RFC [PATCH v2 0/2] <sys/tagged-address.h>: An API for tagged address

[H.J. Lu]

By default, the number of the address bits used in address translation
is the number of address bits.  But it can be changed by ARM Top-byte
Ignore (TBI) or Intel Linear Address Masking (LAM).

<sys/tagged-address.h> provides an API for tagged address manipulation:

H.J. Lu (2):
  <sys/tagged-address.h>: An API for tagged address
  <sys/tagged-address.h>: Update libc.abilist files

 NEWS                                          |  2 +
 bits/tagged-address.h                         | 28 +++++++++
 elf/dl-support.c                              |  5 ++
 include/sys/tagged-address.h                  |  9 +++
 manual/Makefile                               |  3 +-
 manual/ctype.texi                             |  2 +-
 manual/memory.texi                            |  2 +-
 manual/tagged-address.texi                    | 58 +++++++++++++++++++
 misc/Makefile                                 | 19 ++++--
 misc/Versions                                 |  7 +++
 misc/set-tagged-address-mask.c                | 42 ++++++++++++++
 misc/sys/tagged-address.h                     | 56 ++++++++++++++++++
 misc/tagged-address.c                         | 55 ++++++++++++++++++
 misc/tst-tagged-address-1-static.c            |  1 +
 misc/tst-tagged-address-1.c                   | 38 ++++++++++++
 misc/tst-tagged-address-2-static.c            |  1 +
 misc/tst-tagged-address-2.c                   | 44 ++++++++++++++
 misc/tst-tagged-address-3-static.c            |  1 +
 misc/tst-tagged-address-3.c                   | 38 ++++++++++++
 nptl/pthread_create.c                         |  4 ++
 sysdeps/generic/inline-tagged-address.h       | 43 ++++++++++++++
 sysdeps/generic/ldsodefs.h                    |  4 ++
 sysdeps/mach/hurd/i386/libc.abilist           |  5 ++
 sysdeps/unix/sysv/linux/aarch64/libc.abilist  |  5 ++
 sysdeps/unix/sysv/linux/alpha/libc.abilist    |  5 ++
 sysdeps/unix/sysv/linux/arc/libc.abilist      |  5 ++
 sysdeps/unix/sysv/linux/arm/be/libc.abilist   |  5 ++
 sysdeps/unix/sysv/linux/arm/le/libc.abilist   |  5 ++
 sysdeps/unix/sysv/linux/csky/libc.abilist     |  5 ++
 sysdeps/unix/sysv/linux/hppa/libc.abilist     |  5 ++
 sysdeps/unix/sysv/linux/i386/libc.abilist     |  5 ++
 sysdeps/unix/sysv/linux/ia64/libc.abilist     |  5 ++
 .../sysv/linux/m68k/coldfire/libc.abilist     |  5 ++
 .../unix/sysv/linux/m68k/m680x0/libc.abilist  |  5 ++
 .../sysv/linux/microblaze/be/libc.abilist     |  5 ++
 .../sysv/linux/microblaze/le/libc.abilist     |  5 ++
 .../sysv/linux/mips/mips32/fpu/libc.abilist   |  5 ++
 .../sysv/linux/mips/mips32/nofpu/libc.abilist |  5 ++
 .../sysv/linux/mips/mips64/n32/libc.abilist   |  5 ++
 .../sysv/linux/mips/mips64/n64/libc.abilist   |  5 ++
 sysdeps/unix/sysv/linux/nios2/libc.abilist    |  5 ++
 .../linux/powerpc/powerpc32/fpu/libc.abilist  |  5 ++
 .../powerpc/powerpc32/nofpu/libc.abilist      |  5 ++
 .../linux/powerpc/powerpc64/be/libc.abilist   |  5 ++
 .../linux/powerpc/powerpc64/le/libc.abilist   |  5 ++
 .../unix/sysv/linux/riscv/rv32/libc.abilist   |  5 ++
 .../unix/sysv/linux/riscv/rv64/libc.abilist   |  5 ++
 .../unix/sysv/linux/s390/s390-32/libc.abilist |  5 ++
 .../unix/sysv/linux/s390/s390-64/libc.abilist |  5 ++
 sysdeps/unix/sysv/linux/sh/be/libc.abilist    |  5 ++
 sysdeps/unix/sysv/linux/sh/le/libc.abilist    |  5 ++
 .../sysv/linux/sparc/sparc32/libc.abilist     |  5 ++
 .../sysv/linux/sparc/sparc64/libc.abilist     |  5 ++
 .../unix/sysv/linux/x86_64/64/libc.abilist    |  5 ++
 .../unix/sysv/linux/x86_64/x32/libc.abilist   |  5 ++
 55 files changed, 620 insertions(+), 7 deletions(-)
 create mode 100644 bits/tagged-address.h
 create mode 100644 include/sys/tagged-address.h
 create mode 100644 manual/tagged-address.texi
 create mode 100644 misc/set-tagged-address-mask.c
 create mode 100644 misc/sys/tagged-address.h
 create mode 100644 misc/tagged-address.c
 create mode 100644 misc/tst-tagged-address-1-static.c
 create mode 100644 misc/tst-tagged-address-1.c
 create mode 100644 misc/tst-tagged-address-2-static.c
 create mode 100644 misc/tst-tagged-address-2.c
 create mode 100644 misc/tst-tagged-address-3-static.c
 create mode 100644 misc/tst-tagged-address-3.c
 create mode 100644 sysdeps/generic/inline-tagged-address.h

-- 
2.29.2