[0/1] OpenRISC port

  Hi All,

This is the patch for the OpenRISC port of glibc.

DEVELOPMENT

The original patch was put together by Christian Scensson a few years ago.  I
have taken the patch and finished all of the TODO items and run and fixed all of
the test failures.

BUILDING and TESTING

Testing has been done with the qemu OpenRISC simulator using the build and run
scripts found here:

 - https://github.com/stffrdhrn/or1k-utils/tree/master/glibc

Running the tests I found a few issues with binutils, gcc and the OpenRISC
architecture as well, patches for binutils are upstream and gcc should be
upstream soon:

 - Binutils: use latest master
 - GCC: https://github.com/stffrdhrn/gcc/commits/or1k-glibc-1
 - QEMU: https://github.com/stffrdhrn/qemu/commits/or1k-glibc (FPU issues)

TEST RESULTS

Pretty much all tests are passing however there are several math (fpu) tests
which are failing due to issues with setting underflow/overflow flags.  These
seem consistent with issues reported by other architectures.  Is there a known
issue here?

I can provide more details.

-Stafford

Christian Svensson (1):
  Initial support for OpenRISC

 elf/elf.h                                     |   37 +
 sysdeps/or1k/Implies                          |    4 +
 sysdeps/or1k/Makefile                         |    7 +
 sysdeps/or1k/__longjmp.S                      |   55 +
 sysdeps/or1k/atomic-machine.h                 |   77 +
 sysdeps/or1k/bits/atomic.h                    |   51 +
 sysdeps/or1k/bits/endianness.h                |   11 +
 sysdeps/or1k/bits/fenv.h                      |   79 +
 sysdeps/or1k/bits/link.h                      |   51 +
 sysdeps/or1k/bits/setjmp.h                    |   36 +
 sysdeps/or1k/bsd-_setjmp.S                    |    1 +
 sysdeps/or1k/bsd-setjmp.S                     |    1 +
 sysdeps/or1k/dl-machine.h                     |  339 +++
 sysdeps/or1k/dl-start.S                       |  101 +
 sysdeps/or1k/dl-tls.h                         |   28 +
 sysdeps/or1k/dl-trampoline.S                  |   82 +
 sysdeps/or1k/fpu/fclrexcpt.c                  |   41 +
 sysdeps/or1k/fpu/fegetenv.c                   |   32 +
 sysdeps/or1k/fpu/fegetmode.c                  |   27 +
 sysdeps/or1k/fpu/fegetround.c                 |   34 +
 sysdeps/or1k/fpu/feholdexcpt.c                |   41 +
 sysdeps/or1k/fpu/fesetenv.c                   |   35 +
 sysdeps/or1k/fpu/fesetexcept.c                |   32 +
 sysdeps/or1k/fpu/fesetmode.c                  |   42 +
 sysdeps/or1k/fpu/fesetround.c                 |   44 +
 sysdeps/or1k/fpu/feupdateenv.c                |   44 +
 sysdeps/or1k/fpu/fgetexcptflg.c               |   37 +
 sysdeps/or1k/fpu/fraiseexcpt.c                |   82 +
 sysdeps/or1k/fpu/fsetexcptflg.c               |   40 +
 sysdeps/or1k/fpu/ftestexcept.c                |   32 +
 sysdeps/or1k/fpu/get-rounding-mode.h          |   38 +
 sysdeps/or1k/fpu_control.h                    |   49 +
 sysdeps/or1k/jmpbuf-offsets.h                 |   23 +
 sysdeps/or1k/jmpbuf-unwind.h                  |   35 +
 sysdeps/or1k/ldsodefs.h                       |   40 +
 sysdeps/or1k/libc-tls.c                       |   32 +
 sysdeps/or1k/libm-test-ulps                   | 1107 +++++++++
 sysdeps/or1k/libm-test-ulps-name              |    1 +
 sysdeps/or1k/machine-gmon.h                   |   24 +
 sysdeps/or1k/math-tests-trap.h                |   27 +
 sysdeps/or1k/memusage.h                       |   20 +
 sysdeps/or1k/nofpu/Implies                    |    1 +
 sysdeps/or1k/nofpu/math-tests-exceptions.h    |   29 +
 sysdeps/or1k/nofpu/math-tests-rounding.h      |   28 +
 sysdeps/or1k/nptl/Makefile                    |   21 +
 sysdeps/or1k/nptl/bits/pthreadtypes-arch.h    |   48 +
 sysdeps/or1k/nptl/bits/semaphore.h            |   34 +
 sysdeps/or1k/nptl/pthreaddef.h                |   32 +
 sysdeps/or1k/nptl/tcb-offsets.sym             |    6 +
 sysdeps/or1k/nptl/tls.h                       |  193 ++
 sysdeps/or1k/preconfigure                     |   38 +
 sysdeps/or1k/setjmp.S                         |   56 +
 sysdeps/or1k/sfp-machine.h                    |  102 +
 sysdeps/or1k/sotruss-lib.c                    |   51 +
 sysdeps/or1k/stackinfo.h                      |   33 +
 sysdeps/or1k/start.S                          |  116 +
 sysdeps/or1k/sysdep.h                         |   77 +
 sysdeps/or1k/tininess.h                       |    1 +
 sysdeps/or1k/tls-macros.h                     |   82 +
 sysdeps/or1k/tst-audit.h                      |   24 +
 sysdeps/unix/sysv/linux/or1k/Implies          |    3 +
 sysdeps/unix/sysv/linux/or1k/Makefile         |   12 +
 sysdeps/unix/sysv/linux/or1k/arch-syscall.h   |  315 +++
 sysdeps/unix/sysv/linux/or1k/bits/fcntl.h     |   49 +
 sysdeps/unix/sysv/linux/or1k/bits/mman.h      |   44 +
 sysdeps/unix/sysv/linux/or1k/c++-types.data   |   67 +
 sysdeps/unix/sysv/linux/or1k/clone.c          |   59 +
 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/ioctl.c          |   40 +
 sysdeps/unix/sysv/linux/or1k/jmp_buf-macros.h |   41 +
 .../unix/sysv/linux/or1k/kernel-features.h    |   24 +
 sysdeps/unix/sysv/linux/or1k/ld.abilist       |    5 +
 .../sysv/linux/or1k/libBrokenLocale.abilist   |    1 +
 sysdeps/unix/sysv/linux/or1k/libanl.abilist   |    4 +
 sysdeps/unix/sysv/linux/or1k/libc.abilist     | 2081 +++++++++++++++++
 sysdeps/unix/sysv/linux/or1k/libcrypt.abilist |    2 +
 sysdeps/unix/sysv/linux/or1k/libdl.abilist    |    9 +
 sysdeps/unix/sysv/linux/or1k/libm.abilist     |  699 ++++++
 sysdeps/unix/sysv/linux/or1k/libnsl.abilist   |  121 +
 .../unix/sysv/linux/or1k/libpthread.abilist   |  216 ++
 .../unix/sysv/linux/or1k/libresolv.abilist    |   79 +
 sysdeps/unix/sysv/linux/or1k/librt.abilist    |   35 +
 .../unix/sysv/linux/or1k/libthread_db.abilist |   40 +
 sysdeps/unix/sysv/linux/or1k/libutil.abilist  |    6 +
 sysdeps/unix/sysv/linux/or1k/localplt.data    |   13 +
 sysdeps/unix/sysv/linux/or1k/lowlevellock.h   |   23 +
 sysdeps/unix/sysv/linux/or1k/makecontext.c    |   77 +
 sysdeps/unix/sysv/linux/or1k/mmap_internal.h  |   29 +
 sysdeps/unix/sysv/linux/or1k/or1k_clone.S     |  112 +
 sysdeps/unix/sysv/linux/or1k/prctl.c          |   41 +
 sysdeps/unix/sysv/linux/or1k/pt-vfork.c       |   30 +
 sysdeps/unix/sysv/linux/or1k/setcontext.S     |  110 +
 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/procfs.h     |  120 +
 sysdeps/unix/sysv/linux/or1k/sys/ucontext.h   |   48 +
 sysdeps/unix/sysv/linux/or1k/sys/user.h       |    1 +
 sysdeps/unix/sysv/linux/or1k/syscall.c        |   45 +
 sysdeps/unix/sysv/linux/or1k/sysdep.c         |   33 +
 sysdeps/unix/sysv/linux/or1k/sysdep.h         |  167 ++
 sysdeps/unix/sysv/linux/or1k/ucontext_i.sym   |   26 +
 sysdeps/unix/sysv/linux/syscall-names.list    |    1 +
 105 files changed, 8945 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/atomic.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/fpu/fclrexcpt.c
 create mode 100644 sysdeps/or1k/fpu/fegetenv.c
 create mode 100644 sysdeps/or1k/fpu/fegetmode.c
 create mode 100644 sysdeps/or1k/fpu/fegetround.c
 create mode 100644 sysdeps/or1k/fpu/feholdexcpt.c
 create mode 100644 sysdeps/or1k/fpu/fesetenv.c
 create mode 100644 sysdeps/or1k/fpu/fesetexcept.c
 create mode 100644 sysdeps/or1k/fpu/fesetmode.c
 create mode 100644 sysdeps/or1k/fpu/fesetround.c
 create mode 100644 sysdeps/or1k/fpu/feupdateenv.c
 create mode 100644 sysdeps/or1k/fpu/fgetexcptflg.c
 create mode 100644 sysdeps/or1k/fpu/fraiseexcpt.c
 create mode 100644 sysdeps/or1k/fpu/fsetexcptflg.c
 create mode 100644 sysdeps/or1k/fpu/ftestexcept.c
 create mode 100644 sysdeps/or1k/fpu/get-rounding-mode.h
 create mode 100644 sysdeps/or1k/fpu_control.h
 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/math-tests-trap.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/Makefile
 create mode 100644 sysdeps/or1k/nptl/bits/pthreadtypes-arch.h
 create mode 100644 sysdeps/or1k/nptl/bits/semaphore.h
 create mode 100644 sysdeps/or1k/nptl/pthreaddef.h
 create mode 100644 sysdeps/or1k/nptl/tcb-offsets.sym
 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/tls-macros.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/fcntl.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/bits/mman.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/ioctl.c
 create mode 100644 sysdeps/unix/sysv/linux/or1k/jmp_buf-macros.h
 create mode 100644 sysdeps/unix/sysv/linux/or1k/kernel-features.h
 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/libanl.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libc.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libcrypt.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libdl.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libm.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libnsl.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libpthread.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libresolv.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/librt.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libthread_db.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/libutil.abilist
 create mode 100644 sysdeps/unix/sysv/linux/or1k/localplt.data
 create mode 100644 sysdeps/unix/sysv/linux/or1k/lowlevellock.h
 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/prctl.c
 create mode 100644 sysdeps/unix/sysv/linux/or1k/pt-vfork.c
 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/procfs.h
 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/syscall.c
 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
  

On Fri, 22 May 2020, Stafford Horne via Libc-alpha wrote:

> Hi All,
> 
> This is the patch for the OpenRISC port of glibc.

Please see <https://sourceware.org/glibc/wiki/NewPorts> for information to 
include in a new port submission.  That includes pointing to architecture 
and ABI manuals.

> The original patch was put together by Christian Scensson a few years ago.  I
> have taken the patch and finished all of the TODO items and run and fixed all of
> the test failures.

Do you mean Christian Svensson?  (There's a copyright assignment from 
Christian Svensson for GCC GLIBC BINUTILS from 2014.)

> TEST RESULTS
> 
> Pretty much all tests are passing however there are several math (fpu) tests
> which are failing due to issues with setting underflow/overflow flags.  These

There should not be any such failures with a correct port and architecture 
implementation.

> I can provide more details.

Full test results should be provided (see the above mentioned wiki page).
  

On Fri, May 22, 2020 at 06:52:20PM +0000, Joseph Myers wrote:
> On Fri, 22 May 2020, Stafford Horne via Libc-alpha wrote:
> 
> > Hi All,
> > 
> > This is the patch for the OpenRISC port of glibc.
> 
> Please see <https://sourceware.org/glibc/wiki/NewPorts> for information to 
> include in a new port submission.  That includes pointing to architecture 
> and ABI manuals.

Thank you for the pointers, I will include this in v2.  But the architecture
manual is here:

 - Page: https://openrisc.io/architecture
 - PDF: https://raw.githubusercontent.com/openrisc/doc/master/openrisc-arch-1.3-rev1.pdf

 - Architecture Revision Required for Full Hard Float support:
  - https://openrisc.io/proposals/p17-user-mode-fpcsr

> > The original patch was put together by Christian Scensson a few years ago.  I
> > have taken the patch and finished all of the TODO items and run and fixed all of
> > the test failures.
> 
> Do you mean Christian Svensson?  (There's a copyright assignment from 
> Christian Svensson for GCC GLIBC BINUTILS from 2014.)

Yes Christian Svensson, sorry for the typo.  He is listed in the changelog on
the patch.

> 
> > TEST RESULTS
> > 
> > Pretty much all tests are passing however there are several math (fpu) tests
> > which are failing due to issues with setting underflow/overflow flags.  These
> 
> There should not be any such failures with a correct port and architecture 
> implementation.

OK, I will look into it again.  The last I remember there was somethign strange
happening with underflow exception not being set in the GCC FPU emulation code.

Note, the OpenRISC implementation I tested with has only 32-bit FPU hard
support.  This meant that C API for log/cos/sin etc which internally are defined
to use 64-bit double's all end up using emulation.

> > I can provide more details.
> 
> Full test results should be provided (see the above mentioned wiki page).

I will do with the next round of patches.  This is all very helpful.

-Stafford