[Bug libc/18661] Some x86-64 assembly codes don't align stack to 16 bytes

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18661

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=72354ab5e1d61dec7606a8851f0eb1bb016f7af7

commit 72354ab5e1d61dec7606a8851f0eb1bb016f7af7
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Jul 12 14:41:20 2015 -0700

    Align stack to 16 bytes when calling __errno_location

    We should align stack to 16 bytes when calling __errno_location.

        [BZ #18661]
        * sysdeps/x86_64/fpu/s_cosf.S (__cosf): Align stack to 16 bytes
        when calling __errno_location.
        * sysdeps/x86_64/fpu/s_sincosf.S (__sincosf): Likewise.
        * sysdeps/x86_64/fpu/s_sinf.S (__sinf): Likewise.

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b4425b95ad64e5945ea9674f888561d725747128

commit b4425b95ad64e5945ea9674f888561d725747128
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Jul 12 14:40:25 2015 -0700

    Align stack to 16 bytes when calling __gettimeofday

    Subtract stack by 24 bytes instead of 16 bytes so that stack is aligned
    to 16 bytes when calling __gettimeofday.

        [BZ #18661]
        * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
        (__lll_timedwait_tid): Align stack to 16 bytes when calling
        __gettimeofday.

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8e1f346462d8c1b238a7c6bb501c45b381a45e4d

commit 8e1f346462d8c1b238a7c6bb501c45b381a45e4d
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Jul 12 14:38:58 2015 -0700

    Align stack to 16 bytes when calling __setcontext

    Don't use pop to restore %rdi so that stack is aligned to 16 bytes
    when calling __setcontext.

        [BZ #18661]
        * sysdeps/unix/sysv/linux/x86_64/__start_context.S
        (__start_context): Don't use pop to restore %rdi so that stack
        is aligned to 16 bytes when calling __setcontext.

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

Summary of changes:
 ChangeLog                                        |   22 ++++++++++++++++++++++
 NEWS                                             |    2 +-
 sysdeps/unix/sysv/linux/x86_64/__start_context.S |    4 ++--
 sysdeps/unix/sysv/linux/x86_64/lowlevellock.S    |    9 +++++----
 sysdeps/x86_64/fpu/s_cosf.S                      |    6 ++++++
 sysdeps/x86_64/fpu/s_sincosf.S                   |    6 ++++++
 sysdeps/x86_64/fpu/s_sinf.S                      |    6 ++++++
 7 files changed, 48 insertions(+), 7 deletions(-)

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