http://sourceware.org/bugzilla/show_bug.cgi?id=13947
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-12 00:33:30
UTC ---
The problem is strip removes relocation while keeping
an empty relocation section:
[hjl@gnu-6 pr13947]$ cat foo.s
.text
.globl _start
_start:
.dc.a foo
.data
.globl foo
foo:
.byte 20
[hjl@gnu-6 pr13947]$ gcc -c foo.s
[hjl@gnu-6 pr13947]$ readelf -r foo.o
Relocation section '.rela.text' at offset 0x320 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000000 000500000001 R_X86_64_64 0000000000000000 foo + 0
[hjl@gnu-6 pr13947]$ strip foo.o
[hjl@gnu-6 pr13947]$ readelf -rS foo.o
There are 6 section headers, starting at offset 0x70:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .text PROGBITS 0000000000000000 00000040
0000000000000008 0000000000000000 AX 0 0 4
[ 2] .rela.text RELA 0000000000000000 000001f0
0000000000000000 0000000000000018 0 1 8
[ 3] .data PROGBITS 0000000000000000 00000048
0000000000000001 0000000000000000 WA 0 0 4
[ 4] .bss NOBITS 0000000000000000 0000004c
0000000000000000 0000000000000000 WA 0 0 4
[ 5] .shstrtab STRTAB 0000000000000000 0000004c
0000000000000021 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
There are no relocations in this file.
[hjl@gnu-6 pr13947]$
The empty relocation section confuses strip when mapping sections
to segments.
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