1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2003-2004 Hewlett-Packard Co
3
4This file is part of libunwind.
5
6Permission is hereby granted, free of charge, to any person obtaining
7a copy of this software and associated documentation files (the
8"Software"), to deal in the Software without restriction, including
9without limitation the rights to use, copy, modify, merge, publish,
10distribute, sublicense, and/or sell copies of the Software, and to
11permit persons to whom the Software is furnished to do so, subject to
12the following conditions:
13
14The above copyright notice and this permission notice shall be
15included in all copies or substantial portions of the Software.
16
17THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
24
25#ifndef LIBUNWIND_H
26#define LIBUNWIND_H
27
28#if defined(__cplusplus) || defined(c_plusplus)
29extern "C" {
30#endif
31
32#include <inttypes.h>
33#include <ucontext.h>
34
35#define UNW_TARGET      hppa
36#define UNW_TARGET_HPPA 1
37
38#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
39
40/* This needs to be big enough to accommodate "struct cursor", while
41   leaving some slack for future expansion.  Changing this value will
42   require recompiling all users of this library.  Stack allocation is
43   relatively cheap and unwind-state copying is relatively rare, so we
44   want to err on making it rather too big than too small.  */
45#define UNW_TDEP_CURSOR_LEN     511
46
47typedef uint32_t unw_word_t;
48typedef int32_t unw_sword_t;
49
50typedef union
51  {
52    struct { unw_word_t bits[2]; } raw;
53    double val;
54  }
55unw_tdep_fpreg_t;
56
57typedef enum
58  {
59    /* Note: general registers are expected to start with index 0.
60       This convention facilitates architecture-independent
61       implementation of the C++ exception handling ABI.  See
62       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
63    UNW_HPPA_GR = 0,
64     UNW_HPPA_RP = 2,                   /* return pointer */
65     UNW_HPPA_FP = 3,                   /* frame pointer */
66     UNW_HPPA_SP = UNW_HPPA_GR + 30,
67
68    UNW_HPPA_FR = UNW_HPPA_GR + 32,
69
70    UNW_HPPA_IP = UNW_HPPA_FR + 32,     /* instruction pointer */
71
72    /* other "preserved" registers (fpsr etc.)... */
73
74    /* PA-RISC has 4 exception-argument registers but they're not
75       contiguous.  To deal with this, we define 4 pseudo
76       exception-handling registers which we then alias to the actual
77       physical register.  */
78
79    UNW_HPPA_EH0 = UNW_HPPA_IP + 1,     /* alias for UNW_HPPA_GR + 20 */
80    UNW_HPPA_EH1 = UNW_HPPA_EH0 + 1,    /* alias for UNW_HPPA_GR + 21 */
81    UNW_HPPA_EH2 = UNW_HPPA_EH1 + 1,    /* alias for UNW_HPPA_GR + 22 */
82    UNW_HPPA_EH3 = UNW_HPPA_EH2 + 1,    /* alias for UNW_HPPA_GR + 31 */
83
84    /* frame info (read-only) */
85    UNW_HPPA_CFA,
86
87    UNW_TDEP_LAST_REG = UNW_HPPA_IP,
88
89    UNW_TDEP_IP = UNW_HPPA_IP,
90    UNW_TDEP_SP = UNW_HPPA_SP,
91    UNW_TDEP_EH = UNW_HPPA_EH0
92  }
93hppa_regnum_t;
94
95#define UNW_TDEP_NUM_EH_REGS    4
96
97typedef struct unw_tdep_save_loc
98  {
99    /* Additional target-dependent info on a save location.  */
100  }
101unw_tdep_save_loc_t;
102
103/* On PA-RISC, we can directly use ucontext_t as the unwind context.  */
104typedef ucontext_t unw_tdep_context_t;
105
106#define unw_tdep_is_fpreg(r)            ((unsigned) ((r) - UNW_HPPA_FR) < 32)
107
108#include "libunwind-dynamic.h"
109
110typedef struct
111  {
112    /* no PA-RISC-specific auxiliary proc-info */
113  }
114unw_tdep_proc_info_t;
115
116#include "libunwind-common.h"
117
118#define unw_tdep_getcontext             UNW_ARCH_OBJ (getcontext)
119extern int unw_tdep_getcontext (unw_tdep_context_t *);
120
121#if defined(__cplusplus) || defined(c_plusplus)
122}
123#endif
124
125#endif /* LIBUNWIND_H */
126