diff options
Diffstat (limited to 'xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c')
| -rw-r--r-- | xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c b/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c index a7c0755d38..c1764fce50 100644 --- a/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c +++ b/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c @@ -269,6 +269,9 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp, unlazy_fpu(current); struct_cpy(&p->thread.i387, ¤t->thread.i387); + /* We're careful with hypercall privileges. Don't allow inheritance. */ + p->thread.hypercall_pl = 1; + return 0; } @@ -366,8 +369,9 @@ void __switch_to(struct task_struct *prev_p, struct task_struct *next_p) { queue_multicall2(__HYPERVISOR_stack_switch, __KERNEL_DS, next->esp0); /* Next call will silently fail if we are a non-privileged guest OS. */ - queue_multicall1(__HYPERVISOR_iopl, - ((((struct pt_regs *)next->esp0)-1)->eflags>>12)&3); + queue_multicall2(__HYPERVISOR_set_priv_levels, + ((((struct pt_regs *)next->esp0)-1)->eflags>>12)&3, + next->hypercall_pl); } /* EXECUTE ALL TASK SWITCH XEN SYSCALLS AT THIS POINT. */ |