https://sourceware.org/bugzilla/show_bug.cgi?id=19827
Bug ID: 19827
Summary: Wrong relocation with linker-defined symbol in PIE
Product: binutils
Version: 2.26
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-6 pr19807b]$ cat x.s
.text
.global _start
_start:
.dc.a _bss
[hjl@gnu-6 pr19807b]$ cat x.t
_bss = .;
[hjl@gnu-6 pr19807b]$ make
as --32 -o x.o x.s
./ld.2.26 -pie -m elf_i386 -T x.t x.o -o x
./ld.2.26 -shared -Bsymbolic -m elf_i386 -T x.t x.o -o y
readelf -r --dyn-syms --wide x
Relocation section '.rel.dyn' at offset 0x1054 contains 1 entries:
Offset Info Type Sym. Value Symbol's Name
00000000 00000101 R_386_32 00000000 _bss
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This should be R_386_RELATIVE, the same as -shared -Bsymbolic.
Symbol table '.dynsym' contains 2 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 NOTYPE GLOBAL DEFAULT 1 _bss
readelf -r --dyn-syms --wide y
Relocation section '.rel.dyn' at offset 0x105c contains 1 entries:
Offset Info Type Sym. Value Symbol's Name
00000000 00000008 R_386_RELATIVE
Symbol table '.dynsym' contains 3 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 NOTYPE GLOBAL DEFAULT 1 _bss
2: 00000000 0 NOTYPE GLOBAL DEFAULT 1 _start
[hjl@gnu-6 pr19807b]$
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