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Diffstat (limited to 'sysdeps/generic/unwind-dw2-fde.h')
| -rw-r--r-- | sysdeps/generic/unwind-dw2-fde.h | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/sysdeps/generic/unwind-dw2-fde.h b/sysdeps/generic/unwind-dw2-fde.h deleted file mode 100644 index 941ab80d7b..0000000000 --- a/sysdeps/generic/unwind-dw2-fde.h +++ /dev/null @@ -1,169 +0,0 @@ -/* Subroutines needed for unwinding stack frames for exception handling. */ -/* Copyright (C) 1997-2017 Free Software Foundation, Inc. - Contributed by Jason Merrill <jason@cygnus.com>. - - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - - -struct fde_vector -{ - void *orig_data; - size_t count; - struct dwarf_fde *array __flexarr; -}; - -#ifdef _LIBC -#include <gccframe.h> -#else -struct object -{ - void *pc_begin; - void *tbase; - void *dbase; - union { - 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; -}; -#endif - -/* 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 old_object *next; -}; - -struct dwarf_eh_bases -{ - void *tbase; - void *dbase; - void *func; -}; - - -extern void __register_frame_info_bases (void *, struct object *, - void *, void *); -extern void __register_frame_info (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_bases (void *); -extern void __deregister_frame (void *); - - -typedef int sword __attribute__ ((mode (SI))); -typedef unsigned int uword __attribute__ ((mode (SI))); -typedef unsigned int uaddr __attribute__ ((mode (pointer))); -typedef int saddr __attribute__ ((mode (pointer))); -typedef unsigned char ubyte; - -/* Terminology: - CIE - Common Information Element - FDE - Frame Descriptor Element - - There is one per function, and it describes where the function code - is located, and what the register lifetimes and stack layout are - within the function. - - 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 - for the current function, and starts to look for exception regions - from that FDE. This works in a two-level search: - 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). */ - -/* 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 - unit boundary, but the fields within are unaligned. */ -struct dwarf_cie -{ - uword length; - sword CIE_id; - ubyte version; - unsigned char augmentation __flexarr; -} __attribute__ ((packed, aligned (__alignof__ (void *)))); - -/* The first few fields of an FDE. */ -struct dwarf_fde -{ - uword length; - sword CIE_delta; - unsigned char pc_begin __flexarr; -} __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) -{ - return (void *)&f->CIE_delta - f->CIE_delta; -} - -static inline fde * -next_fde (fde *f) -{ - return (fde *) ((char *) f + f->length + sizeof (f->length)); -} - -extern fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *); - -static inline int -last_fde (struct object *obj __attribute__ ((__unused__)), fde *f) -{ -#ifdef DWARF2_OBJECT_END_PTR_EXTENSION - return (char *)f == obj->fde_end || f->length == 0; -#else - return f->length == 0; -#endif -} |