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6eb065e6 | 1 | /* DWARF2 frame unwind data structure for Xtensa. |
748086b7 JJ |
2 | Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, |
3 | 2009 Free Software Foundation, Inc. | |
6eb065e6 SA |
4 | |
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by | |
748086b7 | 9 | the Free Software Foundation; either version 3, or (at your option) |
6eb065e6 SA |
10 | any later version. |
11 | ||
6eb065e6 SA |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
6eb065e6 SA |
25 | |
26 | /* A target can override (perhaps for backward compatibility) how | |
27 | many dwarf2 columns are unwound. */ | |
28 | #ifndef DWARF_FRAME_REGISTERS | |
29 | #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER | |
30 | #endif | |
31 | ||
32 | /* Xtensa's variable-size register window save areas can be unwound without | |
33 | any unwind info. This is a stripped down version of the standard DWARF | |
34 | _Unwind_FrameState. */ | |
35 | typedef struct | |
36 | { | |
6eb065e6 SA |
37 | /* The information we care about from the CIE/FDE. */ |
38 | _Unwind_Personality_Fn personality; | |
39 | _Unwind_Word retaddr_column; | |
40 | unsigned char fde_encoding; | |
41 | unsigned char lsda_encoding; | |
42 | unsigned char saw_z; | |
43 | unsigned char signal_frame; | |
44 | void *eh_ptr; | |
45 | ||
46 | /* Saved registers for a signal frame. */ | |
47 | _Unwind_Word *signal_regs; | |
6c633d45 | 48 | _Unwind_Word signal_ra; |
6eb065e6 SA |
49 | } _Unwind_FrameState; |
50 |