Merge to Cygnus 961112 + add some support (not ready) for shared libs

1 files changed, 196 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/frame.h b/gnu/usr.bin/binutils/gdb/frame.h
new file mode 100644
index 00000000000..1268f9ef1a2
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/frame.h
@@ -0,0 +1,196 @@
+/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
+   Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
+
+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.  */
+
+#if !defined (FRAME_H)
+#define FRAME_H 1
+
+/* Describe the saved registers of a frame.  */
+
+struct frame_saved_regs
+  {
+
+    /* For each register, address of where it was saved on entry to
+       the frame, or zero if it was not saved on entry to this frame.
+       This includes special registers such as pc and fp saved in
+       special ways in the stack frame.  The SP_REGNUM is even more
+       special, the address here is the sp for the next frame, not the
+       address where the sp was saved.  */
+
+    CORE_ADDR regs[NUM_REGS];
+  };
+
+/* We keep a cache of stack frames, each of which is a "struct
+   frame_info".  The innermost one gets allocated (in
+   wait_for_inferior) each time the inferior stops; current_frame
+   points to it.  Additional frames get allocated (in
+   get_prev_frame_info) as needed, and are chained through the next
+   and prev fields.  Any time that the frame cache becomes invalid
+   (most notably when we execute something, but also if we change how
+   we interpret the frames (e.g. "set heuristic-fence-post" in
+   mips-tdep.c, or anything which reads new symbols)), we should call
+   reinit_frame_cache.  */
+
+struct frame_info
+  {
+    /* Nominal address of the frame described.  See comments at FRAME_FP
+       about what this means outside the *FRAME* macros; in the *FRAME*
+       macros, it can mean whatever makes most sense for this machine.  */
+    CORE_ADDR frame;
+
+    /* Address at which execution is occurring in this frame.
+       For the innermost frame, it's the current pc.
+       For other frames, it is a pc saved in the next frame.  */
+    CORE_ADDR pc;
+
+    /* Nonzero if this is a frame associated with calling a signal handler.
+
+       Set by machine-dependent code.  On some machines, if
+       the machine-dependent code fails to check for this, the backtrace
+       will look relatively normal.  For example, on the i386
+         #3  0x158728 in sighold ()
+       On other machines (e.g. rs6000), the machine-dependent code better
+       set this to prevent us from trying to print it like a normal frame.  */
+    int signal_handler_caller;
+
+    /* Anything extra for this structure that may have been defined
+       in the machine dependent files. */
+#ifdef EXTRA_FRAME_INFO
+    EXTRA_FRAME_INFO
+#endif
+
+    /* We should probably also store a "struct frame_saved_regs" here.
+       This is already done by some machines (e.g. config/m88k/tm-m88k.h)
+       but there is no reason it couldn't be general.  */
+
+    /* Pointers to the next and previous frame_info's in the frame cache.  */
+   struct frame_info *next, *prev;
+  };
+
+/* Return the frame address from FR.  Except in the machine-dependent
+   *FRAME* macros, a frame address has no defined meaning other than
+   as a magic cookie which identifies a frame over calls to the
+   inferior.  The only known exception is inferior.h
+   (PC_IN_CALL_DUMMY) [ON_STACK]; see comments there.  You cannot
+   assume that a frame address contains enough information to
+   reconstruct the frame; if you want more than just to identify the
+   frame (e.g. be able to fetch variables relative to that frame),
+   then save the whole struct frame_info (and the next struct
+   frame_info, since the latter is used for fetching variables on some
+   machines).  */
+
+#define FRAME_FP(fi) ((fi)->frame)
+
+/* Define a default FRAME_CHAIN_VALID, in the form that is suitable for most
+   targets.  If FRAME_CHAIN_VALID returns zero it means that the given frame
+   is the outermost one and has no caller.
+
+   If a particular target needs a different definition, then it can override
+   the definition here by providing one in the tm file. */
+
+#if !defined (FRAME_CHAIN_VALID)
+
+#if defined (FRAME_CHAIN_VALID_ALTERNATE)
+
+/* Use the alternate method of avoiding running up off the end of the frame
+   chain or following frames back into the startup code.  See the comments
+   in objfiles.h. */
+   
+#define FRAME_CHAIN_VALID(chain, thisframe)	\
+  ((chain) != 0					\
+   && !inside_main_func ((thisframe) -> pc)	\
+   && !inside_entry_func ((thisframe) -> pc))
+
+#else
+
+#define FRAME_CHAIN_VALID(chain, thisframe)	\
+  ((chain) != 0					\
+   && !inside_entry_file (FRAME_SAVED_PC (thisframe)))
+
+#endif	/* FRAME_CHAIN_VALID_ALTERNATE */
+
+#endif	/* FRAME_CHAIN_VALID */
+
+/* The stack frame that the user has specified for commands to act on.
+   Note that one cannot assume this is the address of valid data.  */
+
+extern struct frame_info *selected_frame;
+
+/* Level of the selected frame:
+   0 for innermost, 1 for its caller, ...
+   or -1 for frame specified by address with no defined level.  */
+
+extern int selected_frame_level;
+
+extern struct frame_info *get_prev_frame_info PARAMS ((struct frame_info *));
+
+extern struct frame_info *create_new_frame PARAMS ((CORE_ADDR, CORE_ADDR));
+
+extern void flush_cached_frames PARAMS ((void));
+
+extern void reinit_frame_cache PARAMS ((void));
+
+extern void get_frame_saved_regs PARAMS ((struct frame_info *,
+					  struct frame_saved_regs *));
+
+extern void set_current_frame PARAMS ((struct frame_info *));
+
+extern struct frame_info *get_prev_frame PARAMS ((struct frame_info *));
+
+extern struct frame_info *get_current_frame PARAMS ((void));
+
+extern struct frame_info *get_next_frame PARAMS ((struct frame_info *));
+
+extern struct block *get_frame_block PARAMS ((struct frame_info *));
+
+extern struct block *get_current_block PARAMS ((void));
+
+extern struct block *get_selected_block PARAMS ((void));
+
+extern struct symbol *get_frame_function PARAMS ((struct frame_info *));
+
+extern CORE_ADDR get_frame_pc PARAMS ((struct frame_info *));
+
+extern CORE_ADDR get_pc_function_start PARAMS ((CORE_ADDR));
+
+extern struct block * block_for_pc PARAMS ((CORE_ADDR));
+
+extern int frameless_look_for_prologue PARAMS ((struct frame_info *));
+
+extern void print_frame_args PARAMS ((struct symbol *, struct frame_info *,
+				      int, GDB_FILE *));
+
+extern struct frame_info *find_relative_frame PARAMS ((struct frame_info *, int*));
+
+extern void print_stack_frame PARAMS ((struct frame_info *, int, int));
+
+extern void select_frame PARAMS ((struct frame_info *, int));
+
+extern void record_selected_frame PARAMS ((CORE_ADDR *, int *));
+
+extern void print_frame_info PARAMS ((struct frame_info *, int, int, int));
+
+extern CORE_ADDR find_saved_register PARAMS ((struct frame_info *, int));
+
+extern struct frame_info *block_innermost_frame PARAMS ((struct block *));
+
+extern struct frame_info *find_frame_addr_in_frame_chain PARAMS ((CORE_ADDR));
+
+extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
+
+#endif /* !defined (FRAME_H)  */