On 2/3/2021 2:11 PM, Dave Hansen wrote:
On 2/3/21 1:54 PM, Yu, Yu-cheng wrote:
On 1/29/2021 10:56 AM, Yu, Yu-cheng wrote:
On 1/29/2021 9:07 AM, Dave Hansen wrote:
On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
+ if (!IS_ENABLED(CONFIG_X86_CET))
+ return -EOPNOTSUPP;
Let's ignore glibc for
On 2/3/21 1:54 PM, Yu, Yu-cheng wrote:
> On 1/29/2021 10:56 AM, Yu, Yu-cheng wrote:
>> On 1/29/2021 9:07 AM, Dave Hansen wrote:
>>> On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
+ if (!IS_ENABLED(CONFIG_X86_CET))
+ return -EOPNOTSUPP;
>>>
>>> Let's ignore glibc for a moment. What erro
On 1/29/2021 10:56 AM, Yu, Yu-cheng wrote:
On 1/29/2021 9:07 AM, Dave Hansen wrote:
On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
arch_prctl(ARCH_X86_CET_STATUS, u64 *args)
Get CET feature status.
The parameter 'args' is a pointer to a user buffer. The kernel
returns
the following i
On 1/29/2021 11:15 AM, Dave Hansen wrote:
On 1/29/21 10:56 AM, Yu, Yu-cheng wrote:
On 1/29/2021 9:07 AM, Dave Hansen wrote:
On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
[...]
What's the point of doing copy_status_to_user() if the processor doesn't
support CET? In other words, shouldn't this be bel
On 1/29/21 10:56 AM, Yu, Yu-cheng wrote:
> On 1/29/2021 9:07 AM, Dave Hansen wrote:
>> On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
>>> + u64 buf[3] = {0, 0, 0};
Doesn't the compiler zero these if you initialize it to anything? In
other words, doesn't this work?
u64 buf[3] = {};
>>> + i
On 1/29/2021 9:07 AM, Dave Hansen wrote:
On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
arch_prctl(ARCH_X86_CET_STATUS, u64 *args)
Get CET feature status.
The parameter 'args' is a pointer to a user buffer. The kernel returns
the following information:
*args = shadow stack/IBT sta
On 1/27/21 1:25 PM, Yu-cheng Yu wrote:
> arch_prctl(ARCH_X86_CET_STATUS, u64 *args)
> Get CET feature status.
>
> The parameter 'args' is a pointer to a user buffer. The kernel returns
> the following information:
>
> *args = shadow stack/IBT status
> *(args + 1) = shadow sta
arch_prctl(ARCH_X86_CET_STATUS, u64 *args)
Get CET feature status.
The parameter 'args' is a pointer to a user buffer. The kernel returns
the following information:
*args = shadow stack/IBT status
*(args + 1) = shadow stack base address
*(args + 2) = shadow stack size
ar
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