[SCM] GNU Mach branch, master, updated. v1.8-780-gb63dea5c

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit b63dea5ca946c3956637a7bf85a1002866b20cd6
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 17:35:01 2023 +0200

    copyinmsg: Check that we have not overflown
    
    This if of course too late in case of a failure, but better assert than get
    awful bugs, and it's really not supposed to happen.

commit 126c0364bf7d72d4f2ecf1ad2f4ebe1d2667940d
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 17:24:02 2023 +0200

    ipc: Fix allocating kernel buffer for storing user message
    
    Otherwise ipc_kmsg_copyin_body will overflow.

commit 513125f30a05b4ad3408d5f4efd36d2c6ba10744
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 16:08:43 2023 +0200

    mach_msg: Fix checking reception size
    
    We need to check against the actual user size that will be used, not the
    current kernel size.
    
    Usually userland uses amply-large reception buffer, but better be exact.

commit e64697e4abda6c7ef512f4a2948c0d777d668be9
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 15:39:49 2023 +0200

    Add and use ikm_cache_alloc/free/_try

commit 922e514ad93bf21985659ad10a96019a20ad4c10
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 14:38:04 2023 +0200

    ddb: Make whatis print copy/pastable text

commit e410a1f71c16229d6b6cbbd18fef7032b8f0a0dc
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Oct 1 14:36:11 2023 +0200

    slab: Make whatis look further
    
    Without a tree, we can still look up by hand in the buffers. This
    also allows to find freed objects.

-----------------------------------------------------------------------

Summary of changes:
 ddb/db_examine.c   | 17 +++++++++--------
 i386/i386/locore.S |  1 +
 i386/i386/locore.h |  2 +-
 ipc/ipc_kmsg.c     | 28 +++++++++------------------
 ipc/ipc_kmsg.h     | 50 ++++++++++++++++++++++++++++++++++++++++++++++++
 ipc/mach_msg.c     | 19 +++++++++---------
 kern/exception.c   | 30 ++++++++++++-----------------
 kern/ipc_kobject.c |  6 +-----
 kern/ipc_mig.c     |  2 +-
 kern/slab.c        | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++---
 x86_64/copy_user.c |  3 ++-
 11 files changed, 149 insertions(+), 65 deletions(-)


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