https://sourceware.org/bugzilla/show_bug.cgi?id=33722
Bug ID: 33722
Summary: aarch64 ld mentions .data and .init as local symbols
in .dynsym
Product: binutils
Version: 2.44
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: amonakov at gmail dot com
Target Milestone: ---
Target: aarch64-*-*
echo 'int i;' > t.c
gcc -shared -o t.so t.c
readelf --dyn-sym t.so
Symbol table '.dynsym' contains 8 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000408 0 SECTION LOCAL DEFAULT 7 .init
2: 0000000000020010 0 SECTION LOCAL DEFAULT 18 .data
3: 0000000000000000 0 NOTYPE WEAK DEFAULT UND __cxa_finalize
4: 0000000000000000 0 NOTYPE WEAK DEFAULT UND
_ITM_registerTMC[...]
5: 0000000000000000 0 NOTYPE WEAK DEFAULT UND
_ITM_deregisterT[...]
6: 0000000000000000 0 NOTYPE WEAK DEFAULT UND __gmon_start__
7: 000000000002001c 4 OBJECT GLOBAL DEFAULT 19 i
Note how .init and .data are mentioned in dynamic symbol table for no apparent
reason. Other linkers do not produce them, and on other targets (x86, ppc) this
is not observed either (although crti.o and other files are be different
there).
For a reduced example, linking crti.o alone is sufficient:
ld -shared -o t.so /usr/lib/aarch64-linux-gnu/crti.o
readelf --dyn-sym t.so
Symbol table '.dynsym' contains 3 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000270 0 SECTION LOCAL DEFAULT 6 .init
2: 0000000000000000 0 NOTYPE WEAK DEFAULT UND __gmon_start__
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