1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 CodeSourcery 3 4 This file is part of libunwind. 5 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: 13 14 The above copyright notice and this permission notice shall be 15 included in all copies or substantial portions of the Software. 16 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. */ 24 25 #ifndef ARM_LIBUNWIND_I_H 26 #define ARM_LIBUNWIND_I_H 27 28 /* Target-dependent definitions that are internal to libunwind but need 29 to be shared with target-independent code. */ 30 31 #include <stdlib.h> 32 #include <libunwind.h> 33 34 #include "elf32.h" 35 /* ANDROID support update. */ 36 #include "map_info.h" 37 /* End of ANDROID update. */ 38 #include "mempool.h" 39 #include "dwarf.h" 40 #include "ex_tables.h" 41 42 typedef struct 43 { 44 /* no arm-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 ARM_SCF_NONE, /* no signal frame */ 73 ARM_SCF_LINUX_SIGFRAME, /* non-RT signal frame, kernel >=2.6.18 */ 74 ARM_SCF_LINUX_RT_SIGFRAME, /* RT signal frame, kernel >=2.6.18 */ 75 ARM_SCF_LINUX_OLD_SIGFRAME, /* non-RT signal frame, kernel < 2.6.18 */ 76 ARM_SCF_LINUX_OLD_RT_SIGFRAME /* RT signal frame, kernel < 2.6.18 */ 77 } 78 sigcontext_format; 79 unw_word_t sigcontext_addr; 80 unw_word_t sigcontext_sp; 81 unw_word_t sigcontext_pc; 82 }; 83 84 #define DWARF_GET_LOC(l) ((l).val) 85 86 #ifdef UNW_LOCAL_ONLY 87 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 88 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0) 89 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) }) 90 # define DWARF_IS_REG_LOC(l) 0 91 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 92 tdep_uc_addr((c)->as_arg, (r)), 0)) 93 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 94 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 95 tdep_uc_addr((c)->as_arg, (r)), 0)) 96 97 static inline int 98 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 99 { 100 /* ANDROID support update. */ 101 unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc); 102 if (!addr || !map_local_is_readable ((unw_word_t) (uintptr_t) addr)) 103 return -1; 104 105 *val = *addr; 106 return 0; 107 /* End of ANDROID update. */ 108 } 109 110 static inline int 111 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 112 { 113 /* ANDROID support update. */ 114 unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc); 115 if (!addr || !map_local_is_writable ((unw_word_t) (uintptr_t) addr)) 116 return -1; 117 118 *addr = val; 119 return 0; 120 /* End of ANDROID update. */ 121 } 122 123 static inline int 124 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 125 { 126 /* ANDROID support update. */ 127 if (!DWARF_GET_LOC (loc)) 128 return -1; 129 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 130 0, c->as_arg); 131 /* End of ANDROID update. */ 132 } 133 134 static inline int 135 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 136 { 137 /* ANDROID support update. */ 138 if (!DWARF_GET_LOC (loc)) 139 return -1; 140 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 141 1, c->as_arg); 142 /* End of ANDROID update. */ 143 } 144 145 #else /* !UNW_LOCAL_ONLY */ 146 # define DWARF_LOC_TYPE_FP (1 << 0) 147 # define DWARF_LOC_TYPE_REG (1 << 1) 148 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 149 # define DWARF_IS_NULL_LOC(l) \ 150 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 151 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 152 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 153 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 154 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 155 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 156 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 157 | DWARF_LOC_TYPE_FP)) 158 159 static inline int 160 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 161 { 162 char *valp = (char *) &val; 163 unw_word_t addr; 164 int ret; 165 166 if (DWARF_IS_NULL_LOC (loc)) 167 return -UNW_EBADREG; 168 169 if (DWARF_IS_REG_LOC (loc)) 170 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 171 val, 0, c->as_arg); 172 173 addr = DWARF_GET_LOC (loc); 174 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 175 0, c->as_arg)) < 0) 176 return ret; 177 178 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0, 179 c->as_arg); 180 } 181 182 static inline int 183 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 184 { 185 char *valp = (char *) &val; 186 unw_word_t addr; 187 int ret; 188 189 if (DWARF_IS_NULL_LOC (loc)) 190 return -UNW_EBADREG; 191 192 if (DWARF_IS_REG_LOC (loc)) 193 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 194 &val, 1, c->as_arg); 195 196 addr = DWARF_GET_LOC (loc); 197 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 198 1, c->as_arg)) < 0) 199 return ret; 200 201 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 202 1, c->as_arg); 203 } 204 205 static inline int 206 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 207 { 208 if (DWARF_IS_NULL_LOC (loc)) 209 return -UNW_EBADREG; 210 211 /* If a code-generator were to save a value of type unw_word_t in a 212 floating-point register, we would have to support this case. I 213 suppose it could happen with MMX registers, but does it really 214 happen? */ 215 assert (!DWARF_IS_FP_LOC (loc)); 216 217 if (DWARF_IS_REG_LOC (loc)) 218 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 219 0, c->as_arg); 220 else 221 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 222 0, c->as_arg); 223 } 224 225 static inline int 226 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 227 { 228 if (DWARF_IS_NULL_LOC (loc)) 229 return -UNW_EBADREG; 230 231 /* If a code-generator were to save a value of type unw_word_t in a 232 floating-point register, we would have to support this case. I 233 suppose it could happen with MMX registers, but does it really 234 happen? */ 235 assert (!DWARF_IS_FP_LOC (loc)); 236 237 if (DWARF_IS_REG_LOC (loc)) 238 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 239 1, c->as_arg); 240 else 241 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 242 1, c->as_arg); 243 } 244 245 #endif /* !UNW_LOCAL_ONLY */ 246 247 #define tdep_getcontext_trace unw_getcontext 248 #define tdep_init_done UNW_OBJ(init_done) 249 #define tdep_init UNW_OBJ(init) 250 #define arm_find_proc_info UNW_OBJ(find_proc_info) 251 #define arm_put_unwind_info UNW_OBJ(put_unwind_info) 252 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define 253 tdep_search_unwind_table. */ 254 #define tdep_search_unwind_table UNW_OBJ(search_unwind_table) 255 #define tdep_find_unwind_table dwarf_find_unwind_table 256 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr) 257 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 258 #define tdep_access_reg UNW_OBJ(access_reg) 259 #define tdep_access_fpreg UNW_OBJ(access_fpreg) 260 #define tdep_fetch_frame(c,ip,n) do {} while(0) 261 #define tdep_cache_frame(c,rs) do {} while(0) 262 #define tdep_reuse_frame(c,rs) do {} while(0) 263 #define tdep_stash_frame(c,rs) do {} while(0) 264 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO) 265 266 #ifdef UNW_LOCAL_ONLY 267 # define tdep_find_proc_info(c,ip,n) \ 268 arm_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 269 (c)->as_arg) 270 # define tdep_put_unwind_info(as,pi,arg) \ 271 arm_put_unwind_info((as), (pi), (arg)) 272 #else 273 # define tdep_find_proc_info(c,ip,n) \ 274 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 275 (c)->as_arg) 276 # define tdep_put_unwind_info(as,pi,arg) \ 277 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 278 #endif 279 280 #define tdep_get_as(c) ((c)->dwarf.as) 281 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 282 #define tdep_get_ip(c) ((c)->dwarf.ip) 283 #define tdep_big_endian(as) ((as)->big_endian) 284 285 extern int tdep_init_done; 286 287 extern void tdep_init (void); 288 extern int arm_find_proc_info (unw_addr_space_t as, unw_word_t ip, 289 unw_proc_info_t *pi, int need_unwind_info, 290 void *arg); 291 extern void arm_put_unwind_info (unw_addr_space_t as, 292 unw_proc_info_t *pi, void *arg); 293 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 294 unw_dyn_info_t *di, unw_proc_info_t *pi, 295 int need_unwind_info, void *arg); 296 extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg); 297 /* ANDROID support update. */ 298 extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei, 299 pid_t pid, unw_word_t ip, 300 unsigned long *segbase, unsigned long *mapoff, 301 char **path, void *as_arg); 302 /* End of ANDROID update. */ 303 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 304 unw_word_t *valp, int write); 305 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 306 unw_fpreg_t *valp, int write); 307 308 /* unwinding method selection support */ 309 #define UNW_ARM_METHOD_ALL 0xFF 310 #define UNW_ARM_METHOD_DWARF 0x01 311 #define UNW_ARM_METHOD_FRAME 0x02 312 #define UNW_ARM_METHOD_EXIDX 0x04 313 /* ANDROID support update. */ 314 #define UNW_ARM_METHOD_LR 0x08 315 /* End of ANDROID update. */ 316 317 #define unwi_unwind_method UNW_OBJ(unwind_method) 318 extern int unwi_unwind_method; 319 320 #define UNW_TRY_METHOD(x) (unwi_unwind_method & x) 321 322 #endif /* ARM_LIBUNWIND_I_H */ 323
