Messages in this thread Patch in this message | | | Date | Tue, 17 Apr 2018 17:41:28 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH v2] tracing/x86: Update syscall trace events to handle new x86 syscall func names |
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On Tue, 17 Apr 2018 15:13:04 -0300 Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> Em Tue, Apr 17, 2018 at 03:04:30PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Tue, Apr 17, 2018 at 07:22:36PM +0200, Dominik Brodowski escreveu: > > > > Added back original compare to not miss 32bit kernel syscalls > > > > > > s/32bit/32bit and 0-parameter syscalls. > > > > So this should have covered 0-parameter syscalls, ok, I'm double > > checking that the last patch is the one I have running... Because > > 0-parameter syscalls are not working for me, i.e. no > > syscalls:sys_enter_getppid, for instance. > > Yeah, failing: > > [root@jouet ~]# strace -e openat -e file perf test -F -v "mmap interface" |& grep syscalls > openat(AT_FDCWD, "/sys/kernel/debug/tracing/events/syscalls/sys_enter_getsid/format", O_RDONLY) = 3 > openat(AT_FDCWD, "/sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid/format", O_RDONLY) = -1 ENOENT (No such file or directory) > [root@jouet ~]# > > [root@jouet ~]# ls -la /sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid/format > ls: cannot access '/sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid/format': No such file or directory > [root@jouet ~]# > > With: > > +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME > +static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) > +{ > + /* > + * Compare the symbol name with the system call name. Skip the > + * "__x64_sys" prefix. > + */ > + return !strcmp(sym + 9, name + 3) || !strcmp(sym + 3, name + 3); > +} > > in place.
It doesn't have to do with the number of parameters, not everything has "__x64" on it.
Try this patch:
-- Steve
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index 09ad88572746..15582648887f 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -31,6 +31,19 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) return addr; } +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME +static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) +{ + /* + * Compare the symbol name with the system call name. Skip the + * "__x64_sys", "__ia32_sys" or simple "sys" prefix. + */ + return !strcmp(sym + 3, name + 3) || + (!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) || + (!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3)); + +} + #ifdef CONFIG_DYNAMIC_FTRACE struct dyn_arch_ftrace {
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