starfive-tech/linux.git/tools/include/nolibc, branch rt-linux-release

tools/nolibc: Implement msleep()

2021-07-20T20:42:26+00:00

Allow users to implement shorter delays than a full second by implementing msleep(). Signed-off-by: Mark Brown Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools: include: nolibc: Fix a typo occured to occurred in the file nolibc.h

2021-07-20T20:42:26+00:00

s/occured/occurred/ Signed-off-by: Bhaskar Chowdhury Acked-by: Randy Dunlap Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Fix position of -lgcc in the documented example

2021-01-21T18:06:45+00:00

The documentation header in the nolibc.h file provides an example command line, but it places the -lgcc argument before the source files, which can fail with libgcc.a (e.g. on ARM when uidiv is needed). This commit therefore moves the -lgcc to the end of the command line, hopefully before this example leaks into makefiles. This is a port of nolibc's upstream commit b5e282089223 to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Emit detailed error for missing alternate syscall number definitions

2021-01-21T18:06:45+00:00

Some syscalls can be implemented from different __NR_* variants. For example, sys_dup2() can be implemented based on __NR_dup3 or __NR_dup2. In this case it is useful to mention both alternatives in error messages when neither are detected. This information will help the user search for the right one (e.g __NR_dup3) instead of just the fallback (__NR_dup2) which might not exist on the platform. This is a port of nolibc's upstream commit a21080d2ba41 to the Linux kernel. Suggested-by: Mark Rutland Link: https://lore.kernel.org/lkml/20210120145447.GC77728@C02TD0UTHF1T.local/ Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*

2021-01-21T18:06:45+00:00

The __ARCH_WANT_* definitions were added in order to support aarch64 when it was missing some syscall definitions (including __NR_dup2, __NR_fork, and __NR_getpgrp), but these __ARCH_WANT_* definitions were actually wrong because these syscalls do not exist on this platform. Defining these resulted in exposing invalid definitions, resulting in failures on aarch64. The missing syscalls were since implemented based on the newer ones (__NR_dup3, __NR_clone, __NR_getpgid) so these incorrect __ARCH_WANT_* definitions are no longer needed. Thanks to Mark Rutland for spotting this incorrect analysis and explaining why it was wrong. This is a port of nolibc's upstream commit 00b1b0d9b2a4 to the Linux kernel. Reported-by: Mark Rutland Link: https://lore.kernel.org/lkml/20210119153147.GA5083@paulmck-ThinkPad-P72 Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Get timeval, timespec and timezone from linux/time.h

2021-01-21T18:06:45+00:00

The definitions of timeval(), timespec() and timezone() conflict with linux/time.h when building, so this commit takes them directly from linux/time.h. This is a port of nolibc's upstream commit dc45f5426b0c to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Implement poll() based on ppoll()

2021-01-21T18:06:44+00:00

Some architectures like arm64 do not implement poll() and have to use ppoll() instead. This commit therefore makes poll() use ppoll() when available. This is a port of nolibc's upstream commit 800f75c13ede to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Implement fork() based on clone()

2021-01-21T18:06:44+00:00

Some archs such as arm64 do not have fork() and have to use clone() instead. This commit therefore makes fork() use clone() when available. This requires including signal.h to get the definition of SIGCHLD. This is a port of nolibc's upstream commit d2dc42fd6149 to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Make getpgrp() fall back to getpgid(0)

2021-01-21T18:06:44+00:00

The getpgrp() syscall is not implemented on arm64, so this commit instead uses getpgid(0) when getpgrp() is not available. This is a port of nolibc's upstream commit 2379f25073f9 to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Make dup2() rely on dup3() when available

2021-01-21T18:06:44+00:00

A recent boot failure on 5.4-rc3 on arm64 revealed that sys_dup2() is not available and that only sys_dup3() is implemented. This commit detects this and falls back to sys_dup3() when available. This is a port of nolibc's upstream commit fd5272ec2c66 to the Linux kernel. Tested-by: Valentin Schneider Tested-by: Mark Rutland [arm64] Signed-off-by: Willy Tarreau Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney