Module Name: src
Committed By: reinoud
Date: Mon Aug 29 12:42:19 UTC 2011
Modified Files:
src/sys/arch/usermode/usermode: trap.c
Log Message:
Hack trap for now to upgrade protection.. this really needs fixing soon
To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/usermode/usermode/trap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/usermode/trap.c
diff -u src/sys/arch/usermode/usermode/trap.c:1.10 src/sys/arch/usermode/usermode/trap.c:1.11
--- src/sys/arch/usermode/usermode/trap.c:1.10 Sun Aug 28 19:38:20 2011
+++ src/sys/arch/usermode/usermode/trap.c Mon Aug 29 12:42:19 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: trap.c,v 1.10 2011/08/28 19:38:20 reinoud Exp $ */
+/* $NetBSD: trap.c,v 1.11 2011/08/29 12:42:19 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.10 2011/08/28 19:38:20 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.11 2011/08/29 12:42:19 reinoud Exp $");
#include <sys/types.h>
#include <sys/param.h>
@@ -35,15 +35,18 @@
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/userret.h>
+#include <sys/errno.h>
+
#include <uvm/uvm_extern.h>
#include <machine/cpu.h>
+#include <machine/pcb.h>
+#include <machine/pmap.h>
+#include <machine/thunk.h>
+
//#include <machine/ctlreg.h>
//#include <machine/trap.h>
//#include <machine/instr.h>
-#include <machine/pcb.h>
-#include <machine/pmap.h>
//#include <machine/userret.h>
-#include <machine/thunk.h>
void setup_signal_handlers(void);
@@ -135,11 +138,17 @@
panic("peeing outside the box!");
}
- pcb->pcb_onfault = NULL;
/* XXX TODO determine atype?? */
-atype = PROT_READ | PROT_WRITE;
+atype = PROT_READ;
+again:
+ pcb->pcb_onfault = NULL;
rv = uvm_fault(vm_map, (vaddr_t) va, atype);
pcb->pcb_onfault = (void *) onfault;
+if (rv) printf("uvm_fault rv = %d\n", rv);
+if (rv == EACCES) {
+ atype |= PROT_WRITE | PROT_EXEC;
+ goto again;
+}
if (rv) {
/* something got wrong */
if (kmem) {
