* Emanuele Rocca: > Hello! > > On 2023-11-24 01:34, Guillem Jover wrote: >> According to https://bugs.debian.org/918914#73 there were no pending >> toolchain issues related to this. > > That is correct. The GCC maintainers at Arm confirm that > stack-clash-protection is supported on 32 bit too.
Jeff Law, the original designer of -fstack-clash-protection, disagrees: | So to reiterate, this is precisely the kind of problem we avoid by | having stack-clash specific prologues on the Red Hat Enterprise | Linux architectures. We didn't do a 32bit ARM implementation and | instead rely on the limited protections provided by the Ada | -fstack-check bits. <https://bugzilla.redhat.com/show_bug.cgi?id=1522678#c1> And as far as I can see the code has not changed since then. It's a bit unfortunate that GCC accepts the -fstack-clash-protection flag even if target support is not really there. Note that RISC-V has the same problem, but at least Jeff has mid-term plans to fix that.
