The two-step pattern (open full path as scheme root, then open reference
relative to root_fd) failed for namespace-internal paths like
/scheme/namespace/scheme-creation-cap. The namespace scheme resolves the
full path and returns OtherScheme pointing to SchemeList (a kernel scheme
that does not implement kopenat). The second call then hits
SchemeList.kopenat() → EOPNOTSUPP.
The namespace scheme already handles reference resolution internally via
open_scheme_resource(), so a single SYS_OPENAT call with the full path
resolves everything. This also bypasses FILETABLE.insert_upper (which
previously collided with the untracked ns_fd at UPPER index 0).
The open() function used openat_into_upper which calls
FILETABLE.insert_upper() to allocate UPPER fd slots. This can collide
with the namespace fd (ns_fd) that is stored in DYNAMIC_PROC_INFO,
causing the kernel to overwrite the namespace fd entry. All subsequent
open() calls then resolve to the wrong scheme.
Fix: use raw SYS_OPENAT syscalls (which auto-assign POSIX fds) and
register them with register_external_fd, bypassing insert_upper entirely.
The previous pipe2 implementation used redox_rt::sys::open() which goes
through the FILETABLE's insert_upper mechanism. This can collide with
the untracked namespace fd (ns_fd) stored in DYNAMIC_PROC_INFO, causing
the kernel to overwrite the namespace fd entry with a pipe scheme root
entry. Subsequent open() calls then resolve to the wrong scheme, and
kdup fails with EBADF because it receives a write-end (odd) ID instead
of a read-end (even) ID.
Fix: bypass the open() function entirely and use raw syscall::openat +
syscall::dup, then register both fds with register_external_fd so the
FILETABLE tracks them correctly.
bits/eventfd.h defines the eventfd_t 64-bit counter type used by
sys/eventfd.h. Without this config, cbindgen skipped the directory
and the type wasn't generated.
sys_timerfd was fully implemented in Rust (timerfd_create,
timerfd_settime, timerfd_gettime, itimerspec support) but lacked
the cbindgen.toml needed to generate the <sys/timerfd.h> C header.
Qt6's QSocketNotifier and many other C programs depend on this header.
Without it, cbindgen skips the directory entirely.
This adds the cbindgen config + trailer with all function prototypes,
matching the pattern used by sys_signalfd.
validate_kfmap_flags in kernel proc scheme requires exactly one of
MAP_SHARED or MAP_PRIVATE. Without it, shared == private == false,
and the check fails with EINVAL. This was the root cause of the
fexec_impl crash at step 62 (first PT_LOAD segment mapping).
redox-scheme Socket and RawEventQueue create fds via libredox raw
syscalls (SYS_DUP, openat) that bypass the redox-rt userspace
FILETABLE. When FdGuard::dup later reserves a POSIX fd slot via
FILETABLE.add_posix, it can reserve a position occupied by the
untracked socket fd. SYS_DUP_INTO then closes the socket and
replaces it, corrupting the procmgr's fd table.
Add register_external_fd() to redox-rt::sys that marks an
existing kernel fd as occupied in the userspace FILETABLE.
Call it from procmgr::run() for the socket fd and event queue
fd.
Removes all syscall::write(1, b'FK:...') debug trace lines from
fork_impl/fork_inner in redox-rt/src/proc.rs that were polluting
serial output during every fork() call.
Generated signal.h uses uint32_t, int32_t, uint64_t, uintptr_t etc.
without including stdint.h, causing compilation failures in C packages
that include signal.h (diffutils, etc).
Creates sys_eventfd header module providing eventfd(), eventfd_read(),
and eventfd_write(). Uses the kernel event scheme (/scheme/event) on
Redox, returning ENOSYS on Linux. Required for packages like Python
that link against eventfd.
Upstream precedence: upstream provides eventfd, signalfd, timerfd, POSIX
stubs, cbindgen fixes, Rust 2024 edition, fenv, scheduler, and many more
that RB had previously patched. All RB patches for already-upstreamed
functionality have been dropped per the golden rule.
RB additions on top of upstream:
- Version suffix +rb0.3.1
- Path deps for redox_syscall and libredox (local fork policy)
- [patch.crates-io] for local fork resolution
- Author attribution
Red Bear OS
vasilito