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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