Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/backends/s390_init.c b/backends/s390_init.c
new file mode 100644
index 0000000..ba8df45
--- /dev/null
+++ b/backends/s390_init.c
@@ -0,0 +1,79 @@
+/* Initialization of S/390 specific backend library.
+ Copyright (C) 2005, 2006, 2013 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND s390_
+#define RELOC_PREFIX R_390_
+#include "libebl_CPU.h"
+
+/* This defines the common reloc hooks based on arm_reloc.def. */
+#include "common-reloc.c"
+
+extern __typeof (s390_core_note) s390x_core_note;
+
+
+const char *
+s390_init (Elf *elf __attribute__ ((unused)),
+ GElf_Half machine __attribute__ ((unused)),
+ Ebl *eh,
+ size_t ehlen)
+{
+ /* Check whether the Elf_BH object has a sufficent size. */
+ if (ehlen < sizeof (Ebl))
+ return NULL;
+
+ /* We handle it. */
+ eh->name = "IBM S/390";
+ s390_init_reloc (eh);
+ HOOK (eh, reloc_simple_type);
+ HOOK (eh, register_info);
+ HOOK (eh, return_value_location);
+ if (eh->class == ELFCLASS64)
+ eh->core_note = s390x_core_note;
+ else
+ HOOK (eh, core_note);
+ HOOK (eh, abi_cfi);
+ /* gcc/config/ #define DWARF_FRAME_REGISTERS 34.
+ But from the gcc/config/s390/s390.h "Register usage." comment it looks as
+ if #32 (Argument pointer) and #33 (Condition code) are not used for
+ unwinding. */
+ eh->frame_nregs = 32;
+ HOOK (eh, set_initial_registers_tid);
+ if (eh->class == ELFCLASS32)
+ HOOK (eh, normalize_pc);
+ HOOK (eh, unwind);
+
+ /* Only the 64-bit format uses the incorrect hash table entry size. */
+ if (eh->class == ELFCLASS64)
+ eh->sysvhash_entrysize = sizeof (Elf64_Xword);
+
+ return MODVERSION;
+}