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[SCM] GNU Mach branch, master, updated. v1.8-612-g4fd5e9c2

From: Samuel Thibault
Subject: [SCM] GNU Mach branch, master, updated. v1.8-612-g4fd5e9c2
Date: Mon, 3 Apr 2023 20:16:48 -0400 (EDT)

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU Mach".

The branch, master has been updated
       via  4fd5e9c2c18fa71ebc6dce5fcfe077f8c9f29bab (commit)
      from  4096bd9d9cbdbac9b1bfce99a393295f63a88cc5 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit 4fd5e9c2c18fa71ebc6dce5fcfe077f8c9f29bab
Author: Flavio Cruz <>
Date:   Sun Apr 2 23:56:31 2023 -0400

    Align the user stack correctly for 64 bit programs.
    * i386/i386/thread.h: Define USER_STACK_ALIGN which is 16-byte for 64 bit
      programs as recommended by the System V AMD64 guidelines. Also define
      KERNEL_STACK_ALIGN which can differ from user land.
    * i386/i386/pcb.c: Use USER_STACK_ALIGN to align the bootstrap arguments and
      ultimately the stack where the program starts on.
    * kern/bootstrap.c: Do not align arg_len here since it will be aligned
      in set_user_regs.
    Message-Id: <>


Summary of changes:
 i386/i386/pcb.c    | 13 +++++--------
 i386/i386/thread.h | 13 +++++++++++++
 kern/bootstrap.c   |  3 +--
 3 files changed, 19 insertions(+), 10 deletions(-)

GNU Mach

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