include/side/trace.h

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright 2022 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  */
   5
   6 #ifndef _SIDE_TRACE_H
   7 #define _SIDE_TRACE_H
   8
   9 #include <stdint.h>
  10 #include <inttypes.h>
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <math.h>
  14 #include <stdbool.h>
  15 #include <side/macros.h>
  16 #include <side/endian.h>
  17
  18 /*
  19  * SIDE stands for "Software Instrumentation Dynamically Enabled"
  20  *
  21  * This is an instrumentation ABI for Linux user-space, which exposes an
  22  * instrumentation type system and facilities allowing a kernel or
  23  * user-space tracer to consume user-space instrumentation.
  24  *
  25  * This instrumentation ABI exposes 3 type systems:
  26  *
  27  * * Stack-copy type system: This is the core type system which can
  28  *   represent all supported types and into which all other type systems
  29  *   can be nested. This type system requires that every type is
  30  *   statically or dynamically declared and then registered, thus giving
  31  *   tracers a complete description of the events and their associated
  32  *   fields before the associated instrumentation is invoked. The
  33  *   application needs to copy each argument (side_arg_...()) onto the
  34  *   stack when calling the instrumentation.
  35  *
  36  *   This is the most expressive of the 3 type systems, althrough not the
  37  *   fastest due to the extra copy of the arguments.
  38  *
  39  * * Data-gathering type system: This type system requires every type to
  40  *   be statically or dynamically declared and registered, but does not
  41  *   require the application to copy its arguments onto the stack.
  42  *   Instead, the type description contains all the required information
  43  *   to fetch the data from the application memory. The only argument
  44  *   required from the instrumentation is the base pointer from which
  45  *   the data should be fetched.
  46  *
  47  *   This type system can be used as an event field, or nested within
  48  *   the stack-copy type system. Nesting of gather-vla within
  49  *   gather-array and gather-vla types is not allowed.
  50  *
  51  *   This type system is has the least overhead of the 3 type systems.
  52  *
  53  * * Dynamic type system: This type system receives both type
  54  *   description and actual data onto the stack at runtime. It has more
  55  *   overhead that the 2 other type systems, but does not require a
  56  *   prior registration of event field description. This makes it useful
  57  *   for seldom used types which are not performance critical, but for
  58  *   which registering each individual events would needlessly grow the
  59  *   number of events to declare and register.
  60  *
  61  *   Another use-case for this type system is for use by dynamically
  62  *   typed language runtimes, where the field type is only known when
  63  *   the instrumentation is called.
  64  *
  65  *   Those dynamic types can be either used as arguments to a variadic
  66  *   field list, or as on-stack instrumentation argument for a static
  67  *   type SIDE_TYPE_DYNAMIC place holder in the stack-copy type system.
  68  *
  69  * The extensibility scheme for the SIDE ABI is as follows:
  70  *
  71  * * Existing field types are never changed nor extended. Field types
  72  *   can be added to the ABI by reserving a label within
  73  *   enum side_type_label.
  74  * * Existing attribute types are never changed nor extended. Attribute
  75  *   types can be added to the ABI by reserving a label within
  76  *   enum side_attr_type.
  77  * * Each union part of the ABI has an explicit side defined by a
  78  *   side_padding() member. Each structure and union have a static
  79  *   assert validating its size.
  80  *
  81  * Handling of unknown types by the tracers:
  82  *
  83  * * A tracer may choose to support only a subset of the types supported
  84  *   by libside. When encountering an unknown or unsupported type, the
  85  *   tracer has the option to either disallow the entire event or skip
  86  *   over the unknown type, both at event registration and when
  87  *   receiving the side_call arguments.
  88  *
  89  * TODO: extend event description with new fields ?
  90  */
  91
  92 //TODO: as those structures will be ABI, we need to either consider them
  93 //fixed forever, or think of a scheme that would allow their binary
  94 //representation to be extended if need be.
  95
  96 struct side_arg;
  97 struct side_arg_vec;
  98 union side_arg_dynamic;
  99 struct side_arg_dynamic_field;
 100 struct side_arg_dynamic_vla;
 101 struct side_type;
 102 struct side_event_field;
 103 struct side_tracer_visitor_ctx;
 104 struct side_tracer_dynamic_struct_visitor_ctx;
 105 struct side_event_description;
 106 struct side_arg_dynamic_struct;
 107 struct side_events_register_handle;
 108 struct side_arg_variant;
 109 struct side_event_state;
 110 struct side_callback;
 111
 112 enum side_type_label {
 113         /* Stack-copy basic types */
 114         SIDE_TYPE_NULL,
 115         SIDE_TYPE_BOOL,
 116         SIDE_TYPE_U8,
 117         SIDE_TYPE_U16,
 118         SIDE_TYPE_U32,
 119         SIDE_TYPE_U64,
 120         SIDE_TYPE_S8,
 121         SIDE_TYPE_S16,
 122         SIDE_TYPE_S32,
 123         SIDE_TYPE_S64,
 124         SIDE_TYPE_BYTE,
 125         SIDE_TYPE_POINTER,
 126         SIDE_TYPE_FLOAT_BINARY16,
 127         SIDE_TYPE_FLOAT_BINARY32,
 128         SIDE_TYPE_FLOAT_BINARY64,
 129         SIDE_TYPE_FLOAT_BINARY128,
 130         SIDE_TYPE_STRING_UTF8,
 131         SIDE_TYPE_STRING_UTF16,
 132         SIDE_TYPE_STRING_UTF32,
 133
 134         /* Stack-copy compound types */
 135         SIDE_TYPE_STRUCT,
 136         SIDE_TYPE_VARIANT,
 137         SIDE_TYPE_ARRAY,
 138         SIDE_TYPE_VLA,
 139         SIDE_TYPE_VLA_VISITOR,
 140
 141         /* Stack-copy enumeration types */
 142         SIDE_TYPE_ENUM,
 143         SIDE_TYPE_ENUM_BITMAP,
 144
 145         /* Stack-copy place holder for dynamic types */
 146         SIDE_TYPE_DYNAMIC,
 147
 148         /* Gather basic types */
 149         SIDE_TYPE_GATHER_BOOL,
 150         SIDE_TYPE_GATHER_INTEGER,
 151         SIDE_TYPE_GATHER_BYTE,
 152         SIDE_TYPE_GATHER_POINTER,
 153         SIDE_TYPE_GATHER_FLOAT,
 154         SIDE_TYPE_GATHER_STRING,
 155
 156         /* Gather compound types */
 157         SIDE_TYPE_GATHER_STRUCT,
 158         SIDE_TYPE_GATHER_ARRAY,
 159         SIDE_TYPE_GATHER_VLA,
 160
 161         /* Gather enumeration types */
 162         SIDE_TYPE_GATHER_ENUM,
 163
 164         /* Dynamic basic types */
 165         SIDE_TYPE_DYNAMIC_NULL,
 166         SIDE_TYPE_DYNAMIC_BOOL,
 167         SIDE_TYPE_DYNAMIC_INTEGER,
 168         SIDE_TYPE_DYNAMIC_BYTE,
 169         SIDE_TYPE_DYNAMIC_POINTER,
 170         SIDE_TYPE_DYNAMIC_FLOAT,
 171         SIDE_TYPE_DYNAMIC_STRING,
 172
 173         /* Dynamic compound types */
 174         SIDE_TYPE_DYNAMIC_STRUCT,
 175         SIDE_TYPE_DYNAMIC_STRUCT_VISITOR,
 176         SIDE_TYPE_DYNAMIC_VLA,
 177         SIDE_TYPE_DYNAMIC_VLA_VISITOR,
 178
 179         _NR_SIDE_TYPE_LABEL,    /* Last entry. */
 180 };
 181
 182 enum side_attr_type {
 183         SIDE_ATTR_TYPE_NULL,
 184         SIDE_ATTR_TYPE_BOOL,
 185         SIDE_ATTR_TYPE_U8,
 186         SIDE_ATTR_TYPE_U16,
 187         SIDE_ATTR_TYPE_U32,
 188         SIDE_ATTR_TYPE_U64,
 189         SIDE_ATTR_TYPE_S8,
 190         SIDE_ATTR_TYPE_S16,
 191         SIDE_ATTR_TYPE_S32,
 192         SIDE_ATTR_TYPE_S64,
 193         SIDE_ATTR_TYPE_FLOAT_BINARY16,
 194         SIDE_ATTR_TYPE_FLOAT_BINARY32,
 195         SIDE_ATTR_TYPE_FLOAT_BINARY64,
 196         SIDE_ATTR_TYPE_FLOAT_BINARY128,
 197         SIDE_ATTR_TYPE_STRING,
 198
 199         _NR_SIDE_ATTR_TYPE,     /* Last entry. */
 200 };
 201
 202 enum side_loglevel {
 203         SIDE_LOGLEVEL_EMERG = 0,
 204         SIDE_LOGLEVEL_ALERT = 1,
 205         SIDE_LOGLEVEL_CRIT = 2,
 206         SIDE_LOGLEVEL_ERR = 3,
 207         SIDE_LOGLEVEL_WARNING = 4,
 208         SIDE_LOGLEVEL_NOTICE = 5,
 209         SIDE_LOGLEVEL_INFO = 6,
 210         SIDE_LOGLEVEL_DEBUG = 7,
 211 };
 212
 213 enum side_visitor_status {
 214         SIDE_VISITOR_STATUS_OK = 0,
 215         SIDE_VISITOR_STATUS_ERROR = -1,
 216 };
 217
 218 enum side_error {
 219         SIDE_ERROR_OK = 0,
 220         SIDE_ERROR_INVAL = 1,
 221         SIDE_ERROR_EXIST = 2,
 222         SIDE_ERROR_NOMEM = 3,
 223         SIDE_ERROR_NOENT = 4,
 224         SIDE_ERROR_EXITING = 5,
 225 };
 226
 227 enum side_type_label_byte_order {
 228         SIDE_TYPE_BYTE_ORDER_LE = 0,
 229         SIDE_TYPE_BYTE_ORDER_BE = 1,
 230 };
 231
 232 #if (SIDE_BYTE_ORDER == SIDE_LITTLE_ENDIAN)
 233 # define SIDE_TYPE_BYTE_ORDER_HOST              SIDE_TYPE_BYTE_ORDER_LE
 234 #else
 235 # define SIDE_TYPE_BYTE_ORDER_HOST              SIDE_TYPE_BYTE_ORDER_BE
 236 #endif
 237
 238 #if (SIDE_FLOAT_WORD_ORDER == SIDE_LITTLE_ENDIAN)
 239 # define SIDE_TYPE_FLOAT_WORD_ORDER_HOST        SIDE_TYPE_BYTE_ORDER_LE
 240 #else
 241 # define SIDE_TYPE_FLOAT_WORD_ORDER_HOST        SIDE_TYPE_BYTE_ORDER_BE
 242 #endif
 243
 244 enum side_type_gather_access_mode {
 245         SIDE_TYPE_GATHER_ACCESS_DIRECT,
 246         SIDE_TYPE_GATHER_ACCESS_POINTER,        /* Pointer dereference */
 247 };
 248
 249 typedef enum side_visitor_status (*side_visitor_func)(
 250                 const struct side_tracer_visitor_ctx *tracer_ctx,
 251                 void *app_ctx);
 252 typedef enum side_visitor_status (*side_dynamic_struct_visitor_func)(
 253                 const struct side_tracer_dynamic_struct_visitor_ctx *tracer_ctx,
 254                 void *app_ctx);
 255 typedef enum side_visitor_status (*side_write_elem_func)(
 256                 const struct side_tracer_visitor_ctx *tracer_ctx,
 257                 const struct side_arg *elem);
 258 typedef enum side_visitor_status (*side_write_field_func)(
 259                 const struct side_tracer_dynamic_struct_visitor_ctx *tracer_ctx,
 260                 const struct side_arg_dynamic_field *dynamic_field);
 261
 262 union side_integer_value {
 263         uint8_t side_u8;
 264         uint16_t side_u16;
 265         uint32_t side_u32;
 266         uint64_t side_u64;
 267         int8_t side_s8;
 268         int16_t side_s16;
 269         int32_t side_s32;
 270         int64_t side_s64;
 271         uintptr_t side_uptr;
 272         side_padding(32);
 273 } SIDE_PACKED;
 274 side_check_size(union side_integer_value, 32);
 275
 276 union side_bool_value {
 277         uint8_t side_bool8;
 278         uint16_t side_bool16;
 279         uint32_t side_bool32;
 280         uint64_t side_bool64;
 281         side_padding(32);
 282 } SIDE_PACKED;
 283 side_check_size(union side_bool_value, 32);
 284
 285 union side_float_value {
 286 #if __HAVE_FLOAT16
 287         _Float16 side_float_binary16;
 288 #endif
 289 #if __HAVE_FLOAT32
 290         _Float32 side_float_binary32;
 291 #endif
 292 #if __HAVE_FLOAT64
 293         _Float64 side_float_binary64;
 294 #endif
 295 #if __HAVE_FLOAT128
 296         _Float128 side_float_binary128;
 297 #endif
 298         side_padding(32);
 299 } SIDE_PACKED;
 300 side_check_size(union side_float_value, 32);
 301
 302 struct side_type_raw_string {
 303         side_ptr_t(const void) p;       /* pointer to string */
 304         uint8_t unit_size;              /* 1, 2, or 4 bytes */
 305         side_enum_t(enum side_type_label_byte_order, uint8_t) byte_order;
 306 } SIDE_PACKED;
 307 side_check_size(struct side_type_raw_string, 18);
 308
 309 struct side_attr_value {
 310         side_enum_t(enum side_attr_type, uint32_t) type;
 311         union {
 312                 uint8_t bool_value;
 313                 struct side_type_raw_string string_value;
 314                 union side_integer_value integer_value;
 315                 union side_float_value float_value;
 316                 side_padding(32);
 317         } SIDE_PACKED u;
 318 };
 319 side_check_size(struct side_attr_value, 36);
 320
 321 /* User attributes. */
 322 struct side_attr {
 323         const struct side_type_raw_string key;
 324         const struct side_attr_value value;
 325 } SIDE_PACKED;
 326 side_check_size(struct side_attr, 54);
 327
 328 /* Type descriptions */
 329 struct side_type_null {
 330         side_ptr_t(const struct side_attr) attr;
 331         uint32_t nr_attr;
 332 } SIDE_PACKED;
 333 side_check_size(struct side_type_null, 20);
 334
 335 struct side_type_bool {
 336         side_ptr_t(const struct side_attr) attr;
 337         uint32_t nr_attr;
 338         uint16_t bool_size;             /* bytes */
 339         uint16_t len_bits;              /* bits. 0 for (bool_size * CHAR_BITS) */
 340         side_enum_t(enum side_type_label_byte_order, uint8_t) byte_order;
 341 } SIDE_PACKED;
 342 side_check_size(struct side_type_bool, 25);
 343
 344 struct side_type_byte {
 345         side_ptr_t(const struct side_attr) attr;
 346         uint32_t nr_attr;
 347 } SIDE_PACKED;
 348 side_check_size(struct side_type_byte, 20);
 349
 350 struct side_type_string {
 351         side_ptr_t(const struct side_attr) attr;
 352         uint32_t nr_attr;
 353         uint8_t unit_size;              /* 1, 2, or 4 bytes */
 354         side_enum_t(enum side_type_label_byte_order, uint8_t) byte_order;
 355 } SIDE_PACKED;
 356 side_check_size(struct side_type_string, 22);
 357
 358 struct side_type_integer {
 359         side_ptr_t(const struct side_attr) attr;
 360         uint32_t nr_attr;
 361         uint16_t integer_size;          /* bytes */
 362         uint16_t len_bits;              /* bits. 0 for (integer_size * CHAR_BITS) */
 363         uint8_t signedness;             /* true/false */
 364         side_enum_t(enum side_type_label_byte_order, uint8_t) byte_order;
 365 } SIDE_PACKED;
 366 side_check_size(struct side_type_integer, 26);
 367
 368 struct side_type_float {
 369         side_ptr_t(const struct side_attr) attr;
 370         uint32_t nr_attr;
 371         uint16_t float_size;            /* bytes */
 372         side_enum_t(enum side_type_label_byte_order, uint8_t) byte_order;
 373 } SIDE_PACKED;
 374 side_check_size(struct side_type_float, 23);
 375
 376 struct side_enum_mapping {
 377         int64_t range_begin;
 378         int64_t range_end;
 379         struct side_type_raw_string label;
 380 } SIDE_PACKED;
 381 side_check_size(struct side_enum_mapping, 16 + sizeof(struct side_type_raw_string));
 382
 383 struct side_enum_mappings {
 384         side_ptr_t(const struct side_enum_mapping) mappings;
 385         side_ptr_t(const struct side_attr) attr;
 386         uint32_t nr_mappings;
 387         uint32_t nr_attr;
 388 } SIDE_PACKED;
 389 side_check_size(struct side_enum_mappings, 40);
 390
 391 struct side_enum_bitmap_mapping {
 392         uint64_t range_begin;
 393         uint64_t range_end;
 394         struct side_type_raw_string label;
 395 } SIDE_PACKED;
 396 side_check_size(struct side_enum_bitmap_mapping, 16 + sizeof(struct side_type_raw_string));
 397
 398 struct side_enum_bitmap_mappings {
 399         side_ptr_t(const struct side_enum_bitmap_mapping) mappings;
 400         side_ptr_t(const struct side_attr) attr;
 401         uint32_t nr_mappings;
 402         uint32_t nr_attr;
 403 } SIDE_PACKED;
 404 side_check_size(struct side_enum_bitmap_mappings, 40);
 405
 406 struct side_type_struct {
 407         side_ptr_t(const struct side_event_field) fields;
 408         side_ptr_t(const struct side_attr) attr;
 409         uint32_t nr_fields;
 410         uint32_t nr_attr;
 411 } SIDE_PACKED;
 412 side_check_size(struct side_type_struct, 40);
 413
 414 struct side_type_array {
 415         side_ptr_t(const struct side_type) elem_type;
 416         side_ptr_t(const struct side_attr) attr;
 417         uint32_t length;
 418         uint32_t nr_attr;
 419 } SIDE_PACKED;
 420 side_check_size(struct side_type_array, 40);
 421
 422 struct side_type_vla {
 423         side_ptr_t(const struct side_type) elem_type;
 424         side_ptr_t(const struct side_attr) attr;
 425         uint32_t nr_attr;
 426 } SIDE_PACKED;
 427 side_check_size(struct side_type_vla, 36);
 428
 429 struct side_type_vla_visitor {
 430         side_ptr_t(const struct side_type) elem_type;
 431         side_func_ptr_t(side_visitor_func) visitor;
 432         side_ptr_t(const struct side_attr) attr;
 433         uint32_t nr_attr;
 434 } SIDE_PACKED;
 435 side_check_size(struct side_type_vla_visitor, 52);
 436
 437 struct side_type_enum {
 438         side_ptr_t(const struct side_enum_mappings) mappings;
 439         side_ptr_t(const struct side_type) elem_type;
 440 } SIDE_PACKED;
 441 side_check_size(struct side_type_enum, 32);
 442
 443 struct side_type_enum_bitmap {
 444         side_ptr_t(const struct side_enum_bitmap_mappings) mappings;
 445         side_ptr_t(const struct side_type) elem_type;
 446 } SIDE_PACKED;
 447 side_check_size(struct side_type_enum_bitmap, 32);
 448
 449 struct side_type_gather_bool {
 450         uint64_t offset;        /* bytes */
 451         uint16_t offset_bits;   /* bits */
 452         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 453         struct side_type_bool type;
 454 } SIDE_PACKED;
 455 side_check_size(struct side_type_gather_bool, 11 + sizeof(struct side_type_bool));
 456
 457 struct side_type_gather_byte {
 458         uint64_t offset;        /* bytes */
 459         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 460         struct side_type_byte type;
 461 } SIDE_PACKED;
 462 side_check_size(struct side_type_gather_byte, 9 + sizeof(struct side_type_byte));
 463
 464 struct side_type_gather_integer {
 465         uint64_t offset;        /* bytes */
 466         uint16_t offset_bits;   /* bits */
 467         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 468         struct side_type_integer type;
 469 } SIDE_PACKED;
 470 side_check_size(struct side_type_gather_integer, 11 + sizeof(struct side_type_integer));
 471
 472 struct side_type_gather_float {
 473         uint64_t offset;        /* bytes */
 474         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 475         struct side_type_float type;
 476 } SIDE_PACKED;
 477 side_check_size(struct side_type_gather_float, 9 + sizeof(struct side_type_float));
 478
 479 struct side_type_gather_string {
 480         uint64_t offset;        /* bytes */
 481         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 482         struct side_type_string type;
 483 } SIDE_PACKED;
 484 side_check_size(struct side_type_gather_string, 9 + sizeof(struct side_type_string));
 485
 486 struct side_type_gather_enum {
 487         side_ptr_t(const struct side_enum_mappings) mappings;
 488         side_ptr_t(const struct side_type) elem_type;
 489 } SIDE_PACKED;
 490 side_check_size(struct side_type_gather_enum, 32);
 491
 492 struct side_type_gather_struct {
 493         side_ptr_t(const struct side_type_struct) type;
 494         uint64_t offset;        /* bytes */
 495         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 496         uint32_t size;          /* bytes */
 497 } SIDE_PACKED;
 498 side_check_size(struct side_type_gather_struct, 29);
 499
 500 struct side_type_gather_array {
 501         uint64_t offset;        /* bytes */
 502         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 503         struct side_type_array type;
 504 } SIDE_PACKED;
 505 side_check_size(struct side_type_gather_array, 9 + sizeof(struct side_type_array));
 506
 507 struct side_type_gather_vla {
 508         side_ptr_t(const struct side_type) length_type; /* side_length() */
 509         uint64_t offset;        /* bytes */
 510         uint8_t access_mode;    /* enum side_type_gather_access_mode */
 511         struct side_type_vla type;
 512 } SIDE_PACKED;
 513 side_check_size(struct side_type_gather_vla, 25 + sizeof(struct side_type_vla));
 514
 515 struct side_type_gather {
 516         union {
 517                 struct side_type_gather_bool side_bool;
 518                 struct side_type_gather_byte side_byte;
 519                 struct side_type_gather_integer side_integer;
 520                 struct side_type_gather_float side_float;
 521                 struct side_type_gather_string side_string;
 522                 struct side_type_gather_enum side_enum;
 523                 struct side_type_gather_array side_array;
 524                 struct side_type_gather_vla side_vla;
 525                 struct side_type_gather_struct side_struct;
 526                 side_padding(61);
 527         } SIDE_PACKED u;
 528 } SIDE_PACKED;
 529 side_check_size(struct side_type_gather, 61);
 530
 531 struct side_type {
 532         side_enum_t(enum side_type_label, uint16_t) type;
 533         union {
 534                 /* Stack-copy basic types */
 535                 struct side_type_null side_null;
 536                 struct side_type_bool side_bool;
 537                 struct side_type_byte side_byte;
 538                 struct side_type_string side_string;
 539                 struct side_type_integer side_integer;
 540                 struct side_type_float side_float;
 541
 542                 /* Stack-copy compound types */
 543                 struct side_type_array side_array;
 544                 struct side_type_vla side_vla;
 545                 struct side_type_vla_visitor side_vla_visitor;
 546                 side_ptr_t(const struct side_type_struct) side_struct;
 547                 side_ptr_t(const struct side_type_variant) side_variant;
 548
 549                 /* Stack-copy enumeration types */
 550                 struct side_type_enum side_enum;
 551                 struct side_type_enum_bitmap side_enum_bitmap;
 552
 553                 /* Gather types */
 554                 struct side_type_gather side_gather;
 555                 side_padding(62);
 556         } SIDE_PACKED u;
 557 } SIDE_PACKED;
 558 side_check_size(struct side_type, 64);
 559
 560 struct side_variant_option {
 561         int64_t range_begin;
 562         int64_t range_end;
 563         const struct side_type side_type;
 564 } SIDE_PACKED;
 565 side_check_size(struct side_variant_option, 16 + sizeof(const struct side_type));
 566
 567 struct side_type_variant {
 568         side_ptr_t(const struct side_variant_option) options;
 569         side_ptr_t(const struct side_attr) attr;
 570         uint32_t nr_options;
 571         uint32_t nr_attr;
 572         const struct side_type selector;
 573 } SIDE_PACKED;
 574 side_check_size(struct side_type_variant, 40 + sizeof(const struct side_type));
 575
 576 struct side_event_field {
 577         side_ptr_t(const char) field_name;
 578         struct side_type side_type;
 579 } SIDE_PACKED;
 580 side_check_size(struct side_event_field, 16 + sizeof(struct side_type));
 581
 582 enum side_event_flags {
 583         SIDE_EVENT_FLAG_VARIADIC = (1 << 0),
 584 };
 585
 586 union side_arg_static {
 587         /* Stack-copy basic types */
 588         union side_bool_value bool_value;
 589         uint8_t byte_value;
 590         side_ptr_t(const void) string_value;    /* const {uint8_t, uint16_t, uint32_t} * */
 591         union side_integer_value integer_value;
 592         union side_float_value float_value;
 593
 594         /* Stack-copy compound types */
 595         side_ptr_t(const struct side_arg_vec) side_struct;
 596         side_ptr_t(const struct side_arg_variant) side_variant;
 597         side_ptr_t(const struct side_arg_vec) side_array;
 598         side_ptr_t(const struct side_arg_vec) side_vla;
 599         void *side_vla_app_visitor_ctx;
 600
 601         /* Gather basic types */
 602         side_ptr_t(const void) side_bool_gather_ptr;
 603         side_ptr_t(const void) side_byte_gather_ptr;
 604         side_ptr_t(const void) side_integer_gather_ptr;
 605         side_ptr_t(const void) side_float_gather_ptr;
 606         side_ptr_t(const void) side_string_gather_ptr;
 607
 608         /* Gather compound types */
 609         side_ptr_t(const void) side_array_gather_ptr;
 610         side_ptr_t(const void) side_struct_gather_ptr;
 611         struct {
 612                 side_ptr_t(const void) ptr;
 613                 side_ptr_t(const void) length_ptr;
 614         } SIDE_PACKED side_vla_gather;
 615         side_padding(32);
 616 } SIDE_PACKED;
 617 side_check_size(union side_arg_static, 32);
 618
 619 struct side_arg_dynamic_vla {
 620         side_ptr_t(const struct side_arg) sav;
 621         side_ptr_t(const struct side_attr) attr;
 622         uint32_t len;
 623         uint32_t nr_attr;
 624 } SIDE_PACKED;
 625 side_check_size(struct side_arg_dynamic_vla, 40);
 626
 627 struct side_arg_dynamic_struct {
 628         side_ptr_t(const struct side_arg_dynamic_field) fields;
 629         side_ptr_t(const struct side_attr) attr;
 630         uint32_t len;
 631         uint32_t nr_attr;
 632 } SIDE_PACKED;
 633 side_check_size(struct side_arg_dynamic_struct, 40);
 634
 635 struct side_dynamic_struct_visitor {
 636         side_func_ptr_t(side_dynamic_struct_visitor_func) visitor;
 637         side_ptr_t(void) app_ctx;
 638         side_ptr_t(const struct side_attr) attr;
 639         uint32_t nr_attr;
 640 } SIDE_PACKED;
 641 side_check_size(struct side_dynamic_struct_visitor, 52);
 642
 643 struct side_dynamic_vla_visitor {
 644         side_func_ptr_t(side_visitor_func) visitor;
 645         side_ptr_t(void) app_ctx;
 646         side_ptr_t(const struct side_attr) attr;
 647         uint32_t nr_attr;
 648 } SIDE_PACKED;
 649 side_check_size(struct side_dynamic_vla_visitor, 52);
 650
 651 union side_arg_dynamic {
 652         /* Dynamic basic types */
 653         struct side_type_null side_null;
 654         struct {
 655                 struct side_type_bool type;
 656                 union side_bool_value value;
 657         } SIDE_PACKED side_bool;
 658         struct {
 659                 struct side_type_byte type;
 660                 uint8_t value;
 661         } SIDE_PACKED side_byte;
 662         struct {
 663                 struct side_type_string type;
 664                 uint64_t value; /* const char * */
 665         } SIDE_PACKED side_string;
 666         struct {
 667                 struct side_type_integer type;
 668                 union side_integer_value value;
 669         } SIDE_PACKED side_integer;
 670         struct {
 671                 struct side_type_float type;
 672                 union side_float_value value;
 673         } SIDE_PACKED side_float;
 674
 675         /* Dynamic compound types */
 676         side_ptr_t(const struct side_arg_dynamic_struct) side_dynamic_struct;
 677         side_ptr_t(const struct side_arg_dynamic_vla) side_dynamic_vla;
 678
 679         struct side_dynamic_struct_visitor side_dynamic_struct_visitor;
 680         struct side_dynamic_vla_visitor side_dynamic_vla_visitor;
 681
 682         side_padding(58);
 683 } SIDE_PACKED;
 684 side_check_size(union side_arg_dynamic, 58);
 685
 686 struct side_arg {
 687         side_enum_t(enum side_type_label, uint16_t) type;
 688         union {
 689                 union side_arg_static side_static;
 690                 union side_arg_dynamic side_dynamic;
 691                 side_padding(62);
 692         } SIDE_PACKED u;
 693 } SIDE_PACKED;
 694 side_check_size(struct side_arg, 64);
 695
 696 struct side_arg_variant {
 697         struct side_arg selector;
 698         struct side_arg option;
 699 } SIDE_PACKED;
 700 side_check_size(struct side_arg_variant, 128);
 701
 702 struct side_arg_vec {
 703         side_ptr_t(const struct side_arg) sav;
 704         uint32_t len;
 705 } SIDE_PACKED;
 706 side_check_size(struct side_arg_vec, 20);
 707
 708 struct side_arg_dynamic_field {
 709         side_ptr_t(const char) field_name;
 710         const struct side_arg elem;
 711 } SIDE_PACKED;
 712 side_check_size(struct side_arg_dynamic_field, 16 + sizeof(const struct side_arg));
 713
 714 struct side_event_description {
 715         side_ptr_t(struct side_event_state) state;
 716         side_ptr_t(const char) provider_name;
 717         side_ptr_t(const char) event_name;
 718         side_ptr_t(const struct side_event_field) fields;
 719         side_ptr_t(const struct side_attr) attr;
 720         uint64_t flags;
 721         uint32_t version;
 722         uint16_t nr_side_type_label;
 723         uint16_t nr_side_attr_type;
 724         side_enum_t(enum side_loglevel, uint32_t) loglevel;
 725         uint32_t nr_fields;
 726         uint32_t nr_attr;
 727         uint32_t nr_callbacks;
 728 } SIDE_PACKED;
 729
 730 /*
 731  * This structure is _not_ packed to allow atomic operations on its
 732  * fields.
 733  */
 734 struct side_event_state {
 735         uintptr_t enabled;
 736         const struct side_callback *callbacks;
 737         struct side_event_description *desc;
 738 };
 739
 740 /* Event and type attributes */
 741
 742 #define side_attr(_key, _value) \
 743         { \
 744                 .key = { \
 745                         .p = SIDE_PTR_INIT(_key), \
 746                         .unit_size = sizeof(uint8_t), \
 747                         .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 748                 }, \
 749                 .value = SIDE_PARAM(_value), \
 750         }
 751
 752 #define side_attr_list(...) \
 753         SIDE_COMPOUND_LITERAL(const struct side_attr, __VA_ARGS__)
 754
 755 #define side_attr_null(_val)            { .type = SIDE_ATTR_TYPE_NULL }
 756 #define side_attr_bool(_val)            { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_BOOL), .u = { .bool_value = !!(_val) } }
 757 #define side_attr_u8(_val)              { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_U8), .u = { .integer_value = { .side_u8 = (_val) } } }
 758 #define side_attr_u16(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_U16), .u = { .integer_value = { .side_u16 = (_val) } } }
 759 #define side_attr_u32(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_U32), .u = { .integer_value = { .side_u32 = (_val) } } }
 760 #define side_attr_u64(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_U64), .u = { .integer_value = { .side_u64 = (_val) } } }
 761 #define side_attr_s8(_val)              { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_S8), .u = { .integer_value = { .side_s8 = (_val) } } }
 762 #define side_attr_s16(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_S16), .u = { .integer_value = { .side_s16 = (_val) } } }
 763 #define side_attr_s32(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_S32), .u = { .integer_value = { .side_s32 = (_val) } } }
 764 #define side_attr_s64(_val)             { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_S64), .u = { .integer_value = { .side_s64 = (_val) } } }
 765 #define side_attr_float_binary16(_val)  { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_FLOAT_BINARY16), .u = { .float_value = { .side_float_binary16 = (_val) } } }
 766 #define side_attr_float_binary32(_val)  { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_FLOAT_BINARY32), .u = { .float_value = { .side_float_binary32 = (_val) } } }
 767 #define side_attr_float_binary64(_val)  { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_FLOAT_BINARY64), .u = { .float_value = { .side_float_binary64 = (_val) } } }
 768 #define side_attr_float_binary128(_val) { .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_FLOAT_BINARY128), .u = { .float_value = { .side_float_binary128 = (_val) } } }
 769
 770 #define _side_attr_string(_val, _byte_order, _unit_size) \
 771         { \
 772                 .type = SIDE_ENUM_INIT(SIDE_ATTR_TYPE_STRING), \
 773                 .u = { \
 774                         .string_value = { \
 775                                 .p = SIDE_PTR_INIT(_val), \
 776                                 .unit_size = _unit_size, \
 777                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
 778                         }, \
 779                 }, \
 780         }
 781
 782 #define side_attr_string(_val)          _side_attr_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t))
 783 #define side_attr_string16(_val)        _side_attr_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint16_t))
 784 #define side_attr_string32(_val)        _side_attr_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint32_t))
 785
 786 /* Stack-copy enumeration type definitions */
 787
 788 #define side_define_enum(_identifier, _mappings, _attr...) \
 789         const struct side_enum_mappings _identifier = { \
 790                 .mappings = SIDE_PTR_INIT(_mappings), \
 791                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 792                 .nr_mappings = SIDE_ARRAY_SIZE(SIDE_PARAM(_mappings)), \
 793                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 794         }
 795
 796 #define side_enum_mapping_list(...) \
 797         SIDE_COMPOUND_LITERAL(const struct side_enum_mapping, __VA_ARGS__)
 798
 799 #define side_enum_mapping_range(_label, _begin, _end) \
 800         { \
 801                 .range_begin = _begin, \
 802                 .range_end = _end, \
 803                 .label = { \
 804                         .p = SIDE_PTR_INIT(_label), \
 805                         .unit_size = sizeof(uint8_t), \
 806                         .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 807                 }, \
 808         }
 809
 810 #define side_enum_mapping_value(_label, _value) \
 811         { \
 812                 .range_begin = _value, \
 813                 .range_end = _value, \
 814                 .label = { \
 815                         .p = SIDE_PTR_INIT(_label), \
 816                         .unit_size = sizeof(uint8_t), \
 817                         .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 818                 }, \
 819         }
 820
 821 #define side_define_enum_bitmap(_identifier, _mappings, _attr...) \
 822         const struct side_enum_bitmap_mappings _identifier = { \
 823                 .mappings = SIDE_PTR_INIT(_mappings), \
 824                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 825                 .nr_mappings = SIDE_ARRAY_SIZE(SIDE_PARAM(_mappings)), \
 826                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 827         }
 828
 829 #define side_enum_bitmap_mapping_list(...) \
 830         SIDE_COMPOUND_LITERAL(const struct side_enum_bitmap_mapping, __VA_ARGS__)
 831
 832 #define side_enum_bitmap_mapping_range(_label, _begin, _end) \
 833         { \
 834                 .range_begin = _begin, \
 835                 .range_end = _end, \
 836                 .label = { \
 837                         .p = SIDE_PTR_INIT(_label), \
 838                         .unit_size = sizeof(uint8_t), \
 839                         .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 840                 }, \
 841         }
 842
 843 #define side_enum_bitmap_mapping_value(_label, _value) \
 844         { \
 845                 .range_begin = _value, \
 846                 .range_end = _value, \
 847                 .label = { \
 848                         .p = SIDE_PTR_INIT(_label), \
 849                         .unit_size = sizeof(uint8_t), \
 850                         .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 851                 }, \
 852         }
 853
 854 /* Stack-copy field and type definitions */
 855
 856 #define side_type_null(_attr...) \
 857         { \
 858                 .type = SIDE_ENUM_INIT(SIDE_TYPE_NULL), \
 859                 .u = { \
 860                         .side_null = { \
 861                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 862                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 863                         }, \
 864                 }, \
 865         }
 866
 867 #define side_type_bool(_attr...) \
 868         { \
 869                 .type = SIDE_ENUM_INIT(SIDE_TYPE_BOOL), \
 870                 .u = { \
 871                         .side_bool = { \
 872                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 873                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 874                                 .bool_size = sizeof(uint8_t), \
 875                                 .len_bits = 0, \
 876                                 .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
 877                         }, \
 878                 }, \
 879         }
 880
 881 #define side_type_byte(_attr...) \
 882         { \
 883                 .type = SIDE_ENUM_INIT(SIDE_TYPE_BYTE), \
 884                 .u = { \
 885                         .side_byte = { \
 886                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 887                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
 888                         }, \
 889                 }, \
 890         }
 891
 892 #define _side_type_string(_type, _byte_order, _unit_size, _attr) \
 893         { \
 894                 .type = SIDE_ENUM_INIT(_type), \
 895                 .u = { \
 896                         .side_string = { \
 897                                 .attr = SIDE_PTR_INIT(_attr), \
 898                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM(_attr)), \
 899                                 .unit_size = _unit_size, \
 900                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
 901                         }, \
 902                 }, \
 903         }
 904
 905 #define side_type_dynamic() \
 906         { \
 907                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC), \
 908         }
 909
 910 #define _side_type_integer(_type, _signedness, _byte_order, _integer_size, _len_bits, _attr) \
 911         { \
 912                 .type = SIDE_ENUM_INIT(_type), \
 913                 .u = { \
 914                         .side_integer = { \
 915                                 .attr = SIDE_PTR_INIT(_attr), \
 916                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM(_attr)), \
 917                                 .integer_size = _integer_size, \
 918                                 .len_bits = _len_bits, \
 919                                 .signedness = _signedness, \
 920                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
 921                         }, \
 922                 }, \
 923         }
 924
 925 #define _side_type_float(_type, _byte_order, _float_size, _attr) \
 926         { \
 927                 .type = SIDE_ENUM_INIT(_type), \
 928                 .u = { \
 929                         .side_float = { \
 930                                 .attr = SIDE_PTR_INIT(_attr), \
 931                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM(_attr)), \
 932                                 .float_size = _float_size, \
 933                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
 934                         }, \
 935                 }, \
 936         }
 937
 938 #define _side_field(_name, _type) \
 939         { \
 940                 .field_name = SIDE_PTR_INIT(_name), \
 941                 .side_type = _type, \
 942         }
 943
 944 #define side_option_range(_range_begin, _range_end, _type) \
 945         { \
 946                 .range_begin = _range_begin, \
 947                 .range_end = _range_end, \
 948                 .side_type = _type, \
 949         }
 950
 951 #define side_option(_value, _type) \
 952         side_option_range(_value, _value, SIDE_PARAM(_type))
 953
 954 /* Host endian */
 955 #define side_type_u8(_attr...)                          _side_type_integer(SIDE_TYPE_U8, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 956 #define side_type_u16(_attr...)                         _side_type_integer(SIDE_TYPE_U16, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 957 #define side_type_u32(_attr...)                         _side_type_integer(SIDE_TYPE_U32, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 958 #define side_type_u64(_attr...)                         _side_type_integer(SIDE_TYPE_U64, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 959 #define side_type_s8(_attr...)                          _side_type_integer(SIDE_TYPE_S8, true, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(int8_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 960 #define side_type_s16(_attr...)                         _side_type_integer(SIDE_TYPE_S16, true, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(int16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 961 #define side_type_s32(_attr...)                         _side_type_integer(SIDE_TYPE_S32, true, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(int32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 962 #define side_type_s64(_attr...)                         _side_type_integer(SIDE_TYPE_S64, true, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(int64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 963 #define side_type_pointer(_attr...)                     _side_type_integer(SIDE_TYPE_POINTER, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uintptr_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 964 #define side_type_float_binary16(_attr...)              _side_type_float(SIDE_TYPE_FLOAT_BINARY16, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, sizeof(_Float16), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 965 #define side_type_float_binary32(_attr...)              _side_type_float(SIDE_TYPE_FLOAT_BINARY32, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, sizeof(_Float32), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 966 #define side_type_float_binary64(_attr...)              _side_type_float(SIDE_TYPE_FLOAT_BINARY64, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, sizeof(_Float64), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 967 #define side_type_float_binary128(_attr...)             _side_type_float(SIDE_TYPE_FLOAT_BINARY128, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, sizeof(_Float128), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 968 #define side_type_string(_attr...)                      _side_type_string(SIDE_TYPE_STRING_UTF8, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 969 #define side_type_string16(_attr...)                    _side_type_string(SIDE_TYPE_STRING_UTF16, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 970 #define side_type_string32(_attr...)                    _side_type_string(SIDE_TYPE_STRING_UTF32, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 971
 972 #define side_field_null(_name, _attr...)                _side_field(_name, side_type_null(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 973 #define side_field_bool(_name, _attr...)                _side_field(_name, side_type_bool(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 974 #define side_field_u8(_name, _attr...)                  _side_field(_name, side_type_u8(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 975 #define side_field_u16(_name, _attr...)                 _side_field(_name, side_type_u16(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 976 #define side_field_u32(_name, _attr...)                 _side_field(_name, side_type_u32(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 977 #define side_field_u64(_name, _attr...)                 _side_field(_name, side_type_u64(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 978 #define side_field_s8(_name, _attr...)                  _side_field(_name, side_type_s8(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 979 #define side_field_s16(_name, _attr...)                 _side_field(_name, side_type_s16(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 980 #define side_field_s32(_name, _attr...)                 _side_field(_name, side_type_s32(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 981 #define side_field_s64(_name, _attr...)                 _side_field(_name, side_type_s64(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 982 #define side_field_byte(_name, _attr...)                _side_field(_name, side_type_byte(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 983 #define side_field_pointer(_name, _attr...)             _side_field(_name, side_type_pointer(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 984 #define side_field_float_binary16(_name, _attr...)      _side_field(_name, side_type_float_binary16(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 985 #define side_field_float_binary32(_name, _attr...)      _side_field(_name, side_type_float_binary32(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 986 #define side_field_float_binary64(_name, _attr...)      _side_field(_name, side_type_float_binary64(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 987 #define side_field_float_binary128(_name, _attr...)     _side_field(_name, side_type_float_binary128(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 988 #define side_field_string(_name, _attr...)              _side_field(_name, side_type_string(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 989 #define side_field_string16(_name, _attr...)            _side_field(_name, side_type_string16(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 990 #define side_field_string32(_name, _attr...)            _side_field(_name, side_type_string32(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
 991 #define side_field_dynamic(_name)                       _side_field(_name, side_type_dynamic())
 992
 993 /* Little endian */
 994 #define side_type_u16_le(_attr...)                      _side_type_integer(SIDE_TYPE_U16, false, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 995 #define side_type_u32_le(_attr...)                      _side_type_integer(SIDE_TYPE_U32, false, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 996 #define side_type_u64_le(_attr...)                      _side_type_integer(SIDE_TYPE_U64, false, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 997 #define side_type_s16_le(_attr...)                      _side_type_integer(SIDE_TYPE_S16, true, SIDE_TYPE_BYTE_ORDER_LE, sizeof(int16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 998 #define side_type_s32_le(_attr...)                      _side_type_integer(SIDE_TYPE_S32, true, SIDE_TYPE_BYTE_ORDER_LE, sizeof(int32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
 999 #define side_type_s64_le(_attr...)                      _side_type_integer(SIDE_TYPE_S64, true, SIDE_TYPE_BYTE_ORDER_LE, sizeof(int64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1000 #define side_type_pointer_le(_attr...)                  _side_type_integer(SIDE_TYPE_POINTER, false, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uintptr_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1001 #define side_type_float_binary16_le(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY16, SIDE_TYPE_BYTE_ORDER_LE, sizeof(_Float16), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1002 #define side_type_float_binary32_le(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY32, SIDE_TYPE_BYTE_ORDER_LE, sizeof(_Float32), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1003 #define side_type_float_binary64_le(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY64, SIDE_TYPE_BYTE_ORDER_LE, sizeof(_Float64), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1004 #define side_type_float_binary128_le(_attr...)          _side_type_float(SIDE_TYPE_FLOAT_BINARY128, SIDE_TYPE_BYTE_ORDER_LE, sizeof(_Float128), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1005 #define side_type_string16_le(_attr...)                 _side_type_string(SIDE_TYPE_STRING_UTF16, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1006 #define side_type_string32_le(_attr...)                 _side_type_string(SIDE_TYPE_STRING_UTF32, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1007
1008 #define side_field_u16_le(_name, _attr...)              _side_field(_name, side_type_u16_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1009 #define side_field_u32_le(_name, _attr...)              _side_field(_name, side_type_u32_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1010 #define side_field_u64_le(_name, _attr...)              _side_field(_name, side_type_u64_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1011 #define side_field_s16_le(_name, _attr...)              _side_field(_name, side_type_s16_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1012 #define side_field_s32_le(_name, _attr...)              _side_field(_name, side_type_s32_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1013 #define side_field_s64_le(_name, _attr...)              _side_field(_name, side_type_s64_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1014 #define side_field_pointer_le(_name, _attr...)          _side_field(_name, side_type_pointer_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1015 #define side_field_float_binary16_le(_name, _attr...)   _side_field(_name, side_type_float_binary16_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1016 #define side_field_float_binary32_le(_name, _attr...)   _side_field(_name, side_type_float_binary32_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1017 #define side_field_float_binary64_le(_name, _attr...)   _side_field(_name, side_type_float_binary64_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1018 #define side_field_float_binary128_le(_name, _attr...)  _side_field(_name, side_type_float_binary128_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1019 #define side_field_string16_le(_name, _attr...)         _side_field(_name, side_type_string16_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1020 #define side_field_string32_le(_name, _attr...)         _side_field(_name, side_type_string32_le(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1021
1022 /* Big endian */
1023 #define side_type_u16_be(_attr...)                      _side_type_integer(SIDE_TYPE_U16, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1024 #define side_type_u32_be(_attr...)                      _side_type_integer(SIDE_TYPE_U32, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1025 #define side_type_u64_be(_attr...)                      _side_type_integer(SIDE_TYPE_U64, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1026 #define side_type_s16_be(_attr...)                      _side_type_integer(SIDE_TYPE_S16, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(int16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1027 #define side_type_s32_be(_attr...)                      _side_type_integer(SIDE_TYPE_S32, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(int32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1028 #define side_type_s64_be(_attr...)                      _side_type_integer(SIDE_TYPE_S64, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(int64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1029 #define side_type_pointer_be(_attr...)                  _side_type_integer(SIDE_TYPE_POINTER, false, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uintptr_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1030 #define side_type_float_binary16_be(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY16, SIDE_TYPE_BYTE_ORDER_BE, sizeof(_Float16), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1031 #define side_type_float_binary32_be(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY32, SIDE_TYPE_BYTE_ORDER_BE, sizeof(_Float32), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1032 #define side_type_float_binary64_be(_attr...)           _side_type_float(SIDE_TYPE_FLOAT_BINARY64, SIDE_TYPE_BYTE_ORDER_BE, sizeof(_Float64), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1033 #define side_type_float_binary128_be(_attr...)          _side_type_float(SIDE_TYPE_FLOAT_BINARY128, SIDE_TYPE_BYTE_ORDER_BE, sizeof(_Float128), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1034 #define side_type_string16_be(_attr...)                 _side_type_string(SIDE_TYPE_STRING_UTF16, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1035 #define side_type_string32_be(_attr...)                 _side_type_string(SIDE_TYPE_STRING_UTF32, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1036
1037 #define side_field_u16_be(_name, _attr...)              _side_field(_name, side_type_u16_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1038 #define side_field_u32_be(_name, _attr...)              _side_field(_name, side_type_u32_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1039 #define side_field_u64_be(_name, _attr...)              _side_field(_name, side_type_u64_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1040 #define side_field_s16_be(_name, _attr...)              _side_field(_name, side_type_s16_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1041 #define side_field_s32_be(_name, _attr...)              _side_field(_name, side_type_s32_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1042 #define side_field_s64_be(_name, _attr...)              _side_field(_name, side_type_s64_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1043 #define side_field_pointer_be(_name, _attr...)          _side_field(_name, side_type_pointer_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1044 #define side_field_float_binary16_be(_name, _attr...)   _side_field(_name, side_type_float_binary16_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1045 #define side_field_float_binary32_be(_name, _attr...)   _side_field(_name, side_type_float_binary32_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1046 #define side_field_float_binary64_be(_name, _attr...)   _side_field(_name, side_type_float_binary64_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1047 #define side_field_float_binary128_be(_name, _attr...)  _side_field(_name, side_type_float_binary128_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1048 #define side_field_string16_be(_name, _attr...)         _side_field(_name, side_type_string16_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1049 #define side_field_string32_be(_name, _attr...)         _side_field(_name, side_type_string32_be(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1050
1051 #define side_type_enum(_mappings, _elem_type) \
1052         { \
1053                 .type = SIDE_ENUM_INIT(SIDE_TYPE_ENUM), \
1054                 .u = { \
1055                         .side_enum = { \
1056                                 .mappings = SIDE_PTR_INIT(_mappings), \
1057                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1058                         }, \
1059                 }, \
1060         }
1061 #define side_field_enum(_name, _mappings, _elem_type) \
1062         _side_field(_name, side_type_enum(SIDE_PARAM(_mappings), SIDE_PARAM(_elem_type)))
1063
1064 #define side_type_enum_bitmap(_mappings, _elem_type) \
1065         { \
1066                 .type = SIDE_ENUM_INIT(SIDE_TYPE_ENUM_BITMAP), \
1067                 .u = { \
1068                         .side_enum_bitmap = { \
1069                                 .mappings = SIDE_PTR_INIT(_mappings), \
1070                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1071                         }, \
1072                 }, \
1073         }
1074 #define side_field_enum_bitmap(_name, _mappings, _elem_type) \
1075         _side_field(_name, side_type_enum_bitmap(SIDE_PARAM(_mappings), SIDE_PARAM(_elem_type)))
1076
1077 #define side_type_struct(_struct) \
1078         { \
1079                 .type = SIDE_ENUM_INIT(SIDE_TYPE_STRUCT), \
1080                 .u = { \
1081                         .side_struct = SIDE_PTR_INIT(_struct), \
1082                 }, \
1083         }
1084 #define side_field_struct(_name, _struct) \
1085         _side_field(_name, side_type_struct(SIDE_PARAM(_struct)))
1086
1087 #define _side_type_struct_define(_fields, _attr) \
1088         { \
1089                 .fields = SIDE_PTR_INIT(_fields), \
1090                 .attr = SIDE_PTR_INIT(_attr), \
1091                 .nr_fields = SIDE_ARRAY_SIZE(SIDE_PARAM(_fields)), \
1092                 .nr_attr  = SIDE_ARRAY_SIZE(SIDE_PARAM(_attr)), \
1093         }
1094
1095 #define side_define_struct(_identifier, _fields, _attr...) \
1096         const struct side_type_struct _identifier = _side_type_struct_define(SIDE_PARAM(_fields), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1097
1098 #define side_struct_literal(_fields, _attr...) \
1099         SIDE_COMPOUND_LITERAL(const struct side_type_struct, \
1100                 _side_type_struct_define(SIDE_PARAM(_fields), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1101
1102 #define side_type_variant(_variant) \
1103         { \
1104                 .type = SIDE_ENUM_INIT(SIDE_TYPE_VARIANT), \
1105                 .u = { \
1106                         .side_variant = SIDE_PTR_INIT(_variant), \
1107                 }, \
1108         }
1109 #define side_field_variant(_name, _variant) \
1110         _side_field(_name, side_type_variant(SIDE_PARAM(_variant)))
1111
1112 #define _side_type_variant_define(_selector, _options, _attr) \
1113         { \
1114                 .selector = _selector, \
1115                 .options = SIDE_PTR_INIT(_options), \
1116                 .attr = SIDE_PTR_INIT(_attr), \
1117                 .nr_options = SIDE_ARRAY_SIZE(SIDE_PARAM(_options)), \
1118                 .nr_attr  = SIDE_ARRAY_SIZE(SIDE_PARAM(_attr)), \
1119         }
1120
1121 #define side_define_variant(_identifier, _selector, _options, _attr...) \
1122         const struct side_type_variant _identifier = \
1123                 _side_type_variant_define(SIDE_PARAM(_selector), SIDE_PARAM(_options), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1124
1125 #define side_variant_literal(_selector, _options, _attr...) \
1126         SIDE_COMPOUND_LITERAL(const struct side_type_variant, \
1127                 _side_type_variant_define(SIDE_PARAM(_selector), SIDE_PARAM(_options), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1128
1129 #define side_type_array(_elem_type, _length, _attr...) \
1130         { \
1131                 .type = SIDE_ENUM_INIT(SIDE_TYPE_ARRAY), \
1132                 .u = { \
1133                         .side_array = { \
1134                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1135                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1136                                 .length = _length, \
1137                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1138                         }, \
1139                 }, \
1140         }
1141 #define side_field_array(_name, _elem_type, _length, _attr...) \
1142         _side_field(_name, side_type_array(SIDE_PARAM(_elem_type), _length, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1143
1144 #define side_type_vla(_elem_type, _attr...) \
1145         { \
1146                 .type = SIDE_ENUM_INIT(SIDE_TYPE_VLA), \
1147                 .u = { \
1148                         .side_vla = { \
1149                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1150                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1151                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1152                         }, \
1153                 }, \
1154         }
1155 #define side_field_vla(_name, _elem_type, _attr...) \
1156         _side_field(_name, side_type_vla(SIDE_PARAM(_elem_type), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1157
1158 #define side_type_vla_visitor(_elem_type, _visitor, _attr...) \
1159         { \
1160                 .type = SIDE_ENUM_INIT(SIDE_TYPE_VLA_VISITOR), \
1161                 .u = { \
1162                         .side_vla_visitor = { \
1163                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1164                                 .visitor = SIDE_PTR_INIT(_visitor), \
1165                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1166                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1167                         }, \
1168                 }, \
1169         }
1170 #define side_field_vla_visitor(_name, _elem_type, _visitor, _attr...) \
1171         _side_field(_name, side_type_vla_visitor(SIDE_PARAM(_elem_type), _visitor, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1172
1173 /* Gather field and type definitions */
1174
1175 #define side_type_gather_byte(_offset, _access_mode, _attr...) \
1176         { \
1177                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_BYTE), \
1178                 .u = { \
1179                         .side_gather = { \
1180                                 .u = { \
1181                                         .side_byte = { \
1182                                                 .offset = _offset, \
1183                                                 .access_mode = _access_mode, \
1184                                                 .type = { \
1185                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1186                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1187                                                 }, \
1188                                         }, \
1189                                 }, \
1190                         }, \
1191                 }, \
1192         }
1193 #define side_field_gather_byte(_name, _offset, _access_mode, _attr...) \
1194         _side_field(_name, side_type_gather_byte(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1195
1196 #define _side_type_gather_bool(_byte_order, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1197         { \
1198                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_BOOL), \
1199                 .u = { \
1200                         .side_gather = { \
1201                                 .u = { \
1202                                         .side_bool = { \
1203                                                 .offset = _offset, \
1204                                                 .access_mode = _access_mode, \
1205                                                 .type = { \
1206                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1207                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1208                                                         .bool_size = _bool_size, \
1209                                                         .len_bits = _len_bits, \
1210                                                         .byte_order = SIDE_ENUM_INIT(_byte_order), \
1211                                                 }, \
1212                                                 .offset_bits = _offset_bits, \
1213                                         }, \
1214                                 }, \
1215                         }, \
1216                 }, \
1217         }
1218 #define side_type_gather_bool(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1219         _side_type_gather_bool(SIDE_TYPE_BYTE_ORDER_HOST, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1220 #define side_type_gather_bool_le(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1221         _side_type_gather_bool(SIDE_TYPE_BYTE_ORDER_LE, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1222 #define side_type_gather_bool_be(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1223         _side_type_gather_bool(SIDE_TYPE_BYTE_ORDER_BE, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1224
1225 #define side_field_gather_bool(_name, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1226         _side_field(_name, side_type_gather_bool(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))))
1227 #define side_field_gather_bool_le(_name, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1228         _side_field(_name, side_type_gather_bool_le(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))))
1229 #define side_field_gather_bool_be(_name, _offset, _bool_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1230         _side_field(_name, side_type_gather_bool_be(_offset, _bool_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))))
1231
1232 #define _side_type_gather_integer(_type, _signedness, _byte_order, _offset, \
1233                 _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1234         { \
1235                 .type = SIDE_ENUM_INIT(_type), \
1236                 .u = { \
1237                         .side_gather = { \
1238                                 .u = { \
1239                                         .side_integer = { \
1240                                                 .offset = _offset, \
1241                                                 .access_mode = _access_mode, \
1242                                                 .type = { \
1243                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1244                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1245                                                         .integer_size = _integer_size, \
1246                                                         .len_bits = _len_bits, \
1247                                                         .signedness = _signedness, \
1248                                                         .byte_order = SIDE_ENUM_INIT(_byte_order), \
1249                                                 }, \
1250                                                 .offset_bits = _offset_bits, \
1251                                         }, \
1252                                 }, \
1253                         }, \
1254                 }, \
1255         }
1256
1257 #define side_type_gather_unsigned_integer(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1258         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, false,  SIDE_TYPE_BYTE_ORDER_HOST, \
1259                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1260 #define side_type_gather_signed_integer(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1261         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, true, SIDE_TYPE_BYTE_ORDER_HOST, \
1262                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1263
1264 #define side_type_gather_unsigned_integer_le(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1265         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, false,  SIDE_TYPE_BYTE_ORDER_LE, \
1266                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1267 #define side_type_gather_signed_integer_le(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1268         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, true, SIDE_TYPE_BYTE_ORDER_LE, \
1269                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1270
1271 #define side_type_gather_unsigned_integer_be(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1272         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, false,  SIDE_TYPE_BYTE_ORDER_BE, \
1273                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1274 #define side_type_gather_signed_integer_be(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1275         _side_type_gather_integer(SIDE_TYPE_GATHER_INTEGER, true, SIDE_TYPE_BYTE_ORDER_BE, \
1276                         _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1277
1278 #define side_field_gather_unsigned_integer(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1279         _side_field(_name, side_type_gather_unsigned_integer(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1280 #define side_field_gather_signed_integer(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1281         _side_field(_name, side_type_gather_signed_integer(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1282
1283 #define side_field_gather_unsigned_integer_le(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1284         _side_field(_name, side_type_gather_unsigned_integer_le(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1285 #define side_field_gather_signed_integer_le(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1286         _side_field(_name, side_type_gather_signed_integer_le(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1287
1288 #define side_field_gather_unsigned_integer_be(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1289         _side_field(_name, side_type_gather_unsigned_integer_be(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1290 #define side_field_gather_signed_integer_be(_name, _integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, _attr...) \
1291         _side_field(_name, side_type_gather_signed_integer_be(_integer_offset, _integer_size, _offset_bits, _len_bits, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1292
1293 #define side_type_gather_pointer(_offset, _access_mode, _attr...) \
1294         _side_type_gather_integer(SIDE_TYPE_GATHER_POINTER, false, SIDE_TYPE_BYTE_ORDER_HOST, \
1295                         _offset, sizeof(uintptr_t), 0, 0, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1296 #define side_field_gather_pointer(_name, _offset, _access_mode, _attr...) \
1297         _side_field(_name, side_type_gather_pointer(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1298
1299 #define side_type_gather_pointer_le(_offset, _access_mode, _attr...) \
1300         _side_type_gather_integer(SIDE_TYPE_GATHER_POINTER, false, SIDE_TYPE_BYTE_ORDER_LE, \
1301                         _offset, sizeof(uintptr_t), 0, 0, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1302 #define side_field_gather_pointer_le(_name, _offset, _access_mode, _attr...) \
1303         _side_field(_name, side_type_gather_pointer_le(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1304
1305 #define side_type_gather_pointer_be(_offset, _access_mode, _attr...) \
1306         _side_type_gather_integer(SIDE_TYPE_GATHER_POINTER, false, SIDE_TYPE_BYTE_ORDER_BE, \
1307                         _offset, sizeof(uintptr_t), 0, 0, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1308 #define side_field_gather_pointer_be(_name, _offset, _access_mode, _attr...) \
1309         _side_field(_name, side_type_gather_pointer_be(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1310
1311 #define _side_type_gather_float(_byte_order, _offset, _float_size, _access_mode, _attr...) \
1312         { \
1313                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_FLOAT), \
1314                 .u = { \
1315                         .side_gather = { \
1316                                 .u = { \
1317                                         .side_float = { \
1318                                                 .offset = _offset, \
1319                                                 .access_mode = _access_mode, \
1320                                                 .type = { \
1321                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1322                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1323                                                         .float_size = _float_size, \
1324                                                         .byte_order = SIDE_ENUM_INIT(_byte_order), \
1325                                                 }, \
1326                                         }, \
1327                                 }, \
1328                         }, \
1329                 }, \
1330         }
1331
1332 #define side_type_gather_float(_offset, _float_size, _access_mode, _attr...) \
1333         _side_type_gather_float(SIDE_TYPE_FLOAT_WORD_ORDER_HOST, _offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1334 #define side_type_gather_float_le(_offset, _float_size, _access_mode, _attr...) \
1335         _side_type_gather_float(SIDE_TYPE_BYTE_ORDER_LE, _offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1336 #define side_type_gather_float_be(_offset, _float_size, _access_mode, _attr...) \
1337         _side_type_gather_float(SIDE_TYPE_BYTE_ORDER_BE, _offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1338
1339 #define side_field_gather_float(_name, _offset, _float_size, _access_mode, _attr...) \
1340         _side_field(_name, side_type_gather_float(_offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1341 #define side_field_gather_float_le(_name, _offset, _float_size, _access_mode, _attr...) \
1342         _side_field(_name, side_type_gather_float_le(_offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1343 #define side_field_gather_float_be(_name, _offset, _float_size, _access_mode, _attr...) \
1344         _side_field(_name, side_type_gather_float_be(_offset, _float_size, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1345
1346 #define _side_type_gather_string(_offset, _byte_order, _unit_size, _access_mode, _attr...) \
1347         { \
1348                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_STRING), \
1349                 .u = { \
1350                         .side_gather = { \
1351                                 .u = { \
1352                                         .side_string = { \
1353                                                 .offset = _offset, \
1354                                                 .access_mode = _access_mode, \
1355                                                 .type = { \
1356                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1357                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1358                                                         .unit_size = _unit_size, \
1359                                                         .byte_order = SIDE_ENUM_INIT(_byte_order), \
1360                                                 }, \
1361                                         }, \
1362                                 }, \
1363                         }, \
1364                 }, \
1365         }
1366 #define side_type_gather_string(_offset, _access_mode, _attr...) \
1367         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1368 #define side_field_gather_string(_name, _offset, _access_mode, _attr...) \
1369         _side_field(_name, side_type_gather_string(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1370
1371 #define side_type_gather_string16(_offset, _access_mode, _attr...) \
1372         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint16_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1373 #define side_type_gather_string16_le(_offset, _access_mode, _attr...) \
1374         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint16_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1375 #define side_type_gather_string16_be(_offset, _access_mode, _attr...) \
1376         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint16_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1377
1378 #define side_field_gather_string16(_name, _offset, _access_mode, _attr...) \
1379         _side_field(_name, side_type_gather_string16(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1380 #define side_field_gather_string16_le(_name, _offset, _access_mode, _attr...) \
1381         _side_field(_name, side_type_gather_string16_le(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1382 #define side_field_gather_string16_be(_name, _offset, _access_mode, _attr...) \
1383         _side_field(_name, side_type_gather_string16_be(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1384
1385 #define side_type_gather_string32(_offset, _access_mode, _attr...) \
1386         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint32_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1387 #define side_type_gather_string32_le(_offset, _access_mode, _attr...) \
1388         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint32_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1389 #define side_type_gather_string32_be(_offset, _access_mode, _attr...) \
1390         _side_type_gather_string(_offset, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint32_t), _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1391
1392 #define side_field_gather_string32(_name, _offset, _access_mode, _attr...) \
1393         _side_field(_name, side_type_gather_string32(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1394 #define side_field_gather_string32_le(_name, _offset, _access_mode, _attr...) \
1395         _side_field(_name, side_type_gather_string32_le(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1396 #define side_field_gather_string32_be(_name, _offset, _access_mode, _attr...) \
1397         _side_field(_name, side_type_gather_string32_be(_offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1398
1399 #define side_type_gather_enum(_mappings, _elem_type) \
1400         { \
1401                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_ENUM), \
1402                 .u = { \
1403                         .side_enum = { \
1404                                 .mappings = SIDE_PTR_INIT(_mappings), \
1405                                 .elem_type = SIDE_PTR_INIT(_elem_type), \
1406                         }, \
1407                 }, \
1408         }
1409 #define side_field_gather_enum(_name, _mappings, _elem_type) \
1410         _side_field(_name, side_type_gather_enum(SIDE_PARAM(_mappings), SIDE_PARAM(_elem_type)))
1411
1412 #define side_type_gather_struct(_struct_gather, _offset, _size, _access_mode) \
1413         { \
1414                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_STRUCT), \
1415                 .u = { \
1416                         .side_gather = { \
1417                                 .u = { \
1418                                         .side_struct = { \
1419                                                 .offset = _offset, \
1420                                                 .access_mode = _access_mode, \
1421                                                 .type = SIDE_PTR_INIT(_struct_gather), \
1422                                                 .size = _size, \
1423                                         }, \
1424                                 }, \
1425                         }, \
1426                 }, \
1427         }
1428 #define side_field_gather_struct(_name, _struct_gather, _offset, _size, _access_mode) \
1429         _side_field(_name, side_type_gather_struct(SIDE_PARAM(_struct_gather), _offset, _size, _access_mode))
1430
1431 #define side_type_gather_array(_elem_type_gather, _length, _offset, _access_mode, _attr...) \
1432         { \
1433                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_ARRAY), \
1434                 .u = { \
1435                         .side_gather = { \
1436                                 .u = { \
1437                                         .side_array = { \
1438                                                 .offset = _offset, \
1439                                                 .access_mode = _access_mode, \
1440                                                 .type = { \
1441                                                         .elem_type = SIDE_PTR_INIT(_elem_type_gather), \
1442                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1443                                                         .length = _length, \
1444                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1445                                                 }, \
1446                                         }, \
1447                                 }, \
1448                         }, \
1449                 }, \
1450         }
1451 #define side_field_gather_array(_name, _elem_type, _length, _offset, _access_mode, _attr...) \
1452         _side_field(_name, side_type_gather_array(SIDE_PARAM(_elem_type), _length, _offset, _access_mode, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1453
1454 #define side_type_gather_vla(_elem_type_gather, _offset, _access_mode, _length_type_gather, _attr...) \
1455         { \
1456                 .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_VLA), \
1457                 .u = { \
1458                         .side_gather = { \
1459                                 .u = { \
1460                                         .side_vla = { \
1461                                                 .length_type = SIDE_PTR_INIT(_length_type_gather), \
1462                                                 .offset = _offset, \
1463                                                 .access_mode = _access_mode, \
1464                                                 .type = { \
1465                                                         .elem_type = SIDE_PTR_INIT(_elem_type_gather), \
1466                                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1467                                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1468                                                 }, \
1469                                         }, \
1470                                 }, \
1471                         }, \
1472                 }, \
1473         }
1474 #define side_field_gather_vla(_name, _elem_type_gather, _offset, _access_mode, _length_type_gather, _attr...) \
1475         _side_field(_name, side_type_gather_vla(SIDE_PARAM(_elem_type_gather), _offset, _access_mode, SIDE_PARAM(_length_type_gather), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())))
1476
1477 #define side_elem(...) \
1478         SIDE_COMPOUND_LITERAL(const struct side_type, __VA_ARGS__)
1479
1480 #define side_length(...) \
1481         SIDE_COMPOUND_LITERAL(const struct side_type, __VA_ARGS__)
1482
1483 #define side_field_list(...) \
1484         SIDE_COMPOUND_LITERAL(const struct side_event_field, __VA_ARGS__)
1485
1486 #define side_option_list(...) \
1487         SIDE_COMPOUND_LITERAL(const struct side_variant_option, __VA_ARGS__)
1488
1489 /* Stack-copy field arguments */
1490
1491 #define side_arg_null(_val)             { .type = SIDE_ENUM_INIT(SIDE_TYPE_NULL) }
1492 #define side_arg_bool(_val)             { .type = SIDE_ENUM_INIT(SIDE_TYPE_BOOL), .u = { .side_static = { .bool_value = { .side_bool8 = !!(_val) } } } }
1493 #define side_arg_byte(_val)             { .type = SIDE_ENUM_INIT(SIDE_TYPE_BYTE), .u = { .side_static = { .byte_value = (_val) } } }
1494 #define side_arg_string(_val)           { .type = SIDE_ENUM_INIT(SIDE_TYPE_STRING_UTF8), .u = { .side_static = { .string_value = SIDE_PTR_INIT(_val) } } }
1495 #define side_arg_string16(_val)         { .type = SIDE_ENUM_INIT(SIDE_TYPE_STRING_UTF16), .u = { .side_static = { .string_value = SIDE_PTR_INIT(_val) } } }
1496 #define side_arg_string32(_val)         { .type = SIDE_ENUM_INIT(SIDE_TYPE_STRING_UTF32), .u = { .side_static = { .string_value = SIDE_PTR_INIT(_val) } } }
1497
1498 #define side_arg_u8(_val)               { .type = SIDE_ENUM_INIT(SIDE_TYPE_U8), .u = { .side_static = {  .integer_value = { .side_u8 = (_val) } } } }
1499 #define side_arg_u16(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_U16), .u = { .side_static = { .integer_value = { .side_u16 = (_val) } } } }
1500 #define side_arg_u32(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_U32), .u = { .side_static = { .integer_value = { .side_u32 = (_val) } } } }
1501 #define side_arg_u64(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_U64), .u = { .side_static = { .integer_value = { .side_u64 = (_val) } } } }
1502 #define side_arg_s8(_val)               { .type = SIDE_ENUM_INIT(SIDE_TYPE_S8), .u = { .side_static = { .integer_value = { .side_s8 = (_val) } } } }
1503 #define side_arg_s16(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_S16), .u = { .side_static = { .integer_value = { .side_s16 = (_val) } } } }
1504 #define side_arg_s32(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_S32), .u = { .side_static = { .integer_value = { .side_s32 = (_val) } } } }
1505 #define side_arg_s64(_val)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_S64), .u = { .side_static = { .integer_value = { .side_s64 = (_val) } } } }
1506 #define side_arg_pointer(_val)          { .type = SIDE_ENUM_INIT(SIDE_TYPE_POINTER), .u = { .side_static = { .integer_value = { .side_uptr = (uintptr_t) (_val) } } } }
1507 #define side_arg_float_binary16(_val)   { .type = SIDE_ENUM_INIT(SIDE_TYPE_FLOAT_BINARY16), .u = { .side_static = { .float_value = { .side_float_binary16 = (_val) } } } }
1508 #define side_arg_float_binary32(_val)   { .type = SIDE_ENUM_INIT(SIDE_TYPE_FLOAT_BINARY32), .u = { .side_static = { .float_value = { .side_float_binary32 = (_val) } } } }
1509 #define side_arg_float_binary64(_val)   { .type = SIDE_ENUM_INIT(SIDE_TYPE_FLOAT_BINARY64), .u = { .side_static = { .float_value = { .side_float_binary64 = (_val) } } } }
1510 #define side_arg_float_binary128(_val)  { .type = SIDE_ENUM_INIT(SIDE_TYPE_FLOAT_BINARY128), .u = { .side_static = { .float_value = { .side_float_binary128 = (_val) } } } }
1511
1512 #define side_arg_struct(_side_type)     { .type = SIDE_ENUM_INIT(SIDE_TYPE_STRUCT), .u = { .side_static = { .side_struct = SIDE_PTR_INIT(_side_type) } } }
1513
1514 #define side_arg_define_variant(_identifier, _selector_val, _option) \
1515         const struct side_arg_variant _identifier = { \
1516                 .selector = _selector_val, \
1517                 .option = _option, \
1518         }
1519 #define side_arg_variant(_side_variant) \
1520         { \
1521                 .type = SIDE_ENUM_INIT(SIDE_TYPE_VARIANT), \
1522                 .u = { \
1523                         .side_static = { \
1524                                 .side_variant = SIDE_PTR_INIT(_side_variant), \
1525                         }, \
1526                 }, \
1527         }
1528
1529 #define side_arg_array(_side_type)      { .type = SIDE_ENUM_INIT(SIDE_TYPE_ARRAY), .u = { .side_static = { .side_array = SIDE_PTR_INIT(_side_type) } } }
1530 #define side_arg_vla(_side_type)        { .type = SIDE_ENUM_INIT(SIDE_TYPE_VLA), .u = { .side_static = { .side_vla = SIDE_PTR_INIT(_side_type) } } }
1531 #define side_arg_vla_visitor(_ctx)      { .type = SIDE_ENUM_INIT(SIDE_TYPE_VLA_VISITOR), .u = { .side_static = { .side_vla_app_visitor_ctx = (_ctx) } } }
1532
1533 /* Gather field arguments */
1534
1535 #define side_arg_gather_bool(_ptr)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_BOOL), .u = { .side_static = { .side_bool_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1536 #define side_arg_gather_byte(_ptr)              { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_BYTE), .u = { .side_static = { .side_byte_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1537 #define side_arg_gather_pointer(_ptr)           { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_POINTER), .u = { .side_static = { .side_integer_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1538 #define side_arg_gather_integer(_ptr)           { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_INTEGER), .u = { .side_static = { .side_integer_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1539 #define side_arg_gather_float(_ptr)             { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_FLOAT), .u = { .side_static = { .side_float_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1540 #define side_arg_gather_string(_ptr)            { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_STRING), .u = { .side_static = { .side_string_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1541 #define side_arg_gather_struct(_ptr)            { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_STRUCT), .u = { .side_static = { .side_struct_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1542 #define side_arg_gather_array(_ptr)             { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_ARRAY), .u = { .side_static = { .side_array_gather_ptr = SIDE_PTR_INIT(_ptr) } } }
1543 #define side_arg_gather_vla(_ptr, _length_ptr)  { .type = SIDE_ENUM_INIT(SIDE_TYPE_GATHER_VLA), .u = { .side_static = { .side_vla_gather = { .ptr = SIDE_PTR_INIT(_ptr), .length_ptr = SIDE_PTR_INIT(_length_ptr) } } } }
1544
1545 /* Dynamic field arguments */
1546
1547 #define side_arg_dynamic_null(_attr...) \
1548         { \
1549                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_NULL), \
1550                 .u = { \
1551                         .side_dynamic = { \
1552                                 .side_null = { \
1553                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1554                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1555                                 }, \
1556                         }, \
1557                 }, \
1558         }
1559
1560 #define side_arg_dynamic_bool(_val, _attr...) \
1561         { \
1562                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_BOOL), \
1563                 .u = { \
1564                         .side_dynamic = { \
1565                                 .side_bool = { \
1566                                         .type = { \
1567                                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1568                                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1569                                                 .bool_size = sizeof(uint8_t), \
1570                                                 .len_bits = 0, \
1571                                                 .byte_order = SIDE_ENUM_INIT(SIDE_TYPE_BYTE_ORDER_HOST), \
1572                                         }, \
1573                                         .value = { \
1574                                                 .side_bool8 = !!(_val), \
1575                                         }, \
1576                                 }, \
1577                         }, \
1578                 }, \
1579         }
1580
1581 #define side_arg_dynamic_byte(_val, _attr...) \
1582         { \
1583                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_BYTE), \
1584                 .u = { \
1585                         .side_dynamic = { \
1586                                 .side_byte = { \
1587                                         .type = { \
1588                                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1589                                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1590                                         }, \
1591                                         .value = (_val), \
1592                                 }, \
1593                         }, \
1594                 }, \
1595         }
1596
1597 #define _side_arg_dynamic_string(_val, _byte_order, _unit_size, _attr...) \
1598         { \
1599                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_STRING), \
1600                 .u = { \
1601                         .side_dynamic = { \
1602                                 .side_string = { \
1603                                         .type = { \
1604                                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1605                                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1606                                                 .unit_size = _unit_size, \
1607                                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
1608                                         }, \
1609                                         .value = (uintptr_t) (_val), \
1610                                 }, \
1611                         }, \
1612                 }, \
1613         }
1614 #define side_arg_dynamic_string(_val, _attr...) \
1615         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1616 #define side_arg_dynamic_string16(_val, _attr...) \
1617         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1618 #define side_arg_dynamic_string16_le(_val, _attr...) \
1619         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1620 #define side_arg_dynamic_string16_be(_val, _attr...) \
1621         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint16_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1622 #define side_arg_dynamic_string32(_val, _attr...) \
1623         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1624 #define side_arg_dynamic_string32_le(_val, _attr...) \
1625         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_LE, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1626 #define side_arg_dynamic_string32_be(_val, _attr...) \
1627         _side_arg_dynamic_string(_val, SIDE_TYPE_BYTE_ORDER_BE, sizeof(uint32_t), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1628
1629 #define _side_arg_dynamic_integer(_field, _val, _type, _signedness, _byte_order, _integer_size, _len_bits, _attr...) \
1630         { \
1631                 .type = SIDE_ENUM_INIT(_type), \
1632                 .u = { \
1633                         .side_dynamic = { \
1634                                 .side_integer = { \
1635                                         .type = { \
1636                                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1637                                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1638                                                 .integer_size = _integer_size, \
1639                                                 .len_bits = _len_bits, \
1640                                                 .signedness = _signedness, \
1641                                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
1642                                         }, \
1643                                         .value = { \
1644                                                 _field = (_val), \
1645                                         }, \
1646                                 }, \
1647                         }, \
1648                 }, \
1649         }
1650
1651 #define side_arg_dynamic_u8(_val, _attr...) \
1652         _side_arg_dynamic_integer(.side_u8, _val, SIDE_TYPE_DYNAMIC_INTEGER, false, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(uint8_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1653 #define side_arg_dynamic_s8(_val, _attr...) \
1654         _side_arg_dynamic_integer(.side_s8, _val, SIDE_TYPE_DYNAMIC_INTEGER, true, SIDE_TYPE_BYTE_ORDER_HOST, sizeof(int8_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1655
1656 #define _side_arg_dynamic_u16(_val, _byte_order, _attr...) \
1657         _side_arg_dynamic_integer(.side_u16, _val, SIDE_TYPE_DYNAMIC_INTEGER, false, _byte_order, sizeof(uint16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1658 #define _side_arg_dynamic_u32(_val, _byte_order, _attr...) \
1659         _side_arg_dynamic_integer(.side_u32, _val, SIDE_TYPE_DYNAMIC_INTEGER, false, _byte_order, sizeof(uint32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1660 #define _side_arg_dynamic_u64(_val, _byte_order, _attr...) \
1661         _side_arg_dynamic_integer(.side_u64, _val, SIDE_TYPE_DYNAMIC_INTEGER, false, _byte_order, sizeof(uint64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1662
1663 #define _side_arg_dynamic_s16(_val, _byte_order, _attr...) \
1664         _side_arg_dynamic_integer(.side_s16, _val, SIDE_TYPE_DYNAMIC_INTEGER, true, _byte_order, sizeof(int16_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1665 #define _side_arg_dynamic_s32(_val, _byte_order, _attr...) \
1666         _side_arg_dynamic_integer(.side_s32, _val, SIDE_TYPE_DYNAMIC_INTEGER, true, _byte_order, sizeof(int32_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1667 #define _side_arg_dynamic_s64(_val, _byte_order, _attr...) \
1668         _side_arg_dynamic_integer(.side_s64, _val, SIDE_TYPE_DYNAMIC_INTEGER, true, _byte_order, sizeof(int64_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1669
1670 #define _side_arg_dynamic_pointer(_val, _byte_order, _attr...) \
1671         _side_arg_dynamic_integer(.side_uptr, (uintptr_t) (_val), SIDE_TYPE_DYNAMIC_POINTER, false, _byte_order, \
1672                         sizeof(uintptr_t), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1673
1674 #define _side_arg_dynamic_float(_field, _val, _type, _byte_order, _float_size, _attr...) \
1675         { \
1676                 .type = SIDE_ENUM_INIT(_type), \
1677                 .u = { \
1678                         .side_dynamic = { \
1679                                 .side_float = { \
1680                                         .type = { \
1681                                                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1682                                                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1683                                                 .float_size = _float_size, \
1684                                                 .byte_order = SIDE_ENUM_INIT(_byte_order), \
1685                                         }, \
1686                                         .value = { \
1687                                                 _field = (_val), \
1688                                         }, \
1689                                 }, \
1690                         }, \
1691                 }, \
1692         }
1693
1694 #define _side_arg_dynamic_float_binary16(_val, _byte_order, _attr...) \
1695         _side_arg_dynamic_float(.side_float_binary16, _val, SIDE_TYPE_DYNAMIC_FLOAT, _byte_order, sizeof(_Float16), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1696 #define _side_arg_dynamic_float_binary32(_val, _byte_order, _attr...) \
1697         _side_arg_dynamic_float(.side_float_binary32, _val, SIDE_TYPE_DYNAMIC_FLOAT, _byte_order, sizeof(_Float32), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1698 #define _side_arg_dynamic_float_binary64(_val, _byte_order, _attr...) \
1699         _side_arg_dynamic_float(.side_float_binary64, _val, SIDE_TYPE_DYNAMIC_FLOAT, _byte_order, sizeof(_Float64), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1700 #define _side_arg_dynamic_float_binary128(_val, _byte_order, _attr...) \
1701         _side_arg_dynamic_float(.side_float_binary128, _val, SIDE_TYPE_DYNAMIC_FLOAT, _byte_order, sizeof(_Float128), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1702
1703 /* Host endian */
1704 #define side_arg_dynamic_u16(_val, _attr...)                    _side_arg_dynamic_u16(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1705 #define side_arg_dynamic_u32(_val, _attr...)                    _side_arg_dynamic_u32(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1706 #define side_arg_dynamic_u64(_val, _attr...)                    _side_arg_dynamic_u64(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1707 #define side_arg_dynamic_s16(_val, _attr...)                    _side_arg_dynamic_s16(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1708 #define side_arg_dynamic_s32(_val, _attr...)                    _side_arg_dynamic_s32(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1709 #define side_arg_dynamic_s64(_val, _attr...)                    _side_arg_dynamic_s64(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1710 #define side_arg_dynamic_pointer(_val, _attr...)                _side_arg_dynamic_pointer(_val, SIDE_TYPE_BYTE_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1711 #define side_arg_dynamic_float_binary16(_val, _attr...)         _side_arg_dynamic_float_binary16(_val, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1712 #define side_arg_dynamic_float_binary32(_val, _attr...)         _side_arg_dynamic_float_binary32(_val, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1713 #define side_arg_dynamic_float_binary64(_val, _attr...)         _side_arg_dynamic_float_binary64(_val, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1714 #define side_arg_dynamic_float_binary128(_val, _attr...)        _side_arg_dynamic_float_binary128(_val, SIDE_TYPE_FLOAT_WORD_ORDER_HOST, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1715
1716 /* Little endian */
1717 #define side_arg_dynamic_u16_le(_val, _attr...)                 _side_arg_dynamic_u16(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1718 #define side_arg_dynamic_u32_le(_val, _attr...)                 _side_arg_dynamic_u32(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1719 #define side_arg_dynamic_u64_le(_val, _attr...)                 _side_arg_dynamic_u64(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1720 #define side_arg_dynamic_s16_le(_val, _attr...)                 _side_arg_dynamic_s16(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1721 #define side_arg_dynamic_s32_le(_val, _attr...)                 _side_arg_dynamic_s32(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1722 #define side_arg_dynamic_s64_le(_val, _attr...)                 _side_arg_dynamic_s64(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1723 #define side_arg_dynamic_pointer_le(_val, _attr...)             _side_arg_dynamic_pointer(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1724 #define side_arg_dynamic_float_binary16_le(_val, _attr...)      _side_arg_dynamic_float_binary16(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1725 #define side_arg_dynamic_float_binary32_le(_val, _attr...)      _side_arg_dynamic_float_binary32(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1726 #define side_arg_dynamic_float_binary64_le(_val, _attr...)      _side_arg_dynamic_float_binary64(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1727 #define side_arg_dynamic_float_binary128_le(_val, _attr...)     _side_arg_dynamic_float_binary128(_val, SIDE_TYPE_BYTE_ORDER_LE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1728
1729 /* Big endian */
1730 #define side_arg_dynamic_u16_be(_val, _attr...)                 _side_arg_dynamic_u16(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1731 #define side_arg_dynamic_u32_be(_val, _attr...)                 _side_arg_dynamic_u32(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1732 #define side_arg_dynamic_u64_be(_val, _attr...)                 _side_arg_dynamic_u64(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1733 #define side_arg_dynamic_s16_be(_val, _attr...)                 _side_arg_dynamic_s16(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1734 #define side_arg_dynamic_s32_be(_val, _attr...)                 _side_arg_dynamic_s32(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1735 #define side_arg_dynamic_s64_be(_val, _attr...)                 _side_arg_dynamic_s64(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1736 #define side_arg_dynamic_pointer_be(_val, _attr...)             _side_arg_dynamic_pointer(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1737 #define side_arg_dynamic_float_binary16_be(_val, _attr...)      _side_arg_dynamic_float_binary16(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1738 #define side_arg_dynamic_float_binary32_be(_val, _attr...)      _side_arg_dynamic_float_binary32(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1739 #define side_arg_dynamic_float_binary64_be(_val, _attr...)      _side_arg_dynamic_float_binary64(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1740 #define side_arg_dynamic_float_binary128_be(_val, _attr...)     _side_arg_dynamic_float_binary128(_val, SIDE_TYPE_BYTE_ORDER_BE, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1741
1742 #define side_arg_dynamic_vla(_vla) \
1743         { \
1744                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_VLA), \
1745                 .u = { \
1746                         .side_dynamic = { \
1747                                 .side_dynamic_vla = SIDE_PTR_INIT(_vla), \
1748                         }, \
1749                 }, \
1750         }
1751
1752 #define side_arg_dynamic_vla_visitor(_dynamic_vla_visitor, _ctx, _attr...) \
1753         { \
1754                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_VLA_VISITOR), \
1755                 .u = { \
1756                         .side_dynamic = { \
1757                                 .side_dynamic_vla_visitor = { \
1758                                         .app_ctx = SIDE_PTR_INIT(_ctx), \
1759                                         .visitor = SIDE_PTR_INIT(_dynamic_vla_visitor), \
1760                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1761                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1762                                 }, \
1763                         }, \
1764                 }, \
1765         }
1766
1767 #define side_arg_dynamic_struct(_struct) \
1768         { \
1769                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_STRUCT), \
1770                 .u = { \
1771                         .side_dynamic = { \
1772                                 .side_dynamic_struct = SIDE_PTR_INIT(_struct), \
1773                         }, \
1774                 }, \
1775         }
1776
1777 #define side_arg_dynamic_struct_visitor(_dynamic_struct_visitor, _ctx, _attr...) \
1778         { \
1779                 .type = SIDE_ENUM_INIT(SIDE_TYPE_DYNAMIC_STRUCT_VISITOR), \
1780                 .u = { \
1781                         .side_dynamic = { \
1782                                 .side_dynamic_struct_visitor = { \
1783                                         .app_ctx = SIDE_PTR_INIT(_ctx), \
1784                                         .visitor = SIDE_PTR_INIT(_dynamic_struct_visitor), \
1785                                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1786                                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1787                                 }, \
1788                         }, \
1789                 }, \
1790         }
1791
1792 #define side_arg_dynamic_define_vec(_identifier, _sav, _attr...) \
1793         const struct side_arg _identifier##_vec[] = { _sav }; \
1794         const struct side_arg_dynamic_vla _identifier = { \
1795                 .sav = SIDE_PTR_INIT(_identifier##_vec), \
1796                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1797                 .len = SIDE_ARRAY_SIZE(_identifier##_vec), \
1798                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1799         }
1800
1801 #define side_arg_dynamic_define_struct(_identifier, _struct_fields, _attr...) \
1802         const struct side_arg_dynamic_field _identifier##_fields[] = { _struct_fields }; \
1803         const struct side_arg_dynamic_struct _identifier = { \
1804                 .fields = SIDE_PTR_INIT(_identifier##_fields), \
1805                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1806                 .len = SIDE_ARRAY_SIZE(_identifier##_fields), \
1807                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1808         }
1809
1810 #define side_arg_define_vec(_identifier, _sav) \
1811         const struct side_arg _identifier##_vec[] = { _sav }; \
1812         const struct side_arg_vec _identifier = { \
1813                 .sav = SIDE_PTR_INIT(_identifier##_vec), \
1814                 .len = SIDE_ARRAY_SIZE(_identifier##_vec), \
1815         }
1816
1817 #define side_arg_dynamic_field(_name, _elem) \
1818         { \
1819                 .field_name = SIDE_PTR_INIT(_name), \
1820                 .elem = _elem, \
1821         }
1822
1823 /*
1824  * Event instrumentation description registration, runtime enabled state
1825  * check, and instrumentation invocation.
1826  */
1827
1828 #define side_arg_list(...)      __VA_ARGS__
1829
1830 #define side_event_cond(_identifier) \
1831         if (side_unlikely(__atomic_load_n(&side_event_state__##_identifier.enabled, \
1832                                         __ATOMIC_RELAXED)))
1833
1834 #define side_event_call(_identifier, _sav) \
1835         { \
1836                 const struct side_arg side_sav[] = { _sav }; \
1837                 const struct side_arg_vec side_arg_vec = { \
1838                         .sav = SIDE_PTR_INIT(side_sav), \
1839                         .len = SIDE_ARRAY_SIZE(side_sav), \
1840                 }; \
1841                 side_call(&(side_event_state__##_identifier), &side_arg_vec); \
1842         }
1843
1844 #define side_event(_identifier, _sav) \
1845         side_event_cond(_identifier) \
1846                 side_event_call(_identifier, SIDE_PARAM(_sav))
1847
1848 #define side_event_call_variadic(_identifier, _sav, _var_fields, _attr...) \
1849         { \
1850                 const struct side_arg side_sav[] = { _sav }; \
1851                 const struct side_arg_vec side_arg_vec = { \
1852                         .sav = SIDE_PTR_INIT(side_sav), \
1853                         .len = SIDE_ARRAY_SIZE(side_sav), \
1854                 }; \
1855                 const struct side_arg_dynamic_field side_fields[] = { _var_fields }; \
1856                 const struct side_arg_dynamic_struct var_struct = { \
1857                         .fields = SIDE_PTR_INIT(side_fields), \
1858                         .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1859                         .len = SIDE_ARRAY_SIZE(side_fields), \
1860                         .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1861                 }; \
1862                 side_call_variadic(&(side_event_state__##_identifier), &side_arg_vec, &var_struct); \
1863         }
1864
1865 #define side_event_variadic(_identifier, _sav, _var, _attr...) \
1866         side_event_cond(_identifier) \
1867                 side_event_call_variadic(_identifier, SIDE_PARAM(_sav), SIDE_PARAM(_var), SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1868
1869 #define _side_define_event(_linkage, _identifier, _provider, _event, _loglevel, _fields, _flags, _attr...) \
1870         _linkage struct side_event_description __attribute__((section("side_event_description"))) \
1871                         _identifier; \
1872         _linkage struct side_event_state __attribute__((section("side_event_state"))) \
1873                         side_event_state__##_identifier = { \
1874                 .enabled = 0, \
1875                 .callbacks = &side_empty_callback, \
1876                 .desc = &(_identifier), \
1877         }; \
1878         _linkage struct side_event_description __attribute__((section("side_event_description"))) \
1879                         _identifier = { \
1880                 .state = SIDE_PTR_INIT(&(side_event_state__##_identifier)), \
1881                 .provider_name = SIDE_PTR_INIT(_provider), \
1882                 .event_name = SIDE_PTR_INIT(_event), \
1883                 .fields = SIDE_PTR_INIT(_fields), \
1884                 .attr = SIDE_PTR_INIT(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1885                 .flags = (_flags), \
1886                 .version = 0, \
1887                 .nr_side_type_label = _NR_SIDE_TYPE_LABEL, \
1888                 .nr_side_attr_type = _NR_SIDE_ATTR_TYPE, \
1889                 .loglevel = SIDE_ENUM_INIT(_loglevel), \
1890                 .nr_fields = SIDE_ARRAY_SIZE(SIDE_PARAM(_fields)), \
1891                 .nr_attr = SIDE_ARRAY_SIZE(SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list())), \
1892                 .nr_callbacks = 0, \
1893         }; \
1894         static const struct side_event_description *side_event_ptr__##_identifier \
1895                 __attribute__((section("side_event_description_ptr"), used)) = &(_identifier);
1896
1897 #define side_static_event(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1898         _side_define_event(static, _identifier, _provider, _event, _loglevel, SIDE_PARAM(_fields), \
1899                         0, ##_attr)
1900
1901 #define side_static_event_variadic(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1902         _side_define_event(static, _identifier, _provider, _event, _loglevel, SIDE_PARAM(_fields), \
1903                         SIDE_EVENT_FLAG_VARIADIC, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1904
1905 #define side_hidden_event(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1906         _side_define_event(__attribute__((visibility("hidden"))), _identifier, _provider, _event, \
1907                         _loglevel, SIDE_PARAM(_fields), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1908
1909 #define side_hidden_event_variadic(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1910         _side_define_event(__attribute__((visibility("hidden"))), _identifier, _provider, _event, \
1911                         _loglevel, SIDE_PARAM(_fields), SIDE_EVENT_FLAG_VARIADIC, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1912
1913 #define side_export_event(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1914         _side_define_event(__attribute__((visibility("default"))), _identifier, _provider, _event, \
1915                         _loglevel, SIDE_PARAM(_fields), 0, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1916
1917 #define side_export_event_variadic(_identifier, _provider, _event, _loglevel, _fields, _attr...) \
1918         _side_define_event(__attribute__((visibility("default"))), _identifier, _provider, _event, \
1919                         _loglevel, SIDE_PARAM(_fields), SIDE_EVENT_FLAG_VARIADIC, SIDE_PARAM_SELECT_ARG1(_, ##_attr, side_attr_list()))
1920
1921 #define side_declare_event(_identifier) \
1922         extern struct side_event_state side_event_state_##_identifier; \
1923         extern struct side_event_description _identifier
1924
1925 #ifdef __cplusplus
1926 extern "C" {
1927 #endif
1928
1929 struct side_callback {
1930         union {
1931                 void (*call)(const struct side_event_description *desc,
1932                         const struct side_arg_vec *side_arg_vec,
1933                         void *priv);
1934                 void (*call_variadic)(const struct side_event_description *desc,
1935                         const struct side_arg_vec *side_arg_vec,
1936                         const struct side_arg_dynamic_struct *var_struct,
1937                         void *priv);
1938         } SIDE_PACKED u;
1939         void *priv;
1940 } SIDE_PACKED;
1941
1942 /* The visitor pattern is a double-dispatch visitor. */
1943 struct side_tracer_visitor_ctx {
1944         side_write_elem_func write_elem;
1945         void *priv;             /* Private tracer context. */
1946 } SIDE_PACKED;
1947
1948 struct side_tracer_dynamic_struct_visitor_ctx {
1949         side_write_field_func write_field;
1950         void *priv;             /* Private tracer context. */
1951 } SIDE_PACKED;
1952
1953 extern const struct side_callback side_empty_callback;
1954
1955 void side_call(const struct side_event_state *state,
1956         const struct side_arg_vec *side_arg_vec);
1957 void side_call_variadic(const struct side_event_state *state,
1958         const struct side_arg_vec *side_arg_vec,
1959         const struct side_arg_dynamic_struct *var_struct);
1960
1961 struct side_events_register_handle *side_events_register(struct side_event_description **events,
1962                 uint32_t nr_events);
1963 void side_events_unregister(struct side_events_register_handle *handle);
1964
1965 /*
1966  * Userspace tracer registration API. This allows userspace tracers to
1967  * register event notification callbacks to be notified of the currently
1968  * registered instrumentation, and to register their callbacks to
1969  * specific events.
1970  */
1971 typedef void (*side_tracer_callback_func)(const struct side_event_description *desc,
1972                         const struct side_arg_vec *side_arg_vec,
1973                         void *priv);
1974 typedef void (*side_tracer_callback_variadic_func)(const struct side_event_description *desc,
1975                         const struct side_arg_vec *side_arg_vec,
1976                         const struct side_arg_dynamic_struct *var_struct,
1977                         void *priv);
1978
1979 int side_tracer_callback_register(struct side_event_description *desc,
1980                 side_tracer_callback_func call,
1981                 void *priv);
1982 int side_tracer_callback_variadic_register(struct side_event_description *desc,
1983                 side_tracer_callback_variadic_func call_variadic,
1984                 void *priv);
1985 int side_tracer_callback_unregister(struct side_event_description *desc,
1986                 side_tracer_callback_func call,
1987                 void *priv);
1988 int side_tracer_callback_variadic_unregister(struct side_event_description *desc,
1989                 side_tracer_callback_variadic_func call_variadic,
1990                 void *priv);
1991
1992 enum side_tracer_notification {
1993         SIDE_TRACER_NOTIFICATION_INSERT_EVENTS,
1994         SIDE_TRACER_NOTIFICATION_REMOVE_EVENTS,
1995 };
1996
1997 /* Callback is invoked with side library internal lock held. */
1998 struct side_tracer_handle *side_tracer_event_notification_register(
1999                 void (*cb)(enum side_tracer_notification notif,
2000                         struct side_event_description **events, uint32_t nr_events, void *priv),
2001                 void *priv);
2002 void side_tracer_event_notification_unregister(struct side_tracer_handle *handle);
2003
2004 /*
2005  * Explicit hooks to initialize/finalize the side instrumentation
2006  * library. Those are also library constructor/destructor.
2007  */
2008 void side_init(void) __attribute__((constructor));
2009 void side_exit(void) __attribute__((destructor));
2010
2011 /*
2012  * The following constructors/destructors perform automatic registration
2013  * of the declared side events. Those may have to be called explicitly
2014  * in a statically linked library.
2015  */
2016
2017 /*
2018  * These weak symbols, the constructor, and destructor take care of
2019  * registering only _one_ instance of the side instrumentation per
2020  * shared-ojbect (or for the whole main program).
2021  */
2022 extern struct side_event_description * __start_side_event_description_ptr[]
2023         __attribute__((weak, visibility("hidden")));
2024 extern struct side_event_description * __stop_side_event_description_ptr[]
2025         __attribute__((weak, visibility("hidden")));
2026 int side_event_description_ptr_registered
2027         __attribute__((weak, visibility("hidden")));
2028 struct side_events_register_handle *side_events_handle
2029         __attribute__((weak, visibility("hidden")));
2030
2031 static void
2032 side_event_description_ptr_init(void)
2033         __attribute__((no_instrument_function))
2034         __attribute__((constructor));
2035 static void
2036 side_event_description_ptr_init(void)
2037 {
2038         if (side_event_description_ptr_registered++)
2039                 return;
2040         side_events_handle = side_events_register(__start_side_event_description_ptr,
2041                 __stop_side_event_description_ptr - __start_side_event_description_ptr);
2042 }
2043
2044 static void
2045 side_event_description_ptr_exit(void)
2046         __attribute__((no_instrument_function))
2047         __attribute__((destructor));
2048 static void
2049 side_event_description_ptr_exit(void)
2050 {
2051         if (--side_event_description_ptr_registered)
2052                 return;
2053         side_events_unregister(side_events_handle);
2054         side_events_handle = NULL;
2055 }
2056
2057 #ifdef __cplusplus
2058 }
2059 #endif
2060
2061 #endif /* _SIDE_TRACE_H */