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1 /* libunwind - a platform-independent unwind library
2    Copyright (C) 2003-2004 Hewlett-Packard Co
3 
4 This file is part of libunwind.
5 
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
13 
14 The above copyright notice and this permission notice shall be
15 included in all copies or substantial portions of the Software.
16 
17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 WITH 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)
29 extern "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 
47 typedef uint32_t unw_word_t;
48 typedef int32_t unw_sword_t;
49 
50 typedef union
51   {
52     struct { unw_word_t bits[2]; } raw;
53     double val;
54   }
55 unw_tdep_fpreg_t;
56 
57 typedef 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   }
93 hppa_regnum_t;
94 
95 #define UNW_TDEP_NUM_EH_REGS	4
96 
97 typedef struct unw_tdep_save_loc
98   {
99     /* Additional target-dependent info on a save location.  */
100     /* ANDROID support update. */
101     char __reserved;
102     /* End of ANDROID update. */
103   }
104 unw_tdep_save_loc_t;
105 
106 /* On PA-RISC, we can directly use ucontext_t as the unwind context.  */
107 typedef ucontext_t unw_tdep_context_t;
108 
109 #define unw_tdep_is_fpreg(r)		((unsigned) ((r) - UNW_HPPA_FR) < 32)
110 
111 #include "libunwind-dynamic.h"
112 
113 typedef struct
114   {
115     /* no PA-RISC-specific auxiliary proc-info */
116     /* ANDROID support update. */
117     char __reserved;
118     /* End of ANDROID update. */
119   }
120 unw_tdep_proc_info_t;
121 
122 #include "libunwind-common.h"
123 
124 #define unw_tdep_getcontext		UNW_ARCH_OBJ (getcontext)
125 extern int unw_tdep_getcontext (unw_tdep_context_t *);
126 
127 #if defined(__cplusplus) || defined(c_plusplus)
128 }
129 #endif
130 
131 #endif /* LIBUNWIND_H */
132