libunwind_i.h revision 5f38f35d5d6c78aafa6da20845d9ceff74af00f8 
1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2003-2005 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5This file is part of libunwind.
6
7Permission is hereby granted, free of charge, to any person obtaining
8a copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sublicense, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice shall be
16included in all copies or substantial portions of the Software.
17
18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
25
26#ifndef HPPA_LIBUNWIND_I_H
27#define HPPA_LIBUNWIND_I_H
28
29/* Target-dependent definitions that are internal to libunwind but need
30   to be shared with target-independent code.  */
31
32#include <stdlib.h>
33#include <libunwind.h>
34
35#include "elf32.h"
36#include "dwarf.h"
37
38typedef struct
39  {
40    /* no hppa-specific fast trace */
41  }
42unw_tdep_frame_t;
43
44struct unw_addr_space
45  {
46    struct unw_accessors acc;
47    unw_caching_policy_t caching_policy;
48#ifdef HAVE_ATOMIC_OPS_H
49    AO_t cache_generation;
50#else
51    uint32_t cache_generation;
52#endif
53    unw_word_t dyn_generation;		/* see dyn-common.h */
54    unw_word_t dyn_info_list_addr;	/* (cached) dyn_info_list_addr */
55    struct unw_debug_frame_list *debug_frames;
56   };
57
58struct cursor
59  {
60    struct dwarf_cursor dwarf;		/* must be first */
61
62    /* Format of sigcontext structure and address at which it is
63       stored: */
64    enum
65      {
66	HPPA_SCF_NONE,			/* no signal frame encountered */
67	HPPA_SCF_LINUX_RT_SIGFRAME	/* POSIX ucontext_t */
68      }
69    sigcontext_format;
70    unw_word_t sigcontext_addr;
71  };
72
73#define DWARF_GET_LOC(l)	((l).val)
74
75#ifdef UNW_LOCAL_ONLY
76# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
77# define DWARF_IS_NULL_LOC(l)	(DWARF_GET_LOC (l) == 0)
78# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r) })
79# define DWARF_IS_REG_LOC(l)	0
80# define DWARF_REG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
81				 tdep_uc_addr((c)->as_arg, (r)), 0))
82# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
83# define DWARF_FPREG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
84				 tdep_uc_addr((c)->as_arg, (r)), 0))
85
86static inline int
87dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
88{
89  if (!DWARF_GET_LOC (loc))
90    return -1;
91  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
92  return 0;
93}
94
95static inline int
96dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
97{
98  if (!DWARF_GET_LOC (loc))
99    return -1;
100  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
101  return 0;
102}
103
104static inline int
105dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
106{
107  if (!DWARF_GET_LOC (loc))
108    return -1;
109  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
110  return 0;
111}
112
113static inline int
114dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
115{
116  if (!DWARF_GET_LOC (loc))
117    return -1;
118  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
119  return 0;
120}
121
122#else /* !UNW_LOCAL_ONLY */
123# define DWARF_LOC_TYPE_FP	(1 << 0)
124# define DWARF_LOC_TYPE_REG	(1 << 1)
125# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
126# define DWARF_IS_NULL_LOC(l)						\
127		({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
128# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r), .type = (t) })
129# define DWARF_IS_REG_LOC(l)	(((l).type & DWARF_LOC_TYPE_REG) != 0)
130# define DWARF_IS_FP_LOC(l)	(((l).type & DWARF_LOC_TYPE_FP) != 0)
131# define DWARF_REG_LOC(c,r)	DWARF_LOC((r), DWARF_LOC_TYPE_REG)
132# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
133# define DWARF_FPREG_LOC(c,r)	DWARF_LOC((r), (DWARF_LOC_TYPE_REG	\
134						| DWARF_LOC_TYPE_FP))
135
136static inline int
137dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
138{
139  char *valp = (char *) &val;
140  unw_word_t addr;
141  int ret;
142
143  if (DWARF_IS_NULL_LOC (loc))
144    return -UNW_EBADREG;
145
146  if (DWARF_IS_REG_LOC (loc))
147    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
148				       val, 0, c->as_arg);
149
150  addr = DWARF_GET_LOC (loc);
151  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
152				       0, c->as_arg)) < 0)
153    return ret;
154
155  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
156				   c->as_arg);
157}
158
159static inline int
160dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
161{
162  char *valp = (char *) &val;
163  unw_word_t addr;
164  int ret;
165
166  if (DWARF_IS_NULL_LOC (loc))
167    return -UNW_EBADREG;
168
169  if (DWARF_IS_REG_LOC (loc))
170    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
171				       &val, 1, c->as_arg);
172
173  addr = DWARF_GET_LOC (loc);
174  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
175				       1, c->as_arg)) < 0)
176    return ret;
177
178  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
179				   1, c->as_arg);
180}
181
182static inline int
183dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
184{
185  if (DWARF_IS_NULL_LOC (loc))
186    return -UNW_EBADREG;
187
188  /* If a code-generator were to save a value of type unw_word_t in a
189     floating-point register, we would have to support this case.  I
190     suppose it could happen with MMX registers, but does it really
191     happen?  */
192  assert (!DWARF_IS_FP_LOC (loc));
193
194  if (DWARF_IS_REG_LOC (loc))
195    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
196				     0, c->as_arg);
197  else
198    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
199				     0, c->as_arg);
200}
201
202static inline int
203dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
204{
205  if (DWARF_IS_NULL_LOC (loc))
206    return -UNW_EBADREG;
207
208  /* If a code-generator were to save a value of type unw_word_t in a
209     floating-point register, we would have to support this case.  I
210     suppose it could happen with MMX registers, but does it really
211     happen?  */
212  assert (!DWARF_IS_FP_LOC (loc));
213
214  if (DWARF_IS_REG_LOC (loc))
215    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
216				     1, c->as_arg);
217  else
218    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
219				     1, c->as_arg);
220}
221
222#endif /* !UNW_LOCAL_ONLY */
223
224#define tdep_needs_initialization	UNW_OBJ(needs_initialization)
225#define tdep_init			UNW_OBJ(init)
226/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
227   tdep_search_unwind_table.  */
228#define tdep_search_unwind_table	dwarf_search_unwind_table
229#define tdep_uc_addr			UNW_ARCH_OBJ(uc_addr)
230#define tdep_get_elf_image		UNW_ARCH_OBJ(get_elf_image)
231#define tdep_access_reg			UNW_OBJ(access_reg)
232#define tdep_access_fpreg		UNW_OBJ(access_fpreg)
233#define tdep_fetch_frame(c,ip,n)	do {} while(0)
234#define tdep_cache_frame(c,rs)		do {} while(0)
235#define tdep_reuse_frame(c,rs)		do {} while(0)
236#define tdep_stash_frame(c,rs)		do {} while(0)
237#define tdep_trace(cur,addr,n)		(-UNW_ENOINFO)
238
239#ifdef UNW_LOCAL_ONLY
240# define tdep_find_proc_info(c,ip,n)				\
241	dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),	\
242				       (c)->as_arg)
243# define tdep_put_unwind_info(c,pi)				\
244	dwarf_put_unwind_info((c)->as, (pi), (c)->as_arg)
245#else
246# define tdep_find_proc_info(c,ip,n)					\
247	(*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),	\
248				       (c)->as_arg)
249# define tdep_put_unwind_info(c,pi)					\
250	(*(c)->as->acc.put_unwind_info)((c)->as, (pi), (c)->as_arg)
251#endif
252
253#define tdep_get_as(c)			((c)->dwarf.as)
254#define tdep_get_as_arg(c)		((c)->dwarf.as_arg)
255#define tdep_get_ip(c)			((c)->dwarf.ip)
256#define tdep_big_endian(as)		1
257
258extern int tdep_needs_initialization;
259
260extern void tdep_init (void);
261extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
262				     unw_dyn_info_t *di, unw_proc_info_t *pi,
263				     int need_unwind_info, void *arg);
264extern void *tdep_uc_addr (ucontext_t *uc, int reg);
265extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
266			       unsigned long *segbase, unsigned long *mapoff,
267			       char *path, size_t pathlen);
268extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
269			    unw_word_t *valp, int write);
270extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
271			      unw_fpreg_t *valp, int write);
272
273#endif /* HPPA_LIBUNWIND_I_H */
274