[GIT PULL] nolibc changes for v6.7

[Paul E. McKenney]

Hello, Linus,

Please please pull the latest nolibc changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git tags/nolibc.2023.10.23a
  # HEAD: b8c60e8fc6f755c2cdf7164931afdbfa670c6646: selftests/nolibc: add tests for multi-object linkage (2023-10-12 21:14:20 +0200)

----------------------------------------------------------------
nolibc updates for v6.7

o	Add stdarg.h header and a few additional system-call upgrades.

o	Add support for constructors and destructors.

o	Add tests to verify the ability to link multiple .o files
	against nolibc.

o	Numerous string-function optimizations and improvements.

o	Prevent redundant kernel relinks by avoiding embedding of
	initramfs into the kernel image.

o	Allow building i386 with multiarch compiler and make ppc64le
	use qemu-system-ppc64.

o	Miscellaneous fixups, including addition of -nostdinc for
	nolibc-test, avoiding -Wstringop-overflow warnings, and avoiding
	unused parameter warnings for ENOSYS fallbacks.

----------------------------------------------------------------
Ammar Faizi (4):
      tools/nolibc: x86-64: Use `rep movsb` for `memcpy()` and `memmove()`
      tools/nolibc: x86-64: Use `rep stosb` for `memset()`
      tools/nolibc: string: Remove the `_nolibc_memcpy_down()` function
      tools/nolibc: string: Remove the `_nolibc_memcpy_up()` function

Thomas Weißschuh (12):
      tools/nolibc: add stdarg.h header
      selftests/nolibc: use -nostdinc for nolibc-test
      selftests/nolibc: libc-test: avoid -Wstringop-overflow warnings
      selftests/nolibc: don't embed initramfs into kernel image
      selftests/nolibc: allow building i386 with multiarch compiler
      tools/nolibc: avoid unused parameter warnings for ENOSYS fallbacks
      tools/nolibc: don't define new syscall number
      tools/nolibc: automatically detect necessity to use pselect6
      tools/nolibc: drop test for getauxval(AT_PAGESZ)
      tools/nolibc: add support for constructors and destructors
      selftests/nolibc: use qemu-system-ppc64 for ppc64le
      selftests/nolibc: add tests for multi-object linkage

 tools/include/nolibc/Makefile                      |  1 +
 tools/include/nolibc/arch-aarch64.h                |  3 --
 tools/include/nolibc/arch-loongarch.h              |  4 +-
 tools/include/nolibc/arch-riscv.h                  |  3 --
 tools/include/nolibc/arch-x86_64.h                 | 42 ++++++++++++++++
 tools/include/nolibc/crt.h                         | 23 ++++++++-
 tools/include/nolibc/nolibc.h                      |  4 +-
 tools/include/nolibc/stdarg.h                      | 16 ++++++
 tools/include/nolibc/stdio.h                       |  3 +-
 tools/include/nolibc/string.h                      | 36 +++++---------
 tools/include/nolibc/sys.h                         | 57 +++++++++++++---------
 tools/testing/selftests/nolibc/.gitignore          |  1 +
 tools/testing/selftests/nolibc/Makefile            | 57 +++++++++++++---------
 .../testing/selftests/nolibc/nolibc-test-linkage.c | 26 ++++++++++
 .../testing/selftests/nolibc/nolibc-test-linkage.h |  9 ++++
 tools/testing/selftests/nolibc/nolibc-test.c       | 28 +++++++++--
 16 files changed, 225 insertions(+), 88 deletions(-)
 create mode 100644 tools/include/nolibc/stdarg.h
 create mode 100644 tools/testing/selftests/nolibc/nolibc-test-linkage.c
 create mode 100644 tools/testing/selftests/nolibc/nolibc-test-linkage.h