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8ca3246081
linux
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tools
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include
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nolibc
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sys
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syscall.h
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tools/nolibc: move syscall() to sys/syscall.h This is the location regular userspace expects the definition. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250416-nolibc-split-sys-v1-7-a069a3f1d145@linutronix.de Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-04-16 14:06:22 +02:00
tools/nolibc: include nolibc.h early from all header files Inclusion of any nolibc header file should also bring all other headers. On the other hand it should also be possible to include any nolibc header files in any order. Currently this is implemented by including the catch-all nolibc.h after the headers 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 has not defined anything yet. If any other part of nolibc depends on definitions from the current header, errors are encountered. This is already the case today. Effectively nolibc can only be included in the 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 include guards prevent any duplicate definitions. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250424-nolibc-header-check-v1-2-011576b6ed6f@linutronix.de
2025-04-24 13:48:12 +02:00
tools/nolibc: move syscall() to sys/syscall.h This is the location regular userspace expects the definition. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250416-nolibc-split-sys-v1-7-a069a3f1d145@linutronix.de Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-04-16 14:06:22 +02:00
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 naming scheme for internal symbols. The current name also prevents the addition of an application-usable _syscall() symbol. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-1-e5b12bc63211@weissschuh.net
2026-04-05 11:06:23 +02:00
tools/nolibc: move the call to __sysret() into syscall() __sysret() transforms the return value from the kernel into the libc return value convention. There is no reason for it to be called in the middle 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 <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-2-e5b12bc63211@weissschuh.net
2026-04-05 11:06:24 +02:00
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 naming scheme for internal symbols. The current name also prevents the addition of an application-usable _syscall() symbol. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-1-e5b12bc63211@weissschuh.net
2026-04-05 11:06:23 +02:00
tools/nolibc: add the _syscall() macro The standard syscall() function or macro uses the libc return value convention. Errors returned from the kernel as negative values are stored in errno and -1 is returned. Users who want to avoid using errno don't have a way to call raw syscalls and check the returned error. 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 <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260405-nolibc-syscall-v1-3-e5b12bc63211@weissschuh.net
2026-04-05 11:06:25 +02:00
tools/nolibc: move syscall() to sys/syscall.h This is the location regular userspace expects the definition. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250416-nolibc-split-sys-v1-7-a069a3f1d145@linutronix.de Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-04-16 14:06:22 +02:00
