libunwind-ia64.h revision cd66944a2c0f6e897e28af64e778973c60dd329d 
1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2001-2002 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5This file is part of libunwind.
6
7libunwind is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12libunwind is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.
21
22As a special exception, if you link this library with other files to
23produce an executable, this library does not by itself cause the
24resulting executable to be covered by the GNU General Public License.
25This exception does not however invalidate any other reasons why the
26executable file might be covered by the GNU General Public
27License.  */
28
29#include <ucontext.h>
30
31typedef uint64_t unw_tdep_word_t;
32
33typedef enum
34  {
35    /* Note: general registers are excepted to start with index 0.
36       This convention facilitates architecture-independent
37       implementation of the C++ exception handling ABI.  See
38       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
39    UNW_IA64_GR = 0,			/* general registers (r0..r127) */
40     UNW_IA64_GP = UNW_IA64_GR + 1,
41     UNW_IA64_TP = UNW_IA64_GR + 13,
42
43    UNW_IA64_NAT = UNW_IA64_GR + 128,	/* NaT registers (nat0..nat127) */
44
45    UNW_IA64_FR = UNW_IA64_NAT + 128,	/* fp registers (f0..f127) */
46
47    UNW_IA64_AR = UNW_IA64_FR + 128,	/* application registers (ar0..r127) */
48     UNW_IA64_AR_RSC = UNW_IA64_AR + 16,
49     UNW_IA64_AR_BSP = UNW_IA64_AR + 17,
50     UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18,
51     UNW_IA64_AR_RNAT = UNW_IA64_AR + 19,
52     UNW_IA64_AR_25 = UNW_IA64_AR + 25,	/* reserved (scratch) */
53     UNW_IA64_AR_26 = UNW_IA64_AR + 26,	/* reserved (scratch) */
54     UNW_IA64_AR_CCV = UNW_IA64_AR + 32,
55     UNW_IA64_AR_UNAT = UNW_IA64_AR + 36,
56     UNW_IA64_AR_FPSR = UNW_IA64_AR + 40,
57     UNW_IA64_AR_PFS = UNW_IA64_AR + 64,
58     UNW_IA64_AR_LC = UNW_IA64_AR + 65,
59     UNW_IA64_AR_EC = UNW_IA64_AR + 66,
60
61    UNW_IA64_BR = UNW_IA64_AR + 128,	/* branch registers (b0..p7) */
62    UNW_IA64_PR = UNW_IA64_BR + 8,	/* predicate registers (p0..p63) */
63    UNW_IA64_CFM,
64
65    /* frame info (read-only): */
66    UNW_IA64_CURRENT_BSP,
67    UNW_IA64_IP,
68    UNW_IA64_SP,
69    UNW_IA64_PROC_START,
70    UNW_IA64_HANDLER,
71    UNW_IA64_LSDA,
72
73    UNW_TDEP_LAST_REG = UNW_IA64_LSDA,
74
75    UNW_TDEP_IP = UNW_IA64_IP,
76    UNW_TDEP_SP = UNW_IA64_SP,
77    UNW_TDEP_PROC_START = UNW_IA64_PROC_START,
78    UNW_TDEP_HANDLER = UNW_IA64_HANDLER,
79    UNW_TDEP_LSDA = UNW_IA64_LSDA,
80  }
81ia64_regnum_t;
82
83/* Info needed for a single IA-64 unwind.  A pointer to this structure
84   is expected in the acquire/release callbacks of the unwind
85   accessors.  */
86typedef struct unw_ia64_table
87  {
88    const char *name;		/* table name (or NULL if none) */
89    unw_tdep_word_t segbase;	/* base for offsets in the unwind table */
90    unw_tdep_word_t start;	/* starting IP covered by table */
91    unw_tdep_word_t end;	/* first IP _not_ covered table */
92    unw_tdep_word_t gp;		/* global pointer for this load-module */
93    unw_tdep_word_t length;	/* number of entries in unwind table array */
94
95    /* Pointer to local copy of the unwind descriptor table: */
96    void *array;
97
98    /* Local copy of the unwind descriptor information.  This is
99       initialized such that adding the unwind entry's info_offset
100       yields the address at which the corresponding descriptors can
101       be found.  */
102    const unsigned char *unwind_info_base;
103  }
104unw_ia64_table_t;
105
106/* On IA-64, we can directly use ucontext_t as the unwind context.  */
107typedef ucontext_t unw_tdep_context_t;
108
109/* XXX this is not ideal: an application should not be prevented from
110   using the "getcontext" name just because it's using libunwind.  We
111   can't just use __getcontext() either, because that isn't exported
112   by glibc...  */
113#define unw_tdep_getcontext(uc)		getcontext(uc)
114