Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

import sys_minherit() from openbsd.

This commit is contained in:
chuck 1997-09-08 18:19:45 +00:00
parent 5ef067d288
commit 1821ecc346
1 changed files with 46 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
sys/vm/vm_mmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vm_mmap.c,v 1.50 1997/07/04 20:22:21 drochner Exp $ */
/* $NetBSD: vm_mmap.c,v 1.51 1997/09/08 18:19:45 chuck Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -479,6 +479,51 @@ sys_mprotect(p, v, retval)
return (EINVAL);
}
int
sys_minherit(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct sys_minherit_args /* {
syscallarg(caddr_t) addr;
syscallarg(int) len;
syscallarg(int) inherit;
} */ *uap = v;
vm_offset_t addr;
vm_size_t size, pageoff;
register vm_inherit_t inherit;
addr = (vm_offset_t)SCARG(uap, addr);
size = (vm_size_t)SCARG(uap, len);
inherit = SCARG(uap, inherit);
#ifdef DEBUG
if (mmapdebug & MDB_FOLLOW)
printf("minherit(%d): addr 0x%lx len %lx inherit %d\n", p->p_pid,
addr, size, inherit);
#endif
/*
* Align the address to a page boundary,
* and adjust the size accordingly.
*/
pageoff = (addr & PAGE_MASK);
addr -= pageoff;
size += pageoff;
size = (vm_size_t) round_page(size);
if ((int)size < 0)
return(EINVAL);
switch (vm_map_inherit(&p->p_vmspace->vm_map, addr, addr+size,
inherit)) {
case KERN_SUCCESS:
return (0);
case KERN_PROTECTION_FAILURE:
return (EACCES);
}
return (EINVAL);
}
/* ARGSUSED */
int
sys_madvise(p, v, retval)