Recent commit changed the name prefix of syscalls for x86_64 (check the 'Fixes:' for commit number).
The names switch from "sys_" prefix to ""__x64_sys_", which made the default matching function always fail. Consequently the ftrace syscall __init code could not match any syscall metadata so the "syscall" events vanished. This fix returns them back. Cc: Andy Lutomirski <[email protected]> Cc: Dominik Brodowski <[email protected]> Fixes: d5a00528b58c ("syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*()") Signed-off-by: Jiri Olsa <[email protected]> --- arch/x86/include/asm/ftrace.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index 09ad88572746..7b131ad39ee2 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -67,6 +67,18 @@ static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) return false; } #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ + +#ifdef CONFIG_X86_64 +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 1 +static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) +{ + /* + * Skip the __x64_sys_ prefix and compare the + * syscall name only. + */ + return !strcmp(sym + 9, name + 3); +} +#endif /* CONFIG_X86_64 */ #endif /* !__ASSEMBLY__ && !COMPILE_OFFSETS */ #endif /* _ASM_X86_FTRACE_H */ -- 2.13.6
