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[Bug dynamic-link/17078] New: error while loading shared libraries: unexpected reloc type 0x0d
- From: "macro at linux-mips dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 23 Jun 2014 02:18:50 +0000
- Subject: [Bug dynamic-link/17078] New: error while loading shared libraries: unexpected reloc type 0x0d
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=17078
Bug ID: 17078
Summary: error while loading shared libraries: unexpected reloc
type 0x0d
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: dynamic-link
Assignee: unassigned at sourceware dot org
Reporter: macro@linux-mips.org
CC: macro@linux-mips.org
Target: arm-linux-gnueabi
All the TLS test cases fail in the prelinker test suite when built with
the use of R_ARM_TLS_DESC relocations, that is with the
`-mtls-dialect=gnu2' GCC option in effect. The following messages are
produced:
./tls1: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls1.sh
./tls2: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls2.sh
./tls3: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls3.sh
./tls4: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls4.sh
./tls5: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls5.sh
./tls6: error while loading shared libraries: unexpected reloc type 0x0d
FAIL: tls6.sh
The reason is the lack of handling for prelinked R_ARM_TLS_DESC
relocations in the dynamic linker.
Borrowing the testcase from bug #17075 it can also be reproduced as
follows:
$ cat libgetfoo.c
int __thread foo;
int
getfoo (void)
{
return foo;
}
$ arm-linux-gnueabi-gcc -mtls-dialect=gnu2 -fPIC -shared
-Wl,-dynamic-linker,.../lib/ld-linux.so.3 -Wl,-rpath,.../lib -Wl,-rpath,$(pwd)
-o libgetfoo.so libgetfoo.c
$ cat getfoo.c
int getfoo (void);
int
main (void)
{
return getfoo ();
}
$ arm-linux-gnueabi-gcc -mtls-dialect=gnu2
-Wl,-dynamic-linker,.../lib/ld-linux.so.3 -Wl,-rpath,.../lib -Wl,-rpath,$(pwd)
-o getfoo -L. -lgetfoo getfoo.c
$ ssh arm-host $(pwd)/getfoo
$ echo $?
0
$ echo .../lib > prelink.conf
$ echo $(pwd) >> prelink.conf
$ arm-linux-gnueabi-prelink -c ./prelink.conf -C ./prelink.cache
--ld-library-path=.../lib:$(pwd) --dynamic-linker=.../lib/ld-linux.so.3 -v
getfoo
Laying out 4 libraries in virtual address space 41000000-50000000
Assigned virtual address space slots for libraries:
.../lib/ld-linux.so.3 41000000-41028954
.../lib/libc.so.6 41030000-4116d588
.../lib/libgcc_s.so.1 41170000-4119832c
$(pwd)/libgetfoo.so 411a0000-411a8910
Prelinking .../lib/ld-2.19.90.so
Prelinking .../lib/libc-2.19.90.so
Prelinking .../lib/libgcc_s.so.1
Prelinking $(pwd)/libgetfoo.so
Prelinking $(pwd)/getfoo
$ ssh arm-host $(pwd)/getfoo
$(pwd)/getfoo: error while loading shared libraries: unexpected reloc type 0x0d
$ echo $?
127
$
I have substituted `...' for the sysroot path and $(pwd) for the CWD even
in output to avoid clutter.
The ARM TLS descriptor specification can be referred at bug #17075.
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