blob: 1e7f4db7b7c890bea45ea6866808fcbcb204f393 [file] [log] [blame]
/* dwarf.c -- display DWARF contents of a BFD binary file
Copyright (C) 2005-2021 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 "sysdep.h"
#include "libiberty.h"
#include "bfd.h"
#include <stdint.h>
#include "bucomm.h"
#include "elfcomm.h"
#include "elf/common.h"
#include "dwarf2.h"
#include "dwarf.h"
#include "gdb/gdb-index.h"
#include "filenames.h"
#include "safe-ctype.h"
#include <assert.h>
#ifdef HAVE_LIBDEBUGINFOD
#include <elfutils/debuginfod.h>
#endif
#include <limits.h>
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
#ifndef ENABLE_CHECKING
#define ENABLE_CHECKING 0
#endif
#undef MAX
#undef MIN
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
static const char *regname (unsigned int regno, int row);
static const char *regname_internal_by_table_only (unsigned int regno);
static int have_frame_base;
static int need_base_address;
static unsigned int num_debug_info_entries = 0;
static unsigned int alloc_num_debug_info_entries = 0;
static debug_info *debug_information = NULL;
/* Special value for num_debug_info_entries to indicate
that the .debug_info section could not be loaded/parsed. */
#define DEBUG_INFO_UNAVAILABLE (unsigned int) -1
/* A .debug_info section can contain multiple links to separate
DWO object files. We use these structures to record these links. */
typedef enum dwo_type
{
DWO_NAME,
DWO_DIR,
DWO_ID
} dwo_type;
typedef struct dwo_info
{
dwo_type type;
const char * value;
dwarf_vma cu_offset;
struct dwo_info * next;
} dwo_info;
static dwo_info *first_dwo_info = NULL;
static bool need_dwo_info;
separate_info * first_separate_info = NULL;
unsigned int eh_addr_size;
int do_debug_info;
int do_debug_abbrevs;
int do_debug_lines;
int do_debug_pubnames;
int do_debug_pubtypes;
int do_debug_aranges;
int do_debug_ranges;
int do_debug_frames;
int do_debug_frames_interp;
int do_debug_macinfo;
int do_debug_str;
int do_debug_str_offsets;
int do_debug_loc;
int do_gdb_index;
int do_trace_info;
int do_trace_abbrevs;
int do_trace_aranges;
int do_debug_addr;
int do_debug_cu_index;
int do_wide;
int do_debug_links;
int do_follow_links = DEFAULT_FOR_FOLLOW_LINKS;
bool do_checks;
int dwarf_cutoff_level = -1;
unsigned long dwarf_start_die;
int dwarf_check = 0;
/* Convenient constant, to avoid having to cast -1 to dwarf_vma when
testing whether e.g. a locview list is present. */
static const dwarf_vma vm1 = -1;
/* Collection of CU/TU section sets from .debug_cu_index and .debug_tu_index
sections. For version 1 package files, each set is stored in SHNDX_POOL
as a zero-terminated list of section indexes comprising one set of debug
sections from a .dwo file. */
static unsigned int *shndx_pool = NULL;
static unsigned int shndx_pool_size = 0;
static unsigned int shndx_pool_used = 0;
/* For version 2 package files, each set contains an array of section offsets
and an array of section sizes, giving the offset and size of the
contribution from a CU or TU within one of the debug sections.
When displaying debug info from a package file, we need to use these
tables to locate the corresponding contributions to each section. */
struct cu_tu_set
{
uint64_t signature;
dwarf_vma section_offsets[DW_SECT_MAX];
size_t section_sizes[DW_SECT_MAX];
};
static int cu_count = 0;
static int tu_count = 0;
static struct cu_tu_set *cu_sets = NULL;
static struct cu_tu_set *tu_sets = NULL;
static bool load_cu_tu_indexes (void *);
/* An array that indicates for a given level of CU nesting whether
the latest DW_AT_type seen for that level was a signed type or
an unsigned type. */
#define MAX_CU_NESTING (1 << 8)
static bool level_type_signed[MAX_CU_NESTING];
/* Values for do_debug_lines. */
#define FLAG_DEBUG_LINES_RAW 1
#define FLAG_DEBUG_LINES_DECODED 2
static unsigned int
size_of_encoded_value (int encoding)
{
switch (encoding & 0x7)
{
default: /* ??? */
case 0: return eh_addr_size;
case 2: return 2;
case 3: return 4;
case 4: return 8;
}
}
static dwarf_vma
get_encoded_value (unsigned char **pdata,
int encoding,
struct dwarf_section *section,
unsigned char * end)
{
unsigned char * data = * pdata;
unsigned int size = size_of_encoded_value (encoding);
dwarf_vma val;
if (data >= end || size > (size_t) (end - data))
{
warn (_("Encoded value extends past end of section\n"));
* pdata = end;
return 0;
}
/* PR 17512: file: 002-829853-0.004. */
if (size > 8)
{
warn (_("Encoded size of %d is too large to read\n"), size);
* pdata = end;
return 0;
}
/* PR 17512: file: 1085-5603-0.004. */
if (size == 0)
{
warn (_("Encoded size of 0 is too small to read\n"));
* pdata = end;
return 0;
}
if (encoding & DW_EH_PE_signed)
val = byte_get_signed (data, size);
else
val = byte_get (data, size);
if ((encoding & 0x70) == DW_EH_PE_pcrel)
val += section->address + (data - section->start);
* pdata = data + size;
return val;
}
#if SIZEOF_LONG_LONG > SIZEOF_LONG
# ifndef __MINGW32__
# define DWARF_VMA_FMT "ll"
# define DWARF_VMA_FMT_LONG "%16.16llx"
# else
# define DWARF_VMA_FMT "I64"
# define DWARF_VMA_FMT_LONG "%016I64x"
# endif
#else
# define DWARF_VMA_FMT "l"
# define DWARF_VMA_FMT_LONG "%16.16lx"
#endif
/* Convert a dwarf vma value into a string. Returns a pointer to a static
buffer containing the converted VALUE. The value is converted according
to the printf formating character FMTCH. If NUM_BYTES is non-zero then
it specifies the maximum number of bytes to be displayed in the converted
value and FMTCH is ignored - hex is always used. */
static const char *
dwarf_vmatoa_1 (const char *fmtch, dwarf_vma value, unsigned num_bytes)
{
/* As dwarf_vmatoa is used more then once in a printf call
for output, we are cycling through an fixed array of pointers
for return address. */
static int buf_pos = 0;
static struct dwarf_vmatoa_buf
{
char place[64];
} buf[16];
char *ret;
ret = buf[buf_pos++].place;
buf_pos %= ARRAY_SIZE (buf);
if (num_bytes)
{
/* Printf does not have a way of specifying a maximum field width for an
integer value, so we print the full value into a buffer and then select
the precision we need. */
snprintf (ret, sizeof (buf[0].place), DWARF_VMA_FMT_LONG, value);
if (num_bytes > 8)
num_bytes = 8;
return ret + (16 - 2 * num_bytes);
}
else
{
char fmt[32];
if (fmtch)
sprintf (fmt, "%%%s%s", DWARF_VMA_FMT, fmtch);
else
sprintf (fmt, "%%%s", DWARF_VMA_FMT);
snprintf (ret, sizeof (buf[0].place), fmt, value);
return ret;
}
}
static inline const char *
dwarf_vmatoa (const char * fmtch, dwarf_vma value)
{
return dwarf_vmatoa_1 (fmtch, value, 0);
}
/* Print a dwarf_vma value (typically an address, offset or length) in
hexadecimal format, followed by a space. The length of the VALUE (and
hence the precision displayed) is determined by the NUM_BYTES parameter. */
static void
print_dwarf_vma (dwarf_vma value, unsigned num_bytes)
{
printf ("%s ", dwarf_vmatoa_1 (NULL, value, num_bytes));
}
/* Print a view number in hexadecimal value, with the same width
print_dwarf_vma would have printed it with the same num_bytes.
Print blanks for zero view, unless force is nonzero. */
static void
print_dwarf_view (dwarf_vma value, unsigned num_bytes, int force)
{
int len;
if (!num_bytes)
len = 4;
else
len = num_bytes * 2;
assert (value == (unsigned long) value);
if (value || force)
printf ("v%0*lx ", len - 1, (unsigned long) value);
else
printf ("%*s", len + 1, "");
}
/* Read in a LEB128 encoded value starting at address DATA.
If SIGN is true, return a signed LEB128 value.
If LENGTH_RETURN is not NULL, return in it the number of bytes read.
If STATUS_RETURN is not NULL, return with bit 0 (LSB) set if the
terminating byte was not found and with bit 1 set if the value
overflows a dwarf_vma.
No bytes will be read at address END or beyond. */
dwarf_vma
read_leb128 (unsigned char *data,
const unsigned char *const end,
bool sign,
unsigned int *length_return,
int *status_return)
{
dwarf_vma result = 0;
unsigned int num_read = 0;
unsigned int shift = 0;
int status = 1;
while (data < end)
{
unsigned char byte = *data++;
unsigned char lost, mask;
num_read++;
if (shift < CHAR_BIT * sizeof (result))
{
result |= ((dwarf_vma) (byte & 0x7f)) << shift;
/* These bits overflowed. */
lost = byte ^ (result >> shift);
/* And this is the mask of possible overflow bits. */
mask = 0x7f ^ ((dwarf_vma) 0x7f << shift >> shift);
shift += 7;
}
else
{
lost = byte;
mask = 0x7f;
}
if ((lost & mask) != (sign && (dwarf_signed_vma) result < 0 ? mask : 0))
status |= 2;
if ((byte & 0x80) == 0)
{
status &= ~1;
if (sign && shift < CHAR_BIT * sizeof (result) && (byte & 0x40))
result |= -((dwarf_vma) 1 << shift);
break;
}
}
if (length_return != NULL)
*length_return = num_read;
if (status_return != NULL)
*status_return = status;
return result;
}
/* Read AMOUNT bytes from PTR and store them in VAL.
Checks to make sure that the read will not reach or pass END.
FUNC chooses whether the value read is unsigned or signed, and may
be either byte_get or byte_get_signed. If INC is true, PTR is
incremented after reading the value.
This macro cannot protect against PTR values derived from user input.
The C standard sections 6.5.6 and 6.5.8 say attempts to do so using
pointers is undefined behaviour. */
#define SAFE_BYTE_GET_INTERNAL(VAL, PTR, AMOUNT, END, FUNC, INC) \
do \
{ \
size_t amount = (AMOUNT); \
if (sizeof (VAL) < amount) \
{ \
error (ngettext ("internal error: attempt to read %d byte " \
"of data in to %d sized variable", \
"internal error: attempt to read %d bytes " \
"of data in to %d sized variable", \
amount), \
(int) amount, (int) sizeof (VAL)); \
amount = sizeof (VAL); \
} \
if (ENABLE_CHECKING) \
assert ((PTR) <= (END)); \
size_t avail = (END) - (PTR); \
if ((PTR) > (END)) \
avail = 0; \
if (amount > avail) \
amount = avail; \
if (amount == 0) \
(VAL) = 0; \
else \
(VAL) = (FUNC) ((PTR), amount); \
if (INC) \
(PTR) += amount; \
} \
while (0)
#define SAFE_BYTE_GET(VAL, PTR, AMOUNT, END) \
SAFE_BYTE_GET_INTERNAL (VAL, PTR, AMOUNT, END, byte_get, false)
#define SAFE_BYTE_GET_AND_INC(VAL, PTR, AMOUNT, END) \
SAFE_BYTE_GET_INTERNAL (VAL, PTR, AMOUNT, END, byte_get, true)
#define SAFE_SIGNED_BYTE_GET(VAL, PTR, AMOUNT, END) \
SAFE_BYTE_GET_INTERNAL (VAL, PTR, AMOUNT, END, byte_get_signed, false)
#define SAFE_SIGNED_BYTE_GET_AND_INC(VAL, PTR, AMOUNT, END) \
SAFE_BYTE_GET_INTERNAL (VAL, PTR, AMOUNT, END, byte_get_signed, true)
typedef struct State_Machine_Registers
{
dwarf_vma address;
unsigned int view;
unsigned int file;
unsigned int line;
unsigned int column;
int is_stmt;
int basic_block;
unsigned char op_index;
unsigned char end_sequence;
/* This variable hold the number of the last entry seen
in the File Table. */
unsigned int last_file_entry;
} SMR;
static SMR state_machine_regs;
static void
reset_state_machine (int is_stmt)
{
state_machine_regs.address = 0;
state_machine_regs.view = 0;
state_machine_regs.op_index = 0;
state_machine_regs.file = 1;
state_machine_regs.line = 1;
state_machine_regs.column = 0;
state_machine_regs.is_stmt = is_stmt;
state_machine_regs.basic_block = 0;
state_machine_regs.end_sequence = 0;
state_machine_regs.last_file_entry = 0;
}
/* Handled an extend line op.
Returns the number of bytes read. */
static size_t
process_extended_line_op (unsigned char * data,
int is_stmt,
unsigned char * end)
{
unsigned char op_code;
size_t len, header_len;
unsigned char *name;
unsigned char *orig_data = data;
dwarf_vma adr, val;
READ_ULEB (len, data, end);
header_len = data - orig_data;
if (len == 0 || data >= end || len > (size_t) (end - data))
{
warn (_("Badly formed extended line op encountered!\n"));
return header_len;
}
op_code = *data++;
printf (_(" Extended opcode %d: "), op_code);
switch (op_code)
{
case DW_LNE_end_sequence:
printf (_("End of Sequence\n\n"));
reset_state_machine (is_stmt);
break;
case DW_LNE_set_address:
/* PR 17512: file: 002-100480-0.004. */
if (len - 1 > 8)
{
warn (_("Length (%lu) of DW_LNE_set_address op is too long\n"),
(unsigned long) len - 1);
adr = 0;
}
else
SAFE_BYTE_GET (adr, data, len - 1, end);
printf (_("set Address to 0x%s\n"), dwarf_vmatoa ("x", adr));
state_machine_regs.address = adr;
state_machine_regs.view = 0;
state_machine_regs.op_index = 0;
break;
case DW_LNE_define_file:
printf (_("define new File Table entry\n"));
printf (_(" Entry\tDir\tTime\tSize\tName\n"));
printf (" %d\t", ++state_machine_regs.last_file_entry);
{
size_t l;
name = data;
l = strnlen ((char *) data, end - data);
data += l;
if (data < end)
data++;
READ_ULEB (val, data, end);
printf ("%s\t", dwarf_vmatoa ("u", val));
READ_ULEB (val, data, end);
printf ("%s\t", dwarf_vmatoa ("u", val));
READ_ULEB (val, data, end);
printf ("%s\t", dwarf_vmatoa ("u", val));
printf ("%.*s\n\n", (int) l, name);
}
if (((size_t) (data - orig_data) != len + header_len) || data >= end)
warn (_("DW_LNE_define_file: Bad opcode length\n"));
break;
case DW_LNE_set_discriminator:
READ_ULEB (val, data, end);
printf (_("set Discriminator to %s\n"), dwarf_vmatoa ("u", val));
break;
/* HP extensions. */
case DW_LNE_HP_negate_is_UV_update:
printf ("DW_LNE_HP_negate_is_UV_update\n");
break;
case DW_LNE_HP_push_context:
printf ("DW_LNE_HP_push_context\n");
break;
case DW_LNE_HP_pop_context:
printf ("DW_LNE_HP_pop_context\n");
break;
case DW_LNE_HP_set_file_line_column:
printf ("DW_LNE_HP_set_file_line_column\n");
break;
case DW_LNE_HP_set_routine_name:
printf ("DW_LNE_HP_set_routine_name\n");
break;
case DW_LNE_HP_set_sequence:
printf ("DW_LNE_HP_set_sequence\n");
break;
case DW_LNE_HP_negate_post_semantics:
printf ("DW_LNE_HP_negate_post_semantics\n");
break;
case DW_LNE_HP_negate_function_exit:
printf ("DW_LNE_HP_negate_function_exit\n");
break;
case DW_LNE_HP_negate_front_end_logical:
printf ("DW_LNE_HP_negate_front_end_logical\n");
break;
case DW_LNE_HP_define_proc:
printf ("DW_LNE_HP_define_proc\n");
break;
case DW_LNE_HP_source_file_correlation:
{
unsigned char *edata = data + len - 1;
printf ("DW_LNE_HP_source_file_correlation\n");
while (data < edata)
{
unsigned int opc;
READ_ULEB (opc, data, edata);
switch (opc)
{
case DW_LNE_HP_SFC_formfeed:
printf (" DW_LNE_HP_SFC_formfeed\n");
break;
case DW_LNE_HP_SFC_set_listing_line:
READ_ULEB (val, data, edata);
printf (" DW_LNE_HP_SFC_set_listing_line (%s)\n",
dwarf_vmatoa ("u", val));
break;
case DW_LNE_HP_SFC_associate:
printf (" DW_LNE_HP_SFC_associate ");
READ_ULEB (val, data, edata);
printf ("(%s", dwarf_vmatoa ("u", val));
READ_ULEB (val, data, edata);
printf (",%s", dwarf_vmatoa ("u", val));
READ_ULEB (val, data, edata);
printf (",%s)\n", dwarf_vmatoa ("u", val));
break;
default:
printf (_(" UNKNOWN DW_LNE_HP_SFC opcode (%u)\n"), opc);
data = edata;
break;
}
}
}
break;
default:
{
unsigned int rlen = len - 1;
if (op_code >= DW_LNE_lo_user
/* The test against DW_LNW_hi_user is redundant due to
the limited range of the unsigned char data type used
for op_code. */
/*&& op_code <= DW_LNE_hi_user*/)
printf (_("user defined: "));
else
printf (_("UNKNOWN: "));
printf (_("length %d ["), rlen);
for (; rlen; rlen--)
printf (" %02x", *data++);
printf ("]\n");
}
break;
}
return len + header_len;
}
static const unsigned char *
fetch_indirect_string (dwarf_vma offset)
{
struct dwarf_section *section = &debug_displays [str].section;
const unsigned char * ret;
if (section->start == NULL)
return (const unsigned char *) _("<no .debug_str section>");
if (offset >= section->size)
{
warn (_("DW_FORM_strp offset too big: 0x%s\n"),
dwarf_vmatoa ("x", offset));
return (const unsigned char *) _("<offset is too big>");
}
ret = section->start + offset;
/* Unfortunately we cannot rely upon the .debug_str section ending with a
NUL byte. Since our caller is expecting to receive a well formed C
string we test for the lack of a terminating byte here. */
if (strnlen ((const char *) ret, section->size - offset)
== section->size - offset)
ret = (const unsigned char *)
_("<no NUL byte at end of .debug_str section>");
return ret;
}
static const unsigned char *
fetch_indirect_line_string (dwarf_vma offset)
{
struct dwarf_section *section = &debug_displays [line_str].section;
const unsigned char * ret;
if (section->start == NULL)
return (const unsigned char *) _("<no .debug_line_str section>");
if (offset >= section->size)
{
warn (_("DW_FORM_line_strp offset too big: 0x%s\n"),
dwarf_vmatoa ("x", offset));
return (const unsigned char *) _("<offset is too big>");
}
ret = section->start + offset;
/* Unfortunately we cannot rely upon the .debug_line_str section ending
with a NUL byte. Since our caller is expecting to receive a well formed
C string we test for the lack of a terminating byte here. */
if (strnlen ((const char *) ret, section->size - offset)
== section->size - offset)
ret = (const unsigned char *)
_("<no NUL byte at end of .debug_line_str section>");
return ret;
}
static const char *
fetch_indexed_string (dwarf_vma idx, struct cu_tu_set *this_set,
dwarf_vma offset_size, bool dwo)
{
enum dwarf_section_display_enum str_sec_idx = dwo ? str_dwo : str;
enum dwarf_section_display_enum idx_sec_idx = dwo ? str_index_dwo : str_index;
struct dwarf_section *index_section = &debug_displays [idx_sec_idx].section;
struct dwarf_section *str_section = &debug_displays [str_sec_idx].section;
dwarf_vma index_offset;
dwarf_vma str_offset;
const char * ret;
unsigned char *curr = index_section->start;
unsigned char *end = curr + index_section->size;
dwarf_vma length;
if (index_section->start == NULL)
return (dwo ? _("<no .debug_str_offsets.dwo section>")
: _("<no .debug_str_offsets section>"));
if (str_section->start == NULL)
return (dwo ? _("<no .debug_str.dwo section>")
: _("<no .debug_str section>"));
/* FIXME: We should cache the length... */
SAFE_BYTE_GET_AND_INC (length, curr, 4, end);
if (length == 0xffffffff)
{
if (offset_size != 8)
warn (_("Expected offset size of 8 but given %s"), dwarf_vmatoa ("x", offset_size));
SAFE_BYTE_GET_AND_INC (length, curr, 8, end);
}
else if (offset_size != 4)
{
warn (_("Expected offset size of 4 but given %s"), dwarf_vmatoa ("x", offset_size));
}
if (length == 0)
{
/* This is probably an old style .debug_str_offset section which
just contains offsets and no header (and the first offset is 0). */
curr = index_section->start;
length = index_section->size;
}
else
{
/* Skip the version and padding bytes.
We assume that they are correct. */
if (end - curr >= 4)
curr += 4;
else
curr = end;
if (length >= 4)
length -= 4;
else
length = 0;
if (this_set != NULL
&& this_set->section_sizes[DW_SECT_STR_OFFSETS] < length)
length = this_set->section_sizes[DW_SECT_STR_OFFSETS];
if (length > (dwarf_vma) (end - curr))
{
warn (_("index table size too large for section %s vs %s\n"),
dwarf_vmatoa ("x", length),
dwarf_vmatoa ("x", index_section->size));
length = end - curr;
}
if (length < offset_size)
{
warn (_("index table size %s is too small\n"),
dwarf_vmatoa ("x", length));
return _("<table too small>");
}
}
index_offset = idx * offset_size;
if (this_set != NULL)
index_offset += this_set->section_offsets [DW_SECT_STR_OFFSETS];
if (index_offset >= length
|| length - index_offset < offset_size)
{
warn (_("DW_FORM_GNU_str_index offset too big: 0x%s vs 0x%s\n"),
dwarf_vmatoa ("x", index_offset),
dwarf_vmatoa ("x", length));
return _("<index offset is too big>");
}
str_offset = byte_get (curr + index_offset, offset_size);
str_offset -= str_section->address;
if (str_offset >= str_section->size)
{
warn (_("DW_FORM_GNU_str_index indirect offset too big: 0x%s\n"),
dwarf_vmatoa ("x", str_offset));
return _("<indirect index offset is too big>");
}
ret = (const char *) str_section->start + str_offset;
/* Unfortunately we cannot rely upon str_section ending with a NUL byte.
Since our caller is expecting to receive a well formed C string we test
for the lack of a terminating byte here. */
if (strnlen (ret, str_section->size - str_offset)
== str_section->size - str_offset)
ret = (const char *) _("<no NUL byte at end of section>");
return ret;
}
static const char *
fetch_indexed_value (dwarf_vma offset, dwarf_vma bytes)
{
struct dwarf_section *section = &debug_displays [debug_addr].section;
if (section->start == NULL)
return (_("<no .debug_addr section>"));
if (offset + bytes > section->size)
{
warn (_("Offset into section %s too big: 0x%s\n"),
section->name, dwarf_vmatoa ("x", offset));
return "<offset too big>";
}
return dwarf_vmatoa ("x", byte_get (section->start + offset, bytes));
}
/* FIXME: There are better and more efficient ways to handle
these structures. For now though, I just want something that
is simple to implement. */
/* Records a single attribute in an abbrev. */
typedef struct abbrev_attr
{
unsigned long attribute;
unsigned long form;
dwarf_signed_vma implicit_const;
struct abbrev_attr * next;
}
abbrev_attr;
/* Records a single abbrev. */
typedef struct abbrev_entry
{
unsigned long number;
unsigned long tag;
int children;
struct abbrev_attr * first_attr;
struct abbrev_attr * last_attr;
struct abbrev_entry * next;
}
abbrev_entry;
/* Records a set of abbreviations. */
typedef struct abbrev_list
{
abbrev_entry * first_abbrev;
abbrev_entry * last_abbrev;
dwarf_vma abbrev_base;
dwarf_vma abbrev_offset;
struct abbrev_list * next;
unsigned char * start_of_next_abbrevs;
}
abbrev_list;
/* Records all the abbrevs found so far. */
static struct abbrev_list * abbrev_lists = NULL;
typedef struct abbrev_map
{
dwarf_vma start;
dwarf_vma end;
abbrev_list * list;
} abbrev_map;
/* Maps between CU offsets and abbrev sets. */
static abbrev_map * cu_abbrev_map = NULL;
static unsigned long num_abbrev_map_entries = 0;
static unsigned long next_free_abbrev_map_entry = 0;
#define INITIAL_NUM_ABBREV_MAP_ENTRIES 8
#define ABBREV_MAP_ENTRIES_INCREMENT 8
static void
record_abbrev_list_for_cu (dwarf_vma start, dwarf_vma end, abbrev_list * list)
{
if (cu_abbrev_map == NULL)
{
num_abbrev_map_entries = INITIAL_NUM_ABBREV_MAP_ENTRIES;
cu_abbrev_map = xmalloc (num_abbrev_map_entries * sizeof (* cu_abbrev_map));
}
else if (next_free_abbrev_map_entry == num_abbrev_map_entries)
{
num_abbrev_map_entries += ABBREV_MAP_ENTRIES_INCREMENT;
cu_abbrev_map = xrealloc (cu_abbrev_map, num_abbrev_map_entries * sizeof (* cu_abbrev_map));
}
cu_abbrev_map[next_free_abbrev_map_entry].start = start;
cu_abbrev_map[next_free_abbrev_map_entry].end = end;
cu_abbrev_map[next_free_abbrev_map_entry].list = list;
next_free_abbrev_map_entry ++;
}
static void
free_all_abbrevs (void)
{
abbrev_list * list;
for (list = abbrev_lists; list != NULL;)
{
abbrev_list * next = list->next;
abbrev_entry * abbrv;
for (abbrv = list->first_abbrev; abbrv != NULL;)
{
abbrev_entry * next_abbrev = abbrv->next;
abbrev_attr * attr;
for (attr = abbrv->first_attr; attr;)
{
abbrev_attr *next_attr = attr->next;
free (attr);
attr = next_attr;
}
free (abbrv);
abbrv = next_abbrev;
}
free (list);
list = next;
}
abbrev_lists = NULL;
}
static abbrev_list *
new_abbrev_list (dwarf_vma abbrev_base, dwarf_vma abbrev_offset)
{
abbrev_list * list = (abbrev_list *) xcalloc (sizeof * list, 1);
list->abbrev_base = abbrev_base;
list->abbrev_offset = abbrev_offset;
list->next = abbrev_lists;
abbrev_lists = list;
return list;
}
static abbrev_list *
find_abbrev_list_by_abbrev_offset (dwarf_vma abbrev_base,
dwarf_vma abbrev_offset)
{
abbrev_list * list;
for (list = abbrev_lists; list != NULL; list = list->next)
if (list->abbrev_base == abbrev_base
&& list->abbrev_offset == abbrev_offset)
return list;
return NULL;
}
/* Find the abbreviation map for the CU that includes OFFSET.
OFFSET is an absolute offset from the start of the .debug_info section. */
/* FIXME: This function is going to slow down readelf & objdump.
Consider using a better algorithm to mitigate this effect. */
static abbrev_map *
find_abbrev_map_by_offset (dwarf_vma offset)
{
unsigned long i;
for (i = 0; i < next_free_abbrev_map_entry; i++)
if (cu_abbrev_map[i].start <= offset
&& cu_abbrev_map[i].end > offset)
return cu_abbrev_map + i;
return NULL;
}
static void
add_abbrev (unsigned long number,
unsigned long tag,
int children,
abbrev_list * list)
{
abbrev_entry * entry;
entry = (abbrev_entry *) xmalloc (sizeof (*entry));
entry->number = number;
entry->tag = tag;
entry->children = children;
entry->first_attr = NULL;
entry->last_attr = NULL;
entry->next = NULL;
assert (list != NULL);
if (list->first_abbrev == NULL)
list->first_abbrev = entry;
else
list->last_abbrev->next = entry;
list->last_abbrev = entry;
}
static void
add_abbrev_attr (unsigned long attribute,
unsigned long form,
dwarf_signed_vma implicit_const,
abbrev_list * list)
{
abbrev_attr *attr;
attr = (abbrev_attr *) xmalloc (sizeof (*attr));
attr->attribute = attribute;
attr->form = form;
attr->implicit_const = implicit_const;
attr->next = NULL;
assert (list != NULL && list->last_abbrev != NULL);
if (list->last_abbrev->first_attr == NULL)
list->last_abbrev->first_attr = attr;
else
list->last_abbrev->last_attr->next = attr;
list->last_abbrev->last_attr = attr;
}
/* Processes the (partial) contents of a .debug_abbrev section.
Returns NULL if the end of the section was encountered.
Returns the address after the last byte read if the end of
an abbreviation set was found. */
static unsigned char *
process_abbrev_set (struct dwarf_section *section,
dwarf_vma abbrev_base,
dwarf_vma abbrev_size,
dwarf_vma abbrev_offset,
abbrev_list *list)
{
if (abbrev_base >= section->size
|| abbrev_size > section->size - abbrev_base)
{
/* PR 17531: file:4bcd9ce9. */
warn (_("Debug info is corrupted, abbrev size (%lx) is larger than "
"abbrev section size (%lx)\n"),
(unsigned long) (abbrev_base + abbrev_size),
(unsigned long) section->size);
return NULL;
}
if (abbrev_offset >= abbrev_size)
{
warn (_("Debug info is corrupted, abbrev offset (%lx) is larger than "
"abbrev section size (%lx)\n"),
(unsigned long) abbrev_offset,
(unsigned long) abbrev_size);
return NULL;
}
unsigned char *start = section->start + abbrev_base;
unsigned char *end = start + abbrev_size;
start += abbrev_offset;
while (start < end)
{
unsigned long entry;
unsigned long tag;
unsigned long attribute;
int children;
READ_ULEB (entry, start, end);
/* A single zero is supposed to end the set according
to the standard. If there's more, then signal that to
the caller. */
if (start == end)
return NULL;
if (entry == 0)
return start;
READ_ULEB (tag, start, end);
if (start == end)
return NULL;
children = *start++;
add_abbrev (entry, tag, children, list);
do
{
unsigned long form;
/* Initialize it due to a false compiler warning. */
dwarf_signed_vma implicit_const = -1;
READ_ULEB (attribute, start, end);
if (start == end)
break;
READ_ULEB (form, start, end);
if (start == end)
break;
if (form == DW_FORM_implicit_const)
{
READ_SLEB (implicit_const, start, end);
if (start == end)
break;
}
add_abbrev_attr (attribute, form, implicit_const, list);
}
while (attribute != 0);
}
/* Report the missing single zero which ends the section. */
error (_(".debug_abbrev section not zero terminated\n"));
return NULL;
}
static const char *
get_TAG_name (unsigned long tag)
{
const char *name = get_DW_TAG_name ((unsigned int) tag);
if (name == NULL)
{
static char buffer[100];
if (tag >= DW_TAG_lo_user && tag <= DW_TAG_hi_user)
snprintf (buffer, sizeof (buffer), _("User TAG value: %#lx"), tag);
else
snprintf (buffer, sizeof (buffer), _("Unknown TAG value: %#lx"), tag);
return buffer;
}
return name;
}
static const char *
get_FORM_name (unsigned long form)
{
const char *name;
if (form == 0)
return "DW_FORM value: 0";
name = get_DW_FORM_name (form);
if (name == NULL)
{
static char buffer[100];
snprintf (buffer, sizeof (buffer), _("Unknown FORM value: %lx"), form);
return buffer;
}
return name;
}
static const char *
get_IDX_name (unsigned long idx)
{
const char *name = get_DW_IDX_name ((unsigned int) idx);
if (name == NULL)
{
static char buffer[100];
snprintf (buffer, sizeof (buffer), _("Unknown IDX value: %lx"), idx);
return buffer;
}
return name;
}
static unsigned char *
display_block (unsigned char *data,
dwarf_vma length,
const unsigned char * const end, char delimiter)
{
dwarf_vma maxlen;
printf (_("%c%s byte block: "), delimiter, dwarf_vmatoa ("u", length));
if (data > end)
return (unsigned char *) end;
maxlen = (dwarf_vma) (end - data);
length = length > maxlen ? maxlen : length;
while (length --)
printf ("%lx ", (unsigned long) byte_get (data++, 1));
return data;
}
static int
decode_location_expression (unsigned char * data,
unsigned int pointer_size,
unsigned int offset_size,
int dwarf_version,
dwarf_vma length,
dwarf_vma cu_offset,
struct dwarf_section * section)
{
unsigned op;
dwarf_vma uvalue;
dwarf_signed_vma svalue;
unsigned char *end = data + length;
int need_frame_base = 0;
while (data < end)
{
op = *data++;
switch (op)
{
case DW_OP_addr:
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
printf ("DW_OP_addr: %s", dwarf_vmatoa ("x", uvalue));
break;
case DW_OP_deref:
printf ("DW_OP_deref");
break;
case DW_OP_const1u:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
printf ("DW_OP_const1u: %lu", (unsigned long) uvalue);
break;
case DW_OP_const1s:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 1, end);
printf ("DW_OP_const1s: %ld", (long) svalue);
break;
case DW_OP_const2u:
SAFE_BYTE_GET_AND_INC (uvalue, data, 2, end);
printf ("DW_OP_const2u: %lu", (unsigned long) uvalue);
break;
case DW_OP_const2s:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 2, end);
printf ("DW_OP_const2s: %ld", (long) svalue);
break;
case DW_OP_const4u:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
printf ("DW_OP_const4u: %lu", (unsigned long) uvalue);
break;
case DW_OP_const4s:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 4, end);
printf ("DW_OP_const4s: %ld", (long) svalue);
break;
case DW_OP_const8u:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
printf ("DW_OP_const8u: %lu ", (unsigned long) uvalue);
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
printf ("%lu", (unsigned long) uvalue);
break;
case DW_OP_const8s:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 4, end);
printf ("DW_OP_const8s: %ld ", (long) svalue);
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 4, end);
printf ("%ld", (long) svalue);
break;
case DW_OP_constu:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_constu: %s", dwarf_vmatoa ("u", uvalue));
break;
case DW_OP_consts:
READ_SLEB (svalue, data, end);
printf ("DW_OP_consts: %s", dwarf_vmatoa ("d", svalue));
break;
case DW_OP_dup:
printf ("DW_OP_dup");
break;
case DW_OP_drop:
printf ("DW_OP_drop");
break;
case DW_OP_over:
printf ("DW_OP_over");
break;
case DW_OP_pick:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
printf ("DW_OP_pick: %ld", (unsigned long) uvalue);
break;
case DW_OP_swap:
printf ("DW_OP_swap");
break;
case DW_OP_rot:
printf ("DW_OP_rot");
break;
case DW_OP_xderef:
printf ("DW_OP_xderef");
break;
case DW_OP_abs:
printf ("DW_OP_abs");
break;
case DW_OP_and:
printf ("DW_OP_and");
break;
case DW_OP_div:
printf ("DW_OP_div");
break;
case DW_OP_minus:
printf ("DW_OP_minus");
break;
case DW_OP_mod:
printf ("DW_OP_mod");
break;
case DW_OP_mul:
printf ("DW_OP_mul");
break;
case DW_OP_neg:
printf ("DW_OP_neg");
break;
case DW_OP_not:
printf ("DW_OP_not");
break;
case DW_OP_or:
printf ("DW_OP_or");
break;
case DW_OP_plus:
printf ("DW_OP_plus");
break;
case DW_OP_plus_uconst:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_plus_uconst: %s", dwarf_vmatoa ("u", uvalue));
break;
case DW_OP_shl:
printf ("DW_OP_shl");
break;
case DW_OP_shr:
printf ("DW_OP_shr");
break;
case DW_OP_shra:
printf ("DW_OP_shra");
break;
case DW_OP_xor:
printf ("DW_OP_xor");
break;
case DW_OP_bra:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 2, end);
printf ("DW_OP_bra: %ld", (long) svalue);
break;
case DW_OP_eq:
printf ("DW_OP_eq");
break;
case DW_OP_ge:
printf ("DW_OP_ge");
break;
case DW_OP_gt:
printf ("DW_OP_gt");
break;
case DW_OP_le:
printf ("DW_OP_le");
break;
case DW_OP_lt:
printf ("DW_OP_lt");
break;
case DW_OP_ne:
printf ("DW_OP_ne");
break;
case DW_OP_skip:
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 2, end);
printf ("DW_OP_skip: %ld", (long) svalue);
break;
case DW_OP_lit0:
case DW_OP_lit1:
case DW_OP_lit2:
case DW_OP_lit3:
case DW_OP_lit4:
case DW_OP_lit5:
case DW_OP_lit6:
case DW_OP_lit7:
case DW_OP_lit8:
case DW_OP_lit9:
case DW_OP_lit10:
case DW_OP_lit11:
case DW_OP_lit12:
case DW_OP_lit13:
case DW_OP_lit14:
case DW_OP_lit15:
case DW_OP_lit16:
case DW_OP_lit17:
case DW_OP_lit18:
case DW_OP_lit19:
case DW_OP_lit20:
case DW_OP_lit21:
case DW_OP_lit22:
case DW_OP_lit23:
case DW_OP_lit24:
case DW_OP_lit25:
case DW_OP_lit26:
case DW_OP_lit27:
case DW_OP_lit28:
case DW_OP_lit29:
case DW_OP_lit30:
case DW_OP_lit31:
printf ("DW_OP_lit%d", op - DW_OP_lit0);
break;
case DW_OP_reg0:
case DW_OP_reg1:
case DW_OP_reg2:
case DW_OP_reg3:
case DW_OP_reg4:
case DW_OP_reg5:
case DW_OP_reg6:
case DW_OP_reg7:
case DW_OP_reg8:
case DW_OP_reg9:
case DW_OP_reg10:
case DW_OP_reg11:
case DW_OP_reg12:
case DW_OP_reg13:
case DW_OP_reg14:
case DW_OP_reg15:
case DW_OP_reg16:
case DW_OP_reg17:
case DW_OP_reg18:
case DW_OP_reg19:
case DW_OP_reg20:
case DW_OP_reg21:
case DW_OP_reg22:
case DW_OP_reg23:
case DW_OP_reg24:
case DW_OP_reg25:
case DW_OP_reg26:
case DW_OP_reg27:
case DW_OP_reg28:
case DW_OP_reg29:
case DW_OP_reg30:
case DW_OP_reg31:
printf ("DW_OP_reg%d (%s)", op - DW_OP_reg0,
regname (op - DW_OP_reg0, 1));
break;
case DW_OP_breg0:
case DW_OP_breg1:
case DW_OP_breg2:
case DW_OP_breg3:
case DW_OP_breg4:
case DW_OP_breg5:
case DW_OP_breg6:
case DW_OP_breg7:
case DW_OP_breg8:
case DW_OP_breg9:
case DW_OP_breg10:
case DW_OP_breg11:
case DW_OP_breg12:
case DW_OP_breg13:
case DW_OP_breg14:
case DW_OP_breg15:
case DW_OP_breg16:
case DW_OP_breg17:
case DW_OP_breg18:
case DW_OP_breg19:
case DW_OP_breg20:
case DW_OP_breg21:
case DW_OP_breg22:
case DW_OP_breg23:
case DW_OP_breg24:
case DW_OP_breg25:
case DW_OP_breg26:
case DW_OP_breg27:
case DW_OP_breg28:
case DW_OP_breg29:
case DW_OP_breg30:
case DW_OP_breg31:
READ_SLEB (svalue, data, end);
printf ("DW_OP_breg%d (%s): %s", op - DW_OP_breg0,
regname (op - DW_OP_breg0, 1), dwarf_vmatoa ("d", svalue));
break;
case DW_OP_regx:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_regx: %s (%s)",
dwarf_vmatoa ("u", uvalue), regname (uvalue, 1));
break;
case DW_OP_fbreg:
need_frame_base = 1;
READ_SLEB (svalue, data, end);
printf ("DW_OP_fbreg: %s", dwarf_vmatoa ("d", svalue));
break;
case DW_OP_bregx:
READ_ULEB (uvalue, data, end);
READ_SLEB (svalue, data, end);
printf ("DW_OP_bregx: %s (%s) %s",
dwarf_vmatoa ("u", uvalue), regname (uvalue, 1),
dwarf_vmatoa ("d", svalue));
break;
case DW_OP_piece:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_piece: %s", dwarf_vmatoa ("u", uvalue));
break;
case DW_OP_deref_size:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
printf ("DW_OP_deref_size: %ld", (long) uvalue);
break;
case DW_OP_xderef_size:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
printf ("DW_OP_xderef_size: %ld", (long) uvalue);
break;
case DW_OP_nop:
printf ("DW_OP_nop");
break;
/* DWARF 3 extensions. */
case DW_OP_push_object_address:
printf ("DW_OP_push_object_address");
break;
case DW_OP_call2:
/* FIXME: Strictly speaking for 64-bit DWARF3 files
this ought to be an 8-byte wide computation. */
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 2, end);
printf ("DW_OP_call2: <0x%s>",
dwarf_vmatoa ("x", svalue + cu_offset));
break;
case DW_OP_call4:
/* FIXME: Strictly speaking for 64-bit DWARF3 files
this ought to be an 8-byte wide computation. */
SAFE_SIGNED_BYTE_GET_AND_INC (svalue, data, 4, end);
printf ("DW_OP_call4: <0x%s>",
dwarf_vmatoa ("x", svalue + cu_offset));
break;
case DW_OP_call_ref:
/* FIXME: Strictly speaking for 64-bit DWARF3 files
this ought to be an 8-byte wide computation. */
if (dwarf_version == -1)
{
printf (_("(DW_OP_call_ref in frame info)"));
/* No way to tell where the next op is, so just bail. */
return need_frame_base;
}
if (dwarf_version == 2)
{
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
}
else
{
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
}
printf ("DW_OP_call_ref: <0x%s>", dwarf_vmatoa ("x", uvalue));
break;
case DW_OP_form_tls_address:
printf ("DW_OP_form_tls_address");
break;
case DW_OP_call_frame_cfa:
printf ("DW_OP_call_frame_cfa");
break;
case DW_OP_bit_piece:
printf ("DW_OP_bit_piece: ");
READ_ULEB (uvalue, data, end);
printf (_("size: %s "), dwarf_vmatoa ("u", uvalue));
READ_ULEB (uvalue, data, end);
printf (_("offset: %s "), dwarf_vmatoa ("u", uvalue));
break;
/* DWARF 4 extensions. */
case DW_OP_stack_value:
printf ("DW_OP_stack_value");
break;
case DW_OP_implicit_value:
printf ("DW_OP_implicit_value");
READ_ULEB (uvalue, data, end);
data = display_block (data, uvalue, end, ' ');
break;
/* GNU extensions. */
case DW_OP_GNU_push_tls_address:
printf (_("DW_OP_GNU_push_tls_address or DW_OP_HP_unknown"));
break;
case DW_OP_GNU_uninit:
printf ("DW_OP_GNU_uninit");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_GNU_encoded_addr:
{
int encoding = 0;
dwarf_vma addr;
if (data < end)
encoding = *data++;
addr = get_encoded_value (&data, encoding, section, end);
printf ("DW_OP_GNU_encoded_addr: fmt:%02x addr:", encoding);
print_dwarf_vma (addr, pointer_size);
}
break;
case DW_OP_implicit_pointer:
case DW_OP_GNU_implicit_pointer:
/* FIXME: Strictly speaking for 64-bit DWARF3 files
this ought to be an 8-byte wide computation. */
if (dwarf_version == -1)
{
printf (_("(%s in frame info)"),
(op == DW_OP_implicit_pointer
? "DW_OP_implicit_pointer"
: "DW_OP_GNU_implicit_pointer"));
/* No way to tell where the next op is, so just bail. */
return need_frame_base;
}
if (dwarf_version == 2)
{
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
}
else
{
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
}
READ_SLEB (svalue, data, end);
printf ("%s: <0x%s> %s",
(op == DW_OP_implicit_pointer
? "DW_OP_implicit_pointer" : "DW_OP_GNU_implicit_pointer"),
dwarf_vmatoa ("x", uvalue),
dwarf_vmatoa ("d", svalue));
break;
case DW_OP_entry_value:
case DW_OP_GNU_entry_value:
READ_ULEB (uvalue, data, end);
/* PR 17531: file: 0cc9cd00. */
if (uvalue > (dwarf_vma) (end - data))
uvalue = end - data;
printf ("%s: (", (op == DW_OP_entry_value ? "DW_OP_entry_value"
: "DW_OP_GNU_entry_value"));
if (decode_location_expression (data, pointer_size, offset_size,
dwarf_version, uvalue,
cu_offset, section))
need_frame_base = 1;
putchar (')');
data += uvalue;
break;
case DW_OP_const_type:
case DW_OP_GNU_const_type:
READ_ULEB (uvalue, data, end);
printf ("%s: <0x%s> ",
(op == DW_OP_const_type ? "DW_OP_const_type"
: "DW_OP_GNU_const_type"),
dwarf_vmatoa ("x", cu_offset + uvalue));
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
data = display_block (data, uvalue, end, ' ');
break;
case DW_OP_regval_type:
case DW_OP_GNU_regval_type:
READ_ULEB (uvalue, data, end);
printf ("%s: %s (%s)",
(op == DW_OP_regval_type ? "DW_OP_regval_type"
: "DW_OP_GNU_regval_type"),
dwarf_vmatoa ("u", uvalue), regname (uvalue, 1));
READ_ULEB (uvalue, data, end);
printf (" <0x%s>", dwarf_vmatoa ("x", cu_offset + uvalue));
break;
case DW_OP_deref_type:
case DW_OP_GNU_deref_type:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
printf ("%s: %ld",
(op == DW_OP_deref_type ? "DW_OP_deref_type"
: "DW_OP_GNU_deref_type"),
(long) uvalue);
READ_ULEB (uvalue, data, end);
printf (" <0x%s>", dwarf_vmatoa ("x", cu_offset + uvalue));
break;
case DW_OP_convert:
case DW_OP_GNU_convert:
READ_ULEB (uvalue, data, end);
printf ("%s <0x%s>",
(op == DW_OP_convert ? "DW_OP_convert" : "DW_OP_GNU_convert"),
dwarf_vmatoa ("x", uvalue ? cu_offset + uvalue : 0));
break;
case DW_OP_reinterpret:
case DW_OP_GNU_reinterpret:
READ_ULEB (uvalue, data, end);
printf ("%s <0x%s>",
(op == DW_OP_reinterpret ? "DW_OP_reinterpret"
: "DW_OP_GNU_reinterpret"),
dwarf_vmatoa ("x", uvalue ? cu_offset + uvalue : 0));
break;
case DW_OP_GNU_parameter_ref:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
printf ("DW_OP_GNU_parameter_ref: <0x%s>",
dwarf_vmatoa ("x", cu_offset + uvalue));
break;
case DW_OP_GNU_addr_index:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_GNU_addr_index <0x%s>", dwarf_vmatoa ("x", uvalue));
break;
case DW_OP_GNU_const_index:
READ_ULEB (uvalue, data, end);
printf ("DW_OP_GNU_const_index <0x%s>", dwarf_vmatoa ("x", uvalue));
break;
case DW_OP_GNU_variable_value:
/* FIXME: Strictly speaking for 64-bit DWARF3 files
this ought to be an 8-byte wide computation. */
if (dwarf_version == -1)
{
printf (_("(DW_OP_GNU_variable_value in frame info)"));
/* No way to tell where the next op is, so just bail. */
return need_frame_base;
}
if (dwarf_version == 2)
{
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
}
else
{
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
}
printf ("DW_OP_GNU_variable_value: <0x%s>", dwarf_vmatoa ("x", uvalue));
break;
/* HP extensions. */
case DW_OP_HP_is_value:
printf ("DW_OP_HP_is_value");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_HP_fltconst4:
printf ("DW_OP_HP_fltconst4");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_HP_fltconst8:
printf ("DW_OP_HP_fltconst8");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_HP_mod_range:
printf ("DW_OP_HP_mod_range");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_HP_unmod_range:
printf ("DW_OP_HP_unmod_range");
/* FIXME: Is there data associated with this OP ? */
break;
case DW_OP_HP_tls:
printf ("DW_OP_HP_tls");
/* FIXME: Is there data associated with this OP ? */
break;
/* PGI (STMicroelectronics) extensions. */
case DW_OP_PGI_omp_thread_num:
/* Pushes the thread number for the current thread as it would be
returned by the standard OpenMP library function:
omp_get_thread_num(). The "current thread" is the thread for
which the expression is being evaluated. */
printf ("DW_OP_PGI_omp_thread_num");
break;
default:
if (op >= DW_OP_lo_user
&& op <= DW_OP_hi_user)
printf (_("(User defined location op 0x%x)"), op);
else
printf (_("(Unknown location op 0x%x)"), op);
/* No way to tell where the next op is, so just bail. */
return need_frame_base;
}
/* Separate the ops. */
if (data < end)
printf ("; ");
}
return need_frame_base;
}
/* Find the CU or TU set corresponding to the given CU_OFFSET.
This is used for DWARF package files. */
static struct cu_tu_set *
find_cu_tu_set_v2 (dwarf_vma cu_offset, int do_types)
{
struct cu_tu_set *p;
unsigned int nsets;
unsigned int dw_sect;
if (do_types)
{
p = tu_sets;
nsets = tu_count;
dw_sect = DW_SECT_TYPES;
}
else
{
p = cu_sets;
nsets = cu_count;
dw_sect = DW_SECT_INFO;
}
while (nsets > 0)
{
if (p->section_offsets [dw_sect] == cu_offset)
return p;
p++;
nsets--;
}
return NULL;
}
static const char *
fetch_alt_indirect_string (dwarf_vma offset)
{
separate_info * i;
if (! do_follow_links)
return "";
if (first_separate_info == NULL)
return _("<no links available>");
for (i = first_separate_info; i != NULL; i = i->next)
{
struct dwarf_section * section;
const char * ret;
if (! load_debug_section (separate_debug_str, i->handle))
continue;
section = &debug_displays [separate_debug_str].section;
if (section->start == NULL)
continue;
if (offset >= section->size)
continue;
ret = (const char *) (section->start + offset);
/* Unfortunately we cannot rely upon the .debug_str section ending with a
NUL byte. Since our caller is expecting to receive a well formed C
string we test for the lack of a terminating byte here. */
if (strnlen ((const char *) ret, section->size - offset)
== section->size - offset)
return _("<no NUL byte at end of alt .debug_str section>");
return ret;
}
warn (_("DW_FORM_GNU_strp_alt offset (%s) too big or no string sections available\n"),
dwarf_vmatoa ("x", offset));
return _("<offset is too big>");
}
static const char *
get_AT_name (unsigned long attribute)
{
const char *name;
if (attribute == 0)
return "DW_AT value: 0";
/* One value is shared by the MIPS and HP extensions: */
if (attribute == DW_AT_MIPS_fde)
return "DW_AT_MIPS_fde or DW_AT_HP_unmodifiable";
name = get_DW_AT_name (attribute);
if (name == NULL)
{
static char buffer[100];
snprintf (buffer, sizeof (buffer), _("Unknown AT value: %lx"),
attribute);
return buffer;
}
return name;
}
static void
add_dwo_info (const char * value, dwarf_vma cu_offset, dwo_type type)
{
dwo_info * dwinfo = xmalloc (sizeof * dwinfo);
dwinfo->type = type;
dwinfo->value = value;
dwinfo->cu_offset = cu_offset;
dwinfo->next = first_dwo_info;
first_dwo_info = dwinfo;
}
static void
add_dwo_name (const char * name, dwarf_vma cu_offset)
{
add_dwo_info (name, cu_offset, DWO_NAME);
}
static void
add_dwo_dir (const char * dir, dwarf_vma cu_offset)
{
add_dwo_info (dir, cu_offset, DWO_DIR);
}
static void
add_dwo_id (const char * id, dwarf_vma cu_offset)
{
add_dwo_info (id, cu_offset, DWO_ID);
}
static void
free_dwo_info (void)
{
dwo_info * dwinfo;
dwo_info * next;
for (dwinfo = first_dwo_info; dwinfo != NULL; dwinfo = next)
{
next = dwinfo->next;
free (dwinfo);
}
first_dwo_info = NULL;
}
/* Ensure that START + UVALUE is less than END.
Return an adjusted UVALUE if necessary to ensure this relationship. */
static inline dwarf_vma
check_uvalue (const unsigned char * start,
dwarf_vma uvalue,
const unsigned char * end)
{
dwarf_vma max_uvalue = end - start;
/* See PR 17512: file: 008-103549-0.001:0.1.
and PR 24829 for examples of where these tests are triggered. */
if (uvalue > max_uvalue)
{
warn (_("Corrupt attribute block length: %lx\n"), (long) uvalue);
uvalue = max_uvalue;
}
return uvalue;
}
static unsigned char *
skip_attr_bytes (unsigned long form,
unsigned char *data,
unsigned char *end,
dwarf_vma pointer_size,
dwarf_vma offset_size,
int dwarf_version,
dwarf_vma *value_return)
{
dwarf_signed_vma svalue;
dwarf_vma uvalue = 0;
dwarf_vma inc = 0;
* value_return = 0;
switch (form)
{
case DW_FORM_ref_addr:
if (dwarf_version == 2)
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
else if (dwarf_version > 2)
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
else
return NULL;
break;
case DW_FORM_addr:
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
break;
case DW_FORM_strp:
case DW_FORM_line_strp:
case DW_FORM_sec_offset:
case DW_FORM_GNU_ref_alt:
case DW_FORM_GNU_strp_alt:
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
break;
case DW_FORM_flag_present:
uvalue = 1;
break;
case DW_FORM_ref1:
case DW_FORM_flag:
case DW_FORM_data1:
case DW_FORM_strx1:
case DW_FORM_addrx1:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
break;
case DW_FORM_strx3:
case DW_FORM_addrx3:
SAFE_BYTE_GET_AND_INC (uvalue, data, 3, end);
break;
case DW_FORM_ref2:
case DW_FORM_data2:
case DW_FORM_strx2:
case DW_FORM_addrx2:
SAFE_BYTE_GET_AND_INC (uvalue, data, 2, end);
break;
case DW_FORM_ref4:
case DW_FORM_data4:
case DW_FORM_strx4:
case DW_FORM_addrx4:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
break;
case DW_FORM_sdata:
READ_SLEB (svalue, data, end);
uvalue = svalue;
break;
case DW_FORM_ref_udata:
case DW_FORM_udata:
case DW_FORM_GNU_str_index:
case DW_FORM_strx:
case DW_FORM_GNU_addr_index:
case DW_FORM_addrx:
READ_ULEB (uvalue, data, end);
break;
case DW_FORM_ref8:
SAFE_BYTE_GET_AND_INC (uvalue, data, 8, end);
break;
case DW_FORM_data8:
case DW_FORM_ref_sig8:
inc = 8;
break;
case DW_FORM_data16:
inc = 16;
break;
case DW_FORM_string:
inc = strnlen ((char *) data, end - data) + 1;
break;
case DW_FORM_block:
case DW_FORM_exprloc:
READ_ULEB (uvalue, data, end);
inc = uvalue;
break;
case DW_FORM_block1:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
inc = uvalue;
break;
case DW_FORM_block2:
SAFE_BYTE_GET_AND_INC (uvalue, data, 2, end);
inc = uvalue;
break;
case DW_FORM_block4:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
inc = uvalue;
break;
case DW_FORM_indirect:
READ_ULEB (form, data, end);
if (form == DW_FORM_implicit_const)
SKIP_ULEB (data, end);
return skip_attr_bytes (form, data, end, pointer_size, offset_size,
dwarf_version, value_return);
default:
return NULL;
}
* value_return = uvalue;
if (inc <= (dwarf_vma) (end - data))
data += inc;
else
data = end;
return data;
}
/* Given form FORM with value UVALUE, locate and return the abbreviation
associated with it. */
static abbrev_entry *
get_type_abbrev_from_form (unsigned long form,
unsigned long uvalue,
dwarf_vma cu_offset,
const struct dwarf_section *section,
unsigned long *abbrev_num_return,
unsigned char **data_return,
abbrev_map **map_return)
{
unsigned long abbrev_number;
abbrev_map * map;
abbrev_entry * entry;
unsigned char * data;
if (abbrev_num_return != NULL)
* abbrev_num_return = 0;
if (data_return != NULL)
* data_return = NULL;
switch (form)
{
case DW_FORM_GNU_ref_alt:
case DW_FORM_ref_sig8:
/* FIXME: We are unable to handle this form at the moment. */
return NULL;
case DW_FORM_ref_addr:
if (uvalue >= section->size)
{
warn (_("Unable to resolve ref_addr form: uvalue %lx > section size %lx (%s)\n"),
uvalue, (long) section->size, section->name);
return NULL;
}
break;
case DW_FORM_ref_sup4:
case DW_FORM_ref_sup8:
break;
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
if (uvalue + cu_offset > section->size)
{
warn (_("Unable to resolve ref form: uvalue %lx + cu_offset %lx > section size %lx\n"),
uvalue, (long) cu_offset, (long) section->size);
return NULL;
}
uvalue += cu_offset;
break;
/* FIXME: Are there other DW_FORMs that can be used by types ? */
default:
warn (_("Unexpected form %lx encountered whilst finding abbreviation for type\n"), form);
return NULL;
}
data = (unsigned char *) section->start + uvalue;
map = find_abbrev_map_by_offset (uvalue);
if (map == NULL)
{
warn (_("Unable to find abbreviations for CU offset %#lx\n"), uvalue);
return NULL;
}
if (map->list == NULL)
{
warn (_("Empty abbreviation list encountered for CU offset %lx\n"), uvalue);
return NULL;
}
if (map_return != NULL)
{
if (form == DW_FORM_ref_addr)
*map_return = map;
else
*map_return = NULL;
}
READ_ULEB (abbrev_number, data, section->start + section->size);
for (entry = map->list->first_abbrev; entry != NULL; entry = entry->next)
if (entry->number == abbrev_number)
break;
if (abbrev_num_return != NULL)
* abbrev_num_return = abbrev_number;
if (data_return != NULL)
* data_return = data;
if (entry == NULL)
warn (_("Unable to find entry for abbreviation %lu\n"), abbrev_number);
return entry;
}
/* Return IS_SIGNED set to TRUE if the type using abbreviation ENTRY
can be determined to be a signed type. The data for ENTRY can be
found starting at DATA. */
static void
get_type_signedness (abbrev_entry *entry,
const struct dwarf_section *section,
unsigned char *data,
unsigned char *end,
dwarf_vma cu_offset,
dwarf_vma pointer_size,
dwarf_vma offset_size,
int dwarf_version,
bool *is_signed,
unsigned int nesting)
{
abbrev_attr * attr;
* is_signed = false;
#define MAX_NESTING 20
if (nesting > MAX_NESTING)
{
/* FIXME: Warn - or is this expected ?
NB/ We need to avoid infinite recursion. */
return;
}
for (attr = entry->first_attr;
attr != NULL && attr->attribute;
attr = attr->next)
{
unsigned char * orig_data = data;
dwarf_vma uvalue = 0;
data = skip_attr_bytes (attr->form, data, end, pointer_size,
offset_size, dwarf_version, & uvalue);
if (data == NULL)
return;
switch (attr->attribute)
{
case DW_AT_linkage_name:
case DW_AT_name:
if (do_wide)
{
if (attr->form == DW_FORM_strp)
printf (", %s", fetch_indirect_string (uvalue));
else if (attr->form == DW_FORM_string)
printf (", %.*s", (int) (end - orig_data), orig_data);
}
break;
case DW_AT_type:
/* Recurse. */
{
abbrev_entry *type_abbrev;
unsigned char *type_data;
abbrev_map *map;
type_abbrev = get_type_abbrev_from_form (attr->form,
uvalue,
cu_offset,
section,
NULL /* abbrev num return */,
&type_data,
&map);
if (type_abbrev == NULL)
break;
get_type_signedness (type_abbrev, section, type_data,
map ? section->start + map->end : end,
map ? map->start : cu_offset,
pointer_size, offset_size, dwarf_version,
is_signed, nesting + 1);
}
break;
case DW_AT_encoding:
/* Determine signness. */
switch (uvalue)
{
case DW_ATE_address:
/* FIXME - some architectures have signed addresses. */
case DW_ATE_boolean:
case DW_ATE_unsigned:
case DW_ATE_unsigned_char:
case DW_ATE_unsigned_fixed:
* is_signed = false;
break;
default:
case DW_ATE_complex_float:
case DW_ATE_float:
case DW_ATE_signed:
case DW_ATE_signed_char:
case DW_ATE_imaginary_float:
case DW_ATE_decimal_float:
case DW_ATE_signed_fixed:
* is_signed = true;
break;
}
break;
}
}
}
static void
read_and_print_leb128 (unsigned char *data,
unsigned int *bytes_read,
unsigned const char *end,
bool is_signed)
{
int status;
dwarf_vma val = read_leb128 (data, end, is_signed, bytes_read, &status);
if (status != 0)
report_leb_status (status, __FILE__, __LINE__);
else
printf ("%s", dwarf_vmatoa (is_signed ? "d" : "u", val));
}
static void
display_discr_list (unsigned long form,
dwarf_vma uvalue,
unsigned char * data,
unsigned const char * end,
int level)
{
if (uvalue == 0)
{
printf ("[default]");
return;
}
switch (form)
{
case DW_FORM_block:
case DW_FORM_block1:
case DW_FORM_block2:
case DW_FORM_block4:
/* Move data pointer back to the start of the byte array. */
data -= uvalue;
break;
default:
printf ("<corrupt>\n");
warn (_("corrupt discr_list - not using a block form\n"));
return;
}
if (uvalue < 2)
{
printf ("<corrupt>\n");
warn (_("corrupt discr_list - block not long enough\n"));
return;
}
bool is_signed =
(level > 0 && level <= MAX_CU_NESTING)
? level_type_signed [level - 1] : false;
printf ("(");
while (uvalue)
{
unsigned char discriminant;
unsigned int bytes_read;
SAFE_BYTE_GET_AND_INC (discriminant, data, 1, end);
-- uvalue;
assert (uvalue > 0);
switch (discriminant)
{
case DW_DSC_label:
printf ("label ");
read_and_print_leb128 (data, & bytes_read, end, is_signed);
assert (bytes_read <= uvalue && bytes_read > 0);
uvalue -= bytes_read;
data += bytes_read;
break;
case DW_DSC_range:
printf ("range ");
read_and_print_leb128 (data, & bytes_read, end, is_signed);
assert (bytes_read <= uvalue && bytes_read > 0);
uvalue -= bytes_read;
data += bytes_read;
printf ("..");
read_and_print_leb128 (data, & bytes_read, end, is_signed);
assert (bytes_read <= uvalue && bytes_read > 0);
uvalue -= bytes_read;
data += bytes_read;
break;
default:
printf ("<corrupt>\n");
warn (_("corrupt discr_list - unrecognized discriminant byte %#x\n"),
discriminant);
return;
}
if (uvalue)
printf (", ");
}
if (is_signed)
printf (")(signed)");
else
printf (")(unsigned)");
}
static unsigned char *
read_and_display_attr_value (unsigned long attribute,
unsigned long form,
dwarf_signed_vma implicit_const,
unsigned char * start,
unsigned char * data,
unsigned char * end,
dwarf_vma cu_offset,
dwarf_vma pointer_size,
dwarf_vma offset_size,
int dwarf_version,
debug_info * debug_info_p,
int do_loc,
struct dwarf_section * section,
struct cu_tu_set * this_set,
char delimiter,
int level)
{
dwarf_signed_vma svalue;
dwarf_vma uvalue = 0;
dwarf_vma uvalue_hi = 0;
unsigned char *block_start = NULL;
unsigned char *orig_data = data;
if (data > end || (data == end && form != DW_FORM_flag_present))
{
warn (_("Corrupt attribute\n"));
return data;
}
if (do_wide && ! do_loc)
{
/* PR 26847: Display the name of the form. */
const char * name = get_FORM_name (form);
/* For convenience we skip the DW_FORM_ prefix to the name. */
if (name[0] == 'D')
name += 8; /* strlen ("DW_FORM_") */
printf ("%c(%s)", delimiter, name);
}
switch (form)
{
default:
break;
case DW_FORM_ref_addr:
if (dwarf_version == 2)
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
else if (dwarf_version > 2)
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
else
error (_("Internal error: DW_FORM_ref_addr is not supported in DWARF version 1.\n"));
break;
case DW_FORM_addr:
SAFE_BYTE_GET_AND_INC (uvalue, data, pointer_size, end);
break;
case DW_FORM_strp_sup:
case DW_FORM_strp:
case DW_FORM_line_strp:
case DW_FORM_sec_offset:
case DW_FORM_GNU_ref_alt:
case DW_FORM_GNU_strp_alt:
SAFE_BYTE_GET_AND_INC (uvalue, data, offset_size, end);
break;
case DW_FORM_flag_present:
uvalue = 1;
break;
case DW_FORM_ref1:
case DW_FORM_flag:
case DW_FORM_data1:
case DW_FORM_strx1:
case DW_FORM_addrx1:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
break;
case DW_FORM_ref2:
case DW_FORM_data2:
case DW_FORM_strx2:
case DW_FORM_addrx2:
SAFE_BYTE_GET_AND_INC (uvalue, data, 2, end);
break;
case DW_FORM_strx3:
case DW_FORM_addrx3:
SAFE_BYTE_GET_AND_INC (uvalue, data, 3, end);
break;
case DW_FORM_ref_sup4:
case DW_FORM_ref4:
case DW_FORM_data4:
case DW_FORM_strx4:
case DW_FORM_addrx4:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
break;
case DW_FORM_ref_sup8:
case DW_FORM_ref8:
case DW_FORM_data8:
case DW_FORM_ref_sig8:
SAFE_BYTE_GET_AND_INC (uvalue, data, 8, end);
break;
case DW_FORM_data16:
SAFE_BYTE_GET_AND_INC (uvalue, data, 8, end);
SAFE_BYTE_GET_AND_INC (uvalue_hi, data, 8, end);
if (byte_get != byte_get_little_endian)
{
dwarf_vma utmp = uvalue;
uvalue = uvalue_hi;
uvalue_hi = utmp;
}
break;
case DW_FORM_sdata:
READ_SLEB (svalue, data, end);
uvalue = svalue;
break;
case DW_FORM_GNU_str_index:
case DW_FORM_strx:
case DW_FORM_ref_udata:
case DW_FORM_udata:
case DW_FORM_GNU_addr_index:
case DW_FORM_addrx:
READ_ULEB (uvalue, data, end);
break;
case DW_FORM_indirect:
READ_ULEB (form, data, end);
if (!do_loc)
printf ("%c%s", delimiter, get_FORM_name (form));
if (form == DW_FORM_implicit_const)
READ_SLEB (implicit_const, data, end);
return read_and_display_attr_value (attribute, form, implicit_const,
start, data, end,
cu_offset, pointer_size,
offset_size, dwarf_version,
debug_info_p, do_loc,
section, this_set, delimiter, level);
case DW_FORM_implicit_const:
uvalue = implicit_const;
break;
}
switch (form)
{
case DW_FORM_ref_addr:
if (!do_loc)
printf ("%c<0x%s>", delimiter, dwarf_vmatoa ("x", uvalue));
break;
case DW_FORM_GNU_ref_alt:
if (!do_loc)
{
if (do_wide)
/* We have already printed the form name. */
printf ("%c<0x%s>", delimiter, dwarf_vmatoa ("x", uvalue));
else
printf ("%c<alt 0x%s>", delimiter, dwarf_vmatoa ("x", uvalue));
}
/* FIXME: Follow the reference... */
break;
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref_sup4:
case DW_FORM_ref_udata:
if (!do_loc)
printf ("%c<0x%s>", delimiter, dwarf_vmatoa ("x", uvalue + cu_offset));
break;
case DW_FORM_data4:
case DW_FORM_addr:
case DW_FORM_sec_offset:
if (!do_loc)
printf ("%c0x%s", delimiter, dwarf_vmatoa ("x", uvalue));
break;
case DW_FORM_flag_present:
case DW_FORM_flag:
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_sdata:
case DW_FORM_udata:
if (!do_loc)
printf ("%c%s", delimiter, dwarf_vmatoa ("d", uvalue));
break;
case DW_FORM_implicit_const:
if (!do_loc)
printf ("%c%s", delimiter, dwarf_vmatoa ("d", implicit_const));
break;
case DW_FORM_ref_sup8:
case DW_FORM_ref8:
case DW_FORM_data8:
if (!do_loc)
{
dwarf_vma utmp = uvalue;
if (form == DW_FORM_ref8)
utmp += cu_offset;
printf ("%c0x%s", delimiter, dwarf_vmatoa ("x", utmp));
}
break;
case DW_FORM_data16:
if (!do_loc)
printf (" 0x%s%s",
uvalue_hi == 0 ? "" : dwarf_vmatoa ("x", uvalue_hi),
dwarf_vmatoa_1 ("x", uvalue, uvalue_hi == 0 ? 0 : 8));
break;
case DW_FORM_string:
if (!do_loc)
printf ("%c%.*s", delimiter, (int) (end - data), data);
data += strnlen ((char *) data, end - data);
if (data < end)
data++;
break;
case DW_FORM_block:
case DW_FORM_exprloc:
READ_ULEB (uvalue, data, end);
do_block:
block_start = data;
if (block_start >= end)
{
warn (_("Block ends prematurely\n"));
uvalue = 0;
block_start = end;
}
uvalue = check_uvalue (block_start, uvalue, end);
if (do_loc)
data = block_start + uvalue;
else
data = display_block (block_start, uvalue, end, delimiter);
break;
case DW_FORM_block1:
SAFE_BYTE_GET_AND_INC (uvalue, data, 1, end);
goto do_block;
case DW_FORM_block2:
SAFE_BYTE_GET_AND_INC (uvalue, data, 2, end);
goto do_block;
case DW_FORM_block4:
SAFE_BYTE_GET_AND_INC (uvalue, data, 4, end);
goto do_block;
case DW_FORM_strp:
if (!do_loc)
{
if (do_wide)
/* We have already displayed the form name. */
printf (_("%c(offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indirect_string (uvalue));
else
printf (_("%c(indirect string, offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indirect_string (uvalue));
}
break;
case DW_FORM_line_strp:
if (!do_loc)
{
if (do_wide)
/* We have already displayed the form name. */
printf (_("%c(offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indirect_line_string (uvalue));
else
printf (_("%c(indirect line string, offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indirect_line_string (uvalue));
}
break;
case DW_FORM_GNU_str_index:
case DW_FORM_strx:
case DW_FORM_strx1:
case DW_FORM_strx2:
case DW_FORM_strx3:
case DW_FORM_strx4:
if (!do_loc)
{
const char *suffix = strrchr (section->name, '.');
bool dwo = suffix && strcmp (suffix, ".dwo") == 0;
if (do_wide)
/* We have already displayed the form name. */
printf (_("%c(offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_string (uvalue, this_set, offset_size, dwo));
else
printf (_("%c(indexed string: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_string (uvalue, this_set, offset_size, dwo));
}
break;
case DW_FORM_GNU_strp_alt:
if (!do_loc)
{
if (do_wide)
/* We have already displayed the form name. */
printf (_("%c(offset: 0x%s) %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_alt_indirect_string (uvalue));
else
printf (_("%c(alt indirect string, offset: 0x%s) %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_alt_indirect_string (uvalue));
}
break;
case DW_FORM_indirect:
/* Handled above. */
break;
case DW_FORM_ref_sig8:
if (!do_loc)
printf ("%c%s: 0x%s", delimiter, do_wide ? "" : "signature",
dwarf_vmatoa ("x", uvalue));
break;
case DW_FORM_GNU_addr_index:
case DW_FORM_addrx:
case DW_FORM_addrx1:
case DW_FORM_addrx2:
case DW_FORM_addrx3:
case DW_FORM_addrx4:
if (!do_loc)
{
dwarf_vma base;
dwarf_vma offset;
if (debug_info_p == NULL)
base = 0;
else if (debug_info_p->addr_base == DEBUG_INFO_UNAVAILABLE)
base = 0;
else
base = debug_info_p->addr_base;
offset = base + uvalue * pointer_size;
if (do_wide)
/* We have already displayed the form name. */
printf (_("%c(index: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_value (offset, pointer_size));
else
printf (_("%c(addr_index: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_value (offset, pointer_size));
}
break;
case DW_FORM_strp_sup:
if (!do_loc)
printf ("%c<0x%s>", delimiter, dwarf_vmatoa ("x", uvalue + cu_offset));
break;
default:
warn (_("Unrecognized form: 0x%lx\n"), form);
break;
}
if ((do_loc || do_debug_loc || do_debug_ranges)
&& num_debug_info_entries == 0
&& debug_info_p != NULL)
{
switch (attribute)
{
case DW_AT_frame_base:
have_frame_base = 1;
/* Fall through. */
case DW_AT_location:
case DW_AT_GNU_locviews:
case DW_AT_string_length:
case DW_AT_return_addr:
case DW_AT_data_member_location:
case DW_AT_vtable_elem_location:
case DW_AT_segment:
case DW_AT_static_link:
case DW_AT_use_location:
case DW_AT_call_value:
case DW_AT_GNU_call_site_value:
case DW_AT_call_data_value:
case DW_AT_GNU_call_site_data_value:
case DW_AT_call_target:
case DW_AT_GNU_call_site_target:
case DW_AT_call_target_clobbered:
case DW_AT_GNU_call_site_target_clobbered:
if ((dwarf_version < 4
&& (form == DW_FORM_data4 || form == DW_FORM_data8))
|| form == DW_FORM_sec_offset)
{
/* Process location list. */
unsigned int lmax = debug_info_p->max_loc_offsets;
unsigned int num = debug_info_p->num_loc_offsets;
if (lmax == 0 || num >= lmax)
{
lmax += 1024;
debug_info_p->loc_offsets = (dwarf_vma *)
xcrealloc (debug_info_p->loc_offsets,
lmax, sizeof (*debug_info_p->loc_offsets));
debug_info_p->loc_views = (dwarf_vma *)
xcrealloc (debug_info_p->loc_views,
lmax, sizeof (*debug_info_p->loc_views));
debug_info_p->have_frame_base = (int *)
xcrealloc (debug_info_p->have_frame_base,
lmax, sizeof (*debug_info_p->have_frame_base));
debug_info_p->max_loc_offsets = lmax;
}
if (this_set != NULL)
uvalue += this_set->section_offsets [DW_SECT_LOC];
debug_info_p->have_frame_base [num] = have_frame_base;
if (attribute != DW_AT_GNU_locviews)
{
/* Corrupt DWARF info can produce more offsets than views.
See PR 23062 for an example. */
if (debug_info_p->num_loc_offsets
> debug_info_p->num_loc_views)
warn (_("More location offset attributes than DW_AT_GNU_locview attributes\n"));
else
{
debug_info_p->loc_offsets [num] = uvalue;
debug_info_p->num_loc_offsets++;
}
}
else
{
assert (debug_info_p->num_loc_views <= num);
num = debug_info_p->num_loc_views;
if (num > debug_info_p->num_loc_offsets)
warn (_("More DW_AT_GNU_locview attributes than location offset attributes\n"));
else
{
debug_info_p->loc_views [num] = uvalue;
debug_info_p->num_loc_views++;
}
}
}
break;
case DW_AT_low_pc:
if (need_base_address)
debug_info_p->base_address = uvalue;
break;
case DW_AT_GNU_addr_base: