[v5,00/13] Glibc OpenRISC port

  This is the OpenRISC port for glibc that I have been working on.

Changes since v4:
 - Fix suggestion from Joseph Myers
   - Remove libnsl.abilist
 - Fixed suggestions from Adhemerval:
   - Use Elf32_Addr and Elf32_Sym on link.h and sotruss-lib.c.
   - Remove the superflous atomic typedefs on atomic-machine.h.
   - Add the _dl_find_object on libc.abilist.
   - Update wording for the NEWS entry.
 - Other fixes
   - Update date to 2022
   - Remove uneeded REGSIZE
   - Remove trailing newlines in Makefile
   - Fix space vs tabs indentation in sysdep.h

Changes since v3:
 - Fix suggestion from Paul Eggert
   - Fix typo pore/port
 - Fixed suggestions from Adhemerval:
   - Used ENTRY/END asm macros where missing
   - Remove block in dl-machine.h suggesting LD_PROFILE
   - Remove jmp_buf-macros.h  macros and use new default.
   - Remove tcb-offsets.sym file and Makefile reference.
   - Remove tcb-offsets.h include in tls.h.
   - Define lib-audit register layout inline with other architectures.
   - Fix usage of locally defined register in or1k_get_got.  Also, fixup
     indentation when using or1k_get_got.
   - Cleanup abilists after rebasing, adding rseq and removing
     empty files.
   - Remove prctl and other unused entries in the linux Makefile.
   - Fix STACK_ALIGN to 4 bytes, from incorrect copy-n-paste 16 bytes.
   - Use default pthreadtypes-arch.h.
   - Mention only soft-float supported in NEWS.
   - Remove sysdeps/unix/sysv/linux/or1k/bits/timesize.h and use new
     default.

Changes since v2:
 - Fixed suggestions from Joseph Myers:
   - Fix comment style, and description on top of each file
   - Make sure macros have parentheses when needed,
   - Bump required kernel down to 5.4.0 and document
   - Regenerate arch-syscall.h
 - Fixed suggestions from Adhemerval:
   - Remove kernel_stat.h
   - Just set MMAP2_PAGE_UNIT to 8K
   - Remove ioctl.c and syscall.c files
 - Update TCB alignment to 32 bytes

Changes since v1:
 - Update api's as suggested by Florian
 - Remove hard float support
 - Updates to get all tests passing
 - Split patch into managable bits similar to recent ARC port

Documentation:

  Architecture / ABI docs:
   https://raw.githubusercontent.com/openrisc/doc/master/openrisc-arch-1.3-rev1.pdf

Test Results:

  build-many-glibcs.py:

   PASS with mainline ang gcc-11.

  Full test suite:

  This time I ran the test suite with timeout of 300 and with patch for forcing
  O_LARGEFILE in open64 [0].  The test has one failure but it seems like flaky
  test as it passed after the second run.

    # results in file: /home/shorne/work/gnu-toolchain/log/test--20211226-162029.log
    # test start:    2021-12-26T16:20:29+09:00

    # failures
    FAIL: posix/tst-execveat   /* Running second time passes */

    # test finish:   2021-12-29T12:54:08+09:00
    # test duration: 2 days 20 hours 33 minutes and 39 seconds
    # test for file: tests.sum
    # test wrapper:  /home/shorne/work/gnu-toolchain/glibc/scripts/cross-test-ssh.sh --timeoutfactor 300 10.0.0.5

    # summary
	  1 FAIL
       4148 PASS
	 31 UNSUPPORTED
	 16 XFAIL
	  2 XPASS

    posix/tst-execveat.out:
	Timed out: killed the child process
	Termination time: 2021-12-29T01:02:42.433964340
	Last write to standard output: 2021-12-28T23:22:40.266363000

    tests.sum: https://gist.github.com/stffrdhrn/88c1fce0c54350258f1f5869068d015a

 [0] https://sourceware.org/pipermail/libc-alpha/2021-December/134634.html

Stafford Horne (13):
  elf: Add reloc for OpenRISC
  linux/syscalls: Add or1k_atomic syscall for OpenRISC
  or1k: ABI Implementation
  or1k: startup and dynamic linking code
  or1k: Thread Local Storage support
  or1k: Atomics and Locking primitives
  or1k: math soft float support
  or1k: Linux Syscall Interface
  or1k: Linux ABI
  or1k: ABI lists
  or1k: Build Infrastructure
  build-many-glibcs.py: add OpenRISC support
  Documentation for OpenRISC port

 NEWS                                          |    9 +
 README                                        |    1 +
 elf/elf.h                                     |   37 +
 scripts/build-many-glibcs.py                  |    5 +
 sysdeps/or1k/Implies                          |    3 +
 sysdeps/or1k/Makefile                         |    6 +
 sysdeps/or1k/__longjmp.S                      |   50 +
 sysdeps/or1k/atomic-machine.h                 |   71 +
 sysdeps/or1k/bits/endianness.h                |   11 +
 sysdeps/or1k/bits/fenv.h                      |   69 +
 sysdeps/or1k/bits/link.h                      |   54 +
 sysdeps/or1k/bits/setjmp.h                    |   32 +
 sysdeps/or1k/bsd-_setjmp.S                    |    1 +
 sysdeps/or1k/bsd-setjmp.S                     |    1 +
 sysdeps/or1k/dl-machine.h                     |  300 +++
 sysdeps/or1k/dl-start.S                       |   98 +
 sysdeps/or1k/dl-tls.h                         |   27 +
 sysdeps/or1k/dl-trampoline.S                  |   73 +
 sysdeps/or1k/jmpbuf-offsets.h                 |   23 +
 sysdeps/or1k/jmpbuf-unwind.h                  |   36 +
 sysdeps/or1k/ldsodefs.h                       |   40 +
 sysdeps/or1k/libc-tls.c                       |   34 +
 sysdeps/or1k/libm-test-ulps                   | 1112 +++++++++
 sysdeps/or1k/libm-test-ulps-name              |    1 +
 sysdeps/or1k/machine-gmon.h                   |   35 +
 sysdeps/or1k/memusage.h                       |   21 +
 sysdeps/or1k/nofpu/Implies                    |    1 +
 sysdeps/or1k/nofpu/math-tests-exceptions.h    |   29 +
 sysdeps/or1k/nofpu/math-tests-rounding.h      |   28 +
 sysdeps/or1k/nptl/pthreaddef.h                |   36 +
 sysdeps/or1k/nptl/tls.h                       |  184 ++
 sysdeps/or1k/preconfigure                     |   33 +
 sysdeps/or1k/setjmp.S                         |   56 +
 sysdeps/or1k/sfp-machine.h                    |   93 +
 sysdeps/or1k/sotruss-lib.c                    |   51 +
 sysdeps/or1k/stackinfo.h                      |   34 +
 sysdeps/or1k/start.S                          |   99 +
 sysdeps/or1k/sysdep.h                         |   80 +
 sysdeps/or1k/tininess.h                       |    1 +
 sysdeps/or1k/tst-audit.h                      |   24 +
 sysdeps/unix/sysv/linux/or1k/Implies          |    3 +
 sysdeps/unix/sysv/linux/or1k/Makefile         |    7 +
 sysdeps/unix/sysv/linux/or1k/arch-syscall.h   |  325 +++
 sysdeps/unix/sysv/linux/or1k/bits/procfs.h    |   38 +
 sysdeps/unix/sysv/linux/or1k/c++-types.data   |   67 +
 sysdeps/unix/sysv/linux/or1k/clone.c          |   61 +
 sysdeps/unix/sysv/linux/or1k/configure        |    4 +
 sysdeps/unix/sysv/linux/or1k/configure.ac     |    4 +
 sysdeps/unix/sysv/linux/or1k/getcontext.S     |   72 +
 sysdeps/unix/sysv/linux/or1k/ld.abilist       |    8 +
 .../sysv/linux/or1k/libBrokenLocale.abilist   |    1 +
 sysdeps/unix/sysv/linux/or1k/libc.abilist     | 2123 +++++++++++++++++
 .../sysv/linux/or1k/libc_malloc_debug.abilist |   26 +
 sysdeps/unix/sysv/linux/or1k/libcrypt.abilist |    2 +
 sysdeps/unix/sysv/linux/or1k/libm.abilist     |  759 ++++++
 .../unix/sysv/linux/or1k/libresolv.abilist    |   55 +
 .../unix/sysv/linux/or1k/libthread_db.abilist |   40 +
 sysdeps/unix/sysv/linux/or1k/localplt.data    |   14 +
 sysdeps/unix/sysv/linux/or1k/makecontext.c    |   77 +
 sysdeps/unix/sysv/linux/or1k/mmap_internal.h  |   28 +
 sysdeps/unix/sysv/linux/or1k/or1k_clone.S     |   89 +
 sysdeps/unix/sysv/linux/or1k/setcontext.S     |  108 +
 sysdeps/unix/sysv/linux/or1k/shlib-versions   |    2 +
 sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h |   28 +
 sysdeps/unix/sysv/linux/or1k/swapcontext.S    |  116 +
 sysdeps/unix/sysv/linux/or1k/sys/ucontext.h   |   53 +
 sysdeps/unix/sysv/linux/or1k/sys/user.h       |    1 +
 sysdeps/unix/sysv/linux/or1k/sysdep.c         |   34 +
 sysdeps/unix/sysv/linux/or1k/sysdep.h         |  201 ++
 sysdeps/unix/sysv/linux/or1k/ucontext_i.sym   |   26 +
 sysdeps/unix/sysv/linux/syscall-names.list    |    1 +
 71 files changed, 7272 insertions(+)
 create mode 100644 sysdeps/or1k/Implies
 create mode 100644 sysdeps/or1k/Makefile
 create mode 100644 sysdeps/or1k/__longjmp.S
 create mode 100644 sysdeps/or1k/atomic-machine.h
 create mode 100644 sysdeps/or1k/bits/endianness.h
 create mode 100644 sysdeps/or1k/bits/fenv.h
 create mode 100644 sysdeps/or1k/bits/link.h
 create mode 100644 sysdeps/or1k/bits/setjmp.h
 create mode 100644 sysdeps/or1k/bsd-_setjmp.S
 create mode 100644 sysdeps/or1k/bsd-setjmp.S
 create mode 100644 sysdeps/or1k/dl-machine.h
 create mode 100644 sysdeps/or1k/dl-start.S
 create mode 100644 sysdeps/or1k/dl-tls.h
 create mode 100644 sysdeps/or1k/dl-trampoline.S
 create mode 100644 sysdeps/or1k/jmpbuf-offsets.h
 create mode 100644 sysdeps/or1k/jmpbuf-unwind.h
 create mode 100644 sysdeps/or1k/ldsodefs.h
 create mode 100644 sysdeps/or1k/libc-tls.c
 create mode 100644 sysdeps/or1k/libm-test-ulps
 create mode 100644 sysdeps/or1k/libm-test-ulps-name
 create mode 100644 sysdeps/or1k/machine-gmon.h
 create mode 100644 sysdeps/or1k/memusage.h
 create mode 100644 sysdeps/or1k/nofpu/Implies
 create mode 100644 sysdeps/or1k/nofpu/math-tests-exceptions.h
 create mode 100644 sysdeps/or1k/nofpu/math-tests-rounding.h
 create mode 100644 sysdeps/or1k/nptl/pthreaddef.h
 create mode 100644 sysdeps/or1k/nptl/tls.h
 create mode 100644 sysdeps/or1k/preconfigure
 create mode 100644 sysdeps/or1k/setjmp.S
 create mode 100644 sysdeps/or1k/sfp-machine.h
 create mode 100644 sysdeps/or1k/sotruss-lib.c
 create mode 100644 sysdeps/or1k/stackinfo.h
 create mode 100644 sysdeps/or1k/start.S
 create mode 100644 sysdeps/or1k/sysdep.h
 create mode 100644 sysdeps/or1k/tininess.h
 create mode 100644 sysdeps/or1k/tst-audit.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/Implies
 create mode 100644 sysdeps/unix/sysv/linux/or1k/Makefile
 create mode 100644 sysdeps/unix/sysv/linux/or1k/arch-syscall.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/bits/procfs.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/c++-types.data
 create mode 100644 sysdeps/unix/sysv/linux/or1k/clone.c
 create mode 100644 sysdeps/unix/sysv/linux/or1k/configure
 create mode 100644 sysdeps/unix/sysv/linux/or1k/configure.ac
 create mode 100644 sysdeps/unix/sysv/linux/or1k/getcontext.S
 create mode 100644 sysdeps/unix/sysv/linux/or1k/ld.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libBrokenLocale.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libc.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libc_malloc_debug.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libcrypt.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libm.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libresolv.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libthread_db.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/localplt.data
 create mode 100644 sysdeps/unix/sysv/linux/or1k/makecontext.c
 create mode 100644 sysdeps/unix/sysv/linux/or1k/mmap_internal.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/or1k_clone.S
 create mode 100644 sysdeps/unix/sysv/linux/or1k/setcontext.S
 create mode 100644 sysdeps/unix/sysv/linux/or1k/shlib-versions
 create mode 100644 sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/swapcontext.S
 create mode 100644 sysdeps/unix/sysv/linux/or1k/sys/ucontext.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/sys/user.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/sysdep.c
 create mode 100644 sysdeps/unix/sysv/linux/or1k/sysdep.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/ucontext_i.sym