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-rw-r--r--gdb/nindy-tdep.c78
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diff --git a/gdb/nindy-tdep.c b/gdb/nindy-tdep.c
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-/* Target-machine dependent code for the NINDY monitor running on the Intel 960
- Copyright 1991, 1992, 1993, 1994, 1995, 1996, 2000
- Free Software Foundation, Inc.
- Contributed by Intel Corporation.
-
- 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 2 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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/* Miscellaneous NINDY-dependent routines.
- Some replace macros normally defined in "tm.h". */
-
-#include "defs.h"
-#include "symtab.h"
-#include "frame.h"
-#include "gdbcore.h"
-
-/* 'start_frame' is a variable in the NINDY runtime startup routine
- that contains the frame pointer of the 'start' routine (the routine
- that calls 'main'). By reading its contents out of remote memory,
- we can tell where the frame chain ends: backtraces should halt before
- they display this frame. */
-
-int
-nindy_frame_chain_valid (CORE_ADDR chain, struct frame_info *curframe)
-{
- struct symbol *sym;
- struct minimal_symbol *msymbol;
-
- /* crtnindy.o is an assembler module that is assumed to be linked
- * first in an i80960 executable. It contains the true entry point;
- * it performs startup up initialization and then calls 'main'.
- *
- * 'sf' is the name of a variable in crtnindy.o that is set
- * during startup to the address of the first frame.
- *
- * 'a' is the address of that variable in 80960 memory.
- */
- static char sf[] = "start_frame";
- CORE_ADDR a;
-
-
- chain &= ~0x3f; /* Zero low 6 bits because previous frame pointers
- contain return status info in them. */
- if (chain == 0)
- {
- return 0;
- }
-
- sym = lookup_symbol (sf, 0, VAR_NAMESPACE, (int *) NULL,
- (struct symtab **) NULL);
- if (sym != 0)
- {
- a = SYMBOL_VALUE (sym);
- }
- else
- {
- msymbol = lookup_minimal_symbol (sf, NULL, NULL);
- if (msymbol == NULL)
- return 0;
- a = SYMBOL_VALUE_ADDRESS (msymbol);
- }
-
- return (chain != read_memory_integer (a, 4));
-}