2003-01-15 David Carlton <carlton@math.stanford.edu>

[deliverable/binutils-gdb.git] / gdb / arch-utils.c

diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c
index c11c39cf949acdf6da6de9906b96751be4d2f77d..1202df980ce95783bfb031f54fb55c1fd09231b6 100644 (file)
--- a/gdb/arch-utils.c
+++ b/gdb/arch-utils.c
@@ -1,6 +1,6 @@
 /* Dynamic architecture support for GDB, the GNU debugger.
 
-   Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
+   Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
    Inc.
 
    This file is part of GDB.
@@ -95,12 +95,26 @@ legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
    register cache.  */
 void
 legacy_extract_return_value (struct type *type, struct regcache *regcache,
-                            char *valbuf)
+                            void *valbuf)
 {
   char *registers = deprecated_grub_regcache_for_registers (regcache);
-  DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, valbuf);
+  bfd_byte *buf = valbuf;
+  DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */
 }
 
+/* Implementation of store return value that grubs the register cache.
+   Takes a local copy of the buffer to avoid const problems.  */
+void
+legacy_store_return_value (struct type *type, struct regcache *regcache,
+                          const void *buf)
+{
+  bfd_byte *b = alloca (TYPE_LENGTH (type));
+  gdb_assert (regcache == current_regcache);
+  memcpy (b, buf, TYPE_LENGTH (type));
+  DEPRECATED_STORE_RETURN_VALUE (type, b);
+}
+
+
 int
 legacy_register_sim_regno (int regnum)
 {
@@ -299,13 +313,6 @@ no_op_reg_to_regnum (int reg)
   return reg;
 }
 
-/* For use by frame_args_address and frame_locals_address.  */
-CORE_ADDR
-default_frame_address (struct frame_info *fi)
-{
-  return fi->frame;
-}
-
 /* Default prepare_to_procced().  */
 int
 default_prepare_to_proceed (int select_it)
@@ -366,21 +373,22 @@ generic_prepare_to_proceed (int select_it)
   
 }
 
-void
+CORE_ADDR
 init_frame_pc_noop (int fromleaf, struct frame_info *prev)
 {
-  return;
+  /* Do nothing, implies return the same PC value.  */
+  return get_frame_pc (prev);
 }
 
-void
+CORE_ADDR
 init_frame_pc_default (int fromleaf, struct frame_info *prev)
 {
   if (fromleaf)
-    prev->pc = SAVED_PC_AFTER_CALL (prev->next);
-  else if (prev->next != NULL)
-    prev->pc = FRAME_SAVED_PC (prev->next);
+    return SAVED_PC_AFTER_CALL (get_next_frame (prev));
+  else if (get_next_frame (prev) != NULL)
+    return FRAME_SAVED_PC (get_next_frame (prev));
   else
-    prev->pc = read_pc ();
+    return read_pc ();
 }
 
 void
@@ -409,8 +417,19 @@ legacy_virtual_frame_pointer (CORE_ADDR pc,
                              int *frame_regnum,
                              LONGEST *frame_offset)
 {
-  gdb_assert (FP_REGNUM >= 0);
-  *frame_regnum = FP_REGNUM;
+  /* FIXME: cagney/2002-09-13: This code is used when identifying the
+     frame pointer of the current PC.  It is assuming that a single
+     register and an offset can determine this.  I think it should
+     instead generate a byte code expression as that would work better
+     with things like Dwarf2's CFI.  */
+  if (FP_REGNUM >= 0 && FP_REGNUM < NUM_REGS)
+    *frame_regnum = FP_REGNUM;
+  else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS)
+    *frame_regnum = SP_REGNUM;
+  else
+    /* Should this be an internal error?  I guess so, it is reflecting
+       an architectural limitation in the current design.  */
+    internal_error (__FILE__, __LINE__, "No virtual frame pointer available");
   *frame_offset = 0;
 }
 
@@ -424,18 +443,6 @@ generic_register_size (int regnum)
   return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
 }
 
-#if !defined (IN_SIGTRAMP)
-#if defined (SIGTRAMP_START)
-#define IN_SIGTRAMP(pc, name) \
-       ((pc) >= SIGTRAMP_START(pc)   \
-        && (pc) < SIGTRAMP_END(pc) \
-        )
-#else
-#define IN_SIGTRAMP(pc, name) \
-       (name && STREQ ("_sigtramp", name))
-#endif
-#endif
-
 /* Assume all registers are adjacent.  */
 
 int
@@ -456,7 +463,14 @@ generic_register_byte (int regnum)
 int
 legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
 {
-  return IN_SIGTRAMP(pc, name);
+#if !defined (IN_SIGTRAMP)
+  if (SIGTRAMP_START_P ())
+    return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc);
+  else
+    return name && strcmp ("_sigtramp", name) == 0;
+#else
+  return IN_SIGTRAMP (pc, name);
+#endif
 }
 
 int
@@ -897,6 +911,7 @@ gdbarch_info_init (struct gdbarch_info *info)
 {
   memset (info, 0, sizeof (struct gdbarch_info));
   info->byte_order = BFD_ENDIAN_UNKNOWN;
+  info->osabi = GDB_OSABI_UNINITIALIZED;
 }
 
 /* */