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2021-07-20tools/nolibc: Implement msleep()Mark Brown
Allow users to implement shorter delays than a full second by implementing msleep(). Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-07-20tools: include: nolibc: Fix a typo occured to occurred in the file nolibc.hBhaskar Chowdhury
s/occured/occurred/ Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Fix position of -lgcc in the documented exampleWilly Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Emit detailed error for missing alternate syscall number ↵Willy Tarreau
definitions 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 <mark.rutland@arm.com> Link: https://lore.kernel.org/lkml/20210120145447.GC77728@C02TD0UTHF1T.local/ Tested-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*Willy Tarreau
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 <mark.rutland@arm.com> Link: https://lore.kernel.org/lkml/20210119153147.GA5083@paulmck-ThinkPad-P72 Tested-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Get timeval, timespec and timezone from linux/time.hWilly Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Implement poll() based on ppoll()Willy Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Implement fork() based on clone()Willy Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Make getpgrp() fall back to getpgid(0)Willy Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Make dup2() rely on dup3() when availableWilly Tarreau
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 <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-21tools/nolibc: Add the definition for dup()Willy Tarreau
This commit adds the dup() function, which was omitted when sys_dup() was defined. This is a port of nolibc's upstream commit 47cc42a79c92 to the Linux kernel. Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc") Tested-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-11-06tools/nolibc: Fix a spelling error in a commentBhaskar Chowdhury
Fix a spelling in the comment line. s/memry/memory/p This is on linux-next. Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-11-06rcutorture/nolibc: Fix a typo in header fileSamuel Hernandez
This fixes a typo. Before this, the AT_FDCWD macro would be defined regardless of whether or not it's been defined before. Signed-off-by: Samuel Hernandez <sam.hernandez.amador@gmail.com> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2019-05-08tool headers nolibc: add RISCV supportPranith Kumar
This adds support for the RISCV architecture (32 and 64 bit) to the nolibc header file. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> [willy: minimal rewording of the commit message] Signed-off-by: Willy Tarreau <w@1wt.eu>
2019-01-25tools headers: Move the nolibc header from rcutorture to tools/include/nolibc/Willy Tarreau
As suggested by Ingo, this header file might benefit other tools than just rcutorture. For now it's quite limited, but is easy to extend, so exposing it into tools/include/nolibc/ will make it much easier to adopt by other tools. The mkinitrd.sh script in rcutorture was updated to use this new location. Cc: Ingo Molnar <mingo@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
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