2004-02-12 Andrew Cagney <cagney@redhat.com>

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

diff --git a/gdb/alphafbsd-tdep.c b/gdb/alphafbsd-tdep.c
index f8f515d3cc8c8ae9e03c22f486311fa9173fe9a1..cc5f0e00e55e0d4bf928cfb1540e5375d1d5f7fd 100644 (file)
--- a/gdb/alphafbsd-tdep.c
+++ b/gdb/alphafbsd-tdep.c
@@ -1,5 +1,5 @@
 /* Target-dependent code for FreeBSD/Alpha.
-   Copyright 2001, 2002 Free Software Foundation, Inc.
+   Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -20,6 +20,7 @@
 
 #include "defs.h"
 #include "value.h"
+#include "osabi.h"
 
 #include "alpha-tdep.h"
 
@@ -31,7 +32,7 @@ alphafbsd_use_struct_convention (int gcc_p, struct type *type)
 
   /* 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
@@ -53,31 +54,71 @@ 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)
 {
-  /* FIXME */
-  return 0;
+  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);
 
-  set_gdbarch_pc_in_sigtramp (gdbarch, alphafbsd_pc_in_sigtramp);
+  /* 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);
 
   set_gdbarch_use_struct_convention (gdbarch, alphafbsd_use_struct_convention);
 
+  set_gdbarch_pc_in_sigtramp (gdbarch, alphafbsd_pc_in_sigtramp);
+
+  tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset;
+  tdep->sigcontext_addr = alphafbsd_sigcontext_addr;
+  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, GDB_OSABI_FREEBSD_ELF,
+  gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF,
                           alphafbsd_init_abi);
 }