/* Subroutines needed for unwinding stack frames for exception handling. */
-/* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2009
+ Free Software Foundation, Inc.
Contributed by Jason Merrill <jason@cygnus.com>.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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, or (at your option)
-any later version.
+GCC 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 3, or (at your option) any later
+version.
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
+GCC 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.
-GNU CC 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.
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+#ifndef GCC_UNWIND_DW2_FDE_H
+#define GCC_UNWIND_DW2_FDE_H
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility push(default)
+#endif
+
+struct fde_vector
+{
+ const void *orig_data;
+ size_t count;
+ const struct dwarf_fde *array[];
+};
-/* Describes data used to hold onto one shared object or object file. */
struct object
{
void *pc_begin;
+ void *tbase;
+ void *dbase;
+ union {
+ const struct dwarf_fde *single;
+ struct dwarf_fde **array;
+ struct fde_vector *sort;
+ } u;
+
+ union {
+ struct {
+ unsigned long sorted : 1;
+ unsigned long from_array : 1;
+ unsigned long mixed_encoding : 1;
+ unsigned long encoding : 8;
+ /* ??? Wish there was an easy way to detect a 64-bit host here;
+ we've got 32 bits left to play with... */
+ unsigned long count : 21;
+ } b;
+ size_t i;
+ } s;
+
+#ifdef DWARF2_OBJECT_END_PTR_EXTENSION
+ char *fde_end;
+#endif
+
+ struct object *next;
+};
+
+/* This is the original definition of struct object. While the struct
+ itself was opaque to users, they did know how large it was, and
+ allocate one statically in crtbegin for each DSO. Keep this around
+ so that we're aware of the static size limitations for the new struct. */
+struct old_object
+{
+ void *pc_begin;
void *pc_end;
struct dwarf_fde *fde_begin;
struct dwarf_fde **fde_array;
size_t count;
- struct object *next;
+ struct old_object *next;
};
struct dwarf_eh_bases
};
-extern void __register_frame_info (void *, struct object *);
+extern void __register_frame_info_bases (const void *, struct object *,
+ void *, void *);
+extern void __register_frame_info (const void *, struct object *);
extern void __register_frame (void *);
+extern void __register_frame_info_table_bases (void *, struct object *,
+ void *, void *);
extern void __register_frame_info_table (void *, struct object *);
extern void __register_frame_table (void *);
-extern void *__deregister_frame_info (void *);
+extern void *__deregister_frame_info (const void *);
+extern void *__deregister_frame_info_bases (const void *);
extern void __deregister_frame (void *);
\f
is located, and what the register lifetimes and stack layout are
within the function.
- The data structures are defined in the DWARF specfication, although
+ The data structures are defined in the DWARF specification, although
not in a very readable way (see LITERATURE).
Every time an exception is thrown, the code needs to locate the FDE
a) in a linear search, find the shared image (i.e. DLL) containing
the PC
b) using the FDE table for that shared object, locate the FDE using
- binary search (which requires the sorting). */
+ binary search (which requires the sorting). */
/* The first few fields of a CIE. The CIE_id field is 0 for a CIE,
to distinguish it from a valid FDE. FDEs are aligned to an addressing
{
uword length;
sword CIE_delta;
- void * pc_begin;
- uaddr pc_range;
+ unsigned char pc_begin[];
} __attribute__ ((packed, aligned (__alignof__ (void *))));
typedef struct dwarf_fde fde;
/* Locate the CIE for a given FDE. */
-static inline struct dwarf_cie *
-get_cie (struct dwarf_fde *f)
+static inline const struct dwarf_cie *
+get_cie (const struct dwarf_fde *f)
{
- return (void *)&f->CIE_delta - f->CIE_delta;
+ return (const void *)&f->CIE_delta - f->CIE_delta;
}
-static inline fde *
-next_fde (fde *f)
+static inline const fde *
+next_fde (const fde *f)
{
- return (fde *)((char *)f + f->length + sizeof (f->length));
+ return (const fde *) ((const char *) f + f->length + sizeof (f->length));
}
-extern fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
+extern const fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
+
+static inline int
+last_fde (struct object *obj __attribute__ ((__unused__)), const fde *f)
+{
+#ifdef DWARF2_OBJECT_END_PTR_EXTENSION
+ return (char *)f == obj->fde_end || f->length == 0;
+#else
+ return f->length == 0;
+#endif
+}
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility pop
+#endif
+
+#endif /* unwind-dw2-fde.h */
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