* Michael Clark via Gcc:
> On 8/23/24 15:57, Michael Clark wrote:
>> On 8/23/24 15:46, Michael Clark wrote:
>>> one more thing. it doesn't require PT_GNU_STACK or writable stacks
>>> like GCC nested functions. 🙂 so I think it is safer but it does
>>> have safety issues, mostly related to stack ove
On 8/23/24 15:57, Michael Clark wrote:
On 8/23/24 15:46, Michael Clark wrote:
one more thing. it doesn't require PT_GNU_STACK or writable stacks
like GCC nested functions. 🙂 so I think it is safer but it does have
safety issues, mostly related to stack overflows but its going to need
some care
Am Freitag, dem 23.08.2024 um 15:46 +1200 schrieb Michael Clark via Gcc:
> On 8/23/24 15:24, Michael Clark wrote:
> > On 8/15/24 06:24, Michael Clark wrote:
> > > Hi Folks,
> > >
> > like I said this is crazy talk as alloca isn't even in the C standard.
> > but VLAs are, and the current implement
On 8/23/24 15:46, Michael Clark wrote:
one more thing. it doesn't require PT_GNU_STACK or writable stacks like
GCC nested functions. 🙂 so I think it is safer but it does have safety
issues, mostly related to stack overflows but its going to need some
careful analysis with respect to ROP.
brai
On 8/23/24 15:24, Michael Clark wrote:
On 8/15/24 06:24, Michael Clark wrote:
Hi Folks,
like I said this is crazy talk as alloca isn't even in the C standard.
but VLAs are, and the current implementation of VLAs depends on alloca.
one more thing. it doesn't require PT_GNU_STACK or writable s
done at compile time.
here is a reference to crazy talk on the LLVM discourse:
- https://discourse.llvm.org/t/rfc-stack-arenas-using-alloca/80716
like I said this is crazy talk as alloca isn't even in the C standard.
but VLAs are, and the current implementation of VLAs depends on alloca.
Michael.
Hi Folks,
*sending again with Thunderbird because Apple Mail munged the message*.
I wanted to share a seed of an idea I have been ruminating on for a
while, and that is being able to return alloca memory from a function.
I think it’s trivially possible by hacking the epilogue to unlink the
f
