int
sys_minherit(struct proc *p, void *v, register_t *retval)
{
struct sys_minherit_args /* {
syscallarg(void *) addr;
syscallarg(size_t) len;
syscallarg(int) inherit;
} */ *uap = v;
vaddr_t addr;
vsize_t size, pageoff;
vm_inherit_t inherit;
addr = (vaddr_t)SCARG(uap, addr);
size = (vsize_t)SCARG(uap, len);
inherit = SCARG(uap, inherit);
/*
* align the address to a page boundary, and adjust the size accordingly
*/
ALIGN_ADDR(addr, size, pageoff);
if (addr > SIZE_MAX - size)
return (EINVAL); /* disallow wrap-around. */
return (uvm_map_inherit(&p->p_vmspace->vm_map, addr, addr+size,
inherit));
}
int
sys_minherit(struct lwp *l, const struct sys_minherit_args *uap, register_t *retval)
{
/* {
syscallarg(void *) addr;
syscallarg(int) len;
syscallarg(int) inherit;
} */
struct proc *p = l->l_proc;
vaddr_t addr;
vsize_t size, pageoff;
vm_inherit_t inherit;
int error;
addr = (vaddr_t)SCARG(uap, addr);
size = (vsize_t)SCARG(uap, len);
inherit = SCARG(uap, inherit);
/*
* align the address to a page boundary and adjust the size accordingly.
*/
pageoff = (addr & PAGE_MASK);
addr -= pageoff;
size += pageoff;
size = (vsize_t)round_page(size);
error = range_test(addr, size, false);
if (error)
return error;
error = uvm_map_inherit(&p->p_vmspace->vm_map, addr, addr + size,
inherit);
return error;
}