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dump also the last on values on the stack if the VM crashes

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This commit is contained in:
Stefan Lankes 2017-08-22 21:57:57 +02:00
parent 37df4f3d05
commit 3500995762
1 changed files with 34 additions and 0 deletions
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34
tools/uhyve.c
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@ -517,6 +517,17 @@ static int load_checkpoint(uint8_t* mem, char* path)
return 0;
}
static size_t virt2phys(size_t addr)
{
struct kvm_translation trans;
// determine guest physical address of the current rsp
trans.linear_address = addr;
kvm_ioctl(vcpufd, KVM_TRANSLATE, &trans);
return trans.physical_address;
}
static inline void show_dtable(const char *name, struct kvm_dtable *dtable)
{
fprintf(stderr, " %s %016zx %08hx\n", name, (size_t) dtable->base, (uint16_t) dtable->limit);
@ -589,6 +600,29 @@ static void show_registers(int id, struct kvm_regs* regs, struct kvm_sregs* sreg
for (i = 0; i < (KVM_NR_INTERRUPTS + 63) / 64; i++)
fprintf(stderr, " %016zx", (size_t) sregs->interrupt_bitmap[i]);
fprintf(stderr, "\n");
fprintf(stderr, "\n Last values on the stack:\n");
// determine guest physical address of the current rsp
size_t rsp_phys = virt2phys(regs->rsp);
for (i=7; i>=0; i--)
fprintf(stderr, " [0x%llx] = 0x%zx\n", regs->rsp+i*sizeof(size_t),
*((size_t*)(guest_mem+rsp_phys+i*sizeof(size_t))));
size_t tr_phys = virt2phys(sregs->tr.base);
for(i=0; i<7; i++) {
size_t vaddr = *((size_t*) (guest_mem+tr_phys+9*4+i*sizeof(size_t)));
if (vaddr) {
fprintf(stderr, "\n Last values on IST%d (at 0x%zx):\n", i, vaddr);
size_t paddr = virt2phys(vaddr);
for(int j=0; j<8; j++)
fprintf(stderr, " [0x%zx] = 0x%zx\n", vaddr-j*sizeof(size_t),
*((size_t*) (guest_mem+paddr-j*sizeof(size_t))));
}
}
}
static void print_registers(void)