diff options
| author | Dale Rahn <drahn@cvs.openbsd.org> | 2003-05-04 04:58:17 +0000 |
|---|---|---|
| committer | Dale Rahn <drahn@cvs.openbsd.org> | 2003-05-04 04:58:17 +0000 |
| commit | 0586c027875790df6679f4197c9aab5d5f4d97f4 (patch) | |
| tree | d5b53ec42106c7273f676906166ad5f0a6f8be92 | |
| parent | ff2e1662aa70c8fcde0dec71bf0d8413480603e6 (diff) | |
When a protection fault occurs, force %cr2 to contain the pc as
the fault address.
| -rw-r--r-- | sys/arch/i386/i386/trap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/arch/i386/i386/trap.c b/sys/arch/i386/i386/trap.c index 68c6f74eac5..c7841cb16df 100644 --- a/sys/arch/i386/i386/trap.c +++ b/sys/arch/i386/i386/trap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: trap.c,v 1.54 2003/05/02 21:07:48 mickey Exp $ */ +/* $OpenBSD: trap.c,v 1.55 2003/05/04 04:58:16 drahn Exp $ */ /* $NetBSD: trap.c,v 1.95 1996/05/05 06:50:02 mycroft Exp $ */ /*- @@ -327,6 +327,8 @@ trap(frame) #endif if (ftype == VM_PROT_READ) ftype |= VM_PROT_EXECUTE; + /* force %cr2 register have fault address */ + __asm __volatile("movl %0,%%cr2" :: "r" (frame.tf_eip)); goto page_fault; case T_TSSFLT|T_USER: |