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fix a whole slew of off-by-one errors

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This commit is contained in:
cgd 1993-07-15 15:42:17 +00:00
parent 8e1f902bbc
commit fd3c8fa35a
1 changed files with 8 additions and 8 deletions
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16
sys/vm/vm_glue.c
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@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)vm_glue.c 7.8 (Berkeley) 5/15/91
* $Id: vm_glue.c,v 1.7 1993/06/29 13:47:05 mycroft Exp $
* $Id: vm_glue.c,v 1.8 1993/07/15 15:42:17 cgd Exp $
*
*
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
@ -85,7 +85,7 @@ kernacc(addr, len, rw)
vm_prot_t prot = rw == B_READ ? VM_PROT_READ : VM_PROT_WRITE;
saddr = trunc_page(addr);
eaddr = round_page(addr+len-1);
eaddr = round_page(addr+len);
rv = vm_map_check_protection(kernel_map, saddr, eaddr, prot);
/*
* XXX there are still some things (e.g. the buffer cache) that
@ -121,12 +121,12 @@ useracc(addr, len, rw)
* address here too.
*/
if ((vm_offset_t) addr >= VM_MAXUSER_ADDRESS
|| (vm_offset_t) addr + (len-1) >= VM_MAXUSER_ADDRESS
|| (vm_offset_t) addr + (len-1) < (vm_offset_t) addr)
|| (vm_offset_t) addr + len > VM_MAXUSER_ADDRESS
|| (vm_offset_t) addr + len <= (vm_offset_t) addr)
return (FALSE);
rv = vm_map_check_protection(&curproc->p_vmspace->vm_map,
trunc_page(addr), round_page(addr+len-1), prot);
trunc_page(addr), round_page(addr+len), prot);
return(rv == TRUE);
}
@ -143,7 +143,7 @@ chgkprot(addr, len, rw)
vm_prot_t prot = rw == B_READ ? VM_PROT_READ : VM_PROT_WRITE;
vm_map_protect(kernel_map, trunc_page(addr),
round_page(addr+len-1), prot, FALSE);
round_page(addr+len), prot, FALSE);
}
#endif
@ -152,7 +152,7 @@ vslock(addr, len)
u_int len;
{
vm_map_pageable(&curproc->p_vmspace->vm_map, trunc_page(addr),
round_page(addr+len-1), FALSE);
round_page(addr+len), FALSE);
}
vsunlock(addr, len, dirtied)
@ -164,7 +164,7 @@ vsunlock(addr, len, dirtied)
dirtied++;
#endif lint
vm_map_pageable(&curproc->p_vmspace->vm_map, trunc_page(addr),
round_page(addr+len-1), TRUE);
round_page(addr+len), TRUE);
}
/*