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PR symtab/17890 

gdb/ChangeLog:

	PR symtab/17890
	* dwarf2read.c (dwarf_decode_line_header): Punt if version > 4.
This commit is contained in:
Doug Evans 2015-01-29 10:26:38 -08:00
parent fa89cc82f5
commit cd366ee8c6
2 changed files with 15 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2015-01-29 Doug Evans <dje@google.com>
PR symtab/17890
* dwarf2read.c (dwarf_decode_line_header): Punt if version > 4.
2015-01-25 Mark Wielaard <mjw@redhat.com> 2015-01-25 Mark Wielaard <mjw@redhat.com>
* dwarf2read.c (checkproducer): Call producer_is_gcc. * dwarf2read.c (checkproducer): Call producer_is_gcc.

10
gdb/dwarf2read.c
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@ -17136,6 +17136,8 @@ get_debug_line_section (struct dwarf2_cu *cu)
/* Read the statement program header starting at OFFSET in /* Read the statement program header starting at OFFSET in
.debug_line, or .debug_line.dwo. Return a pointer .debug_line, or .debug_line.dwo. Return a pointer
to a struct line_header, allocated using xmalloc. to a struct line_header, allocated using xmalloc.
Returns NULL if there is a problem reading the header, e.g., if it
has a version we don't understand.
NOTE: the strings in the include directory and file name tables of NOTE: the strings in the include directory and file name tables of
the returned object point into the dwarf line section buffer, the returned object point into the dwarf line section buffer,
@ -17200,6 +17202,14 @@ dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
lh->statement_program_end = line_ptr + lh->total_length; lh->statement_program_end = line_ptr + lh->total_length;
lh->version = read_2_bytes (abfd, line_ptr); lh->version = read_2_bytes (abfd, line_ptr);
line_ptr += 2; line_ptr += 2;
if (lh->version > 4)
{
/* This is a version we don't understand. The format could have
changed in ways we don't handle properly so just punt. */
complaint (&symfile_complaints,
_("unsupported version in .debug_line section"));
return NULL;
}
lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
line_ptr += offset_size; line_ptr += offset_size;
lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);