),
125 void v3_print_segments(struct v3_segments * segs) {
127 struct v3_segment * seg_ptr;
129 seg_ptr=(struct v3_segment *)segs;
131 char *seg_names[] = {"CS", "DS" , "ES", "FS", "GS", "SS" , "LDTR", "GDTR", "IDTR", "TR", NULL};
132 V3_Print("Segments\n");
134 for (i = 0; seg_names[i] != NULL; i++) {
136 V3_Print("\t%s: Sel=%x, base=%p, limit=%x (long_mode=%d, db=%d)\n", seg_names[i], seg_ptr[i].selector,
137 (void *)(addr_t)seg_ptr[i].base, seg_ptr[i].limit,
138 seg_ptr[i].long_mode, seg_ptr[i].db);
145 void v3_print_ctrl_regs(struct guest_info * core) {
146 struct v3_ctrl_regs * regs = &(core->ctrl_regs);
149 char * reg_names[] = {"CR0", "CR2", "CR3", "CR4", "CR8", "FLAGS", "EFER", NULL};
152 reg_ptr = (v3_reg_t *)regs;
154 V3_Print("Ctrl Regs:\n");
156 for (i = 0; reg_names[i] != NULL; i++) {
157 V3_Print("\t%s=0x%p (at %p)\n", reg_names[i], (void *)(addr_t)reg_ptr[i], &(reg_ptr[i]));
164 static int safe_gva_to_hva(struct guest_info * core, addr_t linear_addr, addr_t * host_addr) {
165 /* select the proper translation based on guest mode */
166 if (core->mem_mode == PHYSICAL_MEM) {
167 if (v3_gpa_to_hva(core, linear_addr, host_addr) == -1) return -1;
168 } else if (core->mem_mode == VIRTUAL_MEM) {
169 if (v3_gva_to_hva(core, linear_addr, host_addr) == -1) return -1;
174 static int v3_print_disassembly(struct guest_info * core) {
176 addr_t rip, rip_linear, rip_host;
178 /* we don't know where the instructions preceding RIP start, so we just take
179 * a guess and hope the instruction stream synced up with our disassembly
180 * some time before RIP; if it has not we correct RIP at that point
183 /* start disassembly 64 bytes before current RIP, continue 32 bytes after */
184 rip = (addr_t) core->rip - 64;
185 while ((int) (rip - core->rip) < 32) {
186 V3_Print("disassembly step\n");
188 /* always print RIP, even if the instructions before were bad */
189 if (!passed_rip && rip >= core->rip) {
190 if (rip != core->rip) {
191 V3_Print("***** bad disassembly up to this point *****\n");
197 /* look up host virtual address for this instruction */
198 rip_linear = get_addr_linear(core, rip, &(core->segments.cs));
199 if (safe_gva_to_hva(core, rip_linear, &rip_host) < 0) {
204 /* print disassembled instrcution (updates rip) */
205 if (v3_disasm(core, (void *) rip_host, &rip, rip == core->rip) < 0) {
217 void v3_print_guest_state(struct guest_info * core) {
218 addr_t linear_addr = 0;
220 V3_Print("RIP: %p\n", (void *)(addr_t)(core->rip));
221 linear_addr = get_addr_linear(core, core->rip, &(core->segments.cs));
222 V3_Print("RIP Linear: %p\n", (void *)linear_addr);
224 V3_Print("NumExits: %u\n", (uint32_t)core->num_exits);
226 V3_Print("IRQ STATE: started=%d, pending=%d\n",
227 core->intr_core_state.irq_started,
228 core->intr_core_state.irq_pending);
229 V3_Print("EXCP STATE: err_code_valid=%d, err_code=%x\n",
230 core->excp_state.excp_error_code_valid,
231 core->excp_state.excp_error_code);
234 v3_print_segments(&(core->segments));
235 v3_print_ctrl_regs(core);
237 if (core->shdw_pg_mode == SHADOW_PAGING) {
238 V3_Print("Shadow Paging Guest Registers:\n");
239 V3_Print("\tGuest CR0=%p\n", (void *)(addr_t)(core->shdw_pg_state.guest_cr0));
240 V3_Print("\tGuest CR3=%p\n", (void *)(addr_t)(core->shdw_pg_state.guest_cr3));
241 V3_Print("\tGuest EFER=%p\n", (void *)(addr_t)(core->shdw_pg_state.guest_efer.value));
246 v3_print_mem_map(core->vm_info);
248 v3_print_stack(core);
250 // v3_print_disassembly(core);
254 void v3_print_arch_state(struct guest_info * core) {
260 void v3_print_guest_state_all(struct v3_vm_info * vm) {
263 V3_Print("VM Core states for %s\n", vm->name);
265 for (i = 0; i < 80; i++) {
269 for (i = 0; i < vm->num_cores; i++) {
270 v3_print_guest_state(&vm->cores[i]);
273 for (i = 0; i < 80; i++) {
282 void v3_print_stack(struct guest_info * core) {
283 addr_t linear_addr = 0;
284 addr_t host_addr = 0;
286 v3_cpu_mode_t cpu_mode = v3_get_vm_cpu_mode(core);
288 linear_addr = get_addr_linear(core, core->vm_regs.rsp, &(core->segments.ss));
290 V3_Print("Stack at %p:\n", (void *)linear_addr);
292 if (core->mem_mode == PHYSICAL_MEM) {
293 if (v3_gpa_to_hva(core, linear_addr, &host_addr) == -1) {
294 PrintError("Could not translate Stack address\n");
297 } else if (core->mem_mode == VIRTUAL_MEM) {
298 if (v3_gva_to_hva(core, linear_addr, &host_addr) == -1) {
299 PrintError("Could not translate Virtual Stack address\n");
304 V3_Print("Host Address of rsp = 0x%p\n", (void *)host_addr);
306 // We start i at one because the current stack pointer points to an unused stack element
307 for (i = 0; i <= 24; i++) {
309 if (cpu_mode == REAL) {
310 V3_Print("\t0x%.4x\n", *((uint16_t *)host_addr + (i * 2)));
311 } else if (cpu_mode == LONG) {
312 V3_Print("\t%p\n", (void *)*(addr_t *)(host_addr + (i * 8)));
315 V3_Print("\t0x%.8x\n", *(uint32_t *)(host_addr + (i * 4)));
322 void v3_print_backtrace(struct guest_info * core) {
325 v3_cpu_mode_t cpu_mode = v3_get_vm_cpu_mode(core);
327 V3_Print("Performing Backtrace for Core %d\n", core->vcpu_id);
328 V3_Print("\tRSP=%p, RBP=%p\n", (void *)core->vm_regs.rsp, (void *)core->vm_regs.rbp);
330 gla_rbp = get_addr_linear(core, core->vm_regs.rbp, &(core->segments.ss));
332 for (i = 0; i < 10; i++) {
336 if (core->mem_mode == PHYSICAL_MEM) {
337 if (v3_gpa_to_hva(core, gla_rbp, &hva_rbp) == -1) {
338 PrintError("Could not translate Stack address\n");
341 } else if (core->mem_mode == VIRTUAL_MEM) {
342 if (v3_gva_to_hva(core, gla_rbp, &hva_rbp) == -1) {
343 PrintError("Could not translate Virtual Stack address\n");
348 hva_rip = hva_rbp + v3_get_addr_width(core);
351 if (cpu_mode == REAL) {
352 V3_Print("Next RBP=0x%.4x, RIP=0x%.4x\n", *(uint16_t *)hva_rbp,*(uint16_t *)hva_rip);
353 gla_rbp = *(uint16_t *)hva_rbp;
354 } else if (cpu_mode == LONG) {
355 V3_Print("Next RBP=%p, RIP=%p\n", (void *)*(uint64_t *)hva_rbp, (void *)*(uint64_t *)hva_rip);
356 gla_rbp = *(uint64_t *)hva_rbp;
358 V3_Print("Next RBP=0x%.8x, RIP=0x%.8x\n", *(uint32_t *)hva_rbp, *(uint32_t *)hva_rip);
359 gla_rbp = *(uint32_t *)hva_rbp;
367 void v3_print_GPRs(struct guest_info * core) {
368 struct v3_gprs * regs = &(core->vm_regs);
371 char * reg_names[] = { "RDI", "RSI", "RBP", "RSP", "RBX", "RDX", "RCX", "RAX", NULL};
373 reg_ptr = (v3_reg_t *)regs;
375 V3_Print("32 bit GPRs:\n");
377 for (i = 0; reg_names[i] != NULL; i++) {
378 V3_Print("\t%s=0x%p (at %p)\n", reg_names[i], (void *)(addr_t)reg_ptr[i], &(reg_ptr[i]));
384 void v3_print_GPRs(struct guest_info * core) {
385 struct v3_gprs * regs = &(core->vm_regs);
388 char * reg_names[] = { "RDI", "RSI", "RBP", "RSP", "RBX", "RDX", "RCX", "RAX", \
389 "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15", NULL};
391 reg_ptr = (v3_reg_t *)regs;
393 V3_Print("64 bit GPRs:\n");
395 for (i = 0; reg_names[i] != NULL; i++) {
396 V3_Print("\t%s=0x%p (at %p)\n", reg_names[i], (void *)(addr_t)reg_ptr[i], &(reg_ptr[i]));