[Bug libc/21457] sys/ucontext.h namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=21457

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e78dc67889c35d9a77e043930dc234005cdcbc76

commit e78dc67889c35d9a77e043930dc234005cdcbc76
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Jun 29 19:44:43 2017 +0000

    SPARC sys/ucontext.h namespace fixes (bug 21457).

    This patch fixes various miscellaneous namespace issues in the SPARC
    sys/ucontext.h header.  These are similar to changes made previous to
    other sys/ucontext.h headers, where the SPARC header was excluded from
    those previous patches because of its complexity.

    Tested for SPARC with build-many-glibcs.py.

        [BZ #21457]
        * sysdeps/unix/sysv/linux/sparc/sys/ucontext.h (__ctx): New macro.
        [__WORDSIZE == 64] (MC_TSTATE): Define only for [__USE_MISC].
        [__WORDSIZE == 64] (MC_PC): Likewise.
        [__WORDSIZE == 64] (MC_NPC): Likewise.
        [__WORDSIZE == 64] (MC_Y): Likewise.
        [__WORDSIZE == 64] (MC_G1): Likewise.
        [__WORDSIZE == 64] (MC_G2): Likewise.
        [__WORDSIZE == 64] (MC_G3): Likewise.
        [__WORDSIZE == 64] (MC_G4): Likewise.
        [__WORDSIZE == 64] (MC_G5): Likewise.
        [__WORDSIZE == 64] (MC_G6): Likewise.
        [__WORDSIZE == 64] (MC_G7): Likewise.
        [__WORDSIZE == 64] (MC_O0): Likewise.
        [__WORDSIZE == 64] (MC_O1): Likewise.
        [__WORDSIZE == 64] (MC_O2): Likewise.
        [__WORDSIZE == 64] (MC_O3): Likewise.
        [__WORDSIZE == 64] (MC_O4): Likewise.
        [__WORDSIZE == 64] (MC_O5): Likewise.
        [__WORDSIZE == 64] (MC_O6): Likewise.
        [__WORDSIZE == 64] (MC_O7): Likewise.
        [__WORDSIZE == 64] (MC_NGREG): Rename to __MC_NGREG and define to
        __MC_NGREG if [__USE_MISC].
        [__WORDSIZE == 64] (MC_MAXFPQ): Define only for [__USE_MISC].
        [__WORDSIZE == 64] (mc_gregset_t): Define using __MC_NGREG.
        [__WORDSIZE == 64] (struct mc_fq): Rename to struct __mc_fq.
        Define fields using __ctx.
        [__WORDSIZE == 64] (mc_fpu_t): Remove struct tag.  Define fields
        using __ctx.
        [__WORDSIZE == 64] (mcontext_t): Define fields using __ctx.
        (REG_PSR): Define only for [__USE_MISC].
        (REG_PC): Likewise.
        (REG_nPC): Likewise.
        (REG_Y): Likewise.
        (REG_G1): Likewise.
        (REG_G2): Likewise.
        (REG_G3): Likewise.
        (REG_G4): Likewise.
        (REG_G5): Likewise.
        (REG_G6): Likewise.
        (REG_G7): Likewise.
        (REG_O0): Likewise.
        (REG_O1): Likewise.
        (REG_O2): Likewise.
        (REG_O3): Likewise.
        (REG_O4): Likewise.
        (REG_O5): Likewise.
        (REG_O6): Likewise.
        (REG_O7): Likewise.
        [__WORDSIZE == 64] (REG_ASI): Define only for [__USE_MISC].
        [__WORDSIZE == 64] (REG_FPRS): Likewise.
        (NGREG): Rename to __NGREG and define to __NGREG if [__USE_MISC].
        (gregset_t): Define using __NGREG.
        (SPARC_MAXREGWINDOW): Rename to __SPARC_MAXREGWINDOW and define to
        __SPARC_MAXREGWINDOW if [__USE_MISC].
        (struct rwindow): Rename to struct __rwindow.  Define fields using
        __ctx.
        (rw_fp): Define only for [__USE_MISC].
        (rw_rtn): Likewise.
        (gwindows_t): Remove struct tag.  Define fields using __ctx and
        __SPARC_MAXREGWINDOW.
        (MAXFPQ): Define only for [__USE_MISC].
        (struct fpq): Rename to struct __fpq.  Define fields using __ctx.
        (struct fq): Rename to struct __fq.  Define fields using __ctx.
        (FPU_REGS_TYPE): Define only for [__USE_MISC].
        (FPU_DREGS_TYPE): Likewise.
        (V7_FPU_FSR_TYPE): Likewise.
        (V9_FPU_FSR_TYPE): Likewise.
        (V9_FPU_FPRS_TYPE): Likewise.
        [__WORDSIZE == 64] (fpregset_t): Remove struct tag.  Define fields
        using __ctx.
        [__WORDSIZE != 64] (fpregset_t): Likewise.
        [__WORDSIZE != 64] (xrs_t): Define fields using __ctx.
        [__WORDSIZE != 64] (XRS_ID): Define only for [__USE_MISC].
        [__WORDSIZE != 64] (mcontext_t): Define fields using __ctx.
        Rename field filler to __glibc_reserved1.
        * sysdeps/unix/sysv/linux/sparc/sparc32/ucontext_i.sym
        (MC_FILLER): Remove.

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

Summary of changes:
 ChangeLog                                          |   81 ++++++
 NEWS                                               |    8 +-
 .../unix/sysv/linux/sparc/sparc32/ucontext_i.sym   |    1 -
 sysdeps/unix/sysv/linux/sparc/sys/ucontext.h       |  267 +++++++++++---------
 4 files changed, 236 insertions(+), 121 deletions(-)

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