291 lines
8.5 KiB
C
291 lines
8.5 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <hypervisor.h>
|
|
|
|
/*
|
|
* readable exception descriptors.
|
|
*/
|
|
static const char *const excp_names[32] = {
|
|
[0] = "Divide Error",
|
|
[1] = "RESERVED",
|
|
[2] = "NMI",
|
|
[3] = "Breakpoint",
|
|
[4] = "Overflow",
|
|
[5] = "BOUND range exceeded",
|
|
[6] = "Invalid Opcode",
|
|
[7] = "Device Not Available",
|
|
[8] = "Double Fault",
|
|
[9] = "Coprocessor Segment Overrun",
|
|
[10] = "Invalid TSS",
|
|
[11] = "Segment Not Present",
|
|
[12] = "Stack Segment Fault",
|
|
[13] = "General Protection",
|
|
[14] = "Page Fault",
|
|
[15] = "Intel Reserved",
|
|
[16] = "x87 FPU Floating Point Error",
|
|
[17] = "Alignment Check",
|
|
[18] = "Machine Check",
|
|
[19] = "SIMD Floating Point Exception",
|
|
[20] = "Virtualization Exception",
|
|
[21] = "Intel Reserved",
|
|
[22] = "Intel Reserved",
|
|
[23] = "Intel Reserved",
|
|
[24] = "Intel Reserved",
|
|
[25] = "Intel Reserved",
|
|
[26] = "Intel Reserved",
|
|
[27] = "Intel Reserved",
|
|
[28] = "Intel Reserved",
|
|
[29] = "Intel Reserved",
|
|
[30] = "Intel Reserved",
|
|
[31] = "Intel Reserved"
|
|
};
|
|
|
|
/* Global variable for save registers on exception */
|
|
static struct intr_excp_ctx *crash_ctx;
|
|
|
|
static void dump_guest_reg(struct vcpu *vcpu)
|
|
{
|
|
printf("\n\n================================================");
|
|
printf("================================\n\n");
|
|
printf("Guest Registers:\r\n");
|
|
printf("= VM ID %d ==== vCPU ID %hu === pCPU ID %d ===="
|
|
"world %d =============\r\n",
|
|
vcpu->vm->vm_id, vcpu->vcpu_id, vcpu->pcpu_id,
|
|
vcpu->arch_vcpu.cur_context);
|
|
printf("= RIP=0x%016llx RSP=0x%016llx "
|
|
"RFLAGS=0x%016llx\r\n",
|
|
vcpu_get_rip(vcpu),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RSP),
|
|
vcpu_get_rflags(vcpu));
|
|
printf("= CR0=0x%016llx CR2=0x%016llx "
|
|
" CR3=0x%016llx\r\n",
|
|
vcpu_get_cr0(vcpu),
|
|
vcpu_get_cr2(vcpu),
|
|
exec_vmread(VMX_GUEST_CR3));
|
|
printf("= RAX=0x%016llx RBX=0x%016llx "
|
|
"RCX=0x%016llx\r\n",
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RAX),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RBX),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RCX));
|
|
printf("= RDX=0x%016llx RDI=0x%016llx "
|
|
"RSI=0x%016llx\r\n",
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RDX),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RDI),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RSI));
|
|
printf("= RBP=0x%016llx R8=0x%016llx "
|
|
"R9=0x%016llx\r\n",
|
|
vcpu_get_gpreg(vcpu, CPU_REG_RBP),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R8),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R9));
|
|
printf("= R10=0x%016llx R11=0x%016llx "
|
|
"R12=0x%016llx\r\n",
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R10),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R11),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R12));
|
|
printf("= R13=0x%016llx R14=0x%016llx "
|
|
"R15=0x%016llx\r\n",
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R13),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R14),
|
|
vcpu_get_gpreg(vcpu, CPU_REG_R15));
|
|
printf("\r\n");
|
|
}
|
|
|
|
static void dump_guest_stack(struct vcpu *vcpu)
|
|
{
|
|
uint32_t i;
|
|
uint64_t tmp[DUMP_STACK_SIZE], fault_addr;
|
|
uint32_t err_code = 0U;
|
|
|
|
if (copy_from_gva(vcpu, tmp, vcpu_get_gpreg(vcpu, CPU_REG_RSP),
|
|
DUMP_STACK_SIZE, &err_code, &fault_addr) < 0) {
|
|
printf("\r\nUnabled to Copy Guest Stack:\r\n");
|
|
return;
|
|
}
|
|
|
|
printf("\r\nGuest Stack:\r\n");
|
|
printf("Dump stack for vcpu %hu, from gva 0x%016llx\r\n",
|
|
vcpu->vcpu_id, vcpu_get_gpreg(vcpu, CPU_REG_RSP));
|
|
for (i = 0U; i < (DUMP_STACK_SIZE >> 5U); i++) {
|
|
printf("guest_rsp(0x%llx): 0x%016llx 0x%016llx "
|
|
"0x%016llx 0x%016llx\r\n",
|
|
(vcpu_get_gpreg(vcpu, CPU_REG_RSP)+(i*32U)),
|
|
tmp[i*4], tmp[(i*4)+1],
|
|
tmp[(i*4)+2], tmp[(i*4)+3]);
|
|
}
|
|
printf("\r\n");
|
|
}
|
|
|
|
static void show_guest_call_trace(struct vcpu *vcpu)
|
|
{
|
|
uint64_t bp;
|
|
uint64_t count = 0UL;
|
|
int err;
|
|
uint32_t err_code;
|
|
|
|
bp = vcpu_get_gpreg(vcpu, CPU_REG_RBP);
|
|
printf("Guest Call Trace: **************************************\r\n");
|
|
printf("Maybe the call trace is not accurate, pls check stack!!\r\n");
|
|
/* if enable compiler option(no-omit-frame-pointer) the stack layout
|
|
* should be like this when call a function for x86_64
|
|
*
|
|
* | |
|
|
* rbp+8 | return address |
|
|
* rbp | rbp | push rbp
|
|
* | | mov rsp rbp
|
|
*
|
|
* rsp | |
|
|
*
|
|
* try to print out call trace,here can not check if the rbp is valid
|
|
* if the address is invalid, it will cause hv page fault
|
|
* then halt system */
|
|
while ((count < CALL_TRACE_HIERARCHY_MAX) && (bp != 0UL)) {
|
|
uint64_t parent_bp = 0UL, fault_addr;
|
|
|
|
err_code = 0U;
|
|
err = copy_from_gva(vcpu, &parent_bp, bp, sizeof(parent_bp),
|
|
&err_code, &fault_addr);
|
|
if (err < 0) {
|
|
printf("\r\nUnabled to get Guest parent BP\r\n");
|
|
return;
|
|
}
|
|
|
|
printf("BP_GVA(0x%016llx) RIP=0x%016llx\r\n", bp, parent_bp);
|
|
/* Get previous rbp*/
|
|
bp = parent_bp;
|
|
count++;
|
|
}
|
|
printf("\r\n");
|
|
}
|
|
|
|
static void dump_guest_context(uint16_t pcpu_id)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
vcpu = per_cpu(vcpu, pcpu_id);
|
|
if (vcpu != NULL) {
|
|
dump_guest_reg(vcpu);
|
|
dump_guest_stack(vcpu);
|
|
show_guest_call_trace(vcpu);
|
|
}
|
|
}
|
|
|
|
static void show_host_call_trace(uint64_t rsp, uint64_t rbp_arg, uint16_t pcpu_id)
|
|
{
|
|
uint64_t rbp = rbp_arg;
|
|
uint32_t i = 0U;
|
|
uint32_t cb_hierarchy = 0U;
|
|
uint64_t *sp = (uint64_t *)rsp;
|
|
|
|
printf("\r\nHost Stack: CPU_ID = %hu\r\n", pcpu_id);
|
|
for (i = 0U; i < (DUMP_STACK_SIZE >> 5U); i++) {
|
|
printf("addr(0x%llx) 0x%016llx 0x%016llx 0x%016llx "
|
|
"0x%016llx\r\n", (rsp + (i * 32U)), sp[i * 4U],
|
|
sp[(i * 4U) + 1U], sp[(i * 4U) + 2U],
|
|
sp[(i * 4U) + 3U]);
|
|
}
|
|
printf("\r\n");
|
|
|
|
printf("Host Call Trace:\r\n");
|
|
if ((rsp >
|
|
(uint64_t)&per_cpu(stack, pcpu_id)[CONFIG_STACK_SIZE - 1])
|
|
|| (rsp < (uint64_t)&per_cpu(stack, pcpu_id)[0])) {
|
|
return;
|
|
}
|
|
|
|
/* if enable compiler option(no-omit-frame-pointer) the stack layout
|
|
* should be like this when call a function for x86_64
|
|
*
|
|
* | |
|
|
* rbp+8 | return address |
|
|
* rbp | rbp | push rbp
|
|
* | | mov rsp rbp
|
|
*
|
|
* rsp | |
|
|
*
|
|
*
|
|
* if the address is invalid, it will cause hv page fault
|
|
* then halt system */
|
|
while ((rbp <=
|
|
(uint64_t)&per_cpu(stack, pcpu_id)[CONFIG_STACK_SIZE - 1])
|
|
&& (rbp >= (uint64_t)&per_cpu(stack, pcpu_id)[0])
|
|
&& (cb_hierarchy < CALL_TRACE_HIERARCHY_MAX)) {
|
|
printf("----> 0x%016llx\r\n",
|
|
*(uint64_t *)(rbp + sizeof(uint64_t)));
|
|
if (*(uint64_t *)(rbp + (2U*sizeof(uint64_t)))
|
|
== SP_BOTTOM_MAGIC) {
|
|
break;
|
|
}
|
|
rbp = *(uint64_t *)rbp;
|
|
cb_hierarchy++;
|
|
}
|
|
printf("\r\n");
|
|
}
|
|
|
|
void asm_assert(int32_t line, const char *file, const char *txt)
|
|
{
|
|
uint16_t pcpu_id = get_cpu_id();
|
|
uint64_t rsp = cpu_rsp_get();
|
|
uint64_t rbp = cpu_rbp_get();
|
|
|
|
printf("Assertion failed in file %s,line %d : %s",
|
|
file, line, txt);
|
|
show_host_call_trace(rsp, rbp, pcpu_id);
|
|
dump_guest_context(pcpu_id);
|
|
do {
|
|
asm volatile ("pause" ::: "memory");
|
|
} while (1);
|
|
}
|
|
|
|
void dump_intr_excp_frame(struct intr_excp_ctx *ctx)
|
|
{
|
|
const char *name = "Not defined";
|
|
|
|
printf("\n\n================================================");
|
|
printf("================================\n=\n");
|
|
if (ctx->vector < 0x20UL) {
|
|
name = excp_names[ctx->vector];
|
|
printf("= Unhandled exception: %d (%s)\n", ctx->vector, name);
|
|
}
|
|
|
|
/* Dump host register*/
|
|
printf("\r\nHost Registers:\r\n");
|
|
printf("= Vector=0x%016llX RIP=0x%016llX\n",
|
|
ctx->vector, ctx->rip);
|
|
printf("= RAX=0x%016llX RBX=0x%016llX RCX=0x%016llX\n",
|
|
ctx->gp_regs.rax, ctx->gp_regs.rbx, ctx->gp_regs.rcx);
|
|
printf("= RDX=0x%016llX RDI=0x%016llX RSI=0x%016llX\n",
|
|
ctx->gp_regs.rdx, ctx->gp_regs.rdi, ctx->gp_regs.rsi);
|
|
printf("= RSP=0x%016llX RBP=0x%016llX RBX=0x%016llX\n",
|
|
ctx->gp_regs.rsp, ctx->gp_regs.rbp, ctx->gp_regs.rbx);
|
|
printf("= R8=0x%016llX R9=0x%016llX R10=0x%016llX\n",
|
|
ctx->gp_regs.r8, ctx->gp_regs.r9, ctx->gp_regs.r10);
|
|
printf("= R11=0x%016llX R12=0x%016llX R13=0x%016llX\n",
|
|
ctx->gp_regs.r11, ctx->gp_regs.r12, ctx->gp_regs.r13);
|
|
printf("= RFLAGS=0x%016llX R14=0x%016llX R15=0x%016llX\n",
|
|
ctx->rflags, ctx->gp_regs.r14, ctx->gp_regs.r15);
|
|
printf("= ERRCODE=0x%016llX CS=0x%016llX SS=0x%016llX\n",
|
|
ctx->error_code, ctx->cs, ctx->ss);
|
|
printf("\r\n");
|
|
|
|
printf("=====================================================");
|
|
printf("===========================\n");
|
|
}
|
|
|
|
void dump_exception(struct intr_excp_ctx *ctx, uint16_t pcpu_id)
|
|
{
|
|
/* Dump host context */
|
|
dump_intr_excp_frame(ctx);
|
|
/* Show host stack */
|
|
show_host_call_trace(ctx->gp_regs.rsp, ctx->gp_regs.rbp, pcpu_id);
|
|
/* Dump guest context */
|
|
dump_guest_context(pcpu_id);
|
|
|
|
/* Save registers*/
|
|
crash_ctx = ctx;
|
|
cache_flush_invalidate_all();
|
|
}
|