1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2002-2005 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 5 Modified for x86_64 by Max Asbock <masbock (at) us.ibm.com> 6 7 This file is part of libunwind. 8 9 Permission is hereby granted, free of charge, to any person obtaining 10 a copy of this software and associated documentation files (the 11 "Software"), to deal in the Software without restriction, including 12 without limitation the rights to use, copy, modify, merge, publish, 13 distribute, sublicense, and/or sell copies of the Software, and to 14 permit persons to whom the Software is furnished to do so, subject to 15 the following conditions: 16 17 The above copyright notice and this permission notice shall be 18 included in all copies or substantial portions of the Software. 19 20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 27 28 #ifndef X86_64_LIBUNWIND_I_H 29 #define X86_64_LIBUNWIND_I_H 30 31 /* Target-dependent definitions that are internal to libunwind but need 32 to be shared with target-independent code. */ 33 34 #include <stdlib.h> 35 #include <libunwind.h> 36 37 #include "elf64.h" 38 /* ANDROID support update. */ 39 #include "map_info.h" 40 /* End of ANDROID update. */ 41 #include "mempool.h" 42 #include "dwarf.h" 43 44 typedef enum 45 { 46 UNW_X86_64_FRAME_STANDARD = -2, /* regular rbp, rsp +/- offset */ 47 UNW_X86_64_FRAME_SIGRETURN = -1, /* special sigreturn frame */ 48 UNW_X86_64_FRAME_OTHER = 0, /* not cacheable (special or unrecognised) */ 49 UNW_X86_64_FRAME_GUESSED = 1 /* guessed it was regular, but not known */ 50 } 51 unw_tdep_frame_type_t; 52 53 typedef struct 54 { 55 uint64_t virtual_address; 56 int64_t frame_type : 2; /* unw_tdep_frame_type_t classification */ 57 int64_t last_frame : 1; /* non-zero if last frame in chain */ 58 int64_t cfa_reg_rsp : 1; /* cfa dwarf base register is rsp vs. rbp */ 59 int64_t cfa_reg_offset : 30; /* cfa is at this offset from base register value */ 60 int64_t rbp_cfa_offset : 15; /* rbp saved at this offset from cfa (-1 = not saved) */ 61 int64_t rsp_cfa_offset : 15; /* rsp saved at this offset from cfa (-1 = not saved) */ 62 } 63 unw_tdep_frame_t; 64 65 struct unw_addr_space 66 { 67 struct unw_accessors acc; 68 unw_caching_policy_t caching_policy; 69 #ifdef HAVE_ATOMIC_OPS_H 70 AO_t cache_generation; 71 #else 72 uint32_t cache_generation; 73 #endif 74 unw_word_t dyn_generation; /* see dyn-common.h */ 75 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */ 76 struct dwarf_rs_cache global_cache; 77 struct unw_debug_frame_list *debug_frames; 78 /* ANDROID support update. */ 79 struct map_info *map_list; 80 /* End of ANDROID update. */ 81 }; 82 83 struct cursor 84 { 85 struct dwarf_cursor dwarf; /* must be first */ 86 87 unw_tdep_frame_t frame_info; /* quick tracing assist info */ 88 89 /* Format of sigcontext structure and address at which it is 90 stored: */ 91 enum 92 { 93 X86_64_SCF_NONE, /* no signal frame encountered */ 94 X86_64_SCF_LINUX_RT_SIGFRAME, /* Linux ucontext_t */ 95 X86_64_SCF_FREEBSD_SIGFRAME, /* FreeBSD signal frame */ 96 X86_64_SCF_FREEBSD_SYSCALL, /* FreeBSD syscall */ 97 } 98 sigcontext_format; 99 unw_word_t sigcontext_addr; 100 int validate; 101 ucontext_t *uc; 102 }; 103 104 static inline ucontext_t * 105 dwarf_get_uc(const struct dwarf_cursor *cursor) 106 { 107 const struct cursor *c = (struct cursor *) cursor->as_arg; 108 return c->uc; 109 } 110 111 #define DWARF_GET_LOC(l) ((l).val) 112 113 #ifdef UNW_LOCAL_ONLY 114 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 115 # define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0) 116 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) }) 117 # define DWARF_IS_REG_LOC(l) 0 118 # define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 119 x86_64_r_uc_addr(dwarf_get_uc(c), (r)), 0)) 120 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 121 # define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \ 122 x86_64_r_uc_addr(dwarf_get_uc(c), (r)), 0)) 123 #else /* !UNW_LOCAL_ONLY */ 124 125 # define DWARF_LOC_TYPE_FP (1 << 0) 126 # define DWARF_LOC_TYPE_REG (1 << 1) 127 # define DWARF_NULL_LOC DWARF_LOC (0, 0) 128 # define DWARF_IS_NULL_LOC(l) \ 129 ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; }) 130 # define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) }) 131 # define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0) 132 # define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0) 133 # define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG) 134 # define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0) 135 # define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \ 136 | DWARF_LOC_TYPE_FP)) 137 138 #endif /* !UNW_LOCAL_ONLY */ 139 140 static inline int 141 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val) 142 { 143 if (DWARF_IS_NULL_LOC (loc)) 144 return -UNW_EBADREG; 145 146 abort (); 147 } 148 149 static inline int 150 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val) 151 { 152 if (DWARF_IS_NULL_LOC (loc)) 153 return -UNW_EBADREG; 154 155 abort (); 156 } 157 158 static inline int 159 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val) 160 { 161 if (DWARF_IS_NULL_LOC (loc)) 162 return -UNW_EBADREG; 163 164 if (DWARF_IS_REG_LOC (loc)) 165 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val, 166 0, c->as_arg); 167 else 168 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val, 169 0, c->as_arg); 170 } 171 172 static inline int 173 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val) 174 { 175 if (DWARF_IS_NULL_LOC (loc)) 176 return -UNW_EBADREG; 177 178 if (DWARF_IS_REG_LOC (loc)) 179 return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val, 180 1, c->as_arg); 181 else 182 return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val, 183 1, c->as_arg); 184 } 185 186 #define tdep_getcontext_trace UNW_ARCH_OBJ(getcontext_trace) 187 #define tdep_init_done UNW_OBJ(init_done) 188 #define tdep_init_mem_validate UNW_OBJ(init_mem_validate) 189 #define tdep_init UNW_OBJ(init) 190 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define 191 tdep_search_unwind_table. */ 192 #define tdep_search_unwind_table dwarf_search_unwind_table 193 #define tdep_find_unwind_table dwarf_find_unwind_table 194 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 195 #define tdep_access_reg UNW_OBJ(access_reg) 196 #define tdep_access_fpreg UNW_OBJ(access_fpreg) 197 #if __linux__ 198 # define tdep_fetch_frame UNW_OBJ(fetch_frame) 199 # define tdep_cache_frame UNW_OBJ(cache_frame) 200 # define tdep_reuse_frame UNW_OBJ(reuse_frame) 201 #else 202 # define tdep_fetch_frame(c,ip,n) do {} while(0) 203 # define tdep_cache_frame(c,rs) do {} while(0) 204 # define tdep_reuse_frame(c,rs) do {} while(0) 205 #endif 206 #define tdep_stash_frame UNW_OBJ(stash_frame) 207 #define tdep_trace UNW_OBJ(tdep_trace) 208 #define x86_64_r_uc_addr UNW_OBJ(r_uc_addr) 209 210 #ifdef UNW_LOCAL_ONLY 211 # define tdep_find_proc_info(c,ip,n) \ 212 dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \ 213 (c)->as_arg) 214 # define tdep_put_unwind_info(as,pi,arg) \ 215 dwarf_put_unwind_info((as), (pi), (arg)) 216 #else 217 # define tdep_find_proc_info(c,ip,n) \ 218 (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \ 219 (c)->as_arg) 220 # define tdep_put_unwind_info(as,pi,arg) \ 221 (*(as)->acc.put_unwind_info)((as), (pi), (arg)) 222 #endif 223 224 #define tdep_get_as(c) ((c)->dwarf.as) 225 #define tdep_get_as_arg(c) ((c)->dwarf.as_arg) 226 #define tdep_get_ip(c) ((c)->dwarf.ip) 227 #define tdep_big_endian(as) 0 228 229 extern int tdep_init_done; 230 231 extern void tdep_init (void); 232 extern void tdep_init_mem_validate (void); 233 extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip, 234 unw_dyn_info_t *di, unw_proc_info_t *pi, 235 int need_unwind_info, void *arg); 236 extern void *x86_64_r_uc_addr (ucontext_t *uc, int reg); 237 /* ANDROID support update. */ 238 extern int tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei, 239 pid_t pid, unw_word_t ip, 240 unsigned long *segbase, unsigned long *mapoff, 241 char **path); 242 /* End of ANDROID update. */ 243 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 244 unw_word_t *valp, int write); 245 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 246 unw_fpreg_t *valp, int write); 247 #if __linux__ 248 extern void tdep_fetch_frame (struct dwarf_cursor *c, unw_word_t ip, 249 int need_unwind_info); 250 extern void tdep_cache_frame (struct dwarf_cursor *c, 251 struct dwarf_reg_state *rs); 252 extern void tdep_reuse_frame (struct dwarf_cursor *c, 253 struct dwarf_reg_state *rs); 254 extern void tdep_stash_frame (struct dwarf_cursor *c, 255 struct dwarf_reg_state *rs); 256 #endif 257 258 extern int tdep_getcontext_trace (unw_tdep_context_t *); 259 extern int tdep_trace (unw_cursor_t *cursor, void **addresses, int *n); 260 261 #endif /* X86_64_LIBUNWIND_I_H */ 262
