1 /* libunwind - a platform-independent unwind library
2 Copyright (C) 2008 CodeSourcery
3 Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.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 SH_LIBUNWIND_I_H
27 #define SH_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 sh-specific fast trace */
45 }
46 unw_tdep_frame_t;
47
48 struct unw_addr_space
49 {
50 struct unw_accessors acc;
51 int big_endian;
52 unw_caching_policy_t caching_policy;
53 #ifdef HAVE_ATOMIC_OPS_H
54 AO_t cache_generation;
55 #else
56 uint32_t cache_generation;
57 #endif
58 unw_word_t dyn_generation; /* see dyn-common.h */
59 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */
60 struct dwarf_rs_cache global_cache;
61 struct unw_debug_frame_list *debug_frames;
62 /* ANDROID support update. */
63 struct map_info *map_list;
64 /* End of ANDROID update. */
65 };
66
67 struct cursor
68 {
69 struct dwarf_cursor dwarf; /* must be first */
70 enum
71 {
72 SH_SCF_NONE, /* no signal frame */
73 SH_SCF_LINUX_SIGFRAME, /* non-RT signal frame */
74 SH_SCF_LINUX_RT_SIGFRAME, /* RT signal frame */
75 }
76 sigcontext_format;
77 unw_word_t sigcontext_addr;
78 unw_word_t sigcontext_sp;
79 unw_word_t sigcontext_pc;
80 };
81
82 #define DWARF_GET_LOC(l) ((l).val)
83
84 #ifdef UNW_LOCAL_ONLY
85 # define DWARF_NULL_LOC DWARF_LOC (0, 0)
86 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0)
87 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) })
88 # define DWARF_IS_REG_LOC(l) 0
89 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \
90 tdep_uc_addr((c)->as_arg, (r)), 0))
91 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
92 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \
93 tdep_uc_addr((c)->as_arg, (r)), 0))
94
95 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)96 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
97 {
98 /* ANDROID support update. */
99 unw_fpreg_t *addr = (unw_fpreg_t *) DWARF_GET_LOC (loc);
100 if (!addr || !map_local_is_readable ((unw_word_t) addr, sizeof(unw_fpreg_t)))
101 return -1;
102
103 *val = *addr;
104 return 0;
105 /* End of ANDROID update. */
106 }
107
108 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)109 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
110 {
111 /* ANDROID support update. */
112 unw_fpreg_t *addr = (unw_fpreg_t *) DWARF_GET_LOC (loc);
113 if (!addr || !map_local_is_writable ((unw_word_t) addr, sizeof(unw_fpreg_t)))
114 return -1;
115
116 *addr = val;
117 return 0;
118 /* End of ANDROID update. */
119 }
120
121 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)122 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
123 {
124 /* ANDROID support update. */
125 if (!DWARF_GET_LOC (loc))
126 return -1;
127 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
128 0, c->as_arg);
129 /* End of ANDROID update. */
130 }
131
132 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)133 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
134 {
135 /* ANDROID support update. */
136 if (!DWARF_GET_LOC (loc))
137 return -1;
138 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
139 1, c->as_arg);
140 /* End of ANDROID update. */
141 }
142
143 #else /* !UNW_LOCAL_ONLY */
144 # define DWARF_LOC_TYPE_FP (1 << 0)
145 # define DWARF_LOC_TYPE_REG (1 << 1)
146 # define DWARF_NULL_LOC DWARF_LOC (0, 0)
147 # define DWARF_IS_NULL_LOC(l) \
148 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
149 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) })
150 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0)
151 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0)
152 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG)
153 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
154 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \
155 | DWARF_LOC_TYPE_FP))
156
157 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)158 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
159 {
160 char *valp = (char *) &val;
161 unw_word_t addr;
162 int ret;
163
164 if (DWARF_IS_NULL_LOC (loc))
165 return -UNW_EBADREG;
166
167 if (DWARF_IS_REG_LOC (loc))
168 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
169 val, 0, c->as_arg);
170
171 addr = DWARF_GET_LOC (loc);
172 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
173 0, c->as_arg)) < 0)
174 return ret;
175
176 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
177 c->as_arg);
178 }
179
180 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)181 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
182 {
183 char *valp = (char *) &val;
184 unw_word_t addr;
185 int ret;
186
187 if (DWARF_IS_NULL_LOC (loc))
188 return -UNW_EBADREG;
189
190 if (DWARF_IS_REG_LOC (loc))
191 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
192 &val, 1, c->as_arg);
193
194 addr = DWARF_GET_LOC (loc);
195 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
196 1, c->as_arg)) < 0)
197 return ret;
198
199 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
200 1, c->as_arg);
201 }
202
203 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)204 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
205 {
206 if (DWARF_IS_NULL_LOC (loc))
207 return -UNW_EBADREG;
208
209 /* If a code-generator were to save a value of type unw_word_t in a
210 floating-point register, we would have to support this case. I
211 suppose it could happen with MMX registers, but does it really
212 happen? */
213 assert (!DWARF_IS_FP_LOC (loc));
214
215 if (DWARF_IS_REG_LOC (loc))
216 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
217 0, c->as_arg);
218 else
219 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
220 0, c->as_arg);
221 }
222
223 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)224 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
225 {
226 if (DWARF_IS_NULL_LOC (loc))
227 return -UNW_EBADREG;
228
229 /* If a code-generator were to save a value of type unw_word_t in a
230 floating-point register, we would have to support this case. I
231 suppose it could happen with MMX registers, but does it really
232 happen? */
233 assert (!DWARF_IS_FP_LOC (loc));
234
235 if (DWARF_IS_REG_LOC (loc))
236 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
237 1, c->as_arg);
238 else
239 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
240 1, c->as_arg);
241 }
242
243 #endif /* !UNW_LOCAL_ONLY */
244
245 #define tdep_getcontext_trace unw_getcontext
246 #define tdep_init_done UNW_OBJ(init_done)
247 #define tdep_init UNW_OBJ(init)
248 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define
249 tdep_search_unwind_table. */
250 #define tdep_search_unwind_table dwarf_search_unwind_table
251 #define tdep_find_unwind_table dwarf_find_unwind_table
252 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr)
253 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image)
254 #define tdep_access_reg UNW_OBJ(access_reg)
255 #define tdep_access_fpreg UNW_OBJ(access_fpreg)
256 #define tdep_fetch_frame(c,ip,n) do {} while(0)
257 #define tdep_cache_frame(c,rs) do {} while(0)
258 #define tdep_reuse_frame(c,rs) do {} while(0)
259 #define tdep_stash_frame(c,rs) do {} while(0)
260 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO)
261
262 #ifdef UNW_LOCAL_ONLY
263 # define tdep_find_proc_info(c,ip,n) \
264 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \
265 (c)->as_arg)
266 # define tdep_put_unwind_info(as,pi,arg) \
267 dwarf_put_unwind_info((as), (pi), (arg))
268 #else
269 # define tdep_find_proc_info(c,ip,n) \
270 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \
271 (c)->as_arg)
272 # define tdep_put_unwind_info(as,pi,arg) \
273 (*(as)->acc.put_unwind_info)((as), (pi), (arg))
274 #endif
275
276 #define tdep_get_as(c) ((c)->dwarf.as)
277 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg)
278 #define tdep_get_ip(c) ((c)->dwarf.ip)
279 #define tdep_big_endian(as) ((as)->big_endian)
280
281 extern int tdep_init_done;
282
283 extern void tdep_init (void);
284 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
285 unw_dyn_info_t *di, unw_proc_info_t *pi,
286 int need_unwind_info, void *arg);
287 extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
288 /* ANDROID support update. */
289 extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei,
290 pid_t pid, unw_word_t ip,
291 unsigned long *segbase, unsigned long *mapoff,
292 char **path, void *as_arg);
293 /* End of ANDROID update. */
294 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
295 unw_word_t *valp, int write);
296 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
297 unw_fpreg_t *valp, int write);
298
299 #endif /* SH_LIBUNWIND_I_H */
300