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Fix linker segfault that occured when linking ia64-linux kernel.

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* dwarf2.c (struct dwarf2_debug): New field dwarf_line_size.
	(decode_line_info): Set it.  Report error if unit->line_offset is
	equal to or larger than it.
This commit is contained in:
Jim Wilson 2000-04-07 18:36:04 +00:00
parent 291dcb3e0d
commit ccdb16fc41
2 changed files with 23 additions and 4 deletions
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6
bfd/ChangeLog
View file

@ -1,3 +1,9 @@
Fri Apr 7 11:33:47 2000 Jim Wilson <wilson@cygnus.com>
* dwarf2.c (struct dwarf2_debug): New field dwarf_line_size.
(decode_line_info): Set it. Report error if unit->line_offset is
equal to or larger than it.
2000-04-07 Timothy Wall <twall@cygnus.com>
* targets.c: Added vecs for tic54x.

21
bfd/dwarf2.c
View file

@ -102,6 +102,9 @@ struct dwarf2_debug {
/* Buffer for decode_line_info. */
char *dwarf_line_buffer;
/* Length of the loaded .debug_line section. */
unsigned long dwarf_line_size;
};
struct arange {
@ -783,7 +786,6 @@ decode_line_info (unit)
if (! stash->dwarf_line_buffer)
{
asection *msec;
unsigned long size;
msec = bfd_get_section_by_name (abfd, ".debug_line");
if (! msec)
@ -793,20 +795,31 @@ decode_line_info (unit)
return 0;
}
size = msec->_raw_size;
stash->dwarf_line_buffer = (char *) bfd_alloc (abfd, size);
stash->dwarf_line_size = msec->_raw_size;
stash->dwarf_line_buffer = (char *) bfd_alloc (abfd, stash->dwarf_line_size);
if (! stash->dwarf_line_buffer)
return 0;
if (! bfd_get_section_contents (abfd, msec,
stash->dwarf_line_buffer, 0,
size))
stash->dwarf_line_size))
return 0;
/* FIXME: We ought to apply the relocs against this section before
we process it.... */
}
/* Since we are using un-relocated data, it is possible to get a bad value
for the line_offset. Validate it here so that we won't get a segfault
below. */
if (unit->line_offset >= stash->dwarf_line_size)
{
(*_bfd_error_handler) (_("Dwarf Error: Line offset (%u) bigger than line size (%u)."),
unit->line_offset, stash->dwarf_line_size);
bfd_set_error (bfd_error_bad_value);
return 0;
}
table = (struct line_info_table*) bfd_alloc (abfd,
sizeof (struct line_info_table));
table->abfd = abfd;