1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2001-2005 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5 This file is part of libunwind. 6 7 Permission is hereby granted, free of charge, to any person obtaining 8 a copy of this software and associated documentation files (the 9 "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sublicense, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice shall be 16 included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26 #ifndef IA64_LIBUNWIND_I_H 27 #define IA64_LIBUNWIND_I_H 28 29 /* Target-dependent definitions that are internal to libunwind but need 30 to be shared with target-independent code. */ 31 32 #include "elf64.h" 33 /* Add For Cache MAP And ELF */ 34 #include "map_info.h" 35 /* Add For Cache MAP And ELF */ 36 #include "mempool.h" 37 #include <stdatomic.h> 38 39 typedef struct 40 { 41 /* no ia64-specific fast trace */ 42 } 43 unw_tdep_frame_t; 44 45 enum ia64_pregnum 46 { 47 /* primary unat: */ 48 IA64_REG_PRI_UNAT_GR, 49 IA64_REG_PRI_UNAT_MEM, 50 51 /* memory stack (order matters: see build_script() */ 52 IA64_REG_PSP, /* previous memory stack pointer */ 53 /* register stack */ 54 IA64_REG_BSP, /* register stack pointer */ 55 IA64_REG_BSPSTORE, 56 IA64_REG_PFS, /* previous function state */ 57 IA64_REG_RNAT, 58 /* instruction pointer: */ 59 IA64_REG_IP, 60 61 /* preserved registers: */ 62 IA64_REG_R4, IA64_REG_R5, IA64_REG_R6, IA64_REG_R7, 63 IA64_REG_NAT4, IA64_REG_NAT5, IA64_REG_NAT6, IA64_REG_NAT7, 64 IA64_REG_UNAT, IA64_REG_PR, IA64_REG_LC, IA64_REG_FPSR, 65 IA64_REG_B1, IA64_REG_B2, IA64_REG_B3, IA64_REG_B4, IA64_REG_B5, 66 IA64_REG_F2, IA64_REG_F3, IA64_REG_F4, IA64_REG_F5, 67 IA64_REG_F16, IA64_REG_F17, IA64_REG_F18, IA64_REG_F19, 68 IA64_REG_F20, IA64_REG_F21, IA64_REG_F22, IA64_REG_F23, 69 IA64_REG_F24, IA64_REG_F25, IA64_REG_F26, IA64_REG_F27, 70 IA64_REG_F28, IA64_REG_F29, IA64_REG_F30, IA64_REG_F31, 71 IA64_NUM_PREGS 72 }; 73 74 #ifdef UNW_LOCAL_ONLY 75 76 typedef unw_word_t ia64_loc_t; 77 78 #else /* !UNW_LOCAL_ONLY */ 79 80 typedef struct ia64_loc 81 { 82 unw_word_t w0, w1; 83 } 84 ia64_loc_t; 85 86 #endif /* !UNW_LOCAL_ONLY */ 87 88 #include "script.h" 89 90 #define ABI_UNKNOWN 0 91 #define ABI_LINUX 1 92 #define ABI_HPUX 2 93 #define ABI_FREEBSD 3 94 #define ABI_OPENVMS 4 95 #define ABI_NSK 5 /* Tandem/HP Non-Stop Kernel */ 96 #define ABI_WINDOWS 6 97 98 struct unw_addr_space 99 { 100 struct unw_accessors acc; 101 int big_endian; 102 int abi; /* abi < 0 => unknown, 0 => SysV, 1 => HP-UX, 2 => Windows */ 103 unw_caching_policy_t caching_policy; 104 _Atomic uint32_t cache_generation; 105 unw_word_t dyn_generation; 106 unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */ 107 #ifndef UNW_REMOTE_ONLY 108 unsigned long long shared_object_removals; 109 #endif 110 111 struct ia64_script_cache global_cache; 112 113 /* Add For Cache MAP And ELF */ 114 struct map_info *map_list; 115 /* Add For Cache MAP And ELF */ 116 }; 117 118 /* Note: The ABI numbers in the ABI-markers (.unwabi directive) are 119 not the same as the above ABI numbers. */ 120 #define ABI_MARKER_OLD_LINUX_SIGTRAMP ((0 << 8) | 's') 121 #define ABI_MARKER_OLD_LINUX_INTERRUPT ((0 << 8) | 'i') 122 #define ABI_MARKER_HP_UX_SIGTRAMP ((1 << 8) | 1) 123 #define ABI_MARKER_LINUX_SIGTRAMP ((3 << 8) | 's') 124 #define ABI_MARKER_LINUX_INTERRUPT ((3 << 8) | 'i') 125 126 struct cursor 127 { 128 void *as_arg; /* argument to address-space callbacks */ 129 unw_addr_space_t as; /* reference to per-address-space info */ 130 131 /* IP, CFM, and predicate cache (these are always equal to the 132 values stored in ip_loc, cfm_loc, and pr_loc, 133 respectively). */ 134 unw_word_t ip; /* instruction pointer value */ 135 unw_word_t cfm; /* current frame mask */ 136 unw_word_t pr; /* current predicate values */ 137 138 /* current frame info: */ 139 unw_word_t bsp; /* backing store pointer value */ 140 unw_word_t sp; /* stack pointer value */ 141 unw_word_t psp; /* previous sp value */ 142 ia64_loc_t cfm_loc; /* cfm save location (or NULL) */ 143 ia64_loc_t ec_loc; /* ar.ec save location (usually cfm_loc) */ 144 ia64_loc_t loc[IA64_NUM_PREGS]; 145 146 unw_word_t eh_args[4]; /* exception handler arguments */ 147 unw_word_t sigcontext_addr; /* address of sigcontext or 0 */ 148 unw_word_t sigcontext_off; /* sigcontext-offset relative to signal sp */ 149 150 short hint; 151 short prev_script; 152 153 uint8_t nat_bitnr[4]; /* NaT bit numbers for r4-r7 */ 154 uint16_t abi_marker; /* abi_marker for current frame (if any) */ 155 uint16_t last_abi_marker; /* last abi_marker encountered so far */ 156 uint8_t eh_valid_mask; 157 158 unsigned int pi_valid :1; /* is proc_info valid? */ 159 unsigned int pi_is_dynamic :1; /* proc_info found via dynamic proc info? */ 160 unw_proc_info_t pi; /* info about current procedure */ 161 162 /* In case of stack-discontiguities, such as those introduced by 163 signal-delivery on an alternate signal-stack (see 164 sigaltstack(2)), we use the following data-structure to keep 165 track of the register-backing-store areas across on which the 166 current frame may be backed up. Since there are at most 96 167 stacked registers and since we only have to track the current 168 frame and only areas that are not empty, this puts an upper 169 limit on the # of backing-store areas we have to track. 170 171 Note that the rbs-area indexed by rbs_curr identifies the 172 rbs-area that was in effect at the time AR.BSP had the value 173 c->bsp. However, this rbs area may not actually contain the 174 value in the register that c->bsp corresponds to because that 175 register may not have gotten spilled until much later, when a 176 possibly different rbs-area might have been in effect 177 already. */ 178 uint8_t rbs_curr; /* index of curr. rbs-area (contains c->bsp) */ 179 uint8_t rbs_left_edge; /* index of inner-most valid rbs-area */ 180 struct rbs_area 181 { 182 unw_word_t end; 183 unw_word_t size; 184 ia64_loc_t rnat_loc; 185 } 186 rbs_area[96 + 2]; /* 96 stacked regs + 1 extra stack on each side... */ 187 }; 188 189 struct ia64_global_unwind_state 190 { 191 pthread_mutex_t lock; /* global data lock */ 192 193 volatile char init_done; 194 195 /* Table of registers that prologues can save (and order in which 196 they're saved). */ 197 const unsigned char save_order[8]; 198 199 /* 200 * uc_addr() may return pointers to these variables. We need to 201 * make sure they don't get written via ia64_put() or 202 * ia64_putfp(). To make it possible to test for these variables 203 * quickly, we collect them in a single sub-structure. 204 */ 205 struct 206 { 207 unw_word_t r0; /* r0 is byte-order neutral */ 208 unw_fpreg_t f0; /* f0 is byte-order neutral */ 209 unw_fpreg_t f1_le, f1_be; /* f1 is byte-order dependent */ 210 } 211 read_only; 212 unw_fpreg_t nat_val_le, nat_val_be; 213 unw_fpreg_t int_val_le, int_val_be; 214 215 struct mempool reg_state_pool; 216 struct mempool labeled_state_pool; 217 218 # if UNW_DEBUG 219 const char *preg_name[IA64_NUM_PREGS]; 220 # endif 221 }; 222 223 #define tdep_getcontext_trace unw_getcontext 224 #define tdep_init_done unw.init_done 225 #define tdep_init UNW_OBJ(init) 226 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define 227 tdep_search_unwind_table. */ 228 #define tdep_search_unwind_table unw_search_ia64_unwind_table 229 #define tdep_find_unwind_table ia64_find_unwind_table 230 #define tdep_find_proc_info UNW_OBJ(find_proc_info) 231 #define tdep_uc_addr UNW_OBJ(uc_addr) 232 #define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image) 233 #define tdep_get_exe_image_path UNW_ARCH_OBJ(get_exe_image_path) 234 #define tdep_access_reg UNW_OBJ(access_reg) 235 #define tdep_access_fpreg UNW_OBJ(access_fpreg) 236 #define tdep_fetch_frame(c,ip,n) do {} while(0) 237 #define tdep_cache_frame(c) 0 238 #define tdep_reuse_frame(c,frame) do {} while(0) 239 #define tdep_stash_frame(c,rs) do {} while(0) 240 #define tdep_trace(cur,addr,n) (-UNW_ENOINFO) 241 #define tdep_get_as(c) ((c)->as) 242 #define tdep_get_as_arg(c) ((c)->as_arg) 243 #define tdep_get_ip(c) ((c)->ip) 244 #define tdep_big_endian(as) ((c)->as->big_endian != 0) 245 246 #ifndef UNW_LOCAL_ONLY 247 # define tdep_put_unwind_info UNW_OBJ(put_unwind_info) 248 #endif 249 250 /* This can't be an UNW_ARCH_OBJ() because we need separate 251 unw.initialized flags for the local-only and generic versions of 252 the library. Also, if we wanted to have a single, shared global 253 data structure, we couldn't declare "unw" as HIDDEN. */ 254 #define unw UNW_OBJ(data) 255 256 extern void tdep_init (void); 257 extern int tdep_find_unwind_table (struct elf_dyn_info *edi, 258 unw_addr_space_t as, char *path, 259 unw_word_t segbase, unw_word_t mapoff, 260 unw_word_t ip); 261 extern int tdep_find_proc_info (unw_addr_space_t as, unw_word_t ip, 262 unw_proc_info_t *pi, int need_unwind_info, 263 void *arg); 264 extern void tdep_put_unwind_info (unw_addr_space_t as, 265 unw_proc_info_t *pi, void *arg); 266 extern void *tdep_uc_addr (ucontext_t *uc, unw_regnum_t regnum, 267 uint8_t *nat_bitnr); 268 /* Add For Cache MAP And ELF */ 269 extern struct map_info *tdep_get_elf_image (unw_addr_space_t as, pid_t pid, 270 unw_word_t ip); 271 /* Add For Cache MAP And ELF */ 272 extern void tdep_get_exe_image_path (char *path); 273 extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg, 274 unw_word_t *valp, int write); 275 extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, 276 unw_fpreg_t *valp, int write); 277 278 extern struct ia64_global_unwind_state unw; 279 280 /* In user-level, we have no reasonable way of determining the base of 281 an arbitrary backing-store. We default to half the 282 address-space. */ 283 #define rbs_get_base(c,bspstore,rbs_basep) \ 284 (*(rbs_basep) = (bspstore) - (((unw_word_t) 1) << 63), 0) 285 286 #endif /* IA64_LIBUNWIND_I_H */ 287