From: Jason Baron <jba...@redhat.com> Create a new "compat_syscalls" subsys for tracing
Signed-off-by: Jason Baron <jba...@redhat.com> Signed-off-by: Ian Munsie <imun...@au1.ibm.com> --- include/linux/syscalls.h | 40 +++++++++++++++++++++------------------- kernel/trace/trace_syscalls.c | 16 ++++++++++++++++ 2 files changed, 37 insertions(+), 19 deletions(-) diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index a7d1114..e115569 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -120,10 +120,12 @@ struct perf_event_attr; extern struct ftrace_event_class event_class_syscall_enter; extern struct ftrace_event_class event_class_syscall_exit; +extern struct ftrace_event_class event_class_compat_syscall_enter; +extern struct ftrace_event_class event_class_compat_syscall_exit; extern struct trace_event_functions enter_syscall_print_funcs; extern struct trace_event_functions exit_syscall_print_funcs; -#define SYSCALL_TRACE_ENTER_EVENT(sname) \ +#define SYSCALL_TRACE_ENTER_EVENT(sname, event_class) \ static struct syscall_metadata __syscall_meta_##sname; \ static struct ftrace_event_call \ __attribute__((__aligned__(4))) event_enter_##sname; \ @@ -132,12 +134,12 @@ extern struct trace_event_functions exit_syscall_print_funcs; __attribute__((section("_ftrace_events"))) \ event_enter_##sname = { \ .name = "enter_"#sname, \ - .class = &event_class_syscall_enter, \ + .class = &event_class_##event_class##_enter,\ .event.funcs = &enter_syscall_print_funcs, \ .data = (void *)&__syscall_meta_##sname,\ } -#define SYSCALL_TRACE_EXIT_EVENT(sname) \ +#define SYSCALL_TRACE_EXIT_EVENT(sname, event_class) \ static struct syscall_metadata __syscall_meta_##sname; \ static struct ftrace_event_call \ __attribute__((__aligned__(4))) event_exit_##sname; \ @@ -146,14 +148,14 @@ extern struct trace_event_functions exit_syscall_print_funcs; __attribute__((section("_ftrace_events"))) \ event_exit_##sname = { \ .name = "exit_"#sname, \ - .class = &event_class_syscall_exit, \ + .class = &event_class_##event_class##_exit,\ .event.funcs = &exit_syscall_print_funcs, \ .data = (void *)&__syscall_meta_##sname,\ } -#define SYSCALL_METADATA(rname, sname, nb) \ - SYSCALL_TRACE_ENTER_EVENT(sname); \ - SYSCALL_TRACE_EXIT_EVENT(sname); \ +#define SYSCALL_METADATA(rname, sname, nb, event_class) \ + SYSCALL_TRACE_ENTER_EVENT(sname, event_class); \ + SYSCALL_TRACE_EXIT_EVENT(sname, event_class); \ static struct syscall_metadata __used \ __attribute__((__aligned__(4))) \ __attribute__((section("__syscalls_metadata"))) \ @@ -174,8 +176,8 @@ extern struct trace_event_functions exit_syscall_print_funcs; }; #define SYSCALL_DEFINE0(sname) \ - SYSCALL_TRACE_ENTER_EVENT(sys_##sname); \ - SYSCALL_TRACE_EXIT_EVENT(sys_##sname); \ + SYSCALL_TRACE_ENTER_EVENT(sys_##sname, syscall); \ + SYSCALL_TRACE_EXIT_EVENT(sys_##sname, syscall); \ static struct syscall_metadata __used \ __attribute__((__aligned__(4))) \ __attribute__((section("__syscalls_metadata"))) \ @@ -221,17 +223,17 @@ extern struct trace_event_functions exit_syscall_print_funcs; #define COMPAT_SYSCALL_DEFINE6(name, ...) COMPAT_SYSCALL_DEFINEx(6, compat_sys_##name, name, __VA_ARGS__) #ifdef CONFIG_FTRACE_SYSCALLS -#define COMPAT_SYSCALL_DEFINEx(x, syscall, sname, ...) \ - static const char *types_compat_sys_##sname[] = { \ - __SC_STR_TDECL##x(__VA_ARGS__) \ - }; \ - static const char *args_compat_sys_##sname[] = { \ - __SC_STR_ADECL##x(__VA_ARGS__) \ - }; \ - SYSCALL_METADATA(syscall, compat_sys_##sname, x); \ +#define COMPAT_SYSCALL_DEFINEx(x, syscall, sname, ...) \ + static const char *types_compat_sys_##sname[] = { \ + __SC_STR_TDECL##x(__VA_ARGS__) \ + }; \ + static const char *args_compat_sys_##sname[] = { \ + __SC_STR_ADECL##x(__VA_ARGS__) \ + }; \ + SYSCALL_METADATA(syscall, compat_sys_##sname, x, compat_syscall);\ asmlinkage long syscall(__SC_DECL##x(__VA_ARGS__)) #else -#define COMPAT_SYSCALL_DEFINEx(x, syscall, sname, ...) \ +#define COMPAT_SYSCALL_DEFINEx(x, syscall, sname, ...) \ asmlinkage long syscall(__SC_DECL##x(__VA_ARGS__)) #endif @@ -259,7 +261,7 @@ extern struct trace_event_functions exit_syscall_print_funcs; static const char *args_sys##sname[] = { \ __SC_STR_ADECL##x(__VA_ARGS__) \ }; \ - SYSCALL_METADATA(sys##sname, sys##sname, x); \ + SYSCALL_METADATA(sys##sname, sys##sname, x, syscall); \ __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) #else #define SYSCALL_DEFINEx(x, sname, ...) \ diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index d910cba..ff6cd7a 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -62,6 +62,22 @@ struct ftrace_event_class event_class_syscall_exit = { .raw_init = init_syscall_trace, }; +struct ftrace_event_class event_class_compat_syscall_enter = { + .system = "compat_syscalls", + .reg = syscall_enter_register, + .define_fields = syscall_enter_define_fields, + .get_fields = syscall_get_enter_fields, + .raw_init = init_syscall_trace, +}; + +struct ftrace_event_class event_class_compat_syscall_exit = { + .system = "compat_syscalls", + .reg = syscall_exit_register, + .define_fields = syscall_exit_define_fields, + .get_fields = syscall_get_exit_fields, + .raw_init = init_syscall_trace, +}; + extern unsigned long __start_syscalls_metadata[]; extern unsigned long __stop_syscalls_metadata[]; -- 1.7.1 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev