aboutsummaryrefslogtreecommitdiff
path: root/bfd/elf64-s390.c
diff options
context:
space:
mode:
authorAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-03-14 11:45:05 +0100
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-03-14 11:45:05 +0100
commitb9005ba76ee501a809f2657b04bb2f2590829fa3 (patch)
treead58cef6850906fa36b98d762878ebe3ebc8284d /bfd/elf64-s390.c
parent5cddc23a3a0b855858e8eca93d6dd90aec00d914 (diff)
downloadgdb-b9005ba76ee501a809f2657b04bb2f2590829fa3.zip
gdb-b9005ba76ee501a809f2657b04bb2f2590829fa3.tar.gz
gdb-b9005ba76ee501a809f2657b04bb2f2590829fa3.tar.bz2
S/390: Disable relocation sort against code sections.
When downgrading from GD to IE model we rewrite the call to __tls_get_offset to a 64 bit load instruction. This relies on the fact that the additional relocation for the call target has already been executed when doing the rewrite. f1018: e3 20 d0 00 00 04 lg %r2,0(%r13) f101e: c0 e5 00 00 00 00 brasl %r14,f101e <__res_init+0x1e> f101e: R_390_TLS_GDCALL __libc_resp f1020: R_390_PLT32DBL __tls_get_offset+0x2 0000000f1020 39f6c00000014 R_390_PLT32DBL 0000000000000000 __tls_get_offset + 2 0000000f101e 3afb700000026 R_390_TLS_GDCALL 0000000000000008 __libc_resp + 0 Due to the reloc sorting the order changed an the PLT32DBL reloc is executed after the rewrite and overwrites part of the load instruction with garbage. bfd/ 2015-03-14 Andreas Krebbel <krebbel@linux.vnet.ibm.com> * elf-s390-common.c (elf_s390_elf_sort_relocs_p): Don't sort relocs against code sections. * elf32-s390.c: Define elf_backend_sort_relocs_p. * elf64-s390.c: Likewise.
Diffstat (limited to 'bfd/elf64-s390.c')
-rw-r--r--bfd/elf64-s390.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c
index e002f06..f06b58a 100644
--- a/bfd/elf64-s390.c
+++ b/bfd/elf64-s390.c
@@ -3840,6 +3840,7 @@ const struct elf_size_info s390_elf64_size_info =
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
+#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
#define bfd_elf64_mkobject elf_s390_mkobject
#define elf_backend_object_p elf_s390_object_p