http://sourceware.org/bugzilla/show_bug.cgi?id=14207
Bug #: 14207
Summary: x86_64 linker can produce a NULL GNU_RELRO segment
Product: binutils
Version: 2.23 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
Created attachment 6438
--> http://sourceware.org/bugzilla/attachment.cgi?id=6438
Test source file
Using the uploaded relro.s source file, try the following using an
x86_64-pc-linux-gnu linker:
% as relro.s -o relro.o
% ld -z relro -z now -shared relro.o
% readelf -l a.out
[snip]
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x00000000000001e0 0x00000000000001e0 R 200000
LOAD 0x0000000000000b88 0x0000000000200b88 0x0000000000200b88
0x0000000000000470 0x0000000000000cb8 RW 200000
DYNAMIC 0x0000000000000bd0 0x0000000000200bd0 0x0000000000200bd0
0x0000000000000180 0x0000000000000180 RW 8
NULL 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0
[snip]
Note how the GNU_RELRO segment has been replaced by an empty segment, and that
no error or warning message was produced.
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