/* DWARF 2 support.
- Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
+ Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
/* The DW_AT_comp_dir attribute. */
char* comp_dir;
- /* True if there is a line number table associated with this comp. unit. */
+ /* TRUE if there is a line number table associated with this comp. unit. */
int stmtlist;
/* The offset into .debug_line of the line number table. */
static void arange_add PARAMS ((struct comp_unit *, bfd_vma, bfd_vma));
static struct line_info_table *decode_line_info
PARAMS ((struct comp_unit *, struct dwarf2_debug *));
-static boolean lookup_address_in_line_info_table
+static bfd_boolean lookup_address_in_line_info_table
PARAMS ((struct line_info_table *, bfd_vma, struct funcinfo *,
const char **, unsigned int *));
-static boolean lookup_address_in_function_table
+static bfd_boolean lookup_address_in_function_table
PARAMS ((struct funcinfo *, bfd_vma, struct funcinfo **, const char **));
-static boolean scan_unit_for_functions PARAMS ((struct comp_unit *));
-static bfd_vma find_rela_addend
- PARAMS ((bfd *, asection *, bfd_size_type, asymbol**));
+static bfd_boolean scan_unit_for_functions PARAMS ((struct comp_unit *));
static struct comp_unit *parse_comp_unit
PARAMS ((bfd *, struct dwarf2_debug *, bfd_vma, unsigned int));
-static boolean comp_unit_contains_address
+static bfd_boolean comp_unit_contains_address
PARAMS ((struct comp_unit *, bfd_vma));
-static boolean comp_unit_find_nearest_line
+static bfd_boolean comp_unit_find_nearest_line
PARAMS ((struct comp_unit *, bfd_vma, const char **, const char **,
unsigned int *, struct dwarf2_debug *));
static asection *find_debug_info PARAMS ((bfd *, asection *));
}
stash->dwarf_abbrev_size = msec->_raw_size;
- stash->dwarf_abbrev_buffer = (char*) bfd_alloc (abfd, msec->_raw_size);
+ stash->dwarf_abbrev_buffer
+ = bfd_simple_get_relocated_section_contents (abfd, msec, NULL,
+ stash->syms);
if (! stash->dwarf_abbrev_buffer)
return 0;
-
- if (! bfd_get_section_contents (abfd, msec, stash->dwarf_abbrev_buffer,
- (bfd_vma) 0, msec->_raw_size))
- return 0;
}
if (offset >= stash->dwarf_abbrev_size)
switch (form)
{
case DW_FORM_addr:
- /* FIXME: DWARF3 draft sais DW_FORM_ref_addr is offset_size. */
+ /* FIXME: DWARF3 draft says DW_FORM_ref_addr is offset_size. */
case DW_FORM_ref_addr:
DW_ADDR (attr) = read_address (unit, info_ptr);
info_ptr += unit->addr_size;
bfd_vma high;
};
-/* add_line_info: adds a new entry to the line_info list in the
- line_info_table, ensuring that the list is sorted. Note that the
- line_info list is sorted from highest to lowest VMA (with possible
- duplicates); that is, line_info->prev_line always accesses an equal
- or smaller VMA. */
+/* Adds a new entry to the line_info list in the line_info_table, ensuring
+ that the list is sorted. Note that the line_info list is sorted from
+ highest to lowest VMA (with possible duplicates); that is,
+ line_info->prev_line always accesses an equal or smaller VMA. */
+
static void
add_line_info (table, address, filename, line, column, end_sequence)
struct line_info_table* table;
/* Set member data of 'info'. */
info->address = address;
- info->filename = filename;
info->line = line;
info->column = column;
info->end_sequence = end_sequence;
+
+ amt = strlen (filename);
+ if (amt)
+ {
+ info->filename = bfd_alloc (table->abfd, amt + 1);
+ if (info->filename)
+ strcpy (info->filename, filename);
+ }
+ else
+ info->filename = NULL;
}
+/* Extract a fully qualified filename from a line info table.
+ The returned string has been malloc'ed and it is the caller's
+ responsibility to free it. */
+
static char *
concat_filename (table, file)
struct line_info_table* table;
{
(*_bfd_error_handler)
(_("Dwarf Error: mangled line number section (bad file number)."));
- return "<unknown>";
+ return strdup ("<unknown>");
}
filename = table->files[file - 1].name;
- if (IS_ABSOLUTE_PATH(filename))
- return filename;
- else
+
+ if (! IS_ABSOLUTE_PATH (filename))
{
char* dirname = (table->files[file - 1].dir
? table->dirs[table->files[file - 1].dir - 1]
: table->comp_dir);
- /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. The
- best we can do is return the filename part. */
- if (dirname == NULL)
- return filename;
- else
- return (char*) concat (dirname, "/", filename, NULL);
+ /* Not all tools set DW_AT_comp_dir, so dirname may be unknown.
+ The best we can do is return the filename part. */
+ if (dirname != NULL)
+ {
+ unsigned int len = strlen (dirname) + strlen (filename) + 2;
+ char * name;
+
+ name = bfd_malloc (len);
+ if (name)
+ sprintf (name, "%s/%s", dirname, filename);
+ return name;
+ }
}
+
+ return strdup (filename);
}
static void
}
stash->dwarf_line_size = msec->_raw_size;
- stash->dwarf_line_buffer = (char *) bfd_alloc (abfd, msec->_raw_size);
+ stash->dwarf_line_buffer
+ = bfd_simple_get_relocated_section_contents (abfd, msec, NULL,
+ stash->syms);
if (! stash->dwarf_line_buffer)
return 0;
-
- if (! bfd_get_section_contents (abfd, msec, stash->dwarf_line_buffer,
- (bfd_vma) 0, msec->_raw_size))
- return 0;
-
- /* FIXME: We ought to apply the relocs against this section before
- we process it... */
}
- /* Since we are using un-relocated data, it is possible to get a bad value
- for the line_offset. Validate it here so that we won't get a segfault
- below. */
+ /* It is possible to get a bad value for the line_offset. Validate
+ it here so that we won't get a segfault below. */
if (unit->line_offset >= stash->dwarf_line_size)
{
(*_bfd_error_handler) (_("Dwarf Error: Line offset (%lu) greater than or equal to .debug_line size (%lu)."),
based, the references are 1 based. */
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
+ if (filename)
+ free (filename);
filename = concat_filename (table, file);
break;
}
default:
{
int i;
+
/* Unknown standard opcode, ignore it. */
for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++)
{
}
}
}
+
+ if (filename)
+ free (filename);
}
return table;
}
-/* If ADDR is within TABLE set the output parameters and return true,
- otherwise return false. The output parameters, FILENAME_PTR and
+/* If ADDR is within TABLE set the output parameters and return TRUE,
+ otherwise return FALSE. The output parameters, FILENAME_PTR and
LINENUMBER_PTR, are pointers to the objects to be filled in. */
-static boolean
+static bfd_boolean
lookup_address_in_line_info_table (table, addr, function, filename_ptr,
linenumber_ptr)
struct line_info_table* table;
*filename_ptr = NULL;
if (!next_line)
- return false;
+ return FALSE;
each_line = next_line->prev_line;
/* If we have an address match, save this info. This allows us
to return as good as results as possible for strange debugging
info. */
- boolean addr_match = false;
+ bfd_boolean addr_match = FALSE;
if (each_line->address <= addr && addr <= next_line->address)
{
- addr_match = true;
+ addr_match = TRUE;
/* If this line appears to span functions, and addr is in the
later function, return the first line of that function instead
}
if (addr_match && !each_line->end_sequence)
- return true; /* we have definitely found what we want */
+ return TRUE; /* we have definitely found what we want */
next_line = each_line;
each_line = each_line->prev_line;
{
*filename_ptr = next_line->filename;
*linenumber_ptr = next_line->line;
- return true;
+ return TRUE;
}
- return false;
+ return FALSE;
}
/* Function table functions. */
-/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return true. */
+/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return TRUE. */
-static boolean
+static bfd_boolean
lookup_address_in_function_table (table, addr, function_ptr,
functionname_ptr)
struct funcinfo* table;
{
*functionname_ptr = each_func->name;
*function_ptr = each_func;
- return true;
+ return TRUE;
}
}
- return false;
+ return FALSE;
}
/* DWARF2 Compilation unit functions. */
/* Scan over each die in a comp. unit looking for functions to add
to the function table. */
-static boolean
+static bfd_boolean
scan_unit_for_functions (unit)
struct comp_unit *unit;
{
(*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."),
abbrev_number);
bfd_set_error (bfd_error_bad_value);
- return false;
+ return FALSE;
}
if (abbrev->tag == DW_TAG_subprogram)
nesting_level++;
}
- return true;
-}
-
-/* Look for a RELA relocation to be applied on OFFSET of section SEC,
- and return the addend if such a relocation is found. Since this is
- only used to find relocations referring to the .debug_abbrev
- section, we make sure the relocation refers to this section, but
- this is not strictly necessary, and it can probably be safely
- removed if needed. However, it is important to note that this
- function only returns the addend, it doesn't serve the purpose of
- applying a generic relocation.
-
- If no suitable relocation is found, or if it is not a real RELA
- relocation, this function returns 0. */
-
-static bfd_vma
-find_rela_addend (abfd, sec, offset, syms)
- bfd* abfd;
- asection* sec;
- bfd_size_type offset;
- asymbol** syms;
-{
- long reloc_size = bfd_get_reloc_upper_bound (abfd, sec);
- arelent **relocs = NULL;
- long reloc_count, relc;
-
- if (reloc_size <= 0)
- return 0;
-
- relocs = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
- if (relocs == NULL)
- return 0;
-
- reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, syms);
-
- if (reloc_count <= 0)
- {
- free (relocs);
- return 0;
- }
-
- for (relc = 0; relc < reloc_count; relc++)
- if (relocs[relc]->address == offset
- && (*relocs[relc]->sym_ptr_ptr)->flags & BSF_SECTION_SYM
- && strcmp ((*relocs[relc]->sym_ptr_ptr)->name,
- ".debug_abbrev") == 0)
- {
- bfd_vma addend = (relocs[relc]->howto->partial_inplace
- ? 0 : relocs[relc]->addend);
- free (relocs);
- return addend;
- }
-
- free (relocs);
- return 0;
+ return TRUE;
}
/* Parse a DWARF2 compilation unit starting at INFO_PTR. This
char *info_ptr = stash->info_ptr;
char *end_ptr = info_ptr + unit_length;
bfd_size_type amt;
- bfd_size_type off;
version = read_2_bytes (abfd, info_ptr);
info_ptr += 2;
abbrev_offset = read_4_bytes (abfd, info_ptr);
else
abbrev_offset = read_8_bytes (abfd, info_ptr);
- /* The abbrev offset is generally a relocation pointing to
- .debug_abbrev+offset. On RELA targets, we have to find the
- relocation and extract the addend to obtain the actual
- abbrev_offset, so do it here. */
- off = info_ptr - stash->sec_info_ptr;
- abbrev_offset += find_rela_addend (abfd, stash->sec, off, stash->syms);
info_ptr += offset_size;
addr_size = read_1_byte (abfd, info_ptr);
info_ptr += 1;
return unit;
}
-/* Return true if UNIT contains the address given by ADDR. */
+/* Return TRUE if UNIT contains the address given by ADDR. */
-static boolean
+static bfd_boolean
comp_unit_contains_address (unit, addr)
struct comp_unit* unit;
bfd_vma addr;
struct arange *arange;
if (unit->error)
- return false;
+ return FALSE;
arange = &unit->arange;
do
{
if (addr >= arange->low && addr < arange->high)
- return true;
+ return TRUE;
arange = arange->next;
}
while (arange);
- return false;
+ return FALSE;
}
/* If UNIT contains ADDR, set the output parameters to the values for
FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects
to be filled in.
- Return true of UNIT contains ADDR, and no errors were encountered;
- false otherwise. */
+ Return TRUE if UNIT contains ADDR, and no errors were encountered;
+ FALSE otherwise. */
-static boolean
+static bfd_boolean
comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr,
linenumber_ptr, stash)
struct comp_unit* unit;
unsigned int *linenumber_ptr;
struct dwarf2_debug *stash;
{
- boolean line_p;
- boolean func_p;
+ bfd_boolean line_p;
+ bfd_boolean func_p;
struct funcinfo *function;
if (unit->error)
- return false;
+ return FALSE;
if (! unit->line_table)
{
if (! unit->stmtlist)
{
unit->error = 1;
- return false;
+ return FALSE;
}
unit->line_table = decode_line_info (unit, stash);
if (! unit->line_table)
{
unit->error = 1;
- return false;
+ return FALSE;
}
if (unit->first_child_die_ptr < unit->end_ptr
&& ! scan_unit_for_functions (unit))
{
unit->error = 1;
- return false;
+ return FALSE;
}
}
line_p = lookup_address_in_line_info_table (unit->line_table, addr,
function, filename_ptr,
linenumber_ptr);
- return (boolean) (line_p || func_p);
+ return line_p || func_p;
}
/* Locate a section in a BFD containing debugging info. The search starts
return NULL;
}
-/* The DWARF2 version of find_nearest line. Return true if the line
+/* The DWARF2 version of find_nearest line. Return TRUE if the line
is found without error. ADDR_SIZE is the number of bytes in the
initial .debug_info length field and in the abbreviation offset.
You may use zero to indicate that the default value should be
used. */
-boolean
+bfd_boolean
_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
filename_ptr, functionname_ptr,
linenumber_ptr, addr_size, pinfo)
stash = (struct dwarf2_debug*) bfd_zalloc (abfd, amt);
if (! stash)
- return false;
+ return FALSE;
*pinfo = (PTR) stash;
/* No dwarf2 info. Note that at this point the stash
has been allocated, but contains zeros, this lets
future calls to this function fail quicker. */
- return false;
+ return FALSE;
/* There can be more than one DWARF2 info section in a BFD these days.
Read them all in and produce one large stash. We do this in two
stash->info_ptr = (char *) bfd_alloc (abfd, total_size);
if (stash->info_ptr == NULL)
- return false;
+ return FALSE;
stash->info_ptr_end = stash->info_ptr;
start = stash->info_ptr_end - stash->info_ptr;
- if (! bfd_get_section_contents (abfd, msec, stash->info_ptr + start,
- (bfd_vma) 0, size))
+ if ((bfd_simple_get_relocated_section_contents
+ (abfd, msec, stash->info_ptr + start, symbols)) == NULL)
continue;
stash->info_ptr_end = stash->info_ptr + start + size;
stash->syms = symbols;
}
- /* FIXME: There is a problem with the contents of the
- .debug_info section. The 'low' and 'high' addresses of the
- comp_units are computed by relocs against symbols in the
- .text segment. We need these addresses in order to determine
- the nearest line number, and so we have to resolve the
- relocs. There is a similar problem when the .debug_line
- section is processed as well (e.g., there may be relocs
- against the operand of the DW_LNE_set_address operator).
-
- Unfortunately getting hold of the reloc information is hard...
-
- For now, this means that disassembling object files (as
- opposed to fully executables) does not always work as well as
- we would like. */
-
/* A null info_ptr indicates that there is no dwarf2 info
(or that an error occured while setting up the stash). */
if (! stash->info_ptr)
- return false;
+ return FALSE;
/* Check the previously read comp. units first. */
for (each = stash->all_comp_units; each; each = each->next_unit)
while (stash->info_ptr < stash->info_ptr_end)
{
bfd_vma length;
- boolean found;
+ bfd_boolean found;
unsigned int offset_size = addr_size;
- if (addr_size == 4)
+ length = read_4_bytes (abfd, stash->info_ptr);
+ /* A 0xffffff length is the DWARF3 way of indicating we use
+ 64-bit offsets, instead of 32-bit offsets. */
+ if (length == 0xffffffff)
{
- length = read_4_bytes (abfd, stash->info_ptr);
- if (length == 0xffffffff)
- {
- offset_size = 8;
- length = read_8_bytes (abfd, stash->info_ptr + 4);
- stash->info_ptr += 8;
- }
- else if (length == 0)
- {
- /* Handle (non-standard) 64-bit DWARF2 formats. */
- offset_size = 8;
- length = read_4_bytes (abfd, stash->info_ptr + 4);
- stash->info_ptr += 4;
- }
+ offset_size = 8;
+ length = read_8_bytes (abfd, stash->info_ptr + 4);
+ stash->info_ptr += 12;
+ }
+ /* A zero length is the IRIX way of indicating 64-bit offsets,
+ mostly because the 64-bit length will generally fit in 32
+ bits, and the endianness helps. */
+ else if (length == 0)
+ {
+ offset_size = 8;
+ length = read_4_bytes (abfd, stash->info_ptr + 4);
+ stash->info_ptr += 8;
+ }
+ /* In the absence of the hints above, we assume addr_size-sized
+ offsets, for backward-compatibility with pre-DWARF3 64-bit
+ platforms. */
+ else if (addr_size == 8)
+ {
+ length = read_8_bytes (abfd, stash->info_ptr);
+ stash->info_ptr += 8;
}
else
- length = read_8_bytes (abfd, stash->info_ptr);
- stash->info_ptr += addr_size;
+ stash->info_ptr += 4;
if (length > 0)
{
{
if (comp_unit_contains_address (each, addr))
return comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- functionname_ptr,
- linenumber_ptr,
- stash);
+ filename_ptr,
+ functionname_ptr,
+ linenumber_ptr,
+ stash);
}
else
{
linenumber_ptr,
stash);
if (found)
- return true;
+ return TRUE;
}
}
}
}
- return false;
+ return FALSE;
}
projects / binutils-gdb.git / blobdiff