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/* $OpenBSD: itype.h,v 1.5 2019/11/11 19:10:35 mpi Exp $ */
/*
* Copyright (c) 2016-2017 Martin Pieuchot
* Copyright (c) 2016 Jasper Lievisse Adriaanse <jasper@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _ITTYPE_H_
#define _ITTYPE_H_
#define ITNAME_MAX 128
struct imember;
struct itref;
/*
* Internal type representation.
*
* Some bits of DWARF that we want to keep around to resolve types and
* variables to their intrinsics.
*/
struct itype {
TAILQ_ENTRY(itype) it_next; /* itype: global queue of types */
TAILQ_ENTRY(itype) it_symb; /* itype: global queue of symbol */
RB_ENTRY(itype) it_node; /* itype: per-type tree of types */
SIMPLEQ_HEAD(, itref) it_refs; /* itype: backpointing refs */
TAILQ_HEAD(, imember) it_members;/* itype: members of struct/union */
size_t it_off; /* DWARF: matching .abbrev offset */
uint64_t it_ref; /* DWARF: CU offset of ref. type */
struct itype *it_refp; /* itype: resolved type */
char it_name[ITNAME_MAX];/* CTF: type name */
uint32_t it_size; /* CTF: size in byte or bits */
uint32_t it_nelems; /* CTF: # of members or arguments */
uint16_t it_enc; /* CTF: base type encoding */
uint16_t it_idx; /* CTF: generated type ID */
uint16_t it_type; /* CTF: type */
uint8_t __pad[2];
unsigned int it_flags; /* itype: parser flags */
#define ITF_UNRES 0x01 /* needs to be resolved */
#define ITF_UNRES_MEMB 0x02 /* members need to be resolved */
#define ITF_FUNC 0x04 /* is a function */
#define ITF_OBJ 0x08 /* is an object */
#define ITF_FORWARD 0x10 /* is a forward declaration */
#define ITF_INSERTED 0x20 /* already found/inserted */
#define ITF_USED 0x40 /* referenced in the current CU */
#define ITF_ANON 0x80 /* type without name */
#define ITF_MASK (ITF_INSERTED|ITF_USED)
};
/*
* Member for types with a variable length (struct, array, etc).
*/
struct imember {
TAILQ_ENTRY(imember) im_next;
char im_name[ITNAME_MAX]; /* struct field name */
size_t im_ref; /* CU offset of the field type */
size_t im_off; /* field offset in struct/union */
struct itype *im_refp; /* resolved CTF type */
unsigned int im_flags; /* parser flags */
#define IMF_ANON 0x01 /* member without name */
};
/*
* Used to build a list of backpointing references to speed up
* merging duplicated types.
*/
struct itref {
SIMPLEQ_ENTRY(itref) ir_next;
struct itype *ir_itp;
};
TAILQ_HEAD(itype_queue, itype);
RB_HEAD(isymb_tree, itype);
/* lists of types, functions & data objects */
extern struct itype_queue itypeq, ifuncq, iobjq;
extern struct isymb_tree isymbt; /* tree of symbols */
extern uint16_t tidx; /* type index */
extern uint16_t long_tidx; /* type ID for "long" */
RB_PROTOTYPE(isymb_tree, itype, it_node, it_name_cmp);
struct itype *it_dup(struct itype *);
const char *it_name(struct itype *);
const char *im_name(struct imember *);
#endif /*_ITTYPE_H_ */
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