Francis Moreau writes:
> On 9/17/07, Ulrich Drepper <[email protected]> wrote:
> > On 9/17/07, Francis Moreau <[email protected]> wrote:
> > > I think signal trampolines will still need them too. So making
> > > vsyscalls configurable doesn't seem to work, does it ?
> >
> > vsyscalls aren't used for that. We have a restorer in libc and could
> > easily use one in the vdso. That's what is done on x86.
> >
>
> Sorry for my ignorance but what' is 'a restorer' ?
When the kernel sets up the context for a user-space signal
handler, it needs to supply a return address (in a register
or on the stack). That's the restorer. The restorer points
to a stub that performs sys_{rt_,}sigreturn(). Depending on
architecture and kernel version, the restorer stub can be
defined by libc, or be provided automatically by the kernel.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
