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Show dump of executed code at KVM exit

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Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Pekka Enberg
2015-06-01 16:39:38 +01:00
committed by Will Deacon
parent d5741c92aa
commit 6f10be05fc
1 changed files with 24 additions and 0 deletions
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kvm.c
+24
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@@ -177,6 +177,29 @@ static inline void *guest_addr_to_host(struct kvm *self, unsigned long offset)
return self->ram_start + offset;
}
static void kvm__show_code(struct kvm *self)
{
unsigned int code_bytes = 64;
unsigned int code_prologue = code_bytes * 43 / 64;
unsigned int code_len = code_bytes;
unsigned char c;
uint8_t *ip;
int i;
ip = guest_addr_to_host(self, self->regs.rip - code_prologue);
printf("Code: ");
for (i = 0; i < code_len; i++, ip++) {
if (ip == guest_addr_to_host(self, self->regs.rip))
printf("<%02x> ", c);
else
printf("%02x ", c);
}
printf("\n");
}
/* bzImages are loaded at 1 MB by default. */
#define KERNEL_START_ADDR (1024ULL * 1024ULL)
@@ -269,6 +292,7 @@ int main(int argc, char *argv[])
kvm->kvm_run->exit_reason, exit_reasons[kvm->kvm_run->exit_reason]);
kvm__show_registers(kvm);
kvm__show_code(kvm);
return 0;
}