/**
 * @file proc.c
 * Process handling, might be merged into \ref common/tcb.c.
 */

#include <apos/elf.h>
#include <apos/proc.h>
#include <apos/conf.h>
#include <apos/string.h>
#include <apos/initrd.h>
#include <arch/arch.h>
#include <arch/proc.h>

stat_t prepare_proc(struct tcb *t, vm_t bin, vm_t interp)
{
	vm_t entry = load_elf(t, bin, interp);
	if (!entry)
		return ERR_INVAL;

	alloc_stacks(t);
	set_thread(t, t->thread_stack_top);
	set_return(entry);
	return OK;
}

stat_t init_proc(void *fdt)
{
	init_tcbs();

	/** \todo cleanup or something */
	struct tcb *t = create_proc(NULL);
	if (!t)
		return ERR_OOMEM;

	/* set current tcb */
	use_tcb(t);
	use_vmem(t->proc.vmem);

	/* allocate stacks after ELF file to make sure nothing of importance
	 * clashes */
	return prepare_proc(t, get_init_base(fdt), 0);
}