^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * trace_export.c - export basic ftrace utilities to user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/stringify.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "trace_output.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* Stub function for events with triggers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int ftrace_event_register(struct trace_event_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) enum trace_reg type, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #undef TRACE_SYSTEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define TRACE_SYSTEM ftrace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * The FTRACE_ENTRY_REG macro allows ftrace entry to define register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * function and thus become accesible via perf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #undef FTRACE_ENTRY_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, regfn) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* not needed for this file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #undef __field_struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define __field_struct(type, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #undef __field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define __field(type, item) type item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #undef __field_fn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define __field_fn(type, item) type item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #undef __field_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define __field_desc(type, container, item) type item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #undef __field_packed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define __field_packed(type, container, item) type item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #undef __array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define __array(type, item, size) type item[size];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #undef __array_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define __array_desc(type, container, item, size) type item[size];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #undef __dynamic_array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define __dynamic_array(type, item) type item[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #undef F_STRUCT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define F_STRUCT(args...) args
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #undef F_printk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define F_printk(fmt, args...) fmt, args
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #undef FTRACE_ENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct ____ftrace_##name { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) tstruct \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static void __always_unused ____ftrace_check_##name(void) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct ____ftrace_##name *__entry = NULL; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* force compile-time check on F_printk() */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) printk(print); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #undef FTRACE_ENTRY_DUP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #include "trace_entries.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #undef __field_ext
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define __field_ext(_type, _item, _filter_type) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .type = #_type, .name = #_item, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .size = sizeof(_type), .align = __alignof__(_type), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) is_signed_type(_type), .filter_type = _filter_type },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #undef __field_ext_packed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define __field_ext_packed(_type, _item, _filter_type) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .type = #_type, .name = #_item, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .size = sizeof(_type), .align = 1, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) is_signed_type(_type), .filter_type = _filter_type },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #undef __field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define __field(_type, _item) __field_ext(_type, _item, FILTER_OTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #undef __field_fn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define __field_fn(_type, _item) __field_ext(_type, _item, FILTER_TRACE_FN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #undef __field_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define __field_desc(_type, _container, _item) __field_ext(_type, _item, FILTER_OTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #undef __field_packed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define __field_packed(_type, _container, _item) __field_ext_packed(_type, _item, FILTER_OTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #undef __array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define __array(_type, _item, _len) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .type = #_type"["__stringify(_len)"]", .name = #_item, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .size = sizeof(_type[_len]), .align = __alignof__(_type), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) is_signed_type(_type), .filter_type = FILTER_OTHER },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #undef __array_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define __array_desc(_type, _container, _item, _len) __array(_type, _item, _len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #undef __dynamic_array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define __dynamic_array(_type, _item) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .type = #_type "[]", .name = #_item, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .size = 0, .align = __alignof__(_type), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) is_signed_type(_type), .filter_type = FILTER_OTHER },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #undef FTRACE_ENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static struct trace_event_fields ftrace_event_fields_##name[] = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) tstruct \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {} };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #include "trace_entries.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #undef __entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define __entry REC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #undef __field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define __field(type, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #undef __field_fn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define __field_fn(type, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #undef __field_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define __field_desc(type, container, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #undef __field_packed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #define __field_packed(type, container, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #undef __array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define __array(type, item, len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #undef __array_desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #define __array_desc(type, container, item, len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #undef __dynamic_array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define __dynamic_array(type, item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #undef F_printk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #undef FTRACE_ENTRY_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, regfn) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static struct trace_event_class __refdata event_class_ftrace_##call = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .system = __stringify(TRACE_SYSTEM), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .fields_array = ftrace_event_fields_##call, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .reg = regfn, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct trace_event_call __used event_##call = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) .class = &event_class_ftrace_##call, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) .name = #call, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .event.type = etype, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .print_fmt = print, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static struct trace_event_call __used \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) __section("_ftrace_events") *__event_##call = &event_##call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #undef FTRACE_ENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) FTRACE_ENTRY_REG(call, struct_name, etype, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) PARAMS(tstruct), PARAMS(print), NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) bool ftrace_event_is_function(struct trace_event_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return call == &event_function;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #include "trace_entries.h"
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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