[PATCH v4 06/14] klp-build: Add LoongArch syscall patching macro
From: George Guo <hidden>
Date: 2026-07-24 11:43:45
Also in:
lkml, llvm, loongarch
Subsystem:
live patching, the rest · Maintainers:
Josh Poimboeuf, Jiri Kosina, Miroslav Benes, Petr Mladek, Linus Torvalds
From: George Guo <redacted> Add LoongArch support for KLP_SYSCALL_DEFINEx(), mirroring the generic __SYSCALL_DEFINEx() pattern from include/linux/syscalls.h. Co-developed-by: Kexin Liu <redacted> Signed-off-by: Kexin Liu <redacted> Signed-off-by: George Guo <redacted> --- include/linux/livepatch_helpers.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/include/linux/livepatch_helpers.h b/include/linux/livepatch_helpers.h
index 4b647b83865f..d79e692e382d 100644
--- a/include/linux/livepatch_helpers.h
+++ b/include/linux/livepatch_helpers.h@@ -91,6 +91,28 @@ } \ static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) +#elif defined(CONFIG_LOONGARCH) + +#define __KLP_SYSCALL_DEFINEx(x, name, ...) \ + __diag_push(); \ + __diag_ignore(GCC, 8, "-Wattribute-alias", \ + "Type aliasing is used to sanitize syscall arguments");\ + asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ + __attribute__((alias(__stringify(__se_sys##name)))); \ + ALLOW_ERROR_INJECTION(sys##name, ERRNO); \ + static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ + asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ + asmlinkage long __attribute__((optimize("-fno-optimize-sibling-calls")))\ + __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ + { \ + long ret = __klp_do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\ + __MAP(x,__SC_TEST,__VA_ARGS__); \ + __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \ + return ret; \ + } \ + __diag_pop(); \ + static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) + #endif #endif /* _LINUX_LIVEPATCH_HELPERS_H */
--
2.53.0