arch/x86_64/lib/object.c


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#include "object.h"
#include "error.h"
#include "device/processor.h"
#include "arch/x86_64/page.h"
#include "arch/x86_64/page-mapping.h"

void*
ko_entry_data(objdir_entry_t *entry)
{
    if((intmax_t)entry->data < 0) return (void*)entry->data;
    return pptr_tovirt_ident(entry->data);
}

uintptr_t
ko_data_toentry(uintptr_t vptr)
{
    return vptr_tophys((void*)vptr);
}

int
ko_message_unmap(objdir_entry_t *message, uintptr_t *saveptr)
{
    /* message data should point to the virtual address. */
    /* If it doesn't, fail*/
    if(!(message->extra & KODE_EX_MESSAGE_MAPPED)) return KE_BADCALL;
    uintptr_t vptr = message->data;

    processor_t *cproc = processor_current();
    pmle_t *pml4 = pptr_tovirt_ident(cproc->pdir);

    pmle_t *message_pmle = pml4_get_mapping(pml4, 4, vptr);
    *saveptr = (uintptr_t)pptr_tovirt_ident(message_pmle->paddr << 12);

    message_pmle->p = 0;
    __asm__ volatile("invlpg (%0)":: "r"(vptr): "memory");

    message->extra &= ~KODE_EX_MESSAGE_MAPPED;
    return 0;
}

int
ko_message_remap(objdir_entry_t *message)
{
    if(message->extra & KODE_EX_MESSAGE_MAPPED) return KE_BADCALL;
    uintptr_t vptr = message->data;
    
    processor_t *cproc = processor_current();
    pmle_t *pml4 = pptr_tovirt_ident(cproc->pdir);

    pmle_t *message_pmle = pml4_get_mapping(pml4, 4, vptr);

    message_pmle->p = 1;
    __asm__ volatile("invlpg (%0)":: "r"(vptr): "memory");

    message->extra |= KODE_EX_MESSAGE_MAPPED;
    return 0;
}

void ko_message_move(objdir_entry_t *message, uintptr_t vptr);