dda0ba40da
Pull nolibc updates from Paul McKenney:
"Most notably greatly improved testing. These tests are located in
tools/testing/selftests/nolibc. The output of "make help" is as
follows:
Supported targets under selftests/nolibc:
all call the "run" target below
help this help
sysroot create the nolibc sysroot here (uses $ARCH)
nolibc-test build the executable (uses $CC and $CROSS_COMPILE)
initramfs prepare the initramfs with nolibc-test
defconfig create a fresh new default config (uses $ARCH)
kernel (re)build the kernel with the initramfs (uses $ARCH)
run runs the kernel in QEMU after building it (uses $ARCH, $TEST)
rerun runs a previously prebuilt kernel in QEMU (uses $ARCH, $TEST)
clean clean the sysroot, initramfs, build and output files
The output file is "run.out". Test ranges may be passed using $TEST.
Currently using the following variables:
ARCH = x86
CROSS_COMPILE =
CC = gcc
OUTPUT = /home/git/linux-rcu/tools/testing/selftests/nolibc/
TEST =
QEMU_ARCH = x86_64 [determined from $ARCH]
IMAGE_NAME = bzImage [determined from $ARCH]
The output of a successful x86 "make run" is currently as follows,
with kernel build output omitted:
$ make run
71 test(s) passed."
* tag 'nolibc.2022.09.30a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
selftests/nolibc: Avoid generated files being committed
selftests/nolibc: add a "help" target
selftests/nolibc: "sysroot" target installs a local copy of the sysroot
selftests/nolibc: add a "run" target to start the kernel in QEMU
selftests/nolibc: add a "defconfig" target
selftests/nolibc: add a "kernel" target to build the kernel with the initramfs
selftests/nolibc: support glibc as well
selftests/nolibc: condition some tests on /proc existence
selftests/nolibc: recreate and populate /dev and /proc if missing
selftests/nolibc: on x86, support exiting with isa-debug-exit
selftests/nolibc: exit with poweroff on success when getpid() == 1
selftests/nolibc: add a few tests for some libc functions
selftests/nolibc: implement a few tests for various syscalls
selftests/nolibc: support a test definition format
selftests/nolibc: add basic infrastructure to ease creation of nolibc tests
tools/nolibc: make sys_mmap() automatically use the right __NR_mmap definition
tools/nolibc: fix build warning in sys_mmap() when my_syscall6 is not defined
tools/nolibc: make argc 32-bit in riscv startup code
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.