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
5 This file is part of libunwind.
6
7 Permission is hereby granted, free of charge, to any person obtaining
8 a copy of this software and associated documentation files (the
9 "Software"), to deal in the Software without restriction, including
10 without limitation the rights to use, copy, modify, merge, publish,
11 distribute, sublicense, and/or sell copies of the Software, and to
12 permit persons to whom the Software is furnished to do so, subject to
13 the following conditions:
14
15 The above copyright notice and this permission notice shall be
16 included in all copies or substantial portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH 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
42 typedef struct
43 {
44 /* no hppa-specific fast trace */
45 }
46 unw_tdep_frame_t;
47
48 struct 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
66 struct 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
94 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)95 dwarf_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, sizeof(unw_fpreg_t)))
100 return -1;
101
102 *val = *addr;
103 return 0;
104 /* End of ANDROID update. */
105 }
106
107 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)108 dwarf_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, sizeof(unw_fpreg_t)))
113 return -1;
114
115 *addr = val;
116 return 0;
117 /* End of ANDROID update. */
118 }
119
120 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)121 dwarf_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
131 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)132 dwarf_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
156 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)157 dwarf_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
179 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)180 dwarf_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
202 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)203 dwarf_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
222 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)223 dwarf_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
280 extern int tdep_init_done;
281
282 extern void tdep_init (void);
283 extern 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);
286 extern void *tdep_uc_addr (ucontext_t *uc, int reg);
287 /* ANDROID support update. */
288 extern 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, void *as_arg);
292 /* End of ANDROID update. */
293 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
294 unw_word_t *valp, int write);
295 extern 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