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/* ANDROID support update. */
37#include "map_info.h"
38/* End of ANDROID update. */
39#include "mempool.h"
40#include "dwarf.h"
41
42typedef struct
43  {
44    /* no hppa-specific fast trace */
45  }
46unw_tdep_frame_t;
47
48struct unw_addr_space
49  {
50    struct unw_accessors acc;
51    unw_caching_policy_t caching_policy;
52#ifdef HAVE_ATOMIC_OPS_H
53    AO_t cache_generation;
54#else
55    uint32_t cache_generation;
56#endif
57    unw_word_t dyn_generation;		/* see dyn-common.h */
58    unw_word_t dyn_info_list_addr;	/* (cached) dyn_info_list_addr */
59    struct dwarf_rs_cache global_cache;
60    struct unw_debug_frame_list *debug_frames;
61    /* ANDROID support update. */
62    struct map_info *map_list;
63    /* End of ANDROID update. */
64   };
65
66struct cursor
67  {
68    struct dwarf_cursor dwarf;		/* must be first */
69
70    /* Format of sigcontext structure and address at which it is
71       stored: */
72    enum
73      {
74	HPPA_SCF_NONE,			/* no signal frame encountered */
75	HPPA_SCF_LINUX_RT_SIGFRAME	/* POSIX ucontext_t */
76      }
77    sigcontext_format;
78    unw_word_t sigcontext_addr;
79  };
80
81#define DWARF_GET_LOC(l)	((l).val)
82
83#ifdef UNW_LOCAL_ONLY
84# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
85# define DWARF_IS_NULL_LOC(l)	(DWARF_GET_LOC (l) == 0)
86# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r) })
87# define DWARF_IS_REG_LOC(l)	0
88# define DWARF_REG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
89				 tdep_uc_addr((c)->as_arg, (r)), 0))
90# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
91# define DWARF_FPREG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
92				 tdep_uc_addr((c)->as_arg, (r)), 0))
93
94static inline int
95dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
96{
97/* ANDROID support update. */
98  unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc);
99  if (!addr || !map_local_is_readable ((unw_word_t) (uintptr_t) addr))
100    return -1;
101
102  *val = *addr;
103  return 0;
104/* End of ANDROID update. */
105}
106
107static inline int
108dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
109{
110/* ANDROID support update. */
111  unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc);
112  if (!addr || !map_local_is_writable ((unw_word_t) (uintptr_t) addr))
113    return -1;
114
115  *addr = val;
116  return 0;
117/* End of ANDROID update. */
118}
119
120static inline int
121dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
122{
123/* ANDROID support update. */
124  if (!DWARF_GET_LOC (loc))
125    return -1;
126  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
127				   0, c->as_arg);
128/* End of ANDROID update. */
129}
130
131static inline int
132dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
133{
134/* ANDROID support update. */
135  if (!DWARF_GET_LOC (loc))
136    return -1;
137  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
138				   1, c->as_arg);
139/* End of ANDROID update. */
140}
141
142#else /* !UNW_LOCAL_ONLY */
143# define DWARF_LOC_TYPE_FP	(1 << 0)
144# define DWARF_LOC_TYPE_REG	(1 << 1)
145# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
146# define DWARF_IS_NULL_LOC(l)						\
147		({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
148# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r), .type = (t) })
149# define DWARF_IS_REG_LOC(l)	(((l).type & DWARF_LOC_TYPE_REG) != 0)
150# define DWARF_IS_FP_LOC(l)	(((l).type & DWARF_LOC_TYPE_FP) != 0)
151# define DWARF_REG_LOC(c,r)	DWARF_LOC((r), DWARF_LOC_TYPE_REG)
152# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
153# define DWARF_FPREG_LOC(c,r)	DWARF_LOC((r), (DWARF_LOC_TYPE_REG	\
154						| DWARF_LOC_TYPE_FP))
155
156static inline int
157dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
158{
159  char *valp = (char *) &val;
160  unw_word_t addr;
161  int ret;
162
163  if (DWARF_IS_NULL_LOC (loc))
164    return -UNW_EBADREG;
165
166  if (DWARF_IS_REG_LOC (loc))
167    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
168				       val, 0, c->as_arg);
169
170  addr = DWARF_GET_LOC (loc);
171  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
172				       0, c->as_arg)) < 0)
173    return ret;
174
175  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
176				   c->as_arg);
177}
178
179static inline int
180dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
181{
182  char *valp = (char *) &val;
183  unw_word_t addr;
184  int ret;
185
186  if (DWARF_IS_NULL_LOC (loc))
187    return -UNW_EBADREG;
188
189  if (DWARF_IS_REG_LOC (loc))
190    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
191				       &val, 1, c->as_arg);
192
193  addr = DWARF_GET_LOC (loc);
194  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
195				       1, c->as_arg)) < 0)
196    return ret;
197
198  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
199				   1, c->as_arg);
200}
201
202static inline int
203dwarf_get (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				     0, c->as_arg);
217  else
218    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
219				     0, c->as_arg);
220}
221
222static inline int
223dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
224{
225  if (DWARF_IS_NULL_LOC (loc))
226    return -UNW_EBADREG;
227
228  /* If a code-generator were to save a value of type unw_word_t in a
229     floating-point register, we would have to support this case.  I
230     suppose it could happen with MMX registers, but does it really
231     happen?  */
232  assert (!DWARF_IS_FP_LOC (loc));
233
234  if (DWARF_IS_REG_LOC (loc))
235    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
236				     1, c->as_arg);
237  else
238    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
239				     1, c->as_arg);
240}
241
242#endif /* !UNW_LOCAL_ONLY */
243
244#define tdep_getcontext_trace           unw_getcontext
245#define tdep_init_done			UNW_OBJ(init_done)
246#define tdep_init			UNW_OBJ(init)
247/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
248   tdep_search_unwind_table.  */
249#define tdep_search_unwind_table	dwarf_search_unwind_table
250#define tdep_find_unwind_table		dwarf_find_unwind_table
251#define tdep_uc_addr			UNW_ARCH_OBJ(uc_addr)
252#define tdep_get_elf_image		UNW_ARCH_OBJ(get_elf_image)
253#define tdep_access_reg			UNW_OBJ(access_reg)
254#define tdep_access_fpreg		UNW_OBJ(access_fpreg)
255#define tdep_fetch_frame(c,ip,n)	do {} while(0)
256#define tdep_cache_frame(c,rs)		do {} while(0)
257#define tdep_reuse_frame(c,rs)		do {} while(0)
258#define tdep_stash_frame(c,rs)		do {} while(0)
259#define tdep_trace(cur,addr,n)		(-UNW_ENOINFO)
260
261#ifdef UNW_LOCAL_ONLY
262# define tdep_find_proc_info(c,ip,n)				\
263	dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),	\
264				       (c)->as_arg)
265# define tdep_put_unwind_info(as,pi,arg)		\
266	dwarf_put_unwind_info((as), (pi), (arg))
267#else
268# define tdep_find_proc_info(c,ip,n)					\
269	(*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),	\
270				       (c)->as_arg)
271# define tdep_put_unwind_info(as,pi,arg)		\
272	(*(as)->acc.put_unwind_info)((as), (pi), (arg))
273#endif
274
275#define tdep_get_as(c)			((c)->dwarf.as)
276#define tdep_get_as_arg(c)		((c)->dwarf.as_arg)
277#define tdep_get_ip(c)			((c)->dwarf.ip)
278#define tdep_big_endian(as)		1
279
280extern int tdep_init_done;
281
282extern void tdep_init (void);
283extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
284				     unw_dyn_info_t *di, unw_proc_info_t *pi,
285				     int need_unwind_info, void *arg);
286extern void *tdep_uc_addr (ucontext_t *uc, int reg);
287/* ANDROID support update. */
288extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei,
289			       pid_t pid, unw_word_t ip,
290			       unsigned long *segbase, unsigned long *mapoff,
291			       char **path);
292/* End of ANDROID update. */
293extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
294			    unw_word_t *valp, int write);
295extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
296			      unw_fpreg_t *valp, int write);
297
298#endif /* HPPA_LIBUNWIND_I_H */
299