[PATCH v3 07/12] klp-build: Add LoongArch syscall patching macro
George Guo <[email protected]> Tue, 7 Jul 2026 15:20:26 +0800
| Newsgroups | org.kernel.vger.live-patching,dev.linux.lists.llvm,dev.linux.lists.loongarch,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
From: George Guo <[email protected]> Add LoongArch support for KLP_SYSCALL_DEFINEx(), mirroring the generic __SYSCALL_DEFINEx() pattern from include/linux/syscalls.h. Co-developed-by: Kexin Liu <[email protected]> Signed-off-by: Kexin Liu <[email protected]> Signed-off-by: George Guo <[email protected]> --- 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