2007-06-20 H.J. Lu <hongjiu.lu@intel.com>

[deliverable/binutils-gdb.git] / gdb / alphafbsd-tdep.c

diff --git a/gdb/alphafbsd-tdep.c b/gdb/alphafbsd-tdep.c
index e2d474910675682c603d5818da89c4e5fdbc1b85..8029dc8359170c58ac24f59eb0de364e08f7f671 100644 (file)
--- a/gdb/alphafbsd-tdep.c
+++ b/gdb/alphafbsd-tdep.c
@@ -1,5 +1,6 @@
-/* Target-dependent code for FreeBSD/Alpha.
-   Copyright 2001 Free Software Foundation, Inc.
+/* Target-dependent code for FreeBSD/alpha.
+
+   Copyright (C) 2001, 2002, 2003, 2006, 2007 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -15,21 +16,25 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #include "defs.h"
 #include "value.h"
+#include "osabi.h"
+
+#include "alpha-tdep.h"
+#include "solib-svr4.h"
 
-int
-alphafbsd_use_struct_convention (int gcc_p, struct type *type)
+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) > REGISTER_SIZE)
+  if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE)
     return 1;
 
   /* The only aggregate types that can be returned in a register are
@@ -51,3 +56,73 @@ alphafbsd_use_struct_convention (int gcc_p, struct type *type)
 
   return 0;
 }
+\f
+
+/* 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 (CORE_ADDR pc, char *func_name)
+{
+  return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end);
+}
+
+static LONGEST
+alphafbsd_sigtramp_offset (CORE_ADDR pc)
+{
+  return pc - alphafbsd_sigtramp_start;
+}
+
+/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
+   routine, return the address of the associated sigcontext structure.  */
+
+static CORE_ADDR
+alphafbsd_sigcontext_addr (struct frame_info *next_frame)
+{
+  return frame_unwind_register_unsigned (next_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);
+
+  /* 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;
+}
+\f
+
+/* 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);
+}