/*
* Find the absolute bottom of the stack and set stuff up.
* Pretty stupid way, at least find a way to use the system call for this (later)
* @returns 0 if everything went well 0 otherwise
*/
int GC_init(void)
{
static int initted;
extern char __bss_start; // Provided by the linker.
void *tmp;
if (initted)
return;
initted = 1;
stack_bottom = get_stack_bottom();
usedptr = NULL;
freeptr = NULL;
BBSstart = aling_pointer((void*)&__bss_start, sizeof(void));
tmp = sbrk(0);
if(tmp == (void*)-1)
{
fprintf(stderr, "Unable to init BBSend\n");
return 1;
}
BBSend = aling_pointer(tmp, sizeof(void));
return 0;
}
int main(int argc, char * argv[]) {
fprintf(
stderr, "Current stack bottom is %p\n", get_stack_bottom());
while (1)
;
return ( EXIT_SUCCESS);
} /* end of main */
static void vmx_set_host_env(struct vcpu *v)
{
unsigned int cpu = smp_processor_id();
__vmwrite(HOST_IDTR_BASE, (unsigned long)idt_tables[cpu]);
__vmwrite(HOST_TR_SELECTOR, __TSS(cpu) << 3);
__vmwrite(HOST_TR_BASE, (unsigned long)&init_tss[cpu]);
__vmwrite(HOST_SYSENTER_ESP, get_stack_bottom());
/*
* Skip end of cpu_user_regs when entering the hypervisor because the
* CPU does not save context onto the stack. SS,RSP,CS,RIP,RFLAGS,etc
* all get saved into the VMCS instead.
*/
__vmwrite(HOST_RSP,
(unsigned long)&get_cpu_info()->guest_cpu_user_regs.error_code);
}
