libunwind_i.h revision 7d46a21e0a2cb561e4cad57b101a7137e01023dc
1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 CodeSourcery 3 4This file is part of libunwind. 5 6Permission is hereby granted, free of charge, to any person obtaining 7a copy of this software and associated documentation files (the 8"Software"), to deal in the Software without restriction, including 9without limitation the rights to use, copy, modify, merge, publish, 10distribute, sublicense, and/or sell copies of the Software, and to 11permit persons to whom the Software is furnished to do so, subject to 12the following conditions: 13 14The above copyright notice and this permission notice shall be 15included in all copies or substantial portions of the Software. 16 17THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 21LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23WITH 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 42typedef struct 43 { 44 /* no arm-specific fast trace */ 45 } 46unw_tdep_frame_t; 47 48struct 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 67struct 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 97static inline int 98dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 99{ 100 if (!DWARF_GET_LOC (loc)) 101 return -1; 102 *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc); 103 return 0; 104} 105 106static inline int 107dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 108{ 109 if (!DWARF_GET_LOC (loc)) 110 return -1; 111 *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val; 112 return 0; 113} 114 115static inline int 116dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 117{ 118 if (!DWARF_GET_LOC (loc)) 119 return -1; 120 *val = *(unw_word_t *) DWARF_GET_LOC (loc); 121 return 0; 122} 123 124static inline int 125dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 126{ 127 if (!DWARF_GET_LOC (loc)) 128 return -1; 129 *(unw_word_t *) DWARF_GET_LOC (loc) = val; 130 return 0; 131} 132 133#else /* !UNW_LOCAL_ONLY */ 134# define DWARF_LOC_TYPE_FP (1 << 0) 135# define DWARF_LOC_TYPE_REG (1 << 1) 136# define DWARF_NULL_LOC DWARF_LOC (0, 0) 137# define DWARF_IS_NULL_LOC(l) \ 138 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 139# define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 140# define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 141# define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 142# define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 143# define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 144# define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 145 | DWARF_LOC_TYPE_FP)) 146 147static inline int 148dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 149{ 150 char *valp = (char *) &val; 151 unw_word_t addr; 152 int ret; 153 154 if (DWARF_IS_NULL_LOC (loc)) 155 return -UNW_EBADREG; 156 157 if (DWARF_IS_REG_LOC (loc)) 158 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 159 val, 0, c->as_arg); 160 161 addr = DWARF_GET_LOC (loc); 162 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 163 0, c->as_arg)) < 0) 164 return ret; 165 166 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0, 167 c->as_arg); 168} 169 170static inline int 171dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 172{ 173 char *valp = (char *) &val; 174 unw_word_t addr; 175 int ret; 176 177 if (DWARF_IS_NULL_LOC (loc)) 178 return -UNW_EBADREG; 179 180 if (DWARF_IS_REG_LOC (loc)) 181 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 182 &val, 1, c->as_arg); 183 184 addr = DWARF_GET_LOC (loc); 185 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 186 1, c->as_arg)) < 0) 187 return ret; 188 189 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 190 1, c->as_arg); 191} 192 193static inline int 194dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 195{ 196 if (DWARF_IS_NULL_LOC (loc)) 197 return -UNW_EBADREG; 198 199 /* If a code-generator were to save a value of type unw_word_t in a 200 floating-point register, we would have to support this case. I 201 suppose it could happen with MMX registers, but does it really 202 happen? */ 203 assert (!DWARF_IS_FP_LOC (loc)); 204 205 if (DWARF_IS_REG_LOC (loc)) 206 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 207 0, c->as_arg); 208 else 209 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 210 0, c->as_arg); 211} 212 213static inline int 214dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 215{ 216 if (DWARF_IS_NULL_LOC (loc)) 217 return -UNW_EBADREG; 218 219 /* If a code-generator were to save a value of type unw_word_t in a 220 floating-point register, we would have to support this case. I 221 suppose it could happen with MMX registers, but does it really 222 happen? */ 223 assert (!DWARF_IS_FP_LOC (loc)); 224 225 if (DWARF_IS_REG_LOC (loc)) 226 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 227 1, c->as_arg); 228 else 229 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 230 1, c->as_arg); 231} 232 233#endif /* !UNW_LOCAL_ONLY */ 234 235#define tdep_getcontext_trace unw_getcontext 236#define tdep_init_done UNW_OBJ(init_done) 237#define tdep_init UNW_OBJ(init) 238#define arm_find_proc_info UNW_OBJ(find_proc_info) 239#define arm_put_unwind_info UNW_OBJ(put_unwind_info) 240/* Platforms that support UNW_INFO_FORMAT_TABLE need to define 241 tdep_search_unwind_table. */ 242#define tdep_search_unwind_table UNW_OBJ(search_unwind_table) 243#define tdep_find_unwind_table dwarf_find_unwind_table 244#define tdep_uc_addr UNW_ARCH_OBJ(uc_addr) 245#define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 246#define tdep_access_reg UNW_OBJ(access_reg) 247#define tdep_access_fpreg UNW_OBJ(access_fpreg) 248#define tdep_fetch_frame(c,ip,n) do {} while(0) 249#define tdep_cache_frame(c,rs) do {} while(0) 250#define tdep_reuse_frame(c,rs) do {} while(0) 251#define tdep_stash_frame(c,rs) do {} while(0) 252#define tdep_trace(cur,addr,n) (-UNW_ENOINFO) 253 254#ifdef UNW_LOCAL_ONLY 255# define tdep_find_proc_info(c,ip,n) \ 256 arm_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 257 (c)->as_arg) 258# define tdep_put_unwind_info(as,pi,arg) \ 259 arm_put_unwind_info((as), (pi), (arg)) 260#else 261# define tdep_find_proc_info(c,ip,n) \ 262 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 263 (c)->as_arg) 264# define tdep_put_unwind_info(as,pi,arg) \ 265 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 266#endif 267 268#define tdep_get_as(c) ((c)->dwarf.as) 269#define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 270#define tdep_get_ip(c) ((c)->dwarf.ip) 271#define tdep_big_endian(as) ((as)->big_endian) 272 273extern int tdep_init_done; 274 275extern void tdep_init (void); 276extern int arm_find_proc_info (unw_addr_space_t as, unw_word_t ip, 277 unw_proc_info_t *pi, int need_unwind_info, 278 void *arg); 279extern void arm_put_unwind_info (unw_addr_space_t as, 280 unw_proc_info_t *pi, void *arg); 281extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 282 unw_dyn_info_t *di, unw_proc_info_t *pi, 283 int need_unwind_info, void *arg); 284extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg); 285extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip, 286 unsigned long *segbase, unsigned long *mapoff, 287 char *path, size_t pathlen); 288extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 289 unw_word_t *valp, int write); 290extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 291 unw_fpreg_t *valp, int write); 292 293/* unwinding method selection support */ 294#define UNW_ARM_METHOD_ALL 0xFF 295#define UNW_ARM_METHOD_DWARF 0x01 296#define UNW_ARM_METHOD_FRAME 0x02 297#define UNW_ARM_METHOD_EXIDX 0x04 298/* ANDROID support update. */ 299#define UNW_ARM_METHOD_LR 0x08 300/* End of ANDROID update. */ 301 302#define unwi_unwind_method UNW_OBJ(unwind_method) 303extern int unwi_unwind_method; 304 305#define UNW_TRY_METHOD(x) (unwi_unwind_method & x) 306 307#endif /* ARM_LIBUNWIND_I_H */ 308