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/[pf3gnuchains]/trunk/bfd/dwarf2.c

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revision 20 by monamour, Thu Dec 4 05:12:56 2008 UTC revision 21 by monamour, Mon Jul 27 20:34:36 2009 UTC
# Line 1  Line 1 
1  /* DWARF 2 support.  /* DWARF 2 support.
2     Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,     Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3     2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.     2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4    
5     Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions     Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
6     (gavin@cygnus.com).     (gavin@cygnus.com).
# Line 35  Line 35 
35  #include "libiberty.h"  #include "libiberty.h"
36  #include "libbfd.h"  #include "libbfd.h"
37  #include "elf-bfd.h"  #include "elf-bfd.h"
38  #include "elf/dwarf2.h"  #include "dwarf2.h"
39    
40  /* The data in the .debug_line statement prologue looks like this.  */  /* The data in the .debug_line statement prologue looks like this.  */
41    
# Line 417  read_section (bfd *           abfd, Line 417  read_section (bfd *           abfd,
417    bfd_boolean section_is_compressed = FALSE;    bfd_boolean section_is_compressed = FALSE;
418    
419    /* read_section is a noop if the section has already been read.  */    /* read_section is a noop if the section has already been read.  */
420    if (*section_buffer)    if (!*section_buffer)
     return TRUE;  
   
   msec = bfd_get_section_by_name (abfd, section_name);  
   if (! msec && compressed_section_name)  
     {  
       msec = bfd_get_section_by_name (abfd, compressed_section_name);  
       section_is_compressed = TRUE;  
     }  
   if (! msec)  
421      {      {
422        (*_bfd_error_handler) (_("Dwarf Error: Can't find %s section."), section_name);        msec = bfd_get_section_by_name (abfd, section_name);
423        bfd_set_error (bfd_error_bad_value);        if (! msec && compressed_section_name)
424        return FALSE;          {
425      }            msec = bfd_get_section_by_name (abfd, compressed_section_name);
426              section_is_compressed = TRUE;
427            }
428          if (! msec)
429            {
430              (*_bfd_error_handler) (_("Dwarf Error: Can't find %s section."), section_name);
431              bfd_set_error (bfd_error_bad_value);
432              return FALSE;
433            }
434    
   if (syms)  
     {  
       *section_size = msec->size;  
       *section_buffer  
           = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, syms);  
       if (! *section_buffer)  
         return FALSE;  
     }  
   else  
     {  
435        *section_size = msec->rawsize ? msec->rawsize : msec->size;        *section_size = msec->rawsize ? msec->rawsize : msec->size;
436        *section_buffer = bfd_malloc (*section_size);        if (syms)
437        if (! *section_buffer)          {
438          return FALSE;            *section_buffer
439        if (! bfd_get_section_contents (abfd, msec, *section_buffer,                = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, syms);
440                                        0, *section_size))            if (! *section_buffer)
441          return FALSE;              return FALSE;
442      }          }
443          else
444            {
445              *section_buffer = bfd_malloc (*section_size);
446              if (! *section_buffer)
447                return FALSE;
448              if (! bfd_get_section_contents (abfd, msec, *section_buffer,
449                                              0, *section_size))
450                return FALSE;
451            }
452    
453    if (section_is_compressed)        if (section_is_compressed)
     {  
       if (! bfd_uncompress_section_contents (section_buffer, section_size))  
454          {          {
455            (*_bfd_error_handler) (_("Dwarf Error: unable to decompress %s section."), compressed_section_name);            if (! bfd_uncompress_section_contents (section_buffer, section_size))
456            bfd_set_error (bfd_error_bad_value);              {
457            return FALSE;                (*_bfd_error_handler) (_("Dwarf Error: unable to decompress %s section."), compressed_section_name);
458                  bfd_set_error (bfd_error_bad_value);
459                  return FALSE;
460                }
461          }          }
462      }      }
463    
# Line 1406  decode_line_info (struct comp_unit *unit Line 1405  decode_line_info (struct comp_unit *unit
1405                    line_ptr += bytes_read;                    line_ptr += bytes_read;
1406                    table->num_files++;                    table->num_files++;
1407                    break;                    break;
1408                    case DW_LNE_set_discriminator:
1409                      (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1410                      line_ptr += bytes_read;
1411                      break;
1412                  default:                  default:
1413                    (*_bfd_error_handler) (_("Dwarf Error: mangled line number section."));                    (*_bfd_error_handler) (_("Dwarf Error: mangled line number section."));
1414                    bfd_set_error (bfd_error_bad_value);                    bfd_set_error (bfd_error_bad_value);
# Line 1803  read_rangelist (struct comp_unit *unit, Line 1806  read_rangelist (struct comp_unit *unit,
1806        bfd_vma low_pc;        bfd_vma low_pc;
1807        bfd_vma high_pc;        bfd_vma high_pc;
1808    
1809        if (unit->addr_size == 4)        low_pc = read_address (unit, ranges_ptr);
1810          {        ranges_ptr += unit->addr_size;
1811            low_pc = read_4_bytes (unit->abfd, ranges_ptr);        high_pc = read_address (unit, ranges_ptr);
1812            ranges_ptr += 4;        ranges_ptr += unit->addr_size;
1813            high_pc = read_4_bytes (unit->abfd, ranges_ptr);  
           ranges_ptr += 4;  
         }  
       else  
         {  
           low_pc = read_8_bytes (unit->abfd, ranges_ptr);  
           ranges_ptr += 8;  
           high_pc = read_8_bytes (unit->abfd, ranges_ptr);  
           ranges_ptr += 8;  
         }  
1814        if (low_pc == 0 && high_pc == 0)        if (low_pc == 0 && high_pc == 0)
1815          break;          break;
1816        if (low_pc == -1UL && high_pc != -1UL)        if (low_pc == -1UL && high_pc != -1UL)
# Line 3189  find_line (bfd *abfd, Line 3183  find_line (bfd *abfd,
3183              break;              break;
3184            stash->info_ptr += length;            stash->info_ptr += length;
3185    
           if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)  
               == stash->sec->size)  
             {  
               stash->sec = find_debug_info (stash->bfd, stash->sec);  
               stash->sec_info_ptr = stash->info_ptr;  
             }  
   
3186            if (stash->all_comp_units)            if (stash->all_comp_units)
3187              stash->all_comp_units->prev_unit = each;              stash->all_comp_units->prev_unit = each;
3188            else            else
# Line 3225  find_line (bfd *abfd, Line 3212  find_line (bfd *abfd,
3212                                                       functionname_ptr,                                                       functionname_ptr,
3213                                                       linenumber_ptr,                                                       linenumber_ptr,
3214                                                       stash));                                                       stash));
3215    
3216              if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
3217                  == stash->sec->size)
3218                {
3219                  stash->sec = find_debug_info (stash->bfd, stash->sec);
3220                  stash->sec_info_ptr = stash->info_ptr;
3221                }
3222    
3223            if (found)            if (found)
3224              goto done;              goto done;
3225          }          }
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