The following reply was made to PR misc/177624; it has been noted by GNATS.
From: Brian Demsky
To: Bruce Evans
Cc: freebsd-bugs@freebsd.org, freebsd-gnats-sub...@freebsd.org
Subject: Re: misc/177624: Swapcontext can get compiled incorrectly
Date: Thu, 4 Apr 2013 09:43:06 -0700
On Apr 4, 2013
On Apr 4, 2013, at 8:16 AM, Bruce Evans wrote:
> On Fri, 5 Apr 2013, Bruce Evans wrote:
>
>> On Thu, 4 Apr 2013, Brian Demsky wrote:
>>
>>>> Description:
>>> Here is the code for swap context:
>>> int
>>> swapcontext(ucontext_t *oucp,
> The analysis is a little wrong about the problem. Ultimately, the tail call
> to set context trashes the copies of bx and r14 on the stack….
On Apr 3, 2013, at 10:03 PM, Eitan Adler wrote:
> On 3 April 2013 23:10, Brian Demsky wrote:
>> The following reply was made to PR misc
The following reply was made to PR misc/177624; it has been noted by GNATS.
From: Brian Demsky
To: bug-follo...@freebsd.org
Cc:
Subject: Re: misc/177624: Swapcontext can get compiled incorrectly
Date: Wed, 03 Apr 2013 20:01:14 -0700
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Apr 04 02:40:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Brian Demsky
>Release:OS X distribution of libc
>Organization:
UCI
>Environment:
>Description:
Here is the code for swap context:
int
swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
{
int ret;
if ((oucp == NULL) || (ucp == NULL)) {
errno = EINVAL;
return (-1);
}
oucp->uc_flags &= ~UCF_SWAPPED;
ret = getcontext(ouc
