Peter Zijlstra wrote:
On Tue, May 24, 2022 at 04:01:48PM +0530, Naveen N. Rao wrote:
We need to know for sure either way. Nop'ing out the _mcount locations at
boot allows us to discover existing long branch trampolines. If we want to
avoid it, we need to note down those locations during build
On Tue, May 24, 2022 at 04:01:48PM +0530, Naveen N. Rao wrote:
> We need to know for sure either way. Nop'ing out the _mcount locations at
> boot allows us to discover existing long branch trampolines. If we want to
> avoid it, we need to note down those locations during build time.
>
> Do you
Christophe Leroy wrote:
Le 24/05/2022 à 12:15, Naveen N. Rao a écrit :
Christophe Leroy wrote:
Le 23/05/2022 à 19:55, Sathvika Vasireddy a écrit :
Architectures can select HAVE_NOP_MCOUNT if they choose
to nop out mcount call sites. If that config option is
selected, then --mnop is passed
Le 24/05/2022 à 12:15, Naveen N. Rao a écrit :
> Christophe Leroy wrote:
>>
>>
>> Le 23/05/2022 à 19:55, Sathvika Vasireddy a écrit :
>>> Architectures can select HAVE_NOP_MCOUNT if they choose
>>> to nop out mcount call sites. If that config option is
>>> selected, then --mnop is passed as an
Christophe Leroy wrote:
Le 23/05/2022 à 19:55, Sathvika Vasireddy a écrit :
Architectures can select HAVE_NOP_MCOUNT if they choose
to nop out mcount call sites. If that config option is
selected, then --mnop is passed as an option to objtool,
along with --mcount.
Is there a reason not to
Le 23/05/2022 à 19:55, Sathvika Vasireddy a écrit :
> Architectures can select HAVE_NOP_MCOUNT if they choose
> to nop out mcount call sites. If that config option is
> selected, then --mnop is passed as an option to objtool,
> along with --mcount.
>
Is there a reason not to nop out mcount
Architectures can select HAVE_NOP_MCOUNT if they choose
to nop out mcount call sites. If that config option is
selected, then --mnop is passed as an option to objtool,
along with --mcount.
Also, make sure that --mnop can be passed as an option
to objtool only when --mcount is passed.
