Changes in syscall.h

2eb64b936d3b6332ae44bbf91277f912be5597e2 - tools/nolibc: add the _syscall() macro

Sun, 05 Apr 2026 11:06:25 +0200

tools/nolibc: add the _syscall() macroThe standard syscall() function or macro uses the libc return valueconvention. Errors returned from the kernel as negative values arestored in errno and -1 is returned. Users who want to avoid usingerrno don't have a way to call raw syscalls and check the returnederror.Add a new macro _syscall() which works like the standard syscall()but passes through the return value from the kernel unchanged.The naming scheme and return values match the named _sys_foo()system call wrappers already part of nolibc.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-3-e5b12bc63211@weissschuh.net List of files: /linux/tools/include/nolibc/sys/syscall.h

022bbb5a41fd6463887dfb7de22f5be8262239a7 - tools/nolibc: move the call to __sysret() into syscall()

Sun, 05 Apr 2026 11:06:24 +0200

tools/nolibc: move the call to __sysret() into syscall()__sysret() transforms the return value from the kernel into the libcreturn value convention. There is no reason for it to be called in themiddle of the internals of the syscall() implementation macros.Move the call up, directly into syscall(), to make the code simpler.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-2-e5b12bc63211@weissschuh.net List of files: /linux/tools/include/nolibc/sys/syscall.h

3f5059f01de1aca30e7f793da0a0b5bf2740cb7a - tools/nolibc: rename the internal macros used in syscall()

Sun, 05 Apr 2026 11:06:23 +0200

tools/nolibc: rename the internal macros used in syscall()These macros are the internal implementation of syscall().They can not be used by users. Align them with the standard namingscheme for internal symbols.The current name also prevents the addition of an application-usable_syscall() symbol.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-1-e5b12bc63211@weissschuh.net List of files: /linux/tools/include/nolibc/sys/syscall.h

55f1d6a9d6780e779e882a4d2d1b3db311835798 - tools/nolibc: rename my_syscallX() to __nolibc_syscallX()

Mon, 23 Feb 2026 22:40:14 +0100

tools/nolibc: rename my_syscallX() to __nolibc_syscallX()The naming convention of the my_syscallX() macros is a bit unfortunate.They may conflict with application code and the name is very generic.Switch to __nolibc_syscallX(). The leading underscores place the symbolsin the implementation-defined namespace, avoiding conflicting names.It is also clearer that these are non-standard extensions from nolibc.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://patch.msgid.link/20260223-nolibc-namespacing-v1-1-52574ffebb2c@weissschuh.net List of files: /linux/tools/include/nolibc/sys/syscall.h

3785289f97e2118b157332ffaae9fd2ec71237c8 - tools/nolibc: include nolibc.h early from all header files

Thu, 24 Apr 2025 13:48:12 +0200

tools/nolibc: include nolibc.h early from all header filesInclusion of any nolibc header file should also bring all other headers.On the other hand it should also be possible to include any nolibc headerfilesin any order.Currently this is implemented by including the catch-all nolibc.h after theheaders own definitions.This is problematic if one nolibc header depends on another one.The first header has to include the other one before defining any symbols.That in turn will include the rest of nolibc while the current header hasnot defined anything yet. If any other part of nolibc depends ondefinitions from the current header, errors are encountered.This is already the case today. Effectively nolibc can only be included inthe order of nolibc.h.Restructure the way "nolibc.h" is included.Move it to the beginning of the header files and before the include guards.Now any header will behave exactly like "nolibc.h" while the includeguards prevent any duplicate definitions.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250424-nolibc-header-check-v1-2-011576b6ed6f@linutronix.de List of files: /linux/tools/include/nolibc/sys/syscall.h

0fd55773f47124ee27a1d201bb07649a056c58cc - tools/nolibc: move syscall() to sys/syscall.h

Wed, 16 Apr 2025 14:06:22 +0200

tools/nolibc: move syscall() to sys/syscall.hThis is the location regular userspace expects the definition.Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250416-nolibc-split-sys-v1-7-a069a3f1d145@linutronix.deSigned-off-by: Thomas Weißschuh List of files: /linux/tools/include/nolibc/sys/syscall.h