1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Common header file for probe-based Dynamic events. 4 * 5 * This code was copied from kernel/trace/trace_kprobe.h written by 6 * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> 7 * 8 * Updates to make this generic: 9 * Copyright (C) IBM Corporation, 2010-2011 10 * Author: Srikar Dronamraju 11 */ 12 13#include <linux/seq_file.h> 14#include <linux/slab.h> 15#include <linux/smp.h> 16#include <linux/tracefs.h> 17#include <linux/types.h> 18#include <linux/string.h> 19#include <linux/ptrace.h> 20#include <linux/perf_event.h> 21#include <linux/kprobes.h> 22#include <linux/stringify.h> 23#include <linux/limits.h> 24#include <linux/uaccess.h> 25#include <linux/bitops.h> 26#include <linux/btf.h> 27#include <asm/bitsperlong.h> 28 29#include "trace.h" 30#include "trace_output.h" 31 32#define MAX_TRACE_ARGS 128 33#define MAX_ARGSTR_LEN 63 34#define MAX_ARRAY_LEN 64 35#define MAX_ARG_NAME_LEN 32 36#define MAX_BTF_ARGS_LEN 128 37#define MAX_STRING_SIZE PATH_MAX 38#define MAX_ARG_BUF_LEN (MAX_TRACE_ARGS * MAX_ARG_NAME_LEN) 39 40/* Reserved field names */ 41#define FIELD_STRING_IP "__probe_ip" 42#define FIELD_STRING_RETIP "__probe_ret_ip" 43#define FIELD_STRING_FUNC "__probe_func" 44 45#undef DEFINE_FIELD 46#define DEFINE_FIELD(type, item, name, is_signed) \ 47 do { \ 48 ret = trace_define_field(event_call, #type, name, \ 49 offsetof(typeof(field), item), \ 50 sizeof(field.item), is_signed, \ 51 FILTER_OTHER); \ 52 if (ret) \ 53 return ret; \ 54 } while (0) 55 56 57/* Flags for trace_probe */ 58#define TP_FLAG_TRACE 1 59#define TP_FLAG_PROFILE 2 60 61/* data_loc: data location, compatible with u32 */ 62#define make_data_loc(len, offs) \ 63 (((u32)(len) << 16) | ((u32)(offs) & 0xffff)) 64#define get_loc_len(dl) ((u32)(dl) >> 16) 65#define get_loc_offs(dl) ((u32)(dl) & 0xffff) 66 67static nokprobe_inline void *get_loc_data(u32 *dl, void *ent) 68{ 69 return (u8 *)ent + get_loc_offs(*dl); 70} 71 72static nokprobe_inline u32 update_data_loc(u32 loc, int consumed) 73{ 74 u32 maxlen = get_loc_len(loc); 75 u32 offset = get_loc_offs(loc); 76 77 return make_data_loc(maxlen - consumed, offset + consumed); 78} 79 80/* Printing function type */ 81typedef int (*print_type_func_t)(struct trace_seq *, void *, void *); 82 83enum fetch_op { 84 FETCH_OP_NOP = 0, 85 // Stage 1 (load) ops 86 FETCH_OP_REG, /* Register : .param = offset */ 87 FETCH_OP_STACK, /* Stack : .param = index */ 88 FETCH_OP_STACKP, /* Stack pointer */ 89 FETCH_OP_RETVAL, /* Return value */ 90 FETCH_OP_IMM, /* Immediate : .immediate */ 91 FETCH_OP_COMM, /* Current comm */ 92 FETCH_OP_ARG, /* Function argument : .param */ 93 FETCH_OP_FOFFS, /* File offset: .immediate */ 94 FETCH_OP_DATA, /* Allocated data: .data */ 95 FETCH_OP_EDATA, /* Entry data: .offset */ 96 // Stage 2 (dereference) op 97 FETCH_OP_DEREF, /* Dereference: .offset */ 98 FETCH_OP_UDEREF, /* User-space Dereference: .offset */ 99 // Stage 3 (store) ops 100 FETCH_OP_ST_RAW, /* Raw: .size */ 101 FETCH_OP_ST_MEM, /* Mem: .offset, .size */ 102 FETCH_OP_ST_UMEM, /* Mem: .offset, .size */ 103 FETCH_OP_ST_STRING, /* String: .offset, .size */ 104 FETCH_OP_ST_USTRING, /* User String: .offset, .size */ 105 FETCH_OP_ST_SYMSTR, /* Kernel Symbol String: .offset, .size */ 106 FETCH_OP_ST_EDATA, /* Store Entry Data: .offset */ 107 // Stage 4 (modify) op 108 FETCH_OP_MOD_BF, /* Bitfield: .basesize, .lshift, .rshift */ 109 // Stage 5 (loop) op 110 FETCH_OP_LP_ARRAY, /* Array: .param = loop count */ 111 FETCH_OP_TP_ARG, /* Trace Point argument */ 112 FETCH_OP_END, 113 FETCH_NOP_SYMBOL, /* Unresolved Symbol holder */ 114}; 115 116struct fetch_insn { 117 enum fetch_op op; 118 union { 119 unsigned int param; 120 struct { 121 unsigned int size; 122 int offset; 123 }; 124 struct { 125 unsigned char basesize; 126 unsigned char lshift; 127 unsigned char rshift; 128 }; 129 unsigned long immediate; 130 void *data; 131 }; 132}; 133 134/* fetch + deref*N + store + mod + end <= 16, this allows N=12, enough */ 135#define FETCH_INSN_MAX 16 136#define FETCH_TOKEN_COMM (-ECOMM) 137 138/* Fetch type information table */ 139struct fetch_type { 140 const char *name; /* Name of type */ 141 size_t size; /* Byte size of type */ 142 bool is_signed; /* Signed flag */ 143 bool is_string; /* String flag */ 144 print_type_func_t print; /* Print functions */ 145 const char *fmt; /* Format string */ 146 const char *fmttype; /* Name in format file */ 147}; 148 149/* For defining macros, define string/string_size types */ 150typedef u32 string; 151typedef u32 string_size; 152 153#define PRINT_TYPE_FUNC_NAME(type) print_type_##type 154#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type 155 156/* Printing in basic type function template */ 157#define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \ 158int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, void *data, void *ent);\ 159extern const char PRINT_TYPE_FMT_NAME(type)[] 160 161DECLARE_BASIC_PRINT_TYPE_FUNC(u8); 162DECLARE_BASIC_PRINT_TYPE_FUNC(u16); 163DECLARE_BASIC_PRINT_TYPE_FUNC(u32); 164DECLARE_BASIC_PRINT_TYPE_FUNC(u64); 165DECLARE_BASIC_PRINT_TYPE_FUNC(s8); 166DECLARE_BASIC_PRINT_TYPE_FUNC(s16); 167DECLARE_BASIC_PRINT_TYPE_FUNC(s32); 168DECLARE_BASIC_PRINT_TYPE_FUNC(s64); 169DECLARE_BASIC_PRINT_TYPE_FUNC(x8); 170DECLARE_BASIC_PRINT_TYPE_FUNC(x16); 171DECLARE_BASIC_PRINT_TYPE_FUNC(x32); 172DECLARE_BASIC_PRINT_TYPE_FUNC(x64); 173 174DECLARE_BASIC_PRINT_TYPE_FUNC(char); 175DECLARE_BASIC_PRINT_TYPE_FUNC(string); 176DECLARE_BASIC_PRINT_TYPE_FUNC(symbol); 177 178/* Default (unsigned long) fetch type */ 179#define __DEFAULT_FETCH_TYPE(t) x##t 180#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t) 181#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG) 182#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE) 183 184#define __ADDR_FETCH_TYPE(t) u##t 185#define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t) 186#define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG) 187 188#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, str, _fmttype) \ 189 {.name = _name, \ 190 .size = _size, \ 191 .is_signed = (bool)sign, \ 192 .is_string = (bool)str, \ 193 .print = PRINT_TYPE_FUNC_NAME(ptype), \ 194 .fmt = PRINT_TYPE_FMT_NAME(ptype), \ 195 .fmttype = _fmttype, \ 196 } 197 198/* Non string types can use these macros */ 199#define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \ 200 __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, 0, #_fmttype) 201#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \ 202 _ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype) 203 204/* If ptype is an alias of atype, use this macro (show atype in format) */ 205#define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign) \ 206 _ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype) 207 208#define ASSIGN_FETCH_TYPE_END {} 209#define MAX_ARRAY_LEN 64 210 211#ifdef CONFIG_KPROBE_EVENTS 212bool trace_kprobe_on_func_entry(struct trace_event_call *call); 213bool trace_kprobe_error_injectable(struct trace_event_call *call); 214#else 215static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call) 216{ 217 return false; 218} 219 220static inline bool trace_kprobe_error_injectable(struct trace_event_call *call) 221{ 222 return false; 223} 224#endif /* CONFIG_KPROBE_EVENTS */ 225 226struct probe_arg { 227 struct fetch_insn *code; 228 bool dynamic;/* Dynamic array (string) is used */ 229 unsigned int offset; /* Offset from argument entry */ 230 unsigned int count; /* Array count */ 231 const char *name; /* Name of this argument */ 232 const char *comm; /* Command of this argument */ 233 char *fmt; /* Format string if needed */ 234 const struct fetch_type *type; /* Type of this argument */ 235}; 236 237struct probe_entry_arg { 238 struct fetch_insn *code; 239 unsigned int size; /* The entry data size */ 240}; 241 242struct trace_uprobe_filter { 243 rwlock_t rwlock; 244 int nr_systemwide; 245 struct list_head perf_events; 246}; 247 248/* Event call and class holder */ 249struct trace_probe_event { 250 unsigned int flags; /* For TP_FLAG_* */ 251 struct trace_event_class class; 252 struct trace_event_call call; 253 struct list_head files; 254 struct list_head probes; 255 struct trace_uprobe_filter filter[]; 256}; 257 258struct trace_probe { 259 struct list_head list; 260 struct trace_probe_event *event; 261 ssize_t size; /* trace entry size */ 262 unsigned int nr_args; 263 struct probe_entry_arg *entry_arg; /* This is only for return probe */ 264 struct probe_arg args[]; 265}; 266 267struct event_file_link { 268 struct trace_event_file *file; 269 struct list_head list; 270}; 271 272static inline bool trace_probe_test_flag(struct trace_probe *tp, 273 unsigned int flag) 274{ 275 return !!(tp->event->flags & flag); 276} 277 278static inline void trace_probe_set_flag(struct trace_probe *tp, 279 unsigned int flag) 280{ 281 tp->event->flags |= flag; 282} 283 284static inline void trace_probe_clear_flag(struct trace_probe *tp, 285 unsigned int flag) 286{ 287 tp->event->flags &= ~flag; 288} 289 290static inline bool trace_probe_is_enabled(struct trace_probe *tp) 291{ 292 return trace_probe_test_flag(tp, TP_FLAG_TRACE | TP_FLAG_PROFILE); 293} 294 295static inline const char *trace_probe_name(struct trace_probe *tp) 296{ 297 return trace_event_name(&tp->event->call); 298} 299 300static inline const char *trace_probe_group_name(struct trace_probe *tp) 301{ 302 return tp->event->call.class->system; 303} 304 305static inline struct trace_event_call * 306 trace_probe_event_call(struct trace_probe *tp) 307{ 308 return &tp->event->call; 309} 310 311static inline struct trace_probe_event * 312trace_probe_event_from_call(struct trace_event_call *event_call) 313{ 314 return container_of(event_call, struct trace_probe_event, call); 315} 316 317static inline struct trace_probe * 318trace_probe_primary_from_call(struct trace_event_call *call) 319{ 320 struct trace_probe_event *tpe = trace_probe_event_from_call(call); 321 322 return list_first_entry_or_null(&tpe->probes, struct trace_probe, list); 323} 324 325static inline struct list_head *trace_probe_probe_list(struct trace_probe *tp) 326{ 327 return &tp->event->probes; 328} 329 330static inline bool trace_probe_has_sibling(struct trace_probe *tp) 331{ 332 struct list_head *list = trace_probe_probe_list(tp); 333 334 return !list_empty(list) && !list_is_singular(list); 335} 336 337static inline int trace_probe_unregister_event_call(struct trace_probe *tp) 338{ 339 /* tp->event is unregistered in trace_remove_event_call() */ 340 return trace_remove_event_call(&tp->event->call); 341} 342 343static inline bool trace_probe_has_single_file(struct trace_probe *tp) 344{ 345 return !!list_is_singular(&tp->event->files); 346} 347 348int trace_probe_init(struct trace_probe *tp, const char *event, 349 const char *group, bool alloc_filter, int nargs); 350void trace_probe_cleanup(struct trace_probe *tp); 351int trace_probe_append(struct trace_probe *tp, struct trace_probe *to); 352void trace_probe_unlink(struct trace_probe *tp); 353int trace_probe_register_event_call(struct trace_probe *tp); 354int trace_probe_add_file(struct trace_probe *tp, struct trace_event_file *file); 355int trace_probe_remove_file(struct trace_probe *tp, 356 struct trace_event_file *file); 357struct event_file_link *trace_probe_get_file_link(struct trace_probe *tp, 358 struct trace_event_file *file); 359int trace_probe_compare_arg_type(struct trace_probe *a, struct trace_probe *b); 360bool trace_probe_match_command_args(struct trace_probe *tp, 361 int argc, const char **argv); 362int trace_probe_create(const char *raw_command, int (*createfn)(int, const char **)); 363int trace_probe_print_args(struct trace_seq *s, struct probe_arg *args, int nr_args, 364 u8 *data, void *field); 365 366#ifdef CONFIG_HAVE_FUNCTION_ARG_ACCESS_API 367int traceprobe_get_entry_data_size(struct trace_probe *tp); 368/* This is a runtime function to store entry data */ 369void store_trace_entry_data(void *edata, struct trace_probe *tp, struct pt_regs *regs); 370#else /* !CONFIG_HAVE_FUNCTION_ARG_ACCESS_API */ 371static inline int traceprobe_get_entry_data_size(struct trace_probe *tp) 372{ 373 return 0; 374} 375#define store_trace_entry_data(edata, tp, regs) do { } while (0) 376#endif 377 378#define trace_probe_for_each_link(pos, tp) \ 379 list_for_each_entry(pos, &(tp)->event->files, list) 380#define trace_probe_for_each_link_rcu(pos, tp) \ 381 list_for_each_entry_rcu(pos, &(tp)->event->files, list) 382 383/* 384 * The flags used for parsing trace_probe arguments. 385 * TPARG_FL_RETURN, TPARG_FL_FENTRY and TPARG_FL_TEVENT are mutually exclusive. 386 * TPARG_FL_KERNEL and TPARG_FL_USER are also mutually exclusive. 387 * TPARG_FL_FPROBE and TPARG_FL_TPOINT are optional but it should be with 388 * TPARG_FL_KERNEL. 389 */ 390#define TPARG_FL_RETURN BIT(0) 391#define TPARG_FL_KERNEL BIT(1) 392#define TPARG_FL_FENTRY BIT(2) 393#define TPARG_FL_TEVENT BIT(3) 394#define TPARG_FL_USER BIT(4) 395#define TPARG_FL_FPROBE BIT(5) 396#define TPARG_FL_TPOINT BIT(6) 397#define TPARG_FL_LOC_MASK GENMASK(4, 0) 398 399static inline bool tparg_is_function_entry(unsigned int flags) 400{ 401 return (flags & TPARG_FL_LOC_MASK) == (TPARG_FL_KERNEL | TPARG_FL_FENTRY); 402} 403 404static inline bool tparg_is_function_return(unsigned int flags) 405{ 406 return (flags & TPARG_FL_LOC_MASK) == (TPARG_FL_KERNEL | TPARG_FL_RETURN); 407} 408 409struct traceprobe_parse_context { 410 struct trace_event_call *event; 411 /* BTF related parameters */ 412 const char *funcname; /* Function name in BTF */ 413 const struct btf_type *proto; /* Prototype of the function */ 414 const struct btf_param *params; /* Parameter of the function */ 415 s32 nr_params; /* The number of the parameters */ 416 struct btf *btf; /* The BTF to be used */ 417 const struct btf_type *last_type; /* Saved type */ 418 u32 last_bitoffs; /* Saved bitoffs */ 419 u32 last_bitsize; /* Saved bitsize */ 420 struct trace_probe *tp; 421 unsigned int flags; 422 int offset; 423}; 424 425extern int traceprobe_parse_probe_arg(struct trace_probe *tp, int i, 426 const char *argv, 427 struct traceprobe_parse_context *ctx); 428const char **traceprobe_expand_meta_args(int argc, const char *argv[], 429 int *new_argc, char *buf, int bufsize, 430 struct traceprobe_parse_context *ctx); 431 432extern int traceprobe_update_arg(struct probe_arg *arg); 433extern void traceprobe_free_probe_arg(struct probe_arg *arg); 434 435/* 436 * If either traceprobe_parse_probe_arg() or traceprobe_expand_meta_args() is called, 437 * this MUST be called for clean up the context and return a resource. 438 */ 439void traceprobe_finish_parse(struct traceprobe_parse_context *ctx); 440 441extern int traceprobe_split_symbol_offset(char *symbol, long *offset); 442int traceprobe_parse_event_name(const char **pevent, const char **pgroup, 443 char *buf, int offset); 444 445enum probe_print_type { 446 PROBE_PRINT_NORMAL, 447 PROBE_PRINT_RETURN, 448 PROBE_PRINT_EVENT, 449}; 450 451extern int traceprobe_set_print_fmt(struct trace_probe *tp, enum probe_print_type ptype); 452 453#ifdef CONFIG_PERF_EVENTS 454extern struct trace_event_call * 455create_local_trace_kprobe(char *func, void *addr, unsigned long offs, 456 bool is_return); 457extern void destroy_local_trace_kprobe(struct trace_event_call *event_call); 458 459extern struct trace_event_call * 460create_local_trace_uprobe(char *name, unsigned long offs, 461 unsigned long ref_ctr_offset, bool is_return); 462extern void destroy_local_trace_uprobe(struct trace_event_call *event_call); 463#endif 464extern int traceprobe_define_arg_fields(struct trace_event_call *event_call, 465 size_t offset, struct trace_probe *tp); 466 467#undef ERRORS 468#define ERRORS \ 469 C(FILE_NOT_FOUND, "Failed to find the given file"), \ 470 C(NO_REGULAR_FILE, "Not a regular file"), \ 471 C(BAD_REFCNT, "Invalid reference counter offset"), \ 472 C(REFCNT_OPEN_BRACE, "Reference counter brace is not closed"), \ 473 C(BAD_REFCNT_SUFFIX, "Reference counter has wrong suffix"), \ 474 C(BAD_UPROBE_OFFS, "Invalid uprobe offset"), \ 475 C(BAD_MAXACT_TYPE, "Maxactive is only for function exit"), \ 476 C(BAD_MAXACT, "Invalid maxactive number"), \ 477 C(MAXACT_TOO_BIG, "Maxactive is too big"), \ 478 C(BAD_PROBE_ADDR, "Invalid probed address or symbol"), \ 479 C(NON_UNIQ_SYMBOL, "The symbol is not unique"), \ 480 C(BAD_RETPROBE, "Retprobe address must be an function entry"), \ 481 C(NO_TRACEPOINT, "Tracepoint is not found"), \ 482 C(BAD_ADDR_SUFFIX, "Invalid probed address suffix"), \ 483 C(NO_GROUP_NAME, "Group name is not specified"), \ 484 C(GROUP_TOO_LONG, "Group name is too long"), \ 485 C(BAD_GROUP_NAME, "Group name must follow the same rules as C identifiers"), \ 486 C(NO_EVENT_NAME, "Event name is not specified"), \ 487 C(EVENT_TOO_LONG, "Event name is too long"), \ 488 C(BAD_EVENT_NAME, "Event name must follow the same rules as C identifiers"), \ 489 C(EVENT_EXIST, "Given group/event name is already used by another event"), \ 490 C(RETVAL_ON_PROBE, "$retval is not available on probe"), \ 491 C(NO_RETVAL, "This function returns 'void' type"), \ 492 C(BAD_STACK_NUM, "Invalid stack number"), \ 493 C(BAD_ARG_NUM, "Invalid argument number"), \ 494 C(BAD_VAR, "Invalid $-valiable specified"), \ 495 C(BAD_REG_NAME, "Invalid register name"), \ 496 C(BAD_MEM_ADDR, "Invalid memory address"), \ 497 C(BAD_IMM, "Invalid immediate value"), \ 498 C(IMMSTR_NO_CLOSE, "String is not closed with '\"'"), \ 499 C(FILE_ON_KPROBE, "File offset is not available with kprobe"), \ 500 C(BAD_FILE_OFFS, "Invalid file offset value"), \ 501 C(SYM_ON_UPROBE, "Symbol is not available with uprobe"), \ 502 C(TOO_MANY_OPS, "Dereference is too much nested"), \ 503 C(DEREF_NEED_BRACE, "Dereference needs a brace"), \ 504 C(BAD_DEREF_OFFS, "Invalid dereference offset"), \ 505 C(DEREF_OPEN_BRACE, "Dereference brace is not closed"), \ 506 C(COMM_CANT_DEREF, "$comm can not be dereferenced"), \ 507 C(BAD_FETCH_ARG, "Invalid fetch argument"), \ 508 C(ARRAY_NO_CLOSE, "Array is not closed"), \ 509 C(BAD_ARRAY_SUFFIX, "Array has wrong suffix"), \ 510 C(BAD_ARRAY_NUM, "Invalid array size"), \ 511 C(ARRAY_TOO_BIG, "Array number is too big"), \ 512 C(BAD_TYPE, "Unknown type is specified"), \ 513 C(BAD_STRING, "String accepts only memory argument"), \ 514 C(BAD_SYMSTRING, "Symbol String doesn't accept data/userdata"), \ 515 C(BAD_BITFIELD, "Invalid bitfield"), \ 516 C(ARG_NAME_TOO_LONG, "Argument name is too long"), \ 517 C(NO_ARG_NAME, "Argument name is not specified"), \ 518 C(BAD_ARG_NAME, "Argument name must follow the same rules as C identifiers"), \ 519 C(USED_ARG_NAME, "This argument name is already used"), \ 520 C(ARG_TOO_LONG, "Argument expression is too long"), \ 521 C(NO_ARG_BODY, "No argument expression"), \ 522 C(BAD_INSN_BNDRY, "Probe point is not an instruction boundary"),\ 523 C(FAIL_REG_PROBE, "Failed to register probe event"),\ 524 C(DIFF_PROBE_TYPE, "Probe type is different from existing probe"),\ 525 C(DIFF_ARG_TYPE, "Argument type or name is different from existing probe"),\ 526 C(SAME_PROBE, "There is already the exact same probe event"),\ 527 C(NO_EVENT_INFO, "This requires both group and event name to attach"),\ 528 C(BAD_ATTACH_EVENT, "Attached event does not exist"),\ 529 C(BAD_ATTACH_ARG, "Attached event does not have this field"),\ 530 C(NO_EP_FILTER, "No filter rule after 'if'"), \ 531 C(NOSUP_BTFARG, "BTF is not available or not supported"), \ 532 C(NO_BTFARG, "This variable is not found at this probe point"),\ 533 C(NO_BTF_ENTRY, "No BTF entry for this probe point"), \ 534 C(BAD_VAR_ARGS, "$arg* must be an independent parameter without name etc."),\ 535 C(NOFENTRY_ARGS, "$arg* can be used only on function entry or exit"), \ 536 C(DOUBLE_ARGS, "$arg* can be used only once in the parameters"), \ 537 C(ARGS_2LONG, "$arg* failed because the argument list is too long"), \ 538 C(ARGIDX_2BIG, "$argN index is too big"), \ 539 C(NO_PTR_STRCT, "This is not a pointer to union/structure."), \ 540 C(NOSUP_DAT_ARG, "Non pointer structure/union argument is not supported."),\ 541 C(BAD_HYPHEN, "Failed to parse single hyphen. Forgot '>'?"), \ 542 C(NO_BTF_FIELD, "This field is not found."), \ 543 C(BAD_BTF_TID, "Failed to get BTF type info."),\ 544 C(BAD_TYPE4STR, "This type does not fit for string."),\ 545 C(NEED_STRING_TYPE, "$comm and immediate-string only accepts string type"), 546 547#undef C 548#define C(a, b) TP_ERR_##a 549 550/* Define TP_ERR_ */ 551enum { ERRORS }; 552 553/* Error text is defined in trace_probe.c */ 554 555struct trace_probe_log { 556 const char *subsystem; 557 const char **argv; 558 int argc; 559 int index; 560}; 561 562void trace_probe_log_init(const char *subsystem, int argc, const char **argv); 563void trace_probe_log_set_index(int index); 564void trace_probe_log_clear(void); 565void __trace_probe_log_err(int offset, int err); 566 567#define trace_probe_log_err(offs, err) \ 568 __trace_probe_log_err(offs, TP_ERR_##err) 569 570struct uprobe_dispatch_data { 571 struct trace_uprobe *tu; 572 unsigned long bp_addr; 573}; 574