[thirdparty/binutils-gdb.git] / binutils / dwarf.h

/* dwarf.h - DWARF support header file
   Copyright (C) 2005-2023 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "dwarf2.h" /* for enum dwarf_unit_type */

/* Structure found in the .debug_line section.  */
typedef struct
{
  uint64_t li_length;
  uint16_t li_version;
  uint8_t  li_address_size;
  uint8_t  li_segment_size;
  uint64_t li_prologue_length;
  uint8_t  li_min_insn_length;
  uint8_t  li_max_ops_per_insn;
  uint8_t  li_default_is_stmt;
  int8_t   li_line_base;
  uint8_t  li_line_range;
  uint8_t  li_opcode_base;
  /* Not part of the header.  4 for 32-bit dwarf, 8 for 64-bit.  */
  unsigned int li_offset_size;
}
DWARF2_Internal_LineInfo;

/* Structure found in .debug_pubnames section.  */
typedef struct
{
  uint64_t	 pn_length;
  unsigned short pn_version;
  uint64_t	 pn_offset;
  uint64_t	 pn_size;
}
DWARF2_Internal_PubNames;

/* Structure found in .debug_info section.  */
typedef struct
{
  uint64_t	 cu_length;
  unsigned short cu_version;
  uint64_t	 cu_abbrev_offset;
  unsigned char  cu_pointer_size;
  enum dwarf_unit_type cu_unit_type;
}
DWARF2_Internal_CompUnit;

/* Structure found in .debug_aranges section.  */
typedef struct
{
  uint64_t	 ar_length;
  unsigned short ar_version;
  uint64_t	 ar_info_offset;
  unsigned char  ar_pointer_size;
  unsigned char  ar_segment_size;
}
DWARF2_Internal_ARange;

/* N.B. The order here must match the order in debug_displays.  */

enum dwarf_section_display_enum
{
  abbrev = 0,
  aranges,
  frame,
  info,
  line,
  pubnames,
  gnu_pubnames,
  eh_frame,
  macinfo,
  macro,
  str,
  line_str,
  loc,
  loclists,
  loclists_dwo,
  pubtypes,
  gnu_pubtypes,
  ranges,
  rnglists,
  rnglists_dwo,
  static_func,
  static_vars,
  types,
  weaknames,
  gdb_index,
  debug_names,
  trace_info,
  trace_abbrev,
  trace_aranges,
  info_dwo,
  abbrev_dwo,
  types_dwo,
  line_dwo,
  loc_dwo,
  macro_dwo,
  macinfo_dwo,
  str_dwo,
  str_index,
  str_index_dwo,
  debug_addr,
  dwp_cu_index,
  dwp_tu_index,
  gnu_debuglink,
  gnu_debugaltlink,
  debug_sup,
  separate_debug_str,
  note_gnu_build_id,
  max
};

struct dwarf_section
{
  /* A debug section has a different name when it's stored compressed
     or not.  XCOFF DWARF section also have a special name.
     COMPRESSED_NAME, UNCOMPRESSED_NAME and XCOFF_NAME are the three
     possibilities.  NAME is set to whichever one is used for this
     input file, as determined by load_debug_section().  */
  const char *                     uncompressed_name;
  const char *                     compressed_name;
  const char *                     xcoff_name;
  const char *                     name;
  /* If non-NULL then FILENAME is the name of the separate debug info
     file containing the section.  */
  const char *                     filename;
  unsigned char *                  start;
  uint64_t                         address;
  uint64_t                         size;
  enum dwarf_section_display_enum  abbrev_sec;
  /* Used by clients to help them implement the reloc_at callback.  */
  void *                           reloc_info;
  uint64_t                         num_relocs;
};

/* A structure containing the name of a debug section
   and a pointer to a function that can decode it.  */
struct dwarf_section_display
{
  struct dwarf_section section;
  int (*display) (struct dwarf_section *, void *);
  int *enabled;
  bool relocate;
};

extern struct dwarf_section_display debug_displays [];

/* This structure records the information that
   we extract from the.debug_info section.  */
typedef struct
{
  unsigned int   pointer_size;
  unsigned int   offset_size;
  int            dwarf_version;
  uint64_t	 cu_offset;
  uint64_t	 base_address;
  /* This field is filled in when reading the attribute DW_AT_GNU_addr_base and
     is used with the form DW_FORM_GNU_addr_index.  */
  uint64_t	 addr_base;
  /* This field is filled in when reading the attribute DW_AT_GNU_ranges_base and
     is used when calculating ranges.  */
  uint64_t	 ranges_base;
  /* This is an array of offsets to the location list table.  */
  uint64_t *	 loc_offsets;
  /* This is an array of offsets to the location view table.  */
  uint64_t *	 loc_views;
  int *          have_frame_base;

  /* Information for associating location lists with CUs.  */
  unsigned int   num_loc_offsets;
  unsigned int   max_loc_offsets;
  unsigned int   num_loc_views;
  uint64_t	 loclists_base;

  /* List of .debug_ranges offsets seen in this .debug_info.  */
  uint64_t *	 range_lists;
  unsigned int   num_range_lists;
  unsigned int   max_range_lists;
  uint64_t	 rnglists_base;
  uint64_t	 str_offsets_base;
}
debug_info;

typedef struct separate_info
{
  void *                  handle;    /* The pointer returned by open_debug_file().  */
  const char *            filename;
  struct separate_info *  next;
} separate_info;

extern separate_info * first_separate_info;

extern unsigned int eh_addr_size;

extern int do_debug_info;
extern int do_debug_abbrevs;
extern int do_debug_lines;
extern int do_debug_pubnames;
extern int do_debug_pubtypes;
extern int do_debug_aranges;
extern int do_debug_ranges;
extern int do_debug_frames;
extern int do_debug_frames_interp;
extern int do_debug_macinfo;
extern int do_debug_str;
extern int do_debug_str_offsets;
extern int do_debug_loc;
extern int do_gdb_index;
extern int do_trace_info;
extern int do_trace_abbrevs;
extern int do_trace_aranges;
extern int do_debug_addr;
extern int do_debug_cu_index;
extern int do_wide;
extern int do_debug_links;
extern int do_follow_links;
#ifdef HAVE_LIBDEBUGINFOD
extern int use_debuginfod;
#endif
extern bool do_checks;

extern int dwarf_cutoff_level;
extern unsigned long dwarf_start_die;

extern int dwarf_check;

extern void init_dwarf_regnames_by_elf_machine_code (unsigned int);
extern void init_dwarf_regnames_by_bfd_arch_and_mach (enum bfd_architecture arch,
						      unsigned long mach);

extern bool load_debug_section (enum dwarf_section_display_enum, void *);
extern void free_debug_section (enum dwarf_section_display_enum);
extern bool load_separate_debug_files (void *, const char *);
extern void close_debug_file (void *);
extern void *open_debug_file (const char *);

extern void free_debug_memory (void);

extern int dwarf_select_sections_by_names (const char *);
extern int dwarf_select_sections_by_letters (const char *);
extern void dwarf_select_sections_all (void);

extern unsigned int * find_cu_tu_set (void *, unsigned int);

extern void * cmalloc (uint64_t, size_t);
extern void * xcalloc2 (uint64_t, size_t);
extern void * xcmalloc (uint64_t, size_t);
extern void * xcrealloc (void *, uint64_t, size_t);

/* A callback into the client.  Returns TRUE if there is a
   relocation against the given debug section at the given
   offset.  */
extern bool reloc_at (struct dwarf_section *, uint64_t);

extern uint64_t read_leb128 (unsigned char *, const unsigned char *const,
			     bool, unsigned int *, int *);

#if HAVE_LIBDEBUGINFOD
extern unsigned char * get_build_id (void *);
#endif

static inline void
report_leb_status (int status)
{
  if ((status & 1) != 0)
    error (_("end of data encountered whilst reading LEB\n"));
  else if ((status & 2) != 0)
    error (_("read LEB value is too large to store in destination variable\n"));
}

#define SKIP_ULEB(start, end)					\
  do								\
    {								\
      unsigned int _len;					\
      read_leb128 (start, end, false, &_len, NULL);		\
      start += _len;						\
    }								\
  while (0)

#define SKIP_SLEB(start, end)					\
  do								\
    {								\
      unsigned int _len;					\
      read_leb128 (start, end, true, &_len, NULL);		\
      start += _len;						\
    }								\
  while (0)

#define READ_ULEB(var, start, end)				\
  do								\
    {								\
      uint64_t _val;						\
      unsigned int _len;					\
      int _status;						\
								\
      _val = read_leb128 (start, end, false, &_len, &_status);	\
      start += _len;						\
      (var) = _val;						\
      if ((var) != _val)					\
	_status |= 2;						\
      report_leb_status (_status);				\
    }								\
  while (0)

#define READ_SLEB(var, start, end)				\
  do								\
    {								\
      int64_t _val;						\
      unsigned int _len;					\
      int _status;						\
								\
      _val = read_leb128 (start, end, true, &_len, &_status);	\
      start += _len;						\
      (var) = _val;						\
      if ((var) != _val)					\
	_status |= 2;						\
      report_leb_status (_status);				\
    }								\
  while (0)
Commit	Line	Data
1b315056	1	/* dwarf.h - DWARF support header file
d87bef3a	2	Copyright (C) 2005-2023 Free Software Foundation, Inc.
19e6b90e	3
32866df7	4	This file is part of GNU Binutils.
19e6b90e	5
32866df7 NC	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 3 of the License, or
	9	(at your option) any later version.
19e6b90e	10
32866df7 NC	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
19e6b90e	15
32866df7 NC	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	19	MA 02110-1301, USA. */
19e6b90e	20
77145576 JK	21	#include "dwarf2.h" /* for enum dwarf_unit_type */
77145576 JK	22
47704ddf	23	/* Structure found in the .debug_line section. */
47704ddf KT	24	typedef struct
47704ddf KT	25	{
329dd2b6 AM	26	uint64_t li_length;
	27	uint16_t li_version;
	28	uint8_t li_address_size;
	29	uint8_t li_segment_size;
	30	uint64_t li_prologue_length;
	31	uint8_t li_min_insn_length;
	32	uint8_t li_max_ops_per_insn;
	33	uint8_t li_default_is_stmt;
	34	int8_t li_line_base;
	35	uint8_t li_line_range;
	36	uint8_t li_opcode_base;
	37	/* Not part of the header. 4 for 32-bit dwarf, 8 for 64-bit. */
	38	unsigned int li_offset_size;
47704ddf KT	39	}
	40	DWARF2_Internal_LineInfo;
	41
	42	/* Structure found in .debug_pubnames section. */
47704ddf KT	43	typedef struct
47704ddf KT	44	{
31e5a3a3	45	uint64_t pn_length;
47704ddf	46	unsigned short pn_version;
31e5a3a3 AM	47	uint64_t pn_offset;
31e5a3a3 AM	48	uint64_t pn_size;
47704ddf KT	49	}
	50	DWARF2_Internal_PubNames;
	51
	52	/* Structure found in .debug_info section. */
47704ddf KT	53	typedef struct
47704ddf KT	54	{
31e5a3a3	55	uint64_t cu_length;
47704ddf	56	unsigned short cu_version;
31e5a3a3	57	uint64_t cu_abbrev_offset;
47704ddf	58	unsigned char cu_pointer_size;
77145576	59	enum dwarf_unit_type cu_unit_type;
47704ddf KT	60	}
	61	DWARF2_Internal_CompUnit;
	62
77ef8654	63	/* Structure found in .debug_aranges section. */
47704ddf KT	64	typedef struct
47704ddf KT	65	{
31e5a3a3	66	uint64_t ar_length;
47704ddf	67	unsigned short ar_version;
31e5a3a3	68	uint64_t ar_info_offset;
47704ddf KT	69	unsigned char ar_pointer_size;
	70	unsigned char ar_segment_size;
	71	}
	72	DWARF2_Internal_ARange;
	73
459d52c8 DE	74	/* N.B. The order here must match the order in debug_displays. */
459d52c8 DE	75
c34f4fc6 NC	76	enum dwarf_section_display_enum
c34f4fc6 NC	77	{
19e6b90e L	78	abbrev = 0,
	79	aranges,
	80	frame,
	81	info,
	82	line,
	83	pubnames,
459d52c8	84	gnu_pubnames,
19e6b90e L	85	eh_frame,
19e6b90e L	86	macinfo,
4ccf1e31	87	macro,
19e6b90e	88	str,
77145576	89	line_str,
19e6b90e	90	loc,
d4620bee	91	loclists,
4694a0e5	92	loclists_dwo,
19e6b90e	93	pubtypes,
459d52c8	94	gnu_pubtypes,
19e6b90e	95	ranges,
d4620bee	96	rnglists,
4694a0e5	97	rnglists_dwo,
19e6b90e L	98	static_func,
	99	static_vars,
	100	types,
	101	weaknames,
48049d1e	102	gdb_index,
61364358	103	debug_names,
6f875884 TG	104	trace_info,
	105	trace_abbrev,
	106	trace_aranges,
4723351a CC	107	info_dwo,
	108	abbrev_dwo,
	109	types_dwo,
	110	line_dwo,
	111	loc_dwo,
	112	macro_dwo,
	113	macinfo_dwo,
	114	str_dwo,
	115	str_index,
	116	str_index_dwo,
	117	debug_addr,
657d0d47 CC	118	dwp_cu_index,
657d0d47 CC	119	dwp_tu_index,
dda8d76d NC	120	gnu_debuglink,
dda8d76d NC	121	gnu_debugaltlink,
e38332c2	122	debug_sup,
dda8d76d	123	separate_debug_str,
61ab1364	124	note_gnu_build_id,
19e6b90e L	125	max
	126	};
	127
4723351a CC	128	struct dwarf_section
	129	{
	130	/* A debug section has a different name when it's stored compressed
51d29b8c CC	131	or not. XCOFF DWARF section also have a special name.
51d29b8c CC	132	COMPRESSED_NAME, UNCOMPRESSED_NAME and XCOFF_NAME are the three
4723351a CC	133	possibilities. NAME is set to whichever one is used for this
4723351a CC	134	input file, as determined by load_debug_section(). */
dda8d76d NC	135	const char * uncompressed_name;
dda8d76d NC	136	const char * compressed_name;
51d29b8c	137	const char * xcoff_name;
dda8d76d NC	138	const char * name;
	139	/* If non-NULL then FILENAME is the name of the separate debug info
	140	file containing the section. */
	141	const char * filename;
	142	unsigned char * start;
31e5a3a3 AM	143	uint64_t address;
31e5a3a3 AM	144	uint64_t size;
dda8d76d	145	enum dwarf_section_display_enum abbrev_sec;
d1c4b12b	146	/* Used by clients to help them implement the reloc_at callback. */
dda8d76d	147	void * reloc_info;
26c527e6	148	uint64_t num_relocs;
4723351a CC	149	};
	150
	151	/* A structure containing the name of a debug section
	152	and a pointer to a function that can decode it. */
	153	struct dwarf_section_display
	154	{
015dc7e1 AM	155	struct dwarf_section section;
	156	int (display) (struct dwarf_section , void *);
	157	int *enabled;
	158	bool relocate;
4723351a CC	159	};
4723351a CC	160
19e6b90e L	161	extern struct dwarf_section_display debug_displays [];
	162
	163	/* This structure records the information that
	164	we extract from the.debug_info section. */
	165	typedef struct
	166	{
	167	unsigned int pointer_size;
b7807392 JJ	168	unsigned int offset_size;
b7807392 JJ	169	int dwarf_version;
31e5a3a3 AM	170	uint64_t cu_offset;
31e5a3a3 AM	171	uint64_t base_address;
4723351a	172	/* This field is filled in when reading the attribute DW_AT_GNU_addr_base and
528a4f87	173	is used with the form DW_FORM_GNU_addr_index. */
31e5a3a3	174	uint64_t addr_base;
4723351a CC	175	/* This field is filled in when reading the attribute DW_AT_GNU_ranges_base and
4723351a CC	176	is used when calculating ranges. */
31e5a3a3	177	uint64_t ranges_base;
19e6b90e	178	/* This is an array of offsets to the location list table. */
31e5a3a3	179	uint64_t * loc_offsets;
9f272209	180	/* This is an array of offsets to the location view table. */
31e5a3a3	181	uint64_t * loc_views;
467c65bc	182	int * have_frame_base;
19c26da6 NC	183
19c26da6 NC	184	/* Information for associating location lists with CUs. */
19e6b90e L	185	unsigned int num_loc_offsets;
19e6b90e L	186	unsigned int max_loc_offsets;
9f272209	187	unsigned int num_loc_views;
31e5a3a3	188	uint64_t loclists_base;
19c26da6	189
01a8f077	190	/* List of .debug_ranges offsets seen in this .debug_info. */
31e5a3a3	191	uint64_t * range_lists;
19e6b90e L	192	unsigned int num_range_lists;
19e6b90e L	193	unsigned int max_range_lists;
31e5a3a3 AM	194	uint64_t rnglists_base;
31e5a3a3 AM	195	uint64_t str_offsets_base;
19e6b90e L	196	}
	197	debug_info;
	198
24841daa NC	199	typedef struct separate_info
	200	{
	201	void * handle; /* The pointer returned by open_debug_file(). */
	202	const char * filename;
	203	struct separate_info * next;
	204	} separate_info;
	205
	206	extern separate_info * first_separate_info;
	207
77ef8654	208	extern unsigned int eh_addr_size;
19e6b90e L	209
	210	extern int do_debug_info;
	211	extern int do_debug_abbrevs;
	212	extern int do_debug_lines;
	213	extern int do_debug_pubnames;
f9f0e732	214	extern int do_debug_pubtypes;
19e6b90e L	215	extern int do_debug_aranges;
	216	extern int do_debug_ranges;
	217	extern int do_debug_frames;
	218	extern int do_debug_frames_interp;
	219	extern int do_debug_macinfo;
	220	extern int do_debug_str;
e4b7104b	221	extern int do_debug_str_offsets;
19e6b90e	222	extern int do_debug_loc;
5bbdf3d5	223	extern int do_gdb_index;
6f875884 TG	224	extern int do_trace_info;
	225	extern int do_trace_abbrevs;
	226	extern int do_trace_aranges;
657d0d47 CC	227	extern int do_debug_addr;
657d0d47 CC	228	extern int do_debug_cu_index;
c34f4fc6	229	extern int do_wide;
dda8d76d	230	extern int do_debug_links;
39f0547e	231	extern int do_follow_links;
bed566bb NC	232	#ifdef HAVE_LIBDEBUGINFOD
	233	extern int use_debuginfod;
	234	#endif
015dc7e1	235	extern bool do_checks;
19e6b90e	236
fd2f0033 TT	237	extern int dwarf_cutoff_level;
	238	extern unsigned long dwarf_start_die;
	239
4723351a CC	240	extern int dwarf_check;
4723351a CC	241
955ff7fc	242	extern void init_dwarf_regnames_by_elf_machine_code (unsigned int);
229a22cf AB	243	extern void init_dwarf_regnames_by_bfd_arch_and_mach (enum bfd_architecture arch,
229a22cf AB	244	unsigned long mach);
2dc4cec1	245
015dc7e1 AM	246	extern bool load_debug_section (enum dwarf_section_display_enum, void *);
	247	extern void free_debug_section (enum dwarf_section_display_enum);
	248	extern bool load_separate_debug_files (void , const char );
	249	extern void close_debug_file (void *);
	250	extern void open_debug_file (const char );
19e6b90e L	251
	252	extern void free_debug_memory (void);
	253
94585d6d NC	254	extern int dwarf_select_sections_by_names (const char *);
94585d6d NC	255	extern int dwarf_select_sections_by_letters (const char *);
4cb93e3b TG	256	extern void dwarf_select_sections_all (void);
4cb93e3b TG	257
82b1b41b	258	extern unsigned int * find_cu_tu_set (void *, unsigned int);
657d0d47	259
26c527e6 AM	260	extern void * cmalloc (uint64_t, size_t);
	261	extern void * xcalloc2 (uint64_t, size_t);
	262	extern void * xcmalloc (uint64_t, size_t);
	263	extern void * xcrealloc (void *, uint64_t, size_t);
19e6b90e	264
222c2bf0	265	/* A callback into the client. Returns TRUE if there is a
d1c4b12b NC	266	relocation against the given debug section at the given
d1c4b12b NC	267	offset. */
31e5a3a3	268	extern bool reloc_at (struct dwarf_section *, uint64_t);
cd30bcef	269
31e5a3a3 AM	270	extern uint64_t read_leb128 (unsigned char , const unsigned char const,
31e5a3a3 AM	271	bool, unsigned int , int );
cd30bcef	272
301a9420 AM	273	#if HAVE_LIBDEBUGINFOD
	274	extern unsigned char * get_build_id (void *);
	275	#endif
	276
cd30bcef	277	static inline void
9039747f	278	report_leb_status (int status)
cd30bcef AM	279	{
cd30bcef AM	280	if ((status & 1) != 0)
9039747f	281	error (_("end of data encountered whilst reading LEB\n"));
cd30bcef	282	else if ((status & 2) != 0)
9039747f	283	error (_("read LEB value is too large to store in destination variable\n"));
cd30bcef AM	284	}
	285
	286	#define SKIP_ULEB(start, end) \
	287	do \
	288	{ \
	289	unsigned int _len; \
015dc7e1	290	read_leb128 (start, end, false, &_len, NULL); \
cd30bcef	291	start += _len; \
1b513401 NC	292	} \
1b513401 NC	293	while (0)
cd30bcef AM	294
	295	#define SKIP_SLEB(start, end) \
	296	do \
	297	{ \
	298	unsigned int _len; \
015dc7e1	299	read_leb128 (start, end, true, &_len, NULL); \
cd30bcef	300	start += _len; \
1b513401 NC	301	} \
1b513401 NC	302	while (0)
cd30bcef AM	303
	304	#define READ_ULEB(var, start, end) \
	305	do \
	306	{ \
31e5a3a3	307	uint64_t _val; \
cd30bcef AM	308	unsigned int _len; \
	309	int _status; \
	310	\
015dc7e1	311	_val = read_leb128 (start, end, false, &_len, &_status); \
cd30bcef AM	312	start += _len; \
	313	(var) = _val; \
	314	if ((var) != _val) \
	315	_status \|= 2; \
9039747f	316	report_leb_status (_status); \
1b513401 NC	317	} \
1b513401 NC	318	while (0)
cd30bcef AM	319
	320	#define READ_SLEB(var, start, end) \
	321	do \
	322	{ \
31e5a3a3	323	int64_t _val; \
cd30bcef AM	324	unsigned int _len; \
	325	int _status; \
	326	\
015dc7e1	327	_val = read_leb128 (start, end, true, &_len, &_status); \
cd30bcef AM	328	start += _len; \
	329	(var) = _val; \
	330	if ((var) != _val) \
	331	_status \|= 2; \
9039747f	332	report_leb_status (_status); \
1b513401 NC	333	} \
1b513401 NC	334	while (0)