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 #include <stdatomic.h>
35
36 #include "elf32.h"
37 /* Add For Cache MAP And ELF */
38 #include "map_info.h"
39 /* Add For Cache MAP And ELF */
40 #include "mempool.h"
41 #include "dwarf.h"
42
43 typedef struct
44 {
45 /* no hppa-specific fast trace */
46 }
47 unw_tdep_frame_t;
48
49 struct unw_addr_space
50 {
51 struct unw_accessors acc;
52 unw_caching_policy_t caching_policy;
53 _Atomic uint32_t cache_generation;
54 unw_word_t dyn_generation; /* see dyn-common.h */
55 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */
56 struct dwarf_rs_cache global_cache;
57 struct unw_debug_frame_list *debug_frames;
58 /* Add For Cache MAP And ELF */
59 struct map_info *map_list;
60 /* Add For Cache MAP And ELF */
61 };
62
63 struct cursor
64 {
65 struct dwarf_cursor dwarf; /* must be first */
66
67 /* Format of sigcontext structure and address at which it is
68 stored: */
69 enum
70 {
71 HPPA_SCF_NONE, /* no signal frame encountered */
72 HPPA_SCF_LINUX_RT_SIGFRAME /* POSIX ucontext_t */
73 }
74 sigcontext_format;
75 unw_word_t sigcontext_addr;
76 };
77
78 #define DWARF_GET_LOC(l) ((l).val)
79
80 #ifdef UNW_LOCAL_ONLY
81 # define DWARF_NULL_LOC DWARF_LOC (0, 0)
82 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0)
83 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) })
84 # define DWARF_IS_REG_LOC(l) 0
85 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \
86 tdep_uc_addr((c)->as_arg, (r)), 0))
87 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
88 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \
89 tdep_uc_addr((c)->as_arg, (r)), 0))
90
91 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)92 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
93 {
94 if (!DWARF_GET_LOC (loc))
95 return -1;
96 *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
97 return 0;
98 }
99
100 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)101 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
102 {
103 if (!DWARF_GET_LOC (loc))
104 return -1;
105 *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
106 return 0;
107 }
108
109 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)110 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
111 {
112 if (!DWARF_GET_LOC (loc))
113 return -1;
114 *val = *(unw_word_t *) DWARF_GET_LOC (loc);
115 return 0;
116 }
117
118 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)119 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
120 {
121 if (!DWARF_GET_LOC (loc))
122 return -1;
123 *(unw_word_t *) DWARF_GET_LOC (loc) = val;
124 return 0;
125 }
126
127 #else /* !UNW_LOCAL_ONLY */
128 # define DWARF_LOC_TYPE_FP (1 << 0)
129 # define DWARF_LOC_TYPE_REG (1 << 1)
130 # define DWARF_NULL_LOC DWARF_LOC (0, 0)
131 # define DWARF_IS_NULL_LOC(l) \
132 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
133 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) })
134 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0)
135 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0)
136 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG)
137 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
138 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \
139 | DWARF_LOC_TYPE_FP))
140
141 static inline int
dwarf_getfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t * val)142 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
143 {
144 char *valp = (char *) &val;
145 unw_word_t addr;
146 int ret;
147
148 if (DWARF_IS_NULL_LOC (loc))
149 return -UNW_EBADREG;
150
151 if (DWARF_IS_REG_LOC (loc))
152 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
153 val, 0, c->as_arg);
154
155 addr = DWARF_GET_LOC (loc);
156 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
157 0, c->as_arg)) < 0)
158 return ret;
159
160 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
161 c->as_arg);
162 }
163
164 static inline int
dwarf_putfp(struct dwarf_cursor * c,dwarf_loc_t loc,unw_fpreg_t val)165 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
166 {
167 char *valp = (char *) &val;
168 unw_word_t addr;
169 int ret;
170
171 if (DWARF_IS_NULL_LOC (loc))
172 return -UNW_EBADREG;
173
174 if (DWARF_IS_REG_LOC (loc))
175 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
176 &val, 1, c->as_arg);
177
178 addr = DWARF_GET_LOC (loc);
179 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
180 1, c->as_arg)) < 0)
181 return ret;
182
183 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
184 1, c->as_arg);
185 }
186
187 static inline int
dwarf_get(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t * val)188 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
189 {
190 if (DWARF_IS_NULL_LOC (loc))
191 return -UNW_EBADREG;
192
193 /* If a code-generator were to save a value of type unw_word_t in a
194 floating-point register, we would have to support this case. I
195 suppose it could happen with MMX registers, but does it really
196 happen? */
197 assert (!DWARF_IS_FP_LOC (loc));
198
199 if (DWARF_IS_REG_LOC (loc))
200 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
201 0, c->as_arg);
202 else
203 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
204 0, c->as_arg);
205 }
206
207 static inline int
dwarf_put(struct dwarf_cursor * c,dwarf_loc_t loc,unw_word_t val)208 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
209 {
210 if (DWARF_IS_NULL_LOC (loc))
211 return -UNW_EBADREG;
212
213 /* If a code-generator were to save a value of type unw_word_t in a
214 floating-point register, we would have to support this case. I
215 suppose it could happen with MMX registers, but does it really
216 happen? */
217 assert (!DWARF_IS_FP_LOC (loc));
218
219 if (DWARF_IS_REG_LOC (loc))
220 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
221 1, c->as_arg);
222 else
223 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
224 1, c->as_arg);
225 }
226
227 #endif /* !UNW_LOCAL_ONLY */
228
229 #define tdep_getcontext_trace unw_getcontext
230 #define tdep_init_done UNW_OBJ(init_done)
231 #define tdep_init UNW_OBJ(init)
232 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define
233 tdep_search_unwind_table. */
234 #define tdep_search_unwind_table dwarf_search_unwind_table
235 #define tdep_find_unwind_table dwarf_find_unwind_table
236 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr)
237 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image)
238 #define tdep_get_exe_image_path UNW_ARCH_OBJ(get_exe_image_path)
239 #define tdep_access_reg UNW_OBJ(access_reg)
240 #define tdep_access_fpreg UNW_OBJ(access_fpreg)
241 #define tdep_fetch_frame(c,ip,n) do {} while(0)
242 #define tdep_cache_frame(c) 0
243 #define tdep_reuse_frame(c,frame) do {} while(0)
244 #define tdep_stash_frame(c,rs) do {} while(0)
245 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO)
246
247 #ifdef UNW_LOCAL_ONLY
248 # define tdep_find_proc_info(c,ip,n) \
249 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \
250 (c)->as_arg)
251 # define tdep_put_unwind_info(as,pi,arg) \
252 dwarf_put_unwind_info((as), (pi), (arg))
253 #else
254 # define tdep_find_proc_info(c,ip,n) \
255 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \
256 (c)->as_arg)
257 # define tdep_put_unwind_info(as,pi,arg) \
258 (*(as)->acc.put_unwind_info)((as), (pi), (arg))
259 #endif
260
261 #define tdep_get_as(c) ((c)->dwarf.as)
262 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg)
263 #define tdep_get_ip(c) ((c)->dwarf.ip)
264 #define tdep_big_endian(as) 1
265
266 extern atomic_bool tdep_init_done;
267
268 extern void tdep_init (void);
269 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
270 unw_dyn_info_t *di, unw_proc_info_t *pi,
271 int need_unwind_info, void *arg);
272 extern void *tdep_uc_addr (ucontext_t *uc, int reg);
273 /* Add For Cache MAP And ELF */
274 extern struct map_info *tdep_get_elf_image (unw_addr_space_t as, pid_t pid,
275 unw_word_t ip);
276 /* Add For Cache MAP And ELF */
277 extern void tdep_get_exe_image_path (char *path);
278 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
279 unw_word_t *valp, int write);
280 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
281 unw_fpreg_t *valp, int write);
282
283 #endif /* HPPA_LIBUNWIND_I_H */
284