arch/x86_64/hal/process.c


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#include "process.h"
#include "arch/x86_64/hal/obj.h"
#include "hal/obj.h"
#include "init.h"
#include "smp.h"
#include "paging.h"
#include "jove.h"

PAGEALIGN char s_init_pcb_bytes[0x1000] = { 0 };
static pcb_t *s_init_pcb = (pcb_t*)&s_init_pcb_bytes;

void
processing_setup(void (*process_main))
{
    uintptr_t ksp = (uintptr_t)&s_init_pcb_bytes + 8;
    s_init_pcb->ksp = (void*)ksp;
    s_init_pcb->pml4 = paging_get_pml4();

    processor_t *proc = processor_current();
    proc->pcb = s_init_pcb;
    proc->tss.rsp[0] = (uintptr_t)s_init_pcb->ksp;

    {
        jove_owned_obj_t *process_obj = obj_take(objdir_getlocal(_rootdir_obj, ROOTDIR_PCB_I));
        obj_settype(process_obj, JOVE_OBJ_PROCESS);
        obj_setvalue(process_obj, (uintptr_t)s_init_pcb);
        obj_release(process_obj);
    }

    __asm__ volatile("\
            movq %0, %%rsp; \
            movq $0, %%rbp; \
            jmpq %1"::
            "r"(s_init_pcb->ksp), "r"(process_main));
}