1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2006-2007 IBM 3 Contributed by 4 Corey Ashford <cjashfor (at) us.ibm.com> 5 Jose Flavio Aguilar Paulino <jflavio (at) br.ibm.com> <joseflavio (at) gmail.com> 6 7 Copied from libunwind-x86_64.h, modified slightly for building 8 frysk successfully on ppc64, by Wu Zhou <woodzltc (at) cn.ibm.com> 9 Will be replaced when libunwind is ready on ppc64 platform. 10 11 This file is part of libunwind. 12 13 Permission is hereby granted, free of charge, to any person obtaining 14 a copy of this software and associated documentation files (the 15 "Software"), to deal in the Software without restriction, including 16 without limitation the rights to use, copy, modify, merge, publish, 17 distribute, sublicense, and/or sell copies of the Software, and to 18 permit persons to whom the Software is furnished to do so, subject to 19 the following conditions: 20 21 The above copyright notice and this permission notice shall be 22 included in all copies or substantial portions of the Software. 23 24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 28 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 29 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 30 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 31 32 #ifndef PPC32_LIBUNWIND_I_H 33 #define PPC32_LIBUNWIND_I_H 34 35 /* Target-dependent definitions that are internal to libunwind but need 36 to be shared with target-independent code. */ 37 38 #include <stdlib.h> 39 #include <libunwind.h> 40 41 #include "elf32.h" 42 /* ANDROID support update. */ 43 #include "map_info.h" 44 /* End of ANDROID update. */ 45 #include "mempool.h" 46 #include "dwarf.h" 47 48 typedef struct 49 { 50 /* no ppc32-specific fast trace */ 51 } 52 unw_tdep_frame_t; 53 54 struct unw_addr_space 55 { 56 struct unw_accessors acc; 57 unw_caching_policy_t caching_policy; 58 #ifdef HAVE_ATOMIC_OPS_H 59 AO_t cache_generation; 60 #else 61 uint32_t cache_generation; 62 #endif 63 unw_word_t dyn_generation; /* see dyn-common.h */ 64 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */ 65 struct dwarf_rs_cache global_cache; 66 struct unw_debug_frame_list *debug_frames; 67 int validate; 68 /* ANDROID support update. */ 69 struct map_info *map_list; 70 /* End of ANDROID update. */ 71 }; 72 73 struct cursor 74 { 75 struct dwarf_cursor dwarf; /* must be first */ 76 77 /* Format of sigcontext structure and address at which it is 78 stored: */ 79 enum 80 { 81 PPC_SCF_NONE, /* no signal frame encountered */ 82 PPC_SCF_LINUX_RT_SIGFRAME /* POSIX ucontext_t */ 83 } 84 sigcontext_format; 85 unw_word_t sigcontext_addr; 86 }; 87 88 #define DWARF_GET_LOC(l) ((l).val) 89 90 #ifdef UNW_LOCAL_ONLY 91 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 92 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0) 93 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) }) 94 # define DWARF_IS_REG_LOC(l) 0 95 # define DWARF_IS_FP_LOC(l) 0 96 # define DWARF_IS_V_LOC(l) 0 97 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 98 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 99 tdep_uc_addr((c)->as_arg, (r)), 0)) 100 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 101 tdep_uc_addr((c)->as_arg, (r)), 0)) 102 # define DWARF_VREG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 103 tdep_uc_addr((c)->as_arg, (r)), 0)) 104 #else /* !UNW_LOCAL_ONLY */ 105 106 # define DWARF_LOC_TYPE_FP (1 << 0) 107 # define DWARF_LOC_TYPE_REG (1 << 1) 108 # define DWARF_LOC_TYPE_V (1 << 2) 109 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 110 # define DWARF_IS_NULL_LOC(l) \ 111 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 112 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 113 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 114 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 115 # define DWARF_IS_V_LOC(l) (((l).type & DWARF_LOC_TYPE_V) != 0) 116 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 117 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 118 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 119 | DWARF_LOC_TYPE_FP)) 120 # define DWARF_VREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 121 | DWARF_LOC_TYPE_V)) 122 123 #endif /* !UNW_LOCAL_ONLY */ 124 125 static inline int 126 dwarf_getvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val) 127 { 128 unw_word_t *valp = (unw_word_t *) val; 129 unw_word_t addr; 130 int ret; 131 132 if (DWARF_IS_NULL_LOC (loc)) 133 return -UNW_EBADREG; 134 135 assert (DWARF_IS_V_LOC (loc)); 136 assert (!DWARF_IS_FP_LOC (loc)); 137 138 if (DWARF_IS_REG_LOC (loc)) 139 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 140 val, 0, c->as_arg); 141 142 addr = DWARF_GET_LOC (loc); 143 144 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp, 145 0, c->as_arg)) < 0) 146 return ret; 147 148 return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 0, c->as_arg); 149 } 150 151 static inline int 152 dwarf_putvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 153 { 154 unw_word_t *valp = (unw_word_t *) & val; 155 unw_word_t addr; 156 int ret; 157 158 if (DWARF_IS_NULL_LOC (loc)) 159 return -UNW_EBADREG; 160 161 assert (DWARF_IS_V_LOC (loc)); 162 assert (!DWARF_IS_FP_LOC (loc)); 163 164 if (DWARF_IS_REG_LOC (loc)) 165 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 166 &val, 1, c->as_arg); 167 168 addr = DWARF_GET_LOC (loc); 169 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp, 170 1, c->as_arg)) < 0) 171 return ret; 172 173 return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 1, c->as_arg); 174 } 175 176 static inline int 177 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val) 178 { 179 unw_word_t *valp = (unw_word_t *) val; 180 unw_word_t addr; 181 182 if (DWARF_IS_NULL_LOC (loc)) 183 return -UNW_EBADREG; 184 185 assert (DWARF_IS_FP_LOC (loc)); 186 assert (!DWARF_IS_V_LOC (loc)); 187 188 if (DWARF_IS_REG_LOC (loc)) 189 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 190 val, 0, c->as_arg); 191 192 addr = DWARF_GET_LOC (loc); 193 return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 0, c->as_arg); 194 195 } 196 197 static inline int 198 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 199 { 200 unw_word_t *valp = (unw_word_t *) & val; 201 unw_word_t addr; 202 203 if (DWARF_IS_NULL_LOC (loc)) 204 return -UNW_EBADREG; 205 206 assert (DWARF_IS_FP_LOC (loc)); 207 assert (!DWARF_IS_V_LOC (loc)); 208 209 if (DWARF_IS_REG_LOC (loc)) 210 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 211 &val, 1, c->as_arg); 212 213 addr = DWARF_GET_LOC (loc); 214 215 return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 1, c->as_arg); 216 } 217 218 static inline int 219 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t * val) 220 { 221 if (DWARF_IS_NULL_LOC (loc)) 222 return -UNW_EBADREG; 223 224 /* If a code-generator were to save a value of type unw_word_t in a 225 floating-point register, we would have to support this case. I 226 suppose it could happen with MMX registers, but does it really 227 happen? */ 228 assert (!DWARF_IS_FP_LOC (loc)); 229 assert (!DWARF_IS_V_LOC (loc)); 230 231 if (DWARF_IS_REG_LOC (loc)) 232 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 233 0, c->as_arg); 234 else 235 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 236 0, c->as_arg); 237 } 238 239 static inline int 240 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 241 { 242 if (DWARF_IS_NULL_LOC (loc)) 243 return -UNW_EBADREG; 244 245 /* If a code-generator were to save a value of type unw_word_t in a 246 floating-point register, we would have to support this case. I 247 suppose it could happen with MMX registers, but does it really 248 happen? */ 249 assert (!DWARF_IS_FP_LOC (loc)); 250 assert (!DWARF_IS_V_LOC (loc)); 251 252 if (DWARF_IS_REG_LOC (loc)) 253 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 254 1, c->as_arg); 255 else 256 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 257 1, c->as_arg); 258 } 259 260 #define tdep_getcontext_trace unw_getcontext 261 #define tdep_init_done UNW_OBJ(init_done) 262 #define tdep_init UNW_OBJ(init) 263 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define 264 tdep_search_unwind_table. */ 265 #define tdep_search_unwind_table dwarf_search_unwind_table 266 #define tdep_find_unwind_table dwarf_find_unwind_table 267 #define tdep_uc_addr UNW_ARCH_OBJ(uc_addr) 268 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 269 #define tdep_access_reg UNW_OBJ(access_reg) 270 #define tdep_access_fpreg UNW_OBJ(access_fpreg) 271 #define tdep_fetch_frame(c,ip,n) do {} while(0) 272 #define tdep_cache_frame(c,rs) do {} while(0) 273 #define tdep_reuse_frame(c,rs) do {} while(0) 274 #define tdep_stash_frame(c,rs) do {} while(0) 275 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO) 276 #define tdep_get_func_addr UNW_OBJ(get_func_addr) 277 278 #ifdef UNW_LOCAL_ONLY 279 # define tdep_find_proc_info(c,ip,n) \ 280 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 281 (c)->as_arg) 282 # define tdep_put_unwind_info(as,pi,arg) \ 283 dwarf_put_unwind_info((as), (pi), (arg)) 284 #else 285 # define tdep_find_proc_info(c,ip,n) \ 286 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 287 (c)->as_arg) 288 # define tdep_put_unwind_info(as,pi,arg) \ 289 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 290 #endif 291 292 extern int tdep_fetch_proc_info_post (struct dwarf_cursor *c, unw_word_t ip, 293 int need_unwind_info); 294 295 #define tdep_get_as(c) ((c)->dwarf.as) 296 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 297 #define tdep_get_ip(c) ((c)->dwarf.ip) 298 #define tdep_big_endian(as) 1 299 300 extern int tdep_init_done; 301 302 extern void tdep_init (void); 303 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 304 unw_dyn_info_t * di, 305 unw_proc_info_t * pi, 306 int need_unwind_info, void *arg); 307 extern void *tdep_uc_addr (ucontext_t * uc, int reg); 308 /* ANDROID support update. */ 309 extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei, 310 pid_t pid, unw_word_t ip, 311 unsigned long *segbase, unsigned long *mapoff, 312 char **path, void *as_arg); 313 /* End of ANDROID update. */ 314 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 315 unw_word_t * valp, int write); 316 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 317 unw_fpreg_t * valp, int write); 318 extern int tdep_get_func_addr (unw_addr_space_t as, unw_word_t addr, 319 unw_word_t *entry_point); 320 321 #endif /* PPC64_LIBUNWIND_I_H */ 322
