Ejemplos de vm_newsect en C++ (Cpp)

Ejemplo n.º 1

struct buf * geteblk_special(size_t size, uint32_t control)
{
    struct proc_info * proc = proc_ref(0);
    const uintptr_t kvaddr = get_ksect_addr(size);
    struct buf * buf;
    int err;

    KASSERT(proc, "Can't get the PCB of pid 0");
    proc_unref(proc);

    if (kvaddr == 0) {
        KERROR_DBG("Returned kvaddr is NULL\n");
        return NULL;
    }

    buf = vm_newsect(kvaddr, size, VM_PROT_READ | VM_PROT_WRITE);
    if (!buf) {
        KERROR_DBG("vm_newsect() failed\n");
        return NULL;
    }

    buf->b_mmu.control = control;

    err = vm_insert_region(proc, buf, VM_INSOP_MAP_REG);
    if (err < 0) {
        panic("Mapping a kernel special buffer failed");
    }

    buf->b_data = buf->b_mmu.vaddr; /* Should be same as kvaddr */

    return buf;
}

Ejemplo n.º 2

Archivo: exec_elf32.c Proyecto: htchiang/zeke

static int load_section(struct buf ** region, file_t * file,
                        uintptr_t rbase, struct elf32_phdr * phdr)
{
    vnode_t * vn = file->vnode;
    int prot;
    struct buf * sect;

    if (phdr->p_memsz < phdr->p_filesz)
        return -ENOEXEC;

    prot = elf32_trans_prot(phdr->p_flags);
    sect = vm_newsect(phdr->p_vaddr + rbase, phdr->p_memsz, prot);
    if (!sect)
        return -ENOMEM;

    if (phdr->p_filesz > 0) {
        int err;
        void * ldp;
        struct uio uio;

        if (vn->vnode_ops->lseek(file, phdr->p_offset, SEEK_SET) < 0)
            return -ENOEXEC;

        ldp = (void *)(sect->b_data + (phdr->p_vaddr - sect->b_mmu.vaddr));
        uio_init_kbuf(&uio, ldp, phdr->p_filesz);
        err = vn->vnode_ops->read(file, &uio, phdr->p_filesz);
        if (err < 0) {
            if (sect->vm_ops->rfree)
                sect->vm_ops->rfree(sect);
            return -ENOEXEC;
        }
    }

    *region = sect;
    return 0;
}