On 14/03/19 16:23, Richard Henderson wrote:
> On 3/14/19 3:46 AM, Paolo Bonzini wrote:
>> On 14/03/19 01:56, Richard Henderson wrote:
>>> Hmm. The gcc for aarch64 names the similar feature -mbranch-protection.
>>> I'm
>>> rather annoyed that the i386 gcc folk appropriated a generic -f name witho
On 3/14/19 3:46 AM, Paolo Bonzini wrote:
> On 14/03/19 01:56, Richard Henderson wrote:
>> Hmm. The gcc for aarch64 names the similar feature -mbranch-protection. I'm
>> rather annoyed that the i386 gcc folk appropriated a generic -f name without
>> actually making the feature generic at the same
On 14/03/19 01:56, Richard Henderson wrote:
> Hmm. The gcc for aarch64 names the similar feature -mbranch-protection. I'm
> rather annoyed that the i386 gcc folk appropriated a generic -f name without
> actually making the feature generic at the same time.
Wouldn't -fcf-protection=branch also ap
On 3/13/19 5:40 AM, Paolo Bonzini wrote:
> +##
> +# detect CET support in the toolchain
> +
> +if test "$cet" != no; then
> + write_c_skeleton;
> + if ! compile_prog "-fcf-protection" "" ; then
> +if test "$cet" = yes; then
> + feature_not_found "c
* Paolo Bonzini:
> Actually I might change it to cf-protection, since that's what the GCC
> flag is named.
The GCC flag is supposed to generic, so that it can be used for similar
features other architectures might provide. Your code looks rather
x86-centric to me, so CET seems appropriate here.
On 13/03/19 14:31, Florian Weimer wrote:
> * Paolo Bonzini:
>
>> Actually I might change it to cf-protection, since that's what the GCC
>> flag is named.
>
> The GCC flag is supposed to generic, so that it can be used for similar
> features other architectures might provide. Your code looks rath
On 13/03/19 13:59, Eric Blake wrote:
> On 3/13/19 7:40 AM, Paolo Bonzini wrote:
>> CET requires object files to note which features are supported. The linker
>
> CET = ?
>
>> will merge them to the set of features that are supported by all object
>> files. The compiler creates these notes when
On 3/13/19 7:40 AM, Paolo Bonzini wrote:
> CET requires object files to note which features are supported. The linker
CET = ?
> will merge them to the set of features that are supported by all object
> files. The compiler creates these notes when the -fcf-protection option
> is passed, but we h
CET requires object files to note which features are supported. The linker
will merge them to the set of features that are supported by all object
files. The compiler creates these notes when the -fcf-protection option
is passed, but we have to blacklist some object files that only support
a subs
