On Wed, Dec 18, 2024 at 12:51:23PM +0100, Mickaël Salaün wrote:
> It's useful to build samples/* with UML and the only blocker is the
> artificial incompatibility with CONFIG_HEADERS_INSTALL.
>
> Allow the headers_install target with ARCH=um, which then allow building
> samples (and tests using th
On Tue, 7 Jan 2025 13:07:58 -0800 SeongJae Park wrote:
> Hello,
>
> On Wed, 4 Dec 2024 08:48:27 +0100 Benjamin Berg
> wrote:
>
> > From: Benjamin Berg
> >
> > It was reported that qemu may not enable the XSTATE CPU extension, which
> > is a requirement after commit 3f17fed21491 ("um: switc
From: Johannes Berg
Mark read-only data actually read-only (simple mprotect), and
to be able to test it also implement _nofault accesses. This
works by setting up a new "segv_continue" pointer in current,
and then when we hit a segfault we change the signal return
context so that we continue at t
From: Benjamin Berg
Hi,
using mincore() to check whether a page is owned by UML is not correct
as it returns whether the page is resident in memory and not whether
something has been mapped at the address. This means that UML could get
spurious failures in *_nofault functions like copy_from_kern
From: Benjamin Berg
There is no need to override the default version of this function
anymore as UML now has proper _nofault memory access functions.
Doing this also fixes the fact that the implementation was incorrect as
using mincore() will incorrectly flag pages as inaccessible if they were
s
Similar to syscall_set_arguments() that complements
syscall_get_arguments(), introduce syscall_set_nr()
that complements syscall_get_nr().
syscall_set_nr() is going to be needed along with
syscall_set_arguments() on all HAVE_ARCH_TRACEHOOK
architectures to implement PTRACE_SET_SYSCALL_INFO API.
S
This function is going to be needed on all HAVE_ARCH_TRACEHOOK
architectures to implement PTRACE_SET_SYSCALL_INFO API.
This partially reverts commit 7962c2eddbfe ("arch: remove unused
function syscall_set_arguments()") by reusing some of old
syscall_set_arguments() implementations.
Signed-off-by:
PTRACE_SET_SYSCALL_INFO is a generic ptrace API that complements
PTRACE_GET_SYSCALL_INFO by letting the ptracer modify details of
system calls the tracee is blocked in.
This API allows ptracers to obtain and modify system call details in a
straightforward and architecture-agnostic way, providing a
On Sat, 8 Feb 2025 at 21:32, Thomas Weißschuh wrote:
>
> Usermode Linux uses "um" as primary architecture name and the underlying
> physical architecture is provided in "SUBARCH".
> Resolve the target architecture flags through that underlying architecture.
> This is the same pattern as used by sc
In order to work around some issues with disabling SSE on older versions
of gcc (compilation would fail upon seeing a function declaration
containing a float, even if it was never called or defined), the
corresponding CFLAGS and RUSTFLAGS were only set when using clang.
However, this led to two pr
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