https://sourceware.org/bugzilla/show_bug.cgi?id=23321
Bug ID: 23321
Summary: Gold Linker SIGSEGV During DWARF Decoding, because it
doesn't support DW_LNS_set_epilogue_begin/end and
DW_LNS_set_isa
Product: binutils
Version: 2.30
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gold
Assignee: ccoutant at gmail dot com
Reporter: twoh at fb dot com
CC: ian at airs dot com
Target Milestone: ---
As written in the summary, gold linker crashes with SIGSEGV because dwarf
reader doesn't support some opcodes. Below is my temporary patch for 2.26.1 and
2.29.1, and I confirmed that the issue is not addressed in 2.30 as well.
It would be nice if someone has a better understanding about the codebase can
take a look. Thanks!
---
===================================================================
--- 2.26.1/src/binutils-2.26.1/gold/dwarf_reader.cc
+++ 2.26.1/src/binutils-2.26.1/gold/dwarf_reader.cc
@@ -1917,6 +1917,20 @@
}
break;
+ case elfcpp::DW_LNS_set_epilogue_begin:
+ case elfcpp::DW_LNS_set_prologue_end:
+ // Do nothing.
+ break;
+
+ case elfcpp::DW_LNS_set_isa:
+ {
+ size_t templen;
+ read_unsigned_LEB_128(start, &templen);
+ oplen += templen;
+ }
+ break;
+
default:
{
// Ignore unknown opcode silently
Index: 2.29.1/src/binutils-2.29.1/gold/dwarf_reader.cc
===================================================================
--- 2.29.1/src/binutils-2.29.1/gold/dwarf_reader.cc
+++ 2.29.1/src/binutils-2.29.1/gold/dwarf_reader.cc
@@ -1917,6 +1917,20 @@
}
break;
+ case elfcpp::DW_LNS_set_epilogue_begin:
+ case elfcpp::DW_LNS_set_prologue_end:
+ // Do nothing.
+ break;
+
+ case elfcpp::DW_LNS_set_isa:
+ {
+ size_t templen;
+ read_unsigned_LEB_128(start, &templen);
+ oplen += templen;
+ }
+ break;
+
default:
{
// Ignore unknown opcode silently
--
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