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 MIPS_LIBUNWIND_I_H 26 #define MIPS_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 #if !defined(UNW_REMOTE_ONLY) && _MIPS_SIM == _ABI64 35 # include "elf64.h" 36 #else 37 # include "elf32.h" 38 #endif 39 /* ANDROID support update. */ 40 #include "map_info.h" 41 /* End of ANDROID update. */ 42 #include "mempool.h" 43 #include "dwarf.h" 44 45 typedef struct 46 { 47 /* no mips-specific fast trace */ 48 } 49 unw_tdep_frame_t; 50 51 struct unw_addr_space 52 { 53 struct unw_accessors acc; 54 55 int big_endian; 56 mips_abi_t abi; 57 unsigned int addr_size; 58 59 unw_caching_policy_t caching_policy; 60 #ifdef HAVE_ATOMIC_OPS_H 61 AO_t cache_generation; 62 #else 63 uint32_t cache_generation; 64 #endif 65 unw_word_t dyn_generation; /* see dyn-common.h */ 66 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */ 67 struct dwarf_rs_cache global_cache; 68 struct unw_debug_frame_list *debug_frames; 69 /* ANDROID support update. */ 70 struct map_info *map_list; 71 /* End of ANDROID update. */ 72 }; 73 74 #define tdep_big_endian(as) ((as)->big_endian) 75 76 struct cursor 77 { 78 struct dwarf_cursor dwarf; /* must be first */ 79 unw_word_t sigcontext_addr; 80 }; 81 82 #define DWARF_GET_LOC(l) ((l).val) 83 84 #ifndef UNW_REMOTE_ONLY 85 # if _MIPS_SIM == _ABIN32 86 typedef long long mips_reg_t; 87 # else 88 typedef long mips_reg_t; 89 # endif 90 #endif 91 92 #ifdef UNW_LOCAL_ONLY 93 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 94 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0) 95 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) }) 96 # define DWARF_IS_REG_LOC(l) 0 97 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) (intptr_t) \ 98 tdep_uc_addr((c)->as_arg, (r)), 0)) 99 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 100 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) (intptr_t) \ 101 tdep_uc_addr((c)->as_arg, (r)), 0)) 102 103 /* FIXME: Implement these for the MIPS FPU. */ 104 static inline int 105 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 106 { 107 /* ANDROID support update. */ 108 unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc); 109 if (!addr || !map_local_is_readable ((unw_word_t) (uintptr_t) addr)) 110 return -1; 111 112 *val = *addr; 113 return 0; 114 /* End of ANDROID update. */ 115 } 116 117 static inline int 118 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 119 { 120 /* ANDROID support update. */ 121 unw_fpreg_t *addr = (unw_fpreg_t *) (uintptr_t) DWARF_GET_LOC (loc); 122 if (!addr || !map_local_is_writable ((unw_word_t) (uintptr_t) addr)) 123 return -1; 124 125 *addr = val; 126 return 0; 127 /* End of ANDROID update. */ 128 } 129 130 static inline int 131 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 132 { 133 /* ANDROID support update. */ 134 mips_reg_t *addr = (mips_reg_t *) (uintptr_t) DWARF_GET_LOC (loc); 135 if (!addr || !map_local_is_readable ((unw_word_t) (uintptr_t) addr)) 136 return -1; 137 138 *val = *addr; 139 return 0; 140 /* End of ANDROID update. */ 141 } 142 143 static inline int 144 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 145 { 146 /* ANDROID support update. */ 147 mips_reg_t *addr = (mips_reg_t *) (uintptr_t) DWARF_GET_LOC (loc); 148 if (!addr || !map_local_is_writable ((unw_word_t) (uintptr_t) addr)) 149 return -1; 150 151 *addr = val; 152 return 0; 153 /* End of ANDROID update. */ 154 } 155 156 #else /* !UNW_LOCAL_ONLY */ 157 # define DWARF_LOC_TYPE_FP (1 << 0) 158 # define DWARF_LOC_TYPE_REG (1 << 1) 159 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 160 # define DWARF_IS_NULL_LOC(l) \ 161 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 162 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 163 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 164 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 165 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 166 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 167 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 168 | DWARF_LOC_TYPE_FP)) 169 170 static inline int 171 read_s32 (struct dwarf_cursor *c, unw_word_t addr, unw_word_t *val) 172 { 173 int offset = addr & 4; 174 int ret; 175 unw_word_t memval; 176 177 ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg); 178 if (ret < 0) 179 return ret; 180 181 if ((offset != 0) == tdep_big_endian (c->as)) 182 *val = (int32_t) memval; 183 else 184 *val = (int32_t) (memval >> 32); 185 186 return 0; 187 } 188 189 static inline int 190 write_s32 (struct dwarf_cursor *c, unw_word_t addr, const unw_word_t *val) 191 { 192 int offset = addr & 4; 193 int ret; 194 unw_word_t memval; 195 196 ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg); 197 if (ret < 0) 198 return ret; 199 200 if ((offset != 0) == tdep_big_endian (c->as)) 201 memval = (memval & ~0xffffffffLL) | (uint32_t) *val; 202 else 203 memval = (memval & 0xffffffffLL) | (uint32_t) (*val << 32); 204 205 return (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 1, c->as_arg); 206 } 207 208 /* FIXME: Implement these for the MIPS FPU. */ 209 static inline int 210 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 211 { 212 char *valp = (char *) &val; 213 unw_word_t addr; 214 int ret; 215 216 if (DWARF_IS_NULL_LOC (loc)) 217 return -UNW_EBADREG; 218 219 if (DWARF_IS_REG_LOC (loc)) 220 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 221 val, 0, c->as_arg); 222 223 addr = DWARF_GET_LOC (loc); 224 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 225 0, c->as_arg)) < 0) 226 return ret; 227 228 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0, 229 c->as_arg); 230 } 231 232 static inline int 233 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 234 { 235 char *valp = (char *) &val; 236 unw_word_t addr; 237 int ret; 238 239 if (DWARF_IS_NULL_LOC (loc)) 240 return -UNW_EBADREG; 241 242 if (DWARF_IS_REG_LOC (loc)) 243 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 244 &val, 1, c->as_arg); 245 246 addr = DWARF_GET_LOC (loc); 247 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 248 1, c->as_arg)) < 0) 249 return ret; 250 251 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 252 1, c->as_arg); 253 } 254 255 static inline int 256 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 257 { 258 if (DWARF_IS_NULL_LOC (loc)) 259 return -UNW_EBADREG; 260 261 /* If a code-generator were to save a value of type unw_word_t in a 262 floating-point register, we would have to support this case. I 263 suppose it could happen with MMX registers, but does it really 264 happen? */ 265 assert (!DWARF_IS_FP_LOC (loc)); 266 267 if (DWARF_IS_REG_LOC (loc)) 268 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 269 0, c->as_arg); 270 else if (c->as->abi == UNW_MIPS_ABI_O32) 271 return read_s32 (c, DWARF_GET_LOC (loc), val); 272 else 273 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 274 0, c->as_arg); 275 } 276 277 static inline int 278 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 279 { 280 if (DWARF_IS_NULL_LOC (loc)) 281 return -UNW_EBADREG; 282 283 /* If a code-generator were to save a value of type unw_word_t in a 284 floating-point register, we would have to support this case. I 285 suppose it could happen with MMX registers, but does it really 286 happen? */ 287 assert (!DWARF_IS_FP_LOC (loc)); 288 289 if (DWARF_IS_REG_LOC (loc)) 290 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 291 1, c->as_arg); 292 else if (c->as->abi == UNW_MIPS_ABI_O32) 293 return write_s32 (c, DWARF_GET_LOC (loc), &val); 294 else 295 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 296 1, c->as_arg); 297 } 298 299 #endif /* !UNW_LOCAL_ONLY */ 300 301 #define tdep_getcontext_trace unw_getcontext 302 #define tdep_init_done UNW_OBJ(init_done) 303 #define tdep_init UNW_OBJ(init) 304 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define 305 tdep_search_unwind_table. */ 306 #define tdep_search_unwind_table dwarf_search_unwind_table 307 #define tdep_find_unwind_table dwarf_find_unwind_table 308 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr) 309 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 310 #define tdep_access_reg UNW_OBJ(access_reg) 311 #define tdep_access_fpreg UNW_OBJ(access_fpreg) 312 #define tdep_fetch_frame(c,ip,n) do {} while(0) 313 #define tdep_cache_frame(c,rs) do {} while(0) 314 #define tdep_reuse_frame(c,rs) do {} while(0) 315 #define tdep_stash_frame(c,rs) do {} while(0) 316 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO) 317 318 #ifdef UNW_LOCAL_ONLY 319 # define tdep_find_proc_info(c,ip,n) \ 320 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 321 (c)->as_arg) 322 # define tdep_put_unwind_info(as,pi,arg) \ 323 dwarf_put_unwind_info((as), (pi), (arg)) 324 #else 325 # define tdep_find_proc_info(c,ip,n) \ 326 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 327 (c)->as_arg) 328 # define tdep_put_unwind_info(as,pi,arg) \ 329 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 330 #endif 331 332 #define tdep_get_as(c) ((c)->dwarf.as) 333 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 334 #define tdep_get_ip(c) ((c)->dwarf.ip) 335 336 extern int tdep_init_done; 337 338 extern void tdep_init (void); 339 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 340 unw_dyn_info_t *di, unw_proc_info_t *pi, 341 int need_unwind_info, void *arg); 342 extern void *tdep_uc_addr (ucontext_t *uc, int reg); 343 /* ANDROID support update. */ 344 extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei, 345 pid_t pid, unw_word_t ip, 346 unsigned long *segbase, unsigned long *mapoff, 347 char **path); 348 /* End of ANDROID update. */ 349 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 350 unw_word_t *valp, int write); 351 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 352 unw_fpreg_t *valp, int write); 353 354 #endif /* MIPS_LIBUNWIND_I_H */ 355
