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commit e56301bd2528ed83bc695b4acb7c323521d2c6c3
Author: Paulo Duarte <[email protected]>
Date: Sun May 24 02:43:18 2026 +0100
tests: add aarch64 arm to start.S
The userland test stubs run as freestanding multiboot modules: the
kernel exec path hands them control at _start with argc/argv/envp
laid out sysv-style on the stack, and they call c_start(sp) to find
their arguments. The i386 and x86_64 arms already implement this;
add the aarch64 equivalent (mov x0, sp; bl c_start) so test modules
can be cross-compiled with aarch64-unknown-none-elf-gcc and entered
by Bugaev's pcb/exec path.
bl rather than a tail-call b keeps the saved-LR contract intact in
case anything unwinds out of the userland prelude.
Message-ID: <[email protected]>
commit 31e2a0c8ed4565d52548e9851010cf637e23ef14
Author: Paulo Duarte <[email protected]>
Date: Sun May 24 02:43:10 2026 +0100
ipc: declare copyinmsg / copyoutmsg in <ipc/copy_user.h>
The copyinmsg() and copyoutmsg() routines are defined per-arch (in
i386/i386/locore.S and friends) but have never had cross-arch
declarations. Each kern/ caller has historically picked them up
through an arch-specific header, or via implicit declaration.
Declare them in <ipc/copy_user.h> alongside the other copy_user
helpers, with copyoutmsg becoming an alias for copyout when not
building a 64-bit kernel with a 32-bit userland (the only case
where the two diverge today). Add the missing include to
kern/exception.c which uses both.
Message-ID: <[email protected]>
commit e0a8a6fd98af55a73410bf244efc2bb68b04ec63
Author: Paulo Duarte <[email protected]>
Date: Sun May 24 02:43:09 2026 +0100
mach: add EM_AARCH64 to the ELF machine constant list
The Mach exec/elf.h pseudo-header already enumerates a handful of
machine types (PARISC, PPC, x86_64, â¦) but not aarch64. Add it so
exec-format code can recognise aarch64 ELF binaries by EM number.
Defined per the ARM-supplied ELF supplement (the same value Linux,
glibc, and FreeBSD have used since 2014).
Message-ID: <[email protected]>
commit 6c37f565815f0e2d7a1261c3fb02b5476e057de7
Author: Paulo Duarte <[email protected]>
Date: Sun May 24 02:43:06 2026 +0100
aarch64: add per-arch lock.h shim for kern/lock.h's machine include
kern/lock.h on current master unconditionally does
#include <machine/lock.h>
at line 61 (with a /*XXX*/ marker), even though the body only
references its definitions when NCPUS > 1. Bugaev's wip-aarch64
worked around this by editing kern/lock.h itself â wrapping the
include in `#if NCPUS > 1` â which would touch a shared file
upstream maintains.
Provide the include as a per-arch shim instead: an empty
aarch64/aarch64/lock.h. machine/ resolves to the active TARGET's
arch directory at build time, so kern/lock.h's include picks this
up on aarch64 without any shared-file change. Today aarch64 is
built with NCPUS = 1, so an empty header is sufficient; a future
SMP-capable aarch64 port should fill this in with the low-level
_simple_lock_data_t and _simple_lock / _simple_unlock primitives,
mirroring i386/i386/lock.h.
Without this shim the imported port fails to compile the first
file that pulls in kern/lock.h.
Message-ID: <[email protected]>
-----------------------------------------------------------------------
Summary of changes:
.../mach/aarch64/vm_param.h => aarch64/lock.h} | 25 +++++++++++-----------
include/mach/exec/elf.h | 1 +
ipc/copy_user.h | 15 +++++++++++++
kern/exception.c | 1 +
tests/start.S | 10 +++++++++
5 files changed, 39 insertions(+), 13 deletions(-)
copy aarch64/{include/mach/aarch64/vm_param.h => aarch64/lock.h} (57%)
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