* arm-tdep.c (arm_frame_chain_valid): Remove unnecessary test.

	* d10v-tdep.c (d10v_frame_chain_valid): Remove unnecessary tests.
	* hppa-tdep.c (hppa_frame_chain_valid): Remove unnecessary test.

	* blockframe.c: Include "gdbcmd.h" and "command.h".
	(backtrace_below_main): New variable.
	(file_frame_chain_valid, func_frame_chain_valid)
	(nonnull_frame_chain_valid, generic_file_frame_chain_valid)
	(generic_func_frame_chain_valid): Remove functions.
	(frame_chain_valid, do_flush_frames_sfunc): New functions.
	(_initialize_blockframe): New function.
	* Makefile.in (blockframe.o): Update dependencies.
	* frame.c (frame_saved_regs_id_unwind, get_prev_frame): Remove FIXME
	comment.  Call frame_chain_valid ().
	* frame.h: Remove old prototypes.  Add prototype for
	frame_chain_valid and update comments to match.
	* gdbarch.sh: Change FRAME_CHAIN_VALID into a predicated function.
	Remove old comment.
	* gdbarch.h: Regenerated.
	* gdbarch.c: Regenerated.

Plus updates to all other targets not to provide a FRAME_CHAIN_VALID.

5 files changed, 6 insertions, 32 deletions

diff --git a/gdb/config/m68k/tm-apollo68b.h b/gdb/config/m68k/tm-apollo68b.h
index d43eec9..f0b7488 100644
--- a/gdb/config/m68k/tm-apollo68b.h
+++ b/gdb/config/m68k/tm-apollo68b.h
@@ -1,5 +1,5 @@
 /* Parameters for execution on Apollo 68k running BSD.
-   Copyright 1986, 1987, 1989, 1991, 1993, 1994, 1998
+   Copyright 1986, 1987, 1989, 1991, 1993, 1994, 1998, 2003
    Free Software Foundation, Inc.
    Contributed by Cygnus Support.
 
@@ -26,8 +26,6 @@
 
 #include "m68k/tm-m68k.h"
 
-#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)
-
 /* These are the jmp_buf registers I could guess. There are 13 registers
  * in the buffer. There are 8 data registers, 6 general address registers,
  * the Frame Pointer, the Stack Pointer, the PC and the SR in the chip. I would
diff --git a/gdb/config/m68k/tm-m68kv4.h b/gdb/config/m68k/tm-m68kv4.h
index 275ab62..11bb122 100644
--- a/gdb/config/m68k/tm-m68kv4.h
+++ b/gdb/config/m68k/tm-m68kv4.h
@@ -1,6 +1,6 @@
 /* Target definitions for GDB on a Motorola 680x0 running SVR4.
    (Commodore Amiga with amix or Atari TT with ASV)
-   Copyright 1991, 1994, 1995, 1996, 1998, 1999, 2000
+   Copyright 1991, 1994, 1995, 1996, 1998, 1999, 2000, 2003
    Free Software Foundation, Inc.
    Written by Fred Fish at Cygnus Support (fnf@cygint)
 
@@ -30,10 +30,6 @@
 
 #define DECR_PC_AFTER_BREAK 0	/* No decrement required */
 
-/* Use the alternate method of determining valid frame chains. */
-
-#define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi)
-
 #include "config/tm-sysv4.h"
 #include "m68k/tm-m68k.h"
 
diff --git a/gdb/config/m68k/tm-monitor.h b/gdb/config/m68k/tm-monitor.h
index 6d38b55..1b00a8f 100644
--- a/gdb/config/m68k/tm-monitor.h
+++ b/gdb/config/m68k/tm-monitor.h
@@ -1,5 +1,5 @@
 /* Target machine definitions for a generic m68k monitor/emulator.
-   Copyright 1986, 1987, 1989, 1993, 1994, 1995, 1996, 1998, 1999
+   Copyright 1986, 1987, 1989, 1993, 1994, 1995, 1996, 1998, 1999, 2003
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -38,9 +38,4 @@
 
 #include "m68k/tm-m68k.h"
 
-/* Need to do this for ELF targets, where we can't figure out the boundaries of
-   the entry file.  This method stops the backtrace when we reach main.  */
-
-#define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi)
-
 /* FIXME, should do GET_LONGJMP_TARGET for newlib.  */
diff --git a/gdb/config/m68k/tm-os68k.h b/gdb/config/m68k/tm-os68k.h
index ed1d5c8..2954570 100644
--- a/gdb/config/m68k/tm-os68k.h
+++ b/gdb/config/m68k/tm-os68k.h
@@ -1,5 +1,5 @@
 /* Parameters for execution on VxWorks m68k's, for GDB, the GNU debugger.
-   Copyright 1986, 1987, 1989, 1991, 1998 Free Software Foundation, Inc.
+   Copyright 1986, 1987, 1989, 1991, 1998, 2003 Free Software Foundation, Inc.
    Contributed by Cygnus Support.
 
    This file is part of GDB.
@@ -37,11 +37,3 @@
 
 #undef	FRAME_CHAIN
 #define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
-
-/* If the chain pointer is zero (either because the saved value fetched
-   by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
-   never fetched anything), we are at the top of the stack.  */
-/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
-
-#undef FRAME_CHAIN_VALID
-#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)
diff --git a/gdb/config/m68k/tm-vx68.h b/gdb/config/m68k/tm-vx68.h
index ea27ac4..76ac6fd 100644
--- a/gdb/config/m68k/tm-vx68.h
+++ b/gdb/config/m68k/tm-vx68.h
@@ -1,5 +1,6 @@
 /* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
-   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000
+   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000,
+   2002, 2003
    Free Software Foundation, Inc.
    Contributed by Cygnus Support.
 
@@ -41,14 +42,6 @@
 #undef	FRAME_CHAIN
 #define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
 
-/* If the chain pointer is zero (either because the saved value fetched
-   by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
-   never fetched anything), we are at the top of the stack.  */
-/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
-
-#undef	FRAME_CHAIN_VALID
-#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)
-
 /* FIXME, Longjmp information stolen from Sun-3 config.  Dunno if right.  */
 /* Offsets (in target ints) into jmp_buf.  Not defined by Sun, but at least
    documented in a comment in <machine/setjmp.h>! */