1 /* libunwind - a platform-independent unwind library
2 Copyright (C) 2008 CodeSourcery
4 This file is part of libunwind.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice shall be
15 included in all copies or substantial portions of the Software.
17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
25 #ifndef ARM_LIBUNWIND_I_H
26 #define ARM_LIBUNWIND_I_H
28 /* Target-dependent definitions that are internal to libunwind but need
29 to be shared with target-independent code. */
32 #include <libunwind.h>
37 #include "ex_tables.h"
41 /* no arm-specific fast trace */
47 struct unw_accessors acc;
49 unw_caching_policy_t caching_policy;
50 #ifdef HAVE_ATOMIC_OPS_H
51 AO_t cache_generation;
53 uint32_t cache_generation;
55 unw_word_t dyn_generation; /* see dyn-common.h */
56 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */
57 struct dwarf_rs_cache global_cache;
58 struct unw_debug_frame_list *debug_frames;
63 struct dwarf_cursor dwarf; /* must be first */
66 ARM_SCF_NONE, /* no signal frame */
67 ARM_SCF_LINUX_SIGFRAME, /* non-RT signal frame, kernel >=2.6.18 */
68 ARM_SCF_LINUX_RT_SIGFRAME, /* RT signal frame, kernel >=2.6.18 */
69 ARM_SCF_LINUX_OLD_SIGFRAME, /* non-RT signal frame, kernel < 2.6.18 */
70 ARM_SCF_LINUX_OLD_RT_SIGFRAME /* RT signal frame, kernel < 2.6.18 */
73 unw_word_t sigcontext_addr;
74 unw_word_t sigcontext_sp;
75 unw_word_t sigcontext_pc;
78 #define DWARF_GET_LOC(l) ((l).val)
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))
92 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
94 if (!DWARF_GET_LOC (loc))
96 *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
101 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
103 if (!DWARF_GET_LOC (loc))
105 *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
110 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
112 if (!DWARF_GET_LOC (loc))
114 *val = *(unw_word_t *) DWARF_GET_LOC (loc);
119 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
121 if (!DWARF_GET_LOC (loc))
123 *(unw_word_t *) DWARF_GET_LOC (loc) = val;
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))
142 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
144 char *valp = (char *) &val;
148 if (DWARF_IS_NULL_LOC (loc))
151 if (DWARF_IS_REG_LOC (loc))
152 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
155 addr = DWARF_GET_LOC (loc);
156 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
160 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
165 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
167 char *valp = (char *) &val;
171 if (DWARF_IS_NULL_LOC (loc))
174 if (DWARF_IS_REG_LOC (loc))
175 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
178 addr = DWARF_GET_LOC (loc);
179 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
183 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
188 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
190 if (DWARF_IS_NULL_LOC (loc))
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
197 assert (!DWARF_IS_FP_LOC (loc));
199 if (DWARF_IS_REG_LOC (loc))
200 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
203 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
208 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
210 if (DWARF_IS_NULL_LOC (loc))
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
217 assert (!DWARF_IS_FP_LOC (loc));
219 if (DWARF_IS_REG_LOC (loc))
220 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
223 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
227 #endif /* !UNW_LOCAL_ONLY */
229 #define tdep_getcontext_trace unw_getcontext
230 #define tdep_init_done UNW_OBJ(init_done)
231 #define tdep_init UNW_OBJ(init)
232 #define arm_find_proc_info UNW_OBJ(find_proc_info)
233 #define arm_put_unwind_info UNW_OBJ(put_unwind_info)
234 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define
235 tdep_search_unwind_table. */
236 #define tdep_search_unwind_table UNW_OBJ(search_unwind_table)
237 #define tdep_find_unwind_table dwarf_find_unwind_table
238 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr)
239 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image)
240 #define tdep_access_reg UNW_OBJ(access_reg)
241 #define tdep_access_fpreg UNW_OBJ(access_fpreg)
242 #define tdep_fetch_frame(c,ip,n) do {} while(0)
243 #define tdep_cache_frame(c,rs) do {} while(0)
244 #define tdep_reuse_frame(c,rs) do {} while(0)
245 #define tdep_stash_frame(c,rs) do {} while(0)
246 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO)
248 #ifdef UNW_LOCAL_ONLY
249 # define tdep_find_proc_info(c,ip,n) \
250 arm_find_proc_info((c)->as, (ip), &(c)->pi, (n), \
252 # define tdep_put_unwind_info(as,pi,arg) \
253 arm_put_unwind_info((as), (pi), (arg))
255 # define tdep_find_proc_info(c,ip,n) \
256 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \
258 # define tdep_put_unwind_info(as,pi,arg) \
259 (*(as)->acc.put_unwind_info)((as), (pi), (arg))
262 #define tdep_get_as(c) ((c)->dwarf.as)
263 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg)
264 #define tdep_get_ip(c) ((c)->dwarf.ip)
265 #define tdep_big_endian(as) ((as)->big_endian)
267 extern int tdep_init_done;
269 extern void tdep_init (void);
270 extern int arm_find_proc_info (unw_addr_space_t as, unw_word_t ip,
271 unw_proc_info_t *pi, int need_unwind_info,
273 extern void arm_put_unwind_info (unw_addr_space_t as,
274 unw_proc_info_t *pi, void *arg);
275 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
276 unw_dyn_info_t *di, unw_proc_info_t *pi,
277 int need_unwind_info, void *arg);
278 extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
279 extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
280 unsigned long *segbase, unsigned long *mapoff,
281 char *path, size_t pathlen);
282 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
283 unw_word_t *valp, int write);
284 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
285 unw_fpreg_t *valp, int write);
287 /* unwinding method selection support */
288 #define UNW_ARM_METHOD_ALL 0xFF
289 #define UNW_ARM_METHOD_DWARF 0x01
290 #define UNW_ARM_METHOD_FRAME 0x02
291 #define UNW_ARM_METHOD_EXIDX 0x04
293 #define unwi_unwind_method UNW_OBJ(unwind_method)
294 extern int unwi_unwind_method;
296 #define UNW_TRY_METHOD(x) (unwi_unwind_method & x)
298 #endif /* ARM_LIBUNWIND_I_H */