/* DWARF 2 support.
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
(gavin@cygnus.com).
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 2 of the License, or (at
+ 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
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libiberty.h"
#include "libbfd.h"
#include "elf-bfd.h"
bfd_byte *data;
};
+struct adjusted_section
+{
+ asection *section;
+ bfd_vma adj_vma;
+};
+
struct dwarf2_debug
{
/* A list of all previously read comp_units. */
struct comp_unit *all_comp_units;
+ /* Last comp unit in list above. */
+ struct comp_unit *last_comp_unit;
+
/* The next unread compilation unit within the .debug_info section.
Zero indicates that the .debug_info section has not been loaded
into a buffer yet. */
/* Pointer to the end of the .debug_info section memory buffer. */
bfd_byte *info_ptr_end;
- /* Pointer to the section and address of the beginning of the
- section. */
+ /* Pointer to the bfd, section and address of the beginning of the
+ section. The bfd might be different than expected because of
+ gnu_debuglink sections. */
+ bfd * bfd;
asection *sec;
bfd_byte *sec_info_ptr;
+ /* A pointer to the memory block allocated for info_ptr. Neither
+ info_ptr nor sec_info_ptr are guaranteed to stay pointing to the
+ beginning of the malloc block. This is used only to free the
+ memory later. */
+ bfd_byte *info_ptr_memory;
+
/* Pointer to the symbol table. */
asymbol **syms;
bfd_byte *dwarf_abbrev_buffer;
/* Length of the loaded .debug_abbrev section. */
- unsigned long dwarf_abbrev_size;
+ bfd_size_type dwarf_abbrev_size;
/* Buffer for decode_line_info. */
bfd_byte *dwarf_line_buffer;
/* Length of the loaded .debug_line section. */
- unsigned long dwarf_line_size;
+ bfd_size_type dwarf_line_size;
/* Pointer to the .debug_str section loaded into memory. */
bfd_byte *dwarf_str_buffer;
/* Length of the loaded .debug_str section. */
- unsigned long dwarf_str_size;
+ bfd_size_type dwarf_str_size;
+
+ /* Pointer to the .debug_ranges section loaded into memory. */
+ bfd_byte *dwarf_ranges_buffer;
+
+ /* Length of the loaded .debug_ranges section. */
+ bfd_size_type dwarf_ranges_size;
+
+ /* If the most recent call to bfd_find_nearest_line was given an
+ address in an inlined function, preserve a pointer into the
+ calling chain for subsequent calls to bfd_find_inliner_info to
+ use. */
+ struct funcinfo *inliner_chain;
+
+ /* Number of sections whose VMA we must adjust. */
+ unsigned int adjusted_section_count;
+
+ /* Array of sections with adjusted VMA. */
+ struct adjusted_section *adjusted_sections;
+
+ /* Number of times find_line is called. This is used in
+ the heuristic for enabling the info hash tables. */
+ int info_hash_count;
+
+#define STASH_INFO_HASH_TRIGGER 100
+
+ /* Hash table mapping symbol names to function infos. */
+ struct info_hash_table *funcinfo_hash_table;
+
+ /* Hash table mapping symbol names to variable infos. */
+ struct info_hash_table *varinfo_hash_table;
+
+ /* Head of comp_unit list in the last hash table update. */
+ struct comp_unit *hash_units_head;
+
+ /* Status of info hash. */
+ int info_hash_status;
+#define STASH_INFO_HASH_OFF 0
+#define STASH_INFO_HASH_ON 1
+#define STASH_INFO_HASH_DISABLED 2
};
struct arange
/* Chain the previously read compilation units. */
struct comp_unit *next_unit;
- /* Keep the bdf convenient (for memory allocation). */
+ /* Likewise, chain the compilation unit read after this one.
+ The comp units are stored in reversed reading order. */
+ struct comp_unit *prev_unit;
+
+ /* Keep the bfd convenient (for memory allocation). */
bfd *abfd;
- /* The lowest and higest addresses contained in this compilation
+ /* The lowest and highest addresses contained in this compilation
unit as specified in the compilation unit header. */
struct arange arange;
/* A list of the functions found in this comp. unit. */
struct funcinfo *function_table;
+ /* A list of the variables found in this comp. unit. */
+ struct varinfo *variable_table;
+
/* Pointer to dwarf2_debug structure. */
struct dwarf2_debug *stash;
+ /* DWARF format version for this unit - from unit header. */
+ int version;
+
/* Address size for this unit - from unit header. */
unsigned char addr_size;
/* Offset size for this unit - from unit header. */
unsigned char offset_size;
+
+ /* Base address for this unit - from DW_AT_low_pc attribute of
+ DW_TAG_compile_unit DIE */
+ bfd_vma base_address;
+
+ /* TRUE if symbols are cached in hash table for faster lookup by name. */
+ bfd_boolean cached;
};
/* This data structure holds the information of an abbrev. */
#define ATTR_ALLOC_CHUNK 4
#endif
+/* Variable and function hash tables. This is used to speed up look-up
+ in lookup_symbol_in_var_table() and lookup_symbol_in_function_table().
+ In order to share code between variable and function infos, we use
+ a list of untyped pointer for all variable/function info associated with
+ a symbol. We waste a bit of memory for list with one node but that
+ simplifies the code. */
+
+struct info_list_node
+{
+ struct info_list_node *next;
+ void *info;
+};
+
+/* Info hash entry. */
+struct info_hash_entry
+{
+ struct bfd_hash_entry root;
+ struct info_list_node *head;
+};
+
+struct info_hash_table
+{
+ struct bfd_hash_table base;
+};
+
+/* Function to create a new entry in info hash table. */
+
+static struct bfd_hash_entry *
+info_hash_table_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
+{
+ struct info_hash_entry *ret = (struct info_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ derived class. */
+ if (ret == NULL)
+ {
+ ret = bfd_hash_allocate (table, sizeof (* ret));
+ if (ret == NULL)
+ return NULL;
+ }
+
+ /* Call the allocation method of the base class. */
+ ret = ((struct info_hash_entry *)
+ bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
+
+ /* Initialize the local fields here. */
+ if (ret)
+ ret->head = NULL;
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Function to create a new info hash table. It returns a pointer to the
+ newly created table or NULL if there is any error. We need abfd
+ solely for memory allocation. */
+
+static struct info_hash_table *
+create_info_hash_table (bfd *abfd)
+{
+ struct info_hash_table *hash_table;
+
+ hash_table = bfd_alloc (abfd, sizeof (struct info_hash_table));
+ if (!hash_table)
+ return hash_table;
+
+ if (!bfd_hash_table_init (&hash_table->base, info_hash_table_newfunc,
+ sizeof (struct info_hash_entry)))
+ {
+ bfd_release (abfd, hash_table);
+ return NULL;
+ }
+
+ return hash_table;
+}
+
+/* Insert an info entry into an info hash table. We do not check of
+ duplicate entries. Also, the caller need to guarantee that the
+ right type of info in inserted as info is passed as a void* pointer.
+ This function returns true if there is no error. */
+
+static bfd_boolean
+insert_info_hash_table (struct info_hash_table *hash_table,
+ const char *key,
+ void *info,
+ bfd_boolean copy_p)
+{
+ struct info_hash_entry *entry;
+ struct info_list_node *node;
+
+ entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base,
+ key, TRUE, copy_p);
+ if (!entry)
+ return FALSE;
+
+ node = bfd_hash_allocate (&hash_table->base, sizeof (*node));
+ if (!node)
+ return FALSE;
+
+ node->info = info;
+ node->next = entry->head;
+ entry->head = node;
+
+ return TRUE;
+}
+
+/* Look up an info entry list from an info hash table. Return NULL
+ if there is none. */
+
+static struct info_list_node *
+lookup_info_hash_table (struct info_hash_table *hash_table, const char *key)
+{
+ struct info_hash_entry *entry;
+
+ entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, key,
+ FALSE, FALSE);
+ return entry ? entry->head : NULL;
+}
+
+/* Read a section into its appropriate place in the dwarf2_debug
+ struct (indicated by SECTION_BUFFER and SECTION_SIZE). If SYMS is
+ not NULL, use bfd_simple_get_relocated_section_contents to read the
+ section contents, otherwise use bfd_get_section_contents. Fail if
+ the located section does not contain at least OFFSET bytes. */
+
+static bfd_boolean
+read_section (bfd * abfd,
+ const char * section_name,
+ const char * compressed_section_name,
+ asymbol ** syms,
+ bfd_uint64_t offset,
+ bfd_byte ** section_buffer,
+ bfd_size_type * section_size)
+{
+ asection *msec;
+ bfd_boolean section_is_compressed = FALSE;
+
+ /* read_section is a noop if the section has already been read. */
+ if (!*section_buffer)
+ {
+ msec = bfd_get_section_by_name (abfd, section_name);
+ if (! msec && compressed_section_name)
+ {
+ msec = bfd_get_section_by_name (abfd, compressed_section_name);
+ section_is_compressed = TRUE;
+ }
+ if (! msec)
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: Can't find %s section."), section_name);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ *section_size = msec->rawsize ? msec->rawsize : msec->size;
+ if (syms)
+ {
+ *section_buffer
+ = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, syms);
+ if (! *section_buffer)
+ return FALSE;
+ }
+ else
+ {
+ *section_buffer = bfd_malloc (*section_size);
+ if (! *section_buffer)
+ return FALSE;
+ if (! bfd_get_section_contents (abfd, msec, *section_buffer,
+ 0, *section_size))
+ return FALSE;
+ }
+
+ if (section_is_compressed)
+ {
+ if (! bfd_uncompress_section_contents (section_buffer, section_size))
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: unable to decompress %s section."), compressed_section_name);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ }
+ }
+
+ /* It is possible to get a bad value for the offset into the section
+ that the client wants. Validate it here to avoid trouble later. */
+ if (offset != 0 && offset >= *section_size)
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: Offset (%lu) greater than or equal to %s size (%lu)."),
+ (long) offset, section_name, *section_size);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
/* VERBATIM
The following function up to the END VERBATIM mark are
copied directly from dwarf2read.c. */
bfd_byte *buf,
unsigned int size ATTRIBUTE_UNUSED)
{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the buffer, otherwise we have to copy the data to a buffer
- allocated on the temporary obstack. */
return buf;
}
{
/* Return a pointer to the embedded string. */
char *str = (char *) buf;
+
if (*str == '\0')
{
*bytes_read_ptr = 1;
return str;
}
+/* END VERBATIM */
+
static char *
-read_indirect_string (struct comp_unit* unit,
- bfd_byte *buf,
- unsigned int *bytes_read_ptr)
+read_indirect_string (struct comp_unit * unit,
+ bfd_byte * buf,
+ unsigned int * bytes_read_ptr)
{
bfd_uint64_t offset;
struct dwarf2_debug *stash = unit->stash;
offset = read_4_bytes (unit->abfd, buf);
else
offset = read_8_bytes (unit->abfd, buf);
- *bytes_read_ptr = unit->offset_size;
-
- if (! stash->dwarf_str_buffer)
- {
- asection *msec;
- bfd *abfd = unit->abfd;
- bfd_size_type sz;
-
- msec = bfd_get_section_by_name (abfd, ".debug_str");
- if (! msec)
- {
- (*_bfd_error_handler)
- (_("Dwarf Error: Can't find .debug_str section."));
- bfd_set_error (bfd_error_bad_value);
- return NULL;
- }
-
- sz = msec->rawsize ? msec->rawsize : msec->size;
- stash->dwarf_str_size = sz;
- stash->dwarf_str_buffer = bfd_alloc (abfd, sz);
- if (! stash->dwarf_abbrev_buffer)
- return NULL;
- if (! bfd_get_section_contents (abfd, msec, stash->dwarf_str_buffer,
- 0, sz))
- return NULL;
- }
+ *bytes_read_ptr = unit->offset_size;
- if (offset >= stash->dwarf_str_size)
- {
- (*_bfd_error_handler) (_("Dwarf Error: DW_FORM_strp offset (%lu) greater than or equal to .debug_str size (%lu)."),
- (unsigned long) offset, stash->dwarf_str_size);
- bfd_set_error (bfd_error_bad_value);
- return NULL;
- }
+ if (! read_section (unit->abfd, ".debug_str", ".zdebug_str",
+ stash->syms, offset,
+ &stash->dwarf_str_buffer, &stash->dwarf_str_size))
+ return NULL;
str = (char *) stash->dwarf_str_buffer + offset;
if (*str == '\0')
return str;
}
-/* END VERBATIM */
-
static bfd_uint64_t
read_address (struct comp_unit *unit, bfd_byte *buf)
{
- switch (unit->addr_size)
+ int signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma;
+
+ if (signed_vma)
{
- case 8:
- return bfd_get_64 (unit->abfd, buf);
- case 4:
- return bfd_get_32 (unit->abfd, buf);
- case 2:
- return bfd_get_16 (unit->abfd, buf);
- default:
- abort ();
+ switch (unit->addr_size)
+ {
+ case 8:
+ return bfd_get_signed_64 (unit->abfd, buf);
+ case 4:
+ return bfd_get_signed_32 (unit->abfd, buf);
+ case 2:
+ return bfd_get_signed_16 (unit->abfd, buf);
+ default:
+ abort ();
+ }
+ }
+ else
+ {
+ switch (unit->addr_size)
+ {
+ case 8:
+ return bfd_get_64 (unit->abfd, buf);
+ case 4:
+ return bfd_get_32 (unit->abfd, buf);
+ case 2:
+ return bfd_get_16 (unit->abfd, buf);
+ default:
+ abort ();
+ }
}
}
unsigned int abbrev_form, hash_number;
bfd_size_type amt;
- if (! stash->dwarf_abbrev_buffer)
- {
- asection *msec;
-
- msec = bfd_get_section_by_name (abfd, ".debug_abbrev");
- if (! msec)
- {
- (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_abbrev section."));
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
-
- stash->dwarf_abbrev_size = msec->size;
- stash->dwarf_abbrev_buffer
- = bfd_simple_get_relocated_section_contents (abfd, msec, NULL,
- stash->syms);
- if (! stash->dwarf_abbrev_buffer)
- return 0;
- }
-
- if (offset >= stash->dwarf_abbrev_size)
- {
- (*_bfd_error_handler) (_("Dwarf Error: Abbrev offset (%lu) greater than or equal to .debug_abbrev size (%lu)."),
- (unsigned long) offset, stash->dwarf_abbrev_size);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
+ if (! read_section (abfd, ".debug_abbrev", ".zdebug_abbrev",
+ stash->syms, offset,
+ &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size))
+ return 0;
amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE;
abbrevs = bfd_zalloc (abfd, amt);
{
if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
{
+ struct attr_abbrev *tmp;
+
amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK;
amt *= sizeof (struct attr_abbrev);
- cur_abbrev->attrs = bfd_realloc (cur_abbrev->attrs, amt);
- if (! cur_abbrev->attrs)
- return 0;
+ tmp = bfd_realloc (cur_abbrev->attrs, amt);
+ if (tmp == NULL)
+ {
+ size_t i;
+
+ for (i = 0; i < ABBREV_HASH_SIZE; i++)
+ {
+ struct abbrev_info *abbrev = abbrevs[i];
+
+ while (abbrev)
+ {
+ free (abbrev->attrs);
+ abbrev = abbrev->next;
+ }
+ }
+ return NULL;
+ }
+ cur_abbrev->attrs = tmp;
}
cur_abbrev->attrs[cur_abbrev->num_attrs].name
for the next compile unit) or if the end of the abbreviation
table is reached. */
if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer)
- >= stash->dwarf_abbrev_size)
+ >= stash->dwarf_abbrev_size)
break;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
switch (form)
{
- case DW_FORM_addr:
- /* FIXME: DWARF3 draft says DW_FORM_ref_addr is offset_size. */
case DW_FORM_ref_addr:
+ /* DW_FORM_ref_addr is an address in DWARF2, and an offset in
+ DWARF3. */
+ if (unit->version == 3)
+ {
+ if (unit->offset_size == 4)
+ attr->u.val = read_4_bytes (unit->abfd, info_ptr);
+ else
+ attr->u.val = read_8_bytes (unit->abfd, info_ptr);
+ info_ptr += unit->offset_size;
+ break;
+ }
+ /* FALLTHROUGH */
+ case DW_FORM_addr:
attr->u.val = read_address (unit, info_ptr);
info_ptr += unit->addr_size;
break;
struct line_info* lcl_head; /* local head; used in 'add_line_info' */
};
+/* Remember some information about each function. If the function is
+ inlined (DW_TAG_inlined_subroutine) it may have two additional
+ attributes, DW_AT_call_file and DW_AT_call_line, which specify the
+ source code location where this function was inlined. */
+
struct funcinfo
{
- struct funcinfo *prev_func;
+ struct funcinfo *prev_func; /* Pointer to previous function in list of all functions */
+ struct funcinfo *caller_func; /* Pointer to function one scope higher */
+ char *caller_file; /* Source location file name where caller_func inlines this func */
+ int caller_line; /* Source location line number where caller_func inlines this func */
+ char *file; /* Source location file name */
+ int line; /* Source location line number */
+ int tag;
char *name;
- bfd_vma low;
- bfd_vma high;
+ struct arange arange;
+ asection *sec; /* Where the symbol is defined */
+};
+
+struct varinfo
+{
+ /* Pointer to previous variable in list of all variables */
+ struct varinfo *prev_var;
+ /* Source location file name */
+ char *file;
+ /* Source location line number */
+ int line;
+ int tag;
+ char *name;
+ bfd_vma addr;
+ /* Where the symbol is defined */
+ asection *sec;
+ /* Is this a stack variable? */
+ unsigned int stack: 1;
};
+/* Return TRUE if NEW_LINE should sort after LINE. */
+
+static inline bfd_boolean
+new_line_sorts_after (struct line_info *new_line, struct line_info *line)
+{
+ return (new_line->address > line->address
+ || (new_line->address == line->address
+ && new_line->end_sequence < line->end_sequence));
+}
+
+
/* 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,
bfd_size_type amt = sizeof (struct line_info);
struct line_info* info = bfd_alloc (table->abfd, amt);
+ /* Set member data of 'info'. */
+ info->address = address;
+ info->line = line;
+ info->column = column;
+ info->end_sequence = end_sequence;
+
+ if (filename && filename[0])
+ {
+ info->filename = bfd_alloc (table->abfd, strlen (filename) + 1);
+ if (info->filename)
+ strcpy (info->filename, filename);
+ }
+ else
+ info->filename = NULL;
+
/* Find the correct location for 'info'. Normally we will receive
new line_info data 1) in order and 2) with increasing VMAs.
However some compilers break the rules (cf. decode_line_info) and
Note: we may receive duplicate entries from 'decode_line_info'. */
- while (1)
- if (!table->last_line
- || address >= table->last_line->address)
- {
- /* Normal case: add 'info' to the beginning of the list */
- info->prev_line = table->last_line;
- table->last_line = info;
-
- /* lcl_head: initialize to head a *possible* sequence at the end. */
- if (!table->lcl_head)
- table->lcl_head = info;
- break;
- }
- else if (!table->lcl_head->prev_line
- && table->lcl_head->address > address)
- {
- /* Abnormal but easy: lcl_head is 1) at the *end* of the line
- list and 2) the head of 'info'. */
- info->prev_line = NULL;
- table->lcl_head->prev_line = info;
- break;
- }
- else if (table->lcl_head->prev_line
- && table->lcl_head->address > address
- && address >= table->lcl_head->prev_line->address)
- {
- /* Abnormal but easy: lcl_head is 1) in the *middle* of the line
- list and 2) the head of 'info'. */
- info->prev_line = table->lcl_head->prev_line;
- table->lcl_head->prev_line = info;
- break;
- }
- else
- {
- /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' are valid
- heads for 'info'. Reset 'lcl_head' and repeat. */
- struct line_info* li2 = table->last_line; /* always non-NULL */
- struct line_info* li1 = li2->prev_line;
-
- while (li1)
- {
- if (li2->address > address && address >= li1->address)
- break;
-
- li2 = li1; /* always non-NULL */
- li1 = li1->prev_line;
- }
- table->lcl_head = li2;
- }
-
- /* Set member data of 'info'. */
- info->address = address;
- info->line = line;
- info->column = column;
- info->end_sequence = end_sequence;
+ if (table->last_line
+ && table->last_line->address == address
+ && table->last_line->end_sequence == end_sequence)
+ {
+ /* We only keep the last entry with the same address and end
+ sequence. See PR ld/4986. */
+ if (table->lcl_head == table->last_line)
+ table->lcl_head = info;
+ info->prev_line = table->last_line->prev_line;
+ table->last_line = info;
+ }
+ else if (!table->last_line
+ || new_line_sorts_after (info, table->last_line))
+ {
+ /* Normal case: add 'info' to the beginning of the list */
+ info->prev_line = table->last_line;
+ table->last_line = info;
- if (filename && filename[0])
+ /* lcl_head: initialize to head a *possible* sequence at the end. */
+ if (!table->lcl_head)
+ table->lcl_head = info;
+ }
+ else if (!new_line_sorts_after (info, table->lcl_head)
+ && (!table->lcl_head->prev_line
+ || new_line_sorts_after (info, table->lcl_head->prev_line)))
{
- info->filename = bfd_alloc (table->abfd, strlen (filename) + 1);
- if (info->filename)
- strcpy (info->filename, filename);
+ /* Abnormal but easy: lcl_head is the head of 'info'. */
+ info->prev_line = table->lcl_head->prev_line;
+ table->lcl_head->prev_line = info;
}
else
- info->filename = NULL;
+ {
+ /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' are valid
+ heads for 'info'. Reset 'lcl_head'. */
+ struct line_info* li2 = table->last_line; /* always non-NULL */
+ struct line_info* li1 = li2->prev_line;
+
+ while (li1)
+ {
+ if (!new_line_sorts_after (info, li2)
+ && new_line_sorts_after (info, li1))
+ break;
+
+ li2 = li1; /* always non-NULL */
+ li1 = li1->prev_line;
+ }
+ table->lcl_head = li2;
+ info->prev_line = table->lcl_head->prev_line;
+ table->lcl_head->prev_line = info;
+ }
}
/* Extract a fully qualified filename from a line info table.
if (file - 1 >= table->num_files)
{
- (*_bfd_error_handler)
- (_("Dwarf Error: mangled line number section (bad file number)."));
+ /* FILE == 0 means unknown. */
+ if (file)
+ (*_bfd_error_handler)
+ (_("Dwarf Error: mangled line number section (bad file number)."));
return strdup ("<unknown>");
}
filename = table->files[file - 1].name;
- if (! IS_ABSOLUTE_PATH (filename))
+ if (!IS_ABSOLUTE_PATH (filename))
{
- char *dirname = (table->files[file - 1].dir
- ? table->dirs[table->files[file - 1].dir - 1]
- : table->comp_dir);
+ char *dirname = NULL;
+ char *subdirname = NULL;
+ char *name;
+ size_t len;
- /* 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)
+ if (table->files[file - 1].dir)
+ subdirname = table->dirs[table->files[file - 1].dir - 1];
+
+ if (!subdirname || !IS_ABSOLUTE_PATH (subdirname))
+ dirname = table->comp_dir;
+
+ if (!dirname)
{
- unsigned int len = strlen (dirname) + strlen (filename) + 2;
- char * name;
+ dirname = subdirname;
+ subdirname = NULL;
+ }
+
+ if (!dirname)
+ return strdup (filename);
+ len = strlen (dirname) + strlen (filename) + 2;
+
+ if (subdirname)
+ {
+ len += strlen (subdirname) + 1;
+ name = bfd_malloc (len);
+ if (name)
+ sprintf (name, "%s/%s/%s", dirname, subdirname, filename);
+ }
+ else
+ {
name = bfd_malloc (len);
if (name)
sprintf (name, "%s/%s", dirname, filename);
- return name;
}
+
+ return name;
}
return strdup (filename);
}
static void
-arange_add (struct comp_unit *unit, bfd_vma low_pc, bfd_vma high_pc)
+arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high_pc)
{
struct arange *arange;
- /* First see if we can cheaply extend an existing range. */
- arange = &unit->arange;
+ /* If the first arange is empty, use it. */
+ if (first_arange->high == 0)
+ {
+ first_arange->low = low_pc;
+ first_arange->high = high_pc;
+ return;
+ }
+ /* Next see if we can cheaply extend an existing range. */
+ arange = first_arange;
do
{
if (low_pc == arange->high)
}
while (arange);
- if (unit->arange.high == 0)
- {
- /* This is the first address range: store it in unit->arange. */
- unit->arange.next = 0;
- unit->arange.low = low_pc;
- unit->arange.high = high_pc;
- return;
- }
-
- /* Need to allocate a new arange and insert it into the arange list. */
- arange = bfd_zalloc (unit->abfd, sizeof (*arange));
+ /* Need to allocate a new arange and insert it into the arange list.
+ Order isn't significant, so just insert after the first arange. */
+ arange = bfd_zalloc (abfd, sizeof (*arange));
arange->low = low_pc;
arange->high = high_pc;
-
- arange->next = unit->arange.next;
- unit->arange.next = arange;
+ arange->next = first_arange->next;
+ first_arange->next = arange;
}
/* Decode the line number information for UNIT. */
unsigned char op_code, extended_op, adj_opcode;
bfd_size_type amt;
- if (! stash->dwarf_line_buffer)
- {
- asection *msec;
+ if (! read_section (abfd, ".debug_line", ".zdebug_line",
+ stash->syms, unit->line_offset,
+ &stash->dwarf_line_buffer, &stash->dwarf_line_size))
+ return 0;
- msec = bfd_get_section_by_name (abfd, ".debug_line");
- if (! msec)
- {
- (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_line section."));
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
-
- stash->dwarf_line_size = msec->size;
- stash->dwarf_line_buffer
- = bfd_simple_get_relocated_section_contents (abfd, msec, NULL,
- stash->syms);
- if (! stash->dwarf_line_buffer)
- return 0;
- }
-
- /* 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)."),
- unit->line_offset, stash->dwarf_line_size);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
-
- amt = sizeof (struct line_info_table);
- table = bfd_alloc (abfd, amt);
- table->abfd = abfd;
- table->comp_dir = unit->comp_dir;
+ amt = sizeof (struct line_info_table);
+ table = bfd_alloc (abfd, amt);
+ table->abfd = abfd;
+ table->comp_dir = unit->comp_dir;
table->num_files = 0;
table->files = NULL;
if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0)
{
+ char **tmp;
+
amt = table->num_dirs + DIR_ALLOC_CHUNK;
amt *= sizeof (char *);
- table->dirs = bfd_realloc (table->dirs, amt);
- if (! table->dirs)
- return 0;
+
+ tmp = bfd_realloc (table->dirs, amt);
+ if (tmp == NULL)
+ {
+ free (table->dirs);
+ return NULL;
+ }
+ table->dirs = tmp;
}
table->dirs[table->num_dirs++] = cur_dir;
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
+ struct fileinfo *tmp;
+
amt = table->num_files + FILE_ALLOC_CHUNK;
amt *= sizeof (struct fileinfo);
- table->files = bfd_realloc (table->files, amt);
- if (! table->files)
- return 0;
+
+ tmp = bfd_realloc (table->files, amt);
+ if (tmp == NULL)
+ {
+ free (table->files);
+ free (table->dirs);
+ return NULL;
+ }
+ table->files = tmp;
}
table->files[table->num_files].name = cur_file;
unsigned int line = 1;
unsigned int column = 0;
int is_stmt = lh.default_is_stmt;
- int basic_block = 0;
int end_sequence = 0;
/* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some
compilers generate address sequences that are wildly out of
order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler
for ia64-Linux). Thus, to determine the low and high
address, we must compare on every DW_LNS_copy, etc. */
- bfd_vma low_pc = 0;
+ bfd_vma low_pc = (bfd_vma) -1;
bfd_vma high_pc = 0;
/* Decode the table. */
line += lh.line_base + (adj_opcode % lh.line_range);
/* Append row to matrix using current values. */
add_line_info (table, address, filename, line, column, 0);
- basic_block = 1;
- if (low_pc == 0 || address < low_pc)
+ if (address < low_pc)
low_pc = address;
if (address > high_pc)
high_pc = address;
end_sequence = 1;
add_line_info (table, address, filename, line, column,
end_sequence);
- if (low_pc == 0 || address < low_pc)
+ if (address < low_pc)
low_pc = address;
if (address > high_pc)
high_pc = address;
- arange_add (unit, low_pc, high_pc);
+ arange_add (unit->abfd, &unit->arange, low_pc, high_pc);
break;
case DW_LNE_set_address:
address = read_address (unit, line_ptr);
line_ptr += bytes_read;
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
+ struct fileinfo *tmp;
+
amt = table->num_files + FILE_ALLOC_CHUNK;
amt *= sizeof (struct fileinfo);
- table->files = bfd_realloc (table->files, amt);
- if (! table->files)
- return 0;
+ tmp = bfd_realloc (table->files, amt);
+ if (tmp == NULL)
+ {
+ free (table->files);
+ free (table->dirs);
+ free (filename);
+ return NULL;
+ }
+ table->files = tmp;
}
table->files[table->num_files].name = cur_file;
table->files[table->num_files].dir =
default:
(*_bfd_error_handler) (_("Dwarf Error: mangled line number section."));
bfd_set_error (bfd_error_bad_value);
- return 0;
+ free (filename);
+ free (table->files);
+ free (table->dirs);
+ return NULL;
}
break;
case DW_LNS_copy:
add_line_info (table, address, filename, line, column, 0);
- basic_block = 0;
- if (low_pc == 0 || address < low_pc)
+ if (address < low_pc)
low_pc = address;
if (address > high_pc)
high_pc = address;
is_stmt = (!is_stmt);
break;
case DW_LNS_set_basic_block:
- basic_block = 1;
break;
case DW_LNS_const_add_pc:
address += lh.minimum_instruction_length
to return as good as results as possible for strange debugging
info. */
bfd_boolean addr_match = FALSE;
- if (each_line->address <= addr && addr <= next_line->address)
+ if (each_line->address <= addr && addr < next_line->address)
{
addr_match = TRUE;
later function, return the first line of that function instead
of the last line of the earlier one. This check is for GCC
2.95, which emits the first line number for a function late. */
- if (function != NULL
- && each_line->address < function->low
- && next_line->address > function->low)
+
+ if (function != NULL)
{
- *filename_ptr = next_line->filename;
- *linenumber_ptr = next_line->line;
+ bfd_vma lowest_pc;
+ struct arange *arange;
+
+ /* Find the lowest address in the function's range list */
+ lowest_pc = function->arange.low;
+ for (arange = &function->arange;
+ arange;
+ arange = arange->next)
+ {
+ if (function->arange.low < lowest_pc)
+ lowest_pc = function->arange.low;
+ }
+ /* Check for spanning function and set outgoing line info */
+ if (addr >= lowest_pc
+ && each_line->address < lowest_pc
+ && next_line->address > lowest_pc)
+ {
+ *filename_ptr = next_line->filename;
+ *linenumber_ptr = next_line->line;
+ }
+ else
+ {
+ *filename_ptr = each_line->filename;
+ *linenumber_ptr = each_line->line;
+ }
}
else
{
return FALSE;
}
+/* Read in the .debug_ranges section for future reference */
+
+static bfd_boolean
+read_debug_ranges (struct comp_unit *unit)
+{
+ struct dwarf2_debug *stash = unit->stash;
+ return read_section (unit->abfd, ".debug_ranges", ".zdebug_ranges",
+ stash->syms, 0,
+ &stash->dwarf_ranges_buffer, &stash->dwarf_ranges_size);
+}
+
/* 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.
+ Note that we need to find the function that has the smallest
+ range that contains ADDR, to handle inlined functions without
+ depending upon them being ordered in TABLE by increasing range. */
static bfd_boolean
-lookup_address_in_function_table (struct funcinfo *table,
+lookup_address_in_function_table (struct comp_unit *unit,
bfd_vma addr,
struct funcinfo **function_ptr,
const char **functionname_ptr)
{
struct funcinfo* each_func;
+ struct funcinfo* best_fit = NULL;
+ struct arange *arange;
- for (each_func = table;
+ for (each_func = unit->function_table;
each_func;
each_func = each_func->prev_func)
{
- if (addr >= each_func->low && addr < each_func->high)
+ for (arange = &each_func->arange;
+ arange;
+ arange = arange->next)
{
- *functionname_ptr = each_func->name;
- *function_ptr = each_func;
- return TRUE;
+ if (addr >= arange->low && addr < arange->high)
+ {
+ if (!best_fit ||
+ ((arange->high - arange->low) < (best_fit->arange.high - best_fit->arange.low)))
+ best_fit = each_func;
+ }
}
}
- return FALSE;
+ if (best_fit)
+ {
+ *functionname_ptr = best_fit->name;
+ *function_ptr = best_fit;
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+
+/* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR
+ and LINENUMBER_PTR, and return TRUE. */
+
+static bfd_boolean
+lookup_symbol_in_function_table (struct comp_unit *unit,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr)
+{
+ struct funcinfo* each_func;
+ struct funcinfo* best_fit = NULL;
+ struct arange *arange;
+ const char *name = bfd_asymbol_name (sym);
+ asection *sec = bfd_get_section (sym);
+
+ for (each_func = unit->function_table;
+ each_func;
+ each_func = each_func->prev_func)
+ {
+ for (arange = &each_func->arange;
+ arange;
+ arange = arange->next)
+ {
+ if ((!each_func->sec || each_func->sec == sec)
+ && addr >= arange->low
+ && addr < arange->high
+ && each_func->name
+ && strcmp (name, each_func->name) == 0
+ && (!best_fit
+ || ((arange->high - arange->low)
+ < (best_fit->arange.high - best_fit->arange.low))))
+ best_fit = each_func;
+ }
+ }
+
+ if (best_fit)
+ {
+ best_fit->sec = sec;
+ *filename_ptr = best_fit->file;
+ *linenumber_ptr = best_fit->line;
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/* Variable table functions. */
+
+/* If SYM is within variable table of UNIT, set FILENAME_PTR and
+ LINENUMBER_PTR, and return TRUE. */
+
+static bfd_boolean
+lookup_symbol_in_variable_table (struct comp_unit *unit,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr)
+{
+ const char *name = bfd_asymbol_name (sym);
+ asection *sec = bfd_get_section (sym);
+ struct varinfo* each;
+
+ for (each = unit->variable_table; each; each = each->prev_var)
+ if (each->stack == 0
+ && each->file != NULL
+ && each->name != NULL
+ && each->addr == addr
+ && (!each->sec || each->sec == sec)
+ && strcmp (name, each->name) == 0)
+ break;
+
+ if (each)
+ {
+ each->sec = sec;
+ *filename_ptr = each->file;
+ *linenumber_ptr = each->line;
+ return TRUE;
+ }
+ else
+ return FALSE;
}
static char *
-find_abstract_instance_name (struct comp_unit *unit, bfd_uint64_t die_ref)
+find_abstract_instance_name (struct comp_unit *unit,
+ struct attribute *attr_ptr)
{
bfd *abfd = unit->abfd;
bfd_byte *info_ptr;
unsigned int abbrev_number, bytes_read, i;
struct abbrev_info *abbrev;
+ bfd_uint64_t die_ref = attr_ptr->u.val;
struct attribute attr;
char *name = 0;
- info_ptr = unit->info_ptr_unit + die_ref;
+ /* DW_FORM_ref_addr can reference an entry in a different CU. It
+ is an offset from the .debug_info section, not the current CU. */
+ if (attr_ptr->form == DW_FORM_ref_addr)
+ {
+ /* We only support DW_FORM_ref_addr within the same file, so
+ any relocations should be resolved already. */
+ if (!die_ref)
+ abort ();
+
+ info_ptr = unit->stash->sec_info_ptr + die_ref;
+ }
+ else
+ info_ptr = unit->info_ptr_unit + die_ref;
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
}
else
{
- for (i = 0; i < abbrev->num_attrs && !name; ++i)
+ for (i = 0; i < abbrev->num_attrs; ++i)
{
info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr);
switch (attr.name)
{
case DW_AT_name:
- name = attr.u.str;
+ /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
+ if (name == NULL)
+ name = attr.u.str;
break;
case DW_AT_specification:
- name = find_abstract_instance_name (unit, attr.u.val);
+ name = find_abstract_instance_name (unit, &attr);
+ break;
+ case DW_AT_MIPS_linkage_name:
+ name = attr.u.str;
break;
default:
break;
return (name);
}
+static void
+read_rangelist (struct comp_unit *unit, struct arange *arange, bfd_uint64_t offset)
+{
+ bfd_byte *ranges_ptr;
+ bfd_vma base_address = unit->base_address;
+
+ if (! unit->stash->dwarf_ranges_buffer)
+ {
+ if (! read_debug_ranges (unit))
+ return;
+ }
+ ranges_ptr = unit->stash->dwarf_ranges_buffer + offset;
+
+ for (;;)
+ {
+ bfd_vma low_pc;
+ bfd_vma high_pc;
+
+ low_pc = read_address (unit, ranges_ptr);
+ ranges_ptr += unit->addr_size;
+ high_pc = read_address (unit, ranges_ptr);
+ ranges_ptr += unit->addr_size;
+
+ if (low_pc == 0 && high_pc == 0)
+ break;
+ if (low_pc == -1UL && high_pc != -1UL)
+ base_address = high_pc;
+ else
+ arange_add (unit->abfd, arange, base_address + low_pc, base_address + high_pc);
+ }
+}
+
/* DWARF2 Compilation unit functions. */
/* Scan over each die in a comp. unit looking for functions to add
- to the function table. */
+ to the function table and variables to the variable table. */
static bfd_boolean
-scan_unit_for_functions (struct comp_unit *unit)
+scan_unit_for_symbols (struct comp_unit *unit)
{
bfd *abfd = unit->abfd;
bfd_byte *info_ptr = unit->first_child_die_ptr;
int nesting_level = 1;
+ struct funcinfo **nested_funcs;
+ int nested_funcs_size;
+
+ /* Maintain a stack of in-scope functions and inlined functions, which we
+ can use to set the caller_func field. */
+ nested_funcs_size = 32;
+ nested_funcs = bfd_malloc (nested_funcs_size * sizeof (struct funcinfo *));
+ if (nested_funcs == NULL)
+ return FALSE;
+ nested_funcs[nesting_level] = 0;
while (nesting_level)
{
struct abbrev_info *abbrev;
struct attribute attr;
struct funcinfo *func;
- char *name = 0;
+ struct varinfo *var;
+ bfd_vma low_pc = 0;
+ bfd_vma high_pc = 0;
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
(*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."),
abbrev_number);
bfd_set_error (bfd_error_bad_value);
+ free (nested_funcs);
return FALSE;
}
+ var = NULL;
if (abbrev->tag == DW_TAG_subprogram
+ || abbrev->tag == DW_TAG_entry_point
|| abbrev->tag == DW_TAG_inlined_subroutine)
{
bfd_size_type amt = sizeof (struct funcinfo);
func = bfd_zalloc (abfd, amt);
+ func->tag = abbrev->tag;
func->prev_func = unit->function_table;
unit->function_table = func;
+ BFD_ASSERT (!unit->cached);
+
+ if (func->tag == DW_TAG_inlined_subroutine)
+ for (i = nesting_level - 1; i >= 1; i--)
+ if (nested_funcs[i])
+ {
+ func->caller_func = nested_funcs[i];
+ break;
+ }
+ nested_funcs[nesting_level] = func;
}
else
- func = NULL;
+ {
+ func = NULL;
+ if (abbrev->tag == DW_TAG_variable)
+ {
+ bfd_size_type amt = sizeof (struct varinfo);
+ var = bfd_zalloc (abfd, amt);
+ var->tag = abbrev->tag;
+ var->stack = 1;
+ var->prev_var = unit->variable_table;
+ unit->variable_table = var;
+ BFD_ASSERT (!unit->cached);
+ }
+
+ /* No inline function in scope at this nesting level. */
+ nested_funcs[nesting_level] = 0;
+ }
for (i = 0; i < abbrev->num_attrs; ++i)
{
{
switch (attr.name)
{
- case DW_AT_abstract_origin:
- func->name = find_abstract_instance_name (unit, attr.u.val);
+ case DW_AT_call_file:
+ func->caller_file = concat_filename (unit->line_table, attr.u.val);
break;
- case DW_AT_name:
+ case DW_AT_call_line:
+ func->caller_line = attr.u.val;
+ break;
- name = attr.u.str;
+ case DW_AT_abstract_origin:
+ func->name = find_abstract_instance_name (unit, &attr);
+ break;
+ case DW_AT_name:
/* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
if (func->name == NULL)
func->name = attr.u.str;
break;
case DW_AT_low_pc:
- func->low = attr.u.val;
+ low_pc = attr.u.val;
break;
case DW_AT_high_pc:
- func->high = attr.u.val;
+ high_pc = attr.u.val;
+ break;
+
+ case DW_AT_ranges:
+ read_rangelist (unit, &func->arange, attr.u.val);
+ break;
+
+ case DW_AT_decl_file:
+ func->file = concat_filename (unit->line_table,
+ attr.u.val);
+ break;
+
+ case DW_AT_decl_line:
+ func->line = attr.u.val;
break;
default:
break;
}
}
- else
+ else if (var)
{
switch (attr.name)
{
case DW_AT_name:
- name = attr.u.str;
+ var->name = attr.u.str;
+ break;
+
+ case DW_AT_decl_file:
+ var->file = concat_filename (unit->line_table,
+ attr.u.val);
+ break;
+
+ case DW_AT_decl_line:
+ var->line = attr.u.val;
+ break;
+
+ case DW_AT_external:
+ if (attr.u.val != 0)
+ var->stack = 0;
+ break;
+
+ case DW_AT_location:
+ switch (attr.form)
+ {
+ case DW_FORM_block:
+ case DW_FORM_block1:
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ if (*attr.u.blk->data == DW_OP_addr)
+ {
+ var->stack = 0;
+
+ /* Verify that DW_OP_addr is the only opcode in the
+ location, in which case the block size will be 1
+ plus the address size. */
+ /* ??? For TLS variables, gcc can emit
+ DW_OP_addr <addr> DW_OP_GNU_push_tls_address
+ which we don't handle here yet. */
+ if (attr.u.blk->size == unit->addr_size + 1U)
+ var->addr = bfd_get (unit->addr_size * 8,
+ unit->abfd,
+ attr.u.blk->data + 1);
+ }
+ break;
+
+ default:
+ break;
+ }
break;
default:
}
}
+ if (func && high_pc != 0)
+ {
+ arange_add (unit->abfd, &func->arange, low_pc, high_pc);
+ }
+
if (abbrev->has_children)
- nesting_level++;
+ {
+ nesting_level++;
+
+ if (nesting_level >= nested_funcs_size)
+ {
+ struct funcinfo **tmp;
+
+ nested_funcs_size *= 2;
+ tmp = bfd_realloc (nested_funcs,
+ (nested_funcs_size
+ * sizeof (struct funcinfo *)));
+ if (tmp == NULL)
+ {
+ free (nested_funcs);
+ return FALSE;
+ }
+ nested_funcs = tmp;
+ }
+ nested_funcs[nesting_level] = 0;
+ }
}
+ free (nested_funcs);
return TRUE;
}
to get to the line number information for the compilation unit. */
static struct comp_unit *
-parse_comp_unit (bfd *abfd,
- struct dwarf2_debug *stash,
+parse_comp_unit (struct dwarf2_debug *stash,
bfd_vma unit_length,
bfd_byte *info_ptr_unit,
unsigned int offset_size)
bfd_byte *info_ptr = stash->info_ptr;
bfd_byte *end_ptr = info_ptr + unit_length;
bfd_size_type amt;
+ bfd_vma low_pc = 0;
+ bfd_vma high_pc = 0;
+ bfd *abfd = stash->bfd;
version = read_2_bytes (abfd, info_ptr);
info_ptr += 2;
addr_size = read_1_byte (abfd, info_ptr);
info_ptr += 1;
- if (version != 2)
+ if (version != 2 && version != 3)
{
- (*_bfd_error_handler) (_("Dwarf Error: found dwarf version '%u', this reader only handles version 2 information."), version);
+ (*_bfd_error_handler) (_("Dwarf Error: found dwarf version '%u', this reader only handles version 2 and 3 information."), version);
bfd_set_error (bfd_error_bad_value);
return 0;
}
amt = sizeof (struct comp_unit);
unit = bfd_zalloc (abfd, amt);
unit->abfd = abfd;
+ unit->version = version;
unit->addr_size = addr_size;
unit->offset_size = offset_size;
unit->abbrevs = abbrevs;
break;
case DW_AT_low_pc:
- unit->arange.low = attr.u.val;
+ low_pc = attr.u.val;
+ /* If the compilation unit DIE has a DW_AT_low_pc attribute,
+ this is the base address to use when reading location
+ lists or range lists. */
+ unit->base_address = low_pc;
break;
case DW_AT_high_pc:
- unit->arange.high = attr.u.val;
+ high_pc = attr.u.val;
+ break;
+
+ case DW_AT_ranges:
+ read_rangelist (unit, &unit->arange, attr.u.val);
break;
case DW_AT_comp_dir:
break;
}
}
+ if (high_pc != 0)
+ {
+ arange_add (unit->abfd, &unit->arange, low_pc, high_pc);
+ }
unit->first_child_die_ptr = info_ptr;
return unit;
}
-/* Return TRUE if UNIT contains the address given by ADDR. */
+/* Return TRUE if UNIT may contain the address given by ADDR. When
+ there are functions written entirely with inline asm statements, the
+ range info in the compilation unit header may not be correct. We
+ need to consult the line info table to see if a compilation unit
+ really contains the given address. */
static bfd_boolean
comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr)
}
if (unit->first_child_die_ptr < unit->end_ptr
- && ! scan_unit_for_functions (unit))
+ && ! scan_unit_for_symbols (unit))
{
unit->error = 1;
return FALSE;
}
function = NULL;
- func_p = lookup_address_in_function_table (unit->function_table, addr,
+ func_p = lookup_address_in_function_table (unit, addr,
&function, functionname_ptr);
+ if (func_p && (function->tag == DW_TAG_inlined_subroutine))
+ stash->inliner_chain = function;
line_p = lookup_address_in_line_info_table (unit->line_table, addr,
function, filename_ptr,
linenumber_ptr);
return line_p || func_p;
}
+/* Check to see if line info is already decoded in a comp_unit.
+ If not, decode it. Returns TRUE if no errors were encountered;
+ FALSE otherwise. */
+
+static bfd_boolean
+comp_unit_maybe_decode_line_info (struct comp_unit *unit,
+ struct dwarf2_debug *stash)
+{
+ if (unit->error)
+ return FALSE;
+
+ if (! unit->line_table)
+ {
+ if (! unit->stmtlist)
+ {
+ unit->error = 1;
+ return FALSE;
+ }
+
+ unit->line_table = decode_line_info (unit, stash);
+
+ if (! unit->line_table)
+ {
+ unit->error = 1;
+ return FALSE;
+ }
+
+ if (unit->first_child_die_ptr < unit->end_ptr
+ && ! scan_unit_for_symbols (unit))
+ {
+ unit->error = 1;
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* If UNIT contains SYM at ADDR, set the output parameters to the
+ values for the line containing SYM. The output parameters,
+ FILENAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be
+ filled in.
+
+ Return TRUE if UNIT contains SYM, and no errors were encountered;
+ FALSE otherwise. */
+
+static bfd_boolean
+comp_unit_find_line (struct comp_unit *unit,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr,
+ struct dwarf2_debug *stash)
+{
+ if (!comp_unit_maybe_decode_line_info (unit, stash))
+ return FALSE;
+
+ if (sym->flags & BSF_FUNCTION)
+ return lookup_symbol_in_function_table (unit, sym, addr,
+ filename_ptr,
+ linenumber_ptr);
+
+ return lookup_symbol_in_variable_table (unit, sym, addr,
+ filename_ptr,
+ linenumber_ptr);
+}
+
+static struct funcinfo *
+reverse_funcinfo_list (struct funcinfo *head)
+{
+ struct funcinfo *rhead;
+ struct funcinfo *temp;
+
+ for (rhead = NULL; head; head = temp)
+ {
+ temp = head->prev_func;
+ head->prev_func = rhead;
+ rhead = head;
+ }
+ return rhead;
+}
+
+static struct varinfo *
+reverse_varinfo_list (struct varinfo *head)
+{
+ struct varinfo *rhead;
+ struct varinfo *temp;
+
+ for (rhead = NULL; head; head = temp)
+ {
+ temp = head->prev_var;
+ head->prev_var = rhead;
+ rhead = head;
+ }
+ return rhead;
+}
+
+/* Extract all interesting funcinfos and varinfos of a compilation
+ unit into hash tables for faster lookup. Returns TRUE if no
+ errors were enountered; FALSE otherwise. */
+
+static bfd_boolean
+comp_unit_hash_info (struct dwarf2_debug *stash,
+ struct comp_unit *unit,
+ struct info_hash_table *funcinfo_hash_table,
+ struct info_hash_table *varinfo_hash_table)
+{
+ struct funcinfo* each_func;
+ struct varinfo* each_var;
+ bfd_boolean okay = TRUE;
+
+ BFD_ASSERT (stash->info_hash_status != STASH_INFO_HASH_DISABLED);
+
+ if (!comp_unit_maybe_decode_line_info (unit, stash))
+ return FALSE;
+
+ BFD_ASSERT (!unit->cached);
+
+ /* To preserve the original search order, we went to visit the function
+ infos in the reversed order of the list. However, making the list
+ bi-directional use quite a bit of extra memory. So we reverse
+ the list first, traverse the list in the now reversed order and
+ finally reverse the list again to get back the original order. */
+ unit->function_table = reverse_funcinfo_list (unit->function_table);
+ for (each_func = unit->function_table;
+ each_func && okay;
+ each_func = each_func->prev_func)
+ {
+ /* Skip nameless functions. */
+ if (each_func->name)
+ /* There is no need to copy name string into hash table as
+ name string is either in the dwarf string buffer or
+ info in the stash. */
+ okay = insert_info_hash_table (funcinfo_hash_table, each_func->name,
+ (void*) each_func, FALSE);
+ }
+ unit->function_table = reverse_funcinfo_list (unit->function_table);
+ if (!okay)
+ return FALSE;
+
+ /* We do the same for variable infos. */
+ unit->variable_table = reverse_varinfo_list (unit->variable_table);
+ for (each_var = unit->variable_table;
+ each_var && okay;
+ each_var = each_var->prev_var)
+ {
+ /* Skip stack vars and vars with no files or names. */
+ if (each_var->stack == 0
+ && each_var->file != NULL
+ && each_var->name != NULL)
+ /* There is no need to copy name string into hash table as
+ name string is either in the dwarf string buffer or
+ info in the stash. */
+ okay = insert_info_hash_table (varinfo_hash_table, each_var->name,
+ (void*) each_var, FALSE);
+ }
+
+ unit->variable_table = reverse_varinfo_list (unit->variable_table);
+ unit->cached = TRUE;
+ return okay;
+}
+
/* Locate a section in a BFD containing debugging info. The search starts
from the section after AFTER_SEC, or from the first section in the BFD if
AFTER_SEC is NULL. The search works by examining the names of the
identify and discard duplicate debugging sections for different
compilation units. */
#define DWARF2_DEBUG_INFO ".debug_info"
+#define DWARF2_COMPRESSED_DEBUG_INFO ".zdebug_info"
#define GNU_LINKONCE_INFO ".gnu.linkonce.wi."
static asection *
{
asection * msec;
- if (after_sec)
- msec = after_sec->next;
- else
- msec = abfd->sections;
+ msec = after_sec != NULL ? after_sec->next : abfd->sections;
while (msec)
{
if (strcmp (msec->name, DWARF2_DEBUG_INFO) == 0)
return msec;
- if (strncmp (msec->name, GNU_LINKONCE_INFO, strlen (GNU_LINKONCE_INFO)) == 0)
+ if (strcmp (msec->name, DWARF2_COMPRESSED_DEBUG_INFO) == 0)
+ return msec;
+
+ if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO))
return msec;
msec = msec->next;
return NULL;
}
-/* 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. */
+/* Unset vmas for adjusted sections in STASH. */
-bfd_boolean
-_bfd_dwarf2_find_nearest_line (bfd *abfd,
- asection *section,
- asymbol **symbols,
- bfd_vma offset,
- const char **filename_ptr,
- const char **functionname_ptr,
- unsigned int *linenumber_ptr,
- unsigned int addr_size,
- void **pinfo)
+static void
+unset_sections (struct dwarf2_debug *stash)
{
- /* Read each compilation unit from the section .debug_info, and check
- to see if it contains the address we are searching for. If yes,
- lookup the address, and return the line number info. If no, go
- on to the next compilation unit.
+ unsigned int i;
+ struct adjusted_section *p;
- We keep a list of all the previously read compilation units, and
- a pointer to the next un-read compilation unit. Check the
- previously read units before reading more. */
- struct dwarf2_debug *stash;
+ i = stash->adjusted_section_count;
+ p = stash->adjusted_sections;
+ for (; i > 0; i--, p++)
+ p->section->vma = 0;
+}
- /* What address are we looking for? */
- bfd_vma addr;
+/* Set unique VMAs for loadable and DWARF sections in ABFD and save
+ VMAs in STASH for unset_sections. */
- struct comp_unit* each;
+static bfd_boolean
+place_sections (bfd *abfd, struct dwarf2_debug *stash)
+{
+ struct adjusted_section *p;
+ unsigned int i;
- stash = *pinfo;
- addr = offset;
- if (section->output_section)
- addr += section->output_section->vma + section->output_offset;
+ if (stash->adjusted_section_count != 0)
+ {
+ i = stash->adjusted_section_count;
+ p = stash->adjusted_sections;
+ for (; i > 0; i--, p++)
+ p->section->vma = p->adj_vma;
+ }
else
- addr += section->vma;
- *filename_ptr = NULL;
- *functionname_ptr = NULL;
- *linenumber_ptr = 0;
+ {
+ asection *sect;
+ bfd_vma last_vma = 0, last_dwarf = 0;
+ bfd_size_type amt;
+ struct adjusted_section *p;
- /* The DWARF2 spec says that the initial length field, and the
- offset of the abbreviation table, should both be 4-byte values.
- However, some compilers do things differently. */
- if (addr_size == 0)
- addr_size = 4;
- BFD_ASSERT (addr_size == 4 || addr_size == 8);
+ i = 0;
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ {
+ bfd_size_type sz;
+ int is_debug_info;
+
+ if (sect->vma != 0)
+ continue;
+
+ /* We need to adjust the VMAs of any .debug_info sections.
+ Skip compressed ones, since no relocations could target
+ them - they should not appear in object files anyway. */
+ if (strcmp (sect->name, DWARF2_DEBUG_INFO) == 0)
+ is_debug_info = 1;
+ else if (CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO))
+ is_debug_info = 1;
+ else
+ is_debug_info = 0;
+
+ if (!is_debug_info && (sect->flags & SEC_LOAD) == 0)
+ continue;
+
+ sz = sect->rawsize ? sect->rawsize : sect->size;
+ if (sz == 0)
+ continue;
+
+ i++;
+ }
+
+ amt = i * sizeof (struct adjusted_section);
+ p = (struct adjusted_section *) bfd_zalloc (abfd, amt);
+ if (! p)
+ return FALSE;
+
+ stash->adjusted_sections = p;
+ stash->adjusted_section_count = i;
+
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ {
+ bfd_size_type sz;
+ int is_debug_info;
+
+ if (sect->vma != 0)
+ continue;
+
+ /* We need to adjust the VMAs of any .debug_info sections.
+ Skip compressed ones, since no relocations could target
+ them - they should not appear in object files anyway. */
+ if (strcmp (sect->name, DWARF2_DEBUG_INFO) == 0)
+ is_debug_info = 1;
+ else if (CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO))
+ is_debug_info = 1;
+ else
+ is_debug_info = 0;
+
+ if (!is_debug_info && (sect->flags & SEC_LOAD) == 0)
+ continue;
+
+ sz = sect->rawsize ? sect->rawsize : sect->size;
+ if (sz == 0)
+ continue;
+
+ p->section = sect;
+ if (is_debug_info)
+ {
+ BFD_ASSERT (sect->alignment_power == 0);
+ sect->vma = last_dwarf;
+ last_dwarf += sz;
+ }
+ else if (last_vma != 0)
+ {
+ /* Align the new address to the current section
+ alignment. */
+ last_vma = ((last_vma
+ + ~((bfd_vma) -1 << sect->alignment_power))
+ & ((bfd_vma) -1 << sect->alignment_power));
+ sect->vma = last_vma;
+ last_vma += sect->vma + sz;
+ }
+ else
+ last_vma += sect->vma + sz;
+
+ p->adj_vma = sect->vma;
+
+ p++;
+ }
+ }
+
+ return TRUE;
+}
+
+/* Look up a funcinfo by name using the given info hash table. If found,
+ also update the locations pointed to by filename_ptr and linenumber_ptr.
+
+ This function returns TRUE if a funcinfo that matches the given symbol
+ and address is found with any error; otherwise it returns FALSE. */
+
+static bfd_boolean
+info_hash_lookup_funcinfo (struct info_hash_table *hash_table,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr)
+{
+ struct funcinfo* each_func;
+ struct funcinfo* best_fit = NULL;
+ struct info_list_node *node;
+ struct arange *arange;
+ const char *name = bfd_asymbol_name (sym);
+ asection *sec = bfd_get_section (sym);
+
+ for (node = lookup_info_hash_table (hash_table, name);
+ node;
+ node = node->next)
+ {
+ each_func = node->info;
+ for (arange = &each_func->arange;
+ arange;
+ arange = arange->next)
+ {
+ if ((!each_func->sec || each_func->sec == sec)
+ && addr >= arange->low
+ && addr < arange->high
+ && (!best_fit
+ || ((arange->high - arange->low)
+ < (best_fit->arange.high - best_fit->arange.low))))
+ best_fit = each_func;
+ }
+ }
+
+ if (best_fit)
+ {
+ best_fit->sec = sec;
+ *filename_ptr = best_fit->file;
+ *linenumber_ptr = best_fit->line;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/* Look up a varinfo by name using the given info hash table. If found,
+ also update the locations pointed to by filename_ptr and linenumber_ptr.
+
+ This function returns TRUE if a varinfo that matches the given symbol
+ and address is found with any error; otherwise it returns FALSE. */
+
+static bfd_boolean
+info_hash_lookup_varinfo (struct info_hash_table *hash_table,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr)
+{
+ const char *name = bfd_asymbol_name (sym);
+ asection *sec = bfd_get_section (sym);
+ struct varinfo* each;
+ struct info_list_node *node;
+
+ for (node = lookup_info_hash_table (hash_table, name);
+ node;
+ node = node->next)
+ {
+ each = node->info;
+ if (each->addr == addr
+ && (!each->sec || each->sec == sec))
+ {
+ each->sec = sec;
+ *filename_ptr = each->file;
+ *linenumber_ptr = each->line;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+/* Update the funcinfo and varinfo info hash tables if they are
+ not up to date. Returns TRUE if there is no error; otherwise
+ returns FALSE and disable the info hash tables. */
+
+static bfd_boolean
+stash_maybe_update_info_hash_tables (struct dwarf2_debug *stash)
+{
+ struct comp_unit *each;
+
+ /* Exit if hash tables are up-to-date. */
+ if (stash->all_comp_units == stash->hash_units_head)
+ return TRUE;
+
+ if (stash->hash_units_head)
+ each = stash->hash_units_head->prev_unit;
+ else
+ each = stash->last_comp_unit;
+
+ while (each)
+ {
+ if (!comp_unit_hash_info (stash, each, stash->funcinfo_hash_table,
+ stash->varinfo_hash_table))
+ {
+ stash->info_hash_status = STASH_INFO_HASH_DISABLED;
+ return FALSE;
+ }
+ each = each->prev_unit;
+ }
+
+ stash->hash_units_head = stash->all_comp_units;
+ return TRUE;
+}
+
+/* Check consistency of info hash tables. This is for debugging only. */
+
+static void ATTRIBUTE_UNUSED
+stash_verify_info_hash_table (struct dwarf2_debug *stash)
+{
+ struct comp_unit *each_unit;
+ struct funcinfo *each_func;
+ struct varinfo *each_var;
+ struct info_list_node *node;
+ bfd_boolean found;
+
+ for (each_unit = stash->all_comp_units;
+ each_unit;
+ each_unit = each_unit->next_unit)
+ {
+ for (each_func = each_unit->function_table;
+ each_func;
+ each_func = each_func->prev_func)
+ {
+ if (!each_func->name)
+ continue;
+ node = lookup_info_hash_table (stash->funcinfo_hash_table,
+ each_func->name);
+ BFD_ASSERT (node);
+ found = FALSE;
+ while (node && !found)
+ {
+ found = node->info == each_func;
+ node = node->next;
+ }
+ BFD_ASSERT (found);
+ }
+
+ for (each_var = each_unit->variable_table;
+ each_var;
+ each_var = each_var->prev_var)
+ {
+ if (!each_var->name || !each_var->file || each_var->stack)
+ continue;
+ node = lookup_info_hash_table (stash->varinfo_hash_table,
+ each_var->name);
+ BFD_ASSERT (node);
+ found = FALSE;
+ while (node && !found)
+ {
+ found = node->info == each_var;
+ node = node->next;
+ }
+ BFD_ASSERT (found);
+ }
+ }
+}
+
+/* Check to see if we want to enable the info hash tables, which consume
+ quite a bit of memory. Currently we only check the number times
+ bfd_dwarf2_find_line is called. In the future, we may also want to
+ take the number of symbols into account. */
+
+static void
+stash_maybe_enable_info_hash_tables (bfd *abfd, struct dwarf2_debug *stash)
+{
+ BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_OFF);
+
+ if (stash->info_hash_count++ < STASH_INFO_HASH_TRIGGER)
+ return;
+
+ /* FIXME: Maybe we should check the reduce_memory_overheads
+ and optimize fields in the bfd_link_info structure ? */
+
+ /* Create hash tables. */
+ stash->funcinfo_hash_table = create_info_hash_table (abfd);
+ stash->varinfo_hash_table = create_info_hash_table (abfd);
+ if (!stash->funcinfo_hash_table || !stash->varinfo_hash_table)
+ {
+ /* Turn off info hashes if any allocation above fails. */
+ stash->info_hash_status = STASH_INFO_HASH_DISABLED;
+ return;
+ }
+ /* We need a forced update so that the info hash tables will
+ be created even though there is no compilation unit. That
+ happens if STASH_INFO_HASH_TRIGGER is 0. */
+ stash_maybe_update_info_hash_tables (stash);
+ stash->info_hash_status = STASH_INFO_HASH_ON;
+}
+
+/* Find the file and line associated with a symbol and address using the
+ info hash tables of a stash. If there is a match, the function returns
+ TRUE and update the locations pointed to by filename_ptr and linenumber_ptr;
+ otherwise it returns FALSE. */
+
+static bfd_boolean
+stash_find_line_fast (struct dwarf2_debug *stash,
+ asymbol *sym,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr)
+{
+ BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_ON);
+
+ if (sym->flags & BSF_FUNCTION)
+ return info_hash_lookup_funcinfo (stash->funcinfo_hash_table, sym, addr,
+ filename_ptr, linenumber_ptr);
+ return info_hash_lookup_varinfo (stash->varinfo_hash_table, sym, addr,
+ filename_ptr, linenumber_ptr);
+}
+
+/* Find the source code location of SYMBOL. If SYMBOL is NULL
+ then find the nearest source code location corresponding to
+ the address SECTION + OFFSET.
+ Returns TRUE if the line is found without error and fills in
+ FILENAME_PTR and LINENUMBER_PTR. In the case where SYMBOL was
+ NULL the FUNCTIONNAME_PTR is also filled in.
+ SYMBOLS contains the symbol table for ABFD.
+ ADDR_SIZE is the number of bytes in the initial .debug_info length
+ field and in the abbreviation offset, or zero to indicate that the
+ default value should be used. */
+
+static bfd_boolean
+find_line (bfd *abfd,
+ asection *section,
+ bfd_vma offset,
+ asymbol *symbol,
+ asymbol **symbols,
+ const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int addr_size,
+ void **pinfo)
+{
+ /* Read each compilation unit from the section .debug_info, and check
+ to see if it contains the address we are searching for. If yes,
+ lookup the address, and return the line number info. If no, go
+ on to the next compilation unit.
+
+ We keep a list of all the previously read compilation units, and
+ a pointer to the next un-read compilation unit. Check the
+ previously read units before reading more. */
+ struct dwarf2_debug *stash;
+ /* What address are we looking for? */
+ bfd_vma addr;
+ struct comp_unit* each;
+ bfd_vma found = FALSE;
+ bfd_boolean do_line;
+
+ stash = *pinfo;
if (! stash)
{
- bfd_size_type total_size;
- asection *msec;
bfd_size_type amt = sizeof (struct dwarf2_debug);
stash = bfd_zalloc (abfd, amt);
if (! stash)
return FALSE;
+ }
+
+ /* In a relocatable file, 2 functions may have the same address.
+ We change the section vma so that they won't overlap. */
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ {
+ if (! place_sections (abfd, stash))
+ return FALSE;
+ }
+
+ do_line = (section == NULL
+ && offset == 0
+ && functionname_ptr == NULL
+ && symbol != NULL);
+ if (do_line)
+ {
+ addr = symbol->value;
+ section = bfd_get_section (symbol);
+ }
+ else if (section != NULL
+ && functionname_ptr != NULL
+ && symbol == NULL)
+ addr = offset;
+ else
+ abort ();
+
+ if (section->output_section)
+ addr += section->output_section->vma + section->output_offset;
+ else
+ addr += section->vma;
+ *filename_ptr = NULL;
+ if (! do_line)
+ *functionname_ptr = NULL;
+ *linenumber_ptr = 0;
+
+ if (! *pinfo)
+ {
+ bfd *debug_bfd;
+ bfd_size_type total_size;
+ asection *msec;
*pinfo = stash;
msec = find_debug_info (abfd, NULL);
- if (! msec)
- /* 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;
-
- /* 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
- passes - in the first pass we just accumulate the section sizes.
- In the second pass we read in the section's contents. The allows
- us to avoid reallocing the data as we add sections to the stash. */
- for (total_size = 0; msec; msec = find_debug_info (abfd, msec))
- total_size += msec->size;
-
- stash->info_ptr = bfd_alloc (abfd, total_size);
- if (stash->info_ptr == NULL)
- return FALSE;
+ if (msec == NULL)
+ {
+ char * debug_filename = bfd_follow_gnu_debuglink (abfd, DEBUGDIR);
+
+ if (debug_filename == NULL)
+ /* No dwarf2 info, and no gnu_debuglink to follow.
+ Note that at this point the stash has been allocated, but
+ contains zeros. This lets future calls to this function
+ fail more quickly. */
+ goto done;
+
+ if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
+ || ! bfd_check_format (debug_bfd, bfd_object)
+ || (msec = find_debug_info (debug_bfd, NULL)) == NULL)
+ {
+ if (debug_bfd)
+ bfd_close (debug_bfd);
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ free (debug_filename);
+ goto done;
+ }
+ }
+ else
+ debug_bfd = abfd;
+
+ /* There can be more than one DWARF2 info section in a BFD these
+ days. First handle the easy case when there's only one. If
+ there's more than one, try case two: none of the sections is
+ compressed. In that case, read them all in and produce one
+ large stash. We do this in two passes - in the first pass we
+ just accumulate the section sizes, and in the second pass we
+ read in the section's contents. (The allows us to avoid
+ reallocing the data as we add sections to the stash.) If
+ some or all sections are compressed, then do things the slow
+ way, with a bunch of reallocs. */
+
+ if (! find_debug_info (debug_bfd, msec))
+ {
+ /* Case 1: only one info section. */
+ total_size = msec->size;
+ if (! read_section (debug_bfd, ".debug_info", ".zdebug_info",
+ symbols, 0,
+ &stash->info_ptr_memory, &total_size))
+ goto done;
+ }
+ else
+ {
+ int all_uncompressed = 1;
+ for (total_size = 0; msec; msec = find_debug_info (debug_bfd, msec))
+ {
+ total_size += msec->size;
+ if (strcmp (msec->name, DWARF2_COMPRESSED_DEBUG_INFO) == 0)
+ all_uncompressed = 0;
+ }
+ if (all_uncompressed)
+ {
+ /* Case 2: multiple sections, but none is compressed. */
+ stash->info_ptr_memory = bfd_malloc (total_size);
+ if (stash->info_ptr_memory == NULL)
+ goto done;
+
+ total_size = 0;
+ for (msec = find_debug_info (debug_bfd, NULL);
+ msec;
+ msec = find_debug_info (debug_bfd, msec))
+ {
+ bfd_size_type size;
- stash->info_ptr_end = stash->info_ptr;
+ size = msec->size;
+ if (size == 0)
+ continue;
- for (msec = find_debug_info (abfd, NULL);
- msec;
- msec = find_debug_info (abfd, msec))
- {
- bfd_size_type size;
- bfd_size_type start;
+ if (!(bfd_simple_get_relocated_section_contents
+ (debug_bfd, msec, stash->info_ptr_memory + total_size,
+ symbols)))
+ goto done;
- size = msec->size;
- if (size == 0)
- continue;
+ total_size += size;
+ }
+ }
+ else
+ {
+ /* Case 3: multiple sections, some or all compressed. */
+ stash->info_ptr_memory = NULL;
+ total_size = 0;
+ for (msec = find_debug_info (debug_bfd, NULL);
+ msec;
+ msec = find_debug_info (debug_bfd, msec))
+ {
+ bfd_size_type size = msec->size;
+ bfd_byte* buffer;
- start = stash->info_ptr_end - stash->info_ptr;
+ if (size == 0)
+ continue;
- if ((bfd_simple_get_relocated_section_contents
- (abfd, msec, stash->info_ptr + start, symbols)) == NULL)
- continue;
+ buffer = (bfd_simple_get_relocated_section_contents
+ (debug_bfd, msec, NULL, symbols));
+ if (! buffer)
+ goto done;
- stash->info_ptr_end = stash->info_ptr + start + size;
+ if (strcmp (msec->name, DWARF2_COMPRESSED_DEBUG_INFO) == 0)
+ {
+ if (! bfd_uncompress_section_contents (&buffer, &size))
+ {
+ free (buffer);
+ goto done;
+ }
+ }
+ stash->info_ptr_memory = bfd_realloc (stash->info_ptr_memory,
+ total_size + size);
+ memcpy (stash->info_ptr_memory + total_size, buffer, size);
+ free (buffer);
+ total_size += size;
+ }
+ }
}
- BFD_ASSERT (stash->info_ptr_end == stash->info_ptr + total_size);
-
- stash->sec = find_debug_info (abfd, NULL);
+ stash->info_ptr = stash->info_ptr_memory;
+ stash->info_ptr_end = stash->info_ptr + total_size;
+ stash->sec = find_debug_info (debug_bfd, NULL);
stash->sec_info_ptr = stash->info_ptr;
stash->syms = symbols;
+ stash->bfd = debug_bfd;
}
/* 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;
+ goto done;
+
+ stash->inliner_chain = NULL;
/* Check the previously read comp. units first. */
- for (each = stash->all_comp_units; each; each = each->next_unit)
- if (comp_unit_contains_address (each, addr))
- return comp_unit_find_nearest_line (each, addr, filename_ptr,
- functionname_ptr, linenumber_ptr,
- stash);
+ if (do_line)
+ {
+ /* The info hash tables use quite a bit of memory. We may not want to
+ always use them. We use some heuristics to decide if and when to
+ turn it on. */
+ if (stash->info_hash_status == STASH_INFO_HASH_OFF)
+ stash_maybe_enable_info_hash_tables (abfd, stash);
+
+ /* Keep info hash table up to date if they are available. Note that we
+ may disable the hash tables if there is any error duing update. */
+ if (stash->info_hash_status == STASH_INFO_HASH_ON)
+ stash_maybe_update_info_hash_tables (stash);
+
+ if (stash->info_hash_status == STASH_INFO_HASH_ON)
+ {
+ found = stash_find_line_fast (stash, symbol, addr, filename_ptr,
+ linenumber_ptr);
+ if (found)
+ goto done;
+ }
+ else
+ {
+ /* Check the previously read comp. units first. */
+ for (each = stash->all_comp_units; each; each = each->next_unit)
+ if ((symbol->flags & BSF_FUNCTION) == 0
+ || comp_unit_contains_address (each, addr))
+ {
+ found = comp_unit_find_line (each, symbol, addr, filename_ptr,
+ linenumber_ptr, stash);
+ if (found)
+ goto done;
+ }
+ }
+ }
+ else
+ {
+ for (each = stash->all_comp_units; each; each = each->next_unit)
+ {
+ found = (comp_unit_contains_address (each, addr)
+ && comp_unit_find_nearest_line (each, addr,
+ filename_ptr,
+ functionname_ptr,
+ linenumber_ptr,
+ stash));
+ if (found)
+ goto done;
+ }
+ }
+
+ /* The DWARF2 spec says that the initial length field, and the
+ offset of the abbreviation table, should both be 4-byte values.
+ However, some compilers do things differently. */
+ if (addr_size == 0)
+ addr_size = 4;
+ BFD_ASSERT (addr_size == 4 || addr_size == 8);
/* Read each remaining comp. units checking each as they are read. */
while (stash->info_ptr < stash->info_ptr_end)
{
bfd_vma length;
- bfd_boolean found;
unsigned int offset_size = addr_size;
bfd_byte *info_ptr_unit = stash->info_ptr;
- 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. */
+ length = read_4_bytes (stash->bfd, 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)
{
offset_size = 8;
- length = read_8_bytes (abfd, stash->info_ptr + 4);
+ length = read_8_bytes (stash->bfd, stash->info_ptr + 4);
stash->info_ptr += 12;
}
/* A zero length is the IRIX way of indicating 64-bit offsets,
else if (length == 0)
{
offset_size = 8;
- length = read_4_bytes (abfd, stash->info_ptr + 4);
+ length = read_4_bytes (stash->bfd, 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. */
+ /* In the absence of the hints above, we assume 32-bit DWARF2
+ offsets even for targets with 64-bit addresses, because:
+ a) most of the time these targets will not have generated
+ more than 2Gb of debug info and so will not need 64-bit
+ offsets,
+ and
+ b) if they do use 64-bit offsets but they are not using
+ the size hints that are tested for above then they are
+ not conforming to the DWARF3 standard anyway. */
else if (addr_size == 8)
{
- length = read_8_bytes (abfd, stash->info_ptr);
- stash->info_ptr += 8;
+ offset_size = 4;
+ stash->info_ptr += 4;
}
else
stash->info_ptr += 4;
if (length > 0)
{
- each = parse_comp_unit (abfd, stash, length, info_ptr_unit,
+ each = parse_comp_unit (stash, length, info_ptr_unit,
offset_size);
+ if (!each)
+ /* The dwarf information is damaged, don't trust it any
+ more. */
+ break;
stash->info_ptr += length;
+ if (stash->all_comp_units)
+ stash->all_comp_units->prev_unit = each;
+ else
+ stash->last_comp_unit = each;
+
+ each->next_unit = stash->all_comp_units;
+ stash->all_comp_units = each;
+
+ /* DW_AT_low_pc and DW_AT_high_pc are optional for
+ compilation units. If we don't have them (i.e.,
+ unit->high == 0), we need to consult the line info table
+ to see if a compilation unit contains the given
+ address. */
+ if (do_line)
+ found = (((symbol->flags & BSF_FUNCTION) == 0
+ || each->arange.high == 0
+ || comp_unit_contains_address (each, addr))
+ && comp_unit_find_line (each, symbol, addr,
+ filename_ptr,
+ linenumber_ptr,
+ stash));
+ else
+ found = ((each->arange.high == 0
+ || comp_unit_contains_address (each, addr))
+ && comp_unit_find_nearest_line (each, addr,
+ filename_ptr,
+ functionname_ptr,
+ linenumber_ptr,
+ stash));
+
if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
== stash->sec->size)
{
- stash->sec = find_debug_info (abfd, stash->sec);
+ stash->sec = find_debug_info (stash->bfd, stash->sec);
stash->sec_info_ptr = stash->info_ptr;
}
- if (each)
+ if (found)
+ goto done;
+ }
+ }
+
+done:
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ unset_sections (stash);
+
+ return found;
+}
+
+/* The DWARF2 version of find_nearest_line.
+ Return TRUE if the line is found without error. */
+
+bfd_boolean
+_bfd_dwarf2_find_nearest_line (bfd *abfd,
+ asection *section,
+ asymbol **symbols,
+ bfd_vma offset,
+ const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int addr_size,
+ void **pinfo)
+{
+ return find_line (abfd, section, offset, NULL, symbols, filename_ptr,
+ functionname_ptr, linenumber_ptr, addr_size,
+ pinfo);
+}
+
+/* The DWARF2 version of find_line.
+ Return TRUE if the line is found without error. */
+
+bfd_boolean
+_bfd_dwarf2_find_line (bfd *abfd,
+ asymbol **symbols,
+ asymbol *symbol,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int addr_size,
+ void **pinfo)
+{
+ return find_line (abfd, NULL, 0, symbol, symbols, filename_ptr,
+ NULL, linenumber_ptr, addr_size,
+ pinfo);
+}
+
+bfd_boolean
+_bfd_dwarf2_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED,
+ const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *linenumber_ptr,
+ void **pinfo)
+{
+ struct dwarf2_debug *stash;
+
+ stash = *pinfo;
+ if (stash)
+ {
+ struct funcinfo *func = stash->inliner_chain;
+
+ if (func && func->caller_func)
+ {
+ *filename_ptr = func->caller_file;
+ *functionname_ptr = func->caller_func->name;
+ *linenumber_ptr = func->caller_line;
+ stash->inliner_chain = func->caller_func;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+void
+_bfd_dwarf2_cleanup_debug_info (bfd *abfd)
+{
+ struct comp_unit *each;
+ struct dwarf2_debug *stash;
+
+ if (abfd == NULL || elf_tdata (abfd) == NULL)
+ return;
+
+ stash = elf_tdata (abfd)->dwarf2_find_line_info;
+
+ if (stash == NULL)
+ return;
+
+ for (each = stash->all_comp_units; each; each = each->next_unit)
+ {
+ struct abbrev_info **abbrevs = each->abbrevs;
+ struct funcinfo *function_table = each->function_table;
+ struct varinfo *variable_table = each->variable_table;
+ size_t i;
+
+ for (i = 0; i < ABBREV_HASH_SIZE; i++)
+ {
+ struct abbrev_info *abbrev = abbrevs[i];
+
+ while (abbrev)
{
- each->next_unit = stash->all_comp_units;
- stash->all_comp_units = each;
-
- /* DW_AT_low_pc and DW_AT_high_pc are optional for
- compilation units. If we don't have them (i.e.,
- unit->high == 0), we need to consult the line info
- table to see if a compilation unit contains the given
- address. */
- if (each->arange.high > 0)
- {
- if (comp_unit_contains_address (each, addr))
- return comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- functionname_ptr,
- linenumber_ptr,
- stash);
- }
- else
- {
- found = comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- functionname_ptr,
- linenumber_ptr,
- stash);
- if (found)
- return TRUE;
- }
+ free (abbrev->attrs);
+ abbrev = abbrev->next;
}
}
+
+ if (each->line_table)
+ {
+ free (each->line_table->dirs);
+ free (each->line_table->files);
+ }
+
+ while (function_table)
+ {
+ if (function_table->file)
+ {
+ free (function_table->file);
+ function_table->file = NULL;
+ }
+
+ if (function_table->caller_file)
+ {
+ free (function_table->caller_file);
+ function_table->caller_file = NULL;
+ }
+ function_table = function_table->prev_func;
+ }
+
+ while (variable_table)
+ {
+ if (variable_table->file)
+ {
+ free (variable_table->file);
+ variable_table->file = NULL;
+ }
+
+ variable_table = variable_table->prev_var;
+ }
}
- return FALSE;
+ if (stash->dwarf_abbrev_buffer)
+ free (stash->dwarf_abbrev_buffer);
+ if (stash->dwarf_line_buffer)
+ free (stash->dwarf_line_buffer);
+ if (stash->dwarf_str_buffer)
+ free (stash->dwarf_str_buffer);
+ if (stash->dwarf_ranges_buffer)
+ free (stash->dwarf_ranges_buffer);
+ if (stash->info_ptr_memory)
+ free (stash->info_ptr_memory);
}
projects / deliverable / binutils-gdb.git / blobdiff