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Message-Id: <20240506180112.1045944-1-jcmvbkbc@gmail.com>
Date: Mon,  6 May 2024 11:01:11 -0700
From: Max Filippov <jcmvbkbc@...il.com>
To: musl@...ts.openwall.com
Cc: Rich Felker <dalias@...c.org>,
	Max Filippov <jcmvbkbc@...il.com>
Subject: [RFC v3 0/1] xtensa FDPIC port

Hello,

this is the third RFC version of the xtensa FDPIC port for musl.
It corresponds to the xtensa FDPIC ABI specification version 1
available here:

  https://github.com/jcmvbkbc/xtensa-abi/blob/master/fdpic-xtensa.txt

The following binutils and gcc can be used to build the
xtensa-linux-muslfdpic toolchain:

  https://github.com/jcmvbkbc/binutils-gdb-xtensa tag xtensa-fdpic-abi-spec-1.2
  https://github.com/jcmvbkbc/gcc-xtensa tag xtensa-fdpic-abi-spec-1.2

I've tested this version with libc-test using QEMU linux-user and full
system emulation. The results in the linux-user are the following:

  FAIL src/functional/pthread_mutex_pi-static.exe [status 1]
  FAIL src/functional/pthread_mutex_pi.exe [status 1]
  FAIL src/functional/pthread_robust-static.exe [timed out]
  FAIL src/functional/pthread_robust.exe [timed out]
  FAIL src/functional/strptime-static.exe [status 1]
  FAIL src/functional/strptime.exe [status 1]
  FAIL src/math/acoshl.exe [status 1]
  FAIL src/math/asinhl.exe [status 1]
  FAIL src/math/erfcl.exe [status 1]
  FAIL src/math/fma.exe [status 1]
  FAIL src/math/fmal.exe [status 1]
  FAIL src/math/lgammal.exe [status 1]
  FAIL src/math/tgammal.exe [status 1]
  FAIL src/regression/pthread-robust-detach-static.exe [status 1]
  FAIL src/regression/pthread-robust-detach.exe [status 1]

functional/ and regression/ pthread-related failures are expected
because PI mutexes and robust list functions are not available in
the linux-user mode. These particular tests pass in full system
emulation.

math tests fail with ULP differences.

Max Filippov (1):
  xtensa: add port

 arch/xtensa/arch.mak                  |   1 +
 arch/xtensa/atomic_arch.h             |  25 ++
 arch/xtensa/bits/alltypes.h.in        |  27 ++
 arch/xtensa/bits/float.h              |  16 +
 arch/xtensa/bits/ioctl.h              | 219 ++++++++++++++
 arch/xtensa/bits/ipcstat.h            |   1 +
 arch/xtensa/bits/limits.h             |   1 +
 arch/xtensa/bits/mman.h               |  20 ++
 arch/xtensa/bits/msg.h                |  27 ++
 arch/xtensa/bits/poll.h               |   3 +
 arch/xtensa/bits/posix.h              |   2 +
 arch/xtensa/bits/reg.h                |   2 +
 arch/xtensa/bits/sem.h                |  22 ++
 arch/xtensa/bits/setjmp.h             |   1 +
 arch/xtensa/bits/shm.h                |  29 ++
 arch/xtensa/bits/signal.h             |  92 ++++++
 arch/xtensa/bits/stat.h               |  23 ++
 arch/xtensa/bits/stdint.h             |  20 ++
 arch/xtensa/bits/syscall.h.in         | 407 ++++++++++++++++++++++++++
 arch/xtensa/bits/user.h               |   4 +
 arch/xtensa/crt_arch.h                |  47 +++
 arch/xtensa/kstat.h                   |  18 ++
 arch/xtensa/pthread_arch.h            |  11 +
 arch/xtensa/reloc.h                   |  32 ++
 arch/xtensa/syscall_arch.h            | 104 +++++++
 configure                             |   8 +
 crt/xtensa/crti.S                     |  23 ++
 crt/xtensa/crtn.S                     |  15 +
 include/elf.h                         |  74 +++++
 src/internal/xtensa/syscall.s         |  14 +
 src/ldso/xtensa/dlsym.s               |   7 +
 src/ldso/xtensa/dlsym_time64.S        |   3 +
 src/ldso/xtensa/tlsdesc.s             |  25 ++
 src/process/xtensa/vfork.s            |  15 +
 src/setjmp/xtensa/longjmp.s           |  18 ++
 src/setjmp/xtensa/setjmp.s            |  21 ++
 src/signal/xtensa/restore.s           |  10 +
 src/signal/xtensa/sigsetjmp.s         |  22 ++
 src/thread/xtensa/__set_thread_area.c |   9 +
 src/thread/xtensa/__unmapself.s       |   9 +
 src/thread/xtensa/clone.S             |  42 +++
 src/thread/xtensa/syscall_cp.s        |  34 +++
 42 files changed, 1503 insertions(+)
 create mode 100644 arch/xtensa/arch.mak
 create mode 100644 arch/xtensa/atomic_arch.h
 create mode 100644 arch/xtensa/bits/alltypes.h.in
 create mode 100644 arch/xtensa/bits/float.h
 create mode 100644 arch/xtensa/bits/ioctl.h
 create mode 100644 arch/xtensa/bits/ipcstat.h
 create mode 100644 arch/xtensa/bits/limits.h
 create mode 100644 arch/xtensa/bits/mman.h
 create mode 100644 arch/xtensa/bits/msg.h
 create mode 100644 arch/xtensa/bits/poll.h
 create mode 100644 arch/xtensa/bits/posix.h
 create mode 100644 arch/xtensa/bits/reg.h
 create mode 100644 arch/xtensa/bits/sem.h
 create mode 100644 arch/xtensa/bits/setjmp.h
 create mode 100644 arch/xtensa/bits/shm.h
 create mode 100644 arch/xtensa/bits/signal.h
 create mode 100644 arch/xtensa/bits/stat.h
 create mode 100644 arch/xtensa/bits/stdint.h
 create mode 100644 arch/xtensa/bits/syscall.h.in
 create mode 100644 arch/xtensa/bits/user.h
 create mode 100644 arch/xtensa/crt_arch.h
 create mode 100644 arch/xtensa/kstat.h
 create mode 100644 arch/xtensa/pthread_arch.h
 create mode 100644 arch/xtensa/reloc.h
 create mode 100644 arch/xtensa/syscall_arch.h
 create mode 100644 crt/xtensa/crti.S
 create mode 100644 crt/xtensa/crtn.S
 create mode 100644 src/internal/xtensa/syscall.s
 create mode 100644 src/ldso/xtensa/dlsym.s
 create mode 100644 src/ldso/xtensa/dlsym_time64.S
 create mode 100644 src/ldso/xtensa/tlsdesc.s
 create mode 100644 src/process/xtensa/vfork.s
 create mode 100644 src/setjmp/xtensa/longjmp.s
 create mode 100644 src/setjmp/xtensa/setjmp.s
 create mode 100644 src/signal/xtensa/restore.s
 create mode 100644 src/signal/xtensa/sigsetjmp.s
 create mode 100644 src/thread/xtensa/__set_thread_area.c
 create mode 100644 src/thread/xtensa/__unmapself.s
 create mode 100644 src/thread/xtensa/clone.S
 create mode 100644 src/thread/xtensa/syscall_cp.s

-- 
2.39.2

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