/* DWARF 2 support.
- Copyright 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1994-2016 Free Software Foundation, Inc.
Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
(gavin@cygnus.com).
based on Fred Fish's (Cygnus Support) implementation of DWARF 1
support in dwarfread.c
-This file is part of BFD.
+ This file is part of BFD.
-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
-your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or (at
+ your option) any later version.
-This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libiberty.h"
#include "libbfd.h"
#include "elf-bfd.h"
-#include "elf/dwarf2.h"
+#include "dwarf2.h"
/* The data in the .debug_line statement prologue looks like this. */
+
struct line_head
- {
- unsigned int total_length;
- unsigned short version;
- unsigned int prologue_length;
- unsigned char minimum_instruction_length;
- unsigned char default_is_stmt;
- int line_base;
- unsigned char line_range;
- unsigned char opcode_base;
- unsigned char *standard_opcode_lengths;
- };
-
-/* Attributes have a name and a value */
-struct attribute
- {
- enum dwarf_attribute name;
- enum dwarf_form form;
- union
- {
- char *str;
- struct dwarf_block *blk;
- unsigned int unsnd;
- int snd;
- bfd_vma addr;
- }
- u;
- };
+{
+ bfd_vma total_length;
+ unsigned short version;
+ bfd_vma prologue_length;
+ unsigned char minimum_instruction_length;
+ unsigned char maximum_ops_per_insn;
+ unsigned char default_is_stmt;
+ int line_base;
+ unsigned char line_range;
+ unsigned char opcode_base;
+ unsigned char *standard_opcode_lengths;
+};
-/* Get at parts of an attribute structure */
+/* Attributes have a name and a value. */
-#define DW_STRING(attr) ((attr)->u.str)
-#define DW_UNSND(attr) ((attr)->u.unsnd)
-#define DW_BLOCK(attr) ((attr)->u.blk)
-#define DW_SND(attr) ((attr)->u.snd)
-#define DW_ADDR(attr) ((attr)->u.addr)
+struct attribute
+{
+ enum dwarf_attribute name;
+ enum dwarf_form form;
+ union
+ {
+ char *str;
+ struct dwarf_block *blk;
+ bfd_uint64_t val;
+ bfd_int64_t sval;
+ }
+ u;
+};
-/* Blocks are a bunch of untyped bytes. */
+/* Blocks are a bunch of untyped bytes. */
struct dwarf_block
- {
- unsigned int size;
- char *data;
- };
+{
+ unsigned int size;
+ 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;
-struct dwarf2_debug {
+ /* Last comp unit in list above. */
+ struct comp_unit *last_comp_unit;
- /* A list of all previously read comp_units. */
- struct comp_unit* all_comp_units;
+ /* Names of the debug sections. */
+ const struct dwarf_debug_section *debug_sections;
/* 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.*/
- char* info_ptr;
+ into a buffer yet. */
+ bfd_byte *info_ptr;
+
+ /* Pointer to the end of the .debug_info section memory buffer. */
+ bfd_byte *info_ptr_end;
+
+ /* 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_ptr;
+ asection *sec;
+ bfd_byte *sec_info_ptr;
+
+ /* Support for alternate debug info sections created by the DWZ utility:
+ This includes a pointer to an alternate bfd which contains *extra*,
+ possibly duplicate debug sections, and pointers to the loaded
+ .debug_str and .debug_info sections from this bfd. */
+ bfd * alt_bfd_ptr;
+ bfd_byte * alt_dwarf_str_buffer;
+ bfd_size_type alt_dwarf_str_size;
+ bfd_byte * alt_dwarf_info_buffer;
+ bfd_size_type alt_dwarf_info_size;
+
+ /* 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;
+
+ /* Pointer to the .debug_abbrev section loaded into memory. */
+ bfd_byte *dwarf_abbrev_buffer;
+
+ /* Length of the loaded .debug_abbrev section. */
+ bfd_size_type dwarf_abbrev_size;
+
+ /* Buffer for decode_line_info. */
+ bfd_byte *dwarf_line_buffer;
+
+ /* Length of the loaded .debug_line section. */
+ bfd_size_type dwarf_line_size;
- /* Pointer to the end of the .debug_info section memory buffer. */
- char* info_ptr_end;
+ /* Pointer to the .debug_str section loaded into memory. */
+ bfd_byte *dwarf_str_buffer;
- /* Pointer to the .debug_abbrev section loaded into memory. */
- char* dwarf_abbrev_buffer;
+ /* Length of the loaded .debug_str section. */
+ bfd_size_type dwarf_str_size;
- /* Length of the loaded .debug_abbrev section. */
- unsigned long dwarf_abbrev_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;
+
+ /* Section VMAs at the time the stash was built. */
+ bfd_vma *sec_vma;
+
+ /* Number of sections whose VMA we must adjust. */
+ 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
+
+ /* True if we opened bfd_ptr. */
+ bfd_boolean close_on_cleanup;
+};
+
+struct arange
+{
+ struct arange *next;
+ bfd_vma low;
+ bfd_vma high;
};
+/* A minimal decoding of DWARF2 compilation units. We only decode
+ what's needed to get to the line number information. */
-/* VERBATUM
- The following function up to the END VERBATUM mark are
- copied directly from dwarf2read.c. */
+struct comp_unit
+{
+ /* Chain the previously read compilation units. */
+ struct comp_unit *next_unit;
-/* read dwarf information from a buffer */
+ /* Likewise, chain the compilation unit read after this one.
+ The comp units are stored in reversed reading order. */
+ struct comp_unit *prev_unit;
-static unsigned int
-read_1_byte (abfd, buf)
- bfd *abfd;
- char *buf;
+ /* Keep the bfd convenient (for memory allocation). */
+ bfd *abfd;
+
+ /* The lowest and highest addresses contained in this compilation
+ unit as specified in the compilation unit header. */
+ struct arange arange;
+
+ /* The DW_AT_name attribute (for error messages). */
+ char *name;
+
+ /* The abbrev hash table. */
+ struct abbrev_info **abbrevs;
+
+ /* DW_AT_language. */
+ int lang;
+
+ /* Note that an error was found by comp_unit_find_nearest_line. */
+ int error;
+
+ /* The DW_AT_comp_dir attribute. */
+ char *comp_dir;
+
+ /* TRUE if there is a line number table associated with this comp. unit. */
+ int stmtlist;
+
+ /* Pointer to the current comp_unit so that we can find a given entry
+ by its reference. */
+ bfd_byte *info_ptr_unit;
+
+ /* Pointer to the start of the debug section, for DW_FORM_ref_addr. */
+ bfd_byte *sec_info_ptr;
+
+ /* The offset into .debug_line of the line number table. */
+ unsigned long line_offset;
+
+ /* Pointer to the first child die for the comp unit. */
+ bfd_byte *first_child_die_ptr;
+
+ /* The end of the comp unit. */
+ bfd_byte *end_ptr;
+
+ /* The decoded line number, NULL if not yet decoded. */
+ struct line_info_table *line_table;
+
+ /* 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. */
+struct abbrev_info
+{
+ unsigned int number; /* Number identifying abbrev. */
+ enum dwarf_tag tag; /* DWARF tag. */
+ int has_children; /* Boolean. */
+ unsigned int num_attrs; /* Number of attributes. */
+ struct attr_abbrev *attrs; /* An array of attribute descriptions. */
+ struct abbrev_info *next; /* Next in chain. */
+};
+
+struct attr_abbrev
+{
+ enum dwarf_attribute name;
+ enum dwarf_form form;
+};
+
+/* Map of uncompressed DWARF debug section name to compressed one. It
+ is terminated by NULL uncompressed_name. */
+
+const struct dwarf_debug_section dwarf_debug_sections[] =
+{
+ { ".debug_abbrev", ".zdebug_abbrev" },
+ { ".debug_aranges", ".zdebug_aranges" },
+ { ".debug_frame", ".zdebug_frame" },
+ { ".debug_info", ".zdebug_info" },
+ { ".debug_info", ".zdebug_info" },
+ { ".debug_line", ".zdebug_line" },
+ { ".debug_loc", ".zdebug_loc" },
+ { ".debug_macinfo", ".zdebug_macinfo" },
+ { ".debug_macro", ".zdebug_macro" },
+ { ".debug_pubnames", ".zdebug_pubnames" },
+ { ".debug_pubtypes", ".zdebug_pubtypes" },
+ { ".debug_ranges", ".zdebug_ranges" },
+ { ".debug_static_func", ".zdebug_static_func" },
+ { ".debug_static_vars", ".zdebug_static_vars" },
+ { ".debug_str", ".zdebug_str", },
+ { ".debug_str", ".zdebug_str", },
+ { ".debug_types", ".zdebug_types" },
+ /* GNU DWARF 1 extensions */
+ { ".debug_sfnames", ".zdebug_sfnames" },
+ { ".debug_srcinfo", ".zebug_srcinfo" },
+ /* SGI/MIPS DWARF 2 extensions */
+ { ".debug_funcnames", ".zdebug_funcnames" },
+ { ".debug_typenames", ".zdebug_typenames" },
+ { ".debug_varnames", ".zdebug_varnames" },
+ { ".debug_weaknames", ".zdebug_weaknames" },
+ { NULL, NULL },
+};
+
+/* NB/ Numbers in this enum must match up with indicies
+ into the dwarf_debug_sections[] array above. */
+enum dwarf_debug_section_enum
+{
+ debug_abbrev = 0,
+ debug_aranges,
+ debug_frame,
+ debug_info,
+ debug_info_alt,
+ debug_line,
+ debug_loc,
+ debug_macinfo,
+ debug_macro,
+ debug_pubnames,
+ debug_pubtypes,
+ debug_ranges,
+ debug_static_func,
+ debug_static_vars,
+ debug_str,
+ debug_str_alt,
+ debug_types,
+ debug_sfnames,
+ debug_srcinfo,
+ debug_funcnames,
+ debug_typenames,
+ debug_varnames,
+ debug_weaknames
+};
+
+#ifndef ABBREV_HASH_SIZE
+#define ABBREV_HASH_SIZE 121
+#endif
+#ifndef ATTR_ALLOC_CHUNK
+#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)
{
- return bfd_get_8 (abfd, (bfd_byte *) buf);
+ 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 = (struct info_hash_entry *) 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;
}
-static int
-read_1_signed_byte (abfd, buf)
- bfd *abfd;
- char *buf;
+/* 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)
{
- return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
+ struct info_hash_table *hash_table;
+
+ hash_table = ((struct info_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;
}
-static unsigned int
-read_2_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+/* 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)
{
- return bfd_get_16 (abfd, (bfd_byte *) buf);
+ 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 = (struct info_list_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;
}
-#if 0
+/* 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;
-/* This is not used. */
+ entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, key,
+ FALSE, FALSE);
+ return entry ? entry->head : NULL;
+}
-static int
-read_2_signed_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+/* 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 struct dwarf_debug_section *sec,
+ asymbol ** syms,
+ bfd_uint64_t offset,
+ bfd_byte ** section_buffer,
+ bfd_size_type * section_size)
{
- return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
+ asection *msec;
+ const char *section_name = sec->uncompressed_name;
+
+ /* The section may have already been read. */
+ if (*section_buffer == NULL)
+ {
+ msec = bfd_get_section_by_name (abfd, section_name);
+ if (! msec)
+ {
+ section_name = sec->compressed_name;
+ if (section_name != NULL)
+ msec = bfd_get_section_by_name (abfd, section_name);
+ }
+ if (! msec)
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: Can't find %s section."),
+ sec->uncompressed_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_byte *) bfd_malloc (*section_size);
+ if (! *section_buffer)
+ return FALSE;
+ if (! bfd_get_section_contents (abfd, msec, *section_buffer,
+ 0, *section_size))
+ 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;
}
-#endif
+/* Read dwarf information from a buffer. */
static unsigned int
-read_4_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end)
{
- return bfd_get_32 (abfd, (bfd_byte *) buf);
+ if (buf + 1 > end)
+ return 0;
+ return bfd_get_8 (abfd, buf);
}
-#if 0
-
-/* This is not used. */
-
static int
-read_4_signed_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end)
{
- return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
+ if (buf + 1 > end)
+ return 0;
+ return bfd_get_signed_8 (abfd, buf);
}
-#endif
+static unsigned int
+read_2_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end)
+{
+ if (buf + 2 > end)
+ return 0;
+ return bfd_get_16 (abfd, buf);
+}
static unsigned int
-read_8_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_4_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end)
{
- return bfd_get_64 (abfd, (bfd_byte *) buf);
+ if (buf + 4 > end)
+ return 0;
+ return bfd_get_32 (abfd, buf);
}
-static char *
-read_n_bytes (abfd, buf, size)
- bfd * abfd;
- char *buf;
- unsigned int size;
-{
- /* 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. */
+static bfd_uint64_t
+read_8_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end)
+{
+ if (buf + 8 > end)
+ return 0;
+ return bfd_get_64 (abfd, buf);
+}
+
+static bfd_byte *
+read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_byte *buf,
+ bfd_byte *end,
+ unsigned int size ATTRIBUTE_UNUSED)
+{
+ if (buf + size > end)
+ return NULL;
return buf;
}
+/* Scans a NUL terminated string starting at BUF, returning a pointer to it.
+ Returns the number of characters in the string, *including* the NUL byte,
+ in BYTES_READ_PTR. This value is set even if the function fails. Bytes
+ at or beyond BUF_END will not be read. Returns NULL if there was a
+ problem, or if the string is empty. */
+
static char *
-read_string (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
+read_string (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_byte * buf,
+ bfd_byte * buf_end,
+ unsigned int * bytes_read_ptr)
{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the string, otherwise we have to copy the string to a buffer
- allocated on the temporary obstack. */
- if (*buf == '\0')
+ bfd_byte *str = buf;
+
+ if (buf >= buf_end)
{
- *bytes_read_ptr = 1;
+ * bytes_read_ptr = 0;
return NULL;
}
- *bytes_read_ptr = strlen (buf) + 1;
- return buf;
+
+ if (*str == '\0')
+ {
+ * bytes_read_ptr = 1;
+ return NULL;
+ }
+
+ while (buf < buf_end)
+ if (* buf ++ == 0)
+ {
+ * bytes_read_ptr = buf - str;
+ return (char *) str;
+ }
+
+ * bytes_read_ptr = buf - str;
+ return NULL;
}
-static unsigned int
-read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
-{
- unsigned int result, num_read;
- int i, shift;
- unsigned char byte;
-
- result = 0;
- shift = 0;
- num_read = 0;
- i = 0;
- while (1)
+/* Reads an offset from BUF and then locates the string at this offset
+ inside the debug string section. Returns a pointer to the string.
+ Returns the number of bytes read from BUF, *not* the length of the string,
+ in BYTES_READ_PTR. This value is set even if the function fails. Bytes
+ at or beyond BUF_END will not be read from BUF. Returns NULL if there was
+ a problem, or if the string is empty. Does not check for NUL termination
+ of the string. */
+
+static char *
+read_indirect_string (struct comp_unit * unit,
+ bfd_byte * buf,
+ bfd_byte * buf_end,
+ unsigned int * bytes_read_ptr)
+{
+ bfd_uint64_t offset;
+ struct dwarf2_debug *stash = unit->stash;
+ char *str;
+
+ if (buf + unit->offset_size > buf_end)
{
- byte = bfd_get_8 (abfd, (bfd_byte *) buf);
- buf++;
- num_read++;
- result |= ((byte & 127) << shift);
- if ((byte & 128) == 0)
- {
- break;
- }
- shift += 7;
+ * bytes_read_ptr = 0;
+ return NULL;
}
- *bytes_read_ptr = num_read;
- return result;
+
+ if (unit->offset_size == 4)
+ offset = read_4_bytes (unit->abfd, buf, buf_end);
+ else
+ offset = read_8_bytes (unit->abfd, buf, buf_end);
+
+ *bytes_read_ptr = unit->offset_size;
+
+ if (! read_section (unit->abfd, &stash->debug_sections[debug_str],
+ stash->syms, offset,
+ &stash->dwarf_str_buffer, &stash->dwarf_str_size))
+ return NULL;
+
+ if (offset >= stash->dwarf_str_size)
+ return NULL;
+ str = (char *) stash->dwarf_str_buffer + offset;
+ if (*str == '\0')
+ return NULL;
+ return str;
}
-static int
-read_signed_leb128 (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
-{
- int result;
- int i, shift, size, num_read;
- unsigned char byte;
-
- result = 0;
- shift = 0;
- size = 32;
- num_read = 0;
- i = 0;
- while (1)
+/* Like read_indirect_string but uses a .debug_str located in
+ an alternate file pointed to by the .gnu_debugaltlink section.
+ Used to impement DW_FORM_GNU_strp_alt. */
+
+static char *
+read_alt_indirect_string (struct comp_unit * unit,
+ bfd_byte * buf,
+ bfd_byte * buf_end,
+ unsigned int * bytes_read_ptr)
+{
+ bfd_uint64_t offset;
+ struct dwarf2_debug *stash = unit->stash;
+ char *str;
+
+ if (buf + unit->offset_size > buf_end)
{
- byte = bfd_get_8 (abfd, (bfd_byte *) buf);
- buf++;
- num_read++;
- result |= ((byte & 127) << shift);
- shift += 7;
- if ((byte & 128) == 0)
- {
- break;
- }
+ * bytes_read_ptr = 0;
+ return NULL;
}
- if ((shift < size) && (byte & 0x40))
+
+ if (unit->offset_size == 4)
+ offset = read_4_bytes (unit->abfd, buf, buf_end);
+ else
+ offset = read_8_bytes (unit->abfd, buf, buf_end);
+
+ *bytes_read_ptr = unit->offset_size;
+
+ if (stash->alt_bfd_ptr == NULL)
{
- result |= -(1 << shift);
+ bfd * debug_bfd;
+ char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
+
+ if (debug_filename == NULL)
+ return NULL;
+
+ if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
+ || ! bfd_check_format (debug_bfd, bfd_object))
+ {
+ if (debug_bfd)
+ bfd_close (debug_bfd);
+
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ free (debug_filename);
+ return NULL;
+ }
+ stash->alt_bfd_ptr = debug_bfd;
}
- *bytes_read_ptr = num_read;
- return result;
-}
-/* END VERBATUM */
+ if (! read_section (unit->stash->alt_bfd_ptr,
+ stash->debug_sections + debug_str_alt,
+ NULL, /* FIXME: Do we need to load alternate symbols ? */
+ offset,
+ &stash->alt_dwarf_str_buffer,
+ &stash->alt_dwarf_str_size))
+ return NULL;
+
+ if (offset >= stash->alt_dwarf_str_size)
+ return NULL;
+ str = (char *) stash->alt_dwarf_str_buffer + offset;
+ if (*str == '\0')
+ return NULL;
+
+ return str;
+}
+/* Resolve an alternate reference from UNIT at OFFSET.
+ Returns a pointer into the loaded alternate CU upon success
+ or NULL upon failure. */
-static bfd_vma
-read_address (abfd, buf)
- bfd *abfd;
- char *buf;
+static bfd_byte *
+read_alt_indirect_ref (struct comp_unit * unit,
+ bfd_uint64_t offset)
{
- bfd_vma retval = 0;
+ struct dwarf2_debug *stash = unit->stash;
- if (sizeof(retval) == 4)
+ if (stash->alt_bfd_ptr == NULL)
{
- retval = bfd_get_32 (abfd, (bfd_byte *) buf);
- } else {
- retval = bfd_get_64 (abfd, (bfd_byte *) buf);
- }
- return retval;
-}
+ bfd * debug_bfd;
+ char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
+ if (debug_filename == NULL)
+ return FALSE;
+ if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
+ || ! bfd_check_format (debug_bfd, bfd_object))
+ {
+ if (debug_bfd)
+ bfd_close (debug_bfd);
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ free (debug_filename);
+ return NULL;
+ }
+ stash->alt_bfd_ptr = debug_bfd;
+ }
+ if (! read_section (unit->stash->alt_bfd_ptr,
+ stash->debug_sections + debug_info_alt,
+ NULL, /* FIXME: Do we need to load alternate symbols ? */
+ offset,
+ &stash->alt_dwarf_info_buffer,
+ &stash->alt_dwarf_info_size))
+ return NULL;
+
+ if (offset >= stash->alt_dwarf_info_size)
+ return NULL;
+ return stash->alt_dwarf_info_buffer + offset;
+}
-/* This data structure holds the information of an abbrev. */
-struct abbrev_info
- {
- unsigned int number; /* number identifying abbrev */
- enum dwarf_tag tag; /* dwarf tag */
- int has_children; /* boolean */
- unsigned int num_attrs; /* number of attributes */
- struct attr_abbrev *attrs; /* an array of attribute descriptions */
- struct abbrev_info *next; /* next in chain */
- };
+static bfd_uint64_t
+read_address (struct comp_unit *unit, bfd_byte *buf, bfd_byte * buf_end)
+{
+ int signed_vma = 0;
-struct attr_abbrev
- {
- enum dwarf_attribute name;
- enum dwarf_form form;
- };
+ if (bfd_get_flavour (unit->abfd) == bfd_target_elf_flavour)
+ signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma;
-#ifndef ABBREV_HASH_SIZE
-#define ABBREV_HASH_SIZE 121
-#endif
-#ifndef ATTR_ALLOC_CHUNK
-#define ATTR_ALLOC_CHUNK 4
-#endif
+ if (buf + unit->addr_size > buf_end)
+ return 0;
+
+ if (signed_vma)
+ {
+ 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 ();
+ }
+ }
+}
/* Lookup an abbrev_info structure in the abbrev hash table. */
static struct abbrev_info *
-lookup_abbrev (number,abbrevs)
- unsigned int number;
- struct abbrev_info **abbrevs;
+lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs)
{
unsigned int hash_number;
struct abbrev_info *abbrev;
else
abbrev = abbrev->next;
}
+
return NULL;
}
in a hash table. */
static struct abbrev_info**
-read_abbrevs (abfd, offset)
- bfd * abfd;
- unsigned int offset;
+read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash)
{
struct abbrev_info **abbrevs;
- char *abbrev_ptr;
+ bfd_byte *abbrev_ptr;
+ bfd_byte *abbrev_end;
struct abbrev_info *cur_abbrev;
unsigned int abbrev_number, bytes_read, abbrev_name;
unsigned int abbrev_form, hash_number;
- struct dwarf2_debug *stash;
+ bfd_size_type amt;
- stash = elf_tdata(abfd)->dwarf2_find_line_info;
+ if (! read_section (abfd, &stash->debug_sections[debug_abbrev],
+ stash->syms, offset,
+ &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size))
+ return NULL;
- if (! stash->dwarf_abbrev_buffer)
- {
- asection *msec;
+ if (offset >= stash->dwarf_abbrev_size)
+ return NULL;
- 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 = bfd_get_section_size_before_reloc (msec);
- stash->dwarf_abbrev_buffer = (unsigned char*) bfd_alloc (abfd, stash->dwarf_abbrev_size);
- if (! stash->dwarf_abbrev_buffer)
- return 0;
-
- if (! bfd_get_section_contents (abfd, msec,
- stash->dwarf_abbrev_buffer, 0,
- stash->dwarf_abbrev_size))
- return 0;
- }
-
- if (offset > stash->dwarf_abbrev_size)
- {
- (*_bfd_error_handler) ("Dwarf Error: Abbrev offset (%u) bigger than abbrev size (%u).",
- offset, stash->dwarf_abbrev_size );
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
-
- abbrevs = (struct abbrev_info**) bfd_zalloc (abfd, sizeof(struct abbrev_info*) * ABBREV_HASH_SIZE);
+ amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE;
+ abbrevs = (struct abbrev_info **) bfd_zalloc (abfd, amt);
+ if (abbrevs == NULL)
+ return NULL;
abbrev_ptr = stash->dwarf_abbrev_buffer + offset;
- abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_end = stash->dwarf_abbrev_buffer + stash->dwarf_abbrev_size;
+ abbrev_number = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
- /* loop until we reach an abbrev number of 0 */
+ /* Loop until we reach an abbrev number of 0. */
while (abbrev_number)
{
- cur_abbrev = (struct abbrev_info*)bfd_zalloc (abfd, sizeof (struct abbrev_info));
+ amt = sizeof (struct abbrev_info);
+ cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt);
+ if (cur_abbrev == NULL)
+ return NULL;
- /* read in abbrev header */
+ /* Read in abbrev header. */
cur_abbrev->number = abbrev_number;
- cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ cur_abbrev->tag = (enum dwarf_tag)
+ safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
- cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
+ cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr, abbrev_end);
abbrev_ptr += 1;
- /* now read in declarations */
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ /* Now read in declarations. */
+ abbrev_name = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_form = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
+
while (abbrev_name)
{
if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
{
- cur_abbrev->attrs = (struct attr_abbrev *)
- bfd_realloc (cur_abbrev->attrs,
- (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
- * sizeof (struct attr_abbrev));
- if (! cur_abbrev->attrs)
- return 0;
+ struct attr_abbrev *tmp;
+
+ amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK;
+ amt *= sizeof (struct attr_abbrev);
+ tmp = (struct attr_abbrev *) 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 = abbrev_name;
- cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+
+ cur_abbrev->attrs[cur_abbrev->num_attrs].name
+ = (enum dwarf_attribute) abbrev_name;
+ cur_abbrev->attrs[cur_abbrev->num_attrs++].form
+ = (enum dwarf_form) abbrev_form;
+ abbrev_name = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_form = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
}
abbrevs[hash_number] = cur_abbrev;
/* Get next abbreviation.
- Under Irix6 the abbreviations for a compilation unit are not
+ Under Irix6 the abbreviations for a compilation unit are not
always properly terminated with an abbrev number of 0.
Exit loop if we encounter an abbreviation which we have
already read (which means we are about to read the abbreviations
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_number = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end);
abbrev_ptr += bytes_read;
- if (lookup_abbrev (abbrev_number,abbrevs) != NULL)
+ if (lookup_abbrev (abbrev_number, abbrevs) != NULL)
break;
}
return abbrevs;
}
-/* Read an attribute described by an abbreviated attribute. */
+/* Returns true if the form is one which has a string value. */
-static char *
-read_attribute (attr, abbrev, abfd, info_ptr)
- struct attribute *attr;
- struct attr_abbrev *abbrev;
- bfd *abfd;
- char *info_ptr;
+static inline bfd_boolean
+is_str_attr (enum dwarf_form form)
+{
+ return form == DW_FORM_string || form == DW_FORM_strp || form == DW_FORM_GNU_strp_alt;
+}
+
+/* Read and fill in the value of attribute ATTR as described by FORM.
+ Read data starting from INFO_PTR, but never at or beyond INFO_PTR_END.
+ Returns an updated INFO_PTR taking into account the amount of data read. */
+
+static bfd_byte *
+read_attribute_value (struct attribute * attr,
+ unsigned form,
+ struct comp_unit * unit,
+ bfd_byte * info_ptr,
+ bfd_byte * info_ptr_end)
{
+ bfd *abfd = unit->abfd;
unsigned int bytes_read;
struct dwarf_block *blk;
+ bfd_size_type amt;
- attr->name = abbrev->name;
- attr->form = abbrev->form;
- switch (abbrev->form)
+ if (info_ptr >= info_ptr_end && form != DW_FORM_flag_present)
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: Info pointer extends beyond end of attributes"));
+ bfd_set_error (bfd_error_bad_value);
+ return info_ptr;
+ }
+
+ attr->form = (enum dwarf_form) form;
+
+ switch (form)
{
- case DW_FORM_addr:
case DW_FORM_ref_addr:
- DW_ADDR (attr) = read_address (abfd, info_ptr);
- info_ptr += sizeof(bfd_vma);
+ /* DW_FORM_ref_addr is an address in DWARF2, and an offset in
+ DWARF3. */
+ if (unit->version == 3 || unit->version == 4)
+ {
+ if (unit->offset_size == 4)
+ attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end);
+ else
+ attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end);
+ info_ptr += unit->offset_size;
+ break;
+ }
+ /* FALLTHROUGH */
+ case DW_FORM_addr:
+ attr->u.val = read_address (unit, info_ptr, info_ptr_end);
+ info_ptr += unit->addr_size;
+ break;
+ case DW_FORM_GNU_ref_alt:
+ case DW_FORM_sec_offset:
+ if (unit->offset_size == 4)
+ attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end);
+ else
+ attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end);
+ info_ptr += unit->offset_size;
break;
case DW_FORM_block2:
- blk = (struct dwarf_block *) bfd_alloc (abfd, sizeof (struct dwarf_block));
- blk->size = read_2_bytes (abfd, info_ptr);
+ amt = sizeof (struct dwarf_block);
+ blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
+ if (blk == NULL)
+ return NULL;
+ blk->size = read_2_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 2;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
+ attr->u.blk = blk;
break;
case DW_FORM_block4:
- blk = (struct dwarf_block *) bfd_alloc (abfd, sizeof (struct dwarf_block));
- blk->size = read_4_bytes (abfd, info_ptr);
+ amt = sizeof (struct dwarf_block);
+ blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
+ if (blk == NULL)
+ return NULL;
+ blk->size = read_4_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 4;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
+ attr->u.blk = blk;
break;
case DW_FORM_data2:
- DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
+ attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 2;
break;
case DW_FORM_data4:
- DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
+ attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 4;
break;
case DW_FORM_data8:
- DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
+ attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 8;
break;
case DW_FORM_string:
- DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
+ attr->u.str = read_string (abfd, info_ptr, info_ptr_end, &bytes_read);
info_ptr += bytes_read;
break;
+ case DW_FORM_strp:
+ attr->u.str = read_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_GNU_strp_alt:
+ attr->u.str = read_alt_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_exprloc:
case DW_FORM_block:
- blk = (struct dwarf_block *) bfd_alloc (abfd, sizeof (struct dwarf_block));
- blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ amt = sizeof (struct dwarf_block);
+ blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
+ if (blk == NULL)
+ return NULL;
+ blk->size = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
info_ptr += bytes_read;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
+ attr->u.blk = blk;
break;
case DW_FORM_block1:
- blk = (struct dwarf_block *) bfd_alloc (abfd, sizeof (struct dwarf_block));
- blk->size = read_1_byte (abfd, info_ptr);
+ amt = sizeof (struct dwarf_block);
+ blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
+ if (blk == NULL)
+ return NULL;
+ blk->size = read_1_byte (abfd, info_ptr, info_ptr_end);
info_ptr += 1;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
+ attr->u.blk = blk;
break;
case DW_FORM_data1:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end);
info_ptr += 1;
break;
case DW_FORM_flag:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end);
info_ptr += 1;
break;
+ case DW_FORM_flag_present:
+ attr->u.val = 1;
+ break;
case DW_FORM_sdata:
- DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
+ attr->u.sval = safe_read_leb128 (abfd, info_ptr, &bytes_read, TRUE, info_ptr_end);
info_ptr += bytes_read;
break;
case DW_FORM_udata:
- DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ attr->u.val = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
info_ptr += bytes_read;
break;
case DW_FORM_ref1:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end);
info_ptr += 1;
break;
case DW_FORM_ref2:
- DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
+ attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 2;
break;
case DW_FORM_ref4:
- DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
+ attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 4;
break;
+ case DW_FORM_ref8:
+ attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end);
+ info_ptr += 8;
+ break;
+ case DW_FORM_ref_sig8:
+ attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end);
+ info_ptr += 8;
+ break;
case DW_FORM_ref_udata:
- DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ attr->u.val = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
info_ptr += bytes_read;
break;
- case DW_FORM_strp:
case DW_FORM_indirect:
+ form = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
+ info_ptr += bytes_read;
+ info_ptr = read_attribute_value (attr, form, unit, info_ptr, info_ptr_end);
+ break;
default:
- (*_bfd_error_handler) ("Dwarf Error: Invalid or unhandled FORM value: %d.",
- abbrev->form);
+ (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %#x."),
+ form);
bfd_set_error (bfd_error_bad_value);
+ return NULL;
}
return info_ptr;
}
+/* Read an attribute described by an abbreviated attribute. */
+
+static bfd_byte *
+read_attribute (struct attribute * attr,
+ struct attr_abbrev * abbrev,
+ struct comp_unit * unit,
+ bfd_byte * info_ptr,
+ bfd_byte * info_ptr_end)
+{
+ attr->name = abbrev->name;
+ info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr, info_ptr_end);
+ return info_ptr;
+}
+
+/* Return whether DW_AT_name will return the same as DW_AT_linkage_name
+ for a function. */
+
+static bfd_boolean
+non_mangled (int lang)
+{
+ switch (lang)
+ {
+ default:
+ return FALSE;
+
+ case DW_LANG_C89:
+ case DW_LANG_C:
+ case DW_LANG_Ada83:
+ case DW_LANG_Cobol74:
+ case DW_LANG_Cobol85:
+ case DW_LANG_Fortran77:
+ case DW_LANG_Pascal83:
+ case DW_LANG_C99:
+ case DW_LANG_Ada95:
+ case DW_LANG_PLI:
+ case DW_LANG_UPC:
+ case DW_LANG_C11:
+ return TRUE;
+ }
+}
-/* Source line information table routines. */
+/* Source line information table routines. */
#define FILE_ALLOC_CHUNK 5
#define DIR_ALLOC_CHUNK 5
-struct line_info {
+struct line_info
+{
struct line_info* prev_line;
-
bfd_vma address;
- char* filename;
+ char *filename;
unsigned int line;
unsigned int column;
+ unsigned int discriminator;
+ unsigned char op_index;
+ unsigned char end_sequence; /* End of (sequential) code sequence. */
};
-struct fileinfo {
+struct fileinfo
+{
char *name;
unsigned int dir;
unsigned int time;
unsigned int size;
};
-struct line_info_table {
- bfd* abfd;
+struct line_sequence
+{
+ bfd_vma low_pc;
+ struct line_sequence* prev_sequence;
+ struct line_info* last_line; /* Largest VMA. */
+};
+
+struct line_info_table
+{
+ bfd* abfd;
+ unsigned int num_files;
+ unsigned int num_dirs;
+ unsigned int num_sequences;
+ char * comp_dir;
+ char ** dirs;
+ struct fileinfo* files;
+ struct line_sequence* sequences;
+ 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. */
- unsigned int num_files;
- unsigned int num_dirs;
+struct funcinfo
+{
+ /* Pointer to previous function in list of all functions. */
+ struct funcinfo *prev_func;
+ /* Pointer to function one scope higher. */
+ struct funcinfo *caller_func;
+ /* Source location file name where caller_func inlines this func. */
+ char *caller_file;
+ /* Source location file name. */
+ char *file;
+ /* Source location line number where caller_func inlines this func. */
+ int caller_line;
+ /* Source location line number. */
+ int line;
+ int tag;
+ bfd_boolean is_linkage;
+ const char *name;
+ struct arange arange;
+ /* Where the symbol is defined. */
+ asection *sec;
+};
- char* comp_dir;
- char** dirs;
- struct fileinfo* files;
- struct line_info* last_line;
+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;
};
-static void
-add_line_info (table, address, filename, line, column)
- struct line_info_table* table;
- bfd_vma address;
- char* filename;
- unsigned int line;
- unsigned int column;
+/* 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->op_index > line->op_index
+ || (new_line->op_index == line->op_index
+ && 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,
+ line_info->prev_line always accesses an equal or smaller VMA. */
+
+static bfd_boolean
+add_line_info (struct line_info_table *table,
+ bfd_vma address,
+ unsigned char op_index,
+ char *filename,
+ unsigned int line,
+ unsigned int column,
+ unsigned int discriminator,
+ int end_sequence)
{
- struct line_info* info = (struct line_info*)
- bfd_alloc (table->abfd, sizeof (struct line_info));
+ bfd_size_type amt = sizeof (struct line_info);
+ struct line_sequence* seq = table->sequences;
+ struct line_info* info = (struct line_info *) bfd_alloc (table->abfd, amt);
- info->prev_line = table->last_line;
- table->last_line = info;
+ if (info == NULL)
+ return FALSE;
+ /* Set member data of 'info'. */
+ info->prev_line = NULL;
info->address = address;
- info->filename = filename;
+ info->op_index = op_index;
info->line = line;
info->column = column;
-}
+ info->discriminator = discriminator;
+ info->end_sequence = end_sequence;
-static char*
-concat_filename (table, file)
- struct line_info_table* table;
- unsigned int file;
-{
- char* filename = table->files[file - 1].name;
- if (*filename == '/')
- return filename;
+ if (filename && filename[0])
+ {
+ info->filename = (char *) bfd_alloc (table->abfd, strlen (filename) + 1);
+ if (info->filename == NULL)
+ return FALSE;
+ 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
+ so we include some heuristics for quickly finding the correct
+ location for 'info'. In particular, these heuristics optimize for
+ the common case in which the VMA sequence that we receive is a
+ list of locally sorted VMAs such as
+ p...z a...j (where a < j < p < z)
+
+ Note: table->lcl_head is used to head an *actual* or *possible*
+ sub-sequence within the list (such as a...j) that is not directly
+ headed by table->last_line
+
+ Note: we may receive duplicate entries from 'decode_line_info'. */
+
+ if (seq
+ && seq->last_line->address == address
+ && seq->last_line->op_index == op_index
+ && seq->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 == seq->last_line)
+ table->lcl_head = info;
+ info->prev_line = seq->last_line->prev_line;
+ seq->last_line = info;
+ }
+ else if (!seq || seq->last_line->end_sequence)
+ {
+ /* Start a new line sequence. */
+ amt = sizeof (struct line_sequence);
+ seq = (struct line_sequence *) bfd_malloc (amt);
+ if (seq == NULL)
+ return FALSE;
+ seq->low_pc = address;
+ seq->prev_sequence = table->sequences;
+ seq->last_line = info;
+ table->lcl_head = info;
+ table->sequences = seq;
+ table->num_sequences++;
+ }
+ else if (new_line_sorts_after (info, seq->last_line))
+ {
+ /* Normal case: add 'info' to the beginning of the current sequence. */
+ info->prev_line = seq->last_line;
+ seq->last_line = info;
+ /* 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)))
+ {
+ /* 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
{
- char* dirname = (table->files[file - 1].dir
- ? table->dirs[table->files[file - 1].dir - 1]
- : table->comp_dir);
- return (char*) concat (dirname, "/", filename, NULL);
+ /* Abnormal and hard: Neither 'last_line' nor 'lcl_head'
+ are valid heads for 'info'. Reset 'lcl_head'. */
+ struct line_info* li2 = seq->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;
+ if (address < seq->low_pc)
+ seq->low_pc = address;
}
+ return TRUE;
}
-/* Decode the line number information for the compilation unit whose
- line number info is at OFFSET in the .debug_line section.
- The compilation directory of the file is passed in COMP_DIR. */
+/* 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 struct line_info_table*
-decode_line_info (abfd, offset, comp_dir)
- bfd *abfd;
- unsigned int offset;
- char *comp_dir;
+static char *
+concat_filename (struct line_info_table *table, unsigned int file)
{
- static char* dwarf_line_buffer = 0;
+ char *filename;
- struct line_info_table* table;
+ if (file - 1 >= table->num_files)
+ {
+ /* FILE == 0 means unknown. */
+ if (file)
+ (*_bfd_error_handler)
+ (_("Dwarf Error: mangled line number section (bad file number)."));
+ return strdup ("<unknown>");
+ }
- char *line_ptr;
- char *line_end;
- struct line_head lh;
- unsigned int i, bytes_read;
- char *cur_file, *cur_dir;
- unsigned char op_code, extended_op, adj_opcode;
+ filename = table->files[file - 1].name;
- if (! dwarf_line_buffer)
+ if (!IS_ABSOLUTE_PATH (filename))
{
- asection *msec;
- unsigned long size;
+ char *dir_name = NULL;
+ char *subdir_name = NULL;
+ char *name;
+ size_t len;
+
+ if (table->files[file - 1].dir
+ /* PR 17512: file: 0317e960. */
+ && table->files[file - 1].dir <= table->num_dirs
+ /* PR 17512: file: 7f3d2e4b. */
+ && table->dirs != NULL)
+ subdir_name = table->dirs[table->files[file - 1].dir - 1];
+
+ if (!subdir_name || !IS_ABSOLUTE_PATH (subdir_name))
+ dir_name = table->comp_dir;
+
+ if (!dir_name)
+ {
+ dir_name = subdir_name;
+ subdir_name = NULL;
+ }
- msec = bfd_get_section_by_name (abfd, ".debug_line");
- if (! msec)
+ if (!dir_name)
+ return strdup (filename);
+
+ len = strlen (dir_name) + strlen (filename) + 2;
+
+ if (subdir_name)
{
- (*_bfd_error_handler) ("Dwarf Error: Can't find .debug_line section.");
- bfd_set_error (bfd_error_bad_value);
- return 0;
+ len += strlen (subdir_name) + 1;
+ name = (char *) bfd_malloc (len);
+ if (name)
+ sprintf (name, "%s/%s/%s", dir_name, subdir_name, filename);
+ }
+ else
+ {
+ name = (char *) bfd_malloc (len);
+ if (name)
+ sprintf (name, "%s/%s", dir_name, filename);
+ }
+
+ return name;
+ }
+
+ return strdup (filename);
+}
+
+static bfd_boolean
+arange_add (const struct comp_unit *unit, struct arange *first_arange,
+ bfd_vma low_pc, bfd_vma high_pc)
+{
+ struct arange *arange;
+
+ /* Ignore empty ranges. */
+ if (low_pc == high_pc)
+ return TRUE;
+
+ /* If the first arange is empty, use it. */
+ if (first_arange->high == 0)
+ {
+ first_arange->low = low_pc;
+ first_arange->high = high_pc;
+ return TRUE;
+ }
+
+ /* Next see if we can cheaply extend an existing range. */
+ arange = first_arange;
+ do
+ {
+ if (low_pc == arange->high)
+ {
+ arange->high = high_pc;
+ return TRUE;
+ }
+ if (high_pc == arange->low)
+ {
+ arange->low = low_pc;
+ return TRUE;
}
-
- size = bfd_get_section_size_before_reloc (msec);
- dwarf_line_buffer = (unsigned char*) bfd_alloc (abfd, size);
- if (! dwarf_line_buffer)
- return 0;
+ arange = arange->next;
+ }
+ while (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 = (struct arange *) bfd_alloc (unit->abfd, sizeof (*arange));
+ if (arange == NULL)
+ return FALSE;
+ arange->low = low_pc;
+ arange->high = high_pc;
+ arange->next = first_arange->next;
+ first_arange->next = arange;
+ return TRUE;
+}
+
+/* Compare function for line sequences. */
+
+static int
+compare_sequences (const void* a, const void* b)
+{
+ const struct line_sequence* seq1 = a;
+ const struct line_sequence* seq2 = b;
+
+ /* Sort by low_pc as the primary key. */
+ if (seq1->low_pc < seq2->low_pc)
+ return -1;
+ if (seq1->low_pc > seq2->low_pc)
+ return 1;
+
+ /* If low_pc values are equal, sort in reverse order of
+ high_pc, so that the largest region comes first. */
+ if (seq1->last_line->address < seq2->last_line->address)
+ return 1;
+ if (seq1->last_line->address > seq2->last_line->address)
+ return -1;
+
+ if (seq1->last_line->op_index < seq2->last_line->op_index)
+ return 1;
+ if (seq1->last_line->op_index > seq2->last_line->op_index)
+ return -1;
+
+ return 0;
+}
- if (! bfd_get_section_contents (abfd, msec,
- dwarf_line_buffer, 0,
- size))
- return 0;
+/* Sort the line sequences for quick lookup. */
+
+static bfd_boolean
+sort_line_sequences (struct line_info_table* table)
+{
+ bfd_size_type amt;
+ struct line_sequence* sequences;
+ struct line_sequence* seq;
+ unsigned int n = 0;
+ unsigned int num_sequences = table->num_sequences;
+ bfd_vma last_high_pc;
+
+ if (num_sequences == 0)
+ return TRUE;
+
+ /* Allocate space for an array of sequences. */
+ amt = sizeof (struct line_sequence) * num_sequences;
+ sequences = (struct line_sequence *) bfd_alloc (table->abfd, amt);
+ if (sequences == NULL)
+ return FALSE;
+
+ /* Copy the linked list into the array, freeing the original nodes. */
+ seq = table->sequences;
+ for (n = 0; n < num_sequences; n++)
+ {
+ struct line_sequence* last_seq = seq;
+
+ BFD_ASSERT (seq);
+ sequences[n].low_pc = seq->low_pc;
+ sequences[n].prev_sequence = NULL;
+ sequences[n].last_line = seq->last_line;
+ seq = seq->prev_sequence;
+ free (last_seq);
+ }
+ BFD_ASSERT (seq == NULL);
+
+ qsort (sequences, n, sizeof (struct line_sequence), compare_sequences);
+
+ /* Make the list binary-searchable by trimming overlapping entries
+ and removing nested entries. */
+ num_sequences = 1;
+ last_high_pc = sequences[0].last_line->address;
+ for (n = 1; n < table->num_sequences; n++)
+ {
+ if (sequences[n].low_pc < last_high_pc)
+ {
+ if (sequences[n].last_line->address <= last_high_pc)
+ /* Skip nested entries. */
+ continue;
+
+ /* Trim overlapping entries. */
+ sequences[n].low_pc = last_high_pc;
+ }
+ last_high_pc = sequences[n].last_line->address;
+ if (n > num_sequences)
+ {
+ /* Close up the gap. */
+ sequences[num_sequences].low_pc = sequences[n].low_pc;
+ sequences[num_sequences].last_line = sequences[n].last_line;
+ }
+ num_sequences++;
}
- table = (struct line_info_table*) bfd_alloc (abfd,
- sizeof (struct line_info_table));
+ table->sequences = sequences;
+ table->num_sequences = num_sequences;
+ return TRUE;
+}
+
+/* Decode the line number information for UNIT. */
+
+static struct line_info_table*
+decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
+{
+ bfd *abfd = unit->abfd;
+ struct line_info_table* table;
+ bfd_byte *line_ptr;
+ bfd_byte *line_end;
+ struct line_head lh;
+ unsigned int i, bytes_read, offset_size;
+ char *cur_file, *cur_dir;
+ unsigned char op_code, extended_op, adj_opcode;
+ unsigned int exop_len;
+ bfd_size_type amt;
+
+ if (! read_section (abfd, &stash->debug_sections[debug_line],
+ stash->syms, unit->line_offset,
+ &stash->dwarf_line_buffer, &stash->dwarf_line_size))
+ return NULL;
+
+ amt = sizeof (struct line_info_table);
+ table = (struct line_info_table *) bfd_alloc (abfd, amt);
+ if (table == NULL)
+ return NULL;
table->abfd = abfd;
- table->comp_dir = comp_dir;
+ table->comp_dir = unit->comp_dir;
table->num_files = 0;
table->files = NULL;
table->num_dirs = 0;
table->dirs = NULL;
- line_ptr = dwarf_line_buffer + offset;
+ table->num_sequences = 0;
+ table->sequences = NULL;
+
+ table->lcl_head = NULL;
+
+ if (stash->dwarf_line_size < 16)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Line info section is too small (%ld)"),
+ (long) stash->dwarf_line_size);
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+ line_ptr = stash->dwarf_line_buffer + unit->line_offset;
+ line_end = stash->dwarf_line_buffer + stash->dwarf_line_size;
- /* read in the prologue */
- lh.total_length = read_4_bytes (abfd, line_ptr);
+ /* Read in the prologue. */
+ lh.total_length = read_4_bytes (abfd, line_ptr, line_end);
line_ptr += 4;
+ offset_size = 4;
+ if (lh.total_length == 0xffffffff)
+ {
+ lh.total_length = read_8_bytes (abfd, line_ptr, line_end);
+ line_ptr += 8;
+ offset_size = 8;
+ }
+ else if (lh.total_length == 0 && unit->addr_size == 8)
+ {
+ /* Handle (non-standard) 64-bit DWARF2 formats. */
+ lh.total_length = read_4_bytes (abfd, line_ptr, line_end);
+ line_ptr += 4;
+ offset_size = 8;
+ }
+
+ if (lh.total_length > stash->dwarf_line_size)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Line info data is bigger (0x%lx) than the section (0x%lx)"),
+ (long) lh.total_length, (long) stash->dwarf_line_size);
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+
line_end = line_ptr + lh.total_length;
- lh.version = read_2_bytes (abfd, line_ptr);
+
+ lh.version = read_2_bytes (abfd, line_ptr, line_end);
+ if (lh.version < 2 || lh.version > 4)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Unhandled .debug_line version %d."), lh.version);
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
line_ptr += 2;
- lh.prologue_length = read_4_bytes (abfd, line_ptr);
- line_ptr += 4;
- lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
+
+ if (line_ptr + offset_size + (lh.version >=4 ? 6 : 5) >= line_end)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Ran out of room reading prologue"));
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+
+ if (offset_size == 4)
+ lh.prologue_length = read_4_bytes (abfd, line_ptr, line_end);
+ else
+ lh.prologue_length = read_8_bytes (abfd, line_ptr, line_end);
+ line_ptr += offset_size;
+
+ lh.minimum_instruction_length = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- lh.default_is_stmt = read_1_byte (abfd, line_ptr);
+
+ if (lh.version >= 4)
+ {
+ lh.maximum_ops_per_insn = read_1_byte (abfd, line_ptr, line_end);
+ line_ptr += 1;
+ }
+ else
+ lh.maximum_ops_per_insn = 1;
+
+ if (lh.maximum_ops_per_insn == 0)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Invalid maximum operations per instruction."));
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+
+ lh.default_is_stmt = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- lh.line_base = read_1_signed_byte (abfd, line_ptr);
+
+ lh.line_base = read_1_signed_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- lh.line_range = read_1_byte (abfd, line_ptr);
+
+ lh.line_range = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- lh.opcode_base = read_1_byte (abfd, line_ptr);
+
+ lh.opcode_base = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- lh.standard_opcode_lengths = (unsigned char *)
- bfd_alloc (abfd, lh.opcode_base * sizeof (unsigned char));
+
+ if (line_ptr + (lh.opcode_base - 1) >= line_end)
+ {
+ (*_bfd_error_handler) (_("Dwarf Error: Ran out of room reading opcodes"));
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+
+ amt = lh.opcode_base * sizeof (unsigned char);
+ lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt);
lh.standard_opcode_lengths[0] = 1;
+
for (i = 1; i < lh.opcode_base; ++i)
{
- lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
+ lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
}
- /* Read directory table */
- while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
+ /* Read directory table. */
+ while ((cur_dir = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL)
{
line_ptr += bytes_read;
+
if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0)
{
- table->dirs = (char **)
- bfd_realloc (table->dirs,
- (table->num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
- if (! table->dirs)
- return 0;
+ char **tmp;
+
+ amt = table->num_dirs + DIR_ALLOC_CHUNK;
+ amt *= sizeof (char *);
+
+ tmp = (char **) bfd_realloc (table->dirs, amt);
+ if (tmp == NULL)
+ goto fail;
+ table->dirs = tmp;
}
+
table->dirs[table->num_dirs++] = cur_dir;
}
+
line_ptr += bytes_read;
- /* Read file name table */
- while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
+ /* Read file name table. */
+ while ((cur_file = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL)
{
line_ptr += bytes_read;
+
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
- table->files = (struct fileinfo *)
- bfd_realloc (table->files,
- (table->num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (! table->files)
- return 0;
+ struct fileinfo *tmp;
+
+ amt = table->num_files + FILE_ALLOC_CHUNK;
+ amt *= sizeof (struct fileinfo);
+
+ tmp = (struct fileinfo *) bfd_realloc (table->files, amt);
+ if (tmp == NULL)
+ goto fail;
+ table->files = tmp;
}
+
table->files[table->num_files].name = cur_file;
table->files[table->num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
- table->files[table->num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ table->files[table->num_files].time = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
- table->files[table->num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ table->files[table->num_files].size = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
table->num_files++;
}
+
line_ptr += bytes_read;
/* Read the statement sequences until there's nothing left. */
while (line_ptr < line_end)
{
- /* state machine registers */
+ /* State machine registers. */
bfd_vma address = 0;
- char* filename = concat_filename (table, 1);
+ unsigned char op_index = 0;
+ char * filename = table->num_files ? concat_filename (table, 1) : NULL;
unsigned int line = 1;
unsigned int column = 0;
+ unsigned int discriminator = 0;
int is_stmt = lh.default_is_stmt;
- int basic_block = 0;
int end_sequence = 0;
-
- /* Decode the table. */
+ /* 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 = (bfd_vma) -1;
+ bfd_vma high_pc = 0;
+
+ /* Decode the table. */
while (! end_sequence)
{
- op_code = read_1_byte (abfd, line_ptr);
+ op_code = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
- switch (op_code)
+
+ if (op_code >= lh.opcode_base)
+ {
+ /* Special operand. */
+ adj_opcode = op_code - lh.opcode_base;
+ if (lh.line_range == 0)
+ goto line_fail;
+ if (lh.maximum_ops_per_insn == 1)
+ address += (adj_opcode / lh.line_range
+ * lh.minimum_instruction_length);
+ else
+ {
+ address += ((op_index + adj_opcode / lh.line_range)
+ / lh.maximum_ops_per_insn
+ * lh.minimum_instruction_length);
+ op_index = ((op_index + adj_opcode / lh.line_range)
+ % lh.maximum_ops_per_insn);
+ }
+ line += lh.line_base + (adj_opcode % lh.line_range);
+ /* Append row to matrix using current values. */
+ if (!add_line_info (table, address, op_index, filename,
+ line, column, discriminator, 0))
+ goto line_fail;
+ discriminator = 0;
+ if (address < low_pc)
+ low_pc = address;
+ if (address > high_pc)
+ high_pc = address;
+ }
+ else switch (op_code)
{
case DW_LNS_extended_op:
- line_ptr += 1; /* ignore length */
- extended_op = read_1_byte (abfd, line_ptr);
+ exop_len = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
+ line_ptr += bytes_read;
+ extended_op = read_1_byte (abfd, line_ptr, line_end);
line_ptr += 1;
+
switch (extended_op)
{
case DW_LNE_end_sequence:
end_sequence = 1;
- add_line_info (table, address, filename, line, column);
+ if (!add_line_info (table, address, op_index, filename, line,
+ column, discriminator, end_sequence))
+ goto line_fail;
+ discriminator = 0;
+ if (address < low_pc)
+ low_pc = address;
+ if (address > high_pc)
+ high_pc = address;
+ if (!arange_add (unit, &unit->arange, low_pc, high_pc))
+ goto line_fail;
break;
case DW_LNE_set_address:
- address = read_address (abfd, line_ptr);
- address &= 0xffffffff;
- line_ptr += sizeof (bfd_vma);
+ address = read_address (unit, line_ptr, line_end);
+ op_index = 0;
+ line_ptr += unit->addr_size;
break;
case DW_LNE_define_file:
- cur_file = read_string (abfd, line_ptr, &bytes_read);
+ cur_file = read_string (abfd, line_ptr, line_end, &bytes_read);
line_ptr += bytes_read;
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
- table->files = (struct fileinfo *)
- bfd_realloc (table->files,
- (table->num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (! table->files)
- return 0;
+ struct fileinfo *tmp;
+
+ amt = table->num_files + FILE_ALLOC_CHUNK;
+ amt *= sizeof (struct fileinfo);
+ tmp = (struct fileinfo *) bfd_realloc (table->files, amt);
+ if (tmp == NULL)
+ goto line_fail;
+ table->files = tmp;
}
table->files[table->num_files].name = cur_file;
table->files[table->num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
table->files[table->num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
table->files[table->num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
table->num_files++;
break;
+ case DW_LNE_set_discriminator:
+ discriminator =
+ safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNE_HP_source_file_correlation:
+ line_ptr += exop_len - 1;
+ break;
default:
- (*_bfd_error_handler) ("Dwarf Error: mangled line number section.");
+ (*_bfd_error_handler)
+ (_("Dwarf Error: mangled line number section."));
bfd_set_error (bfd_error_bad_value);
- return 0;
+ line_fail:
+ if (filename != NULL)
+ free (filename);
+ goto fail;
}
break;
case DW_LNS_copy:
- add_line_info (table, address, filename, line, column);
- basic_block = 0;
+ if (!add_line_info (table, address, op_index,
+ filename, line, column, discriminator, 0))
+ goto line_fail;
+ discriminator = 0;
+ if (address < low_pc)
+ low_pc = address;
+ if (address > high_pc)
+ high_pc = address;
break;
case DW_LNS_advance_pc:
- address += lh.minimum_instruction_length
- * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ if (lh.maximum_ops_per_insn == 1)
+ address += (lh.minimum_instruction_length
+ * safe_read_leb128 (abfd, line_ptr, &bytes_read,
+ FALSE, line_end));
+ else
+ {
+ bfd_vma adjust = safe_read_leb128 (abfd, line_ptr, &bytes_read,
+ FALSE, line_end);
+ address = ((op_index + adjust) / lh.maximum_ops_per_insn
+ * lh.minimum_instruction_length);
+ op_index = (op_index + adjust) % lh.maximum_ops_per_insn;
+ }
line_ptr += bytes_read;
break;
case DW_LNS_advance_line:
- line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
+ line += safe_read_leb128 (abfd, line_ptr, &bytes_read, TRUE, line_end);
line_ptr += bytes_read;
break;
case DW_LNS_set_file:
{
unsigned int file;
- /* The file and directory tables are 0 based, the references
- are 1 based. */
- file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ /* The file and directory tables are 0
+ based, the references are 1 based. */
+ file = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
+ if (filename)
+ free (filename);
filename = concat_filename (table, file);
break;
}
case DW_LNS_set_column:
- column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ column = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
line_ptr += bytes_read;
break;
case DW_LNS_negate_stmt:
is_stmt = (!is_stmt);
break;
case DW_LNS_set_basic_block:
- basic_block = 1;
break;
case DW_LNS_const_add_pc:
- address += (255 - lh.opcode_base) / lh.line_range;
+ if (lh.maximum_ops_per_insn == 1)
+ address += (lh.minimum_instruction_length
+ * ((255 - lh.opcode_base) / lh.line_range));
+ else
+ {
+ bfd_vma adjust = ((255 - lh.opcode_base) / lh.line_range);
+ address += (lh.minimum_instruction_length
+ * ((op_index + adjust)
+ / lh.maximum_ops_per_insn));
+ op_index = (op_index + adjust) % lh.maximum_ops_per_insn;
+ }
break;
case DW_LNS_fixed_advance_pc:
- address += read_2_bytes (abfd, line_ptr);
+ address += read_2_bytes (abfd, line_ptr, line_end);
+ op_index = 0;
line_ptr += 2;
break;
- default: /* special operand */
- adj_opcode = op_code - lh.opcode_base;
- address += (adj_opcode / lh.line_range)
- * lh.minimum_instruction_length;
- line += lh.line_base + (adj_opcode % lh.line_range);
- /* append row to matrix using current values */
- add_line_info (table, address, filename, line, column);
- basic_block = 1;
+ default:
+ /* Unknown standard opcode, ignore it. */
+ for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++)
+ {
+ (void) safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end);
+ line_ptr += bytes_read;
+ }
+ break;
}
}
+
+ if (filename)
+ free (filename);
}
- return table;
-}
+ if (sort_line_sequences (table))
+ return table;
+ fail:
+ if (table->sequences != NULL)
+ free (table->sequences);
+ if (table->files != NULL)
+ free (table->files);
+ if (table->dirs != NULL)
+ free (table->dirs);
+ return NULL;
+}
-/* 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. */
+/* If ADDR is within TABLE set the output parameters and return the
+ range of addresses covered by the entry used to fill them out.
+ Otherwise set * FILENAME_PTR to NULL and return 0.
+ The parameters FILENAME_PTR, LINENUMBER_PTR and DISCRIMINATOR_PTR
+ are pointers to the objects to be filled in. */
-static boolean
-lookup_address_in_line_info_table (table,
- addr,
- filename_ptr,
- linenumber_ptr)
- struct line_info_table* table;
- bfd_vma addr;
- const char **filename_ptr;
- unsigned int *linenumber_ptr;
+static bfd_vma
+lookup_address_in_line_info_table (struct line_info_table *table,
+ bfd_vma addr,
+ const char **filename_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int *discriminator_ptr)
{
- struct line_info* each_line;
- struct line_info* next_line;
-
- for (next_line = 0, each_line = table->last_line;
- each_line;
- next_line = each_line, each_line = each_line->prev_line)
+ struct line_sequence *seq = NULL;
+ struct line_info *each_line;
+ int low, high, mid;
+
+ /* Binary search the array of sequences. */
+ low = 0;
+ high = table->num_sequences;
+ while (low < high)
{
- if (addr >= each_line->address
- && (next_line == 0
- || addr < next_line->address))
- {
+ mid = (low + high) / 2;
+ seq = &table->sequences[mid];
+ if (addr < seq->low_pc)
+ high = mid;
+ else if (addr >= seq->last_line->address)
+ low = mid + 1;
+ else
+ break;
+ }
+
+ if (seq && addr >= seq->low_pc && addr < seq->last_line->address)
+ {
+ /* Note: seq->last_line should be a descendingly sorted list. */
+ for (each_line = seq->last_line;
+ each_line;
+ each_line = each_line->prev_line)
+ if (addr >= each_line->address)
+ break;
+
+ if (each_line
+ && !(each_line->end_sequence || each_line == seq->last_line))
+ {
*filename_ptr = each_line->filename;
*linenumber_ptr = each_line->line;
- return true;
+ if (discriminator_ptr)
+ *discriminator_ptr = each_line->discriminator;
+ return seq->last_line->address - seq->low_pc;
}
}
-
- return false;
+
+ *filename_ptr = NULL;
+ return 0;
}
-
+/* 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, &stash->debug_sections[debug_ranges],
+ stash->syms, 0,
+ &stash->dwarf_ranges_buffer, &stash->dwarf_ranges_size);
+}
-/* Function table functions. */
+/* Function table functions. */
-struct funcinfo {
- struct funcinfo *prev_func;
+/* If ADDR is within UNIT's function tables, set FUNCTION_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. */
- char* name;
- bfd_vma low;
- bfd_vma high;
-};
+static bfd_boolean
+lookup_address_in_function_table (struct comp_unit *unit,
+ bfd_vma addr,
+ struct funcinfo **function_ptr)
+{
+ struct funcinfo* each_func;
+ struct funcinfo* best_fit = NULL;
+ bfd_vma best_fit_len = 0;
+ struct arange *arange;
+
+ for (each_func = unit->function_table;
+ each_func;
+ each_func = each_func->prev_func)
+ {
+ for (arange = &each_func->arange;
+ arange;
+ arange = arange->next)
+ {
+ if (addr >= arange->low && addr < arange->high)
+ {
+ if (!best_fit
+ || arange->high - arange->low < best_fit_len)
+ {
+ best_fit = each_func;
+ best_fit_len = arange->high - arange->low;
+ }
+ }
+ }
+ }
+ if (best_fit)
+ {
+ *function_ptr = best_fit;
+ return TRUE;
+ }
+ return FALSE;
+}
-/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return true. */
+/* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR
+ and LINENUMBER_PTR, and return TRUE. */
-static boolean
-lookup_address_in_function_table (table,
- addr,
- functionname_ptr)
- struct funcinfo* table;
- bfd_vma addr;
- const char **functionname_ptr;
+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;
+ bfd_vma best_fit_len = 0;
+ struct arange *arange;
+ const char *name = bfd_asymbol_name (sym);
+ asection *sec = bfd_get_section (sym);
- for (each_func = table;
+ for (each_func = unit->function_table;
each_func;
each_func = each_func->prev_func)
{
- if (addr >= (each_func->low & 0xffffffff)
- && addr < (each_func->high & 0xffffffff))
+ for (arange = &each_func->arange;
+ arange;
+ arange = arange->next)
{
- *functionname_ptr = each_func->name;
- return true;
+ 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_len))
+ {
+ best_fit = each_func;
+ best_fit_len = arange->high - arange->low;
+ }
}
}
-
- return false;
+
+ 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;
-/* DWARF2 Compilation unit functions. */
+ 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,
+ struct attribute *attr_ptr,
+ bfd_boolean *is_linkage)
+{
+ bfd *abfd = unit->abfd;
+ bfd_byte *info_ptr;
+ bfd_byte *info_ptr_end;
+ 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 = NULL;
-/* A minimal decoding of DWARF2 compilation units. We only decode
- what's needed to get to the line number information. */
+ /* 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 ();
-struct comp_unit {
+ info_ptr = unit->sec_info_ptr + die_ref;
+ info_ptr_end = unit->end_ptr;
- /* Chain the previously read compilation units. */
- struct comp_unit* next_unit;
+ /* Now find the CU containing this pointer. */
+ if (info_ptr >= unit->info_ptr_unit && info_ptr < unit->end_ptr)
+ ;
+ else
+ {
+ /* Check other CUs to see if they contain the abbrev. */
+ struct comp_unit * u;
- /* Keep the bdf convenient (for memory allocation). */
- bfd* abfd;
+ for (u = unit->prev_unit; u != NULL; u = u->prev_unit)
+ if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr)
+ break;
- /* The lowest and higest addresses contained in this compilation
- unit as specified in the compilation unit header. */
- bfd_vma low;
- bfd_vma high;
+ if (u == NULL)
+ for (u = unit->next_unit; u != NULL; u = u->next_unit)
+ if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr)
+ break;
- /* The DW_AT_name attribute (for error messages). */
- char* name;
+ if (u)
+ unit = u;
+ /* else FIXME: What do we do now ? */
+ }
+ }
+ else if (attr_ptr->form == DW_FORM_GNU_ref_alt)
+ {
+ info_ptr = read_alt_indirect_ref (unit, die_ref);
+ if (info_ptr == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Unable to read alt ref %u."), die_ref);
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+ info_ptr_end = unit->stash->alt_dwarf_info_buffer + unit->stash->alt_dwarf_info_size;
- /* The abbrev hash table. */
- struct abbrev_info** abbrevs;
+ /* FIXME: Do we need to locate the correct CU, in a similar
+ fashion to the code in the DW_FORM_ref_addr case above ? */
+ }
+ else
+ {
+ info_ptr = unit->info_ptr_unit + die_ref;
+ info_ptr_end = unit->end_ptr;
+ }
- /* Note that an error was found by comp_unit_find_nearest_line. */
- int error;
+ abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
+ info_ptr += bytes_read;
- /* The DW_AT_comp_dir attribute */
- char* comp_dir;
+ if (abbrev_number)
+ {
+ abbrev = lookup_abbrev (abbrev_number, unit->abbrevs);
+ if (! abbrev)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Could not find abbrev number %u."), abbrev_number);
+ bfd_set_error (bfd_error_bad_value);
+ }
+ else
+ {
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ {
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit,
+ info_ptr, info_ptr_end);
+ if (info_ptr == NULL)
+ break;
+ switch (attr.name)
+ {
+ case DW_AT_name:
+ /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name
+ over DW_AT_name. */
+ if (name == NULL && is_str_attr (attr.form))
+ {
+ name = attr.u.str;
+ if (non_mangled (unit->lang))
+ *is_linkage = TRUE;
+ }
+ break;
+ case DW_AT_specification:
+ name = find_abstract_instance_name (unit, &attr, is_linkage);
+ break;
+ case DW_AT_linkage_name:
+ case DW_AT_MIPS_linkage_name:
+ /* PR 16949: Corrupt debug info can place
+ non-string forms into these attributes. */
+ if (is_str_attr (attr.form))
+ {
+ name = attr.u.str;
+ *is_linkage = TRUE;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+ return name;
+}
- /* 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. */
- unsigned long line_offset;
+static bfd_boolean
+read_rangelist (struct comp_unit *unit, struct arange *arange,
+ bfd_uint64_t offset)
+{
+ bfd_byte *ranges_ptr;
+ bfd_byte *ranges_end;
+ bfd_vma base_address = unit->base_address;
- /* Pointer to the first child die for the comp unit. */
- char *first_child_die_ptr;
+ if (! unit->stash->dwarf_ranges_buffer)
+ {
+ if (! read_debug_ranges (unit))
+ return FALSE;
+ }
- /* The end of the comp unit. */
- char *end_ptr;
+ ranges_ptr = unit->stash->dwarf_ranges_buffer + offset;
+ if (ranges_ptr < unit->stash->dwarf_ranges_buffer)
+ return FALSE;
+ ranges_end = unit->stash->dwarf_ranges_buffer + unit->stash->dwarf_ranges_size;
- /* The decoded line number, NULL if not yet decoded. */
- struct line_info_table* line_table;
+ for (;;)
+ {
+ bfd_vma low_pc;
+ bfd_vma high_pc;
- /* A list of the functions found in this comp. unit. */
- struct funcinfo* function_table;
+ /* PR 17512: file: 62cada7d. */
+ if (ranges_ptr + 2 * unit->addr_size > ranges_end)
+ return FALSE;
-};
+ low_pc = read_address (unit, ranges_ptr, ranges_end);
+ ranges_ptr += unit->addr_size;
+ high_pc = read_address (unit, ranges_ptr, ranges_end);
+ 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
+ {
+ if (!arange_add (unit, arange,
+ base_address + low_pc, base_address + high_pc))
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+/* 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 boolean
-scan_unit_for_functions (unit)
- struct comp_unit *unit;
+static bfd_boolean
+scan_unit_for_symbols (struct comp_unit *unit)
{
bfd *abfd = unit->abfd;
- char *info_ptr = unit->first_child_die_ptr;
+ bfd_byte *info_ptr = unit->first_child_die_ptr;
+ bfd_byte *info_ptr_end = unit->stash->info_ptr_end;
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 = (struct funcinfo **)
+ 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;
+ bfd_boolean high_pc_relative = FALSE;
+
+ /* PR 17512: file: 9f405d9d. */
+ if (info_ptr >= info_ptr_end)
+ goto fail;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end);
info_ptr += bytes_read;
if (! abbrev_number)
nesting_level--;
continue;
}
-
+
abbrev = lookup_abbrev (abbrev_number,unit->abbrevs);
if (! abbrev)
{
- (*_bfd_error_handler) ("Dwarf Error: Could not find abbrev number %d.",
- abbrev_number);
+ (*_bfd_error_handler)
+ (_("Dwarf Error: Could not find abbrev number %u."),
+ abbrev_number);
bfd_set_error (bfd_error_bad_value);
- return false;
+ goto fail;
}
-
- if (abbrev->tag == DW_TAG_subprogram)
+
+ var = NULL;
+ if (abbrev->tag == DW_TAG_subprogram
+ || abbrev->tag == DW_TAG_entry_point
+ || abbrev->tag == DW_TAG_inlined_subroutine)
{
- func = (struct funcinfo*) bfd_zalloc (abfd, sizeof (struct funcinfo));
+ bfd_size_type amt = sizeof (struct funcinfo);
+ func = (struct funcinfo *) bfd_zalloc (abfd, amt);
+ if (func == NULL)
+ goto fail;
+ 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 = (struct varinfo *) bfd_zalloc (abfd, amt);
+ if (var == NULL)
+ goto fail;
+ 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)
{
- info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
-
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr, info_ptr_end);
+ if (info_ptr == NULL)
+ goto fail;
+
if (func)
{
switch (attr.name)
{
- case DW_AT_name:
-
- name = DW_STRING (&attr);
+ case DW_AT_call_file:
+ func->caller_file = concat_filename (unit->line_table,
+ attr.u.val);
+ break;
- /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
- if (func->name == NULL)
- func->name = DW_STRING (&attr);
+ case DW_AT_call_line:
+ func->caller_line = attr.u.val;
break;
-
+
+ case DW_AT_abstract_origin:
+ case DW_AT_specification:
+ func->name = find_abstract_instance_name (unit, &attr,
+ &func->is_linkage);
+ break;
+
+ case DW_AT_name:
+ /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name
+ over DW_AT_name. */
+ if (func->name == NULL && is_str_attr (attr.form))
+ {
+ func->name = attr.u.str;
+ if (non_mangled (unit->lang))
+ func->is_linkage = TRUE;
+ }
+ break;
+
+ case DW_AT_linkage_name:
case DW_AT_MIPS_linkage_name:
- func->name = DW_STRING (&attr);
+ /* PR 16949: Corrupt debug info can place
+ non-string forms into these attributes. */
+ if (is_str_attr (attr.form))
+ {
+ func->name = attr.u.str;
+ func->is_linkage = TRUE;
+ }
break;
case DW_AT_low_pc:
- func->low = DW_ADDR (&attr);
+ low_pc = attr.u.val;
break;
case DW_AT_high_pc:
- func->high = DW_ADDR (&attr);
+ high_pc = attr.u.val;
+ high_pc_relative = attr.form != DW_FORM_addr;
+ break;
+
+ case DW_AT_ranges:
+ if (!read_rangelist (unit, &func->arange, attr.u.val))
+ goto fail;
+ 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 = DW_STRING (&attr);
+ 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:
+ case DW_FORM_exprloc:
+ 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:
break;
}
}
}
- if (abbrev->has_children)
- nesting_level++;
- }
-
- return true;
-}
+ if (high_pc_relative)
+ high_pc += low_pc;
+ if (func && high_pc != 0)
+ {
+ if (!arange_add (unit, &func->arange, low_pc, high_pc))
+ goto fail;
+ }
+ if (abbrev->has_children)
+ {
+ nesting_level++;
+ if (nesting_level >= nested_funcs_size)
+ {
+ struct funcinfo **tmp;
+
+ nested_funcs_size *= 2;
+ tmp = (struct funcinfo **)
+ bfd_realloc (nested_funcs,
+ nested_funcs_size * sizeof (struct funcinfo *));
+ if (tmp == NULL)
+ goto fail;
+ nested_funcs = tmp;
+ }
+ nested_funcs[nesting_level] = 0;
+ }
+ }
+ free (nested_funcs);
+ return TRUE;
+ fail:
+ free (nested_funcs);
+ return FALSE;
+}
-/* Parse a DWARF2 compilation unit starting at INFO_PTR. This includes
- the compilation unit header that proceeds the DIE's, but does not
- include the length field that preceeds each compilation unit header.
- END_PTR points one past the end of this comp unit.
+/* Parse a DWARF2 compilation unit starting at INFO_PTR. This
+ includes the compilation unit header that proceeds the DIE's, but
+ does not include the length field that precedes each compilation
+ unit header. END_PTR points one past the end of this comp unit.
+ OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes).
This routine does not read the whole compilation unit; only enough
- to get to the line number information for the compilation unit.
- */
+ to get to the line number information for the compilation unit. */
-static struct comp_unit*
-parse_comp_unit (abfd, info_ptr, end_ptr)
- bfd* abfd;
- char* info_ptr;
- char* end_ptr;
+static struct comp_unit *
+parse_comp_unit (struct dwarf2_debug *stash,
+ bfd_vma unit_length,
+ bfd_byte *info_ptr_unit,
+ unsigned int offset_size)
{
struct comp_unit* unit;
-
- unsigned short version;
- unsigned int abbrev_offset;
- unsigned char addr_size;
+ unsigned int version;
+ bfd_uint64_t abbrev_offset = 0;
+ unsigned int addr_size;
struct abbrev_info** abbrevs;
-
unsigned int abbrev_number, bytes_read, i;
struct abbrev_info *abbrev;
struct attribute attr;
-
- version = read_2_bytes (abfd, info_ptr);
+ 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_ptr;
+ bfd_boolean high_pc_relative = FALSE;
+
+ version = read_2_bytes (abfd, info_ptr, end_ptr);
info_ptr += 2;
- abbrev_offset = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- addr_size = read_1_byte (abfd, info_ptr);
+ BFD_ASSERT (offset_size == 4 || offset_size == 8);
+ if (offset_size == 4)
+ abbrev_offset = read_4_bytes (abfd, info_ptr, end_ptr);
+ else
+ abbrev_offset = read_8_bytes (abfd, info_ptr, end_ptr);
+ info_ptr += offset_size;
+ addr_size = read_1_byte (abfd, info_ptr, end_ptr);
info_ptr += 1;
- if (version != 2)
+ if (version != 2 && version != 3 && version != 4)
+ {
+ /* PR 19872: A version number of 0 probably means that there is padding
+ at the end of the .debug_info section. Gold puts it there when
+ performing an incremental link, for example. So do not generate
+ an error, just return a NULL. */
+ if (version)
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: found dwarf version '%u', this reader"
+ " only handles version 2, 3 and 4 information."), version);
+ bfd_set_error (bfd_error_bad_value);
+ }
+ return NULL;
+ }
+
+ if (addr_size > sizeof (bfd_vma))
{
- (*_bfd_error_handler) ("Dwarf Error: found dwarf version '%hu', this reader only handles version 2 information.", version );
+ (*_bfd_error_handler)
+ (_("Dwarf Error: found address size '%u', this reader"
+ " can not handle sizes greater than '%u'."),
+ addr_size,
+ (unsigned int) sizeof (bfd_vma));
bfd_set_error (bfd_error_bad_value);
- return 0;
+ return NULL;
}
- if (addr_size != sizeof (bfd_vma))
+ if (addr_size != 2 && addr_size != 4 && addr_size != 8)
{
- (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this readers only handles address size '%u'.",
- addr_size,
- sizeof (bfd_vma));
+ (*_bfd_error_handler)
+ ("Dwarf Error: found address size '%u', this reader"
+ " can only handle address sizes '2', '4' and '8'.", addr_size);
bfd_set_error (bfd_error_bad_value);
- return 0;
+ return NULL;
}
- /* Read the abbrevs for this compilation unit into a table */
- abbrevs = read_abbrevs (abfd, abbrev_offset);
+ /* Read the abbrevs for this compilation unit into a table. */
+ abbrevs = read_abbrevs (abfd, abbrev_offset, stash);
if (! abbrevs)
- return 0;
+ return NULL;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, end_ptr);
info_ptr += bytes_read;
if (! abbrev_number)
{
- (*_bfd_error_handler) ("Dwarf Error: Bad abbrev number: %d.",
- abbrev_number);
- bfd_set_error (bfd_error_bad_value);
- return 0;
+ /* PR 19872: An abbrev number of 0 probably means that there is padding
+ at the end of the .debug_abbrev section. Gold puts it there when
+ performing an incremental link, for example. So do not generate
+ an error, just return a NULL. */
+ return NULL;
}
abbrev = lookup_abbrev (abbrev_number, abbrevs);
if (! abbrev)
{
- (*_bfd_error_handler) ("Dwarf Error: Could not find abbrev number %d.",
- abbrev_number);
+ (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."),
+ abbrev_number);
bfd_set_error (bfd_error_bad_value);
- return 0;
+ return NULL;
}
-
- unit = (struct comp_unit*) bfd_zalloc (abfd, sizeof (struct comp_unit));
+
+ amt = sizeof (struct comp_unit);
+ unit = (struct comp_unit *) bfd_zalloc (abfd, amt);
+ if (unit == NULL)
+ return NULL;
unit->abfd = abfd;
+ unit->version = version;
+ unit->addr_size = addr_size;
+ unit->offset_size = offset_size;
unit->abbrevs = abbrevs;
unit->end_ptr = end_ptr;
+ unit->stash = stash;
+ unit->info_ptr_unit = info_ptr_unit;
+ unit->sec_info_ptr = stash->sec_info_ptr;
for (i = 0; i < abbrev->num_attrs; ++i)
{
- info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr, end_ptr);
+ if (info_ptr == NULL)
+ return NULL;
/* Store the data if it is of an attribute we want to keep in a
partial symbol table. */
{
case DW_AT_stmt_list:
unit->stmtlist = 1;
- unit->line_offset = DW_UNSND (&attr);
+ unit->line_offset = attr.u.val;
break;
case DW_AT_name:
- unit->name = DW_STRING (&attr);
+ unit->name = attr.u.str;
break;
case DW_AT_low_pc:
- unit->low = DW_ADDR (&attr);
+ 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. */
+ if (abbrev->tag == DW_TAG_compile_unit)
+ unit->base_address = low_pc;
break;
case DW_AT_high_pc:
- unit->high = DW_ADDR (&attr);
+ high_pc = attr.u.val;
+ high_pc_relative = attr.form != DW_FORM_addr;
+ break;
+
+ case DW_AT_ranges:
+ if (!read_rangelist (unit, &unit->arange, attr.u.val))
+ return NULL;
break;
case DW_AT_comp_dir:
{
- char* comp_dir = DW_STRING (&attr);
+ char *comp_dir = attr.u.str;
+
+ /* PR 17512: file: 1fe726be. */
+ if (! is_str_attr (attr.form))
+ {
+ (*_bfd_error_handler)
+ (_("Dwarf Error: DW_AT_comp_dir attribute encountered with a non-string form."));
+ comp_dir = NULL;
+ }
+
if (comp_dir)
{
/* Irix 6.2 native cc prepends <machine>.: to the compilation
directory, get rid of it. */
- char *cp = (char*) strchr (comp_dir, ':');
+ char *cp = strchr (comp_dir, ':');
if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
comp_dir = cp + 1;
break;
}
+ case DW_AT_language:
+ unit->lang = attr.u.val;
+ break;
+
default:
break;
}
}
+ if (high_pc_relative)
+ high_pc += low_pc;
+ if (high_pc != 0)
+ {
+ if (!arange_add (unit, &unit->arange, low_pc, high_pc))
+ return NULL;
+ }
unit->first_child_die_ptr = info_ptr;
return unit;
}
+/* 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)
+{
+ struct arange *arange;
+ if (unit->error)
+ return FALSE;
+ arange = &unit->arange;
+ do
+ {
+ if (addr >= arange->low && addr < arange->high)
+ return TRUE;
+ arange = arange->next;
+ }
+ while (arange);
-/* Return true if UNIT contains the address given by ADDR. */
-
-static boolean
-comp_unit_contains_address (unit, addr)
- struct comp_unit* unit;
- bfd_vma addr;
-{
- return ! unit->error
- && ( addr >= (unit->low & 0xffffffff)
- && addr <= (unit->high & 0xffffffff));
+ return FALSE;
}
-
/* If UNIT contains ADDR, set the output parameters to the values for
the line containing ADDR. The output parameters, FILENAME_PTR,
- 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. */
-
-static boolean
-comp_unit_find_nearest_line (unit, addr,
- filename_ptr, functionname_ptr, linenumber_ptr)
- struct comp_unit* unit;
- bfd_vma addr;
- const char **filename_ptr;
- const char **functionname_ptr;
- unsigned int *linenumber_ptr;
-{
- boolean line_p;
- boolean func_p;
-
+ FUNCTION_PTR, and LINENUMBER_PTR, are pointers to the objects
+ to be filled in.
+
+ Returns the range of addresses covered by the entry that was used
+ to fill in *LINENUMBER_PTR or 0 if it was not filled in. */
+
+static bfd_vma
+comp_unit_find_nearest_line (struct comp_unit *unit,
+ bfd_vma addr,
+ const char **filename_ptr,
+ struct funcinfo **function_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int *discriminator_ptr,
+ struct dwarf2_debug *stash)
+{
+ bfd_boolean func_p;
+
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->abfd,
- unit->line_offset,
- unit->comp_dir);
+
+ unit->line_table = decode_line_info (unit, stash);
if (! unit->line_table)
{
unit->error = 1;
- return false;
+ return FALSE;
}
-
- if (! scan_unit_for_functions (unit))
+
+ if (unit->first_child_die_ptr < unit->end_ptr
+ && ! scan_unit_for_symbols (unit))
{
unit->error = 1;
- return false;
+ return FALSE;
}
}
- line_p = lookup_address_in_line_info_table (unit->line_table,
- addr,
- filename_ptr,
- linenumber_ptr);
- func_p = lookup_address_in_function_table (unit->function_table,
- addr,
- functionname_ptr);
- return line_p || func_p;
+ *function_ptr = NULL;
+ func_p = lookup_address_in_function_table (unit, addr, function_ptr);
+ if (func_p && (*function_ptr)->tag == DW_TAG_inlined_subroutine)
+ stash->inliner_chain = *function_ptr;
+
+ return lookup_address_in_line_info_table (unit->line_table, addr,
+ filename_ptr,
+ linenumber_ptr,
+ discriminator_ptr);
}
-/* The DWARF2 version of find_nearest line.
- Return true if the line is found without error. */
+/* 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. */
-boolean
-_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr, linenumber_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- const char **filename_ptr;
- const char **functionname_ptr;
- unsigned int *linenumber_ptr;
+static bfd_boolean
+comp_unit_maybe_decode_line_info (struct comp_unit *unit,
+ 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.
-
- 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 = elf_tdata (abfd)->dwarf2_find_line_info;
-
- /* What address are we looking for? */
- bfd_vma addr = offset + section->vma;
-
- struct comp_unit* each;
-
- *filename_ptr = NULL;
- *functionname_ptr = NULL;
- *linenumber_ptr = 0;
+ if (unit->error)
+ return FALSE;
- if (! stash)
+ if (! unit->line_table)
{
- asection *msec;
- unsigned long size;
-
- stash = elf_tdata (abfd)->dwarf2_find_line_info =
- (struct dwarf2_debug*) bfd_zalloc (abfd, sizeof (struct dwarf2_debug));
-
- if (! stash)
- return false;
-
- msec = bfd_get_section_by_name (abfd, ".debug_info");
- if (! msec)
+ if (! unit->stmtlist)
{
- /* 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;
+ unit->error = 1;
+ return FALSE;
}
- size = bfd_get_section_size_before_reloc (msec);
- stash->info_ptr = (unsigned char*) bfd_alloc (abfd, size);
-
- if (! stash->info_ptr)
- return false;
+ unit->line_table = decode_line_info (unit, stash);
- if (! bfd_get_section_contents (abfd, msec, stash->info_ptr, 0, size))
+ if (! unit->line_table)
{
- stash->info_ptr = 0;
- return false;
+ unit->error = 1;
+ return FALSE;
}
- stash->info_ptr_end = stash->info_ptr + size;
+ if (unit->first_child_die_ptr < unit->end_ptr
+ && ! scan_unit_for_symbols (unit))
+ {
+ unit->error = 1;
+ return FALSE;
+ }
}
-
- /* A null info_ptr indicates that there is no dwarf2 info
- (or that an error occured while setting up the stash). */
+ return TRUE;
+}
- if (! stash->info_ptr)
- return false;
+/* 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);
+}
- /* Check the previously read comp. units first. */
+static struct funcinfo *
+reverse_funcinfo_list (struct funcinfo *head)
+{
+ struct funcinfo *rhead;
+ struct funcinfo *temp;
- for (each = stash->all_comp_units; each; each = each->next_unit)
+ for (rhead = NULL; head; head = temp)
{
- if (comp_unit_contains_address (each, addr))
- return comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- functionname_ptr,
- linenumber_ptr);
+ 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;
- /* Read each remaining comp. units checking each as they are read. */
- while (stash->info_ptr < stash->info_ptr_end)
+ for (rhead = NULL; head; head = temp)
{
- struct comp_unit* each;
- unsigned int length;
+ temp = head->prev_var;
+ head->prev_var = rhead;
+ rhead = head;
+ }
+ return rhead;
+}
- length = read_4_bytes (abfd, stash->info_ptr);
- stash->info_ptr += 4;
+/* 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. */
- if (length > 0)
- {
- each = parse_comp_unit (abfd, stash->info_ptr,
- stash->info_ptr + length);
- stash->info_ptr += length;
+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;
- if (each)
- {
- each->next_unit = stash->all_comp_units;
- stash->all_comp_units = each;
-
- if (comp_unit_contains_address (each, addr))
- return comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- functionname_ptr,
- linenumber_ptr);
- }
- }
- }
+ BFD_ASSERT (stash->info_hash_status != STASH_INFO_HASH_DISABLED);
- return false;
+ 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;
}
-/* end of file */
+/* 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
+ sections. There are three permissiable names. The first two are given
+ by DEBUG_SECTIONS[debug_info] (whose standard DWARF2 names are .debug_info
+ and .zdebug_info). The third is a prefix .gnu.linkonce.wi.
+ This is a variation on the .debug_info section which has a checksum
+ describing the contents appended onto the name. This allows the linker to
+ identify and discard duplicate debugging sections for different
+ compilation units. */
+#define GNU_LINKONCE_INFO ".gnu.linkonce.wi."
+
+static asection *
+find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
+ asection *after_sec)
+{
+ asection *msec;
+ const char *look;
+
+ if (after_sec == NULL)
+ {
+ look = debug_sections[debug_info].uncompressed_name;
+ msec = bfd_get_section_by_name (abfd, look);
+ if (msec != NULL)
+ return msec;
+
+ look = debug_sections[debug_info].compressed_name;
+ if (look != NULL)
+ {
+ msec = bfd_get_section_by_name (abfd, look);
+ if (msec != NULL)
+ return msec;
+ }
+
+ for (msec = abfd->sections; msec != NULL; msec = msec->next)
+ if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO))
+ return msec;
+
+ return NULL;
+ }
+
+ for (msec = after_sec->next; msec != NULL; msec = msec->next)
+ {
+ look = debug_sections[debug_info].uncompressed_name;
+ if (strcmp (msec->name, look) == 0)
+ return msec;
+
+ look = debug_sections[debug_info].compressed_name;
+ if (look != NULL && strcmp (msec->name, look) == 0)
+ return msec;
+
+ if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO))
+ return msec;
+ }
+
+ return NULL;
+}
+
+/* Transfer VMAs from object file to separate debug file. */
+
+static void
+set_debug_vma (bfd *orig_bfd, bfd *debug_bfd)
+{
+ asection *s, *d;
+
+ for (s = orig_bfd->sections, d = debug_bfd->sections;
+ s != NULL && d != NULL;
+ s = s->next, d = d->next)
+ {
+ if ((d->flags & SEC_DEBUGGING) != 0)
+ break;
+ /* ??? Assumes 1-1 correspondence between sections in the
+ two files. */
+ if (strcmp (s->name, d->name) == 0)
+ {
+ d->output_section = s->output_section;
+ d->output_offset = s->output_offset;
+ d->vma = s->vma;
+ }
+ }
+}
+
+/* Unset vmas for adjusted sections in STASH. */
+
+static void
+unset_sections (struct dwarf2_debug *stash)
+{
+ int i;
+ struct adjusted_section *p;
+
+ i = stash->adjusted_section_count;
+ p = stash->adjusted_sections;
+ for (; i > 0; i--, p++)
+ p->section->vma = 0;
+}
+
+/* Set VMAs for allocated and .debug_info sections in ORIG_BFD, a
+ relocatable object file. VMAs are normally all zero in relocatable
+ object files, so if we want to distinguish locations in sections by
+ address we need to set VMAs so the sections do not overlap. We
+ also set VMA on .debug_info so that when we have multiple
+ .debug_info sections (or the linkonce variant) they also do not
+ overlap. The multiple .debug_info sections make up a single
+ logical section. ??? We should probably do the same for other
+ debug sections. */
+
+static bfd_boolean
+place_sections (bfd *orig_bfd, struct dwarf2_debug *stash)
+{
+ bfd *abfd;
+ struct adjusted_section *p;
+ int i;
+ const char *debug_info_name;
+
+ 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;
+ return TRUE;
+ }
+
+ debug_info_name = stash->debug_sections[debug_info].uncompressed_name;
+ i = 0;
+ abfd = orig_bfd;
+ while (1)
+ {
+ asection *sect;
+
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ {
+ int is_debug_info;
+
+ if ((sect->output_section != NULL
+ && sect->output_section != sect
+ && (sect->flags & SEC_DEBUGGING) == 0)
+ || sect->vma != 0)
+ continue;
+
+ is_debug_info = (strcmp (sect->name, debug_info_name) == 0
+ || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO));
+
+ if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd)
+ && !is_debug_info)
+ continue;
+
+ i++;
+ }
+ if (abfd == stash->bfd_ptr)
+ break;
+ abfd = stash->bfd_ptr;
+ }
+
+ if (i <= 1)
+ stash->adjusted_section_count = -1;
+ else
+ {
+ bfd_vma last_vma = 0, last_dwarf = 0;
+ bfd_size_type amt = i * sizeof (struct adjusted_section);
+
+ p = (struct adjusted_section *) bfd_malloc (amt);
+ if (p == NULL)
+ return FALSE;
+
+ stash->adjusted_sections = p;
+ stash->adjusted_section_count = i;
+
+ abfd = orig_bfd;
+ while (1)
+ {
+ asection *sect;
+
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ {
+ bfd_size_type sz;
+ int is_debug_info;
+
+ if ((sect->output_section != NULL
+ && sect->output_section != sect
+ && (sect->flags & SEC_DEBUGGING) == 0)
+ || sect->vma != 0)
+ continue;
+
+ is_debug_info = (strcmp (sect->name, debug_info_name) == 0
+ || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO));
+
+ if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd)
+ && !is_debug_info)
+ continue;
+
+ sz = sect->rawsize ? sect->rawsize : sect->size;
+
+ if (is_debug_info)
+ {
+ BFD_ASSERT (sect->alignment_power == 0);
+ sect->vma = last_dwarf;
+ last_dwarf += sz;
+ }
+ else
+ {
+ /* 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 += sz;
+ }
+
+ p->section = sect;
+ p->adj_vma = sect->vma;
+ p++;
+ }
+ if (abfd == stash->bfd_ptr)
+ break;
+ abfd = stash->bfd_ptr;
+ }
+ }
+
+ if (orig_bfd != stash->bfd_ptr)
+ set_debug_vma (orig_bfd, stash->bfd_ptr);
+
+ 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;
+ bfd_vma best_fit_len = 0;
+ 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 = (struct funcinfo *) 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_len))
+ {
+ best_fit = each_func;
+ best_fit_len = arange->high - arange->low;
+ }
+ }
+ }
+
+ 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 = (struct varinfo *) 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);
+}
+
+/* Save current section VMAs. */
+
+static bfd_boolean
+save_section_vma (const bfd *abfd, struct dwarf2_debug *stash)
+{
+ asection *s;
+ unsigned int i;
+
+ if (abfd->section_count == 0)
+ return TRUE;
+ stash->sec_vma = bfd_malloc (sizeof (*stash->sec_vma) * abfd->section_count);
+ if (stash->sec_vma == NULL)
+ return FALSE;
+ for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
+ {
+ if (s->output_section != NULL)
+ stash->sec_vma[i] = s->output_section->vma + s->output_offset;
+ else
+ stash->sec_vma[i] = s->vma;
+ }
+ return TRUE;
+}
+
+/* Compare current section VMAs against those at the time the stash
+ was created. If find_nearest_line is used in linker warnings or
+ errors early in the link process, the debug info stash will be
+ invalid for later calls. This is because we relocate debug info
+ sections, so the stashed section contents depend on symbol values,
+ which in turn depend on section VMAs. */
+
+static bfd_boolean
+section_vma_same (const bfd *abfd, const struct dwarf2_debug *stash)
+{
+ asection *s;
+ unsigned int i;
+
+ for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
+ {
+ bfd_vma vma;
+
+ if (s->output_section != NULL)
+ vma = s->output_section->vma + s->output_offset;
+ else
+ vma = s->vma;
+ if (vma != stash->sec_vma[i])
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Read debug information from DEBUG_BFD when DEBUG_BFD is specified.
+ If DEBUG_BFD is not specified, we read debug information from ABFD
+ or its gnu_debuglink. The results will be stored in PINFO.
+ The function returns TRUE iff debug information is ready. */
+
+bfd_boolean
+_bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd,
+ const struct dwarf_debug_section *debug_sections,
+ asymbol **symbols,
+ void **pinfo,
+ bfd_boolean do_place)
+{
+ bfd_size_type amt = sizeof (struct dwarf2_debug);
+ bfd_size_type total_size;
+ asection *msec;
+ struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo;
+
+ if (stash != NULL)
+ {
+ if (section_vma_same (abfd, stash))
+ return TRUE;
+ _bfd_dwarf2_cleanup_debug_info (abfd, pinfo);
+ memset (stash, 0, amt);
+ }
+ else
+ {
+ stash = (struct dwarf2_debug *) bfd_zalloc (abfd, amt);
+ if (! stash)
+ return FALSE;
+ }
+ stash->debug_sections = debug_sections;
+ stash->syms = symbols;
+ if (!save_section_vma (abfd, stash))
+ return FALSE;
+
+ *pinfo = stash;
+
+ if (debug_bfd == NULL)
+ debug_bfd = abfd;
+
+ msec = find_debug_info (debug_bfd, debug_sections, NULL);
+ if (msec == NULL && abfd == debug_bfd)
+ {
+ 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. */
+ return FALSE;
+
+ /* Set BFD_DECOMPRESS to decompress debug sections. */
+ if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
+ || !(debug_bfd->flags |= BFD_DECOMPRESS,
+ bfd_check_format (debug_bfd, bfd_object))
+ || (msec = find_debug_info (debug_bfd,
+ debug_sections, NULL)) == NULL
+ || !bfd_generic_link_read_symbols (debug_bfd))
+ {
+ if (debug_bfd)
+ bfd_close (debug_bfd);
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ free (debug_filename);
+ return FALSE;
+ }
+
+ symbols = bfd_get_outsymbols (debug_bfd);
+ stash->syms = symbols;
+ stash->close_on_cleanup = TRUE;
+ }
+ stash->bfd_ptr = debug_bfd;
+
+ if (do_place
+ && !place_sections (abfd, stash))
+ return FALSE;
+
+ /* 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, debug_sections, msec))
+ {
+ /* Case 1: only one info section. */
+ total_size = msec->size;
+ if (! read_section (debug_bfd, &stash->debug_sections[debug_info],
+ symbols, 0,
+ &stash->info_ptr_memory, &total_size))
+ return FALSE;
+ }
+ else
+ {
+ /* Case 2: multiple sections. */
+ for (total_size = 0;
+ msec;
+ msec = find_debug_info (debug_bfd, debug_sections, msec))
+ total_size += msec->size;
+
+ stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size);
+ if (stash->info_ptr_memory == NULL)
+ return FALSE;
+
+ total_size = 0;
+ for (msec = find_debug_info (debug_bfd, debug_sections, NULL);
+ msec;
+ msec = find_debug_info (debug_bfd, debug_sections, msec))
+ {
+ bfd_size_type size;
+
+ size = msec->size;
+ if (size == 0)
+ continue;
+
+ if (!(bfd_simple_get_relocated_section_contents
+ (debug_bfd, msec, stash->info_ptr_memory + total_size,
+ symbols)))
+ return FALSE;
+
+ total_size += size;
+ }
+ }
+
+ stash->info_ptr = stash->info_ptr_memory;
+ stash->info_ptr_end = stash->info_ptr + total_size;
+ stash->sec = find_debug_info (debug_bfd, debug_sections, NULL);
+ stash->sec_info_ptr = stash->info_ptr;
+ return TRUE;
+}
+
+/* Scan the debug information in PINFO looking for a DW_TAG_subprogram
+ abbrev with a DW_AT_low_pc attached to it. Then lookup that same
+ symbol in SYMBOLS and return the difference between the low_pc and
+ the symbol's address. Returns 0 if no suitable symbol could be found. */
+
+bfd_signed_vma
+_bfd_dwarf2_find_symbol_bias (asymbol ** symbols, void ** pinfo)
+{
+ struct dwarf2_debug *stash;
+ struct comp_unit * unit;
+
+ stash = (struct dwarf2_debug *) *pinfo;
+
+ if (stash == NULL)
+ return 0;
+
+ for (unit = stash->all_comp_units; unit; unit = unit->next_unit)
+ {
+ struct funcinfo * func;
+
+ if (unit->function_table == NULL)
+ {
+ if (unit->line_table == NULL)
+ unit->line_table = decode_line_info (unit, stash);
+ if (unit->line_table != NULL)
+ scan_unit_for_symbols (unit);
+ }
+
+ for (func = unit->function_table; func != NULL; func = func->prev_func)
+ if (func->name && func->arange.low)
+ {
+ asymbol ** psym;
+
+ /* FIXME: Do we need to scan the aranges looking for the lowest pc value ? */
+
+ for (psym = symbols; * psym != NULL; psym++)
+ {
+ asymbol * sym = * psym;
+
+ if (sym->flags & BSF_FUNCTION
+ && sym->section != NULL
+ && strcmp (sym->name, func->name) == 0)
+ return ((bfd_signed_vma) func->arange.low) -
+ ((bfd_signed_vma) (sym->value + sym->section->vma));
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* 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.
+ DEBUG_SECTIONS contains the name of the dwarf debug sections.
+ 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. */
+
+bfd_boolean
+_bfd_dwarf2_find_nearest_line (bfd *abfd,
+ asymbol **symbols,
+ asymbol *symbol,
+ asection *section,
+ bfd_vma offset,
+ const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *linenumber_ptr,
+ unsigned int *discriminator_ptr,
+ const struct dwarf_debug_section *debug_sections,
+ 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;
+ struct funcinfo *function = NULL;
+ bfd_boolean found = FALSE;
+ bfd_boolean do_line;
+
+ *filename_ptr = NULL;
+ if (functionname_ptr != NULL)
+ *functionname_ptr = NULL;
+ *linenumber_ptr = 0;
+ if (discriminator_ptr)
+ *discriminator_ptr = 0;
+
+ if (! _bfd_dwarf2_slurp_debug_info (abfd, NULL, debug_sections,
+ symbols, pinfo,
+ (abfd->flags & (EXEC_P | DYNAMIC)) == 0))
+ return FALSE;
+
+ stash = (struct dwarf2_debug *) *pinfo;
+
+ do_line = symbol != NULL;
+ if (do_line)
+ {
+ BFD_ASSERT (section == NULL && offset == 0 && functionname_ptr == NULL);
+ section = bfd_get_section (symbol);
+ addr = symbol->value;
+ }
+ else
+ {
+ BFD_ASSERT (section != NULL && functionname_ptr != NULL);
+ addr = offset;
+ }
+
+ if (section->output_section)
+ addr += section->output_section->vma + section->output_offset;
+ else
+ addr += section->vma;
+
+ /* 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;
+
+ stash->inliner_chain = NULL;
+
+ /* Check the previously read comp. units first. */
+ 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
+ || each->arange.high == 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
+ {
+ bfd_vma min_range = (bfd_vma) -1;
+ const char * local_filename = NULL;
+ struct funcinfo *local_function = NULL;
+ unsigned int local_linenumber = 0;
+ unsigned int local_discriminator = 0;
+
+ for (each = stash->all_comp_units; each; each = each->next_unit)
+ {
+ bfd_vma range = (bfd_vma) -1;
+
+ found = ((each->arange.high == 0
+ || comp_unit_contains_address (each, addr))
+ && (range = comp_unit_find_nearest_line (each, addr,
+ & local_filename,
+ & local_function,
+ & local_linenumber,
+ & local_discriminator,
+ stash)) != 0);
+ if (found)
+ {
+ /* PRs 15935 15994: Bogus debug information may have provided us
+ with an erroneous match. We attempt to counter this by
+ selecting the match that has the smallest address range
+ associated with it. (We are assuming that corrupt debug info
+ will tend to result in extra large address ranges rather than
+ extra small ranges).
+
+ This does mean that we scan through all of the CUs associated
+ with the bfd each time this function is called. But this does
+ have the benefit of producing consistent results every time the
+ function is called. */
+ if (range <= min_range)
+ {
+ if (filename_ptr && local_filename)
+ * filename_ptr = local_filename;
+ if (local_function)
+ function = local_function;
+ if (discriminator_ptr && local_discriminator)
+ * discriminator_ptr = local_discriminator;
+ if (local_linenumber)
+ * linenumber_ptr = local_linenumber;
+ min_range = range;
+ }
+ }
+ }
+
+ if (* linenumber_ptr)
+ {
+ found = TRUE;
+ 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;
+ unsigned int offset_size = addr_size;
+ bfd_byte *info_ptr_unit = stash->info_ptr;
+
+ length = read_4_bytes (stash->bfd_ptr, stash->info_ptr, stash->info_ptr_end);
+ /* 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 (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end);
+ 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 (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end);
+ stash->info_ptr += 8;
+ }
+ /* 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)
+ {
+ offset_size = 4;
+ stash->info_ptr += 4;
+ }
+ else
+ stash->info_ptr += 4;
+
+ if (length > 0)
+ {
+ bfd_byte * new_ptr;
+
+ 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;
+
+ new_ptr = stash->info_ptr + length;
+ /* PR 17512: file: 1500698c. */
+ if (new_ptr < stash->info_ptr)
+ {
+ /* A corrupt length value - do not trust the info any more. */
+ found = FALSE;
+ break;
+ }
+ else
+ stash->info_ptr = new_ptr;
+
+ 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,
+ &function,
+ linenumber_ptr,
+ discriminator_ptr,
+ stash) != 0);
+
+ if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
+ == stash->sec->size)
+ {
+ stash->sec = find_debug_info (stash->bfd_ptr, debug_sections,
+ stash->sec);
+ stash->sec_info_ptr = stash->info_ptr;
+ }
+
+ if (found)
+ goto done;
+ }
+ }
+
+ done:
+ if (function)
+ {
+ if (!function->is_linkage)
+ {
+ asymbol *fun;
+ bfd_vma sec_vma;
+
+ fun = _bfd_elf_find_function (abfd, symbols, section, offset,
+ *filename_ptr ? NULL : filename_ptr,
+ functionname_ptr);
+ sec_vma = section->vma;
+ if (section->output_section != NULL)
+ sec_vma = section->output_section->vma + section->output_offset;
+ if (fun != NULL
+ && fun->value + sec_vma == function->arange.low)
+ function->name = *functionname_ptr;
+ /* Even if we didn't find a linkage name, say that we have
+ to stop a repeated search of symbols. */
+ function->is_linkage = TRUE;
+ }
+ *functionname_ptr = function->name;
+ }
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ unset_sections (stash);
+
+ return found;
+}
+
+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 = (struct dwarf2_debug *) *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, void **pinfo)
+{
+ struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo;
+ struct comp_unit *each;
+
+ if (abfd == NULL || 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)
+ {
+ 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;
+ }
+ }
+
+ 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);
+ if (stash->close_on_cleanup)
+ bfd_close (stash->bfd_ptr);
+ if (stash->alt_dwarf_str_buffer)
+ free (stash->alt_dwarf_str_buffer);
+ if (stash->alt_dwarf_info_buffer)
+ free (stash->alt_dwarf_info_buffer);
+ if (stash->sec_vma)
+ free (stash->sec_vma);
+ if (stash->adjusted_sections)
+ free (stash->adjusted_sections);
+ if (stash->alt_bfd_ptr)
+ bfd_close (stash->alt_bfd_ptr);
+}
+
+/* Find the function to a particular section and offset,
+ for error reporting. */
+
+asymbol *
+_bfd_elf_find_function (bfd *abfd,
+ asymbol **symbols,
+ asection *section,
+ bfd_vma offset,
+ const char **filename_ptr,
+ const char **functionname_ptr)
+{
+ struct elf_find_function_cache
+ {
+ asection *last_section;
+ asymbol *func;
+ const char *filename;
+ bfd_size_type func_size;
+ } *cache;
+
+ if (symbols == NULL)
+ return NULL;
+
+ if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ return NULL;
+
+ cache = elf_tdata (abfd)->elf_find_function_cache;
+ if (cache == NULL)
+ {
+ cache = bfd_zalloc (abfd, sizeof (*cache));
+ elf_tdata (abfd)->elf_find_function_cache = cache;
+ if (cache == NULL)
+ return NULL;
+ }
+ if (cache->last_section != section
+ || cache->func == NULL
+ || offset < cache->func->value
+ || offset >= cache->func->value + cache->func_size)
+ {
+ asymbol *file;
+ bfd_vma low_func;
+ asymbol **p;
+ /* ??? Given multiple file symbols, it is impossible to reliably
+ choose the right file name for global symbols. File symbols are
+ local symbols, and thus all file symbols must sort before any
+ global symbols. The ELF spec may be interpreted to say that a
+ file symbol must sort before other local symbols, but currently
+ ld -r doesn't do this. So, for ld -r output, it is possible to
+ make a better choice of file name for local symbols by ignoring
+ file symbols appearing after a given local symbol. */
+ enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ file = NULL;
+ low_func = 0;
+ state = nothing_seen;
+ cache->filename = NULL;
+ cache->func = NULL;
+ cache->func_size = 0;
+ cache->last_section = section;
+
+ for (p = symbols; *p != NULL; p++)
+ {
+ asymbol *sym = *p;
+ bfd_vma code_off;
+ bfd_size_type size;
+
+ if ((sym->flags & BSF_FILE) != 0)
+ {
+ file = sym;
+ if (state == symbol_seen)
+ state = file_after_symbol_seen;
+ continue;
+ }
+
+ size = bed->maybe_function_sym (sym, section, &code_off);
+ if (size != 0
+ && code_off <= offset
+ && (code_off > low_func
+ || (code_off == low_func
+ && size > cache->func_size)))
+ {
+ cache->func = sym;
+ cache->func_size = size;
+ cache->filename = NULL;
+ low_func = code_off;
+ if (file != NULL
+ && ((sym->flags & BSF_LOCAL) != 0
+ || state != file_after_symbol_seen))
+ cache->filename = bfd_asymbol_name (file);
+ }
+ if (state == nothing_seen)
+ state = symbol_seen;
+ }
+ }
+
+ if (cache->func == NULL)
+ return NULL;
+
+ if (filename_ptr)
+ *filename_ptr = cache->filename;
+ if (functionname_ptr)
+ *functionname_ptr = bfd_asymbol_name (cache->func);
+
+ return cache->func;
+}
projects / deliverable / binutils-gdb.git / blobdiff