[PATCH 8/8] klp-build: Add LoongArch syscall patching macro
From: George Guo
Date: Thu Jun 04 2026 - 03:08:56 EST
From: George Guo <guodongtai@xxxxxxxxxx>
Add LoongArch support for KLP_SYSCALL_DEFINEx(), mirroring the generic
__SYSCALL_DEFINEx() pattern from include/linux/syscalls.h.
Co-developed-by: Kexin Liu <liukexin@xxxxxxxxxx>
Signed-off-by: Kexin Liu <liukexin@xxxxxxxxxx>
Signed-off-by: George Guo <guodongtai@xxxxxxxxxx>
---
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..a8aad067177b 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 */
--
2.25.1