On Saturday 19 January 2013 08:53 AM, Al Viro wrote:
> On Fri, Jan 18, 2013 at 05:54:33PM +0530, Vineet Gupta wrote:
>> +SYSCALL_DEFINE0(rt_sigreturn)
>> +{
>> + struct rt_sigframe __user *sf;
>> + unsigned int magic;
>> + int err;
>> + struct pt_regs *regs = task_pt_regs(current);
> ITYM current_pt_regs()...
Done.
>
>> + if (unlikely(is_do_ss_needed(magic)))
>> + if (do_sigaltstack(&sf->uc.uc_stack, NULL, regs->sp) == -EFAULT)
> if (!restore_altstack(&sf->uc.uc_stack))
> please...
>
>> + stk.ss_sp = (void __user *)current->sas_ss_sp;
>> + stk.ss_flags = sas_ss_flags(regs->sp);
>> + stk.ss_size = current->sas_ss_size;
>> + err |= __copy_to_user(&sf->uc.uc_stack, &stk, sizeof(stk));
> that would be
> err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
>
Actually altstack consolidation tracking changes are already present in patch
41/76 - which has other 3.8 specific bits too. This is more of a reflection of my
3.7 baseline and a subsequent migration to 3.8. But you are right, it is creating
undue confusion - I'll chop-n-dice-n-squash those bits into appropriate patches.
Thx,
-Vineet
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