6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jens Remus jremus@linux.ibm.com
[ Upstream commit 14be4e6f35221c4731b004553ecf7cbc6dc1d2d8 ]
The vDSO self tests fail on s390x for a vDSO linked with the GNU linker ld as follows:
# ./vdso_test_gettimeofday Floating point exception (core dumped)
On s390x the ELF hash table entries are 64 bits instead of 32 bits in size (see Glibc sysdeps/unix/sysv/linux/s390/bits/elfclass.h).
Fixes: 40723419f407 ("kselftest: Enable vDSO test on non x86 platforms") Reported-by: Heiko Carstens hca@linux.ibm.com Tested-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Jens Remus jremus@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Jason A. Donenfeld Jason@zx2c4.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/vDSO/parse_vdso.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/vDSO/parse_vdso.c b/tools/testing/selftests/vDSO/parse_vdso.c index d9ccc5acac182..7dd5668ea8a6e 100644 --- a/tools/testing/selftests/vDSO/parse_vdso.c +++ b/tools/testing/selftests/vDSO/parse_vdso.c @@ -36,6 +36,12 @@ #define ELF_BITS_XFORM(bits, x) ELF_BITS_XFORM2(bits, x) #define ELF(x) ELF_BITS_XFORM(ELF_BITS, x)
+#ifdef __s390x__ +#define ELF_HASH_ENTRY ELF(Xword) +#else +#define ELF_HASH_ENTRY ELF(Word) +#endif + static struct vdso_info { bool valid; @@ -47,8 +53,8 @@ static struct vdso_info /* Symbol table */ ELF(Sym) *symtab; const char *symstrings; - ELF(Word) *bucket, *chain; - ELF(Word) nbucket, nchain; + ELF_HASH_ENTRY *bucket, *chain; + ELF_HASH_ENTRY nbucket, nchain;
/* Version table */ ELF(Versym) *versym; @@ -115,7 +121,7 @@ void vdso_init_from_sysinfo_ehdr(uintptr_t base) /* * Fish out the useful bits of the dynamic table. */ - ELF(Word) *hash = 0; + ELF_HASH_ENTRY *hash = 0; vdso_info.symstrings = 0; vdso_info.symtab = 0; vdso_info.versym = 0; @@ -133,7 +139,7 @@ void vdso_init_from_sysinfo_ehdr(uintptr_t base) + vdso_info.load_offset); break; case DT_HASH: - hash = (ELF(Word) *) + hash = (ELF_HASH_ENTRY *) ((uintptr_t)dyn[i].d_un.d_ptr + vdso_info.load_offset); break;