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authorAndrew Cagney <cagney@redhat.com>2003-01-18 17:25:23 +0000
committerAndrew Cagney <cagney@redhat.com>2003-01-18 17:25:23 +0000
commit494cca16bdd872bee43d180d3f786d1955d1eb01 (patch)
treef7c150ffd3dc867d280bbf81999d036f2b454e40 /gdb/frame-unwind.h
parent4efb68b1ad0f40fa002c954c213a516d1e39cfb3 (diff)
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration. (dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto. (struct frame_unwind): Declare opaque. (dummy_frame_p): Declare function. * dummy-frame.c (dummy_frame_id_unwind): Make static. (dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto. * dummy-frame.c: Include "frame-unwind.h". (dummy_frame_p): New function. (dummy_frame_unwind): New variable. * frame.c: Include "frame-unwind.h". (frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update to use the new unwind field. (set_unwind_by_pc): Delete function. (create_new_frame, get_prev_frame): Set unwind field using frame_unwind_find_by_pc. (trad_frame_unwind, trad_frame_unwinder): New variables. * frame.h (trad_frame_unwind): Declare variable. (frame_id_unwind_ftype): Delete declaration. (frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto. (struct frame_unwind): Declare opaque. (struct frame_info): Replace the fields id_unwind, pc_unwind and register_unwind with a single unwind pointer. * frame-unwind.h, frame-unwind.c: New files. * Makefile.in (SFILES): Add frame-unwind.c. (frame_unwind_h): Define. (COMMON_OBS): Add frame-unwind.o. (frame-unwind.o): Specify dependencies. (frame.o, dummy-frame.o): Update dependencies.
Diffstat (limited to 'gdb/frame-unwind.h')
-rw-r--r--gdb/frame-unwind.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
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+/* Definitions for a frame unwinder, for GDB, the GNU debugger.
+
+ Copyright 2003 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_UNWIND_H)
+#define FRAME_UNWIND_H 1
+
+struct frame_info;
+struct frame_id;
+struct frame_unwind;
+struct gdbarch;
+struct regcache;
+
+/* Return the frame unwind methods for the function that contains PC,
+ or NULL if this this unwinder can't handle this frame. */
+
+typedef const struct frame_unwind *(frame_unwind_p_ftype) (CORE_ADDR pc);
+
+/* Add a frame unwinder to the list. The predicates are polled in the
+ order that they are appended. The initial list contains the dummy
+ frame's predicate. */
+
+extern void frame_unwind_append_predicate (struct gdbarch *gdbarch,
+ frame_unwind_p_ftype *p);
+
+/* Iterate through the list of frame unwinders until one returns an
+ implementation. */
+
+extern const struct frame_unwind *frame_unwind_find_by_pc (struct gdbarch
+ *gdbarch,
+ CORE_ADDR pc);
+
+/* Return the location (and possibly value) of REGNUM for the previous
+ (older, up) frame. All parameters except VALUEP can be assumed to
+ be non NULL. When VALUEP is NULL, just the location of the
+ register should be returned.
+
+ UNWIND_CACHE is provided as mechanism for implementing a per-frame
+ local cache. It's initial value being NULL. Memory for that cache
+ should be allocated using frame_obstack_zalloc().
+
+ Register window architectures (eg SPARC) should note that REGNUM
+ identifies the register for the previous frame. For instance, a
+ request for the value of "o1" for the previous frame would be found
+ in the register "i1" in this FRAME. */
+
+typedef void (frame_unwind_reg_ftype) (struct frame_info * frame,
+ void **unwind_cache,
+ int regnum,
+ int *optimized,
+ enum lval_type * lvalp,
+ CORE_ADDR *addrp,
+ int *realnump, void *valuep);
+
+/* Same as for registers above, but return the address at which the
+ calling frame would resume. */
+
+typedef CORE_ADDR (frame_unwind_pc_ftype) (struct frame_info * frame,
+ void **unwind_cache);
+
+/* Same as for registers above, but return the ID of the frame that
+ called this one. */
+
+typedef void (frame_unwind_id_ftype) (struct frame_info * frame,
+ void **unwind_cache,
+ struct frame_id * id);
+
+
+struct frame_unwind
+{
+ /* Should the frame's type go here? */
+ /* Should an attribute indicating the frame's address-in-block go
+ here? */
+ frame_unwind_pc_ftype *pc;
+ frame_unwind_id_ftype *id;
+ frame_unwind_reg_ftype *reg;
+};
+
+#endif