libunwind_i.h revision cf8d5e41af582b9070576889dcc479397a19bf48
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#include "mempool.h" 36#include "dwarf.h" 37#include "ex_tables.h" 38 39struct unw_addr_space 40 { 41 struct unw_accessors acc; 42 int big_endian; 43 unw_caching_policy_t caching_policy; 44#ifdef HAVE_ATOMIC_OPS_H 45 AO_t cache_generation; 46#else 47 uint32_t cache_generation; 48#endif 49 unw_word_t dyn_generation; /* see dyn-common.h */ 50 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */ 51 struct dwarf_rs_cache global_cache; 52 struct unw_debug_frame_list *debug_frames; 53 }; 54 55struct cursor 56 { 57 struct dwarf_cursor dwarf; /* must be first */ 58 unw_word_t sigcontext_addr; 59 }; 60 61#define DWARF_GET_LOC(l) ((l).val) 62 63#ifdef UNW_LOCAL_ONLY 64# define DWARF_NULL_LOC DWARF_LOC (0, 0) 65# define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0) 66# define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) }) 67# define DWARF_IS_REG_LOC(l) 0 68# define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 69 tdep_uc_addr((c)->as_arg, (r)), 0)) 70# define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 71# define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 72 tdep_uc_addr((c)->as_arg, (r)), 0)) 73 74static inline int 75dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 76{ 77 if (!DWARF_GET_LOC (loc)) 78 return -1; 79 *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc); 80 return 0; 81} 82 83static inline int 84dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 85{ 86 if (!DWARF_GET_LOC (loc)) 87 return -1; 88 *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val; 89 return 0; 90} 91 92static inline int 93dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 94{ 95 if (!DWARF_GET_LOC (loc)) 96 return -1; 97 *val = *(unw_word_t *) DWARF_GET_LOC (loc); 98 return 0; 99} 100 101static inline int 102dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 103{ 104 if (!DWARF_GET_LOC (loc)) 105 return -1; 106 *(unw_word_t *) DWARF_GET_LOC (loc) = val; 107 return 0; 108} 109 110#else /* !UNW_LOCAL_ONLY */ 111# define DWARF_LOC_TYPE_FP (1 << 0) 112# define DWARF_LOC_TYPE_REG (1 << 1) 113# define DWARF_NULL_LOC DWARF_LOC (0, 0) 114# define DWARF_IS_NULL_LOC(l) \ 115 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 116# define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 117# define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 118# define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 119# define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 120# define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 121# define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 122 | DWARF_LOC_TYPE_FP)) 123 124static inline int 125dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 126{ 127 char *valp = (char *) &val; 128 unw_word_t addr; 129 int ret; 130 131 if (DWARF_IS_NULL_LOC (loc)) 132 return -UNW_EBADREG; 133 134 if (DWARF_IS_REG_LOC (loc)) 135 return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), 136 val, 0, c->as_arg); 137 138 addr = DWARF_GET_LOC (loc); 139 if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp, 140 0, c->as_arg)) < 0) 141 return ret; 142 143 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0, 144 c->as_arg); 145} 146 147static inline int 148dwarf_putfp (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, 1, 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 1, c->as_arg)) < 0) 164 return ret; 165 166 return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 167 1, c->as_arg); 168} 169 170static inline int 171dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 172{ 173 if (DWARF_IS_NULL_LOC (loc)) 174 return -UNW_EBADREG; 175 176 /* If a code-generator were to save a value of type unw_word_t in a 177 floating-point register, we would have to support this case. I 178 suppose it could happen with MMX registers, but does it really 179 happen? */ 180 assert (!DWARF_IS_FP_LOC (loc)); 181 182 if (DWARF_IS_REG_LOC (loc)) 183 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 184 0, c->as_arg); 185 else 186 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 187 0, c->as_arg); 188} 189 190static inline int 191dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 192{ 193 if (DWARF_IS_NULL_LOC (loc)) 194 return -UNW_EBADREG; 195 196 /* If a code-generator were to save a value of type unw_word_t in a 197 floating-point register, we would have to support this case. I 198 suppose it could happen with MMX registers, but does it really 199 happen? */ 200 assert (!DWARF_IS_FP_LOC (loc)); 201 202 if (DWARF_IS_REG_LOC (loc)) 203 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 204 1, c->as_arg); 205 else 206 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 207 1, c->as_arg); 208} 209 210#endif /* !UNW_LOCAL_ONLY */ 211 212#define tdep_needs_initialization UNW_OBJ(needs_initialization) 213#define tdep_init UNW_OBJ(init) 214/* Platforms that support UNW_INFO_FORMAT_TABLE need to define 215 tdep_search_unwind_table. */ 216#define tdep_search_unwind_table dwarf_search_unwind_table 217#define tdep_uc_addr UNW_ARCH_OBJ(uc_addr) 218#define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 219#define tdep_access_reg UNW_OBJ(access_reg) 220#define tdep_access_fpreg UNW_OBJ(access_fpreg) 221#define tdep_fetch_frame(c,ip,n) do {} while(0) 222#define tdep_cache_frame(c,rs) do {} while(0) 223#define tdep_reuse_frame(c,rs) do {} while(0) 224 225#ifdef UNW_LOCAL_ONLY 226# define tdep_find_proc_info(c,ip,n) \ 227 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 228 (c)->as_arg) 229# define tdep_put_unwind_info(as,pi,arg) \ 230 dwarf_put_unwind_info((as), (pi), (arg)) 231#else 232# define tdep_find_proc_info(c,ip,n) \ 233 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 234 (c)->as_arg) 235# define tdep_put_unwind_info(as,pi,arg) \ 236 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 237#endif 238 239#define tdep_get_as(c) ((c)->dwarf.as) 240#define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 241#define tdep_get_ip(c) ((c)->dwarf.ip) 242#define tdep_big_endian(as) ((as)->big_endian) 243 244extern int tdep_needs_initialization; 245 246extern void tdep_init (void); 247extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 248 unw_dyn_info_t *di, unw_proc_info_t *pi, 249 int need_unwind_info, void *arg); 250extern void *tdep_uc_addr (ucontext_t *uc, int reg); 251extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip, 252 unsigned long *segbase, unsigned long *mapoff, 253 char *path, size_t pathlen); 254extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 255 unw_word_t *valp, int write); 256extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 257 unw_fpreg_t *valp, int write); 258 259/* unwinding method selection support */ 260#define UNW_ARM_METHOD_ALL 0xFF 261#define UNW_ARM_METHOD_DWARF 0x01 262#define UNW_ARM_METHOD_FRAME 0x02 263#define UNW_ARM_METHOD_EXIDX 0x04 264 265#define unwi_unwind_method UNW_OBJ(unwind_method) 266extern int unwi_unwind_method; 267 268#define UNW_TRY_METHOD(x) (unwi_unwind_method & x) 269 270#endif /* ARM_LIBUNWIND_I_H */ 271