[GIT PULL] nolibc changes for 6.6-rc1

[Willy Tarreau <w@1wt.eu>]

Hi Shuah, hi Paul,

I'm sending you the list of planned nolibc changes for 6.6. A doc update
may possibly follow a bit later to try to document the contribution
process. We also noticed a slight increase in binary sizes that might
be fixed soon but I wouldn't bet on this since it will require lot of
testing again and I'd rather postpone this by default. In any case I
have no intent to push any significant updates/fixes for 6.6 at this
point.

I'm also pasting a summary of the changes in this pull request, feel
free to use it for the merge commit message if you need.

For any question or if anything is not clear, do not hesitate to ask!

Thanks,
Willy

----- changes ------
Nolibc:
  - improved portability by removing build errors with -ENOSYS
  - added syscall6() on MIPS to support pselect6() and mmap()
  - added setvbuf(), rmdir(), pipe(), pipe2()
  - add support for ppc/ppc64
  - environ is no longer optional
  - fixed frame pointer issues at -O0
  - dropped sys_stat() in favor of sys_statx()
  - centralized _start_c() to remove lots of asm code
  - switched size_t to __SIZE_TYPE__

Selftests:
  - improved status reporting (success/warning/failure counts, path to log file)
  - various code cleanups (indent, unused variables, ...)
  - more consistent test numbering
  - enabled compiler warnings
  - dropped unreliable chmod_net test
  - improved reliability (create /dev/zero & /tmp, rely less on /proc)
  - new tests (brk/sbrk/mmap/munmap)
  - improved compatibility with musl
  - new run-nolibc-test target to build and run natively
  - new run-libc-test target to build and run against native libc
  - made the cmdline parser more reliable against boolean arguments
  - dropped dependency on memfd for vfprintf() test
  - nolibc-test is no longer stripped
  - added support for extending ARCH via XARCH

Other:
  - add Thomas as co-maintainer
-----------

The following changes since commit 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5:

  Linux 6.5-rc1 (2023-07-09 13:53:13 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git/ 20230806-for-6.6-1

for you to fetch changes up to d98c1e27e46e47a3ae67e1d048f153598ba82611:

  tools/nolibc: stackprotector.h: make __stack_chk_init static (2023-08-06 18:44:47 +0200)

----------------------------------------------------------------
Ryan Roberts (1):
      tools/nolibc/stdio: add setvbuf() to set buffering mode

Thomas Weißschuh (22):
      selftests/nolibc: drop test chmod_net
      selftests/nolibc: simplify call to ioperm
      tools/nolibc: completely remove optional environ support
      selftests/nolibc: make evaluation of test conditions
      selftests/nolibc: simplify status printing
      selftests/nolibc: avoid gaps in test numbers
      selftests/nolibc: avoid buffer underrun in space printing
      tools/nolibc: drop unused variables
      tools/nolibc: fix return type of getpagesize()
      tools/nolibc: setvbuf: avoid unused parameter warnings
      tools/nolibc: sys: avoid implicit sign cast
      tools/nolibc: stdint: use __SIZE_TYPE__ for size_t
      selftests/nolibc: drop unused variables
      selftests/nolibc: mark test helpers as potentially unused
      selftests/nolibc: make functions static if possible
      selftests/nolibc: avoid unused parameter warnings
      selftests/nolibc: avoid sign-compare warnings
      selftests/nolibc: use correct return type for read() and write()
      selftests/nolibc: prevent out of bounds access in expect_vfprintf
      selftests/nolibc: don't strip nolibc-test
      selftests/nolibc: enable compiler warnings
      MAINTAINERS: nolibc: add myself as co-maintainer

Willy Tarreau (1):
      selftests/nolibc: avoid warnings during intptr tests

Yuan Tan (2):
      tools/nolibc: add pipe() and pipe2() support
      selftests/nolibc: add testcase for pipe

Zhangjin Wu (74):
      selftests/nolibc: add a standalone test report macro
      selftests/nolibc: always print the path to test log file
      selftests/nolibc: restore the failed tests print
      tools/nolibc: fix up #error compile failures with -ENOSYS
      tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS
      tools/nolibc: sys.h: add a syscall return helper
      tools/nolibc: unistd.h: apply __sysret() helper
      tools/nolibc: sys.h: apply __sysret() helper
      tools/nolibc: unistd.h: reorder the syscall macros
      tools/nolibc: arch-*.h: fix up code indent errors
      toolc/nolibc: arch-*.h: clean up whitespaces after __asm__
      tools/nolibc: arch-loongarch.h: shrink with _NOLIBC_SYSCALL_CLOBBERLIST
      tools/nolibc: arch-mips.h: shrink with _NOLIBC_SYSCALL_CLOBBERLIST
      tools/nolibc: add missing my_syscall6() for mips
      tools/nolibc: __sysret: support syscalls who return a pointer
      tools/nolibc: clean up mmap() routine
      tools/nolibc: clean up sbrk() routine
      selftests/nolibc: export argv0 for some tests
      selftests/nolibc: prepare: create /dev/zero
      selftests/nolibc: add EXPECT_PTREQ, EXPECT_PTRNE and EXPECT_PTRER
      selftests/nolibc: add sbrk_0 to test current brk getting
      selftests/nolibc: add mmap_bad test case
      selftests/nolibc: add munmap_bad test case
      selftests/nolibc: add mmap_munmap_good test case
      selftests/nolibc: add run-libc-test target
      selftests/nolibc: stat_fault: silence NULL argument warning with glibc
      selftests/nolibc: gettid: restore for glibc and musl
      selftests/nolibc: add _LARGEFILE64_SOURCE for musl
      selftests/nolibc: fix up int_fast16/32_t test cases for musl
      tools/nolibc: types.h: add RB_ flags for reboot()
      selftests/nolibc: prefer <sys/reboot.h> to <linux/reboot.h>
      selftests/nolibc: fix up kernel parameters support
      selftests/nolibc: link_cross: use /proc/self/cmdline
      tools/nolibc: add rmdir() support
      selftests/nolibc: add a new rmdir() test case
      selftests/nolibc: fix up failures when CONFIG_PROC_FS=n
      selftests/nolibc: prepare /tmp for tests that need to write
      selftests/nolibc: vfprintf: remove MEMFD_CREATE dependency
      selftests/nolibc: chdir_root: restore current path after test
      selftests/nolibc: stat_timestamps: remove procfs dependency
      selftests/nolibc: chroot_exe: remove procfs dependency
      selftests/nolibc: add chmod_argv0 test
      selftests/nolibc: report: print a summarized test status
      selftests/nolibc: report: print total tests
      selftests/nolibc: report: align passed, skipped and failed
      selftests/nolibc: report: extrude the test status line
      selftests/nolibc: report: add newline before test failures
      tools/nolibc: arch-*.h: add missing space after ','
      tools/nolibc: fix up startup failures for -O0 under gcc < 11.1.0
      tools/nolibc: remove the old sys_stat support
      tools/nolibc: add new crt.h with _start_c
      tools/nolibc: stackprotector.h: add empty __stack_chk_init for !_NOLIBC_STACKPROTECTOR
      tools/nolibc: crt.h: initialize stack protector
      tools/nolibc: arm: shrink _start with _start_c
      tools/nolibc: aarch64: shrink _start with _start_c
      tools/nolibc: i386: shrink _start with _start_c
      tools/nolibc: x86_64: shrink _start with _start_c
      tools/nolibc: mips: shrink _start with _start_c
      tools/nolibc: loongarch: shrink _start with _start_c
      tools/nolibc: riscv: shrink _start with _start_c
      tools/nolibc: s390: shrink _start with _start_c
      selftests/nolibc: add EXPECT_PTRGE, EXPECT_PTRGT, EXPECT_PTRLE, EXPECT_PTRLT
      selftests/nolibc: add testcases for startup code
      selftests/nolibc: allow run nolibc-test locally
      selftests/nolibc: allow test -include /path/to/nolibc.h
      selftests/nolibc: mmap_munmap_good: fix up return value
      tools/nolibc: add support for powerpc
      tools/nolibc: add support for powerpc64
      selftests/nolibc: add XARCH and ARCH mapping support
      selftests/nolibc: add test support for ppc
      selftests/nolibc: add test support for ppc64le
      selftests/nolibc: add test support for ppc64
      selftests/nolibc: allow report with existing test log
      tools/nolibc: stackprotector.h: make __stack_chk_init static

 MAINTAINERS                                  |   1 +
 tools/include/nolibc/Makefile                |   1 +
 tools/include/nolibc/arch-aarch64.h          |  85 +---
 tools/include/nolibc/arch-arm.h              | 111 +----
 tools/include/nolibc/arch-i386.h             |  86 +---
 tools/include/nolibc/arch-loongarch.h        |  83 +---
 tools/include/nolibc/arch-mips.h             | 147 +++----
 tools/include/nolibc/arch-powerpc.h          | 213 ++++++++++
 tools/include/nolibc/arch-riscv.h            |  83 +---
 tools/include/nolibc/arch-s390.h             |  77 +---
 tools/include/nolibc/arch-x86_64.h           |  86 +---
 tools/include/nolibc/arch.h                  |   2 +
 tools/include/nolibc/crt.h                   |  61 +++
 tools/include/nolibc/nolibc.h                |   9 +-
 tools/include/nolibc/stackprotector.h        |   5 +-
 tools/include/nolibc/stdint.h                |   2 +-
 tools/include/nolibc/stdio.h                 |  27 ++
 tools/include/nolibc/stdlib.h                |  12 +-
 tools/include/nolibc/sys.h                   | 554 +++++++-----------------
 tools/include/nolibc/types.h                 |  22 +-
 tools/include/nolibc/unistd.h                |  13 +-
 tools/testing/selftests/nolibc/Makefile      | 109 +++--
 tools/testing/selftests/nolibc/nolibc-test.c | 609 ++++++++++++++++++++-------
 23 files changed, 1216 insertions(+), 1182 deletions(-)
 create mode 100644 tools/include/nolibc/arch-powerpc.h
 create mode 100644 tools/include/nolibc/crt.h