294 lines
8.4 KiB
C
294 lines
8.4 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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/*
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* readable exception descriptors.
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*/
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static const char *const excp_names[] = {
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[0] = "Divide Error",
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[1] = "RESERVED",
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[2] = "NMI",
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[3] = "Breakpoint",
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[4] = "Overflow",
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[5] = "BOUND range exceeded",
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[6] = "Invalid Opcode",
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[7] = "Device Not Available",
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[8] = "Double Fault",
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[9] = "Coprocessor Segment Overrun",
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[10] = "Invalid TSS",
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[11] = "Segment Not Present",
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[12] = "Stack Segment Fault",
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[13] = "General Protection",
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[14] = "Page Fault",
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[15] = "Intel Reserved",
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[16] = "x87 FPU Floating Point Error",
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[17] = "Alignment Check",
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[18] = "Machine Check",
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[19] = "SIMD Floating Point Exception",
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[20] = "Virtualization Exception",
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[21] = "Intel Reserved",
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[22] = "Intel Reserved",
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[23] = "Intel Reserved",
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[24] = "Intel Reserved",
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[25] = "Intel Reserved",
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[26] = "Intel Reserved",
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[27] = "Intel Reserved",
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[28] = "Intel Reserved",
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[29] = "Intel Reserved",
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[30] = "Intel Reserved",
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[31] = "Intel Reserved"
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};
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/* Global variable for save registers on exception */
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struct intr_excp_ctx *crash_ctx;
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static void dump_guest_reg(struct vcpu *vcpu)
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{
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struct run_context *cur_context =
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&vcpu->arch_vcpu.contexts[vcpu->arch_vcpu.cur_context];
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printf("\n\n================================================");
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printf("================================\n\n");
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printf("Guest Registers:\r\n");
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printf("= VM ID %d ==== vCPU ID %hu === pCPU ID %d ===="
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"world %d =============\r\n",
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vcpu->vm->attr.id, vcpu->vcpu_id, vcpu->pcpu_id,
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vcpu->arch_vcpu.cur_context);
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printf("= RIP=0x%016llx RSP=0x%016llx "
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"RFLAGS=0x%016llx\r\n",
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cur_context->rip,
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cur_context->rsp,
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cur_context->rflags);
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printf("= CR0=0x%016llx CR2=0x%016llx "
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" CR3=0x%016llx\r\n",
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cur_context->cr0,
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cur_context->cr2,
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cur_context->cr3);
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printf("= RAX=0x%016llx RBX=0x%016llx "
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"RCX=0x%016llx\r\n",
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cur_context->guest_cpu_regs.regs.rax,
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cur_context->guest_cpu_regs.regs.rbx,
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cur_context->guest_cpu_regs.regs.rcx);
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printf("= RDX=0x%016llx RDI=0x%016llx "
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"RSI=0x%016llx\r\n",
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cur_context->guest_cpu_regs.regs.rdx,
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cur_context->guest_cpu_regs.regs.rdi,
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cur_context->guest_cpu_regs.regs.rsi);
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printf("= RBP=0x%016llx R8=0x%016llx "
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"R9=0x%016llx\r\n",
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cur_context->guest_cpu_regs.regs.rbp,
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cur_context->guest_cpu_regs.regs.r8,
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cur_context->guest_cpu_regs.regs.r9);
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printf("= R10=0x%016llx R11=0x%016llx "
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"R12=0x%016llx\r\n",
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cur_context->guest_cpu_regs.regs.r10,
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cur_context->guest_cpu_regs.regs.r11,
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cur_context->guest_cpu_regs.regs.r12);
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printf("= R13=0x%016llx R14=0x%016llx "
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"R15=0x%016llx\r\n",
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cur_context->guest_cpu_regs.regs.r13,
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cur_context->guest_cpu_regs.regs.r14,
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cur_context->guest_cpu_regs.regs.r15);
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printf("\r\n");
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}
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static void dump_guest_stack(struct vcpu *vcpu)
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{
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uint32_t i;
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uint64_t tmp[DUMP_STACK_SIZE];
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struct run_context *cur_context =
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&vcpu->arch_vcpu.contexts[vcpu->arch_vcpu.cur_context];
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uint32_t err_code = 0;
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if (copy_from_gva(vcpu, tmp, cur_context->rsp, DUMP_STACK_SIZE,
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&err_code) < 0) {
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printf("\r\nUnabled to Copy Guest Stack:\r\n");
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return;
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}
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printf("\r\nGuest Stack:\r\n");
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printf("Dump stack for vcpu %hu, from gva 0x%016llx\r\n",
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vcpu->vcpu_id, cur_context->rsp);
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for (i = 0U; i < DUMP_STACK_SIZE/32U; i++) {
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printf("guest_rsp(0x%llx): 0x%016llx 0x%016llx "
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"0x%016llx 0x%016llx\r\n",
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(cur_context->rsp+i*32),
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tmp[i*4], tmp[i*4+1],
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tmp[i*4+2], tmp[i*4+3]);
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}
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printf("\r\n");
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}
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static void show_guest_call_trace(struct vcpu *vcpu)
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{
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uint64_t bp;
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uint64_t count = 0UL;
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struct run_context *cur_context =
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&vcpu->arch_vcpu.contexts[vcpu->arch_vcpu.cur_context];
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int err;
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uint32_t err_code;
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bp = cur_context->guest_cpu_regs.regs.rbp;
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printf("Guest Call Trace: **************************************\r\n");
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printf("Maybe the call trace is not accurate, pls check stack!!\r\n");
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/* if enable compiler option(no-omit-frame-pointer) the stack layout
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* should be like this when call a function for x86_64
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*
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* | |
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* rbp+8 | return address |
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* rbp | rbp | push rbp
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* | | mov rsp rbp
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*
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* rsp | |
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*
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* try to print out call trace,here can not check if the rbp is valid
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* if the address is invalid, it will cause hv page fault
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* then halt system */
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while ((count++ < CALL_TRACE_HIERARCHY_MAX) && (bp != 0)) {
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uint64_t parent_bp = 0UL;
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err_code = 0U;
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err = copy_from_gva(vcpu, &parent_bp, bp, sizeof(parent_bp),
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&err_code);
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if (err < 0) {
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printf("\r\nUnabled to get Guest parent BP\r\n");
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return;
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}
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printf("BP_GVA(0x%016llx) RIP=0x%016llx\r\n", bp, parent_bp);
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/* Get previous rbp*/
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bp = parent_bp;
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}
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printf("\r\n");
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}
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static void dump_guest_context(uint16_t pcpu_id)
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{
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struct vcpu *vcpu;
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vcpu = per_cpu(vcpu, pcpu_id);
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if (vcpu != NULL) {
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dump_guest_reg(vcpu);
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dump_guest_stack(vcpu);
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show_guest_call_trace(vcpu);
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}
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}
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static void show_host_call_trace(uint64_t rsp, uint64_t rbp, uint16_t pcpu_id)
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{
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uint32_t i = 0U;
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uint32_t cb_hierarchy = 0U;
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uint64_t *sp = (uint64_t *)rsp;
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printf("\r\nHost Stack: CPU_ID = %hu\r\n", pcpu_id);
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for (i = 0U; i < DUMP_STACK_SIZE/32U; i++) {
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printf("addr(0x%llx) 0x%016llx 0x%016llx 0x%016llx "
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"0x%016llx\r\n", (rsp+i*32U), sp[i*4U], sp[i*4U+1U],
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sp[i*4U+2U], sp[i*4U+3U]);
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}
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printf("\r\n");
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printf("Host Call Trace:\r\n");
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if (rsp >
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(uint64_t)&per_cpu(stack, pcpu_id)[CONFIG_STACK_SIZE - 1]
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|| rsp < (uint64_t)&per_cpu(stack, pcpu_id)[0]) {
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return;
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}
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/* if enable compiler option(no-omit-frame-pointer) the stack layout
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* should be like this when call a function for x86_64
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*
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* | |
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* rbp+8 | return address |
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* rbp | rbp | push rbp
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* | | mov rsp rbp
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*
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* rsp | |
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*
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*
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* if the address is invalid, it will cause hv page fault
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* then halt system */
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while ((rbp <=
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(uint64_t)&per_cpu(stack, pcpu_id)[CONFIG_STACK_SIZE - 1])
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&& (rbp >= (uint64_t)&per_cpu(stack, pcpu_id)[0])
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&& (cb_hierarchy++ < CALL_TRACE_HIERARCHY_MAX)) {
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printf("----> 0x%016llx\r\n",
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*(uint64_t *)(rbp + sizeof(uint64_t)));
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if (*(uint64_t *)(rbp + 2*sizeof(uint64_t))
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== SP_BOTTOM_MAGIC) {
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break;
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}
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rbp = *(uint64_t *)rbp;
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}
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printf("\r\n");
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}
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void __assert(int32_t line, const char *file, const char *txt)
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{
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uint16_t pcpu_id = get_cpu_id();
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uint64_t rsp = cpu_rsp_get();
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uint64_t rbp = cpu_rbp_get();
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printf("Assertion failed in file %s,line %d : %s",
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file, line, txt);
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show_host_call_trace(rsp, rbp, pcpu_id);
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dump_guest_context(pcpu_id);
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do {
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asm volatile ("pause" ::: "memory");
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} while (1);
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}
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void dump_intr_excp_frame(struct intr_excp_ctx *ctx)
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{
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const char *name = "Not defined";
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printf("\n\n================================================");
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printf("================================\n=\n");
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if (ctx->vector < 0x20UL) {
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name = excp_names[ctx->vector];
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printf("= Unhandled exception: %d (%s)\n", ctx->vector, name);
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}
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/* Dump host register*/
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printf("\r\nHost Registers:\r\n");
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printf("= Vector=0x%016llX RIP=0x%016llX\n",
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ctx->vector, ctx->rip);
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printf("= RAX=0x%016llX RBX=0x%016llX RCX=0x%016llX\n",
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ctx->rax, ctx->rbx, ctx->rcx);
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printf("= RDX=0x%016llX RDI=0x%016llX RSI=0x%016llX\n",
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ctx->rdx, ctx->rdi, ctx->rsi);
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printf("= RSP=0x%016llX RBP=0x%016llX RBX=0x%016llX\n",
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ctx->rsp, ctx->rbp, ctx->rbx);
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printf("= R8=0x%016llX R9=0x%016llX R10=0x%016llX\n",
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ctx->r8, ctx->r9, ctx->r10);
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printf("= R11=0x%016llX R12=0x%016llX R13=0x%016llX\n",
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ctx->r11, ctx->r12, ctx->r13);
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printf("= RFLAGS=0x%016llX R14=0x%016llX R15=0x%016llX\n",
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ctx->rflags, ctx->r14, ctx->r15);
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printf("= ERRCODE=0x%016llX CS=0x%016llX SS=0x%016llX\n",
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ctx->error_code, ctx->cs, ctx->ss);
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printf("\r\n");
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printf("=====================================================");
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printf("===========================\n");
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}
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void dump_exception(struct intr_excp_ctx *ctx, uint16_t pcpu_id)
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{
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/* Dump host context */
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dump_intr_excp_frame(ctx);
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/* Show host stack */
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show_host_call_trace(ctx->rsp, ctx->rbp, pcpu_id);
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/* Dump guest context */
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dump_guest_context(pcpu_id);
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/* Save registers*/
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crash_ctx = ctx;
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CACHE_FLUSH_INVALIDATE_ALL();
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}
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