[PATCH v4 22/22] klp-build: Add arm64 syscall patching macro
Josh Poimboeuf <[email protected]>
| Newsgroups | org.kernel.vger.live-patching,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <56e974b384ffbb3f8b424e7c69da3f702f87f2f8.1786230311.git.jpoimboe@kernel.org> |
Add arm64 support for KLP_SYSCALL_DEFINEx(), mirroring the arm64 __SYSCALL_DEFINEx() pattern from arch/arm64/include/asm/syscall_wrapper.h. Signed-off-by: Josh Poimboeuf <[email protected]> --- include/linux/livepatch_helpers.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/livepatch_helpers.h b/include/linux/livepatch_helpers.h index 99d68d0773fa8..fe02c7b2f769e 100644 --- a/include/linux/livepatch_helpers.h +++ b/include/linux/livepatch_helpers.h @@ -72,6 +72,26 @@ } \ static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) +#elif defined(CONFIG_ARM64) + +#define __KLP_SYSCALL_DEFINEx(x, name, ...) \ + static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ + static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ + asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \ + ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \ + asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \ + { \ + return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));\ + } \ + static long __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; \ + } \ + static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) + #endif #endif /* _LINUX_LIVEPATCH_HELPERS_H */ -- 2.54.0