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PR22186, divide-by-zero in decode_line_info
- From: Alan Modra <amodra at gmail dot com>
- To: binutils at sourceware dot org
- Date: Sun, 24 Sep 2017 16:16:17 +0930
- Subject: PR22186, divide-by-zero in decode_line_info
- Authentication-results: sourceware.org; auth=none
PR 22186
* dwarf2.c (decode_line_info): Fail on lh.line_range of zero
rather than dividing by zero.
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 89a3f9b..8b2281e 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -2437,6 +2437,8 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
case DW_LNS_set_basic_block:
break;
case DW_LNS_const_add_pc:
+ if (lh.line_range == 0)
+ goto line_fail;
if (lh.maximum_ops_per_insn == 1)
address += (lh.minimum_instruction_length
* ((255 - lh.opcode_base) / lh.line_range));
--
Alan Modra
Australia Development Lab, IBM