Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
2 | * | |
259b6cb3 MD |
3 | * lttng-syscalls.c |
4 | * | |
2faf7d1b | 5 | * LTTng syscall probes. |
259b6cb3 | 6 | * |
886d51a3 | 7 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
259b6cb3 MD |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/slab.h> | |
6333ace3 | 12 | #include <linux/compat.h> |
abc0446a | 13 | #include <linux/err.h> |
80f87dd2 | 14 | #include <linux/bitmap.h> |
7ca580f8 MD |
15 | #include <linux/in.h> |
16 | #include <linux/in6.h> | |
2d2464bd | 17 | #include <linux/seq_file.h> |
d4291869 | 18 | #include <linux/stringify.h> |
082d4946 MD |
19 | #include <linux/file.h> |
20 | #include <linux/anon_inodes.h> | |
259b6cb3 MD |
21 | #include <asm/ptrace.h> |
22 | #include <asm/syscall.h> | |
23 | ||
241ae9a8 MD |
24 | #include <lib/bitfield.h> |
25 | #include <wrapper/tracepoint.h> | |
26 | #include <wrapper/file.h> | |
27 | #include <wrapper/rcu.h> | |
1b7b9c65 | 28 | #include <wrapper/syscall.h> |
241ae9a8 | 29 | #include <lttng-events.h> |
259b6cb3 | 30 | |
6333ace3 | 31 | #ifndef CONFIG_COMPAT |
bfa949bf MD |
32 | # ifndef is_compat_task |
33 | # define is_compat_task() (0) | |
34 | # endif | |
6333ace3 MD |
35 | #endif |
36 | ||
1aa3298b MD |
37 | /* in_compat_syscall appears in kernel 4.6. */ |
38 | #ifndef in_compat_syscall | |
39 | #define in_compat_syscall() is_compat_task() | |
40 | #endif | |
41 | ||
5b7ac358 MD |
42 | enum sc_type { |
43 | SC_TYPE_ENTRY, | |
44 | SC_TYPE_EXIT, | |
45 | SC_TYPE_COMPAT_ENTRY, | |
46 | SC_TYPE_COMPAT_EXIT, | |
47 | }; | |
48 | ||
d4291869 MD |
49 | #define SYSCALL_ENTRY_TOK syscall_entry_ |
50 | #define COMPAT_SYSCALL_ENTRY_TOK compat_syscall_entry_ | |
51 | #define SYSCALL_EXIT_TOK syscall_exit_ | |
52 | #define COMPAT_SYSCALL_EXIT_TOK compat_syscall_exit_ | |
53 | ||
54 | #define SYSCALL_ENTRY_STR __stringify(SYSCALL_ENTRY_TOK) | |
55 | #define COMPAT_SYSCALL_ENTRY_STR __stringify(COMPAT_SYSCALL_ENTRY_TOK) | |
56 | #define SYSCALL_EXIT_STR __stringify(SYSCALL_EXIT_TOK) | |
57 | #define COMPAT_SYSCALL_EXIT_STR __stringify(COMPAT_SYSCALL_EXIT_TOK) | |
5b7ac358 | 58 | |
a93244f8 | 59 | static |
2faf7d1b | 60 | void syscall_entry_probe(void *__data, struct pt_regs *regs, long id); |
5b7ac358 MD |
61 | static |
62 | void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret); | |
259b6cb3 | 63 | |
3a523f5b MD |
64 | /* |
65 | * Forward declarations for old kernels. | |
66 | */ | |
67 | struct mmsghdr; | |
68 | struct rlimit64; | |
69 | struct oldold_utsname; | |
70 | struct old_utsname; | |
71 | struct sel_arg_struct; | |
72 | struct mmap_arg_struct; | |
c0b71117 | 73 | struct file_handle; |
a292e6f1 | 74 | struct user_msghdr; |
3a523f5b | 75 | |
393f0993 MJ |
76 | /* |
77 | * Forward declaration for kernels >= 5.6 | |
78 | */ | |
79 | struct timex; | |
1c846044 MJ |
80 | struct timeval; |
81 | struct itimerval; | |
82 | struct itimerspec; | |
83 | ||
2d042821 | 84 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
1c846044 MJ |
85 | typedef __kernel_old_time_t time_t; |
86 | #endif | |
393f0993 | 87 | |
80f87dd2 MD |
88 | #ifdef IA32_NR_syscalls |
89 | #define NR_compat_syscalls IA32_NR_syscalls | |
90 | #else | |
91 | #define NR_compat_syscalls NR_syscalls | |
92 | #endif | |
93 | ||
259b6cb3 MD |
94 | /* |
95 | * Create LTTng tracepoint probes. | |
96 | */ | |
97 | #define LTTNG_PACKAGE_BUILD | |
98 | #define CREATE_TRACE_POINTS | |
2655f9ad | 99 | #define TP_MODULE_NOINIT |
c075712b | 100 | #define TRACE_INCLUDE_PATH instrumentation/syscalls/headers |
259b6cb3 | 101 | |
a93244f8 MD |
102 | #define PARAMS(args...) args |
103 | ||
5b7ac358 | 104 | /* Handle unknown syscalls */ |
72a52753 | 105 | #undef TRACE_SYSTEM |
5b7ac358 | 106 | #define TRACE_SYSTEM syscalls_unknown |
241ae9a8 | 107 | #include <instrumentation/syscalls/headers/syscalls_unknown.h> |
5b7ac358 MD |
108 | #undef TRACE_SYSTEM |
109 | ||
fc4f7161 MD |
110 | #define SC_ENTER |
111 | ||
fc4f7161 MD |
112 | #undef sc_exit |
113 | #define sc_exit(...) | |
b75d00c4 MD |
114 | #undef sc_in |
115 | #define sc_in(...) __VA_ARGS__ | |
116 | #undef sc_out | |
117 | #define sc_out(...) | |
118 | #undef sc_inout | |
119 | #define sc_inout(...) __VA_ARGS__ | |
5b7ac358 MD |
120 | |
121 | /* Hijack probe callback for system call enter */ | |
a93244f8 | 122 | #undef TP_PROBE_CB |
259b6cb3 | 123 | #define TP_PROBE_CB(_template) &syscall_entry_probe |
57ede728 | 124 | #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ |
d4291869 | 125 | LTTNG_TRACEPOINT_EVENT(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ |
57ede728 | 126 | PARAMS(_fields)) |
265822ae | 127 | #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
d4291869 | 128 | LTTNG_TRACEPOINT_EVENT_CODE(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ |
265822ae MD |
129 | PARAMS(_locvar), PARAMS(_code_pre), \ |
130 | PARAMS(_fields), PARAMS(_code_post)) | |
57ede728 MD |
131 | #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
132 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_fields)) | |
cb3ef14c | 133 | #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
d4291869 | 134 | LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_entry_##_template, syscall_entry_##_name) |
141ddf28 MD |
135 | /* Enumerations only defined at first inclusion. */ |
136 | #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) \ | |
137 | LTTNG_TRACEPOINT_ENUM(_name, PARAMS(_values)) | |
a93244f8 | 138 | #undef TRACE_SYSTEM |
d4291869 | 139 | #define TRACE_SYSTEM syscall_entry_integers |
5b7ac358 | 140 | #define TRACE_INCLUDE_FILE syscalls_integers |
241ae9a8 | 141 | #include <instrumentation/syscalls/headers/syscalls_integers.h> |
5b7ac358 | 142 | #undef TRACE_INCLUDE_FILE |
a93244f8 | 143 | #undef TRACE_SYSTEM |
d4291869 | 144 | #define TRACE_SYSTEM syscall_entry_pointers |
5b7ac358 | 145 | #define TRACE_INCLUDE_FILE syscalls_pointers |
241ae9a8 | 146 | #include <instrumentation/syscalls/headers/syscalls_pointers.h> |
5b7ac358 | 147 | #undef TRACE_INCLUDE_FILE |
a93244f8 | 148 | #undef TRACE_SYSTEM |
141ddf28 | 149 | #undef SC_LTTNG_TRACEPOINT_ENUM |
cb3ef14c MD |
150 | #undef SC_LTTNG_TRACEPOINT_EVENT_CODE |
151 | #undef SC_LTTNG_TRACEPOINT_EVENT | |
152 | #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS | |
153 | #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS | |
5b7ac358 | 154 | #undef TP_PROBE_CB |
3bc29f0a MD |
155 | #undef _TRACE_SYSCALLS_INTEGERS_H |
156 | #undef _TRACE_SYSCALLS_POINTERS_H | |
5b7ac358 MD |
157 | |
158 | /* Hijack probe callback for compat system call enter */ | |
a93244f8 | 159 | #define TP_PROBE_CB(_template) &syscall_entry_probe |
771af27e | 160 | #define LTTNG_SC_COMPAT |
57ede728 | 161 | #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ |
d4291869 | 162 | LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ |
57ede728 | 163 | PARAMS(_fields)) |
265822ae | 164 | #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
d4291869 | 165 | LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ |
265822ae | 166 | PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) |
57ede728 MD |
167 | #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
168 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_entry_##_name, PARAMS(_fields)) | |
cb3ef14c | 169 | #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
d4291869 MD |
170 | LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_entry_##_template, \ |
171 | compat_syscall_entry_##_name) | |
141ddf28 MD |
172 | /* Enumerations only defined at inital inclusion (not here). */ |
173 | #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) | |
d4291869 | 174 | #define TRACE_SYSTEM compat_syscall_entry_integers |
5b7ac358 | 175 | #define TRACE_INCLUDE_FILE compat_syscalls_integers |
241ae9a8 | 176 | #include <instrumentation/syscalls/headers/compat_syscalls_integers.h> |
5b7ac358 MD |
177 | #undef TRACE_INCLUDE_FILE |
178 | #undef TRACE_SYSTEM | |
d4291869 | 179 | #define TRACE_SYSTEM compat_syscall_entry_pointers |
5b7ac358 | 180 | #define TRACE_INCLUDE_FILE compat_syscalls_pointers |
241ae9a8 | 181 | #include <instrumentation/syscalls/headers/compat_syscalls_pointers.h> |
5b7ac358 MD |
182 | #undef TRACE_INCLUDE_FILE |
183 | #undef TRACE_SYSTEM | |
141ddf28 | 184 | #undef SC_LTTNG_TRACEPOINT_ENUM |
cb3ef14c MD |
185 | #undef SC_LTTNG_TRACEPOINT_EVENT_CODE |
186 | #undef SC_LTTNG_TRACEPOINT_EVENT | |
187 | #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS | |
188 | #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS | |
5b7ac358 | 189 | #undef TP_PROBE_CB |
3bc29f0a MD |
190 | #undef _TRACE_SYSCALLS_INTEGERS_H |
191 | #undef _TRACE_SYSCALLS_POINTERS_H | |
771af27e | 192 | #undef LTTNG_SC_COMPAT |
5b7ac358 | 193 | |
fc4f7161 MD |
194 | #undef SC_ENTER |
195 | ||
196 | #define SC_EXIT | |
197 | ||
fc4f7161 MD |
198 | #undef sc_exit |
199 | #define sc_exit(...) __VA_ARGS__ | |
b75d00c4 MD |
200 | #undef sc_in |
201 | #define sc_in(...) | |
202 | #undef sc_out | |
203 | #define sc_out(...) __VA_ARGS__ | |
204 | #undef sc_inout | |
205 | #define sc_inout(...) __VA_ARGS__ | |
5b7ac358 MD |
206 | |
207 | /* Hijack probe callback for system call exit */ | |
208 | #define TP_PROBE_CB(_template) &syscall_exit_probe | |
57ede728 | 209 | #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ |
3bc29f0a | 210 | LTTNG_TRACEPOINT_EVENT(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
57ede728 | 211 | PARAMS(_fields)) |
265822ae | 212 | #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
3bc29f0a | 213 | LTTNG_TRACEPOINT_EVENT_CODE(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
265822ae | 214 | PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) |
57ede728 MD |
215 | #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
216 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_exit_##_name, PARAMS(_fields)) | |
cb3ef14c MD |
217 | #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
218 | LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_exit_##_template, \ | |
5b7ac358 | 219 | syscall_exit_##_name) |
141ddf28 MD |
220 | /* Enumerations only defined at inital inclusion (not here). */ |
221 | #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) | |
5b7ac358 MD |
222 | #define TRACE_SYSTEM syscall_exit_integers |
223 | #define TRACE_INCLUDE_FILE syscalls_integers | |
241ae9a8 | 224 | #include <instrumentation/syscalls/headers/syscalls_integers.h> |
5b7ac358 MD |
225 | #undef TRACE_INCLUDE_FILE |
226 | #undef TRACE_SYSTEM | |
227 | #define TRACE_SYSTEM syscall_exit_pointers | |
228 | #define TRACE_INCLUDE_FILE syscalls_pointers | |
241ae9a8 | 229 | #include <instrumentation/syscalls/headers/syscalls_pointers.h> |
5b7ac358 MD |
230 | #undef TRACE_INCLUDE_FILE |
231 | #undef TRACE_SYSTEM | |
141ddf28 | 232 | #undef SC_LTTNG_TRACEPOINT_ENUM |
cb3ef14c MD |
233 | #undef SC_LTTNG_TRACEPOINT_EVENT_CODE |
234 | #undef SC_LTTNG_TRACEPOINT_EVENT | |
235 | #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS | |
236 | #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS | |
5b7ac358 | 237 | #undef TP_PROBE_CB |
3bc29f0a MD |
238 | #undef _TRACE_SYSCALLS_INTEGERS_H |
239 | #undef _TRACE_SYSCALLS_POINTERS_H | |
5b7ac358 MD |
240 | |
241 | ||
242 | /* Hijack probe callback for compat system call exit */ | |
243 | #define TP_PROBE_CB(_template) &syscall_exit_probe | |
771af27e | 244 | #define LTTNG_SC_COMPAT |
57ede728 | 245 | #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ |
3bc29f0a | 246 | LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
57ede728 | 247 | PARAMS(_fields)) |
265822ae | 248 | #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
3bc29f0a | 249 | LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
265822ae | 250 | PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) |
57ede728 MD |
251 | #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
252 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_exit_##_name, PARAMS(_fields)) | |
cb3ef14c | 253 | #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
3bc29f0a | 254 | LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_exit_##_template, \ |
5b7ac358 | 255 | compat_syscall_exit_##_name) |
141ddf28 MD |
256 | /* Enumerations only defined at inital inclusion (not here). */ |
257 | #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) | |
5b7ac358 MD |
258 | #define TRACE_SYSTEM compat_syscall_exit_integers |
259 | #define TRACE_INCLUDE_FILE compat_syscalls_integers | |
241ae9a8 | 260 | #include <instrumentation/syscalls/headers/compat_syscalls_integers.h> |
5b7ac358 | 261 | #undef TRACE_INCLUDE_FILE |
a93244f8 | 262 | #undef TRACE_SYSTEM |
5b7ac358 MD |
263 | #define TRACE_SYSTEM compat_syscall_exit_pointers |
264 | #define TRACE_INCLUDE_FILE compat_syscalls_pointers | |
241ae9a8 | 265 | #include <instrumentation/syscalls/headers/compat_syscalls_pointers.h> |
5b7ac358 | 266 | #undef TRACE_INCLUDE_FILE |
a93244f8 | 267 | #undef TRACE_SYSTEM |
141ddf28 | 268 | #undef SC_LTTNG_TRACEPOINT_ENUM |
cb3ef14c MD |
269 | #undef SC_LTTNG_TRACEPOINT_EVENT_CODE |
270 | #undef SC_LTTNG_TRACEPOINT_EVENT | |
271 | #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS | |
272 | #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS | |
a93244f8 | 273 | #undef TP_PROBE_CB |
3bc29f0a MD |
274 | #undef _TRACE_SYSCALLS_INTEGERS_H |
275 | #undef _TRACE_SYSCALLS_POINTERS_H | |
771af27e | 276 | #undef LTTNG_SC_COMPAT |
5b7ac358 | 277 | |
fc4f7161 | 278 | #undef SC_EXIT |
259b6cb3 | 279 | |
2655f9ad | 280 | #undef TP_MODULE_NOINIT |
259b6cb3 MD |
281 | #undef LTTNG_PACKAGE_BUILD |
282 | #undef CREATE_TRACE_POINTS | |
283 | ||
a93244f8 MD |
284 | struct trace_syscall_entry { |
285 | void *func; | |
286 | const struct lttng_event_desc *desc; | |
287 | const struct lttng_event_field *fields; | |
288 | unsigned int nrargs; | |
289 | }; | |
290 | ||
291 | #define CREATE_SYSCALL_TABLE | |
292 | ||
fc4f7161 MD |
293 | #define SC_ENTER |
294 | ||
295 | #undef sc_exit | |
296 | #define sc_exit(...) | |
297 | ||
259b6cb3 | 298 | #undef TRACE_SYSCALL_TABLE |
f7bdf4db | 299 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ |
259b6cb3 | 300 | [ _nr ] = { \ |
d4291869 | 301 | .func = __event_probe__syscall_entry_##_template, \ |
259b6cb3 | 302 | .nrargs = (_nrargs), \ |
d4291869 MD |
303 | .fields = __event_fields___syscall_entry_##_template, \ |
304 | .desc = &__event_desc___syscall_entry_##_name, \ | |
259b6cb3 MD |
305 | }, |
306 | ||
5b7ac358 | 307 | /* Syscall enter tracing table */ |
49c50022 | 308 | static const struct trace_syscall_entry sc_table[] = { |
241ae9a8 MD |
309 | #include <instrumentation/syscalls/headers/syscalls_integers.h> |
310 | #include <instrumentation/syscalls/headers/syscalls_pointers.h> | |
259b6cb3 MD |
311 | }; |
312 | ||
a93244f8 MD |
313 | #undef TRACE_SYSCALL_TABLE |
314 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ | |
315 | [ _nr ] = { \ | |
d4291869 | 316 | .func = __event_probe__compat_syscall_entry_##_template, \ |
a93244f8 | 317 | .nrargs = (_nrargs), \ |
d4291869 MD |
318 | .fields = __event_fields___compat_syscall_entry_##_template, \ |
319 | .desc = &__event_desc___compat_syscall_entry_##_name, \ | |
a93244f8 MD |
320 | }, |
321 | ||
5b7ac358 | 322 | /* Compat syscall enter table */ |
a93244f8 | 323 | const struct trace_syscall_entry compat_sc_table[] = { |
241ae9a8 MD |
324 | #include <instrumentation/syscalls/headers/compat_syscalls_integers.h> |
325 | #include <instrumentation/syscalls/headers/compat_syscalls_pointers.h> | |
a93244f8 | 326 | }; |
259b6cb3 | 327 | |
fc4f7161 MD |
328 | #undef SC_ENTER |
329 | ||
330 | #define SC_EXIT | |
331 | ||
332 | #undef sc_exit | |
333 | #define sc_exit(...) __VA_ARGS__ | |
334 | ||
5b7ac358 MD |
335 | #undef TRACE_SYSCALL_TABLE |
336 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ | |
337 | [ _nr ] = { \ | |
338 | .func = __event_probe__syscall_exit_##_template, \ | |
339 | .nrargs = (_nrargs), \ | |
340 | .fields = __event_fields___syscall_exit_##_template, \ | |
341 | .desc = &__event_desc___syscall_exit_##_name, \ | |
342 | }, | |
343 | ||
344 | /* Syscall exit table */ | |
345 | static const struct trace_syscall_entry sc_exit_table[] = { | |
241ae9a8 MD |
346 | #include <instrumentation/syscalls/headers/syscalls_integers.h> |
347 | #include <instrumentation/syscalls/headers/syscalls_pointers.h> | |
5b7ac358 MD |
348 | }; |
349 | ||
350 | #undef TRACE_SYSCALL_TABLE | |
351 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ | |
352 | [ _nr ] = { \ | |
353 | .func = __event_probe__compat_syscall_exit_##_template, \ | |
354 | .nrargs = (_nrargs), \ | |
355 | .fields = __event_fields___compat_syscall_exit_##_template, \ | |
356 | .desc = &__event_desc___compat_syscall_exit_##_name, \ | |
357 | }, | |
358 | ||
359 | /* Compat syscall exit table */ | |
360 | const struct trace_syscall_entry compat_sc_exit_table[] = { | |
241ae9a8 MD |
361 | #include <instrumentation/syscalls/headers/compat_syscalls_integers.h> |
362 | #include <instrumentation/syscalls/headers/compat_syscalls_pointers.h> | |
5b7ac358 MD |
363 | }; |
364 | ||
fc4f7161 MD |
365 | #undef SC_EXIT |
366 | ||
a93244f8 | 367 | #undef CREATE_SYSCALL_TABLE |
2faf7d1b | 368 | |
80f87dd2 | 369 | struct lttng_syscall_filter { |
ad594e3a MD |
370 | DECLARE_BITMAP(sc_entry, NR_syscalls); |
371 | DECLARE_BITMAP(sc_exit, NR_syscalls); | |
372 | DECLARE_BITMAP(sc_compat_entry, NR_compat_syscalls); | |
373 | DECLARE_BITMAP(sc_compat_exit, NR_compat_syscalls); | |
80f87dd2 MD |
374 | }; |
375 | ||
a90917c3 | 376 | static void syscall_entry_unknown(struct lttng_event *event, |
f405cfce MD |
377 | struct pt_regs *regs, unsigned int id) |
378 | { | |
1b7b9c65 | 379 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
f405cfce | 380 | |
1b7b9c65 | 381 | lttng_syscall_get_arguments(current, regs, args); |
1aa3298b | 382 | if (unlikely(in_compat_syscall())) |
d4291869 | 383 | __event_probe__compat_syscall_entry_unknown(event, id, args); |
a93244f8 | 384 | else |
d4291869 | 385 | __event_probe__syscall_entry_unknown(event, id, args); |
f405cfce MD |
386 | } |
387 | ||
2faf7d1b | 388 | void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) |
259b6cb3 | 389 | { |
a90917c3 MD |
390 | struct lttng_channel *chan = __data; |
391 | struct lttng_event *event, *unknown_event; | |
49c50022 MD |
392 | const struct trace_syscall_entry *table, *entry; |
393 | size_t table_len; | |
259b6cb3 | 394 | |
f75983c2 MD |
395 | #ifdef CONFIG_X86_X32_ABI |
396 | if (in_x32_syscall()) { | |
397 | /* x32 system calls are not supported. */ | |
398 | return; | |
399 | } | |
400 | #endif | |
1aa3298b | 401 | if (unlikely(in_compat_syscall())) { |
ad594e3a MD |
402 | struct lttng_syscall_filter *filter = chan->sc_filter; |
403 | ||
404 | if (id < 0 || id >= NR_compat_syscalls | |
405 | || (!READ_ONCE(chan->syscall_all) && !test_bit(id, filter->sc_compat_entry))) { | |
406 | /* System call filtered out. */ | |
407 | return; | |
80f87dd2 | 408 | } |
49c50022 | 409 | table = compat_sc_table; |
a93244f8 | 410 | table_len = ARRAY_SIZE(compat_sc_table); |
49c50022 MD |
411 | unknown_event = chan->sc_compat_unknown; |
412 | } else { | |
ad594e3a MD |
413 | struct lttng_syscall_filter *filter = chan->sc_filter; |
414 | ||
415 | if (id < 0 || id >= NR_syscalls | |
416 | || (!READ_ONCE(chan->syscall_all) && !test_bit(id, filter->sc_entry))) { | |
417 | /* System call filtered out. */ | |
418 | return; | |
80f87dd2 | 419 | } |
49c50022 MD |
420 | table = sc_table; |
421 | table_len = ARRAY_SIZE(sc_table); | |
422 | unknown_event = chan->sc_unknown; | |
b76dc1a0 | 423 | } |
74f7b56a | 424 | if (unlikely(id < 0 || id >= table_len)) { |
49c50022 | 425 | syscall_entry_unknown(unknown_event, regs, id); |
259b6cb3 | 426 | return; |
f405cfce | 427 | } |
1aa3298b | 428 | if (unlikely(in_compat_syscall())) |
49c50022 MD |
429 | event = chan->compat_sc_table[id]; |
430 | else | |
431 | event = chan->sc_table[id]; | |
f405cfce | 432 | if (unlikely(!event)) { |
49c50022 | 433 | syscall_entry_unknown(unknown_event, regs, id); |
f405cfce MD |
434 | return; |
435 | } | |
49c50022 | 436 | entry = &table[id]; |
f405cfce | 437 | WARN_ON_ONCE(!entry); |
259b6cb3 MD |
438 | |
439 | switch (entry->nrargs) { | |
440 | case 0: | |
441 | { | |
442 | void (*fptr)(void *__data) = entry->func; | |
443 | ||
444 | fptr(event); | |
445 | break; | |
446 | } | |
447 | case 1: | |
448 | { | |
449 | void (*fptr)(void *__data, unsigned long arg0) = entry->func; | |
1b7b9c65 | 450 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 451 | |
1b7b9c65 | 452 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
453 | fptr(event, args[0]); |
454 | break; | |
455 | } | |
456 | case 2: | |
457 | { | |
458 | void (*fptr)(void *__data, | |
459 | unsigned long arg0, | |
460 | unsigned long arg1) = entry->func; | |
1b7b9c65 | 461 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 462 | |
1b7b9c65 | 463 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
464 | fptr(event, args[0], args[1]); |
465 | break; | |
466 | } | |
467 | case 3: | |
468 | { | |
469 | void (*fptr)(void *__data, | |
470 | unsigned long arg0, | |
471 | unsigned long arg1, | |
472 | unsigned long arg2) = entry->func; | |
1b7b9c65 | 473 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 474 | |
1b7b9c65 | 475 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
476 | fptr(event, args[0], args[1], args[2]); |
477 | break; | |
478 | } | |
479 | case 4: | |
480 | { | |
481 | void (*fptr)(void *__data, | |
482 | unsigned long arg0, | |
483 | unsigned long arg1, | |
484 | unsigned long arg2, | |
485 | unsigned long arg3) = entry->func; | |
1b7b9c65 | 486 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 487 | |
1b7b9c65 | 488 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
489 | fptr(event, args[0], args[1], args[2], args[3]); |
490 | break; | |
491 | } | |
492 | case 5: | |
493 | { | |
494 | void (*fptr)(void *__data, | |
495 | unsigned long arg0, | |
496 | unsigned long arg1, | |
497 | unsigned long arg2, | |
498 | unsigned long arg3, | |
499 | unsigned long arg4) = entry->func; | |
1b7b9c65 | 500 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 501 | |
1b7b9c65 | 502 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
503 | fptr(event, args[0], args[1], args[2], args[3], args[4]); |
504 | break; | |
505 | } | |
506 | case 6: | |
507 | { | |
508 | void (*fptr)(void *__data, | |
509 | unsigned long arg0, | |
510 | unsigned long arg1, | |
511 | unsigned long arg2, | |
512 | unsigned long arg3, | |
513 | unsigned long arg4, | |
514 | unsigned long arg5) = entry->func; | |
1b7b9c65 | 515 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
259b6cb3 | 516 | |
1b7b9c65 | 517 | lttng_syscall_get_arguments(current, regs, args); |
259b6cb3 MD |
518 | fptr(event, args[0], args[1], args[2], |
519 | args[3], args[4], args[5]); | |
520 | break; | |
521 | } | |
522 | default: | |
523 | break; | |
524 | } | |
525 | } | |
526 | ||
5b7ac358 | 527 | static void syscall_exit_unknown(struct lttng_event *event, |
74f7b56a | 528 | struct pt_regs *regs, int id, long ret) |
5b7ac358 | 529 | { |
1b7b9c65 | 530 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 531 | |
1b7b9c65 | 532 | lttng_syscall_get_arguments(current, regs, args); |
1aa3298b | 533 | if (unlikely(in_compat_syscall())) |
5b7ac358 MD |
534 | __event_probe__compat_syscall_exit_unknown(event, id, ret, |
535 | args); | |
536 | else | |
537 | __event_probe__syscall_exit_unknown(event, id, ret, args); | |
538 | } | |
539 | ||
540 | void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) | |
541 | { | |
542 | struct lttng_channel *chan = __data; | |
543 | struct lttng_event *event, *unknown_event; | |
544 | const struct trace_syscall_entry *table, *entry; | |
545 | size_t table_len; | |
546 | long id; | |
547 | ||
f75983c2 MD |
548 | #ifdef CONFIG_X86_X32_ABI |
549 | if (in_x32_syscall()) { | |
550 | /* x32 system calls are not supported. */ | |
551 | return; | |
552 | } | |
553 | #endif | |
5b7ac358 | 554 | id = syscall_get_nr(current, regs); |
1aa3298b | 555 | if (unlikely(in_compat_syscall())) { |
ad594e3a MD |
556 | struct lttng_syscall_filter *filter = chan->sc_filter; |
557 | ||
558 | if (id < 0 || id >= NR_compat_syscalls | |
559 | || (!READ_ONCE(chan->syscall_all) && !test_bit(id, filter->sc_compat_exit))) { | |
560 | /* System call filtered out. */ | |
561 | return; | |
5b7ac358 MD |
562 | } |
563 | table = compat_sc_exit_table; | |
564 | table_len = ARRAY_SIZE(compat_sc_exit_table); | |
565 | unknown_event = chan->compat_sc_exit_unknown; | |
566 | } else { | |
ad594e3a MD |
567 | struct lttng_syscall_filter *filter = chan->sc_filter; |
568 | ||
569 | if (id < 0 || id >= NR_syscalls | |
570 | || (!READ_ONCE(chan->syscall_all) && !test_bit(id, filter->sc_exit))) { | |
571 | /* System call filtered out. */ | |
572 | return; | |
5b7ac358 MD |
573 | } |
574 | table = sc_exit_table; | |
575 | table_len = ARRAY_SIZE(sc_exit_table); | |
576 | unknown_event = chan->sc_exit_unknown; | |
577 | } | |
74f7b56a | 578 | if (unlikely(id < 0 || id >= table_len)) { |
5b7ac358 MD |
579 | syscall_exit_unknown(unknown_event, regs, id, ret); |
580 | return; | |
581 | } | |
1aa3298b | 582 | if (unlikely(in_compat_syscall())) |
5b7ac358 MD |
583 | event = chan->compat_sc_exit_table[id]; |
584 | else | |
585 | event = chan->sc_exit_table[id]; | |
586 | if (unlikely(!event)) { | |
587 | syscall_exit_unknown(unknown_event, regs, id, ret); | |
588 | return; | |
589 | } | |
590 | entry = &table[id]; | |
591 | WARN_ON_ONCE(!entry); | |
592 | ||
593 | switch (entry->nrargs) { | |
594 | case 0: | |
595 | { | |
fc4f7161 | 596 | void (*fptr)(void *__data, long ret) = entry->func; |
5b7ac358 | 597 | |
fc4f7161 | 598 | fptr(event, ret); |
5b7ac358 MD |
599 | break; |
600 | } | |
601 | case 1: | |
602 | { | |
603 | void (*fptr)(void *__data, | |
fc4f7161 | 604 | long ret, |
5b7ac358 | 605 | unsigned long arg0) = entry->func; |
1b7b9c65 | 606 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 607 | |
1b7b9c65 | 608 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 609 | fptr(event, ret, args[0]); |
5b7ac358 MD |
610 | break; |
611 | } | |
612 | case 2: | |
613 | { | |
614 | void (*fptr)(void *__data, | |
fc4f7161 | 615 | long ret, |
5b7ac358 MD |
616 | unsigned long arg0, |
617 | unsigned long arg1) = entry->func; | |
1b7b9c65 | 618 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 619 | |
1b7b9c65 | 620 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 621 | fptr(event, ret, args[0], args[1]); |
5b7ac358 MD |
622 | break; |
623 | } | |
624 | case 3: | |
625 | { | |
626 | void (*fptr)(void *__data, | |
fc4f7161 | 627 | long ret, |
5b7ac358 MD |
628 | unsigned long arg0, |
629 | unsigned long arg1, | |
630 | unsigned long arg2) = entry->func; | |
1b7b9c65 | 631 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 632 | |
1b7b9c65 | 633 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 634 | fptr(event, ret, args[0], args[1], args[2]); |
5b7ac358 MD |
635 | break; |
636 | } | |
637 | case 4: | |
638 | { | |
639 | void (*fptr)(void *__data, | |
fc4f7161 | 640 | long ret, |
5b7ac358 MD |
641 | unsigned long arg0, |
642 | unsigned long arg1, | |
643 | unsigned long arg2, | |
644 | unsigned long arg3) = entry->func; | |
1b7b9c65 | 645 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 646 | |
1b7b9c65 | 647 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 648 | fptr(event, ret, args[0], args[1], args[2], args[3]); |
5b7ac358 MD |
649 | break; |
650 | } | |
651 | case 5: | |
652 | { | |
653 | void (*fptr)(void *__data, | |
fc4f7161 | 654 | long ret, |
5b7ac358 MD |
655 | unsigned long arg0, |
656 | unsigned long arg1, | |
657 | unsigned long arg2, | |
658 | unsigned long arg3, | |
659 | unsigned long arg4) = entry->func; | |
1b7b9c65 | 660 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 661 | |
1b7b9c65 | 662 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 663 | fptr(event, ret, args[0], args[1], args[2], args[3], args[4]); |
5b7ac358 MD |
664 | break; |
665 | } | |
666 | case 6: | |
667 | { | |
668 | void (*fptr)(void *__data, | |
fc4f7161 | 669 | long ret, |
5b7ac358 MD |
670 | unsigned long arg0, |
671 | unsigned long arg1, | |
672 | unsigned long arg2, | |
673 | unsigned long arg3, | |
674 | unsigned long arg4, | |
675 | unsigned long arg5) = entry->func; | |
1b7b9c65 | 676 | unsigned long args[LTTNG_SYSCALL_NR_ARGS]; |
5b7ac358 | 677 | |
1b7b9c65 | 678 | lttng_syscall_get_arguments(current, regs, args); |
fc4f7161 | 679 | fptr(event, ret, args[0], args[1], args[2], |
5b7ac358 MD |
680 | args[3], args[4], args[5]); |
681 | break; | |
682 | } | |
683 | default: | |
684 | break; | |
685 | } | |
686 | } | |
687 | ||
33a39a3c MD |
688 | /* |
689 | * noinline to diminish caller stack size. | |
690 | * Should be called with sessions lock held. | |
691 | */ | |
49c50022 MD |
692 | static |
693 | int fill_table(const struct trace_syscall_entry *table, size_t table_len, | |
5b7ac358 MD |
694 | struct lttng_event **chan_table, struct lttng_channel *chan, |
695 | void *filter, enum sc_type type) | |
259b6cb3 | 696 | { |
2a0c4816 | 697 | const struct lttng_event_desc *desc; |
259b6cb3 | 698 | unsigned int i; |
49c50022 MD |
699 | |
700 | /* Allocate events for each syscall, insert into table */ | |
701 | for (i = 0; i < table_len; i++) { | |
702 | struct lttng_kernel_event ev; | |
2a0c4816 | 703 | desc = table[i].desc; |
49c50022 MD |
704 | |
705 | if (!desc) { | |
706 | /* Unknown syscall */ | |
707 | continue; | |
708 | } | |
709 | /* | |
710 | * Skip those already populated by previous failed | |
711 | * register for this channel. | |
712 | */ | |
713 | if (chan_table[i]) | |
714 | continue; | |
715 | memset(&ev, 0, sizeof(ev)); | |
5b7ac358 MD |
716 | switch (type) { |
717 | case SC_TYPE_ENTRY: | |
ad594e3a MD |
718 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY; |
719 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE; | |
5b7ac358 MD |
720 | break; |
721 | case SC_TYPE_EXIT: | |
ad594e3a MD |
722 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT; |
723 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE; | |
5b7ac358 MD |
724 | break; |
725 | case SC_TYPE_COMPAT_ENTRY: | |
ad594e3a MD |
726 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY; |
727 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT; | |
5b7ac358 MD |
728 | break; |
729 | case SC_TYPE_COMPAT_EXIT: | |
ad594e3a MD |
730 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT; |
731 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT; | |
5b7ac358 MD |
732 | break; |
733 | } | |
b260f699 | 734 | strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN - 1); |
f8695253 | 735 | ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; |
33a39a3c MD |
736 | ev.instrumentation = LTTNG_KERNEL_SYSCALL; |
737 | chan_table[i] = _lttng_event_create(chan, &ev, filter, | |
3c997079 | 738 | desc, ev.instrumentation); |
abc0446a MD |
739 | WARN_ON_ONCE(!chan_table[i]); |
740 | if (IS_ERR(chan_table[i])) { | |
49c50022 MD |
741 | /* |
742 | * If something goes wrong in event registration | |
743 | * after the first one, we have no choice but to | |
744 | * leave the previous events in there, until | |
745 | * deleted by session teardown. | |
746 | */ | |
abc0446a | 747 | return PTR_ERR(chan_table[i]); |
49c50022 MD |
748 | } |
749 | } | |
750 | return 0; | |
751 | } | |
752 | ||
33a39a3c MD |
753 | /* |
754 | * Should be called with sessions lock held. | |
755 | */ | |
a90917c3 | 756 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
49c50022 | 757 | { |
2a0c4816 | 758 | struct lttng_kernel_event ev; |
259b6cb3 MD |
759 | int ret; |
760 | ||
ea53823c | 761 | wrapper_vmalloc_sync_mappings(); |
259b6cb3 MD |
762 | |
763 | if (!chan->sc_table) { | |
764 | /* create syscall table mapping syscall to events */ | |
a90917c3 | 765 | chan->sc_table = kzalloc(sizeof(struct lttng_event *) |
259b6cb3 MD |
766 | * ARRAY_SIZE(sc_table), GFP_KERNEL); |
767 | if (!chan->sc_table) | |
768 | return -ENOMEM; | |
769 | } | |
5b7ac358 MD |
770 | if (!chan->sc_exit_table) { |
771 | /* create syscall table mapping syscall to events */ | |
772 | chan->sc_exit_table = kzalloc(sizeof(struct lttng_event *) | |
773 | * ARRAY_SIZE(sc_exit_table), GFP_KERNEL); | |
774 | if (!chan->sc_exit_table) | |
775 | return -ENOMEM; | |
776 | } | |
777 | ||
259b6cb3 | 778 | |
49c50022 MD |
779 | #ifdef CONFIG_COMPAT |
780 | if (!chan->compat_sc_table) { | |
781 | /* create syscall table mapping compat syscall to events */ | |
a90917c3 | 782 | chan->compat_sc_table = kzalloc(sizeof(struct lttng_event *) |
a93244f8 | 783 | * ARRAY_SIZE(compat_sc_table), GFP_KERNEL); |
49c50022 MD |
784 | if (!chan->compat_sc_table) |
785 | return -ENOMEM; | |
786 | } | |
5b7ac358 MD |
787 | |
788 | if (!chan->compat_sc_exit_table) { | |
789 | /* create syscall table mapping compat syscall to events */ | |
790 | chan->compat_sc_exit_table = kzalloc(sizeof(struct lttng_event *) | |
791 | * ARRAY_SIZE(compat_sc_exit_table), GFP_KERNEL); | |
792 | if (!chan->compat_sc_exit_table) | |
793 | return -ENOMEM; | |
794 | } | |
49c50022 | 795 | #endif |
f405cfce | 796 | if (!chan->sc_unknown) { |
f405cfce | 797 | const struct lttng_event_desc *desc = |
d4291869 | 798 | &__event_desc___syscall_entry_unknown; |
2f804c0a | 799 | |
f405cfce | 800 | memset(&ev, 0, sizeof(ev)); |
f8695253 MD |
801 | strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN); |
802 | ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
33a39a3c | 803 | ev.instrumentation = LTTNG_KERNEL_SYSCALL; |
ad594e3a MD |
804 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY; |
805 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE; | |
33a39a3c | 806 | chan->sc_unknown = _lttng_event_create(chan, &ev, filter, |
3c997079 MD |
807 | desc, |
808 | ev.instrumentation); | |
abc0446a MD |
809 | WARN_ON_ONCE(!chan->sc_unknown); |
810 | if (IS_ERR(chan->sc_unknown)) { | |
811 | return PTR_ERR(chan->sc_unknown); | |
f405cfce MD |
812 | } |
813 | } | |
814 | ||
b76dc1a0 | 815 | if (!chan->sc_compat_unknown) { |
b76dc1a0 | 816 | const struct lttng_event_desc *desc = |
d4291869 | 817 | &__event_desc___compat_syscall_entry_unknown; |
b76dc1a0 MD |
818 | |
819 | memset(&ev, 0, sizeof(ev)); | |
f8695253 MD |
820 | strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN); |
821 | ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
33a39a3c | 822 | ev.instrumentation = LTTNG_KERNEL_SYSCALL; |
ad594e3a MD |
823 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY; |
824 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT; | |
33a39a3c | 825 | chan->sc_compat_unknown = _lttng_event_create(chan, &ev, filter, |
3c997079 MD |
826 | desc, |
827 | ev.instrumentation); | |
abc0446a MD |
828 | WARN_ON_ONCE(!chan->sc_unknown); |
829 | if (IS_ERR(chan->sc_compat_unknown)) { | |
830 | return PTR_ERR(chan->sc_compat_unknown); | |
b76dc1a0 MD |
831 | } |
832 | } | |
833 | ||
5b7ac358 | 834 | if (!chan->compat_sc_exit_unknown) { |
2f804c0a | 835 | const struct lttng_event_desc *desc = |
5b7ac358 | 836 | &__event_desc___compat_syscall_exit_unknown; |
2f804c0a MD |
837 | |
838 | memset(&ev, 0, sizeof(ev)); | |
f8695253 MD |
839 | strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN); |
840 | ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
33a39a3c | 841 | ev.instrumentation = LTTNG_KERNEL_SYSCALL; |
ad594e3a MD |
842 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT; |
843 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT; | |
33a39a3c | 844 | chan->compat_sc_exit_unknown = _lttng_event_create(chan, &ev, |
3c997079 MD |
845 | filter, desc, |
846 | ev.instrumentation); | |
5b7ac358 MD |
847 | WARN_ON_ONCE(!chan->compat_sc_exit_unknown); |
848 | if (IS_ERR(chan->compat_sc_exit_unknown)) { | |
849 | return PTR_ERR(chan->compat_sc_exit_unknown); | |
850 | } | |
851 | } | |
852 | ||
853 | if (!chan->sc_exit_unknown) { | |
854 | const struct lttng_event_desc *desc = | |
855 | &__event_desc___syscall_exit_unknown; | |
856 | ||
857 | memset(&ev, 0, sizeof(ev)); | |
858 | strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN); | |
859 | ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
33a39a3c | 860 | ev.instrumentation = LTTNG_KERNEL_SYSCALL; |
ad594e3a MD |
861 | ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT; |
862 | ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE; | |
33a39a3c | 863 | chan->sc_exit_unknown = _lttng_event_create(chan, &ev, filter, |
3c997079 | 864 | desc, ev.instrumentation); |
5b7ac358 MD |
865 | WARN_ON_ONCE(!chan->sc_exit_unknown); |
866 | if (IS_ERR(chan->sc_exit_unknown)) { | |
867 | return PTR_ERR(chan->sc_exit_unknown); | |
2f804c0a MD |
868 | } |
869 | } | |
870 | ||
49c50022 | 871 | ret = fill_table(sc_table, ARRAY_SIZE(sc_table), |
5b7ac358 MD |
872 | chan->sc_table, chan, filter, SC_TYPE_ENTRY); |
873 | if (ret) | |
874 | return ret; | |
875 | ret = fill_table(sc_exit_table, ARRAY_SIZE(sc_exit_table), | |
876 | chan->sc_exit_table, chan, filter, SC_TYPE_EXIT); | |
49c50022 MD |
877 | if (ret) |
878 | return ret; | |
5b7ac358 | 879 | |
49c50022 | 880 | #ifdef CONFIG_COMPAT |
a93244f8 | 881 | ret = fill_table(compat_sc_table, ARRAY_SIZE(compat_sc_table), |
5b7ac358 MD |
882 | chan->compat_sc_table, chan, filter, |
883 | SC_TYPE_COMPAT_ENTRY); | |
884 | if (ret) | |
885 | return ret; | |
886 | ret = fill_table(compat_sc_exit_table, ARRAY_SIZE(compat_sc_exit_table), | |
887 | chan->compat_sc_exit_table, chan, filter, | |
888 | SC_TYPE_COMPAT_EXIT); | |
49c50022 MD |
889 | if (ret) |
890 | return ret; | |
891 | #endif | |
ad594e3a MD |
892 | |
893 | if (!chan->sc_filter) { | |
894 | chan->sc_filter = kzalloc(sizeof(struct lttng_syscall_filter), | |
895 | GFP_KERNEL); | |
896 | if (!chan->sc_filter) | |
897 | return -ENOMEM; | |
898 | } | |
899 | ||
80f87dd2 MD |
900 | if (!chan->sys_enter_registered) { |
901 | ret = lttng_wrapper_tracepoint_probe_register("sys_enter", | |
902 | (void *) syscall_entry_probe, chan); | |
903 | if (ret) | |
904 | return ret; | |
905 | chan->sys_enter_registered = 1; | |
906 | } | |
63728b02 MD |
907 | /* |
908 | * We change the name of sys_exit tracepoint due to namespace | |
909 | * conflict with sys_exit syscall entry. | |
910 | */ | |
80f87dd2 MD |
911 | if (!chan->sys_exit_registered) { |
912 | ret = lttng_wrapper_tracepoint_probe_register("sys_exit", | |
5b7ac358 | 913 | (void *) syscall_exit_probe, chan); |
80f87dd2 MD |
914 | if (ret) { |
915 | WARN_ON_ONCE(lttng_wrapper_tracepoint_probe_unregister("sys_enter", | |
916 | (void *) syscall_entry_probe, chan)); | |
917 | return ret; | |
918 | } | |
919 | chan->sys_exit_registered = 1; | |
63728b02 | 920 | } |
259b6cb3 MD |
921 | return ret; |
922 | } | |
923 | ||
924 | /* | |
925 | * Only called at session destruction. | |
926 | */ | |
a90917c3 | 927 | int lttng_syscalls_unregister(struct lttng_channel *chan) |
259b6cb3 MD |
928 | { |
929 | int ret; | |
930 | ||
931 | if (!chan->sc_table) | |
932 | return 0; | |
80f87dd2 | 933 | if (chan->sys_enter_registered) { |
2d9cd7f3 FD |
934 | ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter", |
935 | (void *) syscall_entry_probe, chan); | |
80f87dd2 MD |
936 | if (ret) |
937 | return ret; | |
938 | chan->sys_enter_registered = 0; | |
939 | } | |
940 | if (chan->sys_exit_registered) { | |
2d9cd7f3 FD |
941 | ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit", |
942 | (void *) syscall_exit_probe, chan); | |
80f87dd2 MD |
943 | if (ret) |
944 | return ret; | |
945 | chan->sys_exit_registered = 0; | |
946 | } | |
ad594e3a MD |
947 | return 0; |
948 | } | |
949 | ||
950 | int lttng_syscalls_destroy(struct lttng_channel *chan) | |
951 | { | |
259b6cb3 | 952 | kfree(chan->sc_table); |
5b7ac358 | 953 | kfree(chan->sc_exit_table); |
49c50022 MD |
954 | #ifdef CONFIG_COMPAT |
955 | kfree(chan->compat_sc_table); | |
5b7ac358 | 956 | kfree(chan->compat_sc_exit_table); |
49c50022 | 957 | #endif |
80f87dd2 MD |
958 | kfree(chan->sc_filter); |
959 | return 0; | |
960 | } | |
961 | ||
962 | static | |
963 | int get_syscall_nr(const char *syscall_name) | |
964 | { | |
965 | int syscall_nr = -1; | |
966 | int i; | |
967 | ||
968 | for (i = 0; i < ARRAY_SIZE(sc_table); i++) { | |
969 | const struct trace_syscall_entry *entry; | |
5b7ac358 | 970 | const char *it_name; |
80f87dd2 MD |
971 | |
972 | entry = &sc_table[i]; | |
973 | if (!entry->desc) | |
974 | continue; | |
5b7ac358 MD |
975 | it_name = entry->desc->name; |
976 | it_name += strlen(SYSCALL_ENTRY_STR); | |
977 | if (!strcmp(syscall_name, it_name)) { | |
80f87dd2 MD |
978 | syscall_nr = i; |
979 | break; | |
980 | } | |
981 | } | |
982 | return syscall_nr; | |
983 | } | |
984 | ||
985 | static | |
986 | int get_compat_syscall_nr(const char *syscall_name) | |
987 | { | |
988 | int syscall_nr = -1; | |
989 | int i; | |
990 | ||
991 | for (i = 0; i < ARRAY_SIZE(compat_sc_table); i++) { | |
992 | const struct trace_syscall_entry *entry; | |
5b7ac358 | 993 | const char *it_name; |
80f87dd2 MD |
994 | |
995 | entry = &compat_sc_table[i]; | |
996 | if (!entry->desc) | |
997 | continue; | |
5b7ac358 MD |
998 | it_name = entry->desc->name; |
999 | it_name += strlen(COMPAT_SYSCALL_ENTRY_STR); | |
1000 | if (!strcmp(syscall_name, it_name)) { | |
80f87dd2 MD |
1001 | syscall_nr = i; |
1002 | break; | |
1003 | } | |
1004 | } | |
1005 | return syscall_nr; | |
1006 | } | |
1007 | ||
12e579db MD |
1008 | static |
1009 | uint32_t get_sc_tables_len(void) | |
1010 | { | |
1011 | return ARRAY_SIZE(sc_table) + ARRAY_SIZE(compat_sc_table); | |
1012 | } | |
1013 | ||
ad594e3a MD |
1014 | static |
1015 | const char *get_syscall_name(struct lttng_event *event) | |
80f87dd2 | 1016 | { |
ad594e3a | 1017 | size_t prefix_len = 0; |
80f87dd2 | 1018 | |
ad594e3a | 1019 | WARN_ON_ONCE(event->instrumentation != LTTNG_KERNEL_SYSCALL); |
80f87dd2 | 1020 | |
ad594e3a MD |
1021 | switch (event->u.syscall.entryexit) { |
1022 | case LTTNG_SYSCALL_ENTRY: | |
1023 | switch (event->u.syscall.abi) { | |
1024 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1025 | prefix_len = strlen(SYSCALL_ENTRY_STR); | |
1026 | break; | |
1027 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1028 | prefix_len = strlen(COMPAT_SYSCALL_ENTRY_STR); | |
1029 | break; | |
80f87dd2 | 1030 | } |
ad594e3a MD |
1031 | break; |
1032 | case LTTNG_SYSCALL_EXIT: | |
1033 | switch (event->u.syscall.abi) { | |
1034 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1035 | prefix_len = strlen(SYSCALL_EXIT_STR); | |
1036 | break; | |
1037 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1038 | prefix_len = strlen(COMPAT_SYSCALL_EXIT_STR); | |
1039 | break; | |
80f87dd2 | 1040 | } |
ad594e3a | 1041 | break; |
80f87dd2 | 1042 | } |
ad594e3a MD |
1043 | WARN_ON_ONCE(prefix_len == 0); |
1044 | return event->desc->name + prefix_len; | |
1045 | } | |
1046 | ||
1047 | int lttng_syscall_filter_enable(struct lttng_channel *chan, | |
1048 | struct lttng_event *event) | |
1049 | { | |
1050 | struct lttng_syscall_filter *filter = chan->sc_filter; | |
1051 | const char *syscall_name; | |
1052 | unsigned long *bitmap; | |
1053 | int syscall_nr; | |
1054 | ||
1055 | WARN_ON_ONCE(!chan->sc_table); | |
1056 | ||
1057 | syscall_name = get_syscall_name(event); | |
1058 | ||
1059 | switch (event->u.syscall.abi) { | |
1060 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1061 | syscall_nr = get_syscall_nr(syscall_name); | |
1062 | break; | |
1063 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1064 | syscall_nr = get_compat_syscall_nr(syscall_name); | |
1065 | break; | |
1066 | default: | |
1067 | return -EINVAL; | |
80f87dd2 | 1068 | } |
ad594e3a MD |
1069 | if (syscall_nr < 0) |
1070 | return -ENOENT; | |
1071 | ||
ad594e3a MD |
1072 | switch (event->u.syscall.entryexit) { |
1073 | case LTTNG_SYSCALL_ENTRY: | |
1074 | switch (event->u.syscall.abi) { | |
1075 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1076 | bitmap = filter->sc_entry; | |
1077 | break; | |
1078 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1079 | bitmap = filter->sc_compat_entry; | |
1080 | break; | |
638dcfc6 MD |
1081 | default: |
1082 | return -EINVAL; | |
80f87dd2 | 1083 | } |
ad594e3a MD |
1084 | break; |
1085 | case LTTNG_SYSCALL_EXIT: | |
1086 | switch (event->u.syscall.abi) { | |
1087 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1088 | bitmap = filter->sc_exit; | |
1089 | break; | |
1090 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1091 | bitmap = filter->sc_compat_exit; | |
1092 | break; | |
638dcfc6 MD |
1093 | default: |
1094 | return -EINVAL; | |
80f87dd2 | 1095 | } |
ad594e3a MD |
1096 | break; |
1097 | default: | |
1098 | return -EINVAL; | |
80f87dd2 | 1099 | } |
ad594e3a MD |
1100 | if (test_bit(syscall_nr, bitmap)) |
1101 | return -EEXIST; | |
1102 | bitmap_set(bitmap, syscall_nr, 1); | |
80f87dd2 | 1103 | return 0; |
80f87dd2 MD |
1104 | } |
1105 | ||
1106 | int lttng_syscall_filter_disable(struct lttng_channel *chan, | |
ad594e3a | 1107 | struct lttng_event *event) |
80f87dd2 | 1108 | { |
ad594e3a MD |
1109 | struct lttng_syscall_filter *filter = chan->sc_filter; |
1110 | const char *syscall_name; | |
1111 | unsigned long *bitmap; | |
1112 | int syscall_nr; | |
80f87dd2 MD |
1113 | |
1114 | WARN_ON_ONCE(!chan->sc_table); | |
1115 | ||
ad594e3a MD |
1116 | syscall_name = get_syscall_name(event); |
1117 | ||
1118 | switch (event->u.syscall.abi) { | |
1119 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1120 | syscall_nr = get_syscall_nr(syscall_name); | |
1121 | break; | |
1122 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1123 | syscall_nr = get_compat_syscall_nr(syscall_name); | |
1124 | break; | |
1125 | default: | |
1126 | return -EINVAL; | |
80f87dd2 | 1127 | } |
ad594e3a MD |
1128 | if (syscall_nr < 0) |
1129 | return -ENOENT; | |
80f87dd2 | 1130 | |
ad594e3a MD |
1131 | switch (event->u.syscall.entryexit) { |
1132 | case LTTNG_SYSCALL_ENTRY: | |
1133 | switch (event->u.syscall.abi) { | |
1134 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1135 | bitmap = filter->sc_entry; | |
1136 | break; | |
1137 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1138 | bitmap = filter->sc_compat_entry; | |
1139 | break; | |
638dcfc6 MD |
1140 | default: |
1141 | return -EINVAL; | |
80f87dd2 | 1142 | } |
ad594e3a MD |
1143 | break; |
1144 | case LTTNG_SYSCALL_EXIT: | |
1145 | switch (event->u.syscall.abi) { | |
1146 | case LTTNG_SYSCALL_ABI_NATIVE: | |
1147 | bitmap = filter->sc_exit; | |
1148 | break; | |
1149 | case LTTNG_SYSCALL_ABI_COMPAT: | |
1150 | bitmap = filter->sc_compat_exit; | |
1151 | break; | |
638dcfc6 MD |
1152 | default: |
1153 | return -EINVAL; | |
80f87dd2 | 1154 | } |
ad594e3a MD |
1155 | break; |
1156 | default: | |
1157 | return -EINVAL; | |
80f87dd2 | 1158 | } |
ad594e3a MD |
1159 | if (!test_bit(syscall_nr, bitmap)) |
1160 | return -EEXIST; | |
1161 | bitmap_clear(bitmap, syscall_nr, 1); | |
80f87dd2 | 1162 | |
ad594e3a | 1163 | return 0; |
259b6cb3 | 1164 | } |
2d2464bd MD |
1165 | |
1166 | static | |
1167 | const struct trace_syscall_entry *syscall_list_get_entry(loff_t *pos) | |
1168 | { | |
1169 | const struct trace_syscall_entry *entry; | |
1170 | int iter = 0; | |
1171 | ||
1172 | for (entry = sc_table; | |
1173 | entry < sc_table + ARRAY_SIZE(sc_table); | |
1174 | entry++) { | |
1175 | if (iter++ >= *pos) | |
1176 | return entry; | |
1177 | } | |
1178 | for (entry = compat_sc_table; | |
1179 | entry < compat_sc_table + ARRAY_SIZE(compat_sc_table); | |
1180 | entry++) { | |
1181 | if (iter++ >= *pos) | |
1182 | return entry; | |
1183 | } | |
1184 | /* End of list */ | |
1185 | return NULL; | |
1186 | } | |
1187 | ||
1188 | static | |
1189 | void *syscall_list_start(struct seq_file *m, loff_t *pos) | |
1190 | { | |
1191 | return (void *) syscall_list_get_entry(pos); | |
1192 | } | |
1193 | ||
1194 | static | |
1195 | void *syscall_list_next(struct seq_file *m, void *p, loff_t *ppos) | |
1196 | { | |
1197 | (*ppos)++; | |
1198 | return (void *) syscall_list_get_entry(ppos); | |
1199 | } | |
1200 | ||
1201 | static | |
1202 | void syscall_list_stop(struct seq_file *m, void *p) | |
1203 | { | |
1204 | } | |
1205 | ||
12e579db MD |
1206 | static |
1207 | int get_sc_table(const struct trace_syscall_entry *entry, | |
1208 | const struct trace_syscall_entry **table, | |
1209 | unsigned int *bitness) | |
1210 | { | |
1211 | if (entry >= sc_table && entry < sc_table + ARRAY_SIZE(sc_table)) { | |
1212 | if (bitness) | |
1213 | *bitness = BITS_PER_LONG; | |
1214 | if (table) | |
1215 | *table = sc_table; | |
1216 | return 0; | |
1217 | } | |
1218 | if (!(entry >= compat_sc_table | |
1219 | && entry < compat_sc_table + ARRAY_SIZE(compat_sc_table))) { | |
1220 | return -EINVAL; | |
1221 | } | |
1222 | if (bitness) | |
1223 | *bitness = 32; | |
1224 | if (table) | |
1225 | *table = compat_sc_table; | |
1226 | return 0; | |
1227 | } | |
1228 | ||
2d2464bd MD |
1229 | static |
1230 | int syscall_list_show(struct seq_file *m, void *p) | |
1231 | { | |
1232 | const struct trace_syscall_entry *table, *entry = p; | |
1233 | unsigned int bitness; | |
d4291869 | 1234 | unsigned long index; |
12e579db | 1235 | int ret; |
d4291869 | 1236 | const char *name; |
2d2464bd | 1237 | |
12e579db MD |
1238 | ret = get_sc_table(entry, &table, &bitness); |
1239 | if (ret) | |
1240 | return ret; | |
f4855b46 MD |
1241 | if (!entry->desc) |
1242 | return 0; | |
d4291869 MD |
1243 | if (table == sc_table) { |
1244 | index = entry - table; | |
1245 | name = &entry->desc->name[strlen(SYSCALL_ENTRY_STR)]; | |
1246 | } else { | |
1247 | index = (entry - table) + ARRAY_SIZE(sc_table); | |
1248 | name = &entry->desc->name[strlen(COMPAT_SYSCALL_ENTRY_STR)]; | |
1249 | } | |
12e579db | 1250 | seq_printf(m, "syscall { index = %lu; name = %s; bitness = %u; };\n", |
d4291869 | 1251 | index, name, bitness); |
2d2464bd MD |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | static | |
1256 | const struct seq_operations lttng_syscall_list_seq_ops = { | |
1257 | .start = syscall_list_start, | |
1258 | .next = syscall_list_next, | |
1259 | .stop = syscall_list_stop, | |
1260 | .show = syscall_list_show, | |
1261 | }; | |
1262 | ||
1263 | static | |
1264 | int lttng_syscall_list_open(struct inode *inode, struct file *file) | |
1265 | { | |
1266 | return seq_open(file, <tng_syscall_list_seq_ops); | |
1267 | } | |
1268 | ||
1269 | const struct file_operations lttng_syscall_list_fops = { | |
1270 | .owner = THIS_MODULE, | |
1271 | .open = lttng_syscall_list_open, | |
1272 | .read = seq_read, | |
1273 | .llseek = seq_lseek, | |
1274 | .release = seq_release, | |
1275 | }; | |
12e579db | 1276 | |
ad594e3a MD |
1277 | /* |
1278 | * A syscall is enabled if it is traced for either entry or exit. | |
1279 | */ | |
12e579db MD |
1280 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
1281 | struct lttng_kernel_syscall_mask __user *usyscall_mask) | |
1282 | { | |
1283 | uint32_t len, sc_tables_len, bitmask_len; | |
1284 | int ret = 0, bit; | |
1285 | char *tmp_mask; | |
1286 | struct lttng_syscall_filter *filter; | |
1287 | ||
1288 | ret = get_user(len, &usyscall_mask->len); | |
1289 | if (ret) | |
1290 | return ret; | |
1291 | sc_tables_len = get_sc_tables_len(); | |
1292 | bitmask_len = ALIGN(sc_tables_len, 8) >> 3; | |
1293 | if (len < sc_tables_len) { | |
1294 | return put_user(sc_tables_len, &usyscall_mask->len); | |
1295 | } | |
1296 | /* Array is large enough, we can copy array to user-space. */ | |
1297 | tmp_mask = kzalloc(bitmask_len, GFP_KERNEL); | |
1298 | if (!tmp_mask) | |
1299 | return -ENOMEM; | |
1300 | filter = channel->sc_filter; | |
1301 | ||
1302 | for (bit = 0; bit < ARRAY_SIZE(sc_table); bit++) { | |
e2129868 | 1303 | char state; |
2f25059d MD |
1304 | |
1305 | if (channel->sc_table) { | |
ad594e3a MD |
1306 | if (!READ_ONCE(channel->syscall_all) && filter) |
1307 | state = test_bit(bit, filter->sc_entry) | |
1308 | || test_bit(bit, filter->sc_exit); | |
2f25059d MD |
1309 | else |
1310 | state = 1; | |
1311 | } else { | |
1312 | state = 0; | |
1313 | } | |
1314 | bt_bitfield_write_be(tmp_mask, char, bit, 1, state); | |
12e579db MD |
1315 | } |
1316 | for (; bit < sc_tables_len; bit++) { | |
e2129868 | 1317 | char state; |
2f25059d MD |
1318 | |
1319 | if (channel->compat_sc_table) { | |
ad594e3a | 1320 | if (!READ_ONCE(channel->syscall_all) && filter) |
2f25059d | 1321 | state = test_bit(bit - ARRAY_SIZE(sc_table), |
ad594e3a MD |
1322 | filter->sc_compat_entry) |
1323 | || test_bit(bit - ARRAY_SIZE(sc_table), | |
1324 | filter->sc_compat_exit); | |
2f25059d MD |
1325 | else |
1326 | state = 1; | |
1327 | } else { | |
1328 | state = 0; | |
1329 | } | |
1330 | bt_bitfield_write_be(tmp_mask, char, bit, 1, state); | |
12e579db MD |
1331 | } |
1332 | if (copy_to_user(usyscall_mask->mask, tmp_mask, bitmask_len)) | |
1333 | ret = -EFAULT; | |
1334 | kfree(tmp_mask); | |
1335 | return ret; | |
1336 | } | |
082d4946 MD |
1337 | |
1338 | int lttng_abi_syscall_list(void) | |
1339 | { | |
1340 | struct file *syscall_list_file; | |
1341 | int file_fd, ret; | |
1342 | ||
4ac10b76 | 1343 | file_fd = lttng_get_unused_fd(); |
082d4946 MD |
1344 | if (file_fd < 0) { |
1345 | ret = file_fd; | |
1346 | goto fd_error; | |
1347 | } | |
1348 | ||
1349 | syscall_list_file = anon_inode_getfile("[lttng_syscall_list]", | |
1350 | <tng_syscall_list_fops, | |
1351 | NULL, O_RDWR); | |
1352 | if (IS_ERR(syscall_list_file)) { | |
1353 | ret = PTR_ERR(syscall_list_file); | |
1354 | goto file_error; | |
1355 | } | |
1356 | ret = lttng_syscall_list_fops.open(NULL, syscall_list_file); | |
1357 | if (ret < 0) | |
1358 | goto open_error; | |
1359 | fd_install(file_fd, syscall_list_file); | |
082d4946 MD |
1360 | return file_fd; |
1361 | ||
1362 | open_error: | |
1363 | fput(syscall_list_file); | |
1364 | file_error: | |
1365 | put_unused_fd(file_fd); | |
1366 | fd_error: | |
1367 | return ret; | |
1368 | } |