1 files changed, 132 insertions, 0 deletions
diff --git a/gdb/alpha-fbsd-tdep.c b/gdb/alpha-fbsd-tdep.c
new file mode 100644
index 0000000..84fedc2
--- /dev/null
+++ b/gdb/alpha-fbsd-tdep.c
@@ -0,0 +1,132 @@
+/* Target-dependent code for FreeBSD/alpha.
+
+   Copyright (C) 2001-2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "value.h"
+#include "osabi.h"
+
+#include "alpha-tdep.h"
+#include "solib-svr4.h"
+
+static int
+alphafbsd_return_in_memory (struct type *type)
+{
+  enum type_code code;
+  int i;
+
+  /* All aggregate types that won't fit in a register must be returned
+     in memory.  */
+  if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE)
+    return 1;
+
+  /* The only aggregate types that can be returned in a register are
+     structs and unions.  Arrays must be returned in memory.  */
+  code = TYPE_CODE (type);
+  if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION)
+    return 1;
+
+  /* We need to check if this struct/union is "integer" like.  For
+     this to be true, the offset of each adressable subfield must be
+     zero.  Note that bit fields are not addressable.  */
+  for (i = 0; i < TYPE_NFIELDS (type); i++)
+    {
+      /* If the field bitsize is non-zero, it isn't adressable.  */
+      if (TYPE_FIELD_BITPOS (type, i) != 0
+	  && TYPE_FIELD_BITSIZE (type, i) == 0)
+	return 1;
+    }
+
+  return 0;
+}
+
+
+/* Support for signal handlers.  */
+
+/* Return whether PC is in a BSD sigtramp routine.  */
+
+CORE_ADDR alphafbsd_sigtramp_start = 0x11ffff68;
+CORE_ADDR alphafbsd_sigtramp_end = 0x11ffffe0;
+
+static int
+alphafbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
+			  CORE_ADDR pc, const char *func_name)
+{
+  return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end);
+}
+
+static LONGEST
+alphafbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+  return pc - alphafbsd_sigtramp_start;
+}
+
+/* Assuming THIS_FRAME is the frame of a BSD sigtramp routine,
+   return the address of the associated sigcontext structure.  */
+
+static CORE_ADDR
+alphafbsd_sigcontext_addr (struct frame_info *this_frame)
+{
+  return get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM) + 24;
+}
+
+/* FreeBSD 5.0-RELEASE or later.  */
+
+static void
+alphafbsd_init_abi (struct gdbarch_info info,
+                    struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  /* FIXME: Should activate generic FreeBSD support here with
+     fbsd_init_abi(), but this requires a valid
+     'iterate_over_regset_sections' gdbarch method and
+     'collect_regset' functions for each regset.  */
+
+  /* Hook into the DWARF CFI frame unwinder.  */
+  alpha_dwarf2_init_abi (info, gdbarch);
+
+  /* Hook into the MDEBUG frame unwinder.  */
+  alpha_mdebug_init_abi (info, gdbarch);
+
+  /* FreeBSD/alpha has SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_lp64_fetch_link_map_offsets);
+
+  tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset;
+  tdep->sigcontext_addr = alphafbsd_sigcontext_addr;
+  tdep->pc_in_sigtramp = alphafbsd_pc_in_sigtramp;
+  tdep->return_in_memory = alphafbsd_return_in_memory;
+  tdep->sc_pc_offset = 288;
+  tdep->sc_regs_offset = 24;
+  tdep->sc_fpregs_offset = 320;
+
+  tdep->jb_pc = 2;
+  tdep->jb_elt_size = 8;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_alphafbsd_tdep (void);
+
+void
+_initialize_alphafbsd_tdep (void)
+{
+  gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF,
+                          alphafbsd_init_abi);
+}