diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 2002-07-24 01:15:40 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 2002-07-24 01:15:40 +0000 |
| commit | befce8bbc6a3f0881efe0d0290480512962bd8c5 (patch) | |
| tree | f1715449337d34d08c587d41745daddd130eb855 /sys | |
| parent | e104fdd5e62b5b3c72cc793a1518a90ea21b6dcf (diff) | |
limit user code up to below the user stack, making stack addresses, effectively, unexecutable. signal trampoline is mapped elesewhere now, 10x to art@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/i386/i386/machdep.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c index 936990935f6..70d909efa81 100644 --- a/sys/arch/i386/i386/machdep.c +++ b/sys/arch/i386/i386/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.212 2002/07/20 19:24:56 art Exp $ */ +/* $OpenBSD: machdep.c,v 1.213 2002/07/24 01:15:39 mickey Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -2105,7 +2105,8 @@ init386(first_avail) setsegment(&gdt[GDATA_SEL].sd, 0, 0xfffff, SDT_MEMRWA, SEL_KPL, 1, 1); setsegment(&gdt[GLDT_SEL].sd, ldt, sizeof(ldt) - 1, SDT_SYSLDT, SEL_KPL, 0, 0); - setsegment(&gdt[GUCODE_SEL].sd, 0, i386_btop(VM_MAXUSER_ADDRESS) - 1, + setsegment(&gdt[GUCODE_SEL].sd, 0, + i386_btop(VM_MAXUSER_ADDRESS - MAXSSIZ) - 1, SDT_MEMERA, SEL_UPL, 1, 1); setsegment(&gdt[GUDATA_SEL].sd, 0, i386_btop(VM_MAXUSER_ADDRESS) - 1, SDT_MEMRWA, SEL_UPL, 1, 1); |