Il 01/03/23 21:18, Samuel Thibault ha scritto:
Luca Dariz, le mer. 01 mars 2023 18:40:37 +0100, a ecrit:
+asm volatile("wrmsr"
+ :
+ : "c" (regaddr), "a" (low), "d" (high)
+ : "memory" /* wrmsr is a serializing instruction */
The comment cou
And I'll upload the fix to debian, possibly that'll fix some bugs we
have seen in golang packages builds.
Samuel Thibault, le jeu. 02 mars 2023 00:33:09 +0100, a ecrit:
> Applied, thanks!
>
> Sergey Bugaev, le mer. 01 mars 2023 19:23:54 +0300, a ecrit:
> > "We don't need it any more"
> >
> > The
Applied, thanks!
Sergey Bugaev, le mer. 01 mars 2023 19:23:55 +0300, a ecrit:
> Also, fix a couple of typos. No functional change.
>
> Signed-off-by: Sergey Bugaev
> ---
> hurd/hurdsig.c | 101 +
> 1 file changed, 51 insertions(+), 50 deletions(-)
Applied, thanks!
Sergey Bugaev, le mer. 01 mars 2023 19:23:54 +0300, a ecrit:
> "We don't need it any more"
>
> The INTR_MSG_TRAP macro in intr-msg.h used to play little trick with
> the stack pointer: it would temporarily save the "real" stack pointer
> into ecx, while setting esp to point to ju
Luca Dariz, le mer. 01 mars 2023 18:40:37 +0100, a ecrit:
> +asm volatile("wrmsr"
> + :
> + : "c" (regaddr), "a" (low), "d" (high)
> + : "memory" /* wrmsr is a serializing instruction */
The comment could be misleading.
The fact that it's a ser
Luca, le mer. 01 mars 2023 19:01:02 +0100, a ecrit:
> I still have to fully understand the existing code, so this might be
> something completely wrong... but if interrupting an rpc is a complex thing
> to do reliably in user space, why not add some kernel support? Also, how do
> you test this code
Hi,
Il 01/03/23 17:23, Sergey Bugaev ha scritto:
"We don't need it any more"
The INTR_MSG_TRAP macro in intr-msg.h used to play little trick with
the stack pointer: it would temporarily save the "real" stack pointer
into ecx, while setting esp to point to just before the message buffer,
and the
While theoretically we could still use the same call gate as for
32-bit userspace, it doesn't seem very common, and gcc seems to not
encode properly the instruction. Instead we use syscall/sysret as
other kernels (e.g. XNU,Linux). This version still has some
limitations, but should be enough to sta
"We don't need it any more"
The INTR_MSG_TRAP macro in intr-msg.h used to play little trick with
the stack pointer: it would temporarily save the "real" stack pointer
into ecx, while setting esp to point to just before the message buffer,
and then invoke the mach_msg trap. This way, INTR_MSG_TRAP
Also, fix a couple of typos. No functional change.
Signed-off-by: Sergey Bugaev
---
hurd/hurdsig.c | 101 +
1 file changed, 51 insertions(+), 50 deletions(-)
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c
index 5ff0a91f..85bd46b5 100644
--- a/hurd/h
Sergey Bugaev, le mer. 01 mars 2023 12:21:17 +0300, a ecrit:
> * eip < _hurd_intr_rpc_msg_about_to => thread is still to check
> ss->cancel, so just set ss->cancel = 1;
> * _hurd_intr_rpc_msg_about_to <= eip < _hurd_intr_rpc_msg_setup_done
> => thread is still to check eax, so set eax = MACH_SEND_I
On Wed, Mar 1, 2023 at 12:09 AM Samuel Thibault wrote:
>
> Sergey Bugaev, le mar. 28 févr. 2023 18:53:05 +0300, a ecrit:
> > Really, why would it matter whether eip is after
> > _hurd_intr_rpc_msg_about_to or not? What if it's 1 instruction before
> > that? We skip the call, pretending it was inte
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