/* dwarf.c -- display DWARF contents of a BFD binary file
- Copyright 2005, 2006
+ Copyright 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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,
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
-#include <stdio.h>
-
-#include "dwarf.h"
-
-#include "bucomm.h"
+#include "sysdep.h"
#include "libiberty.h"
+#include "bfd.h"
+#include "bucomm.h"
+#include "elf/dwarf2.h"
+#include "dwarf.h"
static int have_frame_base;
static int need_base_address;
Returns the number of bytes read. */
static int
-process_extended_line_op (unsigned char *data, int is_stmt, int pointer_size)
+process_extended_line_op (unsigned char *data, int is_stmt)
{
unsigned char op_code;
unsigned int bytes_read;
break;
case DW_LNE_set_address:
- adr = byte_get (data, pointer_size);
+ adr = byte_get (data, len - bytes_read - 1);
printf (_("set Address to 0x%lx\n"), adr);
state_machine_regs.address = adr;
break;
case DW_OP_call_ref:
printf ("DW_OP_call_ref");
break;
+ case DW_OP_form_tls_address:
+ printf ("DW_OP_form_tls_address");
+ break;
/* GNU extensions. */
case DW_OP_GNU_push_tls_address:
case DW_AT_language:
switch (uvalue)
{
- case DW_LANG_C: printf ("(non-ANSI C)"); break;
+ /* Ordered by the numeric value of these constants. */
case DW_LANG_C89: printf ("(ANSI C)"); break;
+ case DW_LANG_C: printf ("(non-ANSI C)"); break;
+ case DW_LANG_Ada83: printf ("(Ada)"); break;
case DW_LANG_C_plus_plus: printf ("(C++)"); break;
+ case DW_LANG_Cobol74: printf ("(Cobol 74)"); break;
+ case DW_LANG_Cobol85: printf ("(Cobol 85)"); break;
case DW_LANG_Fortran77: printf ("(FORTRAN 77)"); break;
case DW_LANG_Fortran90: printf ("(Fortran 90)"); break;
- case DW_LANG_Modula2: printf ("(Modula 2)"); break;
case DW_LANG_Pascal83: printf ("(ANSI Pascal)"); break;
- case DW_LANG_Ada83: printf ("(Ada)"); break;
- case DW_LANG_Cobol74: printf ("(Cobol 74)"); break;
- case DW_LANG_Cobol85: printf ("(Cobol 85)"); break;
+ case DW_LANG_Modula2: printf ("(Modula 2)"); break;
/* DWARF 2.1 values. */
+ case DW_LANG_Java: printf ("(Java)"); break;
case DW_LANG_C99: printf ("(ANSI C99)"); break;
case DW_LANG_Ada95: printf ("(ADA 95)"); break;
case DW_LANG_Fortran95: printf ("(Fortran 95)"); break;
+ /* DWARF 3 values. */
+ case DW_LANG_PLI: printf ("(PLI)"); break;
+ case DW_LANG_ObjC: printf ("(Objective C)"); break;
+ case DW_LANG_ObjC_plus_plus: printf ("(Objective C++)"); break;
+ case DW_LANG_UPC: printf ("(Unified Parallel C)"); break;
+ case DW_LANG_D: printf ("(D)"); break;
/* MIPS extension. */
case DW_LANG_Mips_Assembler: printf ("(MIPS assembler)"); break;
/* UPC extension. */
case DW_LANG_Upc: printf ("(Unified Parallel C)"); break;
default:
- printf ("(Unknown: %lx)", uvalue);
+ if (uvalue >= DW_LANG_lo_user && uvalue <= DW_LANG_hi_user)
+ printf ("(implementation defined: %lx)", uvalue);
+ else
+ printf ("(Unknown: %lx)", uvalue);
break;
}
break;
hdrptr += 2;
cu_offset = start - section_begin;
- start += compunit.cu_length + initial_length_size;
cu_abbrev_offset_ptr = hdrptr;
compunit.cu_abbrev_offset = byte_get (hdrptr, offset_size);
debug_information [unit].num_range_lists = 0;
}
- tags = hdrptr;
-
if (!do_loc)
{
printf (_(" Compilation Unit @ offset 0x%lx:\n"), cu_offset);
printf (_(" Pointer Size: %d\n"), compunit.cu_pointer_size);
}
+ if (cu_offset + compunit.cu_length + initial_length_size
+ > section->size)
+ {
+ warn (_("Debug info is corrupted, length is invalid (section is %lu bytes)\n"),
+ (unsigned long)section->size);
+ break;
+ }
+ tags = hdrptr;
+ start += compunit.cu_length + initial_length_size;
+
if (compunit.cu_version != 2 && compunit.cu_version != 3)
{
warn (_("Only version 2 and 3 DWARF debug information is currently supported.\n"));
/* Process the abbrevs used by this compilation unit. DWARF
sections under Mach-O have non-zero addresses. */
- process_abbrev_section
- ((unsigned char *) debug_displays [abbrev].section.start
- + compunit.cu_abbrev_offset - debug_displays [abbrev].section.address,
- (unsigned char *) debug_displays [abbrev].section.start
- + debug_displays [abbrev].section.size);
+ if (compunit.cu_abbrev_offset >= debug_displays [abbrev].section.size)
+ warn (_("Debug info is corrupted, abbrev offset is invalid (section is %lu bytes)\n"),
+ (unsigned long)debug_displays [abbrev].section.size);
+ else
+ process_abbrev_section
+ ((unsigned char *) debug_displays [abbrev].section.start
+ + compunit.cu_abbrev_offset - debug_displays [abbrev].section.address,
+ (unsigned char *) debug_displays [abbrev].section.start
+ + debug_displays [abbrev].section.size);
level = 0;
while (tags < start)
continue;
}
+ if (!do_loc)
+ printf (_(" <%d><%lx>: Abbrev Number: %lu"),
+ level,
+ (unsigned long) (tags - section_begin
+ - bytes_read),
+ abbrev_number);
+
/* Scan through the abbreviation list until we reach the
correct entry. */
for (entry = first_abbrev;
if (entry == NULL)
{
+ if (!do_loc)
+ {
+ printf ("\n");
+ fflush (stdout);
+ }
warn (_("Unable to locate entry %lu in the abbreviation table\n"),
abbrev_number);
return 0;
}
if (!do_loc)
- printf (_(" <%d><%lx>: Abbrev Number: %lu (%s)\n"),
- level,
- (unsigned long) (tags - section_begin
- - bytes_read),
- abbrev_number,
- get_TAG_name (entry->tag));
+ printf (_(" (%s)\n"), get_TAG_name (entry->tag));
switch (entry->tag)
{
need_base_address = 1;
break;
case DW_TAG_entry_point:
- case DW_TAG_inlined_subroutine:
case DW_TAG_subprogram:
need_base_address = 0;
/* Assuming that there is no DW_AT_frame_base. */
}
for (attr = entry->first_attr; attr; attr = attr->next)
- tags = read_and_display_attr (attr->attribute,
- attr->form,
- tags, cu_offset,
- compunit.cu_pointer_size,
- offset_size,
- compunit.cu_version,
- &debug_information [unit],
- do_loc);
+ {
+ if (! do_loc)
+ /* Show the offset from where the tag was extracted. */
+ printf (" <%2lx>", (unsigned long)(tags - section_begin));
+
+ tags = read_and_display_attr (attr->attribute,
+ attr->form,
+ tags, cu_offset,
+ compunit.cu_pointer_size,
+ offset_size,
+ compunit.cu_version,
+ &debug_information [unit],
+ do_loc);
+ }
if (entry->children)
++level;
return 0;
}
-/* Retrieve the pointer size associated with the given compilation unit.
- Optionally the offset of this unit into the .debug_info section is
- also retutned. If there is no .debug_info section then an error
- message is issued and 0 is returned. If the requested comp unit has
- not been defined in the .debug_info section then a warning message
- is issued and the last know pointer size is returned. This message
- is only issued once per section dumped per file dumped. */
-
-static unsigned int
-get_pointer_size_and_offset_of_comp_unit (unsigned int comp_unit,
- const char * section_name,
- unsigned long * offset_return)
-{
- unsigned long offset = 0;
-
- if (num_debug_info_entries == 0)
- error (_("%s section needs a populated .debug_info section\n"),
- section_name);
-
- else if (comp_unit >= num_debug_info_entries)
- {
- if (!warned_about_missing_comp_units)
- {
- warn (_("%s section has more comp units than .debug_info section\n"),
- section_name);
- warn (_("assuming that the pointer size is %d, from the last comp unit in .debug_info\n\n"),
- last_pointer_size);
- warned_about_missing_comp_units = TRUE;
- }
- }
- else
- {
- last_pointer_size = debug_information [comp_unit].pointer_size;
- offset = debug_information [comp_unit].cu_offset;
- }
-
- if (offset_return != NULL)
- * offset_return = offset;
-
- return last_pointer_size;
-}
-
static int
display_debug_lines (struct dwarf_section *section, void *file)
{
unsigned char *start = section->start;
unsigned char *data = start;
unsigned char *end = start + section->size;
- unsigned int comp_unit = 0;
printf (_("\nDump of debug contents of section %s:\n\n"),
section->name);
unsigned char *standard_opcodes;
unsigned char *end_of_sequence;
unsigned char *hdrptr;
- unsigned int pointer_size;
int initial_length_size;
int offset_size;
int i;
info.li_line_base <<= 24;
info.li_line_base >>= 24;
- /* Get the pointer size from the comp unit associated
- with this block of line number information. */
- pointer_size = get_pointer_size_and_offset_of_comp_unit
- (comp_unit, ".debug_line", NULL);
- comp_unit ++;
-
printf (_(" Length: %ld\n"), info.li_length);
printf (_(" DWARF Version: %d\n"), info.li_version);
printf (_(" Prologue Length: %d\n"), info.li_prologue_length);
printf (_(" Line Base: %d\n"), info.li_line_base);
printf (_(" Line Range: %d\n"), info.li_line_range);
printf (_(" Opcode Base: %d\n"), info.li_opcode_base);
- printf (_(" (Pointer size: %u)%s\n"),
- pointer_size,
- warned_about_missing_comp_units ? " [assumed]" : "" );
end_of_sequence = data + info.li_length + initial_length_size;
else switch (op_code)
{
case DW_LNS_extended_op:
- if (pointer_size == 0)
- {
- warn (_("Extend line ops need a valid pointer size, guessing at 4\n"));
- pointer_size = 4;
- }
-
- data += process_extended_line_op (data, info.li_default_is_stmt,
- pointer_size);
+ data += process_extended_line_op (data, info.li_default_is_stmt);
break;
case DW_LNS_copy:
error (_("No location lists in .debug_info section!\n"));
/* DWARF sections under Mach-O have non-zero addresses. */
- if (debug_information [first].loc_offsets [0] != section->address)
+ if (debug_information [first].num_loc_offsets > 0
+ && debug_information [first].loc_offsets [0] != section->address)
warn (_("Location lists in %s section start at 0x%lx\n"),
section->name, debug_information [first].loc_offsets [0]);
return 1;
}
-
static int
display_debug_info (struct dwarf_section *section, void *file)
{
unsigned char *ranges;
unsigned long length;
unsigned long address;
+ unsigned char address_size;
int excess;
int offset_size;
int initial_length_size;
printf (_(" Pointer Size: %d\n"), arange.ar_pointer_size);
printf (_(" Segment Size: %d\n"), arange.ar_segment_size);
- printf (_("\n Address Length\n"));
+ address_size = arange.ar_pointer_size + arange.ar_segment_size;
+
+ /* The DWARF spec does not require that the address size be a power
+ of two, but we do. This will have to change if we ever encounter
+ an uneven architecture. */
+ if ((address_size & (address_size - 1)) != 0)
+ {
+ warn (_("Pointer size + Segment size is not a power of two.\n"));
+ break;
+ }
+
+ if (address_size > 4)
+ printf (_("\n Address Length\n"));
+ else
+ printf (_("\n Address Length\n"));
ranges = hdrptr;
- /* Must pad to an alignment boundary that is twice the pointer size. */
- excess = (hdrptr - start) % (2 * arange.ar_pointer_size);
+ /* Must pad to an alignment boundary that is twice the address size. */
+ excess = (hdrptr - start) % (2 * address_size);
if (excess)
- ranges += (2 * arange.ar_pointer_size) - excess;
+ ranges += (2 * address_size) - excess;
- for (;;)
- {
- address = byte_get (ranges, arange.ar_pointer_size);
+ start += arange.ar_length + initial_length_size;
- ranges += arange.ar_pointer_size;
+ while (ranges + 2 * address_size <= start)
+ {
+ address = byte_get (ranges, address_size);
- length = byte_get (ranges, arange.ar_pointer_size);
+ ranges += address_size;
- ranges += arange.ar_pointer_size;
+ length = byte_get (ranges, address_size);
- /* A pair of zeros marks the end of the list. */
- if (address == 0 && length == 0)
- break;
+ ranges += address_size;
- printf (" %8.8lx %lu\n", address, length);
+ if (address_size > 4)
+ printf (" 0x%16.16lx 0x%lx\n", address, length);
+ else
+ printf (" 0x%8.8lx 0x%lx\n", address, length);
}
-
- start += arange.ar_length + initial_length_size;
}
printf ("\n");
error (_("No range lists in .debug_info section!\n"));
/* DWARF sections under Mach-O have non-zero addresses. */
- if (debug_information [first].range_lists [0] != section->address)
+ if (debug_information [first].num_range_lists > 0
+ && debug_information [first].range_lists [0] != section->address)
warn (_("Range lists in %s section start at 0x%lx\n"),
section->name, debug_information [first].range_lists [0]);
get_encoded_value (unsigned char *data, int encoding)
{
int size = size_of_encoded_value (encoding);
+
if (encoding & DW_EH_PE_signed)
return byte_get_signed (data, size);
else
{
printf ("\n%08lx ZERO terminator\n\n",
(unsigned long)(saved_start - section_start));
- return 1;
+ continue;
}
if (length == 0xffffffff)
}
block_end = saved_start + length + initial_length_size;
+ if (block_end > end)
+ {
+ warn ("Invalid length %#08lx in FDE at %#08lx\n",
+ length, (unsigned long)(saved_start - section_start));
+ block_end = end;
+ }
cie_id = byte_get (start, offset_size); start += offset_size;
if (is_eh ? (cie_id == 0) : (cie_id == DW_CIE_ID))
if (!cie)
{
- warn ("Invalid CIE pointer %08lx in FDE at %p\n",
- cie_id, saved_start);
- start = block_end;
+ warn ("Invalid CIE pointer %#08lx in FDE at %#08lx\n",
+ cie_id, (unsigned long)(saved_start - section_start));
fc->ncols = 0;
fc->col_type = xmalloc (sizeof (short int));
fc->col_offset = xmalloc (sizeof (int));
break;
default:
- warn (_("unsupported or unknown DW_CFA_%d\n"), op);
+ if (op >= DW_CFA_lo_user && op <= DW_CFA_hi_user)
+ printf (_(" DW_CFA_??? (User defined call frame op: %#x)\n"), op);
+ else
+ warn (_("unsupported or unknown Dwarf Call Frame Instruction number: %#x\n"), op);
start = block_end;
}
}
projects / deliverable / binutils-gdb.git / blobdiff