------- Additional Comments From hjl at lucon dot org 2006-08-14 23:20 -------
A testcase to show that -z relro may create PT_NULL segment:
[EMAIL PROTECTED] tmp]$ cat x.s
.globl main
.globl start
.globl _start
.globl __start
.text
main:
start:
_start:
__start:
.long 0
[EMAIL PROTECTED] tmp]$ gcc -c x.s
[EMAIL PROTECTED] tmp]$ ld -z relro x.o
[EMAIL PROTECTED] tmp]$ readelf -l a.out
Elf file type is EXEC (Executable file)
Entry point 0x4000b0
There are 2 program headers, starting at offset 64
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000000000 0x0000000000400000 0x0000000000400000
0x00000000000000b4 0x00000000000000b4 R E 200000
NULL 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0
Section to Segment mapping:
Segment Sections...
00 .text
01
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl at lucon dot org
Summary|-z relro by default causes |-z relro may create PT_NULL
|testsuite failures |segment
http://sourceware.org/bugzilla/show_bug.cgi?id=3015
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