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

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 4fd5e9c2c18fa71ebc6dce5fcfe077f8c9f29bab
Author: Flavio Cruz <flaviocruz@gmail.com>
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: <ZCpOb6vNEfPclKPr@jupiter.tail36e24.ts.net>

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

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


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