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-rw-r--r--include/linux/syscalls.h131
1 files changed, 129 insertions, 2 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 80de7003d8c2..a8e37821cc60 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -64,6 +64,7 @@ struct perf_counter_attr;
64#include <linux/sem.h> 64#include <linux/sem.h>
65#include <asm/siginfo.h> 65#include <asm/siginfo.h>
66#include <asm/signal.h> 66#include <asm/signal.h>
67#include <linux/unistd.h>
67#include <linux/quota.h> 68#include <linux/quota.h>
68#include <linux/key.h> 69#include <linux/key.h>
69#include <trace/syscall.h> 70#include <trace/syscall.h>
@@ -97,6 +98,53 @@ struct perf_counter_attr;
97#define __SC_TEST5(t5, a5, ...) __SC_TEST(t5); __SC_TEST4(__VA_ARGS__) 98#define __SC_TEST5(t5, a5, ...) __SC_TEST(t5); __SC_TEST4(__VA_ARGS__)
98#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__) 99#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__)
99 100
101#ifdef CONFIG_EVENT_PROFILE
102#define TRACE_SYS_ENTER_PROFILE(sname) \
103static int prof_sysenter_enable_##sname(struct ftrace_event_call *event_call) \
104{ \
105 int ret = 0; \
106 if (!atomic_inc_return(&event_enter_##sname.profile_count)) \
107 ret = reg_prof_syscall_enter("sys"#sname); \
108 return ret; \
109} \
110 \
111static void prof_sysenter_disable_##sname(struct ftrace_event_call *event_call)\
112{ \
113 if (atomic_add_negative(-1, &event_enter_##sname.profile_count)) \
114 unreg_prof_syscall_enter("sys"#sname); \
115}
116
117#define TRACE_SYS_EXIT_PROFILE(sname) \
118static int prof_sysexit_enable_##sname(struct ftrace_event_call *event_call) \
119{ \
120 int ret = 0; \
121 if (!atomic_inc_return(&event_exit_##sname.profile_count)) \
122 ret = reg_prof_syscall_exit("sys"#sname); \
123 return ret; \
124} \
125 \
126static void prof_sysexit_disable_##sname(struct ftrace_event_call *event_call) \
127{ \
128 if (atomic_add_negative(-1, &event_exit_##sname.profile_count)) \
129 unreg_prof_syscall_exit("sys"#sname); \
130}
131
132#define TRACE_SYS_ENTER_PROFILE_INIT(sname) \
133 .profile_count = ATOMIC_INIT(-1), \
134 .profile_enable = prof_sysenter_enable_##sname, \
135 .profile_disable = prof_sysenter_disable_##sname,
136
137#define TRACE_SYS_EXIT_PROFILE_INIT(sname) \
138 .profile_count = ATOMIC_INIT(-1), \
139 .profile_enable = prof_sysexit_enable_##sname, \
140 .profile_disable = prof_sysexit_disable_##sname,
141#else
142#define TRACE_SYS_ENTER_PROFILE(sname)
143#define TRACE_SYS_ENTER_PROFILE_INIT(sname)
144#define TRACE_SYS_EXIT_PROFILE(sname)
145#define TRACE_SYS_EXIT_PROFILE_INIT(sname)
146#endif
147
100#ifdef CONFIG_FTRACE_SYSCALLS 148#ifdef CONFIG_FTRACE_SYSCALLS
101#define __SC_STR_ADECL1(t, a) #a 149#define __SC_STR_ADECL1(t, a) #a
102#define __SC_STR_ADECL2(t, a, ...) #a, __SC_STR_ADECL1(__VA_ARGS__) 150#define __SC_STR_ADECL2(t, a, ...) #a, __SC_STR_ADECL1(__VA_ARGS__)
@@ -112,7 +160,81 @@ struct perf_counter_attr;
112#define __SC_STR_TDECL5(t, a, ...) #t, __SC_STR_TDECL4(__VA_ARGS__) 160#define __SC_STR_TDECL5(t, a, ...) #t, __SC_STR_TDECL4(__VA_ARGS__)
113#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__) 161#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
114 162
163#define SYSCALL_TRACE_ENTER_EVENT(sname) \
164 static struct ftrace_event_call event_enter_##sname; \
165 struct trace_event enter_syscall_print_##sname = { \
166 .trace = print_syscall_enter, \
167 }; \
168 static int init_enter_##sname(void) \
169 { \
170 int num, id; \
171 num = syscall_name_to_nr("sys"#sname); \
172 if (num < 0) \
173 return -ENOSYS; \
174 id = register_ftrace_event(&enter_syscall_print_##sname);\
175 if (!id) \
176 return -ENODEV; \
177 event_enter_##sname.id = id; \
178 set_syscall_enter_id(num, id); \
179 INIT_LIST_HEAD(&event_enter_##sname.fields); \
180 return 0; \
181 } \
182 TRACE_SYS_ENTER_PROFILE(sname); \
183 static struct ftrace_event_call __used \
184 __attribute__((__aligned__(4))) \
185 __attribute__((section("_ftrace_events"))) \
186 event_enter_##sname = { \
187 .name = "sys_enter"#sname, \
188 .system = "syscalls", \
189 .event = &event_syscall_enter, \
190 .raw_init = init_enter_##sname, \
191 .show_format = syscall_enter_format, \
192 .define_fields = syscall_enter_define_fields, \
193 .regfunc = reg_event_syscall_enter, \
194 .unregfunc = unreg_event_syscall_enter, \
195 .data = "sys"#sname, \
196 TRACE_SYS_ENTER_PROFILE_INIT(sname) \
197 }
198
199#define SYSCALL_TRACE_EXIT_EVENT(sname) \
200 static struct ftrace_event_call event_exit_##sname; \
201 struct trace_event exit_syscall_print_##sname = { \
202 .trace = print_syscall_exit, \
203 }; \
204 static int init_exit_##sname(void) \
205 { \
206 int num, id; \
207 num = syscall_name_to_nr("sys"#sname); \
208 if (num < 0) \
209 return -ENOSYS; \
210 id = register_ftrace_event(&exit_syscall_print_##sname);\
211 if (!id) \
212 return -ENODEV; \
213 event_exit_##sname.id = id; \
214 set_syscall_exit_id(num, id); \
215 INIT_LIST_HEAD(&event_exit_##sname.fields); \
216 return 0; \
217 } \
218 TRACE_SYS_EXIT_PROFILE(sname); \
219 static struct ftrace_event_call __used \
220 __attribute__((__aligned__(4))) \
221 __attribute__((section("_ftrace_events"))) \
222 event_exit_##sname = { \
223 .name = "sys_exit"#sname, \
224 .system = "syscalls", \
225 .event = &event_syscall_exit, \
226 .raw_init = init_exit_##sname, \
227 .show_format = syscall_exit_format, \
228 .define_fields = syscall_exit_define_fields, \
229 .regfunc = reg_event_syscall_exit, \
230 .unregfunc = unreg_event_syscall_exit, \
231 .data = "sys"#sname, \
232 TRACE_SYS_EXIT_PROFILE_INIT(sname) \
233 }
234
115#define SYSCALL_METADATA(sname, nb) \ 235#define SYSCALL_METADATA(sname, nb) \
236 SYSCALL_TRACE_ENTER_EVENT(sname); \
237 SYSCALL_TRACE_EXIT_EVENT(sname); \
116 static const struct syscall_metadata __used \ 238 static const struct syscall_metadata __used \
117 __attribute__((__aligned__(4))) \ 239 __attribute__((__aligned__(4))) \
118 __attribute__((section("__syscalls_metadata"))) \ 240 __attribute__((section("__syscalls_metadata"))) \
@@ -121,18 +243,23 @@ struct perf_counter_attr;
121 .nb_args = nb, \ 243 .nb_args = nb, \
122 .types = types_##sname, \ 244 .types = types_##sname, \
123 .args = args_##sname, \ 245 .args = args_##sname, \
124 } 246 .enter_event = &event_enter_##sname, \
247 .exit_event = &event_exit_##sname, \
248 };
125 249
126#define SYSCALL_DEFINE0(sname) \ 250#define SYSCALL_DEFINE0(sname) \
251 SYSCALL_TRACE_ENTER_EVENT(_##sname); \
252 SYSCALL_TRACE_EXIT_EVENT(_##sname); \
127 static const struct syscall_metadata __used \ 253 static const struct syscall_metadata __used \
128 __attribute__((__aligned__(4))) \ 254 __attribute__((__aligned__(4))) \
129 __attribute__((section("__syscalls_metadata"))) \ 255 __attribute__((section("__syscalls_metadata"))) \
130 __syscall_meta_##sname = { \ 256 __syscall_meta_##sname = { \
131 .name = "sys_"#sname, \ 257 .name = "sys_"#sname, \
132 .nb_args = 0, \ 258 .nb_args = 0, \
259 .enter_event = &event_enter__##sname, \
260 .exit_event = &event_exit__##sname, \
133 }; \ 261 }; \
134 asmlinkage long sys_##sname(void) 262 asmlinkage long sys_##sname(void)
135
136#else 263#else
137#define SYSCALL_DEFINE0(name) asmlinkage long sys_##name(void) 264#define SYSCALL_DEFINE0(name) asmlinkage long sys_##name(void)
138#endif 265#endif
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