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

Handle misalignment in vmcmd_map_readvn and vmcmd_map_zero correctly.

This commit is contained in:
ws 1999-07-07 20:23:45 +00:00
parent 4e398a6ded
commit 974de8f7f8
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/kern/exec_subr.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: exec_subr.c,v 1.16 1999/03/24 05:51:22 mrg Exp $ */
/* $NetBSD: exec_subr.c,v 1.17 1999/07/07 20:23:45 ws Exp $ */
/*
* Copyright (c) 1993, 1994, 1996 Christopher G. Demetriou
@ -206,11 +206,16 @@ vmcmd_map_readvn(p, cmd)
struct exec_vmcmd *cmd;
{
int error;
long diff;
if (cmd->ev_len == 0)
return(KERN_SUCCESS); /* XXXCDC: should it happen? */
cmd->ev_addr = trunc_page(cmd->ev_addr); /* required by uvm_map */
diff = cmd->ev_addr - trunc_page(cmd->ev_addr);
cmd->ev_addr -= diff; /* required by uvm_map */
cmd->ev_offset -= diff;
cmd->ev_len += diff;
error = uvm_map(&p->p_vmspace->vm_map, &cmd->ev_addr,
round_page(cmd->ev_len), NULL, UVM_UNKNOWN_OFFSET,
UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY,
@ -254,11 +259,15 @@ vmcmd_map_zero(p, cmd)
struct exec_vmcmd *cmd;
{
int error;
long diff;
if (cmd->ev_len == 0)
return(KERN_SUCCESS); /* XXXCDC: should it happen? */
cmd->ev_addr = trunc_page(cmd->ev_addr); /* required by uvm_map */
diff = cmd->ev_addr - trunc_page(cmd->ev_addr);
cmd->ev_addr -= diff; /* required by uvm_map */
cmd->ev_len += diff;
error = uvm_map(&p->p_vmspace->vm_map, &cmd->ev_addr,
round_page(cmd->ev_len), NULL, UVM_UNKNOWN_OFFSET,
UVM_MAPFLAG(cmd->ev_prot, UVM_PROT_ALL, UVM_INH_COPY,